diff options
Diffstat (limited to 'drivers/acpi/dispatcher')
| -rw-r--r-- | drivers/acpi/dispatcher/Makefile | 9 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dsfield.c | 649 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dsinit.c | 204 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dsmethod.c | 623 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dsmthdat.c | 717 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dsobject.c | 812 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dsopcode.c | 1429 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dsutils.c | 868 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dswexec.c | 745 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dswload.c | 1202 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dswscope.c | 213 | ||||
| -rw-r--r-- | drivers/acpi/dispatcher/dswstate.c | 752 |
12 files changed, 8223 insertions, 0 deletions
diff --git a/drivers/acpi/dispatcher/Makefile b/drivers/acpi/dispatcher/Makefile new file mode 100644 index 0000000..eb7e602 --- /dev/null +++ b/drivers/acpi/dispatcher/Makefile @@ -0,0 +1,9 @@ +# +# Makefile for all Linux ACPI interpreter subdirectories +# + +obj-y := dsfield.o dsmthdat.o dsopcode.o dswexec.o dswscope.o \ + dsmethod.o dsobject.o dsutils.o dswload.o dswstate.o \ + dsinit.o + +EXTRA_CFLAGS += $(ACPI_CFLAGS) diff --git a/drivers/acpi/dispatcher/dsfield.c b/drivers/acpi/dispatcher/dsfield.c new file mode 100644 index 0000000..f988a5e --- /dev/null +++ b/drivers/acpi/dispatcher/dsfield.c @@ -0,0 +1,649 @@ +/****************************************************************************** + * + * Module Name: dsfield - Dispatcher field routines + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/amlcode.h> +#include <acpi/acdispat.h> +#include <acpi/acinterp.h> +#include <acpi/acnamesp.h> +#include <acpi/acparser.h> + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dsfield") + +/* Local prototypes */ +static acpi_status +acpi_ds_get_field_names(struct acpi_create_field_info *info, + struct acpi_walk_state *walk_state, + union acpi_parse_object *arg); + +/******************************************************************************* + * + * FUNCTION: acpi_ds_create_buffer_field + * + * PARAMETERS: Op - Current parse op (create_xXField) + * walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Execute the create_field operators: + * create_bit_field_op, + * create_byte_field_op, + * create_word_field_op, + * create_dword_field_op, + * create_qword_field_op, + * create_field_op (all of which define a field in a buffer) + * + ******************************************************************************/ + +acpi_status +acpi_ds_create_buffer_field(union acpi_parse_object *op, + struct acpi_walk_state *walk_state) +{ + union acpi_parse_object *arg; + struct acpi_namespace_node *node; + acpi_status status; + union acpi_operand_object *obj_desc; + union acpi_operand_object *second_desc = NULL; + u32 flags; + + ACPI_FUNCTION_TRACE(ds_create_buffer_field); + + /* + * Get the name_string argument (name of the new buffer_field) + */ + if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { + + /* For create_field, name is the 4th argument */ + + arg = acpi_ps_get_arg(op, 3); + } else { + /* For all other create_xXXField operators, name is the 3rd argument */ + + arg = acpi_ps_get_arg(op, 2); + } + + if (!arg) { + return_ACPI_STATUS(AE_AML_NO_OPERAND); + } + + if (walk_state->deferred_node) { + node = walk_state->deferred_node; + status = AE_OK; + } else { + /* Execute flag should always be set when this function is entered */ + + if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) { + return_ACPI_STATUS(AE_AML_INTERNAL); + } + + /* Creating new namespace node, should not already exist */ + + flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | + ACPI_NS_ERROR_IF_FOUND; + + /* Mark node temporary if we are executing a method */ + + if (walk_state->method_node) { + flags |= ACPI_NS_TEMPORARY; + } + + /* Enter the name_string into the namespace */ + + status = + acpi_ns_lookup(walk_state->scope_info, + arg->common.value.string, ACPI_TYPE_ANY, + ACPI_IMODE_LOAD_PASS1, flags, walk_state, + &node); + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE(arg->common.value.string, status); + return_ACPI_STATUS(status); + } + } + + /* + * We could put the returned object (Node) on the object stack for later, + * but for now, we will put it in the "op" object that the parser uses, + * so we can get it again at the end of this scope. + */ + op->common.node = node; + + /* + * If there is no object attached to the node, this node was just created + * and we need to create the field object. Otherwise, this was a lookup + * of an existing node and we don't want to create the field object again. + */ + obj_desc = acpi_ns_get_attached_object(node); + if (obj_desc) { + return_ACPI_STATUS(AE_OK); + } + + /* + * The Field definition is not fully parsed at this time. + * (We must save the address of the AML for the buffer and index operands) + */ + + /* Create the buffer field object */ + + obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER_FIELD); + if (!obj_desc) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* + * Remember location in AML stream of the field unit opcode and operands -- + * since the buffer and index operands must be evaluated. + */ + second_desc = obj_desc->common.next_object; + second_desc->extra.aml_start = op->named.data; + second_desc->extra.aml_length = op->named.length; + obj_desc->buffer_field.node = node; + + /* Attach constructed field descriptors to parent node */ + + status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_BUFFER_FIELD); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + cleanup: + + /* Remove local reference to the object */ + + acpi_ut_remove_reference(obj_desc); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_get_field_names + * + * PARAMETERS: Info - create_field info structure + * ` walk_state - Current method state + * Arg - First parser arg for the field name list + * + * RETURN: Status + * + * DESCRIPTION: Process all named fields in a field declaration. Names are + * entered into the namespace. + * + ******************************************************************************/ + +static acpi_status +acpi_ds_get_field_names(struct acpi_create_field_info *info, + struct acpi_walk_state *walk_state, + union acpi_parse_object *arg) +{ + acpi_status status; + acpi_integer position; + + ACPI_FUNCTION_TRACE_PTR(ds_get_field_names, info); + + /* First field starts at bit zero */ + + info->field_bit_position = 0; + + /* Process all elements in the field list (of parse nodes) */ + + while (arg) { + /* + * Three types of field elements are handled: + * 1) Offset - specifies a bit offset + * 2) access_as - changes the access mode + * 3) Name - Enters a new named field into the namespace + */ + switch (arg->common.aml_opcode) { + case AML_INT_RESERVEDFIELD_OP: + + position = (acpi_integer) info->field_bit_position + + (acpi_integer) arg->common.value.size; + + if (position > ACPI_UINT32_MAX) { + ACPI_ERROR((AE_INFO, + "Bit offset within field too large (> 0xFFFFFFFF)")); + return_ACPI_STATUS(AE_SUPPORT); + } + + info->field_bit_position = (u32) position; + break; + + case AML_INT_ACCESSFIELD_OP: + + /* + * Get a new access_type and access_attribute -- to be used for all + * field units that follow, until field end or another access_as + * keyword. + * + * In field_flags, preserve the flag bits other than the + * ACCESS_TYPE bits + */ + info->field_flags = (u8) + ((info-> + field_flags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | + ((u8) ((u32) arg->common.value.integer >> 8))); + + info->attribute = (u8) (arg->common.value.integer); + break; + + case AML_INT_NAMEDFIELD_OP: + + /* Lookup the name, it should already exist */ + + status = acpi_ns_lookup(walk_state->scope_info, + (char *)&arg->named.name, + info->field_type, + ACPI_IMODE_EXECUTE, + ACPI_NS_DONT_OPEN_SCOPE, + walk_state, &info->field_node); + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE((char *)&arg->named.name, + status); + return_ACPI_STATUS(status); + } else { + arg->common.node = info->field_node; + info->field_bit_length = arg->common.value.size; + + /* + * If there is no object attached to the node, this node was + * just created and we need to create the field object. + * Otherwise, this was a lookup of an existing node and we + * don't want to create the field object again. + */ + if (!acpi_ns_get_attached_object + (info->field_node)) { + status = acpi_ex_prep_field_value(info); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + } + + /* Keep track of bit position for the next field */ + + position = (acpi_integer) info->field_bit_position + + (acpi_integer) arg->common.value.size; + + if (position > ACPI_UINT32_MAX) { + ACPI_ERROR((AE_INFO, + "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", + ACPI_CAST_PTR(char, + &info->field_node-> + name))); + return_ACPI_STATUS(AE_SUPPORT); + } + + info->field_bit_position += info->field_bit_length; + break; + + default: + + ACPI_ERROR((AE_INFO, + "Invalid opcode in field list: %X", + arg->common.aml_opcode)); + return_ACPI_STATUS(AE_AML_BAD_OPCODE); + } + + arg = arg->common.next; + } + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_create_field + * + * PARAMETERS: Op - Op containing the Field definition and args + * region_node - Object for the containing Operation Region + * ` walk_state - Current method state + * + * RETURN: Status + * + * DESCRIPTION: Create a new field in the specified operation region + * + ******************************************************************************/ + +acpi_status +acpi_ds_create_field(union acpi_parse_object *op, + struct acpi_namespace_node *region_node, + struct acpi_walk_state *walk_state) +{ + acpi_status status; + union acpi_parse_object *arg; + struct acpi_create_field_info info; + + ACPI_FUNCTION_TRACE_PTR(ds_create_field, op); + + /* First arg is the name of the parent op_region (must already exist) */ + + arg = op->common.value.arg; + if (!region_node) { + status = + acpi_ns_lookup(walk_state->scope_info, + arg->common.value.name, ACPI_TYPE_REGION, + ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, + walk_state, ®ion_node); + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE(arg->common.value.name, status); + return_ACPI_STATUS(status); + } + } + + /* Second arg is the field flags */ + + arg = arg->common.next; + info.field_flags = (u8) arg->common.value.integer; + info.attribute = 0; + + /* Each remaining arg is a Named Field */ + + info.field_type = ACPI_TYPE_LOCAL_REGION_FIELD; + info.region_node = region_node; + + status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_init_field_objects + * + * PARAMETERS: Op - Op containing the Field definition and args + * ` walk_state - Current method state + * + * RETURN: Status + * + * DESCRIPTION: For each "Field Unit" name in the argument list that is + * part of the field declaration, enter the name into the + * namespace. + * + ******************************************************************************/ + +acpi_status +acpi_ds_init_field_objects(union acpi_parse_object *op, + struct acpi_walk_state *walk_state) +{ + acpi_status status; + union acpi_parse_object *arg = NULL; + struct acpi_namespace_node *node; + u8 type = 0; + u32 flags; + + ACPI_FUNCTION_TRACE_PTR(ds_init_field_objects, op); + + /* Execute flag should always be set when this function is entered */ + + if (!(walk_state->parse_flags & ACPI_PARSE_EXECUTE)) { + if (walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP) { + + /* bank_field Op is deferred, just return OK */ + + return_ACPI_STATUS(AE_OK); + } + + return_ACPI_STATUS(AE_AML_INTERNAL); + } + + /* + * Get the field_list argument for this opcode. This is the start of the + * list of field elements. + */ + switch (walk_state->opcode) { + case AML_FIELD_OP: + arg = acpi_ps_get_arg(op, 2); + type = ACPI_TYPE_LOCAL_REGION_FIELD; + break; + + case AML_BANK_FIELD_OP: + arg = acpi_ps_get_arg(op, 4); + type = ACPI_TYPE_LOCAL_BANK_FIELD; + break; + + case AML_INDEX_FIELD_OP: + arg = acpi_ps_get_arg(op, 3); + type = ACPI_TYPE_LOCAL_INDEX_FIELD; + break; + + default: + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Creating new namespace node(s), should not already exist */ + + flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | + ACPI_NS_ERROR_IF_FOUND; + + /* Mark node(s) temporary if we are executing a method */ + + if (walk_state->method_node) { + flags |= ACPI_NS_TEMPORARY; + } + + /* + * Walk the list of entries in the field_list + * Note: field_list can be of zero length. In this case, Arg will be NULL. + */ + while (arg) { + /* + * Ignore OFFSET and ACCESSAS terms here; we are only interested in the + * field names in order to enter them into the namespace. + */ + if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { + status = acpi_ns_lookup(walk_state->scope_info, + (char *)&arg->named.name, type, + ACPI_IMODE_LOAD_PASS1, flags, + walk_state, &node); + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE((char *)&arg->named.name, + status); + if (status != AE_ALREADY_EXISTS) { + return_ACPI_STATUS(status); + } + + /* Name already exists, just ignore this error */ + + status = AE_OK; + } + + arg->common.node = node; + } + + /* Get the next field element in the list */ + + arg = arg->common.next; + } + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_create_bank_field + * + * PARAMETERS: Op - Op containing the Field definition and args + * region_node - Object for the containing Operation Region + * walk_state - Current method state + * + * RETURN: Status + * + * DESCRIPTION: Create a new bank field in the specified operation region + * + ******************************************************************************/ + +acpi_status +acpi_ds_create_bank_field(union acpi_parse_object *op, + struct acpi_namespace_node *region_node, + struct acpi_walk_state *walk_state) +{ + acpi_status status; + union acpi_parse_object *arg; + struct acpi_create_field_info info; + + ACPI_FUNCTION_TRACE_PTR(ds_create_bank_field, op); + + /* First arg is the name of the parent op_region (must already exist) */ + + arg = op->common.value.arg; + if (!region_node) { + status = + acpi_ns_lookup(walk_state->scope_info, + arg->common.value.name, ACPI_TYPE_REGION, + ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, + walk_state, ®ion_node); + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE(arg->common.value.name, status); + return_ACPI_STATUS(status); + } + } + + /* Second arg is the Bank Register (Field) (must already exist) */ + + arg = arg->common.next; + status = + acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, + ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT, walk_state, + &info.register_node); + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE(arg->common.value.string, status); + return_ACPI_STATUS(status); + } + + /* + * Third arg is the bank_value + * This arg is a term_arg, not a constant + * It will be evaluated later, by acpi_ds_eval_bank_field_operands + */ + arg = arg->common.next; + + /* Fourth arg is the field flags */ + + arg = arg->common.next; + info.field_flags = (u8) arg->common.value.integer; + + /* Each remaining arg is a Named Field */ + + info.field_type = ACPI_TYPE_LOCAL_BANK_FIELD; + info.region_node = region_node; + + /* + * Use Info.data_register_node to store bank_field Op + * It's safe because data_register_node will never be used when create bank field + * We store aml_start and aml_length in the bank_field Op for late evaluation + * Used in acpi_ex_prep_field_value(Info) + * + * TBD: Or, should we add a field in struct acpi_create_field_info, like "void *ParentOp"? + */ + info.data_register_node = (struct acpi_namespace_node *)op; + + status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_create_index_field + * + * PARAMETERS: Op - Op containing the Field definition and args + * region_node - Object for the containing Operation Region + * ` walk_state - Current method state + * + * RETURN: Status + * + * DESCRIPTION: Create a new index field in the specified operation region + * + ******************************************************************************/ + +acpi_status +acpi_ds_create_index_field(union acpi_parse_object *op, + struct acpi_namespace_node *region_node, + struct acpi_walk_state *walk_state) +{ + acpi_status status; + union acpi_parse_object *arg; + struct acpi_create_field_info info; + + ACPI_FUNCTION_TRACE_PTR(ds_create_index_field, op); + + /* First arg is the name of the Index register (must already exist) */ + + arg = op->common.value.arg; + status = + acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, + ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT, walk_state, + &info.register_node); + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE(arg->common.value.string, status); + return_ACPI_STATUS(status); + } + + /* Second arg is the data register (must already exist) */ + + arg = arg->common.next; + status = + acpi_ns_lookup(walk_state->scope_info, arg->common.value.string, + ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT, walk_state, + &info.data_register_node); + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE(arg->common.value.string, status); + return_ACPI_STATUS(status); + } + + /* Next arg is the field flags */ + + arg = arg->common.next; + info.field_flags = (u8) arg->common.value.integer; + + /* Each remaining arg is a Named Field */ + + info.field_type = ACPI_TYPE_LOCAL_INDEX_FIELD; + info.region_node = region_node; + + status = acpi_ds_get_field_names(&info, walk_state, arg->common.next); + + return_ACPI_STATUS(status); +} diff --git a/drivers/acpi/dispatcher/dsinit.c b/drivers/acpi/dispatcher/dsinit.c new file mode 100644 index 0000000..949f7c7 --- /dev/null +++ b/drivers/acpi/dispatcher/dsinit.c @@ -0,0 +1,204 @@ +/****************************************************************************** + * + * Module Name: dsinit - Object initialization namespace walk + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/acdispat.h> +#include <acpi/acnamesp.h> +#include <acpi/actables.h> + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dsinit") + +/* Local prototypes */ +static acpi_status +acpi_ds_init_one_object(acpi_handle obj_handle, + u32 level, void *context, void **return_value); + +/******************************************************************************* + * + * FUNCTION: acpi_ds_init_one_object + * + * PARAMETERS: obj_handle - Node for the object + * Level - Current nesting level + * Context - Points to a init info struct + * return_value - Not used + * + * RETURN: Status + * + * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object + * within the namespace. + * + * Currently, the only objects that require initialization are: + * 1) Methods + * 2) Operation Regions + * + ******************************************************************************/ + +static acpi_status +acpi_ds_init_one_object(acpi_handle obj_handle, + u32 level, void *context, void **return_value) +{ + struct acpi_init_walk_info *info = + (struct acpi_init_walk_info *)context; + struct acpi_namespace_node *node = + (struct acpi_namespace_node *)obj_handle; + acpi_object_type type; + acpi_status status; + + ACPI_FUNCTION_ENTRY(); + + /* + * We are only interested in NS nodes owned by the table that + * was just loaded + */ + if (node->owner_id != info->owner_id) { + return (AE_OK); + } + + info->object_count++; + + /* And even then, we are only interested in a few object types */ + + type = acpi_ns_get_type(obj_handle); + + switch (type) { + case ACPI_TYPE_REGION: + + status = acpi_ds_initialize_region(obj_handle); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, + "During Region initialization %p [%4.4s]", + obj_handle, + acpi_ut_get_node_name(obj_handle))); + } + + info->op_region_count++; + break; + + case ACPI_TYPE_METHOD: + + info->method_count++; + break; + + case ACPI_TYPE_DEVICE: + + info->device_count++; + break; + + default: + break; + } + + /* + * We ignore errors from above, and always return OK, since + * we don't want to abort the walk on a single error. + */ + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_initialize_objects + * + * PARAMETERS: table_desc - Descriptor for parent ACPI table + * start_node - Root of subtree to be initialized. + * + * RETURN: Status + * + * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any + * necessary initialization on the objects found therein + * + ******************************************************************************/ + +acpi_status +acpi_ds_initialize_objects(u32 table_index, + struct acpi_namespace_node * start_node) +{ + acpi_status status; + struct acpi_init_walk_info info; + struct acpi_table_header *table; + acpi_owner_id owner_id; + + ACPI_FUNCTION_TRACE(ds_initialize_objects); + + status = acpi_tb_get_owner_id(table_index, &owner_id); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "**** Starting initialization of namespace objects ****\n")); + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:")); + + info.method_count = 0; + info.op_region_count = 0; + info.object_count = 0; + info.device_count = 0; + info.table_index = table_index; + info.owner_id = owner_id; + + /* Walk entire namespace from the supplied root */ + + status = acpi_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX, + acpi_ds_init_one_object, &info, NULL); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace")); + } + + status = acpi_get_table_by_index(table_index, &table); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, + "\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n", + table->signature, owner_id, info.object_count, + info.device_count, info.method_count, + info.op_region_count)); + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "%hd Methods, %hd Regions\n", info.method_count, + info.op_region_count)); + + return_ACPI_STATUS(AE_OK); +} diff --git a/drivers/acpi/dispatcher/dsmethod.c b/drivers/acpi/dispatcher/dsmethod.c new file mode 100644 index 0000000..279a5a6 --- /dev/null +++ b/drivers/acpi/dispatcher/dsmethod.c @@ -0,0 +1,623 @@ +/****************************************************************************** + * + * Module Name: dsmethod - Parser/Interpreter interface - control method parsing + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/amlcode.h> +#include <acpi/acdispat.h> +#include <acpi/acinterp.h> +#include <acpi/acnamesp.h> +#include <acpi/acdisasm.h> + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dsmethod") + +/* Local prototypes */ +static acpi_status +acpi_ds_create_method_mutex(union acpi_operand_object *method_desc); + +/******************************************************************************* + * + * FUNCTION: acpi_ds_method_error + * + * PARAMETERS: Status - Execution status + * walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Called on method error. Invoke the global exception handler if + * present, dump the method data if the disassembler is configured + * + * Note: Allows the exception handler to change the status code + * + ******************************************************************************/ + +acpi_status +acpi_ds_method_error(acpi_status status, struct acpi_walk_state *walk_state) +{ + ACPI_FUNCTION_ENTRY(); + + /* Ignore AE_OK and control exception codes */ + + if (ACPI_SUCCESS(status) || (status & AE_CODE_CONTROL)) { + return (status); + } + + /* Invoke the global exception handler */ + + if (acpi_gbl_exception_handler) { + + /* Exit the interpreter, allow handler to execute methods */ + + acpi_ex_exit_interpreter(); + + /* + * Handler can map the exception code to anything it wants, including + * AE_OK, in which case the executing method will not be aborted. + */ + status = acpi_gbl_exception_handler(status, + walk_state->method_node ? + walk_state->method_node-> + name.integer : 0, + walk_state->opcode, + walk_state->aml_offset, + NULL); + acpi_ex_enter_interpreter(); + } + + acpi_ds_clear_implicit_return(walk_state); + +#ifdef ACPI_DISASSEMBLER + if (ACPI_FAILURE(status)) { + + /* Display method locals/args if disassembler is present */ + + acpi_dm_dump_method_info(status, walk_state, walk_state->op); + } +#endif + + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_create_method_mutex + * + * PARAMETERS: obj_desc - The method object + * + * RETURN: Status + * + * DESCRIPTION: Create a mutex object for a serialized control method + * + ******************************************************************************/ + +static acpi_status +acpi_ds_create_method_mutex(union acpi_operand_object *method_desc) +{ + union acpi_operand_object *mutex_desc; + acpi_status status; + + ACPI_FUNCTION_TRACE(ds_create_method_mutex); + + /* Create the new mutex object */ + + mutex_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX); + if (!mutex_desc) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Create the actual OS Mutex */ + + status = acpi_os_create_mutex(&mutex_desc->mutex.os_mutex); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + mutex_desc->mutex.sync_level = method_desc->method.sync_level; + method_desc->method.mutex = mutex_desc; + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_begin_method_execution + * + * PARAMETERS: method_node - Node of the method + * obj_desc - The method object + * walk_state - current state, NULL if not yet executing + * a method. + * + * RETURN: Status + * + * DESCRIPTION: Prepare a method for execution. Parses the method if necessary, + * increments the thread count, and waits at the method semaphore + * for clearance to execute. + * + ******************************************************************************/ + +acpi_status +acpi_ds_begin_method_execution(struct acpi_namespace_node *method_node, + union acpi_operand_object *obj_desc, + struct acpi_walk_state *walk_state) +{ + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE_PTR(ds_begin_method_execution, method_node); + + if (!method_node) { + return_ACPI_STATUS(AE_NULL_ENTRY); + } + + /* Prevent wraparound of thread count */ + + if (obj_desc->method.thread_count == ACPI_UINT8_MAX) { + ACPI_ERROR((AE_INFO, + "Method reached maximum reentrancy limit (255)")); + return_ACPI_STATUS(AE_AML_METHOD_LIMIT); + } + + /* + * If this method is serialized, we need to acquire the method mutex. + */ + if (obj_desc->method.method_flags & AML_METHOD_SERIALIZED) { + /* + * Create a mutex for the method if it is defined to be Serialized + * and a mutex has not already been created. We defer the mutex creation + * until a method is actually executed, to minimize the object count + */ + if (!obj_desc->method.mutex) { + status = acpi_ds_create_method_mutex(obj_desc); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + + /* + * The current_sync_level (per-thread) must be less than or equal to + * the sync level of the method. This mechanism provides some + * deadlock prevention + * + * Top-level method invocation has no walk state at this point + */ + if (walk_state && + (walk_state->thread->current_sync_level > + obj_desc->method.mutex->mutex.sync_level)) { + ACPI_ERROR((AE_INFO, + "Cannot acquire Mutex for method [%4.4s], current SyncLevel is too large (%d)", + acpi_ut_get_node_name(method_node), + walk_state->thread->current_sync_level)); + + return_ACPI_STATUS(AE_AML_MUTEX_ORDER); + } + + /* + * Obtain the method mutex if necessary. Do not acquire mutex for a + * recursive call. + */ + if (!walk_state || + !obj_desc->method.mutex->mutex.thread_id || + (walk_state->thread->thread_id != + obj_desc->method.mutex->mutex.thread_id)) { + /* + * Acquire the method mutex. This releases the interpreter if we + * block (and reacquires it before it returns) + */ + status = + acpi_ex_system_wait_mutex(obj_desc->method.mutex-> + mutex.os_mutex, + ACPI_WAIT_FOREVER); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Update the mutex and walk info and save the original sync_level */ + + if (walk_state) { + obj_desc->method.mutex->mutex. + original_sync_level = + walk_state->thread->current_sync_level; + + obj_desc->method.mutex->mutex.thread_id = + walk_state->thread->thread_id; + walk_state->thread->current_sync_level = + obj_desc->method.sync_level; + } else { + obj_desc->method.mutex->mutex. + original_sync_level = + obj_desc->method.mutex->mutex.sync_level; + } + } + + /* Always increase acquisition depth */ + + obj_desc->method.mutex->mutex.acquisition_depth++; + } + + /* + * Allocate an Owner ID for this method, only if this is the first thread + * to begin concurrent execution. We only need one owner_id, even if the + * method is invoked recursively. + */ + if (!obj_desc->method.owner_id) { + status = acpi_ut_allocate_owner_id(&obj_desc->method.owner_id); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + } + + /* + * Increment the method parse tree thread count since it has been + * reentered one more time (even if it is the same thread) + */ + obj_desc->method.thread_count++; + return_ACPI_STATUS(status); + + cleanup: + /* On error, must release the method mutex (if present) */ + + if (obj_desc->method.mutex) { + acpi_os_release_mutex(obj_desc->method.mutex->mutex.os_mutex); + } + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_call_control_method + * + * PARAMETERS: Thread - Info for this thread + * this_walk_state - Current walk state + * Op - Current Op to be walked + * + * RETURN: Status + * + * DESCRIPTION: Transfer execution to a called control method + * + ******************************************************************************/ + +acpi_status +acpi_ds_call_control_method(struct acpi_thread_state *thread, + struct acpi_walk_state *this_walk_state, + union acpi_parse_object *op) +{ + acpi_status status; + struct acpi_namespace_node *method_node; + struct acpi_walk_state *next_walk_state = NULL; + union acpi_operand_object *obj_desc; + struct acpi_evaluate_info *info; + u32 i; + + ACPI_FUNCTION_TRACE_PTR(ds_call_control_method, this_walk_state); + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Calling method %p, currentstate=%p\n", + this_walk_state->prev_op, this_walk_state)); + + /* + * Get the namespace entry for the control method we are about to call + */ + method_node = this_walk_state->method_call_node; + if (!method_node) { + return_ACPI_STATUS(AE_NULL_ENTRY); + } + + obj_desc = acpi_ns_get_attached_object(method_node); + if (!obj_desc) { + return_ACPI_STATUS(AE_NULL_OBJECT); + } + + /* Init for new method, possibly wait on method mutex */ + + status = acpi_ds_begin_method_execution(method_node, obj_desc, + this_walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Begin method parse/execution. Create a new walk state */ + + next_walk_state = acpi_ds_create_walk_state(obj_desc->method.owner_id, + NULL, obj_desc, thread); + if (!next_walk_state) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* + * The resolved arguments were put on the previous walk state's operand + * stack. Operands on the previous walk state stack always + * start at index 0. Also, null terminate the list of arguments + */ + this_walk_state->operands[this_walk_state->num_operands] = NULL; + + /* + * Allocate and initialize the evaluation information block + * TBD: this is somewhat inefficient, should change interface to + * ds_init_aml_walk. For now, keeps this struct off the CPU stack + */ + info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); + if (!info) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + info->parameters = &this_walk_state->operands[0]; + + status = acpi_ds_init_aml_walk(next_walk_state, NULL, method_node, + obj_desc->method.aml_start, + obj_desc->method.aml_length, info, + ACPI_IMODE_EXECUTE); + + ACPI_FREE(info); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + /* + * Delete the operands on the previous walkstate operand stack + * (they were copied to new objects) + */ + for (i = 0; i < obj_desc->method.param_count; i++) { + acpi_ut_remove_reference(this_walk_state->operands[i]); + this_walk_state->operands[i] = NULL; + } + + /* Clear the operand stack */ + + this_walk_state->num_operands = 0; + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "**** Begin nested execution of [%4.4s] **** WalkState=%p\n", + method_node->name.ascii, next_walk_state)); + + /* Invoke an internal method if necessary */ + + if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) { + status = obj_desc->method.implementation(next_walk_state); + } + + return_ACPI_STATUS(status); + + cleanup: + + /* On error, we must terminate the method properly */ + + acpi_ds_terminate_control_method(obj_desc, next_walk_state); + if (next_walk_state) { + acpi_ds_delete_walk_state(next_walk_state); + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_restart_control_method + * + * PARAMETERS: walk_state - State for preempted method (caller) + * return_desc - Return value from the called method + * + * RETURN: Status + * + * DESCRIPTION: Restart a method that was preempted by another (nested) method + * invocation. Handle the return value (if any) from the callee. + * + ******************************************************************************/ + +acpi_status +acpi_ds_restart_control_method(struct acpi_walk_state *walk_state, + union acpi_operand_object *return_desc) +{ + acpi_status status; + int same_as_implicit_return; + + ACPI_FUNCTION_TRACE_PTR(ds_restart_control_method, walk_state); + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "****Restart [%4.4s] Op %p ReturnValueFromCallee %p\n", + acpi_ut_get_node_name(walk_state->method_node), + walk_state->method_call_op, return_desc)); + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + " ReturnFromThisMethodUsed?=%X ResStack %p Walk %p\n", + walk_state->return_used, + walk_state->results, walk_state)); + + /* Did the called method return a value? */ + + if (return_desc) { + + /* Is the implicit return object the same as the return desc? */ + + same_as_implicit_return = + (walk_state->implicit_return_obj == return_desc); + + /* Are we actually going to use the return value? */ + + if (walk_state->return_used) { + + /* Save the return value from the previous method */ + + status = acpi_ds_result_push(return_desc, walk_state); + if (ACPI_FAILURE(status)) { + acpi_ut_remove_reference(return_desc); + return_ACPI_STATUS(status); + } + + /* + * Save as THIS method's return value in case it is returned + * immediately to yet another method + */ + walk_state->return_desc = return_desc; + } + + /* + * The following code is the optional support for the so-called + * "implicit return". Some AML code assumes that the last value of the + * method is "implicitly" returned to the caller, in the absence of an + * explicit return value. + * + * Just save the last result of the method as the return value. + * + * NOTE: this is optional because the ASL language does not actually + * support this behavior. + */ + else if (!acpi_ds_do_implicit_return + (return_desc, walk_state, FALSE) + || same_as_implicit_return) { + /* + * Delete the return value if it will not be used by the + * calling method or remove one reference if the explicit return + * is the same as the implicit return value. + */ + acpi_ut_remove_reference(return_desc); + } + } + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_terminate_control_method + * + * PARAMETERS: method_desc - Method object + * walk_state - State associated with the method + * + * RETURN: None + * + * DESCRIPTION: Terminate a control method. Delete everything that the method + * created, delete all locals and arguments, and delete the parse + * tree if requested. + * + * MUTEX: Interpreter is locked + * + ******************************************************************************/ + +void +acpi_ds_terminate_control_method(union acpi_operand_object *method_desc, + struct acpi_walk_state *walk_state) +{ + + ACPI_FUNCTION_TRACE_PTR(ds_terminate_control_method, walk_state); + + /* method_desc is required, walk_state is optional */ + + if (!method_desc) { + return_VOID; + } + + if (walk_state) { + + /* Delete all arguments and locals */ + + acpi_ds_method_data_delete_all(walk_state); + + /* + * If method is serialized, release the mutex and restore the + * current sync level for this thread + */ + if (method_desc->method.mutex) { + + /* Acquisition Depth handles recursive calls */ + + method_desc->method.mutex->mutex.acquisition_depth--; + if (!method_desc->method.mutex->mutex.acquisition_depth) { + walk_state->thread->current_sync_level = + method_desc->method.mutex->mutex. + original_sync_level; + + acpi_os_release_mutex(method_desc->method. + mutex->mutex.os_mutex); + method_desc->method.mutex->mutex.thread_id = NULL; + } + } + + /* + * Delete any namespace objects created anywhere within + * the namespace by the execution of this method + */ + acpi_ns_delete_namespace_by_owner(method_desc->method.owner_id); + } + + /* Decrement the thread count on the method */ + + if (method_desc->method.thread_count) { + method_desc->method.thread_count--; + } else { + ACPI_ERROR((AE_INFO, "Invalid zero thread count in method")); + } + + /* Are there any other threads currently executing this method? */ + + if (method_desc->method.thread_count) { + /* + * Additional threads. Do not release the owner_id in this case, + * we immediately reuse it for the next thread executing this method + */ + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "*** Completed execution of one thread, %d threads remaining\n", + method_desc->method.thread_count)); + } else { + /* This is the only executing thread for this method */ + + /* + * Support to dynamically change a method from not_serialized to + * Serialized if it appears that the method is incorrectly written and + * does not support multiple thread execution. The best example of this + * is if such a method creates namespace objects and blocks. A second + * thread will fail with an AE_ALREADY_EXISTS exception + * + * This code is here because we must wait until the last thread exits + * before creating the synchronization semaphore. + */ + if ((method_desc->method.method_flags & AML_METHOD_SERIALIZED) + && (!method_desc->method.mutex)) { + (void)acpi_ds_create_method_mutex(method_desc); + } + + /* No more threads, we can free the owner_id */ + + acpi_ut_release_owner_id(&method_desc->method.owner_id); + } + + return_VOID; +} diff --git a/drivers/acpi/dispatcher/dsmthdat.c b/drivers/acpi/dispatcher/dsmthdat.c new file mode 100644 index 0000000..d03f81b --- /dev/null +++ b/drivers/acpi/dispatcher/dsmthdat.c @@ -0,0 +1,717 @@ +/******************************************************************************* + * + * Module Name: dsmthdat - control method arguments and local variables + * + ******************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/acdispat.h> +#include <acpi/acnamesp.h> +#include <acpi/acinterp.h> + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dsmthdat") + +/* Local prototypes */ +static void +acpi_ds_method_data_delete_value(u8 type, + u32 index, struct acpi_walk_state *walk_state); + +static acpi_status +acpi_ds_method_data_set_value(u8 type, + u32 index, + union acpi_operand_object *object, + struct acpi_walk_state *walk_state); + +#ifdef ACPI_OBSOLETE_FUNCTIONS +acpi_object_type +acpi_ds_method_data_get_type(u16 opcode, + u32 index, struct acpi_walk_state *walk_state); +#endif + +/******************************************************************************* + * + * FUNCTION: acpi_ds_method_data_init + * + * PARAMETERS: walk_state - Current walk state object + * + * RETURN: Status + * + * DESCRIPTION: Initialize the data structures that hold the method's arguments + * and locals. The data struct is an array of namespace nodes for + * each - this allows ref_of and de_ref_of to work properly for these + * special data types. + * + * NOTES: walk_state fields are initialized to zero by the + * ACPI_ALLOCATE_ZEROED(). + * + * A pseudo-Namespace Node is assigned to each argument and local + * so that ref_of() can return a pointer to the Node. + * + ******************************************************************************/ + +void acpi_ds_method_data_init(struct acpi_walk_state *walk_state) +{ + u32 i; + + ACPI_FUNCTION_TRACE(ds_method_data_init); + + /* Init the method arguments */ + + for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) { + ACPI_MOVE_32_TO_32(&walk_state->arguments[i].name, + NAMEOF_ARG_NTE); + walk_state->arguments[i].name.integer |= (i << 24); + walk_state->arguments[i].descriptor_type = ACPI_DESC_TYPE_NAMED; + walk_state->arguments[i].type = ACPI_TYPE_ANY; + walk_state->arguments[i].flags = + ANOBJ_END_OF_PEER_LIST | ANOBJ_METHOD_ARG; + } + + /* Init the method locals */ + + for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++) { + ACPI_MOVE_32_TO_32(&walk_state->local_variables[i].name, + NAMEOF_LOCAL_NTE); + + walk_state->local_variables[i].name.integer |= (i << 24); + walk_state->local_variables[i].descriptor_type = + ACPI_DESC_TYPE_NAMED; + walk_state->local_variables[i].type = ACPI_TYPE_ANY; + walk_state->local_variables[i].flags = + ANOBJ_END_OF_PEER_LIST | ANOBJ_METHOD_LOCAL; + } + + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_method_data_delete_all + * + * PARAMETERS: walk_state - Current walk state object + * + * RETURN: None + * + * DESCRIPTION: Delete method locals and arguments. Arguments are only + * deleted if this method was called from another method. + * + ******************************************************************************/ + +void acpi_ds_method_data_delete_all(struct acpi_walk_state *walk_state) +{ + u32 index; + + ACPI_FUNCTION_TRACE(ds_method_data_delete_all); + + /* Detach the locals */ + + for (index = 0; index < ACPI_METHOD_NUM_LOCALS; index++) { + if (walk_state->local_variables[index].object) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Deleting Local%d=%p\n", + index, + walk_state->local_variables[index]. + object)); + + /* Detach object (if present) and remove a reference */ + + acpi_ns_detach_object(&walk_state-> + local_variables[index]); + } + } + + /* Detach the arguments */ + + for (index = 0; index < ACPI_METHOD_NUM_ARGS; index++) { + if (walk_state->arguments[index].object) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Deleting Arg%d=%p\n", + index, + walk_state->arguments[index].object)); + + /* Detach object (if present) and remove a reference */ + + acpi_ns_detach_object(&walk_state->arguments[index]); + } + } + + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_method_data_init_args + * + * PARAMETERS: *Params - Pointer to a parameter list for the method + * max_param_count - The arg count for this method + * walk_state - Current walk state object + * + * RETURN: Status + * + * DESCRIPTION: Initialize arguments for a method. The parameter list is a list + * of ACPI operand objects, either null terminated or whose length + * is defined by max_param_count. + * + ******************************************************************************/ + +acpi_status +acpi_ds_method_data_init_args(union acpi_operand_object **params, + u32 max_param_count, + struct acpi_walk_state *walk_state) +{ + acpi_status status; + u32 index = 0; + + ACPI_FUNCTION_TRACE_PTR(ds_method_data_init_args, params); + + if (!params) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "No param list passed to method\n")); + return_ACPI_STATUS(AE_OK); + } + + /* Copy passed parameters into the new method stack frame */ + + while ((index < ACPI_METHOD_NUM_ARGS) && + (index < max_param_count) && params[index]) { + /* + * A valid parameter. + * Store the argument in the method/walk descriptor. + * Do not copy the arg in order to implement call by reference + */ + status = acpi_ds_method_data_set_value(ACPI_REFCLASS_ARG, index, + params[index], + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + index++; + } + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%d args passed to method\n", index)); + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_method_data_get_node + * + * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or + * ACPI_REFCLASS_ARG + * Index - Which Local or Arg whose type to get + * walk_state - Current walk state object + * Node - Where the node is returned. + * + * RETURN: Status and node + * + * DESCRIPTION: Get the Node associated with a local or arg. + * + ******************************************************************************/ + +acpi_status +acpi_ds_method_data_get_node(u8 type, + u32 index, + struct acpi_walk_state *walk_state, + struct acpi_namespace_node **node) +{ + ACPI_FUNCTION_TRACE(ds_method_data_get_node); + + /* + * Method Locals and Arguments are supported + */ + switch (type) { + case ACPI_REFCLASS_LOCAL: + + if (index > ACPI_METHOD_MAX_LOCAL) { + ACPI_ERROR((AE_INFO, + "Local index %d is invalid (max %d)", + index, ACPI_METHOD_MAX_LOCAL)); + return_ACPI_STATUS(AE_AML_INVALID_INDEX); + } + + /* Return a pointer to the pseudo-node */ + + *node = &walk_state->local_variables[index]; + break; + + case ACPI_REFCLASS_ARG: + + if (index > ACPI_METHOD_MAX_ARG) { + ACPI_ERROR((AE_INFO, + "Arg index %d is invalid (max %d)", + index, ACPI_METHOD_MAX_ARG)); + return_ACPI_STATUS(AE_AML_INVALID_INDEX); + } + + /* Return a pointer to the pseudo-node */ + + *node = &walk_state->arguments[index]; + break; + + default: + ACPI_ERROR((AE_INFO, "Type %d is invalid", type)); + return_ACPI_STATUS(AE_TYPE); + } + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_method_data_set_value + * + * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or + * ACPI_REFCLASS_ARG + * Index - Which Local or Arg to get + * Object - Object to be inserted into the stack entry + * walk_state - Current walk state object + * + * RETURN: Status + * + * DESCRIPTION: Insert an object onto the method stack at entry Opcode:Index. + * Note: There is no "implicit conversion" for locals. + * + ******************************************************************************/ + +static acpi_status +acpi_ds_method_data_set_value(u8 type, + u32 index, + union acpi_operand_object *object, + struct acpi_walk_state *walk_state) +{ + acpi_status status; + struct acpi_namespace_node *node; + + ACPI_FUNCTION_TRACE(ds_method_data_set_value); + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "NewObj %p Type %2.2X, Refs=%d [%s]\n", object, + type, object->common.reference_count, + acpi_ut_get_type_name(object->common.type))); + + /* Get the namespace node for the arg/local */ + + status = acpi_ds_method_data_get_node(type, index, walk_state, &node); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* + * Increment ref count so object can't be deleted while installed. + * NOTE: We do not copy the object in order to preserve the call by + * reference semantics of ACPI Control Method invocation. + * (See ACPI Specification 2.0_c) + */ + acpi_ut_add_reference(object); + + /* Install the object */ + + node->object = object; + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_method_data_get_value + * + * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or + * ACPI_REFCLASS_ARG + * Index - Which local_var or argument to get + * walk_state - Current walk state object + * dest_desc - Where Arg or Local value is returned + * + * RETURN: Status + * + * DESCRIPTION: Retrieve value of selected Arg or Local for this method + * Used only in acpi_ex_resolve_to_value(). + * + ******************************************************************************/ + +acpi_status +acpi_ds_method_data_get_value(u8 type, + u32 index, + struct acpi_walk_state *walk_state, + union acpi_operand_object **dest_desc) +{ + acpi_status status; + struct acpi_namespace_node *node; + union acpi_operand_object *object; + + ACPI_FUNCTION_TRACE(ds_method_data_get_value); + + /* Validate the object descriptor */ + + if (!dest_desc) { + ACPI_ERROR((AE_INFO, "Null object descriptor pointer")); + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Get the namespace node for the arg/local */ + + status = acpi_ds_method_data_get_node(type, index, walk_state, &node); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Get the object from the node */ + + object = node->object; + + /* Examine the returned object, it must be valid. */ + + if (!object) { + /* + * Index points to uninitialized object. + * This means that either 1) The expected argument was + * not passed to the method, or 2) A local variable + * was referenced by the method (via the ASL) + * before it was initialized. Either case is an error. + */ + + /* If slack enabled, init the local_x/arg_x to an Integer of value zero */ + + if (acpi_gbl_enable_interpreter_slack) { + object = + acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); + if (!object) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + object->integer.value = 0; + node->object = object; + } + + /* Otherwise, return the error */ + + else + switch (type) { + case ACPI_REFCLASS_ARG: + + ACPI_ERROR((AE_INFO, + "Uninitialized Arg[%d] at node %p", + index, node)); + + return_ACPI_STATUS(AE_AML_UNINITIALIZED_ARG); + + case ACPI_REFCLASS_LOCAL: + + ACPI_ERROR((AE_INFO, + "Uninitialized Local[%d] at node %p", + index, node)); + + return_ACPI_STATUS(AE_AML_UNINITIALIZED_LOCAL); + + default: + + ACPI_ERROR((AE_INFO, + "Not a Arg/Local opcode: %X", + type)); + return_ACPI_STATUS(AE_AML_INTERNAL); + } + } + + /* + * The Index points to an initialized and valid object. + * Return an additional reference to the object + */ + *dest_desc = object; + acpi_ut_add_reference(object); + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_method_data_delete_value + * + * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or + * ACPI_REFCLASS_ARG + * Index - Which local_var or argument to delete + * walk_state - Current walk state object + * + * RETURN: None + * + * DESCRIPTION: Delete the entry at Opcode:Index. Inserts + * a null into the stack slot after the object is deleted. + * + ******************************************************************************/ + +static void +acpi_ds_method_data_delete_value(u8 type, + u32 index, struct acpi_walk_state *walk_state) +{ + acpi_status status; + struct acpi_namespace_node *node; + union acpi_operand_object *object; + + ACPI_FUNCTION_TRACE(ds_method_data_delete_value); + + /* Get the namespace node for the arg/local */ + + status = acpi_ds_method_data_get_node(type, index, walk_state, &node); + if (ACPI_FAILURE(status)) { + return_VOID; + } + + /* Get the associated object */ + + object = acpi_ns_get_attached_object(node); + + /* + * Undefine the Arg or Local by setting its descriptor + * pointer to NULL. Locals/Args can contain both + * ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs + */ + node->object = NULL; + + if ((object) && + (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_OPERAND)) { + /* + * There is a valid object. + * Decrement the reference count by one to balance the + * increment when the object was stored. + */ + acpi_ut_remove_reference(object); + } + + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_store_object_to_local + * + * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or + * ACPI_REFCLASS_ARG + * Index - Which Local or Arg to set + * obj_desc - Value to be stored + * walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Store a value in an Arg or Local. The obj_desc is installed + * as the new value for the Arg or Local and the reference count + * for obj_desc is incremented. + * + ******************************************************************************/ + +acpi_status +acpi_ds_store_object_to_local(u8 type, + u32 index, + union acpi_operand_object *obj_desc, + struct acpi_walk_state *walk_state) +{ + acpi_status status; + struct acpi_namespace_node *node; + union acpi_operand_object *current_obj_desc; + union acpi_operand_object *new_obj_desc; + + ACPI_FUNCTION_TRACE(ds_store_object_to_local); + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Type=%2.2X Index=%d Obj=%p\n", + type, index, obj_desc)); + + /* Parameter validation */ + + if (!obj_desc) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Get the namespace node for the arg/local */ + + status = acpi_ds_method_data_get_node(type, index, walk_state, &node); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + current_obj_desc = acpi_ns_get_attached_object(node); + if (current_obj_desc == obj_desc) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Obj=%p already installed!\n", + obj_desc)); + return_ACPI_STATUS(status); + } + + /* + * If the reference count on the object is more than one, we must + * take a copy of the object before we store. A reference count + * of exactly 1 means that the object was just created during the + * evaluation of an expression, and we can safely use it since it + * is not used anywhere else. + */ + new_obj_desc = obj_desc; + if (obj_desc->common.reference_count > 1) { + status = + acpi_ut_copy_iobject_to_iobject(obj_desc, &new_obj_desc, + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + + /* + * If there is an object already in this slot, we either + * have to delete it, or if this is an argument and there + * is an object reference stored there, we have to do + * an indirect store! + */ + if (current_obj_desc) { + /* + * Check for an indirect store if an argument + * contains an object reference (stored as an Node). + * We don't allow this automatic dereferencing for + * locals, since a store to a local should overwrite + * anything there, including an object reference. + * + * If both Arg0 and Local0 contain ref_of (Local4): + * + * Store (1, Arg0) - Causes indirect store to local4 + * Store (1, Local0) - Stores 1 in local0, overwriting + * the reference to local4 + * Store (1, de_refof (Local0)) - Causes indirect store to local4 + * + * Weird, but true. + */ + if (type == ACPI_REFCLASS_ARG) { + /* + * If we have a valid reference object that came from ref_of(), + * do the indirect store + */ + if ((ACPI_GET_DESCRIPTOR_TYPE(current_obj_desc) == + ACPI_DESC_TYPE_OPERAND) + && (current_obj_desc->common.type == + ACPI_TYPE_LOCAL_REFERENCE) + && (current_obj_desc->reference.class == + ACPI_REFCLASS_REFOF)) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Arg (%p) is an ObjRef(Node), storing in node %p\n", + new_obj_desc, + current_obj_desc)); + + /* + * Store this object to the Node (perform the indirect store) + * NOTE: No implicit conversion is performed, as per the ACPI + * specification rules on storing to Locals/Args. + */ + status = + acpi_ex_store_object_to_node(new_obj_desc, + current_obj_desc-> + reference. + object, + walk_state, + ACPI_NO_IMPLICIT_CONVERSION); + + /* Remove local reference if we copied the object above */ + + if (new_obj_desc != obj_desc) { + acpi_ut_remove_reference(new_obj_desc); + } + return_ACPI_STATUS(status); + } + } + + /* Delete the existing object before storing the new one */ + + acpi_ds_method_data_delete_value(type, index, walk_state); + } + + /* + * Install the Obj descriptor (*new_obj_desc) into + * the descriptor for the Arg or Local. + * (increments the object reference count by one) + */ + status = + acpi_ds_method_data_set_value(type, index, new_obj_desc, + walk_state); + + /* Remove local reference if we copied the object above */ + + if (new_obj_desc != obj_desc) { + acpi_ut_remove_reference(new_obj_desc); + } + + return_ACPI_STATUS(status); +} + +#ifdef ACPI_OBSOLETE_FUNCTIONS +/******************************************************************************* + * + * FUNCTION: acpi_ds_method_data_get_type + * + * PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP + * Index - Which Local or Arg whose type to get + * walk_state - Current walk state object + * + * RETURN: Data type of current value of the selected Arg or Local + * + * DESCRIPTION: Get the type of the object stored in the Local or Arg + * + ******************************************************************************/ + +acpi_object_type +acpi_ds_method_data_get_type(u16 opcode, + u32 index, struct acpi_walk_state *walk_state) +{ + acpi_status status; + struct acpi_namespace_node *node; + union acpi_operand_object *object; + + ACPI_FUNCTION_TRACE(ds_method_data_get_type); + + /* Get the namespace node for the arg/local */ + + status = acpi_ds_method_data_get_node(opcode, index, walk_state, &node); + if (ACPI_FAILURE(status)) { + return_VALUE((ACPI_TYPE_NOT_FOUND)); + } + + /* Get the object */ + + object = acpi_ns_get_attached_object(node); + if (!object) { + + /* Uninitialized local/arg, return TYPE_ANY */ + + return_VALUE(ACPI_TYPE_ANY); + } + + /* Get the object type */ + + return_VALUE(ACPI_GET_OBJECT_TYPE(object)); +} +#endif diff --git a/drivers/acpi/dispatcher/dsobject.c b/drivers/acpi/dispatcher/dsobject.c new file mode 100644 index 0000000..4f08e59 --- /dev/null +++ b/drivers/acpi/dispatcher/dsobject.c @@ -0,0 +1,812 @@ +/****************************************************************************** + * + * Module Name: dsobject - Dispatcher object management routines + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/acparser.h> +#include <acpi/amlcode.h> +#include <acpi/acdispat.h> +#include <acpi/acnamesp.h> +#include <acpi/acinterp.h> + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dsobject") + +/* Local prototypes */ +static acpi_status +acpi_ds_build_internal_object(struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + union acpi_operand_object **obj_desc_ptr); + +#ifndef ACPI_NO_METHOD_EXECUTION +/******************************************************************************* + * + * FUNCTION: acpi_ds_build_internal_object + * + * PARAMETERS: walk_state - Current walk state + * Op - Parser object to be translated + * obj_desc_ptr - Where the ACPI internal object is returned + * + * RETURN: Status + * + * DESCRIPTION: Translate a parser Op object to the equivalent namespace object + * Simple objects are any objects other than a package object! + * + ******************************************************************************/ + +static acpi_status +acpi_ds_build_internal_object(struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + union acpi_operand_object **obj_desc_ptr) +{ + union acpi_operand_object *obj_desc; + acpi_status status; + + ACPI_FUNCTION_TRACE(ds_build_internal_object); + + *obj_desc_ptr = NULL; + if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { + /* + * This is a named object reference. If this name was + * previously looked up in the namespace, it was stored in this op. + * Otherwise, go ahead and look it up now + */ + if (!op->common.node) { + status = acpi_ns_lookup(walk_state->scope_info, + op->common.value.string, + ACPI_TYPE_ANY, + ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT | + ACPI_NS_DONT_OPEN_SCOPE, NULL, + ACPI_CAST_INDIRECT_PTR(struct + acpi_namespace_node, + &(op-> + common. + node))); + if (ACPI_FAILURE(status)) { + + /* Check if we are resolving a named reference within a package */ + + if ((status == AE_NOT_FOUND) + && (acpi_gbl_enable_interpreter_slack) + && + ((op->common.parent->common.aml_opcode == + AML_PACKAGE_OP) + || (op->common.parent->common.aml_opcode == + AML_VAR_PACKAGE_OP))) { + /* + * We didn't find the target and we are populating elements + * of a package - ignore if slack enabled. Some ASL code + * contains dangling invalid references in packages and + * expects that no exception will be issued. Leave the + * element as a null element. It cannot be used, but it + * can be overwritten by subsequent ASL code - this is + * typically the case. + */ + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Ignoring unresolved reference in package [%4.4s]\n", + walk_state-> + scope_info->scope. + node->name.ascii)); + + return_ACPI_STATUS(AE_OK); + } else { + ACPI_ERROR_NAMESPACE(op->common.value. + string, status); + } + + return_ACPI_STATUS(status); + } + } + + /* Special object resolution for elements of a package */ + + if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) || + (op->common.parent->common.aml_opcode == + AML_VAR_PACKAGE_OP)) { + /* + * Attempt to resolve the node to a value before we insert it into + * the package. If this is a reference to a common data type, + * resolve it immediately. According to the ACPI spec, package + * elements can only be "data objects" or method references. + * Attempt to resolve to an Integer, Buffer, String or Package. + * If cannot, return the named reference (for things like Devices, + * Methods, etc.) Buffer Fields and Fields will resolve to simple + * objects (int/buf/str/pkg). + * + * NOTE: References to things like Devices, Methods, Mutexes, etc. + * will remain as named references. This behavior is not described + * in the ACPI spec, but it appears to be an oversight. + */ + obj_desc = + ACPI_CAST_PTR(union acpi_operand_object, + op->common.node); + + status = + acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR + (struct + acpi_namespace_node, + &obj_desc), + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + switch (op->common.node->type) { + /* + * For these types, we need the actual node, not the subobject. + * However, the subobject did not get an extra reference count above. + * + * TBD: should ex_resolve_node_to_value be changed to fix this? + */ + case ACPI_TYPE_DEVICE: + case ACPI_TYPE_THERMAL: + + acpi_ut_add_reference(op->common.node->object); + + /*lint -fallthrough */ + /* + * For these types, we need the actual node, not the subobject. + * The subobject got an extra reference count in ex_resolve_node_to_value. + */ + case ACPI_TYPE_MUTEX: + case ACPI_TYPE_METHOD: + case ACPI_TYPE_POWER: + case ACPI_TYPE_PROCESSOR: + case ACPI_TYPE_EVENT: + case ACPI_TYPE_REGION: + + /* We will create a reference object for these types below */ + break; + + default: + /* + * All other types - the node was resolved to an actual + * object, we are done. + */ + goto exit; + } + } + } + + /* Create and init a new internal ACPI object */ + + obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info + (op->common.aml_opcode))-> + object_type); + if (!obj_desc) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + status = + acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode, + &obj_desc); + if (ACPI_FAILURE(status)) { + acpi_ut_remove_reference(obj_desc); + return_ACPI_STATUS(status); + } + + exit: + *obj_desc_ptr = obj_desc; + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_build_internal_buffer_obj + * + * PARAMETERS: walk_state - Current walk state + * Op - Parser object to be translated + * buffer_length - Length of the buffer + * obj_desc_ptr - Where the ACPI internal object is returned + * + * RETURN: Status + * + * DESCRIPTION: Translate a parser Op package object to the equivalent + * namespace object + * + ******************************************************************************/ + +acpi_status +acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + u32 buffer_length, + union acpi_operand_object **obj_desc_ptr) +{ + union acpi_parse_object *arg; + union acpi_operand_object *obj_desc; + union acpi_parse_object *byte_list; + u32 byte_list_length = 0; + + ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj); + + /* + * If we are evaluating a Named buffer object "Name (xxxx, Buffer)". + * The buffer object already exists (from the NS node), otherwise it must + * be created. + */ + obj_desc = *obj_desc_ptr; + if (!obj_desc) { + + /* Create a new buffer object */ + + obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); + *obj_desc_ptr = obj_desc; + if (!obj_desc) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + } + + /* + * Second arg is the buffer data (optional) byte_list can be either + * individual bytes or a string initializer. In either case, a + * byte_list appears in the AML. + */ + arg = op->common.value.arg; /* skip first arg */ + + byte_list = arg->named.next; + if (byte_list) { + if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) { + ACPI_ERROR((AE_INFO, + "Expecting bytelist, got AML opcode %X in op %p", + byte_list->common.aml_opcode, byte_list)); + + acpi_ut_remove_reference(obj_desc); + return (AE_TYPE); + } + + byte_list_length = (u32) byte_list->common.value.integer; + } + + /* + * The buffer length (number of bytes) will be the larger of: + * 1) The specified buffer length and + * 2) The length of the initializer byte list + */ + obj_desc->buffer.length = buffer_length; + if (byte_list_length > buffer_length) { + obj_desc->buffer.length = byte_list_length; + } + + /* Allocate the buffer */ + + if (obj_desc->buffer.length == 0) { + obj_desc->buffer.pointer = NULL; + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Buffer defined with zero length in AML, creating\n")); + } else { + obj_desc->buffer.pointer = + ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length); + if (!obj_desc->buffer.pointer) { + acpi_ut_delete_object_desc(obj_desc); + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Initialize buffer from the byte_list (if present) */ + + if (byte_list) { + ACPI_MEMCPY(obj_desc->buffer.pointer, + byte_list->named.data, byte_list_length); + } + } + + obj_desc->buffer.flags |= AOPOBJ_DATA_VALID; + op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc); + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_build_internal_package_obj + * + * PARAMETERS: walk_state - Current walk state + * Op - Parser object to be translated + * element_count - Number of elements in the package - this is + * the num_elements argument to Package() + * obj_desc_ptr - Where the ACPI internal object is returned + * + * RETURN: Status + * + * DESCRIPTION: Translate a parser Op package object to the equivalent + * namespace object + * + * NOTE: The number of elements in the package will be always be the num_elements + * count, regardless of the number of elements in the package list. If + * num_elements is smaller, only that many package list elements are used. + * if num_elements is larger, the Package object is padded out with + * objects of type Uninitialized (as per ACPI spec.) + * + * Even though the ASL compilers do not allow num_elements to be smaller + * than the Package list length (for the fixed length package opcode), some + * BIOS code modifies the AML on the fly to adjust the num_elements, and + * this code compensates for that. This also provides compatibility with + * other AML interpreters. + * + ******************************************************************************/ + +acpi_status +acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + u32 element_count, + union acpi_operand_object **obj_desc_ptr) +{ + union acpi_parse_object *arg; + union acpi_parse_object *parent; + union acpi_operand_object *obj_desc = NULL; + acpi_status status = AE_OK; + unsigned i; + u16 index; + u16 reference_count; + + ACPI_FUNCTION_TRACE(ds_build_internal_package_obj); + + /* Find the parent of a possibly nested package */ + + parent = op->common.parent; + while ((parent->common.aml_opcode == AML_PACKAGE_OP) || + (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) { + parent = parent->common.parent; + } + + /* + * If we are evaluating a Named package object "Name (xxxx, Package)", + * the package object already exists, otherwise it must be created. + */ + obj_desc = *obj_desc_ptr; + if (!obj_desc) { + obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE); + *obj_desc_ptr = obj_desc; + if (!obj_desc) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + obj_desc->package.node = parent->common.node; + } + + /* + * Allocate the element array (array of pointers to the individual + * objects) based on the num_elements parameter. Add an extra pointer slot + * so that the list is always null terminated. + */ + obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size) + element_count + + 1) * sizeof(void *)); + + if (!obj_desc->package.elements) { + acpi_ut_delete_object_desc(obj_desc); + return_ACPI_STATUS(AE_NO_MEMORY); + } + + obj_desc->package.count = element_count; + + /* + * Initialize the elements of the package, up to the num_elements count. + * Package is automatically padded with uninitialized (NULL) elements + * if num_elements is greater than the package list length. Likewise, + * Package is truncated if num_elements is less than the list length. + */ + arg = op->common.value.arg; + arg = arg->common.next; + for (i = 0; arg && (i < element_count); i++) { + if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) { + if (arg->common.node->type == ACPI_TYPE_METHOD) { + /* + * A method reference "looks" to the parser to be a method + * invocation, so we special case it here + */ + arg->common.aml_opcode = AML_INT_NAMEPATH_OP; + status = + acpi_ds_build_internal_object(walk_state, + arg, + &obj_desc-> + package. + elements[i]); + } else { + /* This package element is already built, just get it */ + + obj_desc->package.elements[i] = + ACPI_CAST_PTR(union acpi_operand_object, + arg->common.node); + } + } else { + status = acpi_ds_build_internal_object(walk_state, arg, + &obj_desc-> + package. + elements[i]); + } + + if (*obj_desc_ptr) { + + /* Existing package, get existing reference count */ + + reference_count = + (*obj_desc_ptr)->common.reference_count; + if (reference_count > 1) { + + /* Make new element ref count match original ref count */ + + for (index = 0; index < (reference_count - 1); + index++) { + acpi_ut_add_reference((obj_desc-> + package. + elements[i])); + } + } + } + + arg = arg->common.next; + } + + /* Check for match between num_elements and actual length of package_list */ + + if (arg) { + /* + * num_elements was exhausted, but there are remaining elements in the + * package_list. + * + * Note: technically, this is an error, from ACPI spec: "It is an error + * for NumElements to be less than the number of elements in the + * PackageList". However, for now, we just print an error message and + * no exception is returned. + */ + while (arg) { + + /* Find out how many elements there really are */ + + i++; + arg = arg->common.next; + } + + ACPI_WARNING((AE_INFO, + "Package List length (%X) larger than NumElements count (%X), truncated\n", + i, element_count)); + } else if (i < element_count) { + /* + * Arg list (elements) was exhausted, but we did not reach num_elements count. + * Note: this is not an error, the package is padded out with NULLs. + */ + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Package List length (%X) smaller than NumElements count (%X), padded with null elements\n", + i, element_count)); + } + + obj_desc->package.flags |= AOPOBJ_DATA_VALID; + op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_create_node + * + * PARAMETERS: walk_state - Current walk state + * Node - NS Node to be initialized + * Op - Parser object to be translated + * + * RETURN: Status + * + * DESCRIPTION: Create the object to be associated with a namespace node + * + ******************************************************************************/ + +acpi_status +acpi_ds_create_node(struct acpi_walk_state *walk_state, + struct acpi_namespace_node *node, + union acpi_parse_object *op) +{ + acpi_status status; + union acpi_operand_object *obj_desc; + + ACPI_FUNCTION_TRACE_PTR(ds_create_node, op); + + /* + * Because of the execution pass through the non-control-method + * parts of the table, we can arrive here twice. Only init + * the named object node the first time through + */ + if (acpi_ns_get_attached_object(node)) { + return_ACPI_STATUS(AE_OK); + } + + if (!op->common.value.arg) { + + /* No arguments, there is nothing to do */ + + return_ACPI_STATUS(AE_OK); + } + + /* Build an internal object for the argument(s) */ + + status = acpi_ds_build_internal_object(walk_state, op->common.value.arg, + &obj_desc); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Re-type the object according to its argument */ + + node->type = ACPI_GET_OBJECT_TYPE(obj_desc); + + /* Attach obj to node */ + + status = acpi_ns_attach_object(node, obj_desc, node->type); + + /* Remove local reference to the object */ + + acpi_ut_remove_reference(obj_desc); + return_ACPI_STATUS(status); +} + +#endif /* ACPI_NO_METHOD_EXECUTION */ + +/******************************************************************************* + * + * FUNCTION: acpi_ds_init_object_from_op + * + * PARAMETERS: walk_state - Current walk state + * Op - Parser op used to init the internal object + * Opcode - AML opcode associated with the object + * ret_obj_desc - Namespace object to be initialized + * + * RETURN: Status + * + * DESCRIPTION: Initialize a namespace object from a parser Op and its + * associated arguments. The namespace object is a more compact + * representation of the Op and its arguments. + * + ******************************************************************************/ + +acpi_status +acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + u16 opcode, + union acpi_operand_object **ret_obj_desc) +{ + const struct acpi_opcode_info *op_info; + union acpi_operand_object *obj_desc; + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE(ds_init_object_from_op); + + obj_desc = *ret_obj_desc; + op_info = acpi_ps_get_opcode_info(opcode); + if (op_info->class == AML_CLASS_UNKNOWN) { + + /* Unknown opcode */ + + return_ACPI_STATUS(AE_TYPE); + } + + /* Perform per-object initialization */ + + switch (ACPI_GET_OBJECT_TYPE(obj_desc)) { + case ACPI_TYPE_BUFFER: + + /* + * Defer evaluation of Buffer term_arg operand + */ + obj_desc->buffer.node = + ACPI_CAST_PTR(struct acpi_namespace_node, + walk_state->operands[0]); + obj_desc->buffer.aml_start = op->named.data; + obj_desc->buffer.aml_length = op->named.length; + break; + + case ACPI_TYPE_PACKAGE: + + /* + * Defer evaluation of Package term_arg operand + */ + obj_desc->package.node = + ACPI_CAST_PTR(struct acpi_namespace_node, + walk_state->operands[0]); + obj_desc->package.aml_start = op->named.data; + obj_desc->package.aml_length = op->named.length; + break; + + case ACPI_TYPE_INTEGER: + + switch (op_info->type) { + case AML_TYPE_CONSTANT: + /* + * Resolve AML Constants here - AND ONLY HERE! + * All constants are integers. + * We mark the integer with a flag that indicates that it started + * life as a constant -- so that stores to constants will perform + * as expected (noop). zero_op is used as a placeholder for optional + * target operands. + */ + obj_desc->common.flags = AOPOBJ_AML_CONSTANT; + + switch (opcode) { + case AML_ZERO_OP: + + obj_desc->integer.value = 0; + break; + + case AML_ONE_OP: + + obj_desc->integer.value = 1; + break; + + case AML_ONES_OP: + + obj_desc->integer.value = ACPI_INTEGER_MAX; + + /* Truncate value if we are executing from a 32-bit ACPI table */ + +#ifndef ACPI_NO_METHOD_EXECUTION + acpi_ex_truncate_for32bit_table(obj_desc); +#endif + break; + + case AML_REVISION_OP: + + obj_desc->integer.value = ACPI_CA_VERSION; + break; + + default: + + ACPI_ERROR((AE_INFO, + "Unknown constant opcode %X", + opcode)); + status = AE_AML_OPERAND_TYPE; + break; + } + break; + + case AML_TYPE_LITERAL: + + obj_desc->integer.value = op->common.value.integer; +#ifndef ACPI_NO_METHOD_EXECUTION + acpi_ex_truncate_for32bit_table(obj_desc); +#endif + break; + + default: + ACPI_ERROR((AE_INFO, "Unknown Integer type %X", + op_info->type)); + status = AE_AML_OPERAND_TYPE; + break; + } + break; + + case ACPI_TYPE_STRING: + + obj_desc->string.pointer = op->common.value.string; + obj_desc->string.length = + (u32) ACPI_STRLEN(op->common.value.string); + + /* + * The string is contained in the ACPI table, don't ever try + * to delete it + */ + obj_desc->common.flags |= AOPOBJ_STATIC_POINTER; + break; + + case ACPI_TYPE_METHOD: + break; + + case ACPI_TYPE_LOCAL_REFERENCE: + + switch (op_info->type) { + case AML_TYPE_LOCAL_VARIABLE: + + /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */ + + obj_desc->reference.value = opcode - AML_LOCAL_OP; + obj_desc->reference.class = ACPI_REFCLASS_LOCAL; + +#ifndef ACPI_NO_METHOD_EXECUTION + status = + acpi_ds_method_data_get_node(ACPI_REFCLASS_LOCAL, + obj_desc->reference. + value, walk_state, + ACPI_CAST_INDIRECT_PTR + (struct + acpi_namespace_node, + &obj_desc->reference. + object)); +#endif + break; + + case AML_TYPE_METHOD_ARGUMENT: + + /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */ + + obj_desc->reference.value = opcode - AML_ARG_OP; + obj_desc->reference.class = ACPI_REFCLASS_ARG; + +#ifndef ACPI_NO_METHOD_EXECUTION + status = acpi_ds_method_data_get_node(ACPI_REFCLASS_ARG, + obj_desc-> + reference.value, + walk_state, + ACPI_CAST_INDIRECT_PTR + (struct + acpi_namespace_node, + &obj_desc-> + reference. + object)); +#endif + break; + + default: /* Object name or Debug object */ + + switch (op->common.aml_opcode) { + case AML_INT_NAMEPATH_OP: + + /* Node was saved in Op */ + + obj_desc->reference.node = op->common.node; + obj_desc->reference.object = + op->common.node->object; + obj_desc->reference.class = ACPI_REFCLASS_NAME; + break; + + case AML_DEBUG_OP: + + obj_desc->reference.class = ACPI_REFCLASS_DEBUG; + break; + + default: + + ACPI_ERROR((AE_INFO, + "Unimplemented reference type for AML opcode: %4.4X", + opcode)); + return_ACPI_STATUS(AE_AML_OPERAND_TYPE); + } + break; + } + break; + + default: + + ACPI_ERROR((AE_INFO, "Unimplemented data type: %X", + ACPI_GET_OBJECT_TYPE(obj_desc))); + + status = AE_AML_OPERAND_TYPE; + break; + } + + return_ACPI_STATUS(status); +} diff --git a/drivers/acpi/dispatcher/dsopcode.c b/drivers/acpi/dispatcher/dsopcode.c new file mode 100644 index 0000000..69fae59 --- /dev/null +++ b/drivers/acpi/dispatcher/dsopcode.c @@ -0,0 +1,1429 @@ +/****************************************************************************** + * + * Module Name: dsopcode - Dispatcher Op Region support and handling of + * "control" opcodes + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/acparser.h> +#include <acpi/amlcode.h> +#include <acpi/acdispat.h> +#include <acpi/acinterp.h> +#include <acpi/acnamesp.h> +#include <acpi/acevents.h> +#include <acpi/actables.h> + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dsopcode") + +/* Local prototypes */ +static acpi_status +acpi_ds_execute_arguments(struct acpi_namespace_node *node, + struct acpi_namespace_node *scope_node, + u32 aml_length, u8 * aml_start); + +static acpi_status +acpi_ds_init_buffer_field(u16 aml_opcode, + union acpi_operand_object *obj_desc, + union acpi_operand_object *buffer_desc, + union acpi_operand_object *offset_desc, + union acpi_operand_object *length_desc, + union acpi_operand_object *result_desc); + +/******************************************************************************* + * + * FUNCTION: acpi_ds_execute_arguments + * + * PARAMETERS: Node - Object NS node + * scope_node - Parent NS node + * aml_length - Length of executable AML + * aml_start - Pointer to the AML + * + * RETURN: Status. + * + * DESCRIPTION: Late (deferred) execution of region or field arguments + * + ******************************************************************************/ + +static acpi_status +acpi_ds_execute_arguments(struct acpi_namespace_node *node, + struct acpi_namespace_node *scope_node, + u32 aml_length, u8 * aml_start) +{ + acpi_status status; + union acpi_parse_object *op; + struct acpi_walk_state *walk_state; + + ACPI_FUNCTION_TRACE(ds_execute_arguments); + + /* + * Allocate a new parser op to be the root of the parsed tree + */ + op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP); + if (!op) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Save the Node for use in acpi_ps_parse_aml */ + + op->common.node = scope_node; + + /* Create and initialize a new parser state */ + + walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL); + if (!walk_state) { + status = AE_NO_MEMORY; + goto cleanup; + } + + status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, + aml_length, NULL, ACPI_IMODE_LOAD_PASS1); + if (ACPI_FAILURE(status)) { + acpi_ds_delete_walk_state(walk_state); + goto cleanup; + } + + /* Mark this parse as a deferred opcode */ + + walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP; + walk_state->deferred_node = node; + + /* Pass1: Parse the entire declaration */ + + status = acpi_ps_parse_aml(walk_state); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + /* Get and init the Op created above */ + + op->common.node = node; + acpi_ps_delete_parse_tree(op); + + /* Evaluate the deferred arguments */ + + op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP); + if (!op) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + op->common.node = scope_node; + + /* Create and initialize a new parser state */ + + walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL); + if (!walk_state) { + status = AE_NO_MEMORY; + goto cleanup; + } + + /* Execute the opcode and arguments */ + + status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, + aml_length, NULL, ACPI_IMODE_EXECUTE); + if (ACPI_FAILURE(status)) { + acpi_ds_delete_walk_state(walk_state); + goto cleanup; + } + + /* Mark this execution as a deferred opcode */ + + walk_state->deferred_node = node; + status = acpi_ps_parse_aml(walk_state); + + cleanup: + acpi_ps_delete_parse_tree(op); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_get_buffer_field_arguments + * + * PARAMETERS: obj_desc - A valid buffer_field object + * + * RETURN: Status. + * + * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late + * evaluation of these field attributes. + * + ******************************************************************************/ + +acpi_status +acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc) +{ + union acpi_operand_object *extra_desc; + struct acpi_namespace_node *node; + acpi_status status; + + ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc); + + if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { + return_ACPI_STATUS(AE_OK); + } + + /* Get the AML pointer (method object) and buffer_field node */ + + extra_desc = acpi_ns_get_secondary_object(obj_desc); + node = obj_desc->buffer_field.node; + + ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname + (ACPI_TYPE_BUFFER_FIELD, node, NULL)); + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n", + acpi_ut_get_node_name(node))); + + /* Execute the AML code for the term_arg arguments */ + + status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node), + extra_desc->extra.aml_length, + extra_desc->extra.aml_start); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_get_bank_field_arguments + * + * PARAMETERS: obj_desc - A valid bank_field object + * + * RETURN: Status. + * + * DESCRIPTION: Get bank_field bank_value. This implements the late + * evaluation of these field attributes. + * + ******************************************************************************/ + +acpi_status +acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc) +{ + union acpi_operand_object *extra_desc; + struct acpi_namespace_node *node; + acpi_status status; + + ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments, obj_desc); + + if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { + return_ACPI_STATUS(AE_OK); + } + + /* Get the AML pointer (method object) and bank_field node */ + + extra_desc = acpi_ns_get_secondary_object(obj_desc); + node = obj_desc->bank_field.node; + + ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname + (ACPI_TYPE_LOCAL_BANK_FIELD, node, NULL)); + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BankField Arg Init\n", + acpi_ut_get_node_name(node))); + + /* Execute the AML code for the term_arg arguments */ + + status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node), + extra_desc->extra.aml_length, + extra_desc->extra.aml_start); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_get_buffer_arguments + * + * PARAMETERS: obj_desc - A valid Buffer object + * + * RETURN: Status. + * + * DESCRIPTION: Get Buffer length and initializer byte list. This implements + * the late evaluation of these attributes. + * + ******************************************************************************/ + +acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc) +{ + struct acpi_namespace_node *node; + acpi_status status; + + ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc); + + if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { + return_ACPI_STATUS(AE_OK); + } + + /* Get the Buffer node */ + + node = obj_desc->buffer.node; + if (!node) { + ACPI_ERROR((AE_INFO, + "No pointer back to NS node in buffer obj %p", + obj_desc)); + return_ACPI_STATUS(AE_AML_INTERNAL); + } + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n")); + + /* Execute the AML code for the term_arg arguments */ + + status = acpi_ds_execute_arguments(node, node, + obj_desc->buffer.aml_length, + obj_desc->buffer.aml_start); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_get_package_arguments + * + * PARAMETERS: obj_desc - A valid Package object + * + * RETURN: Status. + * + * DESCRIPTION: Get Package length and initializer byte list. This implements + * the late evaluation of these attributes. + * + ******************************************************************************/ + +acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc) +{ + struct acpi_namespace_node *node; + acpi_status status; + + ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc); + + if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { + return_ACPI_STATUS(AE_OK); + } + + /* Get the Package node */ + + node = obj_desc->package.node; + if (!node) { + ACPI_ERROR((AE_INFO, + "No pointer back to NS node in package %p", + obj_desc)); + return_ACPI_STATUS(AE_AML_INTERNAL); + } + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Arg Init\n")); + + /* Execute the AML code for the term_arg arguments */ + + status = acpi_ds_execute_arguments(node, node, + obj_desc->package.aml_length, + obj_desc->package.aml_start); + return_ACPI_STATUS(status); +} + +/***************************************************************************** + * + * FUNCTION: acpi_ds_get_region_arguments + * + * PARAMETERS: obj_desc - A valid region object + * + * RETURN: Status. + * + * DESCRIPTION: Get region address and length. This implements the late + * evaluation of these region attributes. + * + ****************************************************************************/ + +acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc) +{ + struct acpi_namespace_node *node; + acpi_status status; + union acpi_operand_object *extra_desc; + + ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc); + + if (obj_desc->region.flags & AOPOBJ_DATA_VALID) { + return_ACPI_STATUS(AE_OK); + } + + extra_desc = acpi_ns_get_secondary_object(obj_desc); + if (!extra_desc) { + return_ACPI_STATUS(AE_NOT_EXIST); + } + + /* Get the Region node */ + + node = obj_desc->region.node; + + ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname + (ACPI_TYPE_REGION, node, NULL)); + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] OpRegion Arg Init at AML %p\n", + acpi_ut_get_node_name(node), + extra_desc->extra.aml_start)); + + /* Execute the argument AML */ + + status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node), + extra_desc->extra.aml_length, + extra_desc->extra.aml_start); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Validate the region address/length via the host OS */ + + status = acpi_os_validate_address(obj_desc->region.space_id, + obj_desc->region.address, + (acpi_size) obj_desc->region.length, + acpi_ut_get_node_name(node)); + + if (ACPI_FAILURE(status)) { + /* + * Invalid address/length. We will emit an error message and mark + * the region as invalid, so that it will cause an additional error if + * it is ever used. Then return AE_OK. + */ + ACPI_EXCEPTION((AE_INFO, status, + "During address validation of OpRegion [%4.4s]", + node->name.ascii)); + obj_desc->common.flags |= AOPOBJ_INVALID; + status = AE_OK; + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_initialize_region + * + * PARAMETERS: obj_handle - Region namespace node + * + * RETURN: Status + * + * DESCRIPTION: Front end to ev_initialize_region + * + ******************************************************************************/ + +acpi_status acpi_ds_initialize_region(acpi_handle obj_handle) +{ + union acpi_operand_object *obj_desc; + acpi_status status; + + obj_desc = acpi_ns_get_attached_object(obj_handle); + + /* Namespace is NOT locked */ + + status = acpi_ev_initialize_region(obj_desc, FALSE); + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_init_buffer_field + * + * PARAMETERS: aml_opcode - create_xxx_field + * obj_desc - buffer_field object + * buffer_desc - Host Buffer + * offset_desc - Offset into buffer + * length_desc - Length of field (CREATE_FIELD_OP only) + * result_desc - Where to store the result + * + * RETURN: Status + * + * DESCRIPTION: Perform actual initialization of a buffer field + * + ******************************************************************************/ + +static acpi_status +acpi_ds_init_buffer_field(u16 aml_opcode, + union acpi_operand_object *obj_desc, + union acpi_operand_object *buffer_desc, + union acpi_operand_object *offset_desc, + union acpi_operand_object *length_desc, + union acpi_operand_object *result_desc) +{ + u32 offset; + u32 bit_offset; + u32 bit_count; + u8 field_flags; + acpi_status status; + + ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc); + + /* Host object must be a Buffer */ + + if (ACPI_GET_OBJECT_TYPE(buffer_desc) != ACPI_TYPE_BUFFER) { + ACPI_ERROR((AE_INFO, + "Target of Create Field is not a Buffer object - %s", + acpi_ut_get_object_type_name(buffer_desc))); + + status = AE_AML_OPERAND_TYPE; + goto cleanup; + } + + /* + * The last parameter to all of these opcodes (result_desc) started + * out as a name_string, and should therefore now be a NS node + * after resolution in acpi_ex_resolve_operands(). + */ + if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) { + ACPI_ERROR((AE_INFO, + "(%s) destination not a NS Node [%s]", + acpi_ps_get_opcode_name(aml_opcode), + acpi_ut_get_descriptor_name(result_desc))); + + status = AE_AML_OPERAND_TYPE; + goto cleanup; + } + + offset = (u32) offset_desc->integer.value; + + /* + * Setup the Bit offsets and counts, according to the opcode + */ + switch (aml_opcode) { + case AML_CREATE_FIELD_OP: + + /* Offset is in bits, count is in bits */ + + field_flags = AML_FIELD_ACCESS_BYTE; + bit_offset = offset; + bit_count = (u32) length_desc->integer.value; + + /* Must have a valid (>0) bit count */ + + if (bit_count == 0) { + ACPI_ERROR((AE_INFO, + "Attempt to CreateField of length zero")); + status = AE_AML_OPERAND_VALUE; + goto cleanup; + } + break; + + case AML_CREATE_BIT_FIELD_OP: + + /* Offset is in bits, Field is one bit */ + + bit_offset = offset; + bit_count = 1; + field_flags = AML_FIELD_ACCESS_BYTE; + break; + + case AML_CREATE_BYTE_FIELD_OP: + + /* Offset is in bytes, field is one byte */ + + bit_offset = 8 * offset; + bit_count = 8; + field_flags = AML_FIELD_ACCESS_BYTE; + break; + + case AML_CREATE_WORD_FIELD_OP: + + /* Offset is in bytes, field is one word */ + + bit_offset = 8 * offset; + bit_count = 16; + field_flags = AML_FIELD_ACCESS_WORD; + break; + + case AML_CREATE_DWORD_FIELD_OP: + + /* Offset is in bytes, field is one dword */ + + bit_offset = 8 * offset; + bit_count = 32; + field_flags = AML_FIELD_ACCESS_DWORD; + break; + + case AML_CREATE_QWORD_FIELD_OP: + + /* Offset is in bytes, field is one qword */ + + bit_offset = 8 * offset; + bit_count = 64; + field_flags = AML_FIELD_ACCESS_QWORD; + break; + + default: + + ACPI_ERROR((AE_INFO, + "Unknown field creation opcode %02x", aml_opcode)); + status = AE_AML_BAD_OPCODE; + goto cleanup; + } + + /* Entire field must fit within the current length of the buffer */ + + if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) { + ACPI_ERROR((AE_INFO, + "Field [%4.4s] at %d exceeds Buffer [%4.4s] size %d (bits)", + acpi_ut_get_node_name(result_desc), + bit_offset + bit_count, + acpi_ut_get_node_name(buffer_desc->buffer.node), + 8 * (u32) buffer_desc->buffer.length)); + status = AE_AML_BUFFER_LIMIT; + goto cleanup; + } + + /* + * Initialize areas of the field object that are common to all fields + * For field_flags, use LOCK_RULE = 0 (NO_LOCK), + * UPDATE_RULE = 0 (UPDATE_PRESERVE) + */ + status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0, + bit_offset, bit_count); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + obj_desc->buffer_field.buffer_obj = buffer_desc; + + /* Reference count for buffer_desc inherits obj_desc count */ + + buffer_desc->common.reference_count = (u16) + (buffer_desc->common.reference_count + + obj_desc->common.reference_count); + + cleanup: + + /* Always delete the operands */ + + acpi_ut_remove_reference(offset_desc); + acpi_ut_remove_reference(buffer_desc); + + if (aml_opcode == AML_CREATE_FIELD_OP) { + acpi_ut_remove_reference(length_desc); + } + + /* On failure, delete the result descriptor */ + + if (ACPI_FAILURE(status)) { + acpi_ut_remove_reference(result_desc); /* Result descriptor */ + } else { + /* Now the address and length are valid for this buffer_field */ + + obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID; + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_eval_buffer_field_operands + * + * PARAMETERS: walk_state - Current walk + * Op - A valid buffer_field Op object + * + * RETURN: Status + * + * DESCRIPTION: Get buffer_field Buffer and Index + * Called from acpi_ds_exec_end_op during buffer_field parse tree walk + * + ******************************************************************************/ + +acpi_status +acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state, + union acpi_parse_object *op) +{ + acpi_status status; + union acpi_operand_object *obj_desc; + struct acpi_namespace_node *node; + union acpi_parse_object *next_op; + + ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op); + + /* + * This is where we evaluate the address and length fields of the + * create_xxx_field declaration + */ + node = op->common.node; + + /* next_op points to the op that holds the Buffer */ + + next_op = op->common.value.arg; + + /* Evaluate/create the address and length operands */ + + status = acpi_ds_create_operands(walk_state, next_op); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + obj_desc = acpi_ns_get_attached_object(node); + if (!obj_desc) { + return_ACPI_STATUS(AE_NOT_EXIST); + } + + /* Resolve the operands */ + + status = acpi_ex_resolve_operands(op->common.aml_opcode, + ACPI_WALK_OPERANDS, walk_state); + if (ACPI_FAILURE(status)) { + ACPI_ERROR((AE_INFO, "(%s) bad operand(s) (%X)", + acpi_ps_get_opcode_name(op->common.aml_opcode), + status)); + + return_ACPI_STATUS(status); + } + + /* Initialize the Buffer Field */ + + if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { + + /* NOTE: Slightly different operands for this opcode */ + + status = + acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, + walk_state->operands[0], + walk_state->operands[1], + walk_state->operands[2], + walk_state->operands[3]); + } else { + /* All other, create_xxx_field opcodes */ + + status = + acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, + walk_state->operands[0], + walk_state->operands[1], NULL, + walk_state->operands[2]); + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_eval_region_operands + * + * PARAMETERS: walk_state - Current walk + * Op - A valid region Op object + * + * RETURN: Status + * + * DESCRIPTION: Get region address and length + * Called from acpi_ds_exec_end_op during op_region parse tree walk + * + ******************************************************************************/ + +acpi_status +acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state, + union acpi_parse_object *op) +{ + acpi_status status; + union acpi_operand_object *obj_desc; + union acpi_operand_object *operand_desc; + struct acpi_namespace_node *node; + union acpi_parse_object *next_op; + + ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op); + + /* + * This is where we evaluate the address and length fields of the + * op_region declaration + */ + node = op->common.node; + + /* next_op points to the op that holds the space_iD */ + + next_op = op->common.value.arg; + + /* next_op points to address op */ + + next_op = next_op->common.next; + + /* Evaluate/create the address and length operands */ + + status = acpi_ds_create_operands(walk_state, next_op); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Resolve the length and address operands to numbers */ + + status = acpi_ex_resolve_operands(op->common.aml_opcode, + ACPI_WALK_OPERANDS, walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + obj_desc = acpi_ns_get_attached_object(node); + if (!obj_desc) { + return_ACPI_STATUS(AE_NOT_EXIST); + } + + /* + * Get the length operand and save it + * (at Top of stack) + */ + operand_desc = walk_state->operands[walk_state->num_operands - 1]; + + obj_desc->region.length = (u32) operand_desc->integer.value; + acpi_ut_remove_reference(operand_desc); + + /* + * Get the address and save it + * (at top of stack - 1) + */ + operand_desc = walk_state->operands[walk_state->num_operands - 2]; + + obj_desc->region.address = (acpi_physical_address) + operand_desc->integer.value; + acpi_ut_remove_reference(operand_desc); + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n", + obj_desc, + ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address), + obj_desc->region.length)); + + /* Now the address and length are valid for this opregion */ + + obj_desc->region.flags |= AOPOBJ_DATA_VALID; + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_eval_table_region_operands + * + * PARAMETERS: walk_state - Current walk + * Op - A valid region Op object + * + * RETURN: Status + * + * DESCRIPTION: Get region address and length + * Called from acpi_ds_exec_end_op during data_table_region parse tree walk + * + ******************************************************************************/ + +acpi_status +acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state, + union acpi_parse_object *op) +{ + acpi_status status; + union acpi_operand_object *obj_desc; + union acpi_operand_object **operand; + struct acpi_namespace_node *node; + union acpi_parse_object *next_op; + u32 table_index; + struct acpi_table_header *table; + + ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op); + + /* + * This is where we evaluate the signature_string and oem_iDString + * and oem_table_iDString of the data_table_region declaration + */ + node = op->common.node; + + /* next_op points to signature_string op */ + + next_op = op->common.value.arg; + + /* + * Evaluate/create the signature_string and oem_iDString + * and oem_table_iDString operands + */ + status = acpi_ds_create_operands(walk_state, next_op); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* + * Resolve the signature_string and oem_iDString + * and oem_table_iDString operands + */ + status = acpi_ex_resolve_operands(op->common.aml_opcode, + ACPI_WALK_OPERANDS, walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + operand = &walk_state->operands[0]; + + /* Find the ACPI table */ + + status = acpi_tb_find_table(operand[0]->string.pointer, + operand[1]->string.pointer, + operand[2]->string.pointer, &table_index); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + acpi_ut_remove_reference(operand[0]); + acpi_ut_remove_reference(operand[1]); + acpi_ut_remove_reference(operand[2]); + + status = acpi_get_table_by_index(table_index, &table); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + obj_desc = acpi_ns_get_attached_object(node); + if (!obj_desc) { + return_ACPI_STATUS(AE_NOT_EXIST); + } + + obj_desc->region.address = + (acpi_physical_address) ACPI_TO_INTEGER(table); + obj_desc->region.length = table->length; + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n", + obj_desc, + ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address), + obj_desc->region.length)); + + /* Now the address and length are valid for this opregion */ + + obj_desc->region.flags |= AOPOBJ_DATA_VALID; + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_eval_data_object_operands + * + * PARAMETERS: walk_state - Current walk + * Op - A valid data_object Op object + * obj_desc - data_object + * + * RETURN: Status + * + * DESCRIPTION: Get the operands and complete the following data object types: + * Buffer, Package. + * + ******************************************************************************/ + +acpi_status +acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + union acpi_operand_object *obj_desc) +{ + acpi_status status; + union acpi_operand_object *arg_desc; + u32 length; + + ACPI_FUNCTION_TRACE(ds_eval_data_object_operands); + + /* The first operand (for all of these data objects) is the length */ + + /* + * Set proper index into operand stack for acpi_ds_obj_stack_push + * invoked inside acpi_ds_create_operand. + */ + walk_state->operand_index = walk_state->num_operands; + + status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + status = acpi_ex_resolve_operands(walk_state->opcode, + &(walk_state-> + operands[walk_state->num_operands - + 1]), walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Extract length operand */ + + arg_desc = walk_state->operands[walk_state->num_operands - 1]; + length = (u32) arg_desc->integer.value; + + /* Cleanup for length operand */ + + status = acpi_ds_obj_stack_pop(1, walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + acpi_ut_remove_reference(arg_desc); + + /* + * Create the actual data object + */ + switch (op->common.aml_opcode) { + case AML_BUFFER_OP: + + status = + acpi_ds_build_internal_buffer_obj(walk_state, op, length, + &obj_desc); + break; + + case AML_PACKAGE_OP: + case AML_VAR_PACKAGE_OP: + + status = + acpi_ds_build_internal_package_obj(walk_state, op, length, + &obj_desc); + break; + + default: + return_ACPI_STATUS(AE_AML_BAD_OPCODE); + } + + if (ACPI_SUCCESS(status)) { + /* + * Return the object in the walk_state, unless the parent is a package - + * in this case, the return object will be stored in the parse tree + * for the package. + */ + if ((!op->common.parent) || + ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) && + (op->common.parent->common.aml_opcode != + AML_VAR_PACKAGE_OP) + && (op->common.parent->common.aml_opcode != AML_NAME_OP))) { + walk_state->result_obj = obj_desc; + } + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_eval_bank_field_operands + * + * PARAMETERS: walk_state - Current walk + * Op - A valid bank_field Op object + * + * RETURN: Status + * + * DESCRIPTION: Get bank_field bank_value + * Called from acpi_ds_exec_end_op during bank_field parse tree walk + * + ******************************************************************************/ + +acpi_status +acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state, + union acpi_parse_object *op) +{ + acpi_status status; + union acpi_operand_object *obj_desc; + union acpi_operand_object *operand_desc; + struct acpi_namespace_node *node; + union acpi_parse_object *next_op; + union acpi_parse_object *arg; + + ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op); + + /* + * This is where we evaluate the bank_value field of the + * bank_field declaration + */ + + /* next_op points to the op that holds the Region */ + + next_op = op->common.value.arg; + + /* next_op points to the op that holds the Bank Register */ + + next_op = next_op->common.next; + + /* next_op points to the op that holds the Bank Value */ + + next_op = next_op->common.next; + + /* + * Set proper index into operand stack for acpi_ds_obj_stack_push + * invoked inside acpi_ds_create_operand. + * + * We use walk_state->Operands[0] to store the evaluated bank_value + */ + walk_state->operand_index = 0; + + status = acpi_ds_create_operand(walk_state, next_op, 0); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, + acpi_ps_get_opcode_name(op->common.aml_opcode), 1); + /* + * Get the bank_value operand and save it + * (at Top of stack) + */ + operand_desc = walk_state->operands[0]; + + /* Arg points to the start Bank Field */ + + arg = acpi_ps_get_arg(op, 4); + while (arg) { + + /* Ignore OFFSET and ACCESSAS terms here */ + + if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { + node = arg->common.node; + + obj_desc = acpi_ns_get_attached_object(node); + if (!obj_desc) { + return_ACPI_STATUS(AE_NOT_EXIST); + } + + obj_desc->bank_field.value = + (u32) operand_desc->integer.value; + } + + /* Move to next field in the list */ + + arg = arg->common.next; + } + + acpi_ut_remove_reference(operand_desc); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_exec_begin_control_op + * + * PARAMETERS: walk_list - The list that owns the walk stack + * Op - The control Op + * + * RETURN: Status + * + * DESCRIPTION: Handles all control ops encountered during control method + * execution. + * + ******************************************************************************/ + +acpi_status +acpi_ds_exec_begin_control_op(struct acpi_walk_state *walk_state, + union acpi_parse_object *op) +{ + acpi_status status = AE_OK; + union acpi_generic_state *control_state; + + ACPI_FUNCTION_NAME(ds_exec_begin_control_op); + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p Opcode=%2.2X State=%p\n", op, + op->common.aml_opcode, walk_state)); + + switch (op->common.aml_opcode) { + case AML_IF_OP: + case AML_WHILE_OP: + + /* + * IF/WHILE: Create a new control state to manage these + * constructs. We need to manage these as a stack, in order + * to handle nesting. + */ + control_state = acpi_ut_create_control_state(); + if (!control_state) { + status = AE_NO_MEMORY; + break; + } + /* + * Save a pointer to the predicate for multiple executions + * of a loop + */ + control_state->control.aml_predicate_start = + walk_state->parser_state.aml - 1; + control_state->control.package_end = + walk_state->parser_state.pkg_end; + control_state->control.opcode = op->common.aml_opcode; + + /* Push the control state on this walk's control stack */ + + acpi_ut_push_generic_state(&walk_state->control_state, + control_state); + break; + + case AML_ELSE_OP: + + /* Predicate is in the state object */ + /* If predicate is true, the IF was executed, ignore ELSE part */ + + if (walk_state->last_predicate) { + status = AE_CTRL_TRUE; + } + + break; + + case AML_RETURN_OP: + + break; + + default: + break; + } + + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_exec_end_control_op + * + * PARAMETERS: walk_list - The list that owns the walk stack + * Op - The control Op + * + * RETURN: Status + * + * DESCRIPTION: Handles all control ops encountered during control method + * execution. + * + ******************************************************************************/ + +acpi_status +acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state, + union acpi_parse_object * op) +{ + acpi_status status = AE_OK; + union acpi_generic_state *control_state; + + ACPI_FUNCTION_NAME(ds_exec_end_control_op); + + switch (op->common.aml_opcode) { + case AML_IF_OP: + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[IF_OP] Op=%p\n", op)); + + /* + * Save the result of the predicate in case there is an + * ELSE to come + */ + walk_state->last_predicate = + (u8) walk_state->control_state->common.value; + + /* + * Pop the control state that was created at the start + * of the IF and free it + */ + control_state = + acpi_ut_pop_generic_state(&walk_state->control_state); + acpi_ut_delete_generic_state(control_state); + break; + + case AML_ELSE_OP: + + break; + + case AML_WHILE_OP: + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", op)); + + if (walk_state->control_state->common.value) { + + /* Predicate was true, go back and evaluate it again! */ + + status = AE_CTRL_PENDING; + } + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "[WHILE_OP] termination! Op=%p\n", op)); + + /* Pop this control state and free it */ + + control_state = + acpi_ut_pop_generic_state(&walk_state->control_state); + + walk_state->aml_last_while = + control_state->control.aml_predicate_start; + acpi_ut_delete_generic_state(control_state); + break; + + case AML_RETURN_OP: + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "[RETURN_OP] Op=%p Arg=%p\n", op, + op->common.value.arg)); + + /* + * One optional operand -- the return value + * It can be either an immediate operand or a result that + * has been bubbled up the tree + */ + if (op->common.value.arg) { + + /* Since we have a real Return(), delete any implicit return */ + + acpi_ds_clear_implicit_return(walk_state); + + /* Return statement has an immediate operand */ + + status = + acpi_ds_create_operands(walk_state, + op->common.value.arg); + if (ACPI_FAILURE(status)) { + return (status); + } + + /* + * If value being returned is a Reference (such as + * an arg or local), resolve it now because it may + * cease to exist at the end of the method. + */ + status = + acpi_ex_resolve_to_value(&walk_state->operands[0], + walk_state); + if (ACPI_FAILURE(status)) { + return (status); + } + + /* + * Get the return value and save as the last result + * value. This is the only place where walk_state->return_desc + * is set to anything other than zero! + */ + walk_state->return_desc = walk_state->operands[0]; + } else if (walk_state->result_count) { + + /* Since we have a real Return(), delete any implicit return */ + + acpi_ds_clear_implicit_return(walk_state); + + /* + * The return value has come from a previous calculation. + * + * If value being returned is a Reference (such as + * an arg or local), resolve it now because it may + * cease to exist at the end of the method. + * + * Allow references created by the Index operator to return unchanged. + */ + if ((ACPI_GET_DESCRIPTOR_TYPE + (walk_state->results->results.obj_desc[0]) == + ACPI_DESC_TYPE_OPERAND) + && + (ACPI_GET_OBJECT_TYPE + (walk_state->results->results.obj_desc[0]) == + ACPI_TYPE_LOCAL_REFERENCE) + && ((walk_state->results->results.obj_desc[0])-> + reference.class != ACPI_REFCLASS_INDEX)) { + status = + acpi_ex_resolve_to_value(&walk_state-> + results->results. + obj_desc[0], + walk_state); + if (ACPI_FAILURE(status)) { + return (status); + } + } + + walk_state->return_desc = + walk_state->results->results.obj_desc[0]; + } else { + /* No return operand */ + + if (walk_state->num_operands) { + acpi_ut_remove_reference(walk_state-> + operands[0]); + } + + walk_state->operands[0] = NULL; + walk_state->num_operands = 0; + walk_state->return_desc = NULL; + } + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Completed RETURN_OP State=%p, RetVal=%p\n", + walk_state, walk_state->return_desc)); + + /* End the control method execution right now */ + + status = AE_CTRL_TERMINATE; + break; + + case AML_NOOP_OP: + + /* Just do nothing! */ + break; + + case AML_BREAK_POINT_OP: + + /* Call up to the OS service layer to handle this */ + + status = + acpi_os_signal(ACPI_SIGNAL_BREAKPOINT, + "Executed AML Breakpoint opcode"); + + /* If and when it returns, all done. */ + + break; + + case AML_BREAK_OP: + case AML_CONTINUE_OP: /* ACPI 2.0 */ + + /* Pop and delete control states until we find a while */ + + while (walk_state->control_state && + (walk_state->control_state->control.opcode != + AML_WHILE_OP)) { + control_state = + acpi_ut_pop_generic_state(&walk_state-> + control_state); + acpi_ut_delete_generic_state(control_state); + } + + /* No while found? */ + + if (!walk_state->control_state) { + return (AE_AML_NO_WHILE); + } + + /* Was: walk_state->aml_last_while = walk_state->control_state->Control.aml_predicate_start; */ + + walk_state->aml_last_while = + walk_state->control_state->control.package_end; + + /* Return status depending on opcode */ + + if (op->common.aml_opcode == AML_BREAK_OP) { + status = AE_CTRL_BREAK; + } else { + status = AE_CTRL_CONTINUE; + } + break; + + default: + + ACPI_ERROR((AE_INFO, "Unknown control opcode=%X Op=%p", + op->common.aml_opcode, op)); + + status = AE_AML_BAD_OPCODE; + break; + } + + return (status); +} diff --git a/drivers/acpi/dispatcher/dsutils.c b/drivers/acpi/dispatcher/dsutils.c new file mode 100644 index 0000000..b398982 --- /dev/null +++ b/drivers/acpi/dispatcher/dsutils.c @@ -0,0 +1,868 @@ +/******************************************************************************* + * + * Module Name: dsutils - Dispatcher utilities + * + ******************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/acparser.h> +#include <acpi/amlcode.h> +#include <acpi/acdispat.h> +#include <acpi/acinterp.h> +#include <acpi/acnamesp.h> +#include <acpi/acdebug.h> + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dsutils") + +/******************************************************************************* + * + * FUNCTION: acpi_ds_clear_implicit_return + * + * PARAMETERS: walk_state - Current State + * + * RETURN: None. + * + * DESCRIPTION: Clear and remove a reference on an implicit return value. Used + * to delete "stale" return values (if enabled, the return value + * from every operator is saved at least momentarily, in case the + * parent method exits.) + * + ******************************************************************************/ +void acpi_ds_clear_implicit_return(struct acpi_walk_state *walk_state) +{ + ACPI_FUNCTION_NAME(ds_clear_implicit_return); + + /* + * Slack must be enabled for this feature + */ + if (!acpi_gbl_enable_interpreter_slack) { + return; + } + + if (walk_state->implicit_return_obj) { + /* + * Delete any "stale" implicit return. However, in + * complex statements, the implicit return value can be + * bubbled up several levels. + */ + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Removing reference on stale implicit return obj %p\n", + walk_state->implicit_return_obj)); + + acpi_ut_remove_reference(walk_state->implicit_return_obj); + walk_state->implicit_return_obj = NULL; + } +} + +#ifndef ACPI_NO_METHOD_EXECUTION +/******************************************************************************* + * + * FUNCTION: acpi_ds_do_implicit_return + * + * PARAMETERS: return_desc - The return value + * walk_state - Current State + * add_reference - True if a reference should be added to the + * return object + * + * RETURN: TRUE if implicit return enabled, FALSE otherwise + * + * DESCRIPTION: Implements the optional "implicit return". We save the result + * of every ASL operator and control method invocation in case the + * parent method exit. Before storing a new return value, we + * delete the previous return value. + * + ******************************************************************************/ + +u8 +acpi_ds_do_implicit_return(union acpi_operand_object *return_desc, + struct acpi_walk_state *walk_state, u8 add_reference) +{ + ACPI_FUNCTION_NAME(ds_do_implicit_return); + + /* + * Slack must be enabled for this feature, and we must + * have a valid return object + */ + if ((!acpi_gbl_enable_interpreter_slack) || (!return_desc)) { + return (FALSE); + } + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Result %p will be implicitly returned; Prev=%p\n", + return_desc, walk_state->implicit_return_obj)); + + /* + * Delete any "stale" implicit return value first. However, in + * complex statements, the implicit return value can be + * bubbled up several levels, so we don't clear the value if it + * is the same as the return_desc. + */ + if (walk_state->implicit_return_obj) { + if (walk_state->implicit_return_obj == return_desc) { + return (TRUE); + } + acpi_ds_clear_implicit_return(walk_state); + } + + /* Save the implicit return value, add a reference if requested */ + + walk_state->implicit_return_obj = return_desc; + if (add_reference) { + acpi_ut_add_reference(return_desc); + } + + return (TRUE); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_is_result_used + * + * PARAMETERS: Op - Current Op + * walk_state - Current State + * + * RETURN: TRUE if result is used, FALSE otherwise + * + * DESCRIPTION: Check if a result object will be used by the parent + * + ******************************************************************************/ + +u8 +acpi_ds_is_result_used(union acpi_parse_object * op, + struct acpi_walk_state * walk_state) +{ + const struct acpi_opcode_info *parent_info; + + ACPI_FUNCTION_TRACE_PTR(ds_is_result_used, op); + + /* Must have both an Op and a Result Object */ + + if (!op) { + ACPI_ERROR((AE_INFO, "Null Op")); + return_UINT8(TRUE); + } + + /* + * We know that this operator is not a + * Return() operator (would not come here.) The following code is the + * optional support for a so-called "implicit return". Some AML code + * assumes that the last value of the method is "implicitly" returned + * to the caller. Just save the last result as the return value. + * NOTE: this is optional because the ASL language does not actually + * support this behavior. + */ + (void)acpi_ds_do_implicit_return(walk_state->result_obj, walk_state, + TRUE); + + /* + * Now determine if the parent will use the result + * + * If there is no parent, or the parent is a scope_op, we are executing + * at the method level. An executing method typically has no parent, + * since each method is parsed separately. A method invoked externally + * via execute_control_method has a scope_op as the parent. + */ + if ((!op->common.parent) || + (op->common.parent->common.aml_opcode == AML_SCOPE_OP)) { + + /* No parent, the return value cannot possibly be used */ + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "At Method level, result of [%s] not used\n", + acpi_ps_get_opcode_name(op->common. + aml_opcode))); + return_UINT8(FALSE); + } + + /* Get info on the parent. The root_op is AML_SCOPE */ + + parent_info = + acpi_ps_get_opcode_info(op->common.parent->common.aml_opcode); + if (parent_info->class == AML_CLASS_UNKNOWN) { + ACPI_ERROR((AE_INFO, "Unknown parent opcode Op=%p", op)); + return_UINT8(FALSE); + } + + /* + * Decide what to do with the result based on the parent. If + * the parent opcode will not use the result, delete the object. + * Otherwise leave it as is, it will be deleted when it is used + * as an operand later. + */ + switch (parent_info->class) { + case AML_CLASS_CONTROL: + + switch (op->common.parent->common.aml_opcode) { + case AML_RETURN_OP: + + /* Never delete the return value associated with a return opcode */ + + goto result_used; + + case AML_IF_OP: + case AML_WHILE_OP: + + /* + * If we are executing the predicate AND this is the predicate op, + * we will use the return value + */ + if ((walk_state->control_state->common.state == + ACPI_CONTROL_PREDICATE_EXECUTING) + && (walk_state->control_state->control. + predicate_op == op)) { + goto result_used; + } + break; + + default: + /* Ignore other control opcodes */ + break; + } + + /* The general control opcode returns no result */ + + goto result_not_used; + + case AML_CLASS_CREATE: + + /* + * These opcodes allow term_arg(s) as operands and therefore + * the operands can be method calls. The result is used. + */ + goto result_used; + + case AML_CLASS_NAMED_OBJECT: + + if ((op->common.parent->common.aml_opcode == AML_REGION_OP) || + (op->common.parent->common.aml_opcode == AML_DATA_REGION_OP) + || (op->common.parent->common.aml_opcode == AML_PACKAGE_OP) + || (op->common.parent->common.aml_opcode == + AML_VAR_PACKAGE_OP) + || (op->common.parent->common.aml_opcode == AML_BUFFER_OP) + || (op->common.parent->common.aml_opcode == + AML_INT_EVAL_SUBTREE_OP) + || (op->common.parent->common.aml_opcode == + AML_BANK_FIELD_OP)) { + /* + * These opcodes allow term_arg(s) as operands and therefore + * the operands can be method calls. The result is used. + */ + goto result_used; + } + + goto result_not_used; + + default: + + /* + * In all other cases. the parent will actually use the return + * object, so keep it. + */ + goto result_used; + } + + result_used: + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Result of [%s] used by Parent [%s] Op=%p\n", + acpi_ps_get_opcode_name(op->common.aml_opcode), + acpi_ps_get_opcode_name(op->common.parent->common. + aml_opcode), op)); + + return_UINT8(TRUE); + + result_not_used: + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Result of [%s] not used by Parent [%s] Op=%p\n", + acpi_ps_get_opcode_name(op->common.aml_opcode), + acpi_ps_get_opcode_name(op->common.parent->common. + aml_opcode), op)); + + return_UINT8(FALSE); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_delete_result_if_not_used + * + * PARAMETERS: Op - Current parse Op + * result_obj - Result of the operation + * walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Used after interpretation of an opcode. If there is an internal + * result descriptor, check if the parent opcode will actually use + * this result. If not, delete the result now so that it will + * not become orphaned. + * + ******************************************************************************/ + +void +acpi_ds_delete_result_if_not_used(union acpi_parse_object *op, + union acpi_operand_object *result_obj, + struct acpi_walk_state *walk_state) +{ + union acpi_operand_object *obj_desc; + acpi_status status; + + ACPI_FUNCTION_TRACE_PTR(ds_delete_result_if_not_used, result_obj); + + if (!op) { + ACPI_ERROR((AE_INFO, "Null Op")); + return_VOID; + } + + if (!result_obj) { + return_VOID; + } + + if (!acpi_ds_is_result_used(op, walk_state)) { + + /* Must pop the result stack (obj_desc should be equal to result_obj) */ + + status = acpi_ds_result_pop(&obj_desc, walk_state); + if (ACPI_SUCCESS(status)) { + acpi_ut_remove_reference(result_obj); + } + } + + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_resolve_operands + * + * PARAMETERS: walk_state - Current walk state with operands on stack + * + * RETURN: Status + * + * DESCRIPTION: Resolve all operands to their values. Used to prepare + * arguments to a control method invocation (a call from one + * method to another.) + * + ******************************************************************************/ + +acpi_status acpi_ds_resolve_operands(struct acpi_walk_state *walk_state) +{ + u32 i; + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE_PTR(ds_resolve_operands, walk_state); + + /* + * Attempt to resolve each of the valid operands + * Method arguments are passed by reference, not by value. This means + * that the actual objects are passed, not copies of the objects. + */ + for (i = 0; i < walk_state->num_operands; i++) { + status = + acpi_ex_resolve_to_value(&walk_state->operands[i], + walk_state); + if (ACPI_FAILURE(status)) { + break; + } + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_clear_operands + * + * PARAMETERS: walk_state - Current walk state with operands on stack + * + * RETURN: None + * + * DESCRIPTION: Clear all operands on the current walk state operand stack. + * + ******************************************************************************/ + +void acpi_ds_clear_operands(struct acpi_walk_state *walk_state) +{ + u32 i; + + ACPI_FUNCTION_TRACE_PTR(ds_clear_operands, walk_state); + + /* Remove a reference on each operand on the stack */ + + for (i = 0; i < walk_state->num_operands; i++) { + /* + * Remove a reference to all operands, including both + * "Arguments" and "Targets". + */ + acpi_ut_remove_reference(walk_state->operands[i]); + walk_state->operands[i] = NULL; + } + + walk_state->num_operands = 0; + return_VOID; +} +#endif + +/******************************************************************************* + * + * FUNCTION: acpi_ds_create_operand + * + * PARAMETERS: walk_state - Current walk state + * Arg - Parse object for the argument + * arg_index - Which argument (zero based) + * + * RETURN: Status + * + * DESCRIPTION: Translate a parse tree object that is an argument to an AML + * opcode to the equivalent interpreter object. This may include + * looking up a name or entering a new name into the internal + * namespace. + * + ******************************************************************************/ + +acpi_status +acpi_ds_create_operand(struct acpi_walk_state *walk_state, + union acpi_parse_object *arg, u32 arg_index) +{ + acpi_status status = AE_OK; + char *name_string; + u32 name_length; + union acpi_operand_object *obj_desc; + union acpi_parse_object *parent_op; + u16 opcode; + acpi_interpreter_mode interpreter_mode; + const struct acpi_opcode_info *op_info; + + ACPI_FUNCTION_TRACE_PTR(ds_create_operand, arg); + + /* A valid name must be looked up in the namespace */ + + if ((arg->common.aml_opcode == AML_INT_NAMEPATH_OP) && + (arg->common.value.string) && + !(arg->common.flags & ACPI_PARSEOP_IN_STACK)) { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Getting a name: Arg=%p\n", + arg)); + + /* Get the entire name string from the AML stream */ + + status = + acpi_ex_get_name_string(ACPI_TYPE_ANY, + arg->common.value.buffer, + &name_string, &name_length); + + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* All prefixes have been handled, and the name is in name_string */ + + /* + * Special handling for buffer_field declarations. This is a deferred + * opcode that unfortunately defines the field name as the last + * parameter instead of the first. We get here when we are performing + * the deferred execution, so the actual name of the field is already + * in the namespace. We don't want to attempt to look it up again + * because we may be executing in a different scope than where the + * actual opcode exists. + */ + if ((walk_state->deferred_node) && + (walk_state->deferred_node->type == ACPI_TYPE_BUFFER_FIELD) + && (arg_index == + (u32) ((walk_state->opcode == + AML_CREATE_FIELD_OP) ? 3 : 2))) { + obj_desc = + ACPI_CAST_PTR(union acpi_operand_object, + walk_state->deferred_node); + status = AE_OK; + } else { /* All other opcodes */ + + /* + * Differentiate between a namespace "create" operation + * versus a "lookup" operation (IMODE_LOAD_PASS2 vs. + * IMODE_EXECUTE) in order to support the creation of + * namespace objects during the execution of control methods. + */ + parent_op = arg->common.parent; + op_info = + acpi_ps_get_opcode_info(parent_op->common. + aml_opcode); + if ((op_info->flags & AML_NSNODE) + && (parent_op->common.aml_opcode != + AML_INT_METHODCALL_OP) + && (parent_op->common.aml_opcode != AML_REGION_OP) + && (parent_op->common.aml_opcode != + AML_INT_NAMEPATH_OP)) { + + /* Enter name into namespace if not found */ + + interpreter_mode = ACPI_IMODE_LOAD_PASS2; + } else { + /* Return a failure if name not found */ + + interpreter_mode = ACPI_IMODE_EXECUTE; + } + + status = + acpi_ns_lookup(walk_state->scope_info, name_string, + ACPI_TYPE_ANY, interpreter_mode, + ACPI_NS_SEARCH_PARENT | + ACPI_NS_DONT_OPEN_SCOPE, walk_state, + ACPI_CAST_INDIRECT_PTR(struct + acpi_namespace_node, + &obj_desc)); + /* + * The only case where we pass through (ignore) a NOT_FOUND + * error is for the cond_ref_of opcode. + */ + if (status == AE_NOT_FOUND) { + if (parent_op->common.aml_opcode == + AML_COND_REF_OF_OP) { + /* + * For the Conditional Reference op, it's OK if + * the name is not found; We just need a way to + * indicate this to the interpreter, set the + * object to the root + */ + obj_desc = ACPI_CAST_PTR(union + acpi_operand_object, + acpi_gbl_root_node); + status = AE_OK; + } else { + /* + * We just plain didn't find it -- which is a + * very serious error at this point + */ + status = AE_AML_NAME_NOT_FOUND; + } + } + + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE(name_string, status); + } + } + + /* Free the namestring created above */ + + ACPI_FREE(name_string); + + /* Check status from the lookup */ + + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Put the resulting object onto the current object stack */ + + status = acpi_ds_obj_stack_push(obj_desc, walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + ACPI_DEBUGGER_EXEC(acpi_db_display_argument_object + (obj_desc, walk_state)); + } else { + /* Check for null name case */ + + if ((arg->common.aml_opcode == AML_INT_NAMEPATH_OP) && + !(arg->common.flags & ACPI_PARSEOP_IN_STACK)) { + /* + * If the name is null, this means that this is an + * optional result parameter that was not specified + * in the original ASL. Create a Zero Constant for a + * placeholder. (Store to a constant is a Noop.) + */ + opcode = AML_ZERO_OP; /* Has no arguments! */ + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Null namepath: Arg=%p\n", arg)); + } else { + opcode = arg->common.aml_opcode; + } + + /* Get the object type of the argument */ + + op_info = acpi_ps_get_opcode_info(opcode); + if (op_info->object_type == ACPI_TYPE_INVALID) { + return_ACPI_STATUS(AE_NOT_IMPLEMENTED); + } + + if ((op_info->flags & AML_HAS_RETVAL) + || (arg->common.flags & ACPI_PARSEOP_IN_STACK)) { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Argument previously created, already stacked\n")); + + ACPI_DEBUGGER_EXEC(acpi_db_display_argument_object + (walk_state-> + operands[walk_state->num_operands - + 1], walk_state)); + + /* + * Use value that was already previously returned + * by the evaluation of this argument + */ + status = acpi_ds_result_pop(&obj_desc, walk_state); + if (ACPI_FAILURE(status)) { + /* + * Only error is underflow, and this indicates + * a missing or null operand! + */ + ACPI_EXCEPTION((AE_INFO, status, + "Missing or null operand")); + return_ACPI_STATUS(status); + } + } else { + /* Create an ACPI_INTERNAL_OBJECT for the argument */ + + obj_desc = + acpi_ut_create_internal_object(op_info-> + object_type); + if (!obj_desc) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Initialize the new object */ + + status = + acpi_ds_init_object_from_op(walk_state, arg, opcode, + &obj_desc); + if (ACPI_FAILURE(status)) { + acpi_ut_delete_object_desc(obj_desc); + return_ACPI_STATUS(status); + } + } + + /* Put the operand object on the object stack */ + + status = acpi_ds_obj_stack_push(obj_desc, walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + ACPI_DEBUGGER_EXEC(acpi_db_display_argument_object + (obj_desc, walk_state)); + } + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_create_operands + * + * PARAMETERS: walk_state - Current state + * first_arg - First argument of a parser argument tree + * + * RETURN: Status + * + * DESCRIPTION: Convert an operator's arguments from a parse tree format to + * namespace objects and place those argument object on the object + * stack in preparation for evaluation by the interpreter. + * + ******************************************************************************/ + +acpi_status +acpi_ds_create_operands(struct acpi_walk_state *walk_state, + union acpi_parse_object *first_arg) +{ + acpi_status status = AE_OK; + union acpi_parse_object *arg; + union acpi_parse_object *arguments[ACPI_OBJ_NUM_OPERANDS]; + u32 arg_count = 0; + u32 index = walk_state->num_operands; + u32 i; + + ACPI_FUNCTION_TRACE_PTR(ds_create_operands, first_arg); + + /* Get all arguments in the list */ + + arg = first_arg; + while (arg) { + if (index >= ACPI_OBJ_NUM_OPERANDS) { + return_ACPI_STATUS(AE_BAD_DATA); + } + + arguments[index] = arg; + walk_state->operands[index] = NULL; + + /* Move on to next argument, if any */ + + arg = arg->common.next; + arg_count++; + index++; + } + + index--; + + /* It is the appropriate order to get objects from the Result stack */ + + for (i = 0; i < arg_count; i++) { + arg = arguments[index]; + + /* Force the filling of the operand stack in inverse order */ + + walk_state->operand_index = (u8) index; + + status = acpi_ds_create_operand(walk_state, arg, index); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + index--; + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Arg #%d (%p) done, Arg1=%p\n", index, arg, + first_arg)); + } + + return_ACPI_STATUS(status); + + cleanup: + /* + * We must undo everything done above; meaning that we must + * pop everything off of the operand stack and delete those + * objects + */ + acpi_ds_obj_stack_pop_and_delete(arg_count, walk_state); + + ACPI_EXCEPTION((AE_INFO, status, "While creating Arg %d", index)); + return_ACPI_STATUS(status); +} + +/***************************************************************************** + * + * FUNCTION: acpi_ds_evaluate_name_path + * + * PARAMETERS: walk_state - Current state of the parse tree walk, + * the opcode of current operation should be + * AML_INT_NAMEPATH_OP + * + * RETURN: Status + * + * DESCRIPTION: Translate the -name_path- parse tree object to the equivalent + * interpreter object, convert it to value, if needed, duplicate + * it, if needed, and push it onto the current result stack. + * + ****************************************************************************/ + +acpi_status acpi_ds_evaluate_name_path(struct acpi_walk_state *walk_state) +{ + acpi_status status = AE_OK; + union acpi_parse_object *op = walk_state->op; + union acpi_operand_object **operand = &walk_state->operands[0]; + union acpi_operand_object *new_obj_desc; + u8 type; + + ACPI_FUNCTION_TRACE_PTR(ds_evaluate_name_path, walk_state); + + if (!op->common.parent) { + + /* This happens after certain exception processing */ + + goto exit; + } + + if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) || + (op->common.parent->common.aml_opcode == AML_VAR_PACKAGE_OP) || + (op->common.parent->common.aml_opcode == AML_REF_OF_OP)) { + + /* TBD: Should we specify this feature as a bit of op_info->Flags of these opcodes? */ + + goto exit; + } + + status = acpi_ds_create_operand(walk_state, op, 0); + if (ACPI_FAILURE(status)) { + goto exit; + } + + if (op->common.flags & ACPI_PARSEOP_TARGET) { + new_obj_desc = *operand; + goto push_result; + } + + type = ACPI_GET_OBJECT_TYPE(*operand); + + status = acpi_ex_resolve_to_value(operand, walk_state); + if (ACPI_FAILURE(status)) { + goto exit; + } + + if (type == ACPI_TYPE_INTEGER) { + + /* It was incremented by acpi_ex_resolve_to_value */ + + acpi_ut_remove_reference(*operand); + + status = + acpi_ut_copy_iobject_to_iobject(*operand, &new_obj_desc, + walk_state); + if (ACPI_FAILURE(status)) { + goto exit; + } + } else { + /* + * The object either was anew created or is + * a Namespace node - don't decrement it. + */ + new_obj_desc = *operand; + } + + /* Cleanup for name-path operand */ + + status = acpi_ds_obj_stack_pop(1, walk_state); + if (ACPI_FAILURE(status)) { + walk_state->result_obj = new_obj_desc; + goto exit; + } + + push_result: + + walk_state->result_obj = new_obj_desc; + + status = acpi_ds_result_push(walk_state->result_obj, walk_state); + if (ACPI_SUCCESS(status)) { + + /* Force to take it from stack */ + + op->common.flags |= ACPI_PARSEOP_IN_STACK; + } + + exit: + + return_ACPI_STATUS(status); +} diff --git a/drivers/acpi/dispatcher/dswexec.c b/drivers/acpi/dispatcher/dswexec.c new file mode 100644 index 0000000..396fe12 --- /dev/null +++ b/drivers/acpi/dispatcher/dswexec.c @@ -0,0 +1,745 @@ +/****************************************************************************** + * + * Module Name: dswexec - Dispatcher method execution callbacks; + * dispatch to interpreter. + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/acparser.h> +#include <acpi/amlcode.h> +#include <acpi/acdispat.h> +#include <acpi/acinterp.h> +#include <acpi/acnamesp.h> +#include <acpi/acdebug.h> + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dswexec") + +/* + * Dispatch table for opcode classes + */ +static ACPI_EXECUTE_OP acpi_gbl_op_type_dispatch[] = { + acpi_ex_opcode_0A_0T_1R, + acpi_ex_opcode_1A_0T_0R, + acpi_ex_opcode_1A_0T_1R, + acpi_ex_opcode_1A_1T_0R, + acpi_ex_opcode_1A_1T_1R, + acpi_ex_opcode_2A_0T_0R, + acpi_ex_opcode_2A_0T_1R, + acpi_ex_opcode_2A_1T_1R, + acpi_ex_opcode_2A_2T_1R, + acpi_ex_opcode_3A_0T_0R, + acpi_ex_opcode_3A_1T_1R, + acpi_ex_opcode_6A_0T_1R +}; + +/***************************************************************************** + * + * FUNCTION: acpi_ds_get_predicate_value + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * result_obj - if non-zero, pop result from result stack + * + * RETURN: Status + * + * DESCRIPTION: Get the result of a predicate evaluation + * + ****************************************************************************/ + +acpi_status +acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state, + union acpi_operand_object *result_obj) +{ + acpi_status status = AE_OK; + union acpi_operand_object *obj_desc; + union acpi_operand_object *local_obj_desc = NULL; + + ACPI_FUNCTION_TRACE_PTR(ds_get_predicate_value, walk_state); + + walk_state->control_state->common.state = 0; + + if (result_obj) { + status = acpi_ds_result_pop(&obj_desc, walk_state); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, + "Could not get result from predicate evaluation")); + + return_ACPI_STATUS(status); + } + } else { + status = acpi_ds_create_operand(walk_state, walk_state->op, 0); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + status = + acpi_ex_resolve_to_value(&walk_state->operands[0], + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + obj_desc = walk_state->operands[0]; + } + + if (!obj_desc) { + ACPI_ERROR((AE_INFO, + "No predicate ObjDesc=%p State=%p", + obj_desc, walk_state)); + + return_ACPI_STATUS(AE_AML_NO_OPERAND); + } + + /* + * Result of predicate evaluation must be an Integer + * object. Implicitly convert the argument if necessary. + */ + status = acpi_ex_convert_to_integer(obj_desc, &local_obj_desc, 16); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + if (ACPI_GET_OBJECT_TYPE(local_obj_desc) != ACPI_TYPE_INTEGER) { + ACPI_ERROR((AE_INFO, + "Bad predicate (not an integer) ObjDesc=%p State=%p Type=%X", + obj_desc, walk_state, + ACPI_GET_OBJECT_TYPE(obj_desc))); + + status = AE_AML_OPERAND_TYPE; + goto cleanup; + } + + /* Truncate the predicate to 32-bits if necessary */ + + acpi_ex_truncate_for32bit_table(local_obj_desc); + + /* + * Save the result of the predicate evaluation on + * the control stack + */ + if (local_obj_desc->integer.value) { + walk_state->control_state->common.value = TRUE; + } else { + /* + * Predicate is FALSE, we will just toss the + * rest of the package + */ + walk_state->control_state->common.value = FALSE; + status = AE_CTRL_FALSE; + } + + /* Predicate can be used for an implicit return value */ + + (void)acpi_ds_do_implicit_return(local_obj_desc, walk_state, TRUE); + + cleanup: + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n", + walk_state->control_state->common.value, + walk_state->op)); + + /* Break to debugger to display result */ + + ACPI_DEBUGGER_EXEC(acpi_db_display_result_object + (local_obj_desc, walk_state)); + + /* + * Delete the predicate result object (we know that + * we don't need it anymore) + */ + if (local_obj_desc != obj_desc) { + acpi_ut_remove_reference(local_obj_desc); + } + acpi_ut_remove_reference(obj_desc); + + walk_state->control_state->common.state = ACPI_CONTROL_NORMAL; + return_ACPI_STATUS(status); +} + +/***************************************************************************** + * + * FUNCTION: acpi_ds_exec_begin_op + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * out_op - Where to return op if a new one is created + * + * RETURN: Status + * + * DESCRIPTION: Descending callback used during the execution of control + * methods. This is where most operators and operands are + * dispatched to the interpreter. + * + ****************************************************************************/ + +acpi_status +acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state, + union acpi_parse_object **out_op) +{ + union acpi_parse_object *op; + acpi_status status = AE_OK; + u32 opcode_class; + + ACPI_FUNCTION_TRACE_PTR(ds_exec_begin_op, walk_state); + + op = walk_state->op; + if (!op) { + status = acpi_ds_load2_begin_op(walk_state, out_op); + if (ACPI_FAILURE(status)) { + goto error_exit; + } + + op = *out_op; + walk_state->op = op; + walk_state->opcode = op->common.aml_opcode; + walk_state->op_info = + acpi_ps_get_opcode_info(op->common.aml_opcode); + + if (acpi_ns_opens_scope(walk_state->op_info->object_type)) { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "(%s) Popping scope for Op %p\n", + acpi_ut_get_type_name(walk_state-> + op_info-> + object_type), + op)); + + status = acpi_ds_scope_stack_pop(walk_state); + if (ACPI_FAILURE(status)) { + goto error_exit; + } + } + } + + if (op == walk_state->origin) { + if (out_op) { + *out_op = op; + } + + return_ACPI_STATUS(AE_OK); + } + + /* + * If the previous opcode was a conditional, this opcode + * must be the beginning of the associated predicate. + * Save this knowledge in the current scope descriptor + */ + if ((walk_state->control_state) && + (walk_state->control_state->common.state == + ACPI_CONTROL_CONDITIONAL_EXECUTING)) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Exec predicate Op=%p State=%p\n", op, + walk_state)); + + walk_state->control_state->common.state = + ACPI_CONTROL_PREDICATE_EXECUTING; + + /* Save start of predicate */ + + walk_state->control_state->control.predicate_op = op; + } + + opcode_class = walk_state->op_info->class; + + /* We want to send namepaths to the load code */ + + if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { + opcode_class = AML_CLASS_NAMED_OBJECT; + } + + /* + * Handle the opcode based upon the opcode type + */ + switch (opcode_class) { + case AML_CLASS_CONTROL: + + status = acpi_ds_exec_begin_control_op(walk_state, op); + break; + + case AML_CLASS_NAMED_OBJECT: + + if (walk_state->walk_type & ACPI_WALK_METHOD) { + /* + * Found a named object declaration during method execution; + * we must enter this object into the namespace. The created + * object is temporary and will be deleted upon completion of + * the execution of this method. + */ + status = acpi_ds_load2_begin_op(walk_state, NULL); + } + + break; + + case AML_CLASS_EXECUTE: + case AML_CLASS_CREATE: + + break; + + default: + break; + } + + /* Nothing to do here during method execution */ + + return_ACPI_STATUS(status); + + error_exit: + status = acpi_ds_method_error(status, walk_state); + return_ACPI_STATUS(status); +} + +/***************************************************************************** + * + * FUNCTION: acpi_ds_exec_end_op + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * + * RETURN: Status + * + * DESCRIPTION: Ascending callback used during the execution of control + * methods. The only thing we really need to do here is to + * notice the beginning of IF, ELSE, and WHILE blocks. + * + ****************************************************************************/ + +acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state) +{ + union acpi_parse_object *op; + acpi_status status = AE_OK; + u32 op_type; + u32 op_class; + union acpi_parse_object *next_op; + union acpi_parse_object *first_arg; + + ACPI_FUNCTION_TRACE_PTR(ds_exec_end_op, walk_state); + + op = walk_state->op; + op_type = walk_state->op_info->type; + op_class = walk_state->op_info->class; + + if (op_class == AML_CLASS_UNKNOWN) { + ACPI_ERROR((AE_INFO, "Unknown opcode %X", + op->common.aml_opcode)); + return_ACPI_STATUS(AE_NOT_IMPLEMENTED); + } + + first_arg = op->common.value.arg; + + /* Init the walk state */ + + walk_state->num_operands = 0; + walk_state->operand_index = 0; + walk_state->return_desc = NULL; + walk_state->result_obj = NULL; + + /* Call debugger for single step support (DEBUG build only) */ + + ACPI_DEBUGGER_EXEC(status = + acpi_db_single_step(walk_state, op, op_class)); + ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status);} + ) ; + + /* Decode the Opcode Class */ + + switch (op_class) { + case AML_CLASS_ARGUMENT: /* Constants, literals, etc. */ + + if (walk_state->opcode == AML_INT_NAMEPATH_OP) { + status = acpi_ds_evaluate_name_path(walk_state); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + } + break; + + case AML_CLASS_EXECUTE: /* Most operators with arguments */ + + /* Build resolved operand stack */ + + status = acpi_ds_create_operands(walk_state, first_arg); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + /* + * All opcodes require operand resolution, with the only exceptions + * being the object_type and size_of operators. + */ + if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) { + + /* Resolve all operands */ + + status = acpi_ex_resolve_operands(walk_state->opcode, + &(walk_state-> + operands + [walk_state-> + num_operands - 1]), + walk_state); + } + + if (ACPI_SUCCESS(status)) { + /* + * Dispatch the request to the appropriate interpreter handler + * routine. There is one routine per opcode "type" based upon the + * number of opcode arguments and return type. + */ + status = + acpi_gbl_op_type_dispatch[op_type] (walk_state); + } else { + /* + * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the + * Local is uninitialized. + */ + if ((status == AE_AML_UNINITIALIZED_LOCAL) && + (walk_state->opcode == AML_STORE_OP) && + (walk_state->operands[0]->common.type == + ACPI_TYPE_LOCAL_REFERENCE) + && (walk_state->operands[1]->common.type == + ACPI_TYPE_LOCAL_REFERENCE) + && (walk_state->operands[0]->reference.class == + walk_state->operands[1]->reference.class) + && (walk_state->operands[0]->reference.value == + walk_state->operands[1]->reference.value)) { + status = AE_OK; + } else { + ACPI_EXCEPTION((AE_INFO, status, + "While resolving operands for [%s]", + acpi_ps_get_opcode_name + (walk_state->opcode))); + } + } + + /* Always delete the argument objects and clear the operand stack */ + + acpi_ds_clear_operands(walk_state); + + /* + * If a result object was returned from above, push it on the + * current result stack + */ + if (ACPI_SUCCESS(status) && walk_state->result_obj) { + status = + acpi_ds_result_push(walk_state->result_obj, + walk_state); + } + break; + + default: + + switch (op_type) { + case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */ + + /* 1 Operand, 0 external_result, 0 internal_result */ + + status = acpi_ds_exec_end_control_op(walk_state, op); + + break; + + case AML_TYPE_METHOD_CALL: + + /* + * If the method is referenced from within a package + * declaration, it is not a invocation of the method, just + * a reference to it. + */ + if ((op->asl.parent) && + ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP) + || (op->asl.parent->asl.aml_opcode == + AML_VAR_PACKAGE_OP))) { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Method Reference in a Package, Op=%p\n", + op)); + + op->common.node = + (struct acpi_namespace_node *)op->asl.value. + arg->asl.node; + acpi_ut_add_reference(op->asl.value.arg->asl. + node->object); + return_ACPI_STATUS(AE_OK); + } + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Method invocation, Op=%p\n", op)); + + /* + * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains + * the method Node pointer + */ + /* next_op points to the op that holds the method name */ + + next_op = first_arg; + + /* next_op points to first argument op */ + + next_op = next_op->common.next; + + /* + * Get the method's arguments and put them on the operand stack + */ + status = acpi_ds_create_operands(walk_state, next_op); + if (ACPI_FAILURE(status)) { + break; + } + + /* + * Since the operands will be passed to another control method, + * we must resolve all local references here (Local variables, + * arguments to *this* method, etc.) + */ + status = acpi_ds_resolve_operands(walk_state); + if (ACPI_FAILURE(status)) { + + /* On error, clear all resolved operands */ + + acpi_ds_clear_operands(walk_state); + break; + } + + /* + * Tell the walk loop to preempt this running method and + * execute the new method + */ + status = AE_CTRL_TRANSFER; + + /* + * Return now; we don't want to disturb anything, + * especially the operand count! + */ + return_ACPI_STATUS(status); + + case AML_TYPE_CREATE_FIELD: + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Executing CreateField Buffer/Index Op=%p\n", + op)); + + status = acpi_ds_load2_end_op(walk_state); + if (ACPI_FAILURE(status)) { + break; + } + + status = + acpi_ds_eval_buffer_field_operands(walk_state, op); + break; + + case AML_TYPE_CREATE_OBJECT: + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Executing CreateObject (Buffer/Package) Op=%p\n", + op)); + + switch (op->common.parent->common.aml_opcode) { + case AML_NAME_OP: + + /* + * Put the Node on the object stack (Contains the ACPI Name + * of this object) + */ + walk_state->operands[0] = + (void *)op->common.parent->common.node; + walk_state->num_operands = 1; + + status = acpi_ds_create_node(walk_state, + op->common.parent-> + common.node, + op->common.parent); + if (ACPI_FAILURE(status)) { + break; + } + + /* Fall through */ + /*lint -fallthrough */ + + case AML_INT_EVAL_SUBTREE_OP: + + status = + acpi_ds_eval_data_object_operands + (walk_state, op, + acpi_ns_get_attached_object(op->common. + parent->common. + node)); + break; + + default: + + status = + acpi_ds_eval_data_object_operands + (walk_state, op, NULL); + break; + } + + /* + * If a result object was returned from above, push it on the + * current result stack + */ + if (walk_state->result_obj) { + status = + acpi_ds_result_push(walk_state->result_obj, + walk_state); + } + break; + + case AML_TYPE_NAMED_FIELD: + case AML_TYPE_NAMED_COMPLEX: + case AML_TYPE_NAMED_SIMPLE: + case AML_TYPE_NAMED_NO_OBJ: + + status = acpi_ds_load2_end_op(walk_state); + if (ACPI_FAILURE(status)) { + break; + } + + if (op->common.aml_opcode == AML_REGION_OP) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Executing OpRegion Address/Length Op=%p\n", + op)); + + status = + acpi_ds_eval_region_operands(walk_state, + op); + if (ACPI_FAILURE(status)) { + break; + } + } else if (op->common.aml_opcode == AML_DATA_REGION_OP) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Executing DataTableRegion Strings Op=%p\n", + op)); + + status = + acpi_ds_eval_table_region_operands + (walk_state, op); + if (ACPI_FAILURE(status)) { + break; + } + } else if (op->common.aml_opcode == AML_BANK_FIELD_OP) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Executing BankField Op=%p\n", + op)); + + status = + acpi_ds_eval_bank_field_operands(walk_state, + op); + if (ACPI_FAILURE(status)) { + break; + } + } + break; + + case AML_TYPE_UNDEFINED: + + ACPI_ERROR((AE_INFO, + "Undefined opcode type Op=%p", op)); + return_ACPI_STATUS(AE_NOT_IMPLEMENTED); + + case AML_TYPE_BOGUS: + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Internal opcode=%X type Op=%p\n", + walk_state->opcode, op)); + break; + + default: + + ACPI_ERROR((AE_INFO, + "Unimplemented opcode, class=%X type=%X Opcode=%X Op=%p", + op_class, op_type, op->common.aml_opcode, + op)); + + status = AE_NOT_IMPLEMENTED; + break; + } + } + + /* + * ACPI 2.0 support for 64-bit integers: Truncate numeric + * result value if we are executing from a 32-bit ACPI table + */ + acpi_ex_truncate_for32bit_table(walk_state->result_obj); + + /* + * Check if we just completed the evaluation of a + * conditional predicate + */ + if ((ACPI_SUCCESS(status)) && + (walk_state->control_state) && + (walk_state->control_state->common.state == + ACPI_CONTROL_PREDICATE_EXECUTING) && + (walk_state->control_state->control.predicate_op == op)) { + status = + acpi_ds_get_predicate_value(walk_state, + walk_state->result_obj); + walk_state->result_obj = NULL; + } + + cleanup: + + if (walk_state->result_obj) { + + /* Break to debugger to display result */ + + ACPI_DEBUGGER_EXEC(acpi_db_display_result_object + (walk_state->result_obj, walk_state)); + + /* + * Delete the result op if and only if: + * Parent will not use the result -- such as any + * non-nested type2 op in a method (parent will be method) + */ + acpi_ds_delete_result_if_not_used(op, walk_state->result_obj, + walk_state); + } +#ifdef _UNDER_DEVELOPMENT + + if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) { + acpi_db_method_end(walk_state); + } +#endif + + /* Invoke exception handler on error */ + + if (ACPI_FAILURE(status)) { + status = acpi_ds_method_error(status, walk_state); + } + + /* Always clear the object stack */ + + walk_state->num_operands = 0; + return_ACPI_STATUS(status); +} diff --git a/drivers/acpi/dispatcher/dswload.c b/drivers/acpi/dispatcher/dswload.c new file mode 100644 index 0000000..dff7a3e --- /dev/null +++ b/drivers/acpi/dispatcher/dswload.c @@ -0,0 +1,1202 @@ +/****************************************************************************** + * + * Module Name: dswload - Dispatcher namespace load callbacks + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/acparser.h> +#include <acpi/amlcode.h> +#include <acpi/acdispat.h> +#include <acpi/acinterp.h> +#include <acpi/acnamesp.h> +#include <acpi/acevents.h> + +#ifdef ACPI_ASL_COMPILER +#include <acpi/acdisasm.h> +#endif + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dswload") + +/******************************************************************************* + * + * FUNCTION: acpi_ds_init_callbacks + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * pass_number - 1, 2, or 3 + * + * RETURN: Status + * + * DESCRIPTION: Init walk state callbacks + * + ******************************************************************************/ +acpi_status +acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number) +{ + + switch (pass_number) { + case 1: + walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | + ACPI_PARSE_DELETE_TREE; + walk_state->descending_callback = acpi_ds_load1_begin_op; + walk_state->ascending_callback = acpi_ds_load1_end_op; + break; + + case 2: + walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 | + ACPI_PARSE_DELETE_TREE; + walk_state->descending_callback = acpi_ds_load2_begin_op; + walk_state->ascending_callback = acpi_ds_load2_end_op; + break; + + case 3: +#ifndef ACPI_NO_METHOD_EXECUTION + walk_state->parse_flags |= ACPI_PARSE_EXECUTE | + ACPI_PARSE_DELETE_TREE; + walk_state->descending_callback = acpi_ds_exec_begin_op; + walk_state->ascending_callback = acpi_ds_exec_end_op; +#endif + break; + + default: + return (AE_BAD_PARAMETER); + } + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_load1_begin_op + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * out_op - Where to return op if a new one is created + * + * RETURN: Status + * + * DESCRIPTION: Descending callback used during the loading of ACPI tables. + * + ******************************************************************************/ + +acpi_status +acpi_ds_load1_begin_op(struct acpi_walk_state * walk_state, + union acpi_parse_object ** out_op) +{ + union acpi_parse_object *op; + struct acpi_namespace_node *node; + acpi_status status; + acpi_object_type object_type; + char *path; + u32 flags; + + ACPI_FUNCTION_TRACE(ds_load1_begin_op); + + op = walk_state->op; + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, + walk_state)); + + /* We are only interested in opcodes that have an associated name */ + + if (op) { + if (!(walk_state->op_info->flags & AML_NAMED)) { + *out_op = op; + return_ACPI_STATUS(AE_OK); + } + + /* Check if this object has already been installed in the namespace */ + + if (op->common.node) { + *out_op = op; + return_ACPI_STATUS(AE_OK); + } + } + + path = acpi_ps_get_next_namestring(&walk_state->parser_state); + + /* Map the raw opcode into an internal object type */ + + object_type = walk_state->op_info->object_type; + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "State=%p Op=%p [%s]\n", walk_state, op, + acpi_ut_get_type_name(object_type))); + + switch (walk_state->opcode) { + case AML_SCOPE_OP: + + /* + * The target name of the Scope() operator must exist at this point so + * that we can actually open the scope to enter new names underneath it. + * Allow search-to-root for single namesegs. + */ + status = + acpi_ns_lookup(walk_state->scope_info, path, object_type, + ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, + walk_state, &(node)); +#ifdef ACPI_ASL_COMPILER + if (status == AE_NOT_FOUND) { + /* + * Table disassembly: + * Target of Scope() not found. Generate an External for it, and + * insert the name into the namespace. + */ + acpi_dm_add_to_external_list(path, ACPI_TYPE_DEVICE, 0); + status = + acpi_ns_lookup(walk_state->scope_info, path, + object_type, ACPI_IMODE_LOAD_PASS1, + ACPI_NS_SEARCH_PARENT, walk_state, + &node); + } +#endif + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE(path, status); + return_ACPI_STATUS(status); + } + + /* + * Check to make sure that the target is + * one of the opcodes that actually opens a scope + */ + switch (node->type) { + case ACPI_TYPE_ANY: + case ACPI_TYPE_LOCAL_SCOPE: /* Scope */ + case ACPI_TYPE_DEVICE: + case ACPI_TYPE_POWER: + case ACPI_TYPE_PROCESSOR: + case ACPI_TYPE_THERMAL: + + /* These are acceptable types */ + break; + + case ACPI_TYPE_INTEGER: + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + + /* + * These types we will allow, but we will change the type. This + * enables some existing code of the form: + * + * Name (DEB, 0) + * Scope (DEB) { ... } + * + * Note: silently change the type here. On the second pass, we will report + * a warning + */ + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n", + path, + acpi_ut_get_type_name(node->type))); + + node->type = ACPI_TYPE_ANY; + walk_state->scope_info->common.value = ACPI_TYPE_ANY; + break; + + default: + + /* All other types are an error */ + + ACPI_ERROR((AE_INFO, + "Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)", + acpi_ut_get_type_name(node->type), path)); + + return_ACPI_STATUS(AE_AML_OPERAND_TYPE); + } + break; + + default: + /* + * For all other named opcodes, we will enter the name into + * the namespace. + * + * Setup the search flags. + * Since we are entering a name into the namespace, we do not want to + * enable the search-to-root upsearch. + * + * There are only two conditions where it is acceptable that the name + * already exists: + * 1) the Scope() operator can reopen a scoping object that was + * previously defined (Scope, Method, Device, etc.) + * 2) Whenever we are parsing a deferred opcode (op_region, Buffer, + * buffer_field, or Package), the name of the object is already + * in the namespace. + */ + if (walk_state->deferred_node) { + + /* This name is already in the namespace, get the node */ + + node = walk_state->deferred_node; + status = AE_OK; + break; + } + + /* + * If we are executing a method, do not create any namespace objects + * during the load phase, only during execution. + */ + if (walk_state->method_node) { + node = NULL; + status = AE_OK; + break; + } + + flags = ACPI_NS_NO_UPSEARCH; + if ((walk_state->opcode != AML_SCOPE_OP) && + (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) { + flags |= ACPI_NS_ERROR_IF_FOUND; + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "[%s] Cannot already exist\n", + acpi_ut_get_type_name(object_type))); + } else { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "[%s] Both Find or Create allowed\n", + acpi_ut_get_type_name(object_type))); + } + + /* + * Enter the named type into the internal namespace. We enter the name + * as we go downward in the parse tree. Any necessary subobjects that + * involve arguments to the opcode must be created as we go back up the + * parse tree later. + */ + status = + acpi_ns_lookup(walk_state->scope_info, path, object_type, + ACPI_IMODE_LOAD_PASS1, flags, walk_state, + &node); + if (ACPI_FAILURE(status)) { + if (status == AE_ALREADY_EXISTS) { + + /* The name already exists in this scope */ + + if (node->flags & ANOBJ_IS_EXTERNAL) { + /* + * Allow one create on an object or segment that was + * previously declared External + */ + node->flags &= ~ANOBJ_IS_EXTERNAL; + node->type = (u8) object_type; + + /* Just retyped a node, probably will need to open a scope */ + + if (acpi_ns_opens_scope(object_type)) { + status = + acpi_ds_scope_stack_push + (node, object_type, + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS + (status); + } + } + + status = AE_OK; + } + } + + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE(path, status); + return_ACPI_STATUS(status); + } + } + break; + } + + /* Common exit */ + + if (!op) { + + /* Create a new op */ + + op = acpi_ps_alloc_op(walk_state->opcode); + if (!op) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + } + + /* Initialize the op */ + +#if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)) + op->named.path = ACPI_CAST_PTR(u8, path); +#endif + + if (node) { + /* + * Put the Node in the "op" object that the parser uses, so we + * can get it again quickly when this scope is closed + */ + op->common.node = node; + op->named.name = node->name.integer; + } + + acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state), + op); + *out_op = op; + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_load1_end_op + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * + * RETURN: Status + * + * DESCRIPTION: Ascending callback used during the loading of the namespace, + * both control methods and everything else. + * + ******************************************************************************/ + +acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state) +{ + union acpi_parse_object *op; + acpi_object_type object_type; + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE(ds_load1_end_op); + + op = walk_state->op; + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, + walk_state)); + + /* We are only interested in opcodes that have an associated name */ + + if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) { + return_ACPI_STATUS(AE_OK); + } + + /* Get the object type to determine if we should pop the scope */ + + object_type = walk_state->op_info->object_type; + +#ifndef ACPI_NO_METHOD_EXECUTION + if (walk_state->op_info->flags & AML_FIELD) { + /* + * If we are executing a method, do not create any namespace objects + * during the load phase, only during execution. + */ + if (!walk_state->method_node) { + if (walk_state->opcode == AML_FIELD_OP || + walk_state->opcode == AML_BANK_FIELD_OP || + walk_state->opcode == AML_INDEX_FIELD_OP) { + status = + acpi_ds_init_field_objects(op, walk_state); + } + } + return_ACPI_STATUS(status); + } + + /* + * If we are executing a method, do not create any namespace objects + * during the load phase, only during execution. + */ + if (!walk_state->method_node) { + if (op->common.aml_opcode == AML_REGION_OP) { + status = + acpi_ex_create_region(op->named.data, + op->named.length, + (acpi_adr_space_type) ((op-> + common. + value. + arg)-> + common. + value. + integer), + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } else if (op->common.aml_opcode == AML_DATA_REGION_OP) { + status = + acpi_ex_create_region(op->named.data, + op->named.length, + REGION_DATA_TABLE, + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + } +#endif + + if (op->common.aml_opcode == AML_NAME_OP) { + + /* For Name opcode, get the object type from the argument */ + + if (op->common.value.arg) { + object_type = (acpi_ps_get_opcode_info((op->common. + value.arg)-> + common. + aml_opcode))-> + object_type; + + /* Set node type if we have a namespace node */ + + if (op->common.node) { + op->common.node->type = (u8) object_type; + } + } + } + + /* + * If we are executing a method, do not create any namespace objects + * during the load phase, only during execution. + */ + if (!walk_state->method_node) { + if (op->common.aml_opcode == AML_METHOD_OP) { + /* + * method_op pkg_length name_string method_flags term_list + * + * Note: We must create the method node/object pair as soon as we + * see the method declaration. This allows later pass1 parsing + * of invocations of the method (need to know the number of + * arguments.) + */ + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "LOADING-Method: State=%p Op=%p NamedObj=%p\n", + walk_state, op, op->named.node)); + + if (!acpi_ns_get_attached_object(op->named.node)) { + walk_state->operands[0] = + ACPI_CAST_PTR(void, op->named.node); + walk_state->num_operands = 1; + + status = + acpi_ds_create_operands(walk_state, + op->common.value. + arg); + if (ACPI_SUCCESS(status)) { + status = + acpi_ex_create_method(op->named. + data, + op->named. + length, + walk_state); + } + + walk_state->operands[0] = NULL; + walk_state->num_operands = 0; + + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + } + } + + /* Pop the scope stack (only if loading a table) */ + + if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "(%s): Popping scope for Op %p\n", + acpi_ut_get_type_name(object_type), op)); + + status = acpi_ds_scope_stack_pop(walk_state); + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_load2_begin_op + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * out_op - Wher to return op if a new one is created + * + * RETURN: Status + * + * DESCRIPTION: Descending callback used during the loading of ACPI tables. + * + ******************************************************************************/ + +acpi_status +acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state, + union acpi_parse_object **out_op) +{ + union acpi_parse_object *op; + struct acpi_namespace_node *node; + acpi_status status; + acpi_object_type object_type; + char *buffer_ptr; + u32 flags; + + ACPI_FUNCTION_TRACE(ds_load2_begin_op); + + op = walk_state->op; + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op, + walk_state)); + + if (op) { + if ((walk_state->control_state) && + (walk_state->control_state->common.state == + ACPI_CONTROL_CONDITIONAL_EXECUTING)) { + + /* We are executing a while loop outside of a method */ + + status = acpi_ds_exec_begin_op(walk_state, out_op); + return_ACPI_STATUS(status); + } + + /* We only care about Namespace opcodes here */ + + if ((!(walk_state->op_info->flags & AML_NSOPCODE) && + (walk_state->opcode != AML_INT_NAMEPATH_OP)) || + (!(walk_state->op_info->flags & AML_NAMED))) { +#ifdef ACPI_ENABLE_MODULE_LEVEL_CODE + if ((walk_state->op_info->class == AML_CLASS_EXECUTE) || + (walk_state->op_info->class == AML_CLASS_CONTROL)) { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Begin/EXEC: %s (fl %8.8X)\n", + walk_state->op_info->name, + walk_state->op_info->flags)); + + /* Executing a type1 or type2 opcode outside of a method */ + + status = + acpi_ds_exec_begin_op(walk_state, out_op); + return_ACPI_STATUS(status); + } +#endif + return_ACPI_STATUS(AE_OK); + } + + /* Get the name we are going to enter or lookup in the namespace */ + + if (walk_state->opcode == AML_INT_NAMEPATH_OP) { + + /* For Namepath op, get the path string */ + + buffer_ptr = op->common.value.string; + if (!buffer_ptr) { + + /* No name, just exit */ + + return_ACPI_STATUS(AE_OK); + } + } else { + /* Get name from the op */ + + buffer_ptr = ACPI_CAST_PTR(char, &op->named.name); + } + } else { + /* Get the namestring from the raw AML */ + + buffer_ptr = + acpi_ps_get_next_namestring(&walk_state->parser_state); + } + + /* Map the opcode into an internal object type */ + + object_type = walk_state->op_info->object_type; + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "State=%p Op=%p Type=%X\n", walk_state, op, + object_type)); + + switch (walk_state->opcode) { + case AML_FIELD_OP: + case AML_BANK_FIELD_OP: + case AML_INDEX_FIELD_OP: + + node = NULL; + status = AE_OK; + break; + + case AML_INT_NAMEPATH_OP: + /* + * The name_path is an object reference to an existing object. + * Don't enter the name into the namespace, but look it up + * for use later. + */ + status = + acpi_ns_lookup(walk_state->scope_info, buffer_ptr, + object_type, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT, walk_state, &(node)); + break; + + case AML_SCOPE_OP: + /* + * The Path is an object reference to an existing object. + * Don't enter the name into the namespace, but look it up + * for use later. + */ + status = + acpi_ns_lookup(walk_state->scope_info, buffer_ptr, + object_type, ACPI_IMODE_EXECUTE, + ACPI_NS_SEARCH_PARENT, walk_state, &(node)); + if (ACPI_FAILURE(status)) { +#ifdef ACPI_ASL_COMPILER + if (status == AE_NOT_FOUND) { + status = AE_OK; + } else { + ACPI_ERROR_NAMESPACE(buffer_ptr, status); + } +#else + ACPI_ERROR_NAMESPACE(buffer_ptr, status); +#endif + return_ACPI_STATUS(status); + } + + /* + * We must check to make sure that the target is + * one of the opcodes that actually opens a scope + */ + switch (node->type) { + case ACPI_TYPE_ANY: + case ACPI_TYPE_LOCAL_SCOPE: /* Scope */ + case ACPI_TYPE_DEVICE: + case ACPI_TYPE_POWER: + case ACPI_TYPE_PROCESSOR: + case ACPI_TYPE_THERMAL: + + /* These are acceptable types */ + break; + + case ACPI_TYPE_INTEGER: + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + + /* + * These types we will allow, but we will change the type. This + * enables some existing code of the form: + * + * Name (DEB, 0) + * Scope (DEB) { ... } + */ + ACPI_WARNING((AE_INFO, + "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)", + buffer_ptr, + acpi_ut_get_type_name(node->type))); + + node->type = ACPI_TYPE_ANY; + walk_state->scope_info->common.value = ACPI_TYPE_ANY; + break; + + default: + + /* All other types are an error */ + + ACPI_ERROR((AE_INFO, + "Invalid type (%s) for target of Scope operator [%4.4s]", + acpi_ut_get_type_name(node->type), + buffer_ptr)); + + return (AE_AML_OPERAND_TYPE); + } + break; + + default: + + /* All other opcodes */ + + if (op && op->common.node) { + + /* This op/node was previously entered into the namespace */ + + node = op->common.node; + + if (acpi_ns_opens_scope(object_type)) { + status = + acpi_ds_scope_stack_push(node, object_type, + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + + return_ACPI_STATUS(AE_OK); + } + + /* + * Enter the named type into the internal namespace. We enter the name + * as we go downward in the parse tree. Any necessary subobjects that + * involve arguments to the opcode must be created as we go back up the + * parse tree later. + * + * Note: Name may already exist if we are executing a deferred opcode. + */ + if (walk_state->deferred_node) { + + /* This name is already in the namespace, get the node */ + + node = walk_state->deferred_node; + status = AE_OK; + break; + } + + flags = ACPI_NS_NO_UPSEARCH; + if (walk_state->pass_number == ACPI_IMODE_EXECUTE) { + + /* Execution mode, node cannot already exist, node is temporary */ + + flags |= (ACPI_NS_ERROR_IF_FOUND | ACPI_NS_TEMPORARY); + } + + /* Add new entry or lookup existing entry */ + + status = + acpi_ns_lookup(walk_state->scope_info, buffer_ptr, + object_type, ACPI_IMODE_LOAD_PASS2, flags, + walk_state, &node); + + if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "***New Node [%4.4s] %p is temporary\n", + acpi_ut_get_node_name(node), node)); + } + break; + } + + if (ACPI_FAILURE(status)) { + ACPI_ERROR_NAMESPACE(buffer_ptr, status); + return_ACPI_STATUS(status); + } + + if (!op) { + + /* Create a new op */ + + op = acpi_ps_alloc_op(walk_state->opcode); + if (!op) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Initialize the new op */ + + if (node) { + op->named.name = node->name.integer; + } + *out_op = op; + } + + /* + * Put the Node in the "op" object that the parser uses, so we + * can get it again quickly when this scope is closed + */ + op->common.node = node; + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_load2_end_op + * + * PARAMETERS: walk_state - Current state of the parse tree walk + * + * RETURN: Status + * + * DESCRIPTION: Ascending callback used during the loading of the namespace, + * both control methods and everything else. + * + ******************************************************************************/ + +acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state) +{ + union acpi_parse_object *op; + acpi_status status = AE_OK; + acpi_object_type object_type; + struct acpi_namespace_node *node; + union acpi_parse_object *arg; + struct acpi_namespace_node *new_node; +#ifndef ACPI_NO_METHOD_EXECUTION + u32 i; + u8 region_space; +#endif + + ACPI_FUNCTION_TRACE(ds_load2_end_op); + + op = walk_state->op; + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n", + walk_state->op_info->name, op, walk_state)); + + /* Check if opcode had an associated namespace object */ + + if (!(walk_state->op_info->flags & AML_NSOBJECT)) { +#ifndef ACPI_NO_METHOD_EXECUTION +#ifdef ACPI_ENABLE_MODULE_LEVEL_CODE + /* No namespace object. Executable opcode? */ + + if ((walk_state->op_info->class == AML_CLASS_EXECUTE) || + (walk_state->op_info->class == AML_CLASS_CONTROL)) { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "End/EXEC: %s (fl %8.8X)\n", + walk_state->op_info->name, + walk_state->op_info->flags)); + + /* Executing a type1 or type2 opcode outside of a method */ + + status = acpi_ds_exec_end_op(walk_state); + return_ACPI_STATUS(status); + } +#endif +#endif + return_ACPI_STATUS(AE_OK); + } + + if (op->common.aml_opcode == AML_SCOPE_OP) { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Ending scope Op=%p State=%p\n", op, + walk_state)); + } + + object_type = walk_state->op_info->object_type; + + /* + * Get the Node/name from the earlier lookup + * (It was saved in the *op structure) + */ + node = op->common.node; + + /* + * Put the Node on the object stack (Contains the ACPI Name of + * this object) + */ + walk_state->operands[0] = (void *)node; + walk_state->num_operands = 1; + + /* Pop the scope stack */ + + if (acpi_ns_opens_scope(object_type) && + (op->common.aml_opcode != AML_INT_METHODCALL_OP)) { + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "(%s) Popping scope for Op %p\n", + acpi_ut_get_type_name(object_type), op)); + + status = acpi_ds_scope_stack_pop(walk_state); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + } + + /* + * Named operations are as follows: + * + * AML_ALIAS + * AML_BANKFIELD + * AML_CREATEBITFIELD + * AML_CREATEBYTEFIELD + * AML_CREATEDWORDFIELD + * AML_CREATEFIELD + * AML_CREATEQWORDFIELD + * AML_CREATEWORDFIELD + * AML_DATA_REGION + * AML_DEVICE + * AML_EVENT + * AML_FIELD + * AML_INDEXFIELD + * AML_METHOD + * AML_METHODCALL + * AML_MUTEX + * AML_NAME + * AML_NAMEDFIELD + * AML_OPREGION + * AML_POWERRES + * AML_PROCESSOR + * AML_SCOPE + * AML_THERMALZONE + */ + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "Create-Load [%s] State=%p Op=%p NamedObj=%p\n", + acpi_ps_get_opcode_name(op->common.aml_opcode), + walk_state, op, node)); + + /* Decode the opcode */ + + arg = op->common.value.arg; + + switch (walk_state->op_info->type) { +#ifndef ACPI_NO_METHOD_EXECUTION + + case AML_TYPE_CREATE_FIELD: + /* + * Create the field object, but the field buffer and index must + * be evaluated later during the execution phase + */ + status = acpi_ds_create_buffer_field(op, walk_state); + break; + + case AML_TYPE_NAMED_FIELD: + /* + * If we are executing a method, initialize the field + */ + if (walk_state->method_node) { + status = acpi_ds_init_field_objects(op, walk_state); + } + + switch (op->common.aml_opcode) { + case AML_INDEX_FIELD_OP: + + status = + acpi_ds_create_index_field(op, + (acpi_handle) arg-> + common.node, walk_state); + break; + + case AML_BANK_FIELD_OP: + + status = + acpi_ds_create_bank_field(op, arg->common.node, + walk_state); + break; + + case AML_FIELD_OP: + + status = + acpi_ds_create_field(op, arg->common.node, + walk_state); + break; + + default: + /* All NAMED_FIELD opcodes must be handled above */ + break; + } + break; + + case AML_TYPE_NAMED_SIMPLE: + + status = acpi_ds_create_operands(walk_state, arg); + if (ACPI_FAILURE(status)) { + goto cleanup; + } + + switch (op->common.aml_opcode) { + case AML_PROCESSOR_OP: + + status = acpi_ex_create_processor(walk_state); + break; + + case AML_POWER_RES_OP: + + status = acpi_ex_create_power_resource(walk_state); + break; + + case AML_MUTEX_OP: + + status = acpi_ex_create_mutex(walk_state); + break; + + case AML_EVENT_OP: + + status = acpi_ex_create_event(walk_state); + break; + + case AML_ALIAS_OP: + + status = acpi_ex_create_alias(walk_state); + break; + + default: + /* Unknown opcode */ + + status = AE_OK; + goto cleanup; + } + + /* Delete operands */ + + for (i = 1; i < walk_state->num_operands; i++) { + acpi_ut_remove_reference(walk_state->operands[i]); + walk_state->operands[i] = NULL; + } + + break; +#endif /* ACPI_NO_METHOD_EXECUTION */ + + case AML_TYPE_NAMED_COMPLEX: + + switch (op->common.aml_opcode) { +#ifndef ACPI_NO_METHOD_EXECUTION + case AML_REGION_OP: + case AML_DATA_REGION_OP: + + if (op->common.aml_opcode == AML_REGION_OP) { + region_space = (acpi_adr_space_type) + ((op->common.value.arg)->common.value. + integer); + } else { + region_space = REGION_DATA_TABLE; + } + + /* + * If we are executing a method, initialize the region + */ + if (walk_state->method_node) { + status = + acpi_ex_create_region(op->named.data, + op->named.length, + region_space, + walk_state); + if (ACPI_FAILURE(status)) { + return (status); + } + } + + /* + * The op_region is not fully parsed at this time. Only valid + * argument is the space_id. (We must save the address of the + * AML of the address and length operands) + */ + + /* + * If we have a valid region, initialize it + * Namespace is NOT locked at this point. + */ + status = + acpi_ev_initialize_region + (acpi_ns_get_attached_object(node), FALSE); + if (ACPI_FAILURE(status)) { + /* + * If AE_NOT_EXIST is returned, it is not fatal + * because many regions get created before a handler + * is installed for said region. + */ + if (AE_NOT_EXIST == status) { + status = AE_OK; + } + } + break; + + case AML_NAME_OP: + + status = acpi_ds_create_node(walk_state, node, op); + break; + + case AML_METHOD_OP: + /* + * method_op pkg_length name_string method_flags term_list + * + * Note: We must create the method node/object pair as soon as we + * see the method declaration. This allows later pass1 parsing + * of invocations of the method (need to know the number of + * arguments.) + */ + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "LOADING-Method: State=%p Op=%p NamedObj=%p\n", + walk_state, op, op->named.node)); + + if (!acpi_ns_get_attached_object(op->named.node)) { + walk_state->operands[0] = + ACPI_CAST_PTR(void, op->named.node); + walk_state->num_operands = 1; + + status = + acpi_ds_create_operands(walk_state, + op->common.value. + arg); + if (ACPI_SUCCESS(status)) { + status = + acpi_ex_create_method(op->named. + data, + op->named. + length, + walk_state); + } + walk_state->operands[0] = NULL; + walk_state->num_operands = 0; + + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + break; + +#endif /* ACPI_NO_METHOD_EXECUTION */ + + default: + /* All NAMED_COMPLEX opcodes must be handled above */ + break; + } + break; + + case AML_CLASS_INTERNAL: + + /* case AML_INT_NAMEPATH_OP: */ + break; + + case AML_CLASS_METHOD_CALL: + + ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, + "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n", + walk_state, op, node)); + + /* + * Lookup the method name and save the Node + */ + status = + acpi_ns_lookup(walk_state->scope_info, + arg->common.value.string, ACPI_TYPE_ANY, + ACPI_IMODE_LOAD_PASS2, + ACPI_NS_SEARCH_PARENT | + ACPI_NS_DONT_OPEN_SCOPE, walk_state, + &(new_node)); + if (ACPI_SUCCESS(status)) { + /* + * Make sure that what we found is indeed a method + * We didn't search for a method on purpose, to see if the name + * would resolve + */ + if (new_node->type != ACPI_TYPE_METHOD) { + status = AE_AML_OPERAND_TYPE; + } + + /* We could put the returned object (Node) on the object stack for + * later, but for now, we will put it in the "op" object that the + * parser uses, so we can get it again at the end of this scope + */ + op->common.node = new_node; + } else { + ACPI_ERROR_NAMESPACE(arg->common.value.string, status); + } + break; + + default: + break; + } + + cleanup: + + /* Remove the Node pushed at the very beginning */ + + walk_state->operands[0] = NULL; + walk_state->num_operands = 0; + return_ACPI_STATUS(status); +} diff --git a/drivers/acpi/dispatcher/dswscope.c b/drivers/acpi/dispatcher/dswscope.c new file mode 100644 index 0000000..9e60732 --- /dev/null +++ b/drivers/acpi/dispatcher/dswscope.c @@ -0,0 +1,213 @@ +/****************************************************************************** + * + * Module Name: dswscope - Scope stack manipulation + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/acdispat.h> + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dswscope") + +/**************************************************************************** + * + * FUNCTION: acpi_ds_scope_stack_clear + * + * PARAMETERS: walk_state - Current state + * + * RETURN: None + * + * DESCRIPTION: Pop (and free) everything on the scope stack except the + * root scope object (which remains at the stack top.) + * + ***************************************************************************/ +void acpi_ds_scope_stack_clear(struct acpi_walk_state *walk_state) +{ + union acpi_generic_state *scope_info; + + ACPI_FUNCTION_NAME(ds_scope_stack_clear); + + while (walk_state->scope_info) { + + /* Pop a scope off the stack */ + + scope_info = walk_state->scope_info; + walk_state->scope_info = scope_info->scope.next; + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Popped object type (%s)\n", + acpi_ut_get_type_name(scope_info->common. + value))); + acpi_ut_delete_generic_state(scope_info); + } +} + +/**************************************************************************** + * + * FUNCTION: acpi_ds_scope_stack_push + * + * PARAMETERS: Node - Name to be made current + * Type - Type of frame being pushed + * walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Push the current scope on the scope stack, and make the + * passed Node current. + * + ***************************************************************************/ + +acpi_status +acpi_ds_scope_stack_push(struct acpi_namespace_node *node, + acpi_object_type type, + struct acpi_walk_state *walk_state) +{ + union acpi_generic_state *scope_info; + union acpi_generic_state *old_scope_info; + + ACPI_FUNCTION_TRACE(ds_scope_stack_push); + + if (!node) { + + /* Invalid scope */ + + ACPI_ERROR((AE_INFO, "Null scope parameter")); + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* Make sure object type is valid */ + + if (!acpi_ut_valid_object_type(type)) { + ACPI_WARNING((AE_INFO, "Invalid object type: 0x%X", type)); + } + + /* Allocate a new scope object */ + + scope_info = acpi_ut_create_generic_state(); + if (!scope_info) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Init new scope object */ + + scope_info->common.descriptor_type = ACPI_DESC_TYPE_STATE_WSCOPE; + scope_info->scope.node = node; + scope_info->common.value = (u16) type; + + walk_state->scope_depth++; + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "[%.2d] Pushed scope ", + (u32) walk_state->scope_depth)); + + old_scope_info = walk_state->scope_info; + if (old_scope_info) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, + "[%4.4s] (%s)", + acpi_ut_get_node_name(old_scope_info-> + scope.node), + acpi_ut_get_type_name(old_scope_info-> + common.value))); + } else { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (%s)", "ROOT")); + } + + ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, + ", New scope -> [%4.4s] (%s)\n", + acpi_ut_get_node_name(scope_info->scope.node), + acpi_ut_get_type_name(scope_info->common.value))); + + /* Push new scope object onto stack */ + + acpi_ut_push_generic_state(&walk_state->scope_info, scope_info); + return_ACPI_STATUS(AE_OK); +} + +/**************************************************************************** + * + * FUNCTION: acpi_ds_scope_stack_pop + * + * PARAMETERS: walk_state - Current state + * + * RETURN: Status + * + * DESCRIPTION: Pop the scope stack once. + * + ***************************************************************************/ + +acpi_status acpi_ds_scope_stack_pop(struct acpi_walk_state *walk_state) +{ + union acpi_generic_state *scope_info; + union acpi_generic_state *new_scope_info; + + ACPI_FUNCTION_TRACE(ds_scope_stack_pop); + + /* + * Pop scope info object off the stack. + */ + scope_info = acpi_ut_pop_generic_state(&walk_state->scope_info); + if (!scope_info) { + return_ACPI_STATUS(AE_STACK_UNDERFLOW); + } + + walk_state->scope_depth--; + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "[%.2d] Popped scope [%4.4s] (%s), New scope -> ", + (u32) walk_state->scope_depth, + acpi_ut_get_node_name(scope_info->scope.node), + acpi_ut_get_type_name(scope_info->common.value))); + + new_scope_info = walk_state->scope_info; + if (new_scope_info) { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, + "[%4.4s] (%s)\n", + acpi_ut_get_node_name(new_scope_info-> + scope.node), + acpi_ut_get_type_name(new_scope_info-> + common.value))); + } else { + ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "[\\___] (ROOT)\n")); + } + + acpi_ut_delete_generic_state(scope_info); + return_ACPI_STATUS(AE_OK); +} diff --git a/drivers/acpi/dispatcher/dswstate.c b/drivers/acpi/dispatcher/dswstate.c new file mode 100644 index 0000000..b00d4af --- /dev/null +++ b/drivers/acpi/dispatcher/dswstate.c @@ -0,0 +1,752 @@ +/****************************************************************************** + * + * Module Name: dswstate - Dispatcher parse tree walk management routines + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2008, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <acpi/acpi.h> +#include <acpi/acparser.h> +#include <acpi/acdispat.h> +#include <acpi/acnamesp.h> + +#define _COMPONENT ACPI_DISPATCHER +ACPI_MODULE_NAME("dswstate") + + /* Local prototypes */ +static acpi_status acpi_ds_result_stack_push(struct acpi_walk_state *ws); +static acpi_status acpi_ds_result_stack_pop(struct acpi_walk_state *ws); + +/******************************************************************************* + * + * FUNCTION: acpi_ds_result_pop + * + * PARAMETERS: Object - Where to return the popped object + * walk_state - Current Walk state + * + * RETURN: Status + * + * DESCRIPTION: Pop an object off the top of this walk's result stack + * + ******************************************************************************/ + +acpi_status +acpi_ds_result_pop(union acpi_operand_object **object, + struct acpi_walk_state *walk_state) +{ + u32 index; + union acpi_generic_state *state; + acpi_status status; + + ACPI_FUNCTION_NAME(ds_result_pop); + + state = walk_state->results; + + /* Incorrect state of result stack */ + + if (state && !walk_state->result_count) { + ACPI_ERROR((AE_INFO, "No results on result stack")); + return (AE_AML_INTERNAL); + } + + if (!state && walk_state->result_count) { + ACPI_ERROR((AE_INFO, "No result state for result stack")); + return (AE_AML_INTERNAL); + } + + /* Empty result stack */ + + if (!state) { + ACPI_ERROR((AE_INFO, "Result stack is empty! State=%p", + walk_state)); + return (AE_AML_NO_RETURN_VALUE); + } + + /* Return object of the top element and clean that top element result stack */ + + walk_state->result_count--; + index = walk_state->result_count % ACPI_RESULTS_FRAME_OBJ_NUM; + + *object = state->results.obj_desc[index]; + if (!*object) { + ACPI_ERROR((AE_INFO, + "No result objects on result stack, State=%p", + walk_state)); + return (AE_AML_NO_RETURN_VALUE); + } + + state->results.obj_desc[index] = NULL; + if (index == 0) { + status = acpi_ds_result_stack_pop(walk_state); + if (ACPI_FAILURE(status)) { + return (status); + } + } + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Obj=%p [%s] Index=%X State=%p Num=%X\n", *object, + acpi_ut_get_object_type_name(*object), + index, walk_state, walk_state->result_count)); + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_result_push + * + * PARAMETERS: Object - Where to return the popped object + * walk_state - Current Walk state + * + * RETURN: Status + * + * DESCRIPTION: Push an object onto the current result stack + * + ******************************************************************************/ + +acpi_status +acpi_ds_result_push(union acpi_operand_object * object, + struct acpi_walk_state * walk_state) +{ + union acpi_generic_state *state; + acpi_status status; + u32 index; + + ACPI_FUNCTION_NAME(ds_result_push); + + if (walk_state->result_count > walk_state->result_size) { + ACPI_ERROR((AE_INFO, "Result stack is full")); + return (AE_AML_INTERNAL); + } else if (walk_state->result_count == walk_state->result_size) { + + /* Extend the result stack */ + + status = acpi_ds_result_stack_push(walk_state); + if (ACPI_FAILURE(status)) { + ACPI_ERROR((AE_INFO, + "Failed to extend the result stack")); + return (status); + } + } + + if (!(walk_state->result_count < walk_state->result_size)) { + ACPI_ERROR((AE_INFO, "No free elements in result stack")); + return (AE_AML_INTERNAL); + } + + state = walk_state->results; + if (!state) { + ACPI_ERROR((AE_INFO, "No result stack frame during push")); + return (AE_AML_INTERNAL); + } + + if (!object) { + ACPI_ERROR((AE_INFO, + "Null Object! Obj=%p State=%p Num=%X", + object, walk_state, walk_state->result_count)); + return (AE_BAD_PARAMETER); + } + + /* Assign the address of object to the top free element of result stack */ + + index = walk_state->result_count % ACPI_RESULTS_FRAME_OBJ_NUM; + state->results.obj_desc[index] = object; + walk_state->result_count++; + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Obj=%p [%s] State=%p Num=%X Cur=%X\n", + object, + acpi_ut_get_object_type_name((union + acpi_operand_object *) + object), walk_state, + walk_state->result_count, + walk_state->current_result)); + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_result_stack_push + * + * PARAMETERS: walk_state - Current Walk state + * + * RETURN: Status + * + * DESCRIPTION: Push an object onto the walk_state result stack + * + ******************************************************************************/ + +static acpi_status acpi_ds_result_stack_push(struct acpi_walk_state *walk_state) +{ + union acpi_generic_state *state; + + ACPI_FUNCTION_NAME(ds_result_stack_push); + + /* Check for stack overflow */ + + if (((u32) walk_state->result_size + ACPI_RESULTS_FRAME_OBJ_NUM) > + ACPI_RESULTS_OBJ_NUM_MAX) { + ACPI_ERROR((AE_INFO, "Result stack overflow: State=%p Num=%X", + walk_state, walk_state->result_size)); + return (AE_STACK_OVERFLOW); + } + + state = acpi_ut_create_generic_state(); + if (!state) { + return (AE_NO_MEMORY); + } + + state->common.descriptor_type = ACPI_DESC_TYPE_STATE_RESULT; + acpi_ut_push_generic_state(&walk_state->results, state); + + /* Increase the length of the result stack by the length of frame */ + + walk_state->result_size += ACPI_RESULTS_FRAME_OBJ_NUM; + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Results=%p State=%p\n", + state, walk_state)); + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_result_stack_pop + * + * PARAMETERS: walk_state - Current Walk state + * + * RETURN: Status + * + * DESCRIPTION: Pop an object off of the walk_state result stack + * + ******************************************************************************/ + +static acpi_status acpi_ds_result_stack_pop(struct acpi_walk_state *walk_state) +{ + union acpi_generic_state *state; + + ACPI_FUNCTION_NAME(ds_result_stack_pop); + + /* Check for stack underflow */ + + if (walk_state->results == NULL) { + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Result stack underflow - State=%p\n", + walk_state)); + return (AE_AML_NO_OPERAND); + } + + if (walk_state->result_size < ACPI_RESULTS_FRAME_OBJ_NUM) { + ACPI_ERROR((AE_INFO, "Insufficient result stack size")); + return (AE_AML_INTERNAL); + } + + state = acpi_ut_pop_generic_state(&walk_state->results); + acpi_ut_delete_generic_state(state); + + /* Decrease the length of result stack by the length of frame */ + + walk_state->result_size -= ACPI_RESULTS_FRAME_OBJ_NUM; + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Result=%p RemainingResults=%X State=%p\n", + state, walk_state->result_count, walk_state)); + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_obj_stack_push + * + * PARAMETERS: Object - Object to push + * walk_state - Current Walk state + * + * RETURN: Status + * + * DESCRIPTION: Push an object onto this walk's object/operand stack + * + ******************************************************************************/ + +acpi_status +acpi_ds_obj_stack_push(void *object, struct acpi_walk_state * walk_state) +{ + ACPI_FUNCTION_NAME(ds_obj_stack_push); + + /* Check for stack overflow */ + + if (walk_state->num_operands >= ACPI_OBJ_NUM_OPERANDS) { + ACPI_ERROR((AE_INFO, + "Object stack overflow! Obj=%p State=%p #Ops=%X", + object, walk_state, walk_state->num_operands)); + return (AE_STACK_OVERFLOW); + } + + /* Put the object onto the stack */ + + walk_state->operands[walk_state->operand_index] = object; + walk_state->num_operands++; + + /* For the usual order of filling the operand stack */ + + walk_state->operand_index++; + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n", + object, + acpi_ut_get_object_type_name((union + acpi_operand_object *) + object), walk_state, + walk_state->num_operands)); + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_obj_stack_pop + * + * PARAMETERS: pop_count - Number of objects/entries to pop + * walk_state - Current Walk state + * + * RETURN: Status + * + * DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT + * deleted by this routine. + * + ******************************************************************************/ + +acpi_status +acpi_ds_obj_stack_pop(u32 pop_count, struct acpi_walk_state * walk_state) +{ + u32 i; + + ACPI_FUNCTION_NAME(ds_obj_stack_pop); + + for (i = 0; i < pop_count; i++) { + + /* Check for stack underflow */ + + if (walk_state->num_operands == 0) { + ACPI_ERROR((AE_INFO, + "Object stack underflow! Count=%X State=%p #Ops=%X", + pop_count, walk_state, + walk_state->num_operands)); + return (AE_STACK_UNDERFLOW); + } + + /* Just set the stack entry to null */ + + walk_state->num_operands--; + walk_state->operands[walk_state->num_operands] = NULL; + } + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n", + pop_count, walk_state, walk_state->num_operands)); + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_obj_stack_pop_and_delete + * + * PARAMETERS: pop_count - Number of objects/entries to pop + * walk_state - Current Walk state + * + * RETURN: Status + * + * DESCRIPTION: Pop this walk's object stack and delete each object that is + * popped off. + * + ******************************************************************************/ + +void +acpi_ds_obj_stack_pop_and_delete(u32 pop_count, + struct acpi_walk_state *walk_state) +{ + s32 i; + union acpi_operand_object *obj_desc; + + ACPI_FUNCTION_NAME(ds_obj_stack_pop_and_delete); + + if (pop_count == 0) { + return; + } + + for (i = (s32) pop_count - 1; i >= 0; i--) { + if (walk_state->num_operands == 0) { + return; + } + + /* Pop the stack and delete an object if present in this stack entry */ + + walk_state->num_operands--; + obj_desc = walk_state->operands[i]; + if (obj_desc) { + acpi_ut_remove_reference(walk_state->operands[i]); + walk_state->operands[i] = NULL; + } + } + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n", + pop_count, walk_state, walk_state->num_operands)); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_get_current_walk_state + * + * PARAMETERS: Thread - Get current active state for this Thread + * + * RETURN: Pointer to the current walk state + * + * DESCRIPTION: Get the walk state that is at the head of the list (the "current" + * walk state.) + * + ******************************************************************************/ + +struct acpi_walk_state *acpi_ds_get_current_walk_state(struct acpi_thread_state + *thread) +{ + ACPI_FUNCTION_NAME(ds_get_current_walk_state); + + if (!thread) { + return (NULL); + } + + ACPI_DEBUG_PRINT((ACPI_DB_PARSE, "Current WalkState %p\n", + thread->walk_state_list)); + + return (thread->walk_state_list); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_push_walk_state + * + * PARAMETERS: walk_state - State to push + * Thread - Thread state object + * + * RETURN: None + * + * DESCRIPTION: Place the Thread state at the head of the state list + * + ******************************************************************************/ + +void +acpi_ds_push_walk_state(struct acpi_walk_state *walk_state, + struct acpi_thread_state *thread) +{ + ACPI_FUNCTION_TRACE(ds_push_walk_state); + + walk_state->next = thread->walk_state_list; + thread->walk_state_list = walk_state; + + return_VOID; +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_pop_walk_state + * + * PARAMETERS: Thread - Current thread state + * + * RETURN: A walk_state object popped from the thread's stack + * + * DESCRIPTION: Remove and return the walkstate object that is at the head of + * the walk stack for the given walk list. NULL indicates that + * the list is empty. + * + ******************************************************************************/ + +struct acpi_walk_state *acpi_ds_pop_walk_state(struct acpi_thread_state *thread) +{ + struct acpi_walk_state *walk_state; + + ACPI_FUNCTION_TRACE(ds_pop_walk_state); + + walk_state = thread->walk_state_list; + + if (walk_state) { + + /* Next walk state becomes the current walk state */ + + thread->walk_state_list = walk_state->next; + + /* + * Don't clear the NEXT field, this serves as an indicator + * that there is a parent WALK STATE + * Do Not: walk_state->Next = NULL; + */ + } + + return_PTR(walk_state); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_create_walk_state + * + * PARAMETERS: owner_id - ID for object creation + * Origin - Starting point for this walk + * method_desc - Method object + * Thread - Current thread state + * + * RETURN: Pointer to the new walk state. + * + * DESCRIPTION: Allocate and initialize a new walk state. The current walk + * state is set to this new state. + * + ******************************************************************************/ + +struct acpi_walk_state *acpi_ds_create_walk_state(acpi_owner_id owner_id, union acpi_parse_object + *origin, union acpi_operand_object + *method_desc, struct acpi_thread_state + *thread) +{ + struct acpi_walk_state *walk_state; + + ACPI_FUNCTION_TRACE(ds_create_walk_state); + + walk_state = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_walk_state)); + if (!walk_state) { + return_PTR(NULL); + } + + walk_state->descriptor_type = ACPI_DESC_TYPE_WALK; + walk_state->method_desc = method_desc; + walk_state->owner_id = owner_id; + walk_state->origin = origin; + walk_state->thread = thread; + + walk_state->parser_state.start_op = origin; + + /* Init the method args/local */ + +#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY)) + acpi_ds_method_data_init(walk_state); +#endif + + /* Put the new state at the head of the walk list */ + + if (thread) { + acpi_ds_push_walk_state(walk_state, thread); + } + + return_PTR(walk_state); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_init_aml_walk + * + * PARAMETERS: walk_state - New state to be initialized + * Op - Current parse op + * method_node - Control method NS node, if any + * aml_start - Start of AML + * aml_length - Length of AML + * Info - Method info block (params, etc.) + * pass_number - 1, 2, or 3 + * + * RETURN: Status + * + * DESCRIPTION: Initialize a walk state for a pass 1 or 2 parse tree walk + * + ******************************************************************************/ + +acpi_status +acpi_ds_init_aml_walk(struct acpi_walk_state *walk_state, + union acpi_parse_object *op, + struct acpi_namespace_node *method_node, + u8 * aml_start, + u32 aml_length, + struct acpi_evaluate_info *info, u8 pass_number) +{ + acpi_status status; + struct acpi_parse_state *parser_state = &walk_state->parser_state; + union acpi_parse_object *extra_op; + + ACPI_FUNCTION_TRACE(ds_init_aml_walk); + + walk_state->parser_state.aml = + walk_state->parser_state.aml_start = aml_start; + walk_state->parser_state.aml_end = + walk_state->parser_state.pkg_end = aml_start + aml_length; + + /* The next_op of the next_walk will be the beginning of the method */ + + walk_state->next_op = NULL; + walk_state->pass_number = pass_number; + + if (info) { + walk_state->params = info->parameters; + walk_state->caller_return_desc = &info->return_object; + } + + status = acpi_ps_init_scope(&walk_state->parser_state, op); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + if (method_node) { + walk_state->parser_state.start_node = method_node; + walk_state->walk_type = ACPI_WALK_METHOD; + walk_state->method_node = method_node; + walk_state->method_desc = + acpi_ns_get_attached_object(method_node); + + /* Push start scope on scope stack and make it current */ + + status = + acpi_ds_scope_stack_push(method_node, ACPI_TYPE_METHOD, + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Init the method arguments */ + + status = acpi_ds_method_data_init_args(walk_state->params, + ACPI_METHOD_NUM_ARGS, + walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } else { + /* + * Setup the current scope. + * Find a Named Op that has a namespace node associated with it. + * search upwards from this Op. Current scope is the first + * Op with a namespace node. + */ + extra_op = parser_state->start_op; + while (extra_op && !extra_op->common.node) { + extra_op = extra_op->common.parent; + } + + if (!extra_op) { + parser_state->start_node = NULL; + } else { + parser_state->start_node = extra_op->common.node; + } + + if (parser_state->start_node) { + + /* Push start scope on scope stack and make it current */ + + status = + acpi_ds_scope_stack_push(parser_state->start_node, + parser_state->start_node-> + type, walk_state); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + } + } + + status = acpi_ds_init_callbacks(walk_state, pass_number); + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ds_delete_walk_state + * + * PARAMETERS: walk_state - State to delete + * + * RETURN: Status + * + * DESCRIPTION: Delete a walk state including all internal data structures + * + ******************************************************************************/ + +void acpi_ds_delete_walk_state(struct acpi_walk_state *walk_state) +{ + union acpi_generic_state *state; + + ACPI_FUNCTION_TRACE_PTR(ds_delete_walk_state, walk_state); + + if (!walk_state) { + return; + } + + if (walk_state->descriptor_type != ACPI_DESC_TYPE_WALK) { + ACPI_ERROR((AE_INFO, "%p is not a valid walk state", + walk_state)); + return; + } + + /* There should not be any open scopes */ + + if (walk_state->parser_state.scope) { + ACPI_ERROR((AE_INFO, "%p walk still has a scope list", + walk_state)); + acpi_ps_cleanup_scope(&walk_state->parser_state); + } + + /* Always must free any linked control states */ + + while (walk_state->control_state) { + state = walk_state->control_state; + walk_state->control_state = state->common.next; + + acpi_ut_delete_generic_state(state); + } + + /* Always must free any linked parse states */ + + while (walk_state->scope_info) { + state = walk_state->scope_info; + walk_state->scope_info = state->common.next; + + acpi_ut_delete_generic_state(state); + } + + /* Always must free any stacked result states */ + + while (walk_state->results) { + state = walk_state->results; + walk_state->results = state->common.next; + + acpi_ut_delete_generic_state(state); + } + + ACPI_FREE(walk_state); + return_VOID; +} |
