/****************************************************************************** * * Module Name: tbconvrt - ACPI Table conversion utilities * *****************************************************************************/ /* * Copyright (C) 2000 - 2006, R. Byron Moore * 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 #include #include #define _COMPONENT ACPI_TABLES ACPI_MODULE_NAME("tbconvrt") /* Local prototypes */ static void acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct, u8 register_bit_width, acpi_physical_address address); static void acpi_tb_convert_fadt1(struct fadt_descriptor_rev2 *local_fadt, struct fadt_descriptor_rev1 *original_fadt); static void acpi_tb_convert_fadt2(struct fadt_descriptor_rev2 *local_fadt, struct fadt_descriptor_rev2 *original_fadt); u8 acpi_fadt_is_v1; EXPORT_SYMBOL(acpi_fadt_is_v1); /******************************************************************************* * * FUNCTION: acpi_tb_get_table_count * * PARAMETERS: RSDP - Pointer to the RSDP * RSDT - Pointer to the RSDT/XSDT * * RETURN: The number of tables pointed to by the RSDT or XSDT. * * DESCRIPTION: Calculate the number of tables. Automatically handles either * an RSDT or XSDT. * ******************************************************************************/ u32 acpi_tb_get_table_count(struct rsdp_descriptor *RSDP, struct acpi_table_header *RSDT) { u32 pointer_size; ACPI_FUNCTION_ENTRY(); /* RSDT pointers are 32 bits, XSDT pointers are 64 bits */ if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) { pointer_size = sizeof(u32); } else { pointer_size = sizeof(u64); } /* * Determine the number of tables pointed to by the RSDT/XSDT. * This is defined by the ACPI Specification to be the number of * pointers contained within the RSDT/XSDT. The size of the pointers * is architecture-dependent. */ return ((RSDT->length - sizeof(struct acpi_table_header)) / pointer_size); } /******************************************************************************* * * FUNCTION: acpi_tb_convert_to_xsdt * * PARAMETERS: table_info - Info about the RSDT * * RETURN: Status * * DESCRIPTION: Convert an RSDT to an XSDT (internal common format) * ******************************************************************************/ acpi_status acpi_tb_convert_to_xsdt(struct acpi_table_desc *table_info) { acpi_size table_size; u32 i; XSDT_DESCRIPTOR *new_table; ACPI_FUNCTION_ENTRY(); /* Compute size of the converted XSDT */ table_size = ((acpi_size) acpi_gbl_rsdt_table_count * sizeof(u64)) + sizeof(struct acpi_table_header); /* Allocate an XSDT */ new_table = ACPI_MEM_CALLOCATE(table_size); if (!new_table) { return (AE_NO_MEMORY); } /* Copy the header and set the length */ ACPI_MEMCPY(new_table, table_info->pointer, sizeof(struct acpi_table_header)); new_table->length = (u32) table_size; /* Copy the table pointers */ for (i = 0; i < acpi_gbl_rsdt_table_count; i++) { /* RSDT pointers are 32 bits, XSDT pointers are 64 bits */ if (acpi_gbl_root_table_type == ACPI_TABLE_TYPE_RSDT) { ACPI_STORE_ADDRESS(new_table->table_offset_entry[i], (ACPI_CAST_PTR (struct rsdt_descriptor_rev1, table_info->pointer))-> table_offset_entry[i]); } else { new_table->table_offset_entry[i] = (ACPI_CAST_PTR(XSDT_DESCRIPTOR, table_info->pointer))-> table_offset_entry[i]; } } /* Delete the original table (either mapped or in a buffer) */ acpi_tb_delete_single_table(table_info); /* Point the table descriptor to the new table */ table_info->pointer = ACPI_CAST_PTR(struct acpi_table_header, new_table); table_info->length = table_size; table_info->allocation = ACPI_MEM_ALLOCATED; return (AE_OK); } /******************************************************************************* * * FUNCTION: acpi_tb_init_generic_address * * PARAMETERS: new_gas_struct - GAS struct to be initialized * register_bit_width - Width of this register * Address - Address of the register * * RETURN: None * * DESCRIPTION: Initialize a GAS structure. * ******************************************************************************/ static void acpi_tb_init_generic_address(struct acpi_generic_address *new_gas_struct, u8 register_bit_width, acpi_physical_address address) { ACPI_STORE_ADDRESS(new_gas_struct->address, address); new_gas_struct->address_space_id = ACPI_ADR_SPACE_SYSTEM_IO; new_gas_struct->register_bit_width = register_bit_width; new_gas_struct->register_bit_offset = 0; new_gas_struct->access_width = 0; } /******************************************************************************* * * FUNCTION: acpi_tb_convert_fadt1 * * PARAMETERS: local_fadt - Pointer to new FADT * original_fadt - Pointer to old FADT * * RETURN: None, populates local_fadt * * DESCRIPTION: Convert an ACPI 1.0 FADT to common internal format * ******************************************************************************/ static void acpi_tb_convert_fadt1(struct fadt_descriptor_rev2 *local_fadt, struct fadt_descriptor_rev1 *original_fadt) { /* ACPI 1.0 FACS */ /* The BIOS stored FADT should agree with Revision 1.0 */ acpi_fadt_is_v1 = 1; /* * Copy the table header and the common part of the tables. * * The 2.0 table is an extension of the 1.0 table, so the entire 1.0 * table can be copied first, then expand some fields to 64 bits. */ ACPI_MEMCPY(local_fadt, original_fadt, sizeof(struct fadt_descriptor_rev1)); /* Convert table pointers to 64-bit fields */ ACPI_STORE_ADDRESS(local_fadt->xfirmware_ctrl, local_fadt->V1_firmware_ctrl); ACPI_STORE_ADDRESS(local_fadt->Xdsdt, local_fadt->V1_dsdt); /* * System Interrupt Model isn't used in ACPI 2.0 * (local_fadt->Reserved1 = 0;) */ /* * This field is set by the OEM to convey the preferred power management * profile to OSPM. It doesn't have any 1.0 equivalence. Since we don't * know what kind of 32-bit system this is, we will use "unspecified". */ local_fadt->prefer_PM_profile = PM_UNSPECIFIED; /* * Processor Performance State Control. This is the value OSPM writes to * the SMI_CMD register to assume processor performance state control * responsibility. There isn't any equivalence in 1.0, but as many 1.x * ACPI tables contain _PCT and _PSS we also keep this value, unless * acpi_strict is set. */ if (acpi_strict) local_fadt->pstate_cnt = 0; /* * Support for the _CST object and C States change notification. * This data item hasn't any 1.0 equivalence so leave it zero. */ local_fadt->cst_cnt = 0; /* * FADT Rev 2 was an interim FADT released between ACPI 1.0 and ACPI 2.0. * It primarily adds the FADT reset mechanism. */ if ((original_fadt->revision == 2) && (original_fadt->length == sizeof(struct fadt_descriptor_rev2_minus))) { /* * Grab the entire generic address struct, plus the 1-byte reset value * that immediately follows. */ ACPI_MEMCPY(&local_fadt->reset_register, &(ACPI_CAST_PTR(struct fadt_descriptor_rev2_minus, original_fadt))->reset_register, sizeof(struct acpi_generic_address) + 1); } else { /* * Since there isn't any equivalence in 1.0 and since it is highly * likely that a 1.0 system has legacy support. */ local_fadt->iapc_boot_arch = BAF_LEGACY_DEVICES; } /* * Convert the V1.0 block addresses to V2.0 GAS structures */ acpi_tb_init_generic_address(&local_fadt->xpm1a_evt_blk, local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt-> V1_pm1a_evt_blk); acpi_tb_init_generic_address(&local_fadt->xpm1b_evt_blk, local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt-> V1_pm1b_evt_blk); acpi_tb_init_generic_address(&local_fadt->xpm1a_cnt_blk, local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt-> V1_pm1a_cnt_blk); acpi_tb_init_generic_address(&local_fadt->xpm1b_cnt_blk, local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt-> V1_pm1b_cnt_blk); acpi_tb_init_generic_address(&local_fadt->xpm2_cnt_blk, local_fadt->pm2_cnt_len, (acpi_physical_address) local_fadt-> V1_pm2_cnt_blk); acpi_tb_init_generic_address(&local_fadt->xpm_tmr_blk, local_fadt->pm_tm_len, (acpi_physical_address) local_fadt-> V1_pm_tmr_blk); acpi_tb_init_generic_address(&local_fadt->xgpe0_blk, 0, (acpi_physical_address) local_fadt-> V1_gpe0_blk); acpi_tb_init_generic_address(&local_fadt->xgpe1_blk, 0, (acpi_physical_address) local_fadt-> V1_gpe1_blk); /* Create separate GAS structs for the PM1 Enable registers */ acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable, (u8) ACPI_DIV_2(acpi_gbl_FADT-> pm1_evt_len), (acpi_physical_address) (local_fadt->xpm1a_evt_blk.address + ACPI_DIV_2(acpi_gbl_FADT->pm1_evt_len))); /* PM1B is optional; leave null if not present */ if (local_fadt->xpm1b_evt_blk.address) { acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable, (u8) ACPI_DIV_2(acpi_gbl_FADT-> pm1_evt_len), (acpi_physical_address) (local_fadt->xpm1b_evt_blk. address + ACPI_DIV_2(acpi_gbl_FADT-> pm1_evt_len))); } } /******************************************************************************* * * FUNCTION: acpi_tb_convert_fadt2 * * PARAMETERS: local_fadt - Pointer to new FADT * original_fadt - Pointer to old FADT * * RETURN: None, populates local_fadt * * DESCRIPTION: Convert an ACPI 2.0 FADT to common internal format. * Handles optional "X" fields. * ******************************************************************************/ static void acpi_tb_convert_fadt2(struct fadt_descriptor_rev2 *local_fadt, struct fadt_descriptor_rev2 *original_fadt) { /* We have an ACPI 2.0 FADT but we must copy it to our local buffer */ ACPI_MEMCPY(local_fadt, original_fadt, sizeof(struct fadt_descriptor_rev2)); /* * "X" fields are optional extensions to the original V1.0 fields, so * we must selectively expand V1.0 fields if the corresponding X field * is zero. */ if (!(local_fadt->xfirmware_ctrl)) { ACPI_STORE_ADDRESS(local_fadt->xfirmware_ctrl, local_fadt->V1_firmware_ctrl); } if (!(local_fadt->Xdsdt)) { ACPI_STORE_ADDRESS(local_fadt->Xdsdt, local_fadt->V1_dsdt); } if (!(local_fadt->xpm1a_evt_blk.address)) { acpi_tb_init_generic_address(&local_fadt->xpm1a_evt_blk, local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt->V1_pm1a_evt_blk); } if (!(local_fadt->xpm1b_evt_blk.address)) { acpi_tb_init_generic_address(&local_fadt->xpm1b_evt_blk, local_fadt->pm1_evt_len, (acpi_physical_address) local_fadt->V1_pm1b_evt_blk); } if (!(local_fadt->xpm1a_cnt_blk.address)) { acpi_tb_init_generic_address(&local_fadt->xpm1a_cnt_blk, local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt->V1_pm1a_cnt_blk); } if (!(local_fadt->xpm1b_cnt_blk.address)) { acpi_tb_init_generic_address(&local_fadt->xpm1b_cnt_blk, local_fadt->pm1_cnt_len, (acpi_physical_address) local_fadt->V1_pm1b_cnt_blk); } if (!(local_fadt->xpm2_cnt_blk.address)) { acpi_tb_init_generic_address(&local_fadt->xpm2_cnt_blk, local_fadt->pm2_cnt_len, (acpi_physical_address) local_fadt->V1_pm2_cnt_blk); } if (!(local_fadt->xpm_tmr_blk.address)) { acpi_tb_init_generic_address(&local_fadt->xpm_tmr_blk, local_fadt->pm_tm_len, (acpi_physical_address) local_fadt->V1_pm_tmr_blk); } if (!(local_fadt->xgpe0_blk.address)) { acpi_tb_init_generic_address(&local_fadt->xgpe0_blk, 0, (acpi_physical_address) local_fadt->V1_gpe0_blk); } if (!(local_fadt->xgpe1_blk.address)) { acpi_tb_init_generic_address(&local_fadt->xgpe1_blk, 0, (acpi_physical_address) local_fadt->V1_gpe1_blk); } /* Create separate GAS structs for the PM1 Enable registers */ acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable, (u8) ACPI_DIV_2(acpi_gbl_FADT-> pm1_evt_len), (acpi_physical_address) (local_fadt->xpm1a_evt_blk.address + ACPI_DIV_2(acpi_gbl_FADT->pm1_evt_len))); acpi_gbl_xpm1a_enable.address_space_id = local_fadt->xpm1a_evt_blk.address_space_id; /* PM1B is optional; leave null if not present */ if (local_fadt->xpm1b_evt_blk.address) { acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable, (u8) ACPI_DIV_2(acpi_gbl_FADT-> pm1_evt_len), (acpi_physical_address) (local_fadt->xpm1b_evt_blk. address + ACPI_DIV_2(acpi_gbl_FADT-> pm1_evt_len))); acpi_gbl_xpm1b_enable.address_space_id = local_fadt->xpm1b_evt_blk.address_space_id; } } /******************************************************************************* * * FUNCTION: acpi_tb_convert_table_fadt * * PARAMETERS: None * * RETURN: Status * * DESCRIPTION: Converts a BIOS supplied ACPI 1.0 FADT to a local * ACPI 2.0 FADT. If the BIOS supplied a 2.0 FADT then it is simply * copied to the local FADT. The ACPI CA software uses this * local FADT. Thus a significant amount of special #ifdef * type codeing is saved. * ******************************************************************************/ acpi_status acpi_tb_convert_table_fadt(void) { struct fadt_descriptor_rev2 *local_fadt; struct acpi_table_desc *table_desc; ACPI_FUNCTION_TRACE("tb_convert_table_fadt"); /* * acpi_gbl_FADT is valid. Validate the FADT length. The table must be * at least as long as the version 1.0 FADT */ if (acpi_gbl_FADT->length < sizeof(struct fadt_descriptor_rev1)) { ACPI_ERROR((AE_INFO, "FADT is invalid, too short: 0x%X", acpi_gbl_FADT->length)); return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); } /* Allocate buffer for the ACPI 2.0(+) FADT */ local_fadt = ACPI_MEM_CALLOCATE(sizeof(struct fadt_descriptor_rev2)); if (!local_fadt) { return_ACPI_STATUS(AE_NO_MEMORY); } if (acpi_gbl_FADT->revision >= FADT2_REVISION_ID) { if (acpi_gbl_FADT->length < sizeof(struct fadt_descriptor_rev2)) { /* Length is too short to be a V2.0 table */ ACPI_WARNING((AE_INFO, "Inconsistent FADT length (0x%X) and revision (0x%X), using FADT V1.0 portion of table", acpi_gbl_FADT->length, acpi_gbl_FADT->revision)); acpi_tb_convert_fadt1(local_fadt, (void *)acpi_gbl_FADT); } else { /* Valid V2.0 table */ acpi_tb_convert_fadt2(local_fadt, acpi_gbl_FADT); } } else { /* Valid V1.0 table */ acpi_tb_convert_fadt1(local_fadt, (void *)acpi_gbl_FADT); } /* Global FADT pointer will point to the new common V2.0 FADT */ acpi_gbl_FADT = local_fadt; acpi_gbl_FADT->length = sizeof(FADT_DESCRIPTOR); /* Free the original table */ table_desc = acpi_gbl_table_lists[ACPI_TABLE_FADT].next; acpi_tb_delete_single_table(table_desc); /* Install the new table */ table_desc->pointer = ACPI_CAST_PTR(struct acpi_table_header, acpi_gbl_FADT); table_desc->allocation = ACPI_MEM_ALLOCATED; table_desc->length = sizeof(struct fadt_descriptor_rev2); /* Dump the entire FADT */ ACPI_DEBUG_PRINT((ACPI_DB_TABLES, "Hex dump of common internal FADT, size %d (%X)\n", acpi_gbl_FADT->length, acpi_gbl_FADT->length)); ACPI_DUMP_BUFFER(ACPI_CAST_PTR(u8, acpi_gbl_FADT), acpi_gbl_FADT->length); return_ACPI_STATUS(AE_OK); } /******************************************************************************* * * FUNCTION: acpi_tb_build_common_facs * * PARAMETERS: table_info - Info for currently installed FACS * * RETURN: Status * * DESCRIPTION: Convert ACPI 1.0 and ACPI 2.0 FACS to a common internal * table format. * ******************************************************************************/ acpi_status acpi_tb_build_common_facs(struct acpi_table_desc *table_info) { ACPI_FUNCTION_TRACE("tb_build_common_facs"); /* Absolute minimum length is 24, but the ACPI spec says 64 */ if (acpi_gbl_FACS->length < 24) { ACPI_ERROR((AE_INFO, "Invalid FACS table length: 0x%X", acpi_gbl_FACS->length)); return_ACPI_STATUS(AE_INVALID_TABLE_LENGTH); } if (acpi_gbl_FACS->length < 64) { ACPI_WARNING((AE_INFO, "FACS is shorter than the ACPI specification allows: 0x%X, using anyway", acpi_gbl_FACS->length)); } /* Copy fields to the new FACS */ acpi_gbl_common_fACS.global_lock = &(acpi_gbl_FACS->global_lock); if ((acpi_gbl_RSDP->revision < 2) || (acpi_gbl_FACS->length < 32) || (!(acpi_gbl_FACS->xfirmware_waking_vector))) { /* ACPI 1.0 FACS or short table or optional X_ field is zero */ acpi_gbl_common_fACS.firmware_waking_vector = ACPI_CAST_PTR(u64, & (acpi_gbl_FACS-> firmware_waking_vector)); acpi_gbl_common_fACS.vector_width = 32; } else { /* ACPI 2.0 FACS with valid X_ field */ acpi_gbl_common_fACS.firmware_waking_vector = &acpi_gbl_FACS->xfirmware_waking_vector; acpi_gbl_common_fACS.vector_width = 64; } return_ACPI_STATUS(AE_OK); }