/****************************************************************************** * * Module Name: asloffset - Generate a C "offset table" for BIOS use. * *****************************************************************************/ /* * Copyright (C) 2000 - 2014, 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 #include "aslcompiler.y.h" #include #include #define _COMPONENT ACPI_COMPILER ACPI_MODULE_NAME ("asloffset") /* Local prototypes */ static void LsEmitOffsetTableEntry ( UINT32 FileId, ACPI_NAMESPACE_NODE *Node, UINT32 NamepathOffset, UINT32 Offset, char *OpName, UINT64 Value, UINT8 AmlOpcode, UINT16 ParentOpcode); /******************************************************************************* * * FUNCTION: LsAmlOffsetWalk * * PARAMETERS: ASL_WALK_CALLBACK * * RETURN: Status * * DESCRIPTION: Process one node during a offset table file generation. * * Three types of objects are currently emitted to the offset table: * 1) Tagged (named) resource descriptors * 2) Named integer objects with constant integer values * 3) Named package objects * 4) Operation Regions that have constant Offset (address) parameters * 5) Control methods * * The offset table allows the BIOS to dynamically update the values of these * objects at boot time. * ******************************************************************************/ ACPI_STATUS LsAmlOffsetWalk ( ACPI_PARSE_OBJECT *Op, UINT32 Level, void *Context) { UINT32 FileId = (UINT32) ACPI_TO_INTEGER (Context); ACPI_NAMESPACE_NODE *Node; UINT32 Length; UINT32 NamepathOffset; UINT32 DataOffset; ACPI_PARSE_OBJECT *NextOp; /* Ignore actual data blocks for resource descriptors */ if (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DATA) { return (AE_OK); /* Do NOT update the global AML offset */ } /* We are only interested in named objects (have a namespace node) */ Node = Op->Asl.Node; if (!Node) { Gbl_CurrentAmlOffset += Op->Asl.FinalAmlLength; return (AE_OK); } /* Named resource descriptor (has a descriptor tag) */ if ((Node->Type == ACPI_TYPE_LOCAL_RESOURCE) && (Op->Asl.CompileFlags & NODE_IS_RESOURCE_DESC)) { LsEmitOffsetTableEntry (FileId, Node, 0, Gbl_CurrentAmlOffset, Op->Asl.ParseOpName, 0, Op->Asl.Extra, AML_BUFFER_OP); Gbl_CurrentAmlOffset += Op->Asl.FinalAmlLength; return (AE_OK); } switch (Op->Asl.AmlOpcode) { case AML_NAME_OP: /* Named object -- Name (NameString, DataRefObject) */ if (!Op->Asl.Child) { FlPrintFile (FileId, "%s NO CHILD!\n", MsgBuffer); return (AE_OK); } Length = Op->Asl.FinalAmlLength; NamepathOffset = Gbl_CurrentAmlOffset + Length; /* Get to the NameSeg/NamePath Op (and length of the name) */ Op = Op->Asl.Child; /* Get offset of last nameseg and the actual data */ NamepathOffset = Gbl_CurrentAmlOffset + Length + (Op->Asl.FinalAmlLength - ACPI_NAME_SIZE); DataOffset = Gbl_CurrentAmlOffset + Length + Op->Asl.FinalAmlLength; /* Get actual value associated with the name */ Op = Op->Asl.Next; switch (Op->Asl.AmlOpcode) { case AML_BYTE_OP: case AML_WORD_OP: case AML_DWORD_OP: case AML_QWORD_OP: /* The +1 is to handle the integer size prefix (opcode) */ LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, (DataOffset + 1), Op->Asl.ParseOpName, Op->Asl.Value.Integer, (UINT8) Op->Asl.AmlOpcode, AML_NAME_OP); break; case AML_ONE_OP: case AML_ONES_OP: case AML_ZERO_OP: /* For these, offset will point to the opcode */ LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, DataOffset, Op->Asl.ParseOpName, Op->Asl.Value.Integer, (UINT8) Op->Asl.AmlOpcode, AML_NAME_OP); break; case AML_PACKAGE_OP: case AML_VAR_PACKAGE_OP: /* Get the package element count */ NextOp = Op->Asl.Child; LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, DataOffset, Op->Asl.ParseOpName, NextOp->Asl.Value.Integer, (UINT8) Op->Asl.AmlOpcode, AML_NAME_OP); break; default: break; } Gbl_CurrentAmlOffset += Length; return (AE_OK); case AML_REGION_OP: /* OperationRegion (NameString, RegionSpace, RegionOffset, RegionLength) */ Length = Op->Asl.FinalAmlLength; /* Get the name/namepath node */ NextOp = Op->Asl.Child; /* Get offset of last nameseg and the actual data */ NamepathOffset = Gbl_CurrentAmlOffset + Length + (NextOp->Asl.FinalAmlLength - ACPI_NAME_SIZE); DataOffset = Gbl_CurrentAmlOffset + Length + (NextOp->Asl.FinalAmlLength + 1); /* Get the SpaceId node, then the Offset (address) node */ NextOp = NextOp->Asl.Next; NextOp = NextOp->Asl.Next; switch (NextOp->Asl.AmlOpcode) { /* * We are only interested in integer constants that can be changed * at boot time. Note, the One/Ones/Zero opcodes are considered * non-changeable, so we ignore them here. */ case AML_BYTE_OP: case AML_WORD_OP: case AML_DWORD_OP: case AML_QWORD_OP: LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, (DataOffset + 1), Op->Asl.ParseOpName, NextOp->Asl.Value.Integer, (UINT8) NextOp->Asl.AmlOpcode, AML_REGION_OP); Gbl_CurrentAmlOffset += Length; return (AE_OK); default: break; } break; case AML_METHOD_OP: /* Method (Namepath, ...) */ Length = Op->Asl.FinalAmlLength; /* Get the NameSeg/NamePath Op */ NextOp = Op->Asl.Child; /* Get offset of last nameseg and the actual data (flags byte) */ NamepathOffset = Gbl_CurrentAmlOffset + Length + (NextOp->Asl.FinalAmlLength - ACPI_NAME_SIZE); DataOffset = Gbl_CurrentAmlOffset + Length + NextOp->Asl.FinalAmlLength; /* Get the flags byte Op */ NextOp = NextOp->Asl.Next; LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, DataOffset, Op->Asl.ParseOpName, NextOp->Asl.Value.Integer, (UINT8) Op->Asl.AmlOpcode, AML_METHOD_OP); break; case AML_PROCESSOR_OP: /* Processor (Namepath, ProcessorId, Address, Length) */ Length = Op->Asl.FinalAmlLength; NextOp = Op->Asl.Child; /* Get Namepath */ /* Get offset of last nameseg and the actual data (PBlock address) */ NamepathOffset = Gbl_CurrentAmlOffset + Length + (NextOp->Asl.FinalAmlLength - ACPI_NAME_SIZE); DataOffset = Gbl_CurrentAmlOffset + Length + (NextOp->Asl.FinalAmlLength + 1); NextOp = NextOp->Asl.Next; /* Get ProcessorID (BYTE) */ NextOp = NextOp->Asl.Next; /* Get Address (DWORD) */ LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, DataOffset, Op->Asl.ParseOpName, NextOp->Asl.Value.Integer, (UINT8) AML_DWORD_OP, AML_PROCESSOR_OP); break; case AML_DEVICE_OP: case AML_SCOPE_OP: case AML_THERMAL_ZONE_OP: /* Device/Scope/ThermalZone (Namepath) */ Length = Op->Asl.FinalAmlLength; NextOp = Op->Asl.Child; /* Get Namepath */ /* Get offset of last nameseg */ NamepathOffset = Gbl_CurrentAmlOffset + Length + (NextOp->Asl.FinalAmlLength - ACPI_NAME_SIZE); LsEmitOffsetTableEntry (FileId, Node, NamepathOffset, 0, Op->Asl.ParseOpName, 0, (UINT8) 0, Op->Asl.AmlOpcode); break; default: break; } Gbl_CurrentAmlOffset += Op->Asl.FinalAmlLength; return (AE_OK); } /******************************************************************************* * * FUNCTION: LsEmitOffsetTableEntry * * PARAMETERS: FileId - ID of current listing file * Node - Namespace node associated with the name * Offset - Offset of the value within the AML table * OpName - Name of the AML opcode * Value - Current value of the AML field * AmlOpcode - Opcode associated with the field * ObjectType - ACPI object type * * RETURN: None * * DESCRIPTION: Emit a line of the offset table (-so option) * ******************************************************************************/ static void LsEmitOffsetTableEntry ( UINT32 FileId, ACPI_NAMESPACE_NODE *Node, UINT32 NamepathOffset, UINT32 Offset, char *OpName, UINT64 Value, UINT8 AmlOpcode, UINT16 ParentOpcode) { ACPI_BUFFER TargetPath; ACPI_STATUS Status; /* Get the full pathname to the namespace node */ TargetPath.Length = ACPI_ALLOCATE_LOCAL_BUFFER; Status = AcpiNsHandleToPathname (Node, &TargetPath); if (ACPI_FAILURE (Status)) { return; } /* [1] - Skip the opening backslash for the path */ strcpy (MsgBuffer, "\""); strcat (MsgBuffer, &((char *) TargetPath.Pointer)[1]); strcat (MsgBuffer, "\","); ACPI_FREE (TargetPath.Pointer); /* * Max offset is 4G, constrained by 32-bit ACPI table length. * Max Length for Integers is 8 bytes. */ FlPrintFile (FileId, " {%-29s 0x%4.4X, 0x%8.8X, 0x%2.2X, 0x%8.8X, 0x%8.8X%8.8X}, /* %s */\n", MsgBuffer, ParentOpcode, NamepathOffset, AmlOpcode, Offset, ACPI_FORMAT_UINT64 (Value), OpName); } /******************************************************************************* * * FUNCTION: LsDoOffsetTableHeader, LsDoOffsetTableFooter * * PARAMETERS: FileId - ID of current listing file * * RETURN: None * * DESCRIPTION: Header and footer for the offset table file. * ******************************************************************************/ void LsDoOffsetTableHeader ( UINT32 FileId) { FlPrintFile (FileId, "#ifndef __AML_OFFSET_TABLE_H\n" "#define __AML_OFFSET_TABLE_H\n\n"); FlPrintFile (FileId, "typedef struct {\n" " char *Pathname; /* Full pathname (from root) to the object */\n" " unsigned short ParentOpcode; /* AML opcode for the parent object */\n" " unsigned long NamesegOffset; /* Offset of last nameseg in the parent namepath */\n" " unsigned char Opcode; /* AML opcode for the data */\n" " unsigned long Offset; /* Offset for the data */\n" " unsigned long long Value; /* Original value of the data (as applicable) */\n" "} AML_OFFSET_TABLE_ENTRY;\n\n"); FlPrintFile (FileId, "#endif /* __AML_OFFSET_TABLE_H */\n\n"); FlPrintFile (FileId, "/*\n" " * Information specific to the supported object types:\n" " *\n" " * Integers:\n" " * Opcode is the integer prefix, indicates length of the data\n" " * (One of: BYTE, WORD, DWORD, QWORD, ZERO, ONE, ONES)\n" " * Offset points to the actual integer data\n" " * Value is the existing value in the AML\n" " *\n" " * Packages:\n" " * Opcode is the package or var_package opcode\n" " * Offset points to the package opcode\n" " * Value is the package element count\n" " *\n" " * Operation Regions:\n" " * Opcode is the address integer prefix, indicates length of the data\n" " * Offset points to the region address\n" " * Value is the existing address value in the AML\n" " *\n" " * Control Methods:\n" " * Offset points to the method flags byte\n" " * Value is the existing flags value in the AML\n" " *\n" " * Processors:\n" " * Offset points to the first byte of the PBlock Address\n" " *\n" " * Resource Descriptors:\n" " * Opcode is the descriptor type\n" " * Offset points to the start of the descriptor\n" " *\n" " * Scopes/Devices/ThermalZones:\n" " * Nameseg offset only\n" " */\n"); FlPrintFile (FileId, "AML_OFFSET_TABLE_ENTRY %s_%s_OffsetTable[] =\n{\n", Gbl_TableSignature, Gbl_TableId); } void LsDoOffsetTableFooter ( UINT32 FileId) { FlPrintFile (FileId, " {NULL,0,0,0,0,0} /* Table terminator */\n};\n\n"); Gbl_CurrentAmlOffset = 0; }