/****************************************************************************** * * Module Name: asloffset - Generate a C "offset table" for BIOS use. * *****************************************************************************/ /* * Copyright (C) 2000 - 2013, 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 "aslcompiler.h" #include "aslcompiler.y.h" #include "amlcode.h" #include "acnamesp.h" #define _COMPONENT ACPI_COMPILER ACPI_MODULE_NAME ("asloffset") /* Local prototypes */ static void LsEmitOffsetTableEntry ( UINT32 FileId, ACPI_NAMESPACE_NODE *Node, UINT32 Offset, char *OpName, UINT64 Value, UINT8 AmlOpcode); /******************************************************************************* * * 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 OffsetOfOpcode; 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, Gbl_CurrentAmlOffset, Op->Asl.ParseOpName, 0, Op->Asl.Extra); 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; /* Get to the NameSeg/NamePath Op (and length of the name) */ Op = Op->Asl.Child; OffsetOfOpcode = Length + Op->Asl.FinalAmlLength; /* Get actual value associated with the name */ Op = Op->Asl.Next; switch (Op->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: /* The +1 is to handle the integer size prefix (opcode) */ LsEmitOffsetTableEntry (FileId, Node, (Gbl_CurrentAmlOffset + OffsetOfOpcode + 1), Op->Asl.ParseOpName, Op->Asl.Value.Integer, (UINT8) Op->Asl.AmlOpcode); break; case AML_PACKAGE_OP: case AML_VAR_PACKAGE_OP: NextOp = Op->Asl.Child; LsEmitOffsetTableEntry (FileId, Node, (Gbl_CurrentAmlOffset + OffsetOfOpcode), Op->Asl.ParseOpName, NextOp->Asl.Value.Integer, (UINT8) Op->Asl.AmlOpcode); 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; OffsetOfOpcode = 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, (Gbl_CurrentAmlOffset + OffsetOfOpcode + 1), Op->Asl.ParseOpName, NextOp->Asl.Value.Integer, (UINT8) NextOp->Asl.AmlOpcode); 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; /* Point to the *last* nameseg in the namepath */ OffsetOfOpcode = NextOp->Asl.FinalAmlLength - ACPI_NAME_SIZE; LsEmitOffsetTableEntry (FileId, Node, (Gbl_CurrentAmlOffset + OffsetOfOpcode + Length), Op->Asl.ParseOpName, *((UINT32 *) &NextOp->Asl.Value.Buffer[OffsetOfOpcode]), (UINT8) 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 * * RETURN: None * * DESCRIPTION: Emit a line of the offset table (-so option) * ******************************************************************************/ static void LsEmitOffsetTableEntry ( UINT32 FileId, ACPI_NAMESPACE_NODE *Node, UINT32 Offset, char *OpName, UINT64 Value, UINT8 AmlOpcode) { 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%8.8X, 0x%2.2X, 0x%8.8X%8.8X}, /* %s */\n", MsgBuffer, Offset, AmlOpcode, 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;\n" " unsigned long Offset;\n" " unsigned char Opcode;\n" " unsigned long long Value;\n" "} AML_OFFSET_TABLE_ENTRY;\n\n"); FlPrintFile (FileId, "#endif /* __AML_OFFSET_TABLE_H */\n\n"); FlPrintFile (FileId, "/*\n" " * Information about supported object types:\n" " *\n" " * Integers:\n" " * Offset points to the actual integer data\n" " * Opcode is the integer prefix, indicates length of the data\n" " * Value is the existing value in the AML\n" " *\n" " * Packages:\n" " * Offset points to the package opcode\n" " * Opcode is the package or var_package opcode\n" " * Value is the package element cound\n" " *\n" " * Operation Regions:\n" " * Offset points to the region address data\n" " * Opcode is the address integer prefix, indicates length of the data\n" " * Value is the existing address value in the AML\n" " *\n" " * Control Methods:\n" " * Offset points to the first byte of the namepath\n" " *\n" " * Resource Descriptors:\n" " * Offset points to the start of the descriptor\n" " * Opcode is the descriptor type\n" " */\n"); FlPrintFile (FileId, "AML_OFFSET_TABLE_ENTRY %s_%s_OffsetTable[] =\n{\n", Gbl_TableSignature, Gbl_TableId); } void LsDoOffsetTableFooter ( UINT32 FileId) { FlPrintFile (FileId, " {0,0,0,0} /* Table terminator */\n};\n\n"); Gbl_CurrentAmlOffset = 0; }