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Diffstat (limited to 'source/compiler/asloffset.c')
| -rw-r--r-- | source/compiler/asloffset.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/source/compiler/asloffset.c b/source/compiler/asloffset.c new file mode 100644 index 000000000000..190b92ada863 --- /dev/null +++ b/source/compiler/asloffset.c @@ -0,0 +1,326 @@ +/****************************************************************************** + * + * 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, + UINT32 Length, + 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) Operation Regions that have constant Offset (address) parameters + * + * 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 *AddressOp; + + + /* 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.FinalAmlLength, Op->Asl.ParseOpName, 0, Op->Asl.Extra); + } + + /* Named object -- Name (NameString, DataRefObject) */ + + else if (Op->Asl.AmlOpcode == AML_NAME_OP) + { + 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/-1 is to handle the integer size prefix (opcode) */ + + LsEmitOffsetTableEntry (FileId, Node, + (Gbl_CurrentAmlOffset + OffsetOfOpcode + 1), + (Op->Asl.FinalAmlLength - 1), Op->Asl.ParseOpName, + Op->Asl.Value.Integer, (UINT8) Op->Asl.AmlOpcode); + break; + + default: + break; + } + + Gbl_CurrentAmlOffset += Length; + return (AE_OK); + } + + /* OperationRegion (NameString, RegionSpace, RegionOffset, RegionLength) */ + + else if (Op->Asl.AmlOpcode == AML_REGION_OP) + { + Length = Op->Asl.FinalAmlLength; + + /* Get the name/namepath node */ + + AddressOp = Op->Asl.Child; + OffsetOfOpcode = Length + AddressOp->Asl.FinalAmlLength + 1; + + /* Get the SpaceId node, then the Offset (address) node */ + + AddressOp = AddressOp->Asl.Next; + AddressOp = AddressOp->Asl.Next; + + switch (AddressOp->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/-1 is to handle the integer size prefix (opcode) */ + + LsEmitOffsetTableEntry (FileId, Node, + (Gbl_CurrentAmlOffset + OffsetOfOpcode + 1), + (AddressOp->Asl.FinalAmlLength - 1), Op->Asl.ParseOpName, + AddressOp->Asl.Value.Integer, (UINT8) AddressOp->Asl.AmlOpcode); + + Gbl_CurrentAmlOffset += Length; + return (AE_OK); + + 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 + * Length - Length in bytes of the value + * 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, + UINT32 Length, + 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) +{ + + Gbl_CurrentAmlOffset = 0; + + 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 AmlOpcode;\n" + " unsigned long long AmlValue;\n" + "} AML_OFFSET_TABLE_ENTRY;\n\n"); + + FlPrintFile (FileId, + "#endif /* __AML_OFFSET_TABLE_H */\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; +} |