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459 lines
13 KiB
C
459 lines
13 KiB
C
/** @file
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ACPI Sdt Protocol Driver
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Copyright (c) 2010, Intel Corporation. All rights reserved. <BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "AcpiTable.h"
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/**
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Retrieve option term according to AmlByteEncoding and Buffer.
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@param[in] AmlByteEncoding AML Byte Encoding.
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@param[in] Buffer AML buffer.
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@param[in] MaxBufferSize AML buffer MAX size. The parser can not parse any data exceed this region.
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@param[in] TermIndex Index of the data to retrieve from the object.
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@param[out] DataType Points to the returned data type or EFI_ACPI_DATA_TYPE_NONE if no data exists
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for the specified index.
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@param[out] Data Upon return, points to the pointer to the data.
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@param[out] DataSize Upon return, points to the size of Data.
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@retval EFI_SUCCESS Success.
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@retval EFI_INVALID_PARAMETER Buffer does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlParseOptionTerm (
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IN AML_BYTE_ENCODING *AmlByteEncoding,
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IN UINT8 *Buffer,
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IN UINTN MaxBufferSize,
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IN AML_OP_PARSE_INDEX TermIndex,
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OUT EFI_ACPI_DATA_TYPE *DataType,
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OUT VOID **Data,
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OUT UINTN *DataSize
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)
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{
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AML_BYTE_ENCODING *ChildAmlByteEncoding;
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EFI_STATUS Status;
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if (DataType != NULL) {
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*DataType = AmlTypeToAcpiType (AmlByteEncoding->Format[TermIndex - 1]);
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}
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if (Data != NULL) {
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*Data = Buffer;
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}
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//
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// Parse term according to AML type
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//
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switch (AmlByteEncoding->Format[TermIndex - 1]) {
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case AML_UINT8:
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*DataSize = sizeof(UINT8);
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break;
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case AML_UINT16:
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*DataSize = sizeof(UINT16);
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break;
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case AML_UINT32:
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*DataSize = sizeof(UINT32);
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break;
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case AML_UINT64:
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*DataSize = sizeof(UINT64);
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break;
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case AML_STRING:
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*DataSize = AsciiStrSize((CHAR8 *)Buffer);
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break;
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case AML_NAME:
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Status = AmlGetNameStringSize (Buffer, DataSize);
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if (EFI_ERROR (Status)) {
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return EFI_INVALID_PARAMETER;
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}
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break;
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case AML_OBJECT:
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ChildAmlByteEncoding = AmlSearchByOpByte (Buffer);
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if (ChildAmlByteEncoding == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// NOTE: We need override DataType here, if there is a case the AML_OBJECT is AML_NAME.
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// We need convert type from EFI_ACPI_DATA_TYPE_CHILD to EFI_ACPI_DATA_TYPE_NAME_STRING.
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// We should not return CHILD because there is NO OpCode for NameString.
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//
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if ((ChildAmlByteEncoding->Attribute & AML_IS_NAME_CHAR) != 0) {
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if (DataType != NULL) {
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*DataType = AmlTypeToAcpiType (AML_NAME);
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}
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Status = AmlGetNameStringSize (Buffer, DataSize);
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if (EFI_ERROR (Status)) {
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return EFI_INVALID_PARAMETER;
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}
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break;
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}
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//
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// It is real AML_OBJECT
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//
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*DataSize = AmlGetObjectSize (
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ChildAmlByteEncoding,
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Buffer,
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MaxBufferSize
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);
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if (*DataSize == 0) {
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return EFI_INVALID_PARAMETER;
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}
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break;
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case AML_NONE:
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//
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// No term
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//
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case AML_OPCODE:
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default:
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// ASSERT (FALSE);
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return EFI_INVALID_PARAMETER;
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}
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if (*DataSize > MaxBufferSize) {
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return EFI_INVALID_PARAMETER;
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}
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return EFI_SUCCESS;
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}
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/**
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Retrieve information according to AmlByteEncoding and Buffer.
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@param[in] AmlByteEncoding AML Byte Encoding.
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@param[in] Buffer AML buffer.
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@param[in] MaxBufferSize AML buffer MAX size. The parser can not parse any data exceed this region.
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@param[in] Index Index of the data to retrieve from the object. In general, indexes read from left-to-right
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in the ACPI encoding, with index 0 always being the ACPI opcode.
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@param[out] DataType Points to the returned data type or EFI_ACPI_DATA_TYPE_NONE if no data exists
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for the specified index.
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@param[out] Data Upon return, points to the pointer to the data.
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@param[out] DataSize Upon return, points to the size of Data.
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@retval EFI_SUCCESS Success.
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@retval EFI_INVALID_PARAMETER Buffer does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlParseOptionCommon (
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IN AML_BYTE_ENCODING *AmlByteEncoding,
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IN UINT8 *Buffer,
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IN UINTN MaxBufferSize,
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IN AML_OP_PARSE_INDEX Index,
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OUT EFI_ACPI_DATA_TYPE *DataType,
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OUT VOID **Data,
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OUT UINTN *DataSize
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)
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{
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UINT8 *CurrentBuffer;
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UINTN PkgLength;
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UINTN OpLength;
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UINTN PkgOffset;
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AML_OP_PARSE_INDEX TermIndex;
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EFI_STATUS Status;
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// ASSERT ((Index <= AmlByteEncoding->MaxIndex) || (Index == AML_OP_PARSE_INDEX_GET_SIZE));
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if (!((Index <= AmlByteEncoding->MaxIndex) || (Index == AML_OP_PARSE_INDEX_GET_SIZE))) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// 0. Check if this is NAME string.
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//
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if ((AmlByteEncoding->Attribute & AML_IS_NAME_CHAR) != 0) {
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//
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// Only allow GET_SIZE
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//already checked
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/* if (Index != AML_OP_PARSE_INDEX_GET_SIZE) {
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return EFI_INVALID_PARAMETER;
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} */
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//
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// return NameString size
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//
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Status = AmlGetNameStringSize (Buffer, DataSize);
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if (EFI_ERROR (Status)) {
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return EFI_INVALID_PARAMETER;
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}
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if (*DataSize > MaxBufferSize) {
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return EFI_INVALID_PARAMETER;
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}
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return EFI_SUCCESS;
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}
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//
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// Not NAME string, start parsing
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//
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CurrentBuffer = Buffer;
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//
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// 1. Get OpCode
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//
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if (Index != AML_OP_PARSE_INDEX_GET_SIZE) {
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*DataType = EFI_ACPI_DATA_TYPE_OPCODE;
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*Data = (VOID *)CurrentBuffer;
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}
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if (*CurrentBuffer == AML_EXT_OP) {
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OpLength = 2;
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} else {
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OpLength = 1;
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}
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*DataSize = OpLength;
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if (Index == AML_OP_PARSE_INDEX_GET_OPCODE) {
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return EFI_SUCCESS;
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}
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if (OpLength > MaxBufferSize) {
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return EFI_INVALID_PARAMETER;
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}
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CurrentBuffer += OpLength;
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//
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// 2. Skip PkgLength field, if have
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//
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if ((AmlByteEncoding->Attribute & AML_HAS_PKG_LENGTH) != 0) {
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PkgOffset = AmlGetPkgLength(CurrentBuffer, &PkgLength);
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//
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// Override MaxBufferSize if it is valid PkgLength
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//
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if (OpLength + PkgLength > MaxBufferSize) {
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return EFI_INVALID_PARAMETER;
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} else {
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MaxBufferSize = OpLength + PkgLength;
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}
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} else {
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PkgOffset = 0;
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PkgLength = 0;
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}
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CurrentBuffer += PkgOffset;
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//
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// 3. Get Term one by one.
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//
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TermIndex = AML_OP_PARSE_INDEX_GET_TERM1;
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while ((Index >= TermIndex) && (TermIndex <= AmlByteEncoding->MaxIndex) && ((UINTN)CurrentBuffer < (UINTN)Buffer + MaxBufferSize)) {
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Status = AmlParseOptionTerm (
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AmlByteEncoding,
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CurrentBuffer,
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(UINTN)Buffer + MaxBufferSize - (UINTN)CurrentBuffer,
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TermIndex,
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DataType,
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Data,
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DataSize
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);
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if (EFI_ERROR (Status)) {
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return EFI_INVALID_PARAMETER;
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}
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if (Index == TermIndex) {
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//
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// Done
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//
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return EFI_SUCCESS;
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}
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//
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// Parse next one
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//
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CurrentBuffer += *DataSize;
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TermIndex ++;
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}
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//
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// Finish all options, but no option found.
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//
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if ((UINTN)CurrentBuffer > (UINTN)Buffer + MaxBufferSize) {
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return EFI_INVALID_PARAMETER;
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}
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if ((UINTN)CurrentBuffer == (UINTN)Buffer + MaxBufferSize) {
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if (Index != AML_OP_PARSE_INDEX_GET_SIZE) {
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return EFI_INVALID_PARAMETER;
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}
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}
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//
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// 4. Finish parsing all node, return size
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//
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// ASSERT (Index == AML_OP_PARSE_INDEX_GET_SIZE);
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if ((AmlByteEncoding->Attribute & AML_HAS_PKG_LENGTH) != 0) {
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*DataSize = OpLength + PkgLength;
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} else {
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*DataSize = (UINTN)CurrentBuffer - (UINTN)Buffer;
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}
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return EFI_SUCCESS;
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}
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/**
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Return object size.
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@param[in] AmlByteEncoding AML Byte Encoding.
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@param[in] Buffer AML object buffer.
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@param[in] MaxBufferSize AML object buffer MAX size. The parser can not parse any data exceed this region.
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@return Size of the object.
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**/
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UINTN
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AmlGetObjectSize (
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IN AML_BYTE_ENCODING *AmlByteEncoding,
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IN UINT8 *Buffer,
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IN UINTN MaxBufferSize
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)
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{
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EFI_STATUS Status;
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UINTN DataSize;
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Status = AmlParseOptionCommon (
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AmlByteEncoding,
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Buffer,
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MaxBufferSize,
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AML_OP_PARSE_INDEX_GET_SIZE,
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NULL,
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NULL,
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&DataSize
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);
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if (EFI_ERROR (Status)) {
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return 0;
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} else {
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return DataSize;
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}
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}
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/**
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Return object name.
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@param[in] AmlHandle AML handle.
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@return Name of the object.
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**/
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CHAR8 *
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AmlGetObjectName (
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IN EFI_AML_HANDLE *AmlHandle
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)
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{
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AML_BYTE_ENCODING *AmlByteEncoding;
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VOID *NameString;
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UINTN NameSize;
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AML_OP_PARSE_INDEX TermIndex;
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EFI_STATUS Status;
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EFI_ACPI_DATA_TYPE DataType;
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AmlByteEncoding = AmlHandle->AmlByteEncoding;
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// ASSERT ((AmlByteEncoding->Attribute & AML_IN_NAMESPACE) != 0);
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if ((AmlByteEncoding->Attribute & AML_IN_NAMESPACE) == 0) {
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return NULL;
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}
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//
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// Find out Last Name index, accroding to OpCode table.
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// The last name will be the node name by design.
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//
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TermIndex = AmlByteEncoding->MaxIndex;
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for (TermIndex = AmlByteEncoding->MaxIndex; TermIndex > 0; TermIndex--) {
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if (AmlByteEncoding->Format[TermIndex - 1] == AML_NAME) {
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break;
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}
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}
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// ASSERT (TermIndex != 0);
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if (TermIndex == 0) {
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eturn NULL;
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}
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//
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// Get Name for this node.
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//
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Status = AmlParseOptionHandleCommon (
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AmlHandle,
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TermIndex,
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&DataType,
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&NameString,
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&NameSize
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);
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if (EFI_ERROR (Status)) {
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return NULL;
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}
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// ASSERT (DataType == EFI_ACPI_DATA_TYPE_NAME_STRING);
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return NameString;
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}
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/**
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Return offset of last option.
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@param[in] AmlHandle AML Handle.
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@param[out] Buffer Upon return, points to the offset after last option.
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@retval EFI_SUCCESS Success.
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@retval EFI_INVALID_PARAMETER AmlHandle does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlGetOffsetAfterLastOption (
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IN EFI_AML_HANDLE *AmlHandle,
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OUT UINT8 **Buffer
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)
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{
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EFI_ACPI_DATA_TYPE DataType;
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VOID *Data;
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UINTN DataSize;
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EFI_STATUS Status;
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Status = AmlParseOptionHandleCommon (
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AmlHandle,
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AmlHandle->AmlByteEncoding->MaxIndex,
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&DataType,
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&Data,
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&DataSize
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);
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if (EFI_ERROR (Status)) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// We need to parse the rest buffer after last node.
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//
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*Buffer = (UINT8 *)((UINTN)Data + DataSize);
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//
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// We need skip PkgLength if no Option
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//
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if (DataType == EFI_ACPI_DATA_TYPE_OPCODE) {
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*Buffer += AmlGetPkgLength (*Buffer, &DataSize);
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}
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return EFI_SUCCESS;
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}
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/**
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Retrieve information according to AmlHandle
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@param[in] AmlHandle AML handle.
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@param[in] Index Index of the data to retrieve from the object. In general, indexes read from left-to-right
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in the ACPI encoding, with index 0 always being the ACPI opcode.
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@param[out] DataType Points to the returned data type or EFI_ACPI_DATA_TYPE_NONE if no data exists
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for the specified index.
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@param[out] Data Upon return, points to the pointer to the data.
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@param[out] DataSize Upon return, points to the size of Data.
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@retval EFI_SUCCESS Success.
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@retval EFI_INVALID_PARAMETER AmlHandle does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlParseOptionHandleCommon (
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IN EFI_AML_HANDLE *AmlHandle,
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IN AML_OP_PARSE_INDEX Index,
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OUT EFI_ACPI_DATA_TYPE *DataType,
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OUT VOID **Data,
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OUT UINTN *DataSize
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)
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{
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return AmlParseOptionCommon (
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AmlHandle->AmlByteEncoding,
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AmlHandle->Buffer,
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AmlHandle->Size,
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Index,
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DataType,
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Data,
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DataSize
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);
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}
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