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AcpiParser.c
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/** @file
Copyright (c) 2020-2021, Ubsefor & koralexa. All rights reserved.
Copyright (c) 2021, vit9696. All rights reserved.
SPDX-License-Identifier: BSD-3-Clause
**/
#include <Uefi.h>
#include <IndustryStandard/Acpi62.h>
#include <Library/OcAcpiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiLib.h>
#include <Library/UefiApplicationEntryPoint.h>
#include <Library/UefiBootServicesTableLib.h>
#include <IndustryStandard/AcpiAml.h>
#include "AcpiParser.h"
/**
Parses identifier or path (several identifiers). Returns info about
the identifier / path if necessary.
@param[in, out] Context Structure containing the parser context.
@param[in, out] NamePathStart Pointer to first opcode of identifier / path.
@param[in, out] PathLength Quantity of identifiers in path.
@param[in, out] IsRootPath 1 if parsed path was a root path, 0 otherwise.
@retval EFI_SUCCESS Name was parsed successfuly.
@retval EFI_DEVICE_ERROR Error occured during parsing.
@retval EFI_OUT_OF_RESOURCES Nesting limit has been reached.
**/
STATIC
EFI_STATUS
ParseNameString (
IN OUT ACPI_PARSER_CONTEXT *Context,
IN OUT UINT8 **NamePathStart OPTIONAL,
IN OUT UINT8 *PathLength OPTIONAL,
IN OUT UINT8 *IsRootPath OPTIONAL
)
{
CONTEXT_ENTER (Context, "NameString");
CONTEXT_HAS_WORK (Context);
CONTEXT_INCREASE_NESTING (Context);
if (IsRootPath != NULL) {
*IsRootPath = 0;
}
while (Context->CurrentOpcode[0] == AML_ROOT_CHAR || Context->CurrentOpcode[0] == AML_PARENT_PREFIX_CHAR) {
if ((Context->CurrentOpcode[0] == AML_ROOT_CHAR) && (IsRootPath != NULL)) {
*IsRootPath = 1;
}
CONTEXT_ADVANCE_OPCODE (Context);
}
switch (Context->CurrentOpcode[0]) {
case AML_ZERO_OP:
if (NamePathStart != NULL) {
*PathLength = 0;
*NamePathStart = NULL;
}
Context->CurrentOpcode += 1;
break;
case AML_DUAL_NAME_PREFIX:
CONTEXT_ADVANCE_OPCODE (Context);
CONTEXT_PEEK_BYTES (Context, 2 * IDENT_LEN);
if (NamePathStart != NULL) {
*PathLength = 2;
*NamePathStart = Context->CurrentOpcode;
}
Context->CurrentOpcode += 2 * IDENT_LEN;
break;
case AML_MULTI_NAME_PREFIX:
CONTEXT_ADVANCE_OPCODE (Context);
CONTEXT_PEEK_BYTES (Context, 1 + Context->CurrentOpcode[0] * IDENT_LEN);
if (NamePathStart != NULL) {
*PathLength = Context->CurrentOpcode[0];
*NamePathStart = Context->CurrentOpcode + 1;
}
Context->CurrentOpcode += 1 + Context->CurrentOpcode[0] * IDENT_LEN;
break;
default:
CONTEXT_PEEK_BYTES (Context, IDENT_LEN);
if (NamePathStart != NULL) {
*PathLength = 1;
*NamePathStart = Context->CurrentOpcode;
}
Context->CurrentOpcode += IDENT_LEN;
}
if (NamePathStart != NULL) {
PRINT_ACPI_NAME ("Read name", *NamePathStart, *PathLength);
}
CONTEXT_DECREASE_NESTING (Context);
return EFI_SUCCESS;
}
/**
Parses package length (length of current section).
@param[in, out] Context Structure containing the parser context.
@param[out] PkgLength Total length of section.
@retval EFI_SUCCESS Length was parsed successfuly.
@retval EFI_DEVICE_ERROR Error occured during parsing length.
@retval EFI_OUT_OF_RESOURCES Nesting limit has been reached.
**/
STATIC
EFI_STATUS
ParsePkgLength (
IN OUT ACPI_PARSER_CONTEXT *Context,
OUT UINT32 *PkgLength
)
{
UINT8 LeadByte;
UINT8 ByteCount;
UINT32 TotalSize;
UINT32 Index;
CONTEXT_ENTER (Context, "PkgLength");
CONTEXT_HAS_WORK (Context);
CONTEXT_INCREASE_NESTING (Context);
LeadByte = Context->CurrentOpcode[0];
TotalSize = 0;
ByteCount = (LeadByte & 0xC0) >> 6;
CONTEXT_CONSUME_BYTES (Context, 1);
if (ByteCount > 0) {
CONTEXT_PEEK_BYTES (Context, ByteCount);
for (Index = 0; Index < ByteCount; Index++) {
TotalSize |= (UINT32)Context->CurrentOpcode[Index] << (Index * 8U + 4);
}
TotalSize |= LeadByte & 0x0F;
*PkgLength = TotalSize;
CONTEXT_CONSUME_BYTES (Context, ByteCount);
} else {
*PkgLength = (UINT32)LeadByte;
}
CONTEXT_DECREASE_NESTING (Context);
return EFI_SUCCESS;
}
/**
Parses alias section to skip it correctly.
@param[in, out] Context Structure containing the parser context.
@retval EFI_NOT_FOUND Alias was parsed and skipped successfuly.
@retval EFI_DEVICE_ERROR Error occured during parsing alias.
@retval EFI_OUT_OF_RESOURCES Nesting limit has been reached.
**/
STATIC
EFI_STATUS
ParseAlias (
IN OUT ACPI_PARSER_CONTEXT *Context
)
{
CONTEXT_ENTER (Context, "Alias");
CONTEXT_HAS_WORK (Context);
CONTEXT_INCREASE_NESTING (Context);
if (ParseNameString (
Context,
NULL,
NULL,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
CONTEXT_PEEK_BYTES (Context, 1);
if (ParseNameString (
Context,
NULL,
NULL,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
}
/**
Parses scope or device section. In case it's name is suitable parses
elements inside it, or returns pointer to it's opcode if this scope / device
was sought. Otherwise skips this section.
@param[in, out] Context Structure containing the parser context.
@param[out] Result Pointer to sought opcode if required entry was found.
@retval EFI_SUCCESS Required entry was found.
@retval EFI_NOT_FOUND Scope / device was parsed and skipped successfuly.
@retval EFI_DEVICE_ERROR Error occured during parsing scope / device.
@retval EFI_OUT_OF_RESOURCES Nesting limit has been reached.
**/
STATIC
EFI_STATUS
ParseScopeOrDevice (
IN OUT ACPI_PARSER_CONTEXT *Context,
OUT UINT8 **Result
)
{
UINT32 PkgLength;
UINT8 *ScopeStart;
UINT32 *CurrentPath;
UINT8 *ScopeEnd;
UINT8 *ScopeName;
UINT8 *ScopeNameStart;
UINT8 ScopeNameLength;
UINT8 IsRootPath;
EFI_STATUS Status;
UINT8 Index;
UINT8 Index2;
BOOLEAN Breakout;
CONTEXT_ENTER (Context, "Scope / Device");
CONTEXT_HAS_WORK (Context);
CONTEXT_INCREASE_NESTING (Context);
ScopeStart = Context->CurrentOpcode;
CurrentPath = Context->CurrentIdentifier;
if (ParsePkgLength (
Context,
&PkgLength
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
if ((UINT32)(Context->TableEnd - ScopeStart) < PkgLength) {
return EFI_DEVICE_ERROR;
}
ScopeEnd = ScopeStart + PkgLength;
CONTEXT_PEEK_BYTES (Context, 1);
if (ParseNameString (
Context,
&ScopeName,
&ScopeNameLength,
&IsRootPath
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
ScopeNameStart = ScopeName;
if (Context->CurrentOpcode > ScopeEnd) {
return EFI_DEVICE_ERROR;
}
if (IsRootPath) {
Context->CurrentIdentifier = Context->PathStart;
}
//
// Both exit conditions in these loops are for cases when there can be
// root-relative scopes within the current scope that does not match ours at all.
//
Breakout = FALSE;
for (Index = 0; Index < ScopeNameLength; ++Index) {
if (Context->CurrentIdentifier == Context->PathEnd) {
Context->CurrentIdentifier = Context->PathStart;
break;
}
for (Index2 = 0; Index2 < IDENT_LEN; ++Index2) {
if (*(ScopeName + Index2) != *((UINT8 *)Context->CurrentIdentifier + (IDENT_LEN - Index2 - 1))) {
Context->CurrentIdentifier = Context->PathStart;
Breakout = TRUE;
break;
}
}
if (Breakout) {
break;
}
Context->CurrentIdentifier += 1;
ScopeName += 4;
}
if (Context->CurrentIdentifier == Context->PathEnd) {
Context->EntriesFound += 1;
if (Context->EntriesFound == Context->RequiredEntry) {
*Result = ScopeStart - 1;
return EFI_SUCCESS;
}
//
// Same issue with root-relative scopes. Retry search.
//
Context->CurrentIdentifier = Context->PathStart;
}
PRINT_ACPI_NAME ("Entered scope", ScopeNameStart, ScopeNameLength);
while (Context->CurrentOpcode < ScopeEnd) {
Status = InternalAcpiParseTerm (
Context,
Result
);
if (Status != EFI_NOT_FOUND) {
return Status;
}
}
PRINT_ACPI_NAME ("Left scope", ScopeNameStart, ScopeNameLength);
Context->CurrentIdentifier = CurrentPath;
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
}
/**
Parses name section to correctly skip it.
@param[in, out] Context Structure containing the parser context.
@retval EFI_NOT_FOUND Name was parsed and skipped successfuly.
@retval EFI_DEVICE_ERROR Error occured during parsing name.
@retval EFI_OUT_OF_RESOURCES Nesting limit has been reached.
**/
STATIC
EFI_STATUS
ParseName (
IN OUT ACPI_PARSER_CONTEXT *Context
)
{
UINT32 PkgLength;
UINT8 *CurrentOpcode;
CONTEXT_ENTER (Context, "Name");
CONTEXT_HAS_WORK (Context);
CONTEXT_INCREASE_NESTING (Context);
if (ParseNameString (
Context,
NULL,
NULL,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
CONTEXT_PEEK_BYTES (Context, 1);
switch (Context->CurrentOpcode[0]) {
case AML_BYTE_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 2);
break;
case AML_WORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 3);
break;
case AML_DWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 5);
break;
case AML_QWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 9);
break;
case AML_STRING_PREFIX:
do {
CONTEXT_ADVANCE_OPCODE (Context);
} while (Context->CurrentOpcode[0] >= 0x01 && Context->CurrentOpcode[0] <= 0x7f);
if (Context->CurrentOpcode[0] != AML_ZERO_OP) {
return EFI_DEVICE_ERROR;
}
CONTEXT_CONSUME_BYTES (Context, 1);
break;
case AML_ZERO_OP:
case AML_ONE_OP:
case AML_ONES_OP:
CONTEXT_CONSUME_BYTES (Context, 1);
break;
case AML_EXT_OP:
CONTEXT_CONSUME_BYTES (Context, 2);
break;
case AML_BUFFER_OP:
case AML_PACKAGE_OP:
case AML_VAR_PACKAGE_OP:
CONTEXT_ADVANCE_OPCODE (Context);
CurrentOpcode = Context->CurrentOpcode;
if (ParsePkgLength (
Context,
&PkgLength
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
Context->CurrentOpcode = CurrentOpcode;
CONTEXT_CONSUME_BYTES (Context, PkgLength);
break;
default:
return EFI_DEVICE_ERROR;
}
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
}
/**
Parses bank field section. In case it's name is suitable returns
pointer to it's opcode. Otherwise skips this section.
@param[in, out] Context Structure containing the parser context.
@param[out] Result Pointer to sought opcode if required entry was found.
@retval EFI_SUCCESS Required entry was found.
@retval EFI_NOT_FOUND Bank field was parsed and skipped successfuly.
@retval EFI_DEVICE_ERROR Error occured during parsing bank field.
@retval EFI_OUT_OF_RESOURCES Nesting limit has been reached.
**/
STATIC
EFI_STATUS
ParseBankField (
IN OUT ACPI_PARSER_CONTEXT *Context,
OUT UINT8 **Result
)
{
UINT32 PkgLength;
UINT8 *BankStart;
UINT8 *BankEnd;
UINT8 *Name;
UINT8 NameLength;
UINT8 Index;
CONTEXT_ENTER (Context, "BankField");
CONTEXT_HAS_WORK (Context);
CONTEXT_INCREASE_NESTING (Context);
BankStart = Context->CurrentOpcode;
if (ParsePkgLength (
Context,
&PkgLength
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
if ((UINT32)(Context->TableEnd - BankStart) < PkgLength) {
return EFI_DEVICE_ERROR;
}
BankEnd = BankStart + PkgLength;
CONTEXT_PEEK_BYTES (Context, 1);
if (ParseNameString (
Context,
&Name,
&NameLength,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
if (Context->CurrentOpcode >= BankEnd) {
return EFI_DEVICE_ERROR;
}
if (NameLength != 1) {
return EFI_DEVICE_ERROR;
}
for (Index = 0; Index < IDENT_LEN; ++Index) {
if (*(Name + Index) != *((UINT8 *)Context->CurrentIdentifier + (IDENT_LEN - Index - 1))) {
Context->CurrentOpcode = BankEnd;
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
}
}
Context->CurrentIdentifier += 1;
CONTEXT_PEEK_BYTES (Context, 1);
if (Context->CurrentIdentifier == Context->PathEnd) {
//
// FIXME: This looks weird. If it is a match, should not it return success?
//
Context->CurrentIdentifier -= 1;
if (ParseNameString (
Context,
&Name,
&NameLength,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
Context->CurrentOpcode = BankEnd;
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
}
if (ParseNameString (
Context,
&Name,
&NameLength,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
if (Context->CurrentOpcode > BankEnd) {
return EFI_DEVICE_ERROR;
}
if (NameLength != 1) {
return EFI_DEVICE_ERROR;
}
for (Index = 0; Index < IDENT_LEN; ++Index) {
if (*(Name + Index) != *((UINT8 *)Context->CurrentIdentifier + (IDENT_LEN - Index - 1))) {
Context->CurrentOpcode = BankEnd;
Context->CurrentIdentifier -= 1;
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
}
}
if (Context->CurrentIdentifier + 1 != Context->PathEnd) {
Context->CurrentOpcode = BankEnd;
Context->CurrentIdentifier -= 1;
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
}
Context->EntriesFound += 1;
if (Context->EntriesFound != Context->RequiredEntry) {
Context->CurrentOpcode = BankEnd;
Context->CurrentIdentifier -= 1;
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
}
*Result = BankStart - 1;
return EFI_SUCCESS;
}
/**
Parses create field section (any of CreateDwordField, CreateWordField,
CreateByteField, CreateBitField, CreateQWordField, CreateField sections).
In case it's name is suitable returns pointer to it's opcode.
Otherwise skips this section.
@param[in, out] Context Structure containing the parser context.
@param[out] Result Pointer to sought opcode if required entry was found.
@retval EFI_SUCCESS Required entry was found.
@retval EFI_NOT_FOUND Field was parsed and skipped successfuly.
@retval EFI_DEVICE_ERROR Error occured during parsing field.
@retval EFI_OUT_OF_RESOURCES Nesting limit has been reached.
**/
STATIC
EFI_STATUS
ParseCreateField (
IN OUT ACPI_PARSER_CONTEXT *Context,
OUT UINT8 **Result
)
{
UINT8 *FieldStart;
UINT8 *FieldOpcode;
UINT8 *Name;
UINT8 NameLength;
UINT8 Index;
BOOLEAN Matched;
CONTEXT_ENTER (Context, "CreateField");
CONTEXT_HAS_WORK (Context);
CONTEXT_INCREASE_NESTING (Context);
FieldStart = Context->CurrentOpcode;
FieldOpcode = Context->CurrentOpcode - 1;
switch (Context->CurrentOpcode[0]) {
case AML_ARG0:
case AML_ARG1:
case AML_ARG2:
case AML_ARG3:
case AML_ARG4:
case AML_ARG5:
case AML_ARG6:
CONTEXT_CONSUME_BYTES (Context, 5);
if (*FieldOpcode == AML_EXT_CREATE_FIELD_OP) {
CONTEXT_CONSUME_BYTES (Context, 4);
}
CONTEXT_PEEK_BYTES (Context, 1);
if (ParseNameString (
Context,
NULL,
NULL,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
default:
if (ParseNameString (
Context,
&Name,
&NameLength,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
if (NameLength != 1) {
return EFI_DEVICE_ERROR;
}
Matched = TRUE;
for (Index = 0; Index < IDENT_LEN; Index++) {
if (*(Name + Index) != *((UINT8 *)Context->CurrentIdentifier + (IDENT_LEN - Index - 1))) {
Matched = FALSE;
break;
}
}
CONTEXT_PEEK_BYTES (Context, 1);
switch (Context->CurrentOpcode[0]) {
case AML_ZERO_OP:
case AML_ONE_OP:
CONTEXT_CONSUME_BYTES (Context, 1);
break;
case AML_BYTE_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 2);
break;
case AML_WORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 3);
break;
case AML_DWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 5);
break;
case AML_QWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 9);
break;
}
if (*FieldOpcode == AML_EXT_CREATE_FIELD_OP) {
CONTEXT_CONSUME_BYTES (Context, 1);
}
CONTEXT_PEEK_BYTES (Context, 1);
if (ParseNameString (
Context,
&Name,
&NameLength,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
if (NameLength != 1) {
return EFI_DEVICE_ERROR;
}
if (!Matched) {
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
}
Context->CurrentIdentifier += 1;
for (Index = 0; Index < IDENT_LEN; Index++) {
if (*(Name + Index) != *((UINT8 *)Context->CurrentIdentifier + (IDENT_LEN - Index - 1))) {
CONTEXT_DECREASE_NESTING (Context);
Context->CurrentIdentifier--;
return EFI_NOT_FOUND;
}
}
Context->CurrentIdentifier += 1;
if (Context->CurrentIdentifier != Context->PathEnd) {
CONTEXT_DECREASE_NESTING (Context);
Context->CurrentIdentifier -= 2;
return EFI_NOT_FOUND;
}
Context->EntriesFound += 1;
if (Context->EntriesFound != Context->RequiredEntry) {
CONTEXT_DECREASE_NESTING (Context);
Context->CurrentIdentifier -= 2;
return EFI_NOT_FOUND;
}
*Result = FieldStart - 1;
return EFI_SUCCESS;
}
}
/**
Parses external section to correctly skip it.
@param[in, out] Context Structure containing the parser context.
@retval EFI_NOT_FOUND External was parsed and skipped successfuly.
@retval EFI_DEVICE_ERROR Error occured during parsing external.
@retval EFI_OUT_OF_RESOURCES Nesting limit has been reached.
**/
STATIC
EFI_STATUS
ParseExternal (
IN OUT ACPI_PARSER_CONTEXT *Context
)
{
CONTEXT_ENTER (Context, "External");
CONTEXT_HAS_WORK (Context);
CONTEXT_INCREASE_NESTING (Context);
if (ParseNameString (
Context,
NULL,
NULL,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
CONTEXT_CONSUME_BYTES (Context, 2);
CONTEXT_DECREASE_NESTING (Context);
return EFI_NOT_FOUND;
}
/**
Parses operation region to skip it correctly.
@param[in, out] Context Structure containing the parser context.
@retval EFI_NOT_FOUND OpRegion was parsed and skipped successfuly.
@retval EFI_DEVICE_ERROR Error occured during parsing OpRegion.
@retval EFI_OUT_OF_RESOURCES Nesting limit has been reached.
**/
STATIC
EFI_STATUS
ParseOpRegion (
IN OUT ACPI_PARSER_CONTEXT *Context
)
{
CONTEXT_ENTER (Context, "OpRegion");
CONTEXT_HAS_WORK (Context);
CONTEXT_INCREASE_NESTING (Context);
if (ParseNameString (
Context,
NULL,
NULL,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
CONTEXT_ADVANCE_OPCODE (Context);
switch (Context->CurrentOpcode[0]) {
case AML_ZERO_OP:
case AML_ONE_OP:
CONTEXT_CONSUME_BYTES (Context, 1);
break;
case AML_BYTE_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 2);
break;
case AML_WORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 3);
break;
case AML_DWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 5);
break;
case AML_QWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 9);
break;
case AML_ADD_OP:
case AML_SUBTRACT_OP:
CONTEXT_ADVANCE_OPCODE (Context);
switch (Context->CurrentOpcode[0]) {
case AML_ZERO_OP:
case AML_ONE_OP:
CONTEXT_CONSUME_BYTES (Context, 1);
break;
case AML_BYTE_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 2);
break;
case AML_WORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 3);
break;
case AML_DWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 5);
break;
case AML_QWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 9);
break;
default:
if (ParseNameString (
Context,
NULL,
NULL,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
break;
}
CONTEXT_PEEK_BYTES (Context, 1);
switch (Context->CurrentOpcode[0]) {
case AML_ZERO_OP:
case AML_ONE_OP:
CONTEXT_CONSUME_BYTES (Context, 1);
break;
case AML_BYTE_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 2);
break;
case AML_WORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 3);
break;
case AML_DWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 5);
break;
case AML_QWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 9);
break;
default:
if (ParseNameString (
Context,
NULL,
NULL,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
break;
}
CONTEXT_PEEK_BYTES (Context, 1);
/* Fallthrough */
default:
if (ParseNameString (
Context,
NULL,
NULL,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
break;
}
CONTEXT_PEEK_BYTES (Context, 1);
switch (Context->CurrentOpcode[0]) {
case AML_ZERO_OP:
case AML_ONE_OP:
CONTEXT_CONSUME_BYTES (Context, 1);
break;
case AML_BYTE_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 2);
break;
case AML_WORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 3);
break;
case AML_DWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 5);
break;
case AML_QWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 9);
break;
case AML_ADD_OP:
case AML_SUBTRACT_OP:
CONTEXT_ADVANCE_OPCODE (Context);
switch (Context->CurrentOpcode[0]) {
case AML_ZERO_OP:
case AML_ONE_OP:
CONTEXT_CONSUME_BYTES (Context, 1);
break;
case AML_BYTE_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 2);
break;
case AML_WORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 3);
break;
case AML_DWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 5);
break;
case AML_QWORD_PREFIX:
CONTEXT_CONSUME_BYTES (Context, 9);
break;
default:
if (ParseNameString (
Context,
NULL,
NULL,
NULL
) != EFI_SUCCESS)
{
return EFI_DEVICE_ERROR;
}
break;
}