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system76-edk2/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlResourceDataCodeGen.c
Pierre Gondois 1729fb8a82 DynamicTablesPkg/AmlLib: Allow larger AccessSize for Pcc address space 
For Pcc address space, the AccessSize field of a Register is
used to delcare the Pcc Subspace Id. This Id can be up to 256.

Cf. ACPI 6.4, s14.7 Referencing the PCC address space

Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
2022-10-31 12:32:32 +00:00

1414 lines
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/** @file
AML Resource Data Code Generation.
Copyright (c) 2020 - 2021, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Glossary:
- Rd or RD - Resource Data
- Rds or RDS - Resource Data Small
- Rdl or RDL - Resource Data Large
**/
#include <AmlNodeDefines.h>
#include <CodeGen/AmlResourceDataCodeGen.h>
#include <AmlCoreInterface.h>
#include <AmlDefines.h>
#include <Api/AmlApiHelper.h>
#include <Tree/AmlNode.h>
#include <ResourceData/AmlResourceData.h>
/** If ParentNode is not NULL, append RdNode.
If NewRdNode is not NULL, update its value to RdNode.
@param [in] RdNode Newly created Resource Data node.
RdNode is deleted if an error occurs.
@param [in] ParentNode If not NULL, ParentNode must:
- be a NameOp node, i.e. have the AML_NAME_OP
opcode (cf "Name ()" ASL statement)
- contain a list of resource data elements
(cf "ResourceTemplate ()" ASL statement)
RdNode is then added at the end of the variable
list of resource data elements, but before the
"End Tag" Resource Data.
@param [out] NewRdNode If not NULL:
- and Success, contains RdNode.
- and Error, reset to NULL.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
**/
STATIC
EFI_STATUS
EFIAPI
LinkRdNode (
IN AML_DATA_NODE *RdNode,
IN AML_OBJECT_NODE *ParentNode,
OUT AML_DATA_NODE **NewRdNode
)
{
EFI_STATUS Status;
EFI_STATUS Status1;
AML_OBJECT_NODE *BufferOpNode;
if (NewRdNode != NULL) {
*NewRdNode = NULL;
}
if (ParentNode != NULL) {
// Check this is a NameOp node.
if ((!AmlNodeHasOpCode (ParentNode, AML_NAME_OP, 0))) {
ASSERT (0);
Status = EFI_INVALID_PARAMETER;
goto error_handler;
}
// Get the value which is represented as a BufferOp object node
// which is the 2nd fixed argument (i.e. index 1).
BufferOpNode = (AML_OBJECT_NODE_HANDLE)AmlGetFixedArgument (
ParentNode,
EAmlParseIndexTerm1
);
if ((BufferOpNode == NULL) ||
(AmlGetNodeType ((AML_NODE_HANDLE)BufferOpNode) != EAmlNodeObject) ||
(!AmlNodeHasOpCode (BufferOpNode, AML_BUFFER_OP, 0)))
{
ASSERT (0);
Status = EFI_INVALID_PARAMETER;
goto error_handler;
}
// Add RdNode as the last element, but before the EndTag.
Status = AmlAppendRdNode (BufferOpNode, RdNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
}
if (NewRdNode != NULL) {
*NewRdNode = RdNode;
}
return EFI_SUCCESS;
error_handler:
Status1 = AmlDeleteTree ((AML_NODE_HEADER *)RdNode);
ASSERT_EFI_ERROR (Status1);
// Return original error.
return Status;
}
/** Construct the TypeSpecificFlags field for IO ranges.
See ACPI 6.4 spec, s19.6.34 for more.
@param [in] IsaRanges Possible values are:
0-Reserved
1-NonISAOnly
2-ISAOnly
3-EntireRange
See ACPI 6.4 spec, s19.6.34 for more.
@param [in] IsDenseTranslation TranslationDensity parameter.
@param [in] IsTypeStatic TranslationType parameter.
@return A type specific flags value.
MAX_UINT8 if error.
**/
STATIC
UINT8
EFIAPI
RdIoRangeSpecificFlags (
IN UINT8 IsaRanges,
IN BOOLEAN IsDenseTranslation,
IN BOOLEAN IsTypeStatic
)
{
// Only check type specific parameters.
if (IsaRanges > 3) {
ASSERT (0);
return MAX_UINT8;
}
// Construct TypeSpecificFlags and call the generic function.
// Cf ACPI 6.4 specification, Table 6.50:
// "Table 6.50: I/O Resource Flag (Resource Type = 1) Definitions"
return IsaRanges |
(IsTypeStatic ? 0 : BIT4) |
(IsDenseTranslation ? 0 : BIT5);
}
/** Construct the TypeSpecificFlags field for Memory ranges.
@param [in] Cacheable Possible values are:
0-The memory is non-cacheable
1-The memory is cacheable
2-The memory is cacheable and supports
write combining
3-The memory is cacheable and prefetchable
@param [in] IsReadWrite ReadAndWrite parameter.
@param [in] MemoryRangeType Possible values are:
0-AddressRangeMemory
1-AddressRangeReserved
2-AddressRangeACPI
3-AddressRangeNVS
See ACPI 6.4 spec, s19.6.35 for more.
@param [in] IsTypeStatic TranslationType parameter.
@return A type specific flags value.
MAX_UINT8 if error.
**/
STATIC
UINT8
EFIAPI
MemoryRangeSpecificFlags (
IN UINT8 Cacheable,
IN BOOLEAN IsReadWrite,
IN UINT8 MemoryRangeType,
IN BOOLEAN IsTypeStatic
)
{
// Only check type specific parameters.
if ((Cacheable > 3) ||
(MemoryRangeType > 3))
{
ASSERT (0);
return MAX_UINT8;
}
// Construct TypeSpecificFlags and call the generic function.
// Cf ACPI 6.4 specification, Table 6.49:
// "Memory Resource Flag (Resource Type = 0) Definitions"
return (IsReadWrite ? BIT0 : 0) |
(Cacheable << 1) |
(MemoryRangeType << 3) |
(IsTypeStatic ? 0 : BIT5);
}
/** Construct the GeneralFlags field of any Address Space Resource Descriptors.
E.g.:
ACPI 6.4 specification, s6.4.3.5.1 "QWord Address Space Descriptor"
for QWord
See ACPI 6.4 spec, s19.6.36 for more.
@param [in] IsPosDecode Decode parameter
@param [in] IsMinFixed Minimum address is fixed.
@param [in] IsMaxFixed Maximum address is fixed.
@return A type specific flags value.
**/
STATIC
UINT8
EFIAPI
AddressSpaceGeneralFlags (
IN BOOLEAN IsPosDecode,
IN BOOLEAN IsMinFixed,
IN BOOLEAN IsMaxFixed
)
{
return (IsPosDecode ? 0 : BIT1) |
(IsMinFixed ? BIT2 : 0) |
(IsMaxFixed ? BIT3 : 0);
}
/** Check Address Space Descriptor Fields.
Cf. ACPI 6.4 Table 6.44:
"Valid Combination of Address Space Descriptor Fields"
See ACPI 6.4 spec, s19.6.36 for more.
@param [in] IsMinFixed Minimum address is fixed.
@param [in] IsMaxFixed Maximum address is fixed.
@param [in] AddressGranularity Address granularity.
@param [in] AddressMinimum Minimum address.
@param [in] AddressMaximum Maximum address.
@param [in] AddressTranslation Address translation.
@param [in] RangeLength Range length.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
**/
STATIC
EFI_STATUS
EFIAPI
CheckAddressSpaceFields (
IN BOOLEAN IsMinFixed,
IN BOOLEAN IsMaxFixed,
IN UINT64 AddressGranularity,
IN UINT64 AddressMinimum,
IN UINT64 AddressMaximum,
IN UINT64 AddressTranslation,
IN UINT64 RangeLength
)
{
if ((AddressMinimum > AddressMaximum) ||
(RangeLength > (AddressMaximum - AddressMinimum + 1)) ||
((AddressGranularity != 0) &&
(((AddressGranularity + 1) & AddressGranularity) != 0)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
if (RangeLength != 0) {
if (IsMinFixed ^ IsMaxFixed) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
} else if (IsMinFixed &&
IsMaxFixed &&
(AddressGranularity != 0) &&
((AddressMaximum - AddressMinimum + 1) != RangeLength))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
} else {
if (IsMinFixed && IsMaxFixed) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
} else if (IsMinFixed &&
((AddressMinimum & AddressGranularity) != 0))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
} else if (IsMaxFixed &&
(((AddressMaximum + 1) & AddressGranularity) != 0))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
}
return EFI_SUCCESS;
}
/** Code generation for the "DWordSpace ()" ASL function.
The Resource Data effectively created is a DWord Address Space Resource
Data. Cf ACPI 6.4:
- s6.4.3.5.2 "DWord Address Space Descriptor".
- s19.6.36 "DWordSpace".
The created resource data node can be:
- appended to the list of resource data elements of the NameOpNode.
In such case NameOpNode must be defined by a the "Name ()" ASL statement
and initially contain a "ResourceTemplate ()".
- returned through the NewRdNode parameter.
See ACPI 6.4 spec, s19.6.36 for more.
@param [in] ResourceType Resource type.
Possible values are:
0: Memory range
1: I/O range
2: Bus number range
3-191: Reserved
192-255: Hardware Vendor Defined
See ACPI 6.4 spec, s6.4.3.5.2 for more.
@param [in] IsResourceConsumer ResourceUsage parameter.
@param [in] IsPosDecode Decode parameter
@param [in] IsMinFixed Minimum address is fixed.
@param [in] IsMaxFixed Maximum address is fixed.
@param [in] TypeSpecificFlags Type specific flags.
See ACPI 6.4 spec, s6.4.3.5.5
"Resource Type Specific Flags".
@param [in] AddressGranularity Address granularity.
@param [in] AddressMinimum Minimum address.
@param [in] AddressMaximum Maximum address.
@param [in] AddressTranslation Address translation.
@param [in] RangeLength Range length.
@param [in] ResourceSourceIndex Resource Source index.
Unused. Must be 0.
@param [in] ResourceSource Resource Source.
Unused. Must be NULL.
@param [in] NameOpNode NameOp object node defining a named object.
If provided, append the new resource data
node to the list of resource data elements
of this node.
@param [out] NewRdNode If provided and success,
contain the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenRdDWordSpace (
IN UINT8 ResourceType,
IN BOOLEAN IsResourceConsumer,
IN BOOLEAN IsPosDecode,
IN BOOLEAN IsMinFixed,
IN BOOLEAN IsMaxFixed,
IN UINT8 TypeSpecificFlags,
IN UINT32 AddressGranularity,
IN UINT32 AddressMinimum,
IN UINT32 AddressMaximum,
IN UINT32 AddressTranslation,
IN UINT32 RangeLength,
IN UINT8 ResourceSourceIndex,
IN CONST CHAR8 *ResourceSource,
IN AML_OBJECT_NODE_HANDLE NameOpNode, OPTIONAL
OUT AML_DATA_NODE_HANDLE *NewRdNode OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *RdNode;
EFI_ACPI_DWORD_ADDRESS_SPACE_DESCRIPTOR RdDWord;
// ResourceSource and ResourceSourceIndex are unused.
if ((TypeSpecificFlags == MAX_UINT8) ||
(ResourceSourceIndex != 0) ||
(ResourceSource != NULL) ||
((NameOpNode == NULL) && (NewRdNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Status = CheckAddressSpaceFields (
IsMinFixed,
IsMaxFixed,
AddressGranularity,
AddressMinimum,
AddressMaximum,
AddressTranslation,
RangeLength
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Header
RdDWord.Header.Header.Bits.Name =
ACPI_LARGE_DWORD_ADDRESS_SPACE_DESCRIPTOR_NAME;
RdDWord.Header.Header.Bits.Type = ACPI_LARGE_ITEM_FLAG;
RdDWord.Header.Length = sizeof (EFI_ACPI_DWORD_ADDRESS_SPACE_DESCRIPTOR) -
sizeof (ACPI_LARGE_RESOURCE_HEADER);
// Body
RdDWord.ResType = ResourceType;
RdDWord.GenFlag = AddressSpaceGeneralFlags (
IsPosDecode,
IsMinFixed,
IsMaxFixed
);
RdDWord.SpecificFlag = TypeSpecificFlags;
RdDWord.AddrSpaceGranularity = AddressGranularity;
RdDWord.AddrRangeMin = AddressMinimum;
RdDWord.AddrRangeMax = AddressMaximum;
RdDWord.AddrTranslationOffset = AddressTranslation;
RdDWord.AddrLen = RangeLength;
Status = AmlCreateDataNode (
EAmlNodeDataTypeResourceData,
(UINT8 *)&RdDWord,
sizeof (EFI_ACPI_DWORD_ADDRESS_SPACE_DESCRIPTOR),
&RdNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
return LinkRdNode (RdNode, NameOpNode, NewRdNode);
}
/** Code generation for the "DWordIO ()" ASL function.
The Resource Data effectively created is a DWord Address Space Resource
Data. Cf ACPI 6.4:
- s6.4.3.5.2 "DWord Address Space Descriptor".
- s19.6.34 "DWordIO".
The created resource data node can be:
- appended to the list of resource data elements of the NameOpNode.
In such case NameOpNode must be defined by a the "Name ()" ASL statement
and initially contain a "ResourceTemplate ()".
- returned through the NewRdNode parameter.
See ACPI 6.4 spec, s19.6.34 for more.
@param [in] IsResourceConsumer ResourceUsage parameter.
@param [in] IsMinFixed Minimum address is fixed.
@param [in] IsMaxFixed Maximum address is fixed.
@param [in] IsPosDecode Decode parameter
@param [in] IsaRanges Possible values are:
0-Reserved
1-NonISAOnly
2-ISAOnly
3-EntireRange
@param [in] AddressGranularity Address granularity.
@param [in] AddressMinimum Minimum address.
@param [in] AddressMaximum Maximum address.
@param [in] AddressTranslation Address translation.
@param [in] RangeLength Range length.
@param [in] ResourceSourceIndex Resource Source index.
Unused. Must be 0.
@param [in] ResourceSource Resource Source.
Unused. Must be NULL.
@param [in] IsDenseTranslation TranslationDensity parameter.
@param [in] IsTypeStatic TranslationType parameter.
@param [in] NameOpNode NameOp object node defining a named object.
If provided, append the new resource data
node to the list of resource data elements
of this node.
@param [out] NewRdNode If provided and success,
contain the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenRdDWordIo (
IN BOOLEAN IsResourceConsumer,
IN BOOLEAN IsMinFixed,
IN BOOLEAN IsMaxFixed,
IN BOOLEAN IsPosDecode,
IN UINT8 IsaRanges,
IN UINT32 AddressGranularity,
IN UINT32 AddressMinimum,
IN UINT32 AddressMaximum,
IN UINT32 AddressTranslation,
IN UINT32 RangeLength,
IN UINT8 ResourceSourceIndex,
IN CONST CHAR8 *ResourceSource,
IN BOOLEAN IsDenseTranslation,
IN BOOLEAN IsTypeStatic,
IN AML_OBJECT_NODE_HANDLE NameOpNode, OPTIONAL
OUT AML_DATA_NODE_HANDLE *NewRdNode OPTIONAL
)
{
return AmlCodeGenRdDWordSpace (
ACPI_ADDRESS_SPACE_TYPE_IO,
IsResourceConsumer,
IsPosDecode,
IsMinFixed,
IsMaxFixed,
RdIoRangeSpecificFlags (
IsaRanges,
IsDenseTranslation,
IsTypeStatic
),
AddressGranularity,
AddressMinimum,
AddressMaximum,
AddressTranslation,
RangeLength,
ResourceSourceIndex,
ResourceSource,
NameOpNode,
NewRdNode
);
}
/** Code generation for the "DWordMemory ()" ASL function.
The Resource Data effectively created is a DWord Address Space Resource
Data. Cf ACPI 6.4:
- s6.4.3.5.2 "DWord Address Space Descriptor".
- s19.6.35 "DWordMemory".
The created resource data node can be:
- appended to the list of resource data elements of the NameOpNode.
In such case NameOpNode must be defined by a the "Name ()" ASL statement
and initially contain a "ResourceTemplate ()".
- returned through the NewRdNode parameter.
See ACPI 6.4 spec, s19.6.35 for more.
@param [in] IsResourceConsumer ResourceUsage parameter.
@param [in] IsPosDecode Decode parameter
@param [in] IsMinFixed Minimum address is fixed.
@param [in] IsMaxFixed Maximum address is fixed.
@param [in] Cacheable Possible values are:
0-The memory is non-cacheable
1-The memory is cacheable
2-The memory is cacheable and supports
write combining
3-The memory is cacheable and prefetchable
@param [in] IsReadWrite ReadAndWrite parameter.
@param [in] AddressGranularity Address granularity.
@param [in] AddressMinimum Minimum address.
@param [in] AddressMaximum Maximum address.
@param [in] AddressTranslation Address translation.
@param [in] RangeLength Range length.
@param [in] ResourceSourceIndex Resource Source index.
Unused. Must be 0.
@param [in] ResourceSource Resource Source.
Unused. Must be NULL.
@param [in] MemoryRangeType Possible values are:
0-AddressRangeMemory
1-AddressRangeReserved
2-AddressRangeACPI
3-AddressRangeNVS
@param [in] IsTypeStatic TranslationType parameter.
@param [in] NameOpNode NameOp object node defining a named object.
If provided, append the new resource data
node to the list of resource data elements
of this node.
@param [out] NewRdNode If provided and success,
contain the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenRdDWordMemory (
IN BOOLEAN IsResourceConsumer,
IN BOOLEAN IsPosDecode,
IN BOOLEAN IsMinFixed,
IN BOOLEAN IsMaxFixed,
IN UINT8 Cacheable,
IN BOOLEAN IsReadWrite,
IN UINT32 AddressGranularity,
IN UINT32 AddressMinimum,
IN UINT32 AddressMaximum,
IN UINT32 AddressTranslation,
IN UINT32 RangeLength,
IN UINT8 ResourceSourceIndex,
IN CONST CHAR8 *ResourceSource,
IN UINT8 MemoryRangeType,
IN BOOLEAN IsTypeStatic,
IN AML_OBJECT_NODE_HANDLE NameOpNode, OPTIONAL
OUT AML_DATA_NODE_HANDLE *NewRdNode OPTIONAL
)
{
return AmlCodeGenRdDWordSpace (
ACPI_ADDRESS_SPACE_TYPE_MEM,
IsResourceConsumer,
IsPosDecode,
IsMinFixed,
IsMaxFixed,
MemoryRangeSpecificFlags (
Cacheable,
IsReadWrite,
MemoryRangeType,
IsTypeStatic
),
AddressGranularity,
AddressMinimum,
AddressMaximum,
AddressTranslation,
RangeLength,
ResourceSourceIndex,
ResourceSource,
NameOpNode,
NewRdNode
);
}
/** Code generation for the "Memory32Fixed ()" ASL macro.
The Resource Data effectively created is a 32-bit Memory Resource
Data. Cf ACPI 6.4:
- s19.6.83 "Memory Resource Descriptor Macro".
- s19.2.8 "Memory32FixedTerm".
See ACPI 6.4 spec, s19.2.8 for more.
@param [in] IsReadWrite ReadAndWrite parameter.
@param [in] Address AddressBase parameter.
@param [in] RangeLength Range length.
@param [in] NameOpNode NameOp object node defining a named object.
If provided, append the new resource data
node to the list of resource data elements
of this node.
@param [out] NewMemNode If provided and success,
contain the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenRdMemory32Fixed (
BOOLEAN IsReadWrite,
UINT32 Address,
UINT32 RangeLength,
AML_OBJECT_NODE_HANDLE NameOpNode,
AML_DATA_NODE_HANDLE *NewMemNode
)
{
EFI_STATUS Status;
AML_DATA_NODE *MemNode;
EFI_ACPI_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR RangeDesc;
RangeDesc.Header.Header.Byte = ACPI_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR;
RangeDesc.Header.Length = sizeof (EFI_ACPI_32_BIT_FIXED_MEMORY_RANGE_DESCRIPTOR) -
sizeof (ACPI_LARGE_RESOURCE_HEADER);
RangeDesc.Information = IsReadWrite ? BIT0 : 0;
RangeDesc.BaseAddress = Address;
RangeDesc.Length = RangeLength;
Status = AmlCreateDataNode (
EAmlNodeDataTypeResourceData,
(UINT8 *)&RangeDesc,
sizeof (RangeDesc),
&MemNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
return LinkRdNode (MemNode, NameOpNode, NewMemNode);
}
/** Code generation for the "WordSpace ()" ASL function.
The Resource Data effectively created is a Word Address Space Resource
Data. Cf ACPI 6.4:
- s6.4.3.5.3 "Word Address Space Descriptor".
- s19.6.151 "WordSpace".
The created resource data node can be:
- appended to the list of resource data elements of the NameOpNode.
In such case NameOpNode must be defined by a the "Name ()" ASL statement
and initially contain a "ResourceTemplate ()".
- returned through the NewRdNode parameter.
See ACPI 6.4 spec, s19.6.151 for more.
@param [in] ResourceType Resource type.
Possible values are:
0: Memory range
1: I/O range
2: Bus number range
3-191: Reserved
192-255: Hardware Vendor Defined
See ACPI 6.4 spec, s6.4.3.5.3 for more.
@param [in] IsResourceConsumer ResourceUsage parameter.
@param [in] IsPosDecode Decode parameter
@param [in] IsMinFixed Minimum address is fixed.
@param [in] IsMaxFixed Maximum address is fixed.
@param [in] TypeSpecificFlags Type specific flags.
See ACPI 6.4 spec, s6.4.3.5.5
"Resource Type Specific Flags".
@param [in] AddressGranularity Address granularity.
@param [in] AddressMinimum Minimum address.
@param [in] AddressMaximum Maximum address.
@param [in] AddressTranslation Address translation.
@param [in] RangeLength Range length.
@param [in] ResourceSourceIndex Resource Source index.
Unused. Must be 0.
@param [in] ResourceSource Resource Source.
Unused. Must be NULL.
@param [in] NameOpNode NameOp object node defining a named object.
If provided, append the new resource data
node to the list of resource data elements
of this node.
@param [out] NewRdNode If provided and success,
contain the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenRdWordSpace (
IN UINT8 ResourceType,
IN BOOLEAN IsResourceConsumer,
IN BOOLEAN IsPosDecode,
IN BOOLEAN IsMinFixed,
IN BOOLEAN IsMaxFixed,
IN UINT8 TypeSpecificFlags,
IN UINT16 AddressGranularity,
IN UINT16 AddressMinimum,
IN UINT16 AddressMaximum,
IN UINT16 AddressTranslation,
IN UINT16 RangeLength,
IN UINT8 ResourceSourceIndex,
IN CONST CHAR8 *ResourceSource,
IN AML_OBJECT_NODE_HANDLE NameOpNode, OPTIONAL
OUT AML_DATA_NODE_HANDLE *NewRdNode OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *RdNode;
EFI_ACPI_WORD_ADDRESS_SPACE_DESCRIPTOR Rdword;
// ResourceSource and ResourceSourceIndex are unused.
if ((TypeSpecificFlags == MAX_UINT8) ||
(ResourceSourceIndex != 0) ||
(ResourceSource != NULL) ||
((NameOpNode == NULL) && (NewRdNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Status = CheckAddressSpaceFields (
IsMinFixed,
IsMaxFixed,
AddressGranularity,
AddressMinimum,
AddressMaximum,
AddressTranslation,
RangeLength
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Header
Rdword.Header.Header.Bits.Name =
ACPI_LARGE_WORD_ADDRESS_SPACE_DESCRIPTOR_NAME;
Rdword.Header.Header.Bits.Type = ACPI_LARGE_ITEM_FLAG;
Rdword.Header.Length = sizeof (EFI_ACPI_WORD_ADDRESS_SPACE_DESCRIPTOR) -
sizeof (ACPI_LARGE_RESOURCE_HEADER);
// Body
Rdword.ResType = ResourceType;
Rdword.GenFlag = AddressSpaceGeneralFlags (
IsPosDecode,
IsMinFixed,
IsMaxFixed
);
Rdword.SpecificFlag = TypeSpecificFlags;
Rdword.AddrSpaceGranularity = AddressGranularity;
Rdword.AddrRangeMin = AddressMinimum;
Rdword.AddrRangeMax = AddressMaximum;
Rdword.AddrTranslationOffset = AddressTranslation;
Rdword.AddrLen = RangeLength;
Status = AmlCreateDataNode (
EAmlNodeDataTypeResourceData,
(UINT8 *)&Rdword,
sizeof (EFI_ACPI_WORD_ADDRESS_SPACE_DESCRIPTOR),
&RdNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
return LinkRdNode (RdNode, NameOpNode, NewRdNode);
}
/** Code generation for the "WordBusNumber ()" ASL function.
The Resource Data effectively created is a Word Address Space Resource
Data. Cf ACPI 6.4:
- s6.4.3.5.3 "Word Address Space Descriptor".
- s19.6.149 "WordBusNumber".
The created resource data node can be:
- appended to the list of resource data elements of the NameOpNode.
In such case NameOpNode must be defined by a the "Name ()" ASL statement
and initially contain a "ResourceTemplate ()".
- returned through the NewRdNode parameter.
See ACPI 6.4 spec, s19.6.149 for more.
@param [in] IsResourceConsumer ResourceUsage parameter.
@param [in] IsMinFixed Minimum address is fixed.
@param [in] IsMaxFixed Maximum address is fixed.
@param [in] IsPosDecode Decode parameter
@param [in] AddressGranularity Address granularity.
@param [in] AddressMinimum Minimum address.
@param [in] AddressMaximum Maximum address.
@param [in] AddressTranslation Address translation.
@param [in] RangeLength Range length.
@param [in] ResourceSourceIndex Resource Source index.
Unused. Must be 0.
@param [in] ResourceSource Resource Source.
Unused. Must be NULL.
@param [in] NameOpNode NameOp object node defining a named object.
If provided, append the new resource data
node to the list of resource data elements
of this node.
@param [out] NewRdNode If provided and success,
contain the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenRdWordBusNumber (
IN BOOLEAN IsResourceConsumer,
IN BOOLEAN IsMinFixed,
IN BOOLEAN IsMaxFixed,
IN BOOLEAN IsPosDecode,
IN UINT32 AddressGranularity,
IN UINT32 AddressMinimum,
IN UINT32 AddressMaximum,
IN UINT32 AddressTranslation,
IN UINT32 RangeLength,
IN UINT8 ResourceSourceIndex,
IN CONST CHAR8 *ResourceSource,
IN AML_OBJECT_NODE_HANDLE NameOpNode, OPTIONAL
OUT AML_DATA_NODE_HANDLE *NewRdNode OPTIONAL
)
{
// There is no Type Specific Flags for buses.
return AmlCodeGenRdWordSpace (
ACPI_ADDRESS_SPACE_TYPE_BUS,
IsResourceConsumer,
IsPosDecode,
IsMinFixed,
IsMaxFixed,
0,
AddressGranularity,
AddressMinimum,
AddressMaximum,
AddressTranslation,
RangeLength,
ResourceSourceIndex,
ResourceSource,
NameOpNode,
NewRdNode
);
}
/** Code generation for the "QWordSpace ()" ASL function.
The Resource Data effectively created is a QWord Address Space Resource
Data. Cf ACPI 6.4:
- s6.4.3.5.1 "QWord Address Space Descriptor".
- s19.6.111 "QWordSpace".
The created resource data node can be:
- appended to the list of resource data elements of the NameOpNode.
In such case NameOpNode must be defined by a the "Name ()" ASL statement
and initially contain a "ResourceTemplate ()".
- returned through the NewRdNode parameter.
See ACPI 6.4 spec, s19.6.111 for more.
@param [in] ResourceType Resource type.
Possible values are:
0: Memory range
1: I/O range
2: Bus number range
3-191: Reserved
192-255: Hardware Vendor Defined
See ACPI 6.4 spec, s6.4.3.5.1 for more.
@param [in] IsResourceConsumer ResourceUsage parameter.
@param [in] IsPosDecode Decode parameter
@param [in] IsMinFixed Minimum address is fixed.
@param [in] IsMaxFixed Maximum address is fixed.
@param [in] TypeSpecificFlags Type specific flags.
See ACPI 6.4 spec, s6.4.3.5.5
"Resource Type Specific Flags".
@param [in] AddressGranularity Address granularity.
@param [in] AddressMinimum Minimum address.
@param [in] AddressMaximum Maximum address.
@param [in] AddressTranslation Address translation.
@param [in] RangeLength Range length.
@param [in] ResourceSourceIndex Resource Source index.
Unused. Must be 0.
@param [in] ResourceSource Resource Source.
Unused. Must be NULL.
@param [in] NameOpNode NameOp object node defining a named object.
If provided, append the new resource data
node to the list of resource data elements
of this node.
@param [out] NewRdNode If provided and success,
contain the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenRdQWordSpace (
IN UINT8 ResourceType,
IN BOOLEAN IsResourceConsumer,
IN BOOLEAN IsPosDecode,
IN BOOLEAN IsMinFixed,
IN BOOLEAN IsMaxFixed,
IN UINT8 TypeSpecificFlags,
IN UINT64 AddressGranularity,
IN UINT64 AddressMinimum,
IN UINT64 AddressMaximum,
IN UINT64 AddressTranslation,
IN UINT64 RangeLength,
IN UINT8 ResourceSourceIndex,
IN CONST CHAR8 *ResourceSource,
IN AML_OBJECT_NODE_HANDLE NameOpNode, OPTIONAL
OUT AML_DATA_NODE_HANDLE *NewRdNode OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *RdNode;
EFI_ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR RdQword;
// ResourceSource and ResourceSourceIndex are unused.
if ((TypeSpecificFlags == MAX_UINT8) ||
(ResourceSourceIndex != 0) ||
(ResourceSource != NULL) ||
((NameOpNode == NULL) && (NewRdNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Status = CheckAddressSpaceFields (
IsMinFixed,
IsMaxFixed,
AddressGranularity,
AddressMinimum,
AddressMaximum,
AddressTranslation,
RangeLength
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Header
RdQword.Header.Header.Bits.Name =
ACPI_LARGE_QWORD_ADDRESS_SPACE_DESCRIPTOR_NAME;
RdQword.Header.Header.Bits.Type = ACPI_LARGE_ITEM_FLAG;
RdQword.Header.Length = sizeof (EFI_ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR) -
sizeof (ACPI_LARGE_RESOURCE_HEADER);
// Body
RdQword.ResType = ResourceType;
RdQword.GenFlag = AddressSpaceGeneralFlags (
IsPosDecode,
IsMinFixed,
IsMaxFixed
);
RdQword.SpecificFlag = TypeSpecificFlags;
RdQword.AddrSpaceGranularity = AddressGranularity;
RdQword.AddrRangeMin = AddressMinimum;
RdQword.AddrRangeMax = AddressMaximum;
RdQword.AddrTranslationOffset = AddressTranslation;
RdQword.AddrLen = RangeLength;
Status = AmlCreateDataNode (
EAmlNodeDataTypeResourceData,
(UINT8 *)&RdQword,
sizeof (EFI_ACPI_QWORD_ADDRESS_SPACE_DESCRIPTOR),
&RdNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
return LinkRdNode (RdNode, NameOpNode, NewRdNode);
}
/** Code generation for the "QWordMemory ()" ASL function.
The Resource Data effectively created is a QWord Address Space Resource
Data. Cf ACPI 6.4:
- s6.4.3.5.1 "QWord Address Space Descriptor".
- s19.6.110 "QWordMemory".
The created resource data node can be:
- appended to the list of resource data elements of the NameOpNode.
In such case NameOpNode must be defined by a the "Name ()" ASL statement
and initially contain a "ResourceTemplate ()".
- returned through the NewRdNode parameter.
See ACPI 6.4 spec, s19.6.110 for more.
@param [in] IsResourceConsumer ResourceUsage parameter.
@param [in] IsPosDecode Decode parameter.
@param [in] IsMinFixed Minimum address is fixed.
@param [in] IsMaxFixed Maximum address is fixed.
@param [in] Cacheable Possible values are:
0-The memory is non-cacheable
1-The memory is cacheable
2-The memory is cacheable and supports
write combining
3-The memory is cacheable and prefetchable
@param [in] IsReadWrite ReadAndWrite parameter.
@param [in] AddressGranularity Address granularity.
@param [in] AddressMinimum Minimum address.
@param [in] AddressMaximum Maximum address.
@param [in] AddressTranslation Address translation.
@param [in] RangeLength Range length.
@param [in] ResourceSourceIndex Resource Source index.
Unused. Must be 0.
@param [in] ResourceSource Resource Source.
Unused. Must be NULL.
@param [in] MemoryRangeType Possible values are:
0-AddressRangeMemory
1-AddressRangeReserved
2-AddressRangeACPI
3-AddressRangeNVS
@param [in] IsTypeStatic TranslationType parameter.
@param [in] NameOpNode NameOp object node defining a named object.
If provided, append the new resource data
node to the list of resource data elements
of this node.
@param [out] NewRdNode If provided and success,
contain the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenRdQWordMemory (
IN BOOLEAN IsResourceConsumer,
IN BOOLEAN IsPosDecode,
IN BOOLEAN IsMinFixed,
IN BOOLEAN IsMaxFixed,
IN UINT8 Cacheable,
IN BOOLEAN IsReadWrite,
IN UINT64 AddressGranularity,
IN UINT64 AddressMinimum,
IN UINT64 AddressMaximum,
IN UINT64 AddressTranslation,
IN UINT64 RangeLength,
IN UINT8 ResourceSourceIndex,
IN CONST CHAR8 *ResourceSource,
IN UINT8 MemoryRangeType,
IN BOOLEAN IsTypeStatic,
IN AML_OBJECT_NODE_HANDLE NameOpNode, OPTIONAL
OUT AML_DATA_NODE_HANDLE *NewRdNode OPTIONAL
)
{
return AmlCodeGenRdQWordSpace (
ACPI_ADDRESS_SPACE_TYPE_MEM,
IsResourceConsumer,
IsPosDecode,
IsMinFixed,
IsMaxFixed,
MemoryRangeSpecificFlags (
Cacheable,
IsReadWrite,
MemoryRangeType,
IsTypeStatic
),
AddressGranularity,
AddressMinimum,
AddressMaximum,
AddressTranslation,
RangeLength,
ResourceSourceIndex,
ResourceSource,
NameOpNode,
NewRdNode
);
}
/** Code generation for the "Interrupt ()" ASL function.
The Resource Data effectively created is an Extended Interrupt Resource
Data. Cf ACPI 6.4:
- s6.4.3.6 "Extended Interrupt Descriptor"
- s19.6.64 "Interrupt (Interrupt Resource Descriptor Macro)"
The created resource data node can be:
- appended to the list of resource data elements of the NameOpNode.
In such case NameOpNode must be defined by a the "Name ()" ASL statement
and initially contain a "ResourceTemplate ()".
- returned through the NewRdNode parameter.
@param [in] ResourceConsumer The device consumes the specified interrupt
or produces it for use by a child device.
@param [in] EdgeTriggered The interrupt is edge triggered or
level triggered.
@param [in] ActiveLow The interrupt is active-high or active-low.
@param [in] Shared The interrupt can be shared with other
devices or not (Exclusive).
@param [in] IrqList Interrupt list. Must be non-NULL.
@param [in] IrqCount Interrupt count. Must be non-zero.
@param [in] NameOpNode NameOp object node defining a named object.
If provided, append the new resource data node
to the list of resource data elements of this
node.
@param [out] NewRdNode If provided and success,
contain the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenRdInterrupt (
IN BOOLEAN ResourceConsumer,
IN BOOLEAN EdgeTriggered,
IN BOOLEAN ActiveLow,
IN BOOLEAN Shared,
IN UINT32 *IrqList,
IN UINT8 IrqCount,
IN AML_OBJECT_NODE_HANDLE NameOpNode OPTIONAL,
OUT AML_DATA_NODE_HANDLE *NewRdNode OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *RdNode;
EFI_ACPI_EXTENDED_INTERRUPT_DESCRIPTOR RdInterrupt;
UINT32 *FirstInterrupt;
if ((IrqList == NULL) ||
(IrqCount == 0) ||
((NameOpNode == NULL) && (NewRdNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
// Header
RdInterrupt.Header.Header.Bits.Name =
ACPI_LARGE_EXTENDED_IRQ_DESCRIPTOR_NAME;
RdInterrupt.Header.Header.Bits.Type = ACPI_LARGE_ITEM_FLAG;
RdInterrupt.Header.Length = sizeof (EFI_ACPI_EXTENDED_INTERRUPT_DESCRIPTOR) -
sizeof (ACPI_LARGE_RESOURCE_HEADER);
// Body
RdInterrupt.InterruptVectorFlags = (ResourceConsumer ? BIT0 : 0) |
(EdgeTriggered ? BIT1 : 0) |
(ActiveLow ? BIT2 : 0) |
(Shared ? BIT3 : 0);
RdInterrupt.InterruptTableLength = IrqCount;
// Get the address of the first interrupt field.
FirstInterrupt = RdInterrupt.InterruptNumber;
// Copy the list of interrupts.
CopyMem (FirstInterrupt, IrqList, (sizeof (UINT32) * IrqCount));
Status = AmlCreateDataNode (
EAmlNodeDataTypeResourceData,
(UINT8 *)&RdInterrupt,
sizeof (EFI_ACPI_EXTENDED_INTERRUPT_DESCRIPTOR),
&RdNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
return LinkRdNode (RdNode, NameOpNode, NewRdNode);
}
/** Code generation for the "Register ()" ASL function.
The Resource Data effectively created is a Generic Register Descriptor.
Data. Cf ACPI 6.4:
- s6.4.3.7 "Generic Register Descriptor".
- s19.6.114 "Register".
The created resource data node can be:
- appended to the list of resource data elements of the NameOpNode.
In such case NameOpNode must be defined by a the "Name ()" ASL statement
and initially contain a "ResourceTemplate ()".
- returned through the NewRdNode parameter.
@param [in] AddressSpace Address space where the register exists.
Can be one of I/O space, System Memory, etc.
@param [in] BitWidth Number of bits in the register.
@param [in] BitOffset Offset in bits from the start of the register
indicated by the Address.
@param [in] Address Register address.
@param [in] AccessSize Size of data values used when accessing the
address space. Can be one of:
0 - Undefined, legacy (EFI_ACPI_6_4_UNDEFINED)
1 - Byte access (EFI_ACPI_6_4_BYTE)
2 - Word access (EFI_ACPI_6_4_WORD)
3 - DWord access (EFI_ACPI_6_4_DWORD)
4 - QWord access (EFI_ACPI_6_4_QWORD)
@param [in] NameOpNode NameOp object node defining a named object.
If provided, append the new resource data node
to the list of resource data elements of this
node.
@param [out] NewRdNode If provided and success,
contain the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenRdRegister (
IN UINT8 AddressSpace,
IN UINT8 BitWidth,
IN UINT8 BitOffset,
IN UINT64 Address,
IN UINT8 AccessSize,
IN AML_OBJECT_NODE_HANDLE NameOpNode OPTIONAL,
OUT AML_DATA_NODE_HANDLE *NewRdNode OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *RdNode;
EFI_ACPI_GENERIC_REGISTER_DESCRIPTOR RdRegister;
// Cf. ACPI 6.4, s14.7 Referencing the PCC address space
// The AccessSize represents the Subspace Id for the PCC address space.
if (((AddressSpace == EFI_ACPI_6_4_PLATFORM_COMMUNICATION_CHANNEL) &&
(AccessSize > 256)) ||
((AddressSpace != EFI_ACPI_6_4_PLATFORM_COMMUNICATION_CHANNEL) &&
(AccessSize > EFI_ACPI_6_4_QWORD)) ||
((NameOpNode == NULL) && (NewRdNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
// Header
RdRegister.Header.Header.Bits.Name =
ACPI_LARGE_GENERIC_REGISTER_DESCRIPTOR_NAME;
RdRegister.Header.Header.Bits.Type = ACPI_LARGE_ITEM_FLAG;
RdRegister.Header.Length = sizeof (EFI_ACPI_GENERIC_REGISTER_DESCRIPTOR) -
sizeof (ACPI_LARGE_RESOURCE_HEADER);
// Body
RdRegister.AddressSpaceId = AddressSpace;
RdRegister.RegisterBitWidth = BitWidth;
RdRegister.RegisterBitOffset = BitOffset;
RdRegister.AddressSize = AccessSize;
RdRegister.RegisterAddress = Address;
Status = AmlCreateDataNode (
EAmlNodeDataTypeResourceData,
(UINT8 *)&RdRegister,
sizeof (EFI_ACPI_GENERIC_REGISTER_DESCRIPTOR),
&RdNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
return LinkRdNode (RdNode, NameOpNode, NewRdNode);
}
/** Code generation for the EndTag resource data.
The EndTag resource data is automatically generated by the ASL compiler
at the end of a list of resource data elements. Thus, it doesn't have
a corresponding ASL function.
This function allocates memory to create a data node. It is the caller's
responsibility to either:
- attach this node to an AML tree;
- delete this node.
ACPI 6.4, s6.4.2.9 "End Tag":
"This checksum is generated such that adding it to the sum of all the data
bytes will produce a zero sum."
"If the checksum field is zero, the resource data is treated as if the
checksum operation succeeded. Configuration proceeds normally."
To avoid re-computing checksums, if a new resource data elements is
added/removed/modified in a list of resource data elements, the AmlLib
resets the checksum to 0.
@param [in] CheckSum CheckSum to store in the EndTag.
To ignore/avoid computing the checksum,
give 0.
@param [in] ParentNode If not NULL, add the generated node
to the end of the variable list of
argument of the ParentNode.
The ParentNode must not initially contain
an EndTag resource data element.
@param [out] NewRdNode If success, contains the generated node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Could not allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenEndTag (
IN UINT8 CheckSum OPTIONAL,
IN AML_OBJECT_NODE *ParentNode OPTIONAL,
OUT AML_DATA_NODE **NewRdNode OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *RdNode;
EFI_ACPI_END_TAG_DESCRIPTOR EndTag;
ACPI_SMALL_RESOURCE_HEADER SmallResHdr;
if ((ParentNode == NULL) && (NewRdNode == NULL)) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
RdNode = NULL;
// Header
SmallResHdr.Bits.Length = sizeof (EFI_ACPI_END_TAG_DESCRIPTOR) -
sizeof (ACPI_SMALL_RESOURCE_HEADER);
SmallResHdr.Bits.Name = ACPI_SMALL_END_TAG_DESCRIPTOR_NAME;
SmallResHdr.Bits.Type = ACPI_SMALL_ITEM_FLAG;
// Body
EndTag.Desc = SmallResHdr.Byte;
EndTag.Checksum = CheckSum;
Status = AmlCreateDataNode (
EAmlNodeDataTypeResourceData,
(UINT8 *)&EndTag,
sizeof (EFI_ACPI_END_TAG_DESCRIPTOR),
&RdNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
if (NewRdNode != NULL) {
*NewRdNode = RdNode;
}
if (ParentNode != NULL) {
// Check the BufferOp doesn't contain any resource data yet.
// This is a hard check: do not allow to add an EndTag if the BufferNode
// already has resource data elements attached. Indeed, the EndTag should
// have already been added.
if (AmlGetNextVariableArgument ((AML_NODE_HEADER *)ParentNode, NULL) !=
NULL)
{
ASSERT (0);
Status = EFI_INVALID_PARAMETER;
goto error_handler;
}
// Add the EndTag RdNode. Indeed, the AmlAppendRdNode function
// is looking for an EndTag, which we are adding here.
Status = AmlVarListAddTail (
(AML_NODE_HEADER *)ParentNode,
(AML_NODE_HEADER *)RdNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
}
return Status;
error_handler:
if (RdNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)RdNode);
}
return Status;
}
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