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audk/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c

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/** @file
AML Code Generation.
Copyright (c) 2020 - 2022, Arm Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <AmlNodeDefines.h>
#include <AcpiTableGenerator.h>
#include <AmlCoreInterface.h>
#include <AmlCpcInfo.h>
#include <AmlEncoding/Aml.h>
#include <Api/AmlApiHelper.h>
#include <CodeGen/AmlResourceDataCodeGen.h>
#include <Tree/AmlNode.h>
#include <Tree/AmlTree.h>
#include <String/AmlString.h>
#include <Utils/AmlUtility.h>
/** Utility function to link a node when returning from a CodeGen function.
@param [in] Node Newly created node.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If not NULL:
- and Success, contains the created Node.
- and Error, reset to NULL.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
**/
STATIC
EFI_STATUS
EFIAPI
LinkNode (
IN AML_OBJECT_NODE *Node,
IN AML_NODE_HEADER *ParentNode,
OUT AML_OBJECT_NODE **NewObjectNode
)
{
EFI_STATUS Status;
if (NewObjectNode != NULL) {
*NewObjectNode = NULL;
}
// Add RdNode as the last element.
if (ParentNode != NULL) {
Status = AmlVarListAddTail (ParentNode, (AML_NODE_HEADER *)Node);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
}
if (NewObjectNode != NULL) {
*NewObjectNode = Node;
}
return EFI_SUCCESS;
}
/** AML code generation for DefinitionBlock.
Create a Root Node handle.
It is the caller's responsibility to free the allocated memory
with the AmlDeleteTree function.
AmlCodeGenDefinitionBlock (TableSignature, OemID, TableID, OEMRevision) is
equivalent to the following ASL code:
DefinitionBlock (AMLFileName, TableSignature, ComplianceRevision,
OemID, TableID, OEMRevision) {}
with the ComplianceRevision set to 2 and the AMLFileName is ignored.
@param[in] TableSignature 4-character ACPI signature.
Must be 'DSDT' or 'SSDT'.
@param[in] OemId 6-character string OEM identifier.
@param[in] OemTableId 8-character string OEM table identifier.
@param[in] OemRevision OEM revision number.
@param[out] NewRootNode Pointer to the root node representing a
Definition Block.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenDefinitionBlock (
IN CONST CHAR8 *TableSignature,
IN CONST CHAR8 *OemId,
IN CONST CHAR8 *OemTableId,
IN UINT32 OemRevision,
OUT AML_ROOT_NODE **NewRootNode
)
{
EFI_STATUS Status;
EFI_ACPI_DESCRIPTION_HEADER AcpiHeader;
if ((TableSignature == NULL) ||
(OemId == NULL) ||
(OemTableId == NULL) ||
(NewRootNode == NULL))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
CopyMem (&AcpiHeader.Signature, TableSignature, 4);
AcpiHeader.Length = sizeof (EFI_ACPI_DESCRIPTION_HEADER);
AcpiHeader.Revision = 2;
CopyMem (&AcpiHeader.OemId, OemId, 6);
CopyMem (&AcpiHeader.OemTableId, OemTableId, 8);
AcpiHeader.OemRevision = OemRevision;
AcpiHeader.CreatorId = TABLE_GENERATOR_CREATOR_ID_ARM;
AcpiHeader.CreatorRevision = CREATE_REVISION (1, 0);
Status = AmlCreateRootNode (&AcpiHeader, NewRootNode);
ASSERT_EFI_ERROR (Status);
return Status;
}
/** AML code generation for a String object node.
@param [in] String Pointer to a NULL terminated string.
@param [out] NewObjectNode If success, contains the created
String object node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenString (
IN CHAR8 *String,
OUT AML_OBJECT_NODE **NewObjectNode
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *ObjectNode;
AML_DATA_NODE *DataNode;
if ((String == NULL) ||
(NewObjectNode == NULL))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
DataNode = NULL;
Status = AmlCreateObjectNode (
AmlGetByteEncodingByOpCode (AML_STRING_PREFIX, 0),
0,
&ObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeString,
(UINT8 *)String,
(UINT32)AsciiStrLen (String) + 1,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
Status = AmlSetFixedArgument (
ObjectNode,
EAmlParseIndexTerm0,
(AML_NODE_HEADER *)DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
AmlDeleteTree ((AML_NODE_HEADER *)DataNode);
goto error_handler;
}
*NewObjectNode = ObjectNode;
return Status;
error_handler:
AmlDeleteTree ((AML_NODE_HEADER *)ObjectNode);
return Status;
}
/** AML code generation for an Integer object node.
@param [in] Integer Integer of the Integer object node.
@param [out] NewObjectNode If success, contains the created
Integer object node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenInteger (
IN UINT64 Integer,
OUT AML_OBJECT_NODE **NewObjectNode
)
{
EFI_STATUS Status;
INT8 ValueWidthDiff;
if (NewObjectNode == NULL) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
// Create an object node containing Zero.
Status = AmlCreateObjectNode (
AmlGetByteEncodingByOpCode (AML_ZERO_OP, 0),
0,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Update the object node with integer value.
Status = AmlNodeSetIntegerValue (*NewObjectNode, Integer, &ValueWidthDiff);
if (EFI_ERROR (Status)) {
ASSERT (0);
AmlDeleteTree ((AML_NODE_HEADER *)*NewObjectNode);
}
return Status;
}
/** AML code generation for a Package object node.
The package generated is empty. New elements can be added via its
list of variable arguments.
@param [out] NewObjectNode If success, contains the created
Package object node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenPackage (
OUT AML_OBJECT_NODE **NewObjectNode
)
{
EFI_STATUS Status;
AML_DATA_NODE *DataNode;
UINT8 NodeCount;
if (NewObjectNode == NULL) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
NodeCount = 0;
// Create an object node.
// PkgLen is 2:
// - one byte to store the PkgLength
// - one byte for the NumElements.
// Cf ACPI6.3, s20.2.5 "Term Objects Encoding"
// DefPackage := PackageOp PkgLength NumElements PackageElementList
// NumElements := ByteData
Status = AmlCreateObjectNode (
AmlGetByteEncodingByOpCode (AML_PACKAGE_OP, 0),
2,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// NumElements is a ByteData.
Status = AmlCreateDataNode (
EAmlNodeDataTypeUInt,
&NodeCount,
sizeof (NodeCount),
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
Status = AmlSetFixedArgument (
*NewObjectNode,
EAmlParseIndexTerm0,
(AML_NODE_HEADER *)DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
return Status;
error_handler:
AmlDeleteTree ((AML_NODE_HEADER *)*NewObjectNode);
if (DataNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)DataNode);
}
return Status;
}
/** AML code generation for a Buffer object node.
To create a Buffer object node with an empty buffer,
call the function with (Buffer=NULL, BufferSize=0).
@param [in] Buffer Buffer to set for the created Buffer
object node. The Buffer's content is copied.
NULL if there is no buffer to set for
the Buffer node.
@param [in] BufferSize Size of the Buffer.
0 if there is no buffer to set for
the Buffer node.
@param [out] NewObjectNode If success, contains the created
Buffer object node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenBuffer (
IN CONST UINT8 *Buffer OPTIONAL,
IN UINT32 BufferSize OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *BufferNode;
AML_OBJECT_NODE *BufferSizeNode;
UINT32 BufferSizeNodeSize;
AML_DATA_NODE *DataNode;
UINT32 PkgLen;
// Buffer and BufferSize must be either both set, or both clear.
if ((NewObjectNode == NULL) ||
((Buffer == NULL) != (BufferSize == 0)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
BufferNode = NULL;
DataNode = NULL;
// Cf ACPI 6.3 specification, s20.2.5.4 "Type 2 Opcodes Encoding"
// DefBuffer := BufferOp PkgLength BufferSize ByteList
// BufferOp := 0x11
// BufferSize := TermArg => Integer
Status = AmlCodeGenInteger (BufferSize, &BufferSizeNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Get the number of bytes required to encode the BufferSizeNode.
Status = AmlComputeSize (
(AML_NODE_HEADER *)BufferSizeNode,
&BufferSizeNodeSize
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
// Compute the size to write in the PkgLen.
Status = AmlComputePkgLength (BufferSizeNodeSize + BufferSize, &PkgLen);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
// Create an object node for the buffer.
Status = AmlCreateObjectNode (
AmlGetByteEncodingByOpCode (AML_BUFFER_OP, 0),
PkgLen,
&BufferNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
// Set the BufferSizeNode as a fixed argument of the BufferNode.
Status = AmlSetFixedArgument (
BufferNode,
EAmlParseIndexTerm0,
(AML_NODE_HEADER *)BufferSizeNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
// BufferSizeNode is now attached.
BufferSizeNode = NULL;
// If there is a buffer, create a DataNode and attach it to the BufferNode.
if (Buffer != NULL) {
Status = AmlCreateDataNode (
EAmlNodeDataTypeRaw,
Buffer,
BufferSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HEADER *)BufferNode,
(AML_NODE_HEADER *)DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
}
*NewObjectNode = BufferNode;
return Status;
error_handler:
if (BufferSizeNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)BufferSizeNode);
}
if (BufferNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)BufferNode);
}
if (DataNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)DataNode);
}
return Status;
}
/** AML code generation for a ResourceTemplate.
"ResourceTemplate" is a macro defined in ACPI 6.3, s19.3.3
"ASL Resource Templates". It allows to store resource data elements.
In AML, a ResourceTemplate is implemented as a Buffer storing resource
data elements. An EndTag resource data descriptor must be at the end
of the list of resource data elements.
This function generates a Buffer node with an EndTag resource data
descriptor. It can be seen as an empty list of resource data elements.
@param [out] NewObjectNode If success, contains the created
ResourceTemplate object node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenResourceTemplate (
OUT AML_OBJECT_NODE **NewObjectNode
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *BufferNode;
if (NewObjectNode == NULL) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
// Create a BufferNode with an empty buffer.
Status = AmlCodeGenBuffer (NULL, 0, &BufferNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Create an EndTag resource data element and attach it to the Buffer.
Status = AmlCodeGenEndTag (0, BufferNode, NULL);
if (EFI_ERROR (Status)) {
ASSERT (0);
AmlDeleteTree ((AML_NODE_HEADER *)BufferNode);
return Status;
}
*NewObjectNode = BufferNode;
return Status;
}
/** AML code generation for a Name object node.
@param [in] NameString The new variable name.
Must be a NULL-terminated ASL NameString
e.g.: "DEV0", "DV15.DEV0", etc.
This input string is copied.
@param [in] Object Object associated to the NameString.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenName (
IN CONST CHAR8 *NameString,
IN AML_OBJECT_NODE *Object,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *ObjectNode;
AML_DATA_NODE *DataNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
if ((NameString == NULL) ||
(Object == NULL) ||
((ParentNode == NULL) && (NewObjectNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
ObjectNode = NULL;
DataNode = NULL;
AmlNameString = NULL;
Status = ConvertAslNameToAmlName (NameString, &AmlNameString);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlGetNameStringSize (AmlNameString, &AmlNameStringSize);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler1;
}
Status = AmlCreateObjectNode (
AmlGetByteEncodingByOpCode (AML_NAME_OP, 0),
0,
&ObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler1;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
Status = AmlSetFixedArgument (
ObjectNode,
EAmlParseIndexTerm0,
(AML_NODE_HEADER *)DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
AmlDeleteTree ((AML_NODE_HEADER *)DataNode);
goto error_handler2;
}
Status = AmlSetFixedArgument (
ObjectNode,
EAmlParseIndexTerm1,
(AML_NODE_HEADER *)Object
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
Status = LinkNode (
ObjectNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
// Free AmlNameString before returning as it is copied
// in the call to AmlCreateDataNode().
goto error_handler1;
error_handler2:
if (ObjectNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)ObjectNode);
}
error_handler1:
if (AmlNameString != NULL) {
FreePool (AmlNameString);
}
return Status;
}
/** AML code generation for a Name object node, containing a String.
AmlCodeGenNameString ("_HID", "HID0000", ParentNode, NewObjectNode) is
equivalent of the following ASL code:
Name(_HID, "HID0000")
@param [in] NameString The new variable name.
Must be a NULL-terminated ASL NameString
e.g.: "DEV0", "DV15.DEV0", etc.
The input string is copied.
@param [in] String NULL terminated String to associate to the
NameString.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenNameString (
IN CONST CHAR8 *NameString,
IN CHAR8 *String,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *ObjectNode;
if ((NameString == NULL) ||
(String == NULL) ||
((ParentNode == NULL) && (NewObjectNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Status = AmlCodeGenString (String, &ObjectNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlCodeGenName (
NameString,
ObjectNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
AmlDeleteTree ((AML_NODE_HEADER *)ObjectNode);
}
return Status;
}
/** AML code generation for a Name object node, containing an Integer.
AmlCodeGenNameInteger ("_UID", 1, ParentNode, NewObjectNode) is
equivalent of the following ASL code:
Name(_UID, One)
@param [in] NameString The new variable name.
Must be a NULL-terminated ASL NameString
e.g.: "DEV0", "DV15.DEV0", etc.
The input string is copied.
@param [in] Integer Integer to associate to the NameString.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenNameInteger (
IN CONST CHAR8 *NameString,
IN UINT64 Integer,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *ObjectNode;
if ((NameString == NULL) ||
((ParentNode == NULL) && (NewObjectNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Status = AmlCodeGenInteger (Integer, &ObjectNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlCodeGenName (
NameString,
ObjectNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
AmlDeleteTree ((AML_NODE_HEADER *)ObjectNode);
}
return Status;
}
/** AML code generation for a Name object node, containing a Package.
AmlCodeGenNamePackage ("PKG0", ParentNode, NewObjectNode) is
equivalent of the following ASL code:
Name(PKG0, Package () {})
@param [in] NameString The new variable name.
Must be a NULL-terminated ASL NameString
e.g.: "DEV0", "DV15.DEV0", etc.
The input string is copied.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenNamePackage (
IN CONST CHAR8 *NameString,
IN AML_NODE_HEADER *ParentNode, OPTIONAL
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *PackageNode;
if ((NameString == NULL) ||
((ParentNode == NULL) && (NewObjectNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Status = AmlCodeGenPackage (&PackageNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlCodeGenName (
NameString,
PackageNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
AmlDeleteTree ((AML_NODE_HEADER *)PackageNode);
}
return Status;
}
/** AML code generation for a Name object node, containing a ResourceTemplate.
AmlCodeGenNameResourceTemplate ("PRS0", ParentNode, NewObjectNode) is
equivalent of the following ASL code:
Name(PRS0, ResourceTemplate () {})
@param [in] NameString The new variable name.
Must be a NULL-terminated ASL NameString
e.g.: "DEV0", "DV15.DEV0", etc.
The input string is copied.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenNameResourceTemplate (
IN CONST CHAR8 *NameString,
IN AML_NODE_HEADER *ParentNode, OPTIONAL
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *ResourceTemplateNode;
if ((NameString == NULL) ||
((ParentNode == NULL) && (NewObjectNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Status = AmlCodeGenResourceTemplate (&ResourceTemplateNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlCodeGenName (
NameString,
ResourceTemplateNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
AmlDeleteTree ((AML_NODE_HEADER *)ResourceTemplateNode);
}
return Status;
}
/** Add a _PRT entry.
AmlCodeGenPrtEntry (0x0FFFF, 0, "LNKA", 0, PrtNameNode) is
equivalent of the following ASL code:
Package (4) {
0x0FFFF, // Address: Device address (([Device Id] << 16) | 0xFFFF).
0, // Pin: PCI pin number of the device (0-INTA, ...).
LNKA // Source: Name of the device that allocates the interrupt
// to which the above pin is connected.
0 // Source Index: Source is assumed to only describe one
// interrupt, so let it to index 0.
}
The 2 models described in ACPI 6.4, s6.2.13 "_PRT (PCI Routing Table)" can
be generated by this function. The example above matches the first model.
The package is added at the tail of the list of the input _PRT node
name:
Name (_PRT, Package () {
[Pre-existing _PRT entries],
[Newly created _PRT entry]
})
Cf. ACPI 6.4 specification:
- s6.2.13 "_PRT (PCI Routing Table)"
- s6.1.1 "_ADR (Address)"
@param [in] Address Address. Cf ACPI 6.4 specification, Table 6.2:
"ADR Object Address Encodings":
High word-Device #, Low word-Function #. (for
example, device 3, function 2 is 0x00030002).
To refer to all the functions on a device #,
use a function number of FFFF).
@param [in] Pin PCI pin number of the device (0-INTA ... 3-INTD).
Must be between 0-3.
@param [in] LinkName Link Name, i.e. device in the AML NameSpace
describing the interrupt used. The input string
is copied.
If NULL, generate 0 in the 'Source' field (cf.
second model, using GSIV).
@param [in] SourceIndex Source index or GSIV.
@param [in] PrtNameNode Prt Named node to add the object to ....
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlAddPrtEntry (
IN UINT32 Address,
IN UINT8 Pin,
IN CONST CHAR8 *LinkName,
IN UINT32 SourceIndex,
IN AML_OBJECT_NODE_HANDLE PrtNameNode
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *PrtEntryList;
AML_OBJECT_NODE *PackageNode;
AML_OBJECT_NODE *NewElementNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
AML_DATA_NODE *DataNode;
if ((Pin > 3) ||
(PrtNameNode == NULL) ||
(AmlGetNodeType ((AML_NODE_HANDLE)PrtNameNode) != EAmlNodeObject) ||
(!AmlNodeHasOpCode (PrtNameNode, AML_NAME_OP, 0)) ||
!AmlNameOpCompareName (PrtNameNode, "_PRT"))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
NewElementNode = NULL;
AmlNameString = NULL;
DataNode = NULL;
// Get the Package object node of the _PRT node,
// which is the 2nd fixed argument (i.e. index 1).
PrtEntryList = (AML_OBJECT_NODE_HANDLE)AmlGetFixedArgument (
PrtNameNode,
EAmlParseIndexTerm1
);
if ((PrtEntryList == NULL) ||
(AmlGetNodeType ((AML_NODE_HANDLE)PrtEntryList) != EAmlNodeObject) ||
(!AmlNodeHasOpCode (PrtEntryList, AML_PACKAGE_OP, 0)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
// The new _PRT entry.
Status = AmlCodeGenPackage (&PackageNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlCodeGenInteger (Address, &NewElementNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)NewElementNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
NewElementNode = NULL;
Status = AmlCodeGenInteger (Pin, &NewElementNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)NewElementNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
NewElementNode = NULL;
if (LinkName != NULL) {
Status = ConvertAslNameToAmlName (LinkName, &AmlNameString);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlGetNameStringSize (AmlNameString, &AmlNameStringSize);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
// AmlNameString will be freed be fore returning.
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)DataNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
DataNode = NULL;
} else {
Status = AmlCodeGenInteger (0, &NewElementNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)NewElementNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
}
Status = AmlCodeGenInteger (SourceIndex, &NewElementNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)NewElementNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
// Append to the list of _PRT entries.
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PrtEntryList,
(AML_NODE_HANDLE)PackageNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
// Free AmlNameString before returning as it is copied
// in the call to AmlCreateDataNode().
goto exit_handler;
error_handler:
AmlDeleteTree ((AML_NODE_HANDLE)PackageNode);
if (NewElementNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)NewElementNode);
}
if (DataNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)DataNode);
}
exit_handler:
if (AmlNameString != NULL) {
FreePool (AmlNameString);
}
return Status;
}
/** AML code generation for a Device object node.
AmlCodeGenDevice ("COM0", ParentNode, NewObjectNode) is
equivalent of the following ASL code:
Device(COM0) {}
@param [in] NameString The new Device's name.
Must be a NULL-terminated ASL NameString
e.g.: "DEV0", "DV15.DEV0", etc.
The input string is copied.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenDevice (
IN CONST CHAR8 *NameString,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *ObjectNode;
AML_DATA_NODE *DataNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
if ((NameString == NULL) ||
((ParentNode == NULL) && (NewObjectNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
ObjectNode = NULL;
DataNode = NULL;
AmlNameString = NULL;
Status = ConvertAslNameToAmlName (NameString, &AmlNameString);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlGetNameStringSize (AmlNameString, &AmlNameStringSize);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler1;
}
Status = AmlCreateObjectNode (
AmlGetByteEncodingByOpCode (AML_EXT_OP, AML_EXT_DEVICE_OP),
AmlNameStringSize + AmlComputePkgLengthWidth (AmlNameStringSize),
&ObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler1;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
Status = AmlSetFixedArgument (
ObjectNode,
EAmlParseIndexTerm0,
(AML_NODE_HEADER *)DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
AmlDeleteTree ((AML_NODE_HEADER *)DataNode);
goto error_handler2;
}
Status = LinkNode (
ObjectNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
// Free AmlNameString before returning as it is copied
// in the call to AmlCreateDataNode().
goto error_handler1;
error_handler2:
if (ObjectNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)ObjectNode);
}
error_handler1:
if (AmlNameString != NULL) {
FreePool (AmlNameString);
}
return Status;
}
/** AML code generation for a Scope object node.
AmlCodeGenScope ("_SB", ParentNode, NewObjectNode) is
equivalent of the following ASL code:
Scope(_SB) {}
@param [in] NameString The new Scope's name.
Must be a NULL-terminated ASL NameString
e.g.: "DEV0", "DV15.DEV0", etc.
The input string is copied.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenScope (
IN CONST CHAR8 *NameString,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *ObjectNode;
AML_DATA_NODE *DataNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
if ((NameString == NULL) ||
((ParentNode == NULL) && (NewObjectNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
ObjectNode = NULL;
DataNode = NULL;
AmlNameString = NULL;
Status = ConvertAslNameToAmlName (NameString, &AmlNameString);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlGetNameStringSize (AmlNameString, &AmlNameStringSize);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler1;
}
Status = AmlCreateObjectNode (
AmlGetByteEncodingByOpCode (AML_SCOPE_OP, 0),
AmlNameStringSize + AmlComputePkgLengthWidth (AmlNameStringSize),
&ObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler1;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
Status = AmlSetFixedArgument (
ObjectNode,
EAmlParseIndexTerm0,
(AML_NODE_HEADER *)DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
AmlDeleteTree ((AML_NODE_HEADER *)DataNode);
goto error_handler2;
}
Status = LinkNode (
ObjectNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
// Free AmlNameString before returning as it is copied
// in the call to AmlCreateDataNode().
goto error_handler1;
error_handler2:
if (ObjectNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)ObjectNode);
}
error_handler1:
if (AmlNameString != NULL) {
FreePool (AmlNameString);
}
return Status;
}
/** AML code generation for a Method object node.
AmlCodeGenMethod ("MET0", 1, TRUE, 3, ParentNode, NewObjectNode) is
equivalent of the following ASL code:
Method(MET0, 1, Serialized, 3) {}
ACPI 6.4, s20.2.5.2 "Named Objects Encoding":
DefMethod := MethodOp PkgLength NameString MethodFlags TermList
MethodOp := 0x14
The ASL parameters "ReturnType" and "ParameterTypes" are not asked
in this function. They are optional parameters in ASL.
@param [in] NameString The new Method's name.
Must be a NULL-terminated ASL NameString
e.g.: "MET0", "_SB.MET0", etc.
The input string is copied.
@param [in] NumArgs Number of arguments.
Must be 0 <= NumArgs <= 6.
@param [in] IsSerialized TRUE is equivalent to Serialized.
FALSE is equivalent to NotSerialized.
Default is NotSerialized in ASL spec.
@param [in] SyncLevel Synchronization level for the method.
Must be 0 <= SyncLevel <= 15.
Default is 0 in ASL.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenMethod (
IN CONST CHAR8 *NameString,
IN UINT8 NumArgs,
IN BOOLEAN IsSerialized,
IN UINT8 SyncLevel,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
UINT32 PkgLen;
UINT8 Flags;
AML_OBJECT_NODE *ObjectNode;
AML_DATA_NODE *DataNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
if ((NameString == NULL) ||
(NumArgs > 6) ||
(SyncLevel > 15) ||
((ParentNode == NULL) && (NewObjectNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
ObjectNode = NULL;
DataNode = NULL;
// ACPI 6.4, s20.2.5.2 "Named Objects Encoding":
// DefMethod := MethodOp PkgLength NameString MethodFlags TermList
// MethodOp := 0x14
// So:
// 1- Create the NameString
// 2- Compute the size to write in the PkgLen
// 3- Create nodes for the NameString and Method object node
// 4- Set the NameString DataNode as a fixed argument
// 5- Create and link the MethodFlags node
// 1- Create the NameString
Status = ConvertAslNameToAmlName (NameString, &AmlNameString);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlGetNameStringSize (AmlNameString, &AmlNameStringSize);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler1;
}
// 2- Compute the size to write in the PkgLen
// Add 1 byte (ByteData) for MethodFlags.
Status = AmlComputePkgLength (AmlNameStringSize + 1, &PkgLen);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler1;
}
// 3- Create nodes for the NameString and Method object node
Status = AmlCreateObjectNode (
AmlGetByteEncodingByOpCode (AML_METHOD_OP, 0),
PkgLen,
&ObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler1;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
// 4- Set the NameString DataNode as a fixed argument
Status = AmlSetFixedArgument (
ObjectNode,
EAmlParseIndexTerm0,
(AML_NODE_HEADER *)DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
DataNode = NULL;
// 5- Create and link the MethodFlags node
Flags = NumArgs |
(IsSerialized ? BIT3 : 0) |
(SyncLevel << 4);
Status = AmlCreateDataNode (EAmlNodeDataTypeUInt, &Flags, 1, &DataNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
Status = AmlSetFixedArgument (
ObjectNode,
EAmlParseIndexTerm1,
(AML_NODE_HEADER *)DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
// Data node is attached so set the pointer to
// NULL to ensure correct error handling.
DataNode = NULL;
Status = LinkNode (
ObjectNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler2;
}
// Free AmlNameString before returning as it is copied
// in the call to AmlCreateDataNode().
goto error_handler1;
error_handler2:
if (ObjectNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)ObjectNode);
}
if (DataNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)DataNode);
}
error_handler1:
if (AmlNameString != NULL) {
FreePool (AmlNameString);
}
return Status;
}
/** AML code generation for a Return object node.
AmlCodeGenReturn (ReturnNode, ParentNode, NewObjectNode) is
equivalent of the following ASL code:
Return([Content of the ReturnNode])
The ACPI 6.3 specification, s20.2.5.3 "Type 1 Opcodes Encoding" states:
DefReturn := ReturnOp ArgObject
ReturnOp := 0xA4
ArgObject := TermArg => DataRefObject
Thus, the ReturnNode must be evaluated as a DataRefObject. It can
be a NameString referencing an object. As this CodeGen Api doesn't
do semantic checking, it is strongly advised to check the AML bytecode
generated by this function against an ASL compiler.
The ReturnNode must be generated inside a Method body scope.
@param [in] ReturnNode The object returned by the Return ASL statement.
This node is deleted if an error occurs.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
Must be a MethodOp node.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenReturn (
IN AML_NODE_HEADER *ReturnNode,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *ObjectNode;
if ((ReturnNode == NULL) ||
((ParentNode == NULL) && (NewObjectNode == NULL)) ||
((ParentNode != NULL) &&
!AmlNodeCompareOpCode (
(AML_OBJECT_NODE *)ParentNode,
AML_METHOD_OP,
0
)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
Status = AmlCreateObjectNode (
AmlGetByteEncodingByOpCode (AML_RETURN_OP, 0),
0,
&ObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
Status = AmlSetFixedArgument (
ObjectNode,
EAmlParseIndexTerm0,
ReturnNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
ReturnNode = NULL;
Status = LinkNode (
ObjectNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
return Status;
error_handler:
if (ReturnNode != NULL) {
AmlDeleteTree (ReturnNode);
}
if (ObjectNode != NULL) {
AmlDeleteTree ((AML_NODE_HEADER *)ObjectNode);
}
return Status;
}
/** AML code generation for a Return object node,
returning the object as an input NameString.
AmlCodeGenReturn ("NAM1", ParentNode, NewObjectNode) is
equivalent of the following ASL code:
Return(NAM1)
The ACPI 6.3 specification, s20.2.5.3 "Type 1 Opcodes Encoding" states:
DefReturn := ReturnOp ArgObject
ReturnOp := 0xA4
ArgObject := TermArg => DataRefObject
Thus, the ReturnNode must be evaluated as a DataRefObject. It can
be a NameString referencing an object. As this CodeGen Api doesn't
do semantic checking, it is strongly advised to check the AML bytecode
generated by this function against an ASL compiler.
The ReturnNode must be generated inside a Method body scope.
@param [in] NameString The object referenced by this NameString
is returned by the Return ASL statement.
Must be a NULL-terminated ASL NameString
e.g.: "NAM1", "_SB.NAM1", etc.
The input string is copied.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
Must be a MethodOp node.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenReturnNameString (
IN CONST CHAR8 *NameString,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *DataNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
DataNode = NULL;
Status = ConvertAslNameToAmlName (NameString, &AmlNameString);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlGetNameStringSize (AmlNameString, &AmlNameStringSize);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler;
}
// AmlCodeGenReturn() deletes DataNode if error.
Status = AmlCodeGenReturn (
(AML_NODE_HEADER *)DataNode,
ParentNode,
NewObjectNode
);
ASSERT_EFI_ERROR (Status);
exit_handler:
if (AmlNameString != NULL) {
FreePool (AmlNameString);
}
return Status;
}
/** AML code generation for a Return object node,
returning an Integer.
AmlCodeGenReturn (0), ParentNode, NewObjectNode) is
equivalent of the following ASL code:
Return (0)
The ACPI 6.3 specification, 20.2.8 "Statement Opcodes Encoding" states:
DefReturn := ReturnOp ArgObject
ReturnOp := 0xA4
ArgObject := TermArg => DataRefObject
Thus, the ReturnNode must be evaluated as a DataRefObject.
The ReturnNode must be generated inside a Method body scope.
@param [in] Integer The integer is returned by the Return
ASL statement.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
Must be a MethodOp node.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenReturnInteger (
IN UINT64 Integer,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *IntNode;
IntNode = NULL;
Status = AmlCodeGenInteger (Integer, &IntNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// AmlCodeGenReturn() deletes DataNode if error.
Status = AmlCodeGenReturn (
(AML_NODE_HEADER *)IntNode,
ParentNode,
NewObjectNode
);
ASSERT_EFI_ERROR (Status);
return Status;
}
/** AML code generation for a method returning a NameString.
AmlCodeGenMethodRetNameString (
"MET0", "_CRS", 1, TRUE, 3, ParentNode, NewObjectNode
);
is equivalent of the following ASL code:
Method(MET0, 1, Serialized, 3) {
Return (_CRS)
}
The ASL parameters "ReturnType" and "ParameterTypes" are not asked
in this function. They are optional parameters in ASL.
@param [in] MethodNameString The new Method's name.
Must be a NULL-terminated ASL NameString
e.g.: "MET0", "_SB.MET0", etc.
The input string is copied.
@param [in] ReturnedNameString The name of the object returned by the
method. Optional parameter, can be:
- NULL (ignored).
- A NULL-terminated ASL NameString.
e.g.: "MET0", "_SB.MET0", etc.
The input string is copied.
@param [in] NumArgs Number of arguments.
Must be 0 <= NumArgs <= 6.
@param [in] IsSerialized TRUE is equivalent to Serialized.
FALSE is equivalent to NotSerialized.
Default is NotSerialized in ASL spec.
@param [in] SyncLevel Synchronization level for the method.
Must be 0 <= SyncLevel <= 15.
Default is 0 in ASL.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenMethodRetNameString (
IN CONST CHAR8 *MethodNameString,
IN CONST CHAR8 *ReturnedNameString OPTIONAL,
IN UINT8 NumArgs,
IN BOOLEAN IsSerialized,
IN UINT8 SyncLevel,
IN AML_NODE_HANDLE ParentNode OPTIONAL,
OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE_HANDLE MethodNode;
if ((MethodNameString == NULL) ||
((ParentNode == NULL) && (NewObjectNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
// Create a Method named MethodNameString.
Status = AmlCodeGenMethod (
MethodNameString,
NumArgs,
IsSerialized,
SyncLevel,
NULL,
&MethodNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Return ReturnedNameString if provided.
if (ReturnedNameString != NULL) {
Status = AmlCodeGenReturnNameString (
ReturnedNameString,
(AML_NODE_HANDLE)MethodNode,
NULL
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
}
Status = LinkNode (
MethodNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
return Status;
error_handler:
if (MethodNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)MethodNode);
}
return Status;
}
/** AML code generation for a method returning an Integer.
AmlCodeGenMethodRetInteger (
"_CBA", 0, 1, TRUE, 3, ParentNode, NewObjectNode
);
is equivalent of the following ASL code:
Method(_CBA, 1, Serialized, 3) {
Return (0)
}
The ASL parameters "ReturnType" and "ParameterTypes" are not asked
in this function. They are optional parameters in ASL.
@param [in] MethodNameString The new Method's name.
Must be a NULL-terminated ASL NameString
e.g.: "MET0", "_SB.MET0", etc.
The input string is copied.
@param [in] ReturnedInteger The value of the integer returned by the
method.
@param [in] NumArgs Number of arguments.
Must be 0 <= NumArgs <= 6.
@param [in] IsSerialized TRUE is equivalent to Serialized.
FALSE is equivalent to NotSerialized.
Default is NotSerialized in ASL spec.
@param [in] SyncLevel Synchronization level for the method.
Must be 0 <= SyncLevel <= 15.
Default is 0 in ASL.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewObjectNode If success, contains the created node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCodeGenMethodRetInteger (
IN CONST CHAR8 *MethodNameString,
IN UINT64 ReturnedInteger,
IN UINT8 NumArgs,
IN BOOLEAN IsSerialized,
IN UINT8 SyncLevel,
IN AML_NODE_HANDLE ParentNode OPTIONAL,
OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE_HANDLE MethodNode;
if ((MethodNameString == NULL) ||
((ParentNode == NULL) && (NewObjectNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
// Create a Method named MethodNameString.
Status = AmlCodeGenMethod (
MethodNameString,
NumArgs,
IsSerialized,
SyncLevel,
NULL,
&MethodNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlCodeGenReturnInteger (
ReturnedInteger,
(AML_NODE_HANDLE)MethodNode,
NULL
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
Status = LinkNode (
MethodNode,
ParentNode,
NewObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
return Status;
error_handler:
if (MethodNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)MethodNode);
}
return Status;
}
/** Create a _LPI name.
AmlCreateLpiNode ("_LPI", 0, 1, ParentNode, &LpiNode) is
equivalent of the following ASL code:
Name (_LPI, Package (
0, // Revision
1, // LevelId
0 // Count
))
This function doesn't define any LPI state. As shown above, the count
of _LPI state is set to 0.
The AmlAddLpiState () function allows to add LPI states.
Cf ACPI 6.3 specification, s8.4.4 "Lower Power Idle States".
@param [in] LpiNameString The new LPI 's object name.
Must be a NULL-terminated ASL NameString
e.g.: "_LPI", "DEV0.PLPI", etc.
The input string is copied.
@param [in] Revision Revision number of the _LPI states.
@param [in] LevelId A platform defined number that identifies the
level of hierarchy of the processor node to
which the LPI states apply.
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewLpiNode If success, contains the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCreateLpiNode (
IN CONST CHAR8 *LpiNameString,
IN UINT16 Revision,
IN UINT64 LevelId,
IN AML_NODE_HANDLE ParentNode OPTIONAL,
OUT AML_OBJECT_NODE_HANDLE *NewLpiNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE_HANDLE PackageNode;
AML_OBJECT_NODE_HANDLE IntegerNode;
if ((LpiNameString == NULL) ||
((ParentNode == NULL) && (NewLpiNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
IntegerNode = NULL;
Status = AmlCodeGenPackage (&PackageNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// Create and attach Revision
Status = AmlCodeGenInteger (Revision, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
IntegerNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)IntegerNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
IntegerNode = NULL;
// Create and attach LevelId
Status = AmlCodeGenInteger (LevelId, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
IntegerNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)IntegerNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
IntegerNode = NULL;
// Create and attach Count. No LPI state is added, so 0.
Status = AmlCodeGenInteger (0, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
IntegerNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)IntegerNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
IntegerNode = NULL;
Status = AmlCodeGenName (LpiNameString, PackageNode, ParentNode, NewLpiNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
return Status;
error_handler:
AmlDeleteTree ((AML_NODE_HANDLE)PackageNode);
if (IntegerNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)IntegerNode);
}
return Status;
}
/** Add an _LPI state to a LPI node created using AmlCreateLpiNode.
AmlAddLpiState increments the Count of LPI states in the LPI node by one,
and adds the following package:
Package() {
MinResidency,
WorstCaseWakeLatency,
Flags,
ArchFlags,
ResCntFreq,
EnableParentState,
(GenericRegisterDescriptor != NULL) ? // Entry method. If a
ResourceTemplate(GenericRegisterDescriptor) : // Register is given,
Integer, // use it. Use the
// Integer otherwise.
ResourceTemplate() { // NULL Residency Counter
Register (SystemMemory, 0, 0, 0, 0)
},
ResourceTemplate() { // NULL Usage Counter
Register (SystemMemory, 0, 0, 0, 0)
},
"" // NULL State Name
},
Cf ACPI 6.3 specification, s8.4.4 "Lower Power Idle States".
@param [in] MinResidency Minimum Residency.
@param [in] WorstCaseWakeLatency Worst case wake-up latency.
@param [in] Flags Flags.
@param [in] ArchFlags Architectural flags.
@param [in] ResCntFreq Residency Counter Frequency.
@param [in] EnableParentState Enabled Parent State.
@param [in] GenericRegisterDescriptor Entry Method.
If not NULL, use this Register to
describe the entry method address.
@param [in] Integer Entry Method.
If GenericRegisterDescriptor is NULL,
take this value.
@param [in] ResidencyCounterRegister If not NULL, use it to populate the
residency counter register.
@param [in] UsageCounterRegister If not NULL, use it to populate the
usage counter register.
@param [in] StateName If not NULL, use it to populate the
state name.
@param [in] LpiNode Lpi node created with the function
AmlCreateLpiNode to which the new LPI
state is appended.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlAddLpiState (
IN UINT32 MinResidency,
IN UINT32 WorstCaseWakeLatency,
IN UINT32 Flags,
IN UINT32 ArchFlags,
IN UINT32 ResCntFreq,
IN UINT32 EnableParentState,
IN EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE *GenericRegisterDescriptor OPTIONAL,
IN UINT64 Integer OPTIONAL,
IN EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE *ResidencyCounterRegister OPTIONAL,
IN EFI_ACPI_6_3_GENERIC_ADDRESS_STRUCTURE *UsageCounterRegister OPTIONAL,
IN CHAR8 *StateName OPTIONAL,
IN AML_OBJECT_NODE_HANDLE LpiNode
)
{
EFI_STATUS Status;
AML_DATA_NODE_HANDLE RdNode;
AML_OBJECT_NODE_HANDLE PackageNode;
AML_OBJECT_NODE_HANDLE IntegerNode;
AML_OBJECT_NODE_HANDLE StringNode;
AML_OBJECT_NODE_HANDLE NewLpiPackageNode;
AML_OBJECT_NODE_HANDLE ResourceTemplateNode;
UINT32 Index;
AML_OBJECT_NODE_HANDLE CountNode;
UINT64 Count;
if ((LpiNode == NULL) ||
(AmlGetNodeType ((AML_NODE_HANDLE)LpiNode) != EAmlNodeObject) ||
(!AmlNodeHasOpCode (LpiNode, AML_NAME_OP, 0)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
RdNode = 0;
StringNode = NULL;
IntegerNode = NULL;
ResourceTemplateNode = NULL;
// AmlCreateLpiNode () created a LPI container such as:
// Name (_LPI, Package (
// 0, // Revision
// 1, // LevelId
// 0 // Count
// ))
// Get the LPI container, a PackageOp object node stored as the 2nd fixed
// argument (i.e. index 1) of LpiNode.
PackageNode = (AML_OBJECT_NODE_HANDLE)AmlGetFixedArgument (
LpiNode,
EAmlParseIndexTerm1
);
if ((PackageNode == NULL) ||
(AmlGetNodeType ((AML_NODE_HANDLE)PackageNode) != EAmlNodeObject) ||
(!AmlNodeHasOpCode (PackageNode, AML_PACKAGE_OP, 0)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
CountNode = NULL;
// The third variable argument is the LPI Count node.
for (Index = 0; Index < 3; Index++) {
CountNode = (AML_OBJECT_NODE_HANDLE)AmlGetNextVariableArgument (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)CountNode
);
if (CountNode == NULL) {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
}
Status = AmlNodeGetIntegerValue (CountNode, &Count);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlUpdateInteger (CountNode, Count + 1);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
Status = AmlCodeGenPackage (&NewLpiPackageNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
return Status;
}
// MinResidency
Status = AmlCodeGenInteger (MinResidency, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
IntegerNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)IntegerNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
IntegerNode = NULL;
// WorstCaseWakeLatency
Status = AmlCodeGenInteger (WorstCaseWakeLatency, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
IntegerNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)IntegerNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
IntegerNode = NULL;
// Flags
Status = AmlCodeGenInteger (Flags, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
IntegerNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)IntegerNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
IntegerNode = NULL;
// ArchFlags
Status = AmlCodeGenInteger (ArchFlags, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
IntegerNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)IntegerNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
IntegerNode = NULL;
// ResCntFreq
Status = AmlCodeGenInteger (ResCntFreq, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
IntegerNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)IntegerNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
IntegerNode = NULL;
// EnableParentState
Status = AmlCodeGenInteger (EnableParentState, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
IntegerNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)IntegerNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
IntegerNode = NULL;
// Entry Method
if (GenericRegisterDescriptor != NULL) {
// Entry Method: As a Register resource data
Status = AmlCodeGenResourceTemplate (&ResourceTemplateNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
ResourceTemplateNode = NULL;
goto error_handler;
}
Status = AmlCodeGenRdRegister (
GenericRegisterDescriptor->AddressSpaceId,
GenericRegisterDescriptor->RegisterBitWidth,
GenericRegisterDescriptor->RegisterBitOffset,
GenericRegisterDescriptor->Address,
GenericRegisterDescriptor->AccessSize,
NULL,
&RdNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
RdNode = NULL;
goto error_handler;
}
Status = AmlAppendRdNode (ResourceTemplateNode, RdNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
RdNode = NULL;
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)ResourceTemplateNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
ResourceTemplateNode = NULL;
} else {
// Entry Method: As an integer
Status = AmlCodeGenInteger (Integer, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
IntegerNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)IntegerNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
IntegerNode = NULL;
}
// Residency Counter Register.
Status = AmlCodeGenResourceTemplate (&ResourceTemplateNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
ResourceTemplateNode = NULL;
goto error_handler;
}
if (ResidencyCounterRegister != NULL) {
Status = AmlCodeGenRdRegister (
ResidencyCounterRegister->AddressSpaceId,
ResidencyCounterRegister->RegisterBitWidth,
ResidencyCounterRegister->RegisterBitOffset,
ResidencyCounterRegister->Address,
ResidencyCounterRegister->AccessSize,
NULL,
&RdNode
);
} else {
Status = AmlCodeGenRdRegister (
EFI_ACPI_6_4_SYSTEM_MEMORY,
0,
0,
0,
0,
NULL,
&RdNode
);
}
if (EFI_ERROR (Status)) {
ASSERT (0);
RdNode = NULL;
goto error_handler;
}
Status = AmlAppendRdNode (ResourceTemplateNode, RdNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
RdNode = NULL;
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)ResourceTemplateNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
ResourceTemplateNode = NULL;
// Usage Counter Register.
Status = AmlCodeGenResourceTemplate (&ResourceTemplateNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
ResourceTemplateNode = NULL;
goto error_handler;
}
if (UsageCounterRegister != NULL) {
Status = AmlCodeGenRdRegister (
UsageCounterRegister->AddressSpaceId,
UsageCounterRegister->RegisterBitWidth,
UsageCounterRegister->RegisterBitOffset,
UsageCounterRegister->Address,
UsageCounterRegister->AccessSize,
NULL,
&RdNode
);
} else {
Status = AmlCodeGenRdRegister (
EFI_ACPI_6_4_SYSTEM_MEMORY,
0,
0,
0,
0,
NULL,
&RdNode
);
}
if (EFI_ERROR (Status)) {
ASSERT (0);
RdNode = NULL;
goto error_handler;
}
Status = AmlAppendRdNode (ResourceTemplateNode, RdNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
RdNode = NULL;
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)ResourceTemplateNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
ResourceTemplateNode = NULL;
// State name.
if (UsageCounterRegister != NULL) {
Status = AmlCodeGenString (StateName, &StringNode);
} else {
Status = AmlCodeGenString ("", &StringNode);
}
if (EFI_ERROR (Status)) {
ASSERT (0);
StringNode = NULL;
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewLpiPackageNode,
(AML_NODE_HANDLE)StringNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
StringNode = NULL;
// Add the new LPI state to the LpiNode.
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)NewLpiPackageNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto error_handler;
}
return Status;
error_handler:
if (RdNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)RdNode);
}
if (NewLpiPackageNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)NewLpiPackageNode);
}
if (StringNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)StringNode);
}
if (IntegerNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)IntegerNode);
}
if (ResourceTemplateNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)ResourceTemplateNode);
}
return Status;
}
/** AML code generation for a _DSD device data object.
AmlAddDeviceDataDescriptorPackage (Uuid, DsdNode, PackageNode) is
equivalent of the following ASL code:
ToUUID(Uuid),
Package () {}
Cf ACPI 6.4 specification, s6.2.5 "_DSD (Device Specific Data)".
_DSD (Device Specific Data) Implementation Guide
https://github.com/UEFI/DSD-Guide
Per s3. "'Well-Known _DSD UUIDs and Data Structure Formats'"
If creating a Device Properties data then UUID daffd814-6eba-4d8c-8a91-bc9bbf4aa301 should be used.
@param [in] Uuid The Uuid of the descriptor to be created
@param [in] DsdNode Node of the DSD Package.
@param [out] PackageNode If success, contains the created package node.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlAddDeviceDataDescriptorPackage (
IN CONST EFI_GUID *Uuid,
IN AML_OBJECT_NODE_HANDLE DsdNode,
OUT AML_OBJECT_NODE_HANDLE *PackageNode
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *UuidNode;
AML_DATA_NODE *UuidDataNode;
AML_OBJECT_NODE_HANDLE DsdEntryList;
if ((Uuid == NULL) ||
(PackageNode == NULL) ||
(AmlGetNodeType ((AML_NODE_HANDLE)DsdNode) != EAmlNodeObject) ||
(!AmlNodeHasOpCode (DsdNode, AML_NAME_OP, 0)) ||
!AmlNameOpCompareName (DsdNode, "_DSD"))
{
ASSERT_EFI_ERROR (EFI_INVALID_PARAMETER);
return EFI_INVALID_PARAMETER;
}
// Get the Package object node of the _DSD node,
// which is the 2nd fixed argument (i.e. index 1).
DsdEntryList = (AML_OBJECT_NODE_HANDLE)AmlGetFixedArgument (
DsdNode,
EAmlParseIndexTerm1
);
if ((DsdEntryList == NULL) ||
(AmlGetNodeType ((AML_NODE_HANDLE)DsdEntryList) != EAmlNodeObject) ||
(!AmlNodeHasOpCode (DsdEntryList, AML_PACKAGE_OP, 0)))
{
ASSERT_EFI_ERROR (EFI_INVALID_PARAMETER);
return EFI_INVALID_PARAMETER;
}
*PackageNode = NULL;
UuidDataNode = NULL;
Status = AmlCodeGenBuffer (NULL, 0, &UuidNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeRaw,
(CONST UINT8 *)Uuid,
sizeof (EFI_GUID),
&UuidDataNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HEADER *)UuidNode,
(AML_NODE_HEADER *)UuidDataNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
UuidDataNode = NULL;
// Append to the list of _DSD entries.
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)DsdEntryList,
(AML_NODE_HANDLE)UuidNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlCodeGenPackage (PackageNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler_detach;
}
// Append to the list of _DSD entries.
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)DsdEntryList,
(AML_NODE_HANDLE)*PackageNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler_detach;
}
return Status;
error_handler_detach:
if (UuidNode != NULL) {
AmlDetachNode ((AML_NODE_HANDLE)UuidNode);
}
error_handler:
if (UuidNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)UuidNode);
}
if (*PackageNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)*PackageNode);
*PackageNode = NULL;
}
if (UuidDataNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)UuidDataNode);
}
return Status;
}
/** AML code generation to add a package with a name and value,
to a parent package.
This is useful to build the _DSD package but can be used in other cases.
AmlAddNameIntegerPackage ("Name", Value, PackageNode) is
equivalent of the following ASL code:
Package (2) {"Name", Value}
Cf ACPI 6.4 specification, s6.2.5 "_DSD (Device Specific Data)".
@param [in] Name String to place in first entry of package
@param [in] Value Integer to place in second entry of package
@param [in] PackageNode Package to add new sub package to.
@retval EFI_SUCCESS Success.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlAddNameIntegerPackage (
IN CHAR8 *Name,
IN UINT64 Value,
IN AML_OBJECT_NODE_HANDLE PackageNode
)
{
EFI_STATUS Status;
AML_OBJECT_NODE *NameNode;
AML_OBJECT_NODE *ValueNode;
AML_OBJECT_NODE *NewPackageNode;
if ((Name == NULL) ||
(AmlGetNodeType ((AML_NODE_HANDLE)PackageNode) != EAmlNodeObject) ||
(!AmlNodeHasOpCode (PackageNode, AML_PACKAGE_OP, 0)))
{
ASSERT_EFI_ERROR (EFI_INVALID_PARAMETER);
return EFI_INVALID_PARAMETER;
}
NameNode = NULL;
ValueNode = NULL;
// The new package entry.
Status = AmlCodeGenPackage (&NewPackageNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
Status = AmlCodeGenString (Name, &NameNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewPackageNode,
(AML_NODE_HANDLE)NameNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
NameNode = NULL;
Status = AmlCodeGenInteger (Value, &ValueNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)NewPackageNode,
(AML_NODE_HANDLE)ValueNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
ValueNode = NULL;
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)NewPackageNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
return Status;
error_handler:
if (NewPackageNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)NewPackageNode);
}
if (NameNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)NameNode);
}
if (ValueNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)ValueNode);
}
return Status;
}
/** Adds a register to the package
@ingroup CodeGenApis
@param [in] Register If provided, register that will be added to package.
otherwise NULL register will be added
@param [in] PackageNode Package to add value to
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlAddRegisterToPackage (
IN EFI_ACPI_6_4_GENERIC_ADDRESS_STRUCTURE *Register OPTIONAL,
IN AML_OBJECT_NODE_HANDLE PackageNode
)
{
EFI_STATUS Status;
AML_DATA_NODE_HANDLE RdNode;
AML_OBJECT_NODE_HANDLE ResourceTemplateNode;
RdNode = NULL;
Status = AmlCodeGenResourceTemplate (&ResourceTemplateNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
if (Register != NULL) {
Status = AmlCodeGenRdRegister (
Register->AddressSpaceId,
Register->RegisterBitWidth,
Register->RegisterBitOffset,
Register->Address,
Register->AccessSize,
NULL,
&RdNode
);
} else {
Status = AmlCodeGenRdRegister (
EFI_ACPI_6_4_SYSTEM_MEMORY,
0,
0,
0,
0,
NULL,
&RdNode
);
}
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAppendRdNode (ResourceTemplateNode, RdNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
RdNode = NULL;
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)ResourceTemplateNode
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
return Status;
error_handler:
if (RdNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)RdNode);
}
if (ResourceTemplateNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)ResourceTemplateNode);
}
return Status;
}
/** Utility function to check if generic address points to NULL
@param [in] Address Pointer to the Generic address
@retval TRUE Address is system memory with an Address of 0.
@retval FALSE Address does not point to NULL.
**/
STATIC
BOOLEAN
EFIAPI
IsNullGenericAddress (
IN EFI_ACPI_6_4_GENERIC_ADDRESS_STRUCTURE *Address
)
{
if ((Address == NULL) ||
((Address->AddressSpaceId == EFI_ACPI_6_4_SYSTEM_MEMORY) &&
(Address->Address == 0x0)))
{
return TRUE;
}
return FALSE;
}
/** Adds an integer or register to the package
@ingroup CodeGenApis
@param [in] Register If provided, register that will be added to package
@param [in] Integer If Register is NULL, integer that will be added to the package
@param [in] PackageNode Package to add value to
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
STATIC
EFI_STATUS
EFIAPI
AmlAddRegisterOrIntegerToPackage (
IN EFI_ACPI_6_4_GENERIC_ADDRESS_STRUCTURE *Register OPTIONAL,
IN UINT32 Integer,
IN AML_OBJECT_NODE_HANDLE PackageNode
)
{
EFI_STATUS Status;
AML_OBJECT_NODE_HANDLE IntegerNode;
IntegerNode = NULL;
if (!IsNullGenericAddress (Register)) {
Status = AmlAddRegisterToPackage (Register, PackageNode);
} else {
Status = AmlCodeGenInteger (Integer, &IntegerNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)PackageNode,
(AML_NODE_HANDLE)IntegerNode
);
}
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
if (IntegerNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)IntegerNode);
}
}
return Status;
}
/** Create a _CPC node.
Creates and optionally adds the following node
Name(_CPC, Package()
{
NumEntries, // Integer
Revision, // Integer
HighestPerformance, // Integer or Buffer (Resource Descriptor)
NominalPerformance, // Integer or Buffer (Resource Descriptor)
LowestNonlinearPerformance, // Integer or Buffer (Resource Descriptor)
LowestPerformance, // Integer or Buffer (Resource Descriptor)
GuaranteedPerformanceRegister, // Buffer (Resource Descriptor)
DesiredPerformanceRegister , // Buffer (Resource Descriptor)
MinimumPerformanceRegister , // Buffer (Resource Descriptor)
MaximumPerformanceRegister , // Buffer (Resource Descriptor)
PerformanceReductionToleranceRegister, // Buffer (Resource Descriptor)
TimeWindowRegister, // Buffer (Resource Descriptor)
CounterWraparoundTime, // Integer or Buffer (Resource Descriptor)
ReferencePerformanceCounterRegister, // Buffer (Resource Descriptor)
DeliveredPerformanceCounterRegister, // Buffer (Resource Descriptor)
PerformanceLimitedRegister, // Buffer (Resource Descriptor)
CPPCEnableRegister // Buffer (Resource Descriptor)
AutonomousSelectionEnable, // Integer or Buffer (Resource Descriptor)
AutonomousActivityWindowRegister, // Buffer (Resource Descriptor)
EnergyPerformancePreferenceRegister, // Buffer (Resource Descriptor)
ReferencePerformance // Integer or Buffer (Resource Descriptor)
LowestFrequency, // Integer or Buffer (Resource Descriptor)
NominalFrequency // Integer or Buffer (Resource Descriptor)
})
If resource buffer is NULL then integer will be used.
Cf. ACPI 6.4, s8.4.7.1 _CPC (Continuous Performance Control)
@ingroup CodeGenApis
@param [in] CpcInfo CpcInfo object
@param [in] ParentNode If provided, set ParentNode as the parent
of the node created.
@param [out] NewCpcNode If success and provided, contains the created node.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_INVALID_PARAMETER Invalid parameter.
@retval EFI_OUT_OF_RESOURCES Failed to allocate memory.
**/
EFI_STATUS
EFIAPI
AmlCreateCpcNode (
IN AML_CPC_INFO *CpcInfo,
IN AML_NODE_HANDLE ParentNode OPTIONAL,
OUT AML_OBJECT_NODE_HANDLE *NewCpcNode OPTIONAL
)
{
EFI_STATUS Status;
AML_OBJECT_NODE_HANDLE CpcNode;
AML_OBJECT_NODE_HANDLE CpcPackage;
UINT32 NumberOfEntries;
if ((CpcInfo == NULL) ||
((ParentNode == NULL) && (NewCpcNode == NULL)))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
// Revision 3 per ACPI 6.4 specification
if (CpcInfo->Revision == 3) {
// NumEntries 23 per ACPI 6.4 specification
NumberOfEntries = 23;
} else {
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
if ((IsNullGenericAddress (&CpcInfo->HighestPerformanceBuffer) &&
(CpcInfo->HighestPerformanceInteger == 0)) ||
(IsNullGenericAddress (&CpcInfo->NominalPerformanceBuffer) &&
(CpcInfo->NominalPerformanceInteger == 0)) ||
(IsNullGenericAddress (&CpcInfo->LowestNonlinearPerformanceBuffer) &&
(CpcInfo->LowestNonlinearPerformanceInteger == 0)) ||
(IsNullGenericAddress (&CpcInfo->LowestPerformanceBuffer) &&
(CpcInfo->LowestPerformanceInteger == 0)) ||
IsNullGenericAddress (&CpcInfo->DesiredPerformanceRegister) ||
IsNullGenericAddress (&CpcInfo->ReferencePerformanceCounterRegister) ||
IsNullGenericAddress (&CpcInfo->DeliveredPerformanceCounterRegister) ||
IsNullGenericAddress (&CpcInfo->PerformanceLimitedRegister))
{
ASSERT (0);
return EFI_INVALID_PARAMETER;
}
CpcPackage = NULL;
Status = AmlCodeGenNamePackage ("_CPC", NULL, &CpcNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
return Status;
}
// Get the Package object node of the _CPC node,
// which is the 2nd fixed argument (i.e. index 1).
CpcPackage = (AML_OBJECT_NODE_HANDLE)AmlGetFixedArgument (
CpcNode,
EAmlParseIndexTerm1
);
if ((CpcPackage == NULL) ||
(AmlGetNodeType ((AML_NODE_HANDLE)CpcPackage) != EAmlNodeObject) ||
(!AmlNodeHasOpCode (CpcPackage, AML_PACKAGE_OP, 0)))
{
ASSERT (0);
Status = EFI_INVALID_PARAMETER;
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
NULL,
NumberOfEntries,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
NULL,
CpcInfo->Revision,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
&CpcInfo->HighestPerformanceBuffer,
CpcInfo->HighestPerformanceInteger,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
&CpcInfo->NominalPerformanceBuffer,
CpcInfo->NominalPerformanceInteger,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
&CpcInfo->LowestNonlinearPerformanceBuffer,
CpcInfo->LowestNonlinearPerformanceInteger,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
&CpcInfo->LowestPerformanceBuffer,
CpcInfo->LowestPerformanceInteger,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->GuaranteedPerformanceRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->DesiredPerformanceRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->MinimumPerformanceRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->MaximumPerformanceRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->PerformanceReductionToleranceRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->TimeWindowRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
&CpcInfo->CounterWraparoundTimeBuffer,
CpcInfo->CounterWraparoundTimeInteger,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->ReferencePerformanceCounterRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->DeliveredPerformanceCounterRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->PerformanceLimitedRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->CPPCEnableRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
&CpcInfo->AutonomousSelectionEnableBuffer,
CpcInfo->AutonomousSelectionEnableInteger,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->AutonomousActivityWindowRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterToPackage (&CpcInfo->EnergyPerformancePreferenceRegister, CpcPackage);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
&CpcInfo->ReferencePerformanceBuffer,
CpcInfo->ReferencePerformanceInteger,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
&CpcInfo->LowestFrequencyBuffer,
CpcInfo->LowestFrequencyInteger,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = AmlAddRegisterOrIntegerToPackage (
&CpcInfo->NominalFrequencyBuffer,
CpcInfo->NominalFrequencyInteger,
CpcPackage
);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
Status = LinkNode (CpcNode, ParentNode, NewCpcNode);
if (EFI_ERROR (Status)) {
ASSERT_EFI_ERROR (Status);
goto error_handler;
}
return Status;
error_handler:
AmlDeleteTree ((AML_NODE_HANDLE)CpcNode);
return Status;
}
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