Add support to add Return objects via AML that pass a single integer
argument to the named method.
Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>
---
.../Include/Library/AmlLib/AmlLib.h | 54 ++++
.../Common/AmlLib/CodeGen/AmlCodeGen.c | 244 ++++++++++++++++++
2 files changed, 298 insertions(+)
diff --git a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
index d201ae9499..b82c7a3ce8 100644
--- a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
+++ b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
@@ -1194,6 +1194,60 @@ AmlCodeGenMethodRetInteger (
OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
);
+/** AML code generation for a method returning a NameString that takes an
+ integer argument.
+
+ AmlCodeGenMethodRetNameStringIntegerArgument (
+ "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
+ );
+ is equivalent of the following ASL code:
+ Method(MET0, 1, Serialized, 3) {
+ Return (MET1 (5))
+ }
+
+ 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] IntegerArgument Argument to pass 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
+AmlCodeGenMethodRetNameStringIntegerArgument (
+ IN CONST CHAR8 *MethodNameString,
+ IN CONST CHAR8 *ReturnedNameString OPTIONAL,
+ IN UINT8 NumArgs,
+ IN BOOLEAN IsSerialized,
+ IN UINT8 SyncLevel,
+ IN UINT64 IntegerArgument,
+ IN AML_NODE_HANDLE ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
+ );
+
/** Create a _LPI name.
AmlCreateLpiNode ("_LPI", 0, 1, ParentNode, &LpiNode) is
diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
index 88537b7e2d..ea519d1aa8 100644
--- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
+++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
@@ -1881,6 +1881,138 @@ AmlCodeGenReturnInteger (
return Status;
}
+/** AML code generation for a Return object node,
+ returning the object as an input NameString with a integer argument.
+
+ AmlCodeGenReturn ("NAM1", 6, ParentNode, NewObjectNode) is
+ equivalent of the following ASL code:
+ Return(NAM1 (6))
+
+ 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] Integer Argument to pass to the NameString
+ @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
+AmlCodeGenReturnNameStringIntegerArgument (
+ IN CONST CHAR8 *NameString,
+ IN UINT64 Integer,
+ IN AML_NODE_HEADER *ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ AML_DATA_NODE *DataNode;
+ AML_OBJECT_NODE *IntNode;
+ CHAR8 *AmlNameString;
+ UINT32 AmlNameStringSize;
+ AML_OBJECT_NODE *ObjectNode;
+
+ DataNode = NULL;
+ IntNode = NULL;
+ ObjectNode = 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;
+ }
+
+ Status = AmlCodeGenInteger (Integer, &IntNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ // AmlCodeGenReturn() deletes DataNode if error.
+ Status = AmlCodeGenReturn (
+ (AML_NODE_HEADER *)DataNode,
+ ParentNode,
+ &ObjectNode
+ );
+
+ // DataNode is either deleted or added to ObjectNode, set to NULL so we don't
+ // delete it again
+ DataNode = NULL;
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)ObjectNode,
+ (AML_NODE_HANDLE)IntNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ if (NewObjectNode != 0) {
+ *NewObjectNode = ObjectNode;
+ }
+
+exit_handler:
+ if (AmlNameString != NULL) {
+ FreePool (AmlNameString);
+ }
+
+ if (IntNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
+ }
+
+ if (DataNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)DataNode);
+ }
+
+ if (ObjectNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)ObjectNode);
+ }
+
+ return Status;
+}
+
/** AML code generation for a method returning a NameString.
AmlCodeGenMethodRetNameString (
@@ -1989,6 +2121,118 @@ error_handler:
return Status;
}
+/** AML code generation for a method returning a NameString that takes an
+ integer argument.
+
+ AmlCodeGenMethodRetNameStringIntegerArgument (
+ "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
+ );
+ is equivalent of the following ASL code:
+ Method(MET0, 1, Serialized, 3) {
+ Return (MET1 (5))
+ }
+
+ 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] IntegerArgument Argument to pass 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
+AmlCodeGenMethodRetNameStringIntegerArgument (
+ IN CONST CHAR8 *MethodNameString,
+ IN CONST CHAR8 *ReturnedNameString OPTIONAL,
+ IN UINT8 NumArgs,
+ IN BOOLEAN IsSerialized,
+ IN UINT8 SyncLevel,
+ IN UINT64 IntegerArgument,
+ 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 = AmlCodeGenReturnNameStringIntegerArgument (
+ ReturnedNameString,
+ IntegerArgument,
+ (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 (
--
2.25.1
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-=-=-=-=-=-=-=-=-=-=-=-Hi Jeff,
Thank you for this patch.
Please see my response inline marked [SAMI].
Regards,
Sami Mujawar
On 18/09/2023 04:46 pm, Jeff Brasen wrote:
> Add support to add Return objects via AML that pass a single integer
>
> argument to the named method.
>
>
>
> Signed-off-by: Jeff Brasen<jbrasen@nvidia.com>
>
> ---
>
> .../Include/Library/AmlLib/AmlLib.h | 54 ++++
>
> .../Common/AmlLib/CodeGen/AmlCodeGen.c | 244 ++++++++++++++++++
>
> 2 files changed, 298 insertions(+)
>
>
>
> diff --git a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
>
> index d201ae9499..b82c7a3ce8 100644
>
> --- a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
>
> +++ b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
>
> @@ -1194,6 +1194,60 @@ AmlCodeGenMethodRetInteger (
>
> OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
>
> );
>
>
>
> +/** AML code generation for a method returning a NameString that takes an
>
> + integer argument.
>
> +
>
> + AmlCodeGenMethodRetNameStringIntegerArgument (
>
> + "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
>
> + );
>
> + is equivalent of the following ASL code:
>
> + Method(MET0, 1, Serialized, 3) {
>
> + Return (MET1 (5))
>
> + }
>
> +
>
> + 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] IntegerArgument Argument to pass 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
>
> +AmlCodeGenMethodRetNameStringIntegerArgument (
>
> + IN CONST CHAR8 *MethodNameString,
>
> + IN CONST CHAR8 *ReturnedNameString OPTIONAL,
>
> + IN UINT8 NumArgs,
>
> + IN BOOLEAN IsSerialized,
>
> + IN UINT8 SyncLevel,
>
> + IN UINT64 IntegerArgument,
>
> + IN AML_NODE_HANDLE ParentNode OPTIONAL,
>
> + OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
>
> + );
>
> +
>
> /** Create a _LPI name.
>
>
>
> AmlCreateLpiNode ("_LPI", 0, 1, ParentNode, &LpiNode) is
>
> diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
>
> index 88537b7e2d..ea519d1aa8 100644
>
> --- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
>
> +++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
>
> @@ -1881,6 +1881,138 @@ AmlCodeGenReturnInteger (
>
> return Status;
>
> }
>
>
>
> +/** AML code generation for a Return object node,
>
> + returning the object as an input NameString with a integer argument.
>
> +
>
> + AmlCodeGenReturn ("NAM1", 6, ParentNode, NewObjectNode) is
>
> + equivalent of the following ASL code:
>
> + Return(NAM1 (6))
>
> +
>
> + 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] Integer Argument to pass to the NameString
>
> + @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
>
> +AmlCodeGenReturnNameStringIntegerArgument (
>
> + IN CONST CHAR8 *NameString,
>
> + IN UINT64 Integer,
>
> + IN AML_NODE_HEADER *ParentNode OPTIONAL,
>
> + OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
>
> + )
>
> +{
>
> + EFI_STATUS Status;
>
> + AML_DATA_NODE *DataNode;
>
> + AML_OBJECT_NODE *IntNode;
>
> + CHAR8 *AmlNameString;
>
> + UINT32 AmlNameStringSize;
>
> + AML_OBJECT_NODE *ObjectNode;
>
> +
>
> + DataNode = NULL;
>
> + IntNode = NULL;
>
> + ObjectNode = 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;
>
> + }
>
> +
>
> + Status = AmlCodeGenInteger (Integer, &IntNode);
>
> + if (EFI_ERROR (Status)) {
>
> + ASSERT (0);
>
> + goto exit_handler;
>
> + }
>
> +
>
> + // AmlCodeGenReturn() deletes DataNode if error.
>
> + Status = AmlCodeGenReturn (
>
> + (AML_NODE_HEADER *)DataNode,
>
> + ParentNode,
>
> + &ObjectNode
>
> + );
>
> +
>
> + // DataNode is either deleted or added to ObjectNode, set to NULL so we don't
>
> + // delete it again
>
> + DataNode = NULL;
>
> + if (EFI_ERROR (Status)) {
>
> + ASSERT (0);
>
> + goto exit_handler;
>
> + }
>
> +
>
> + Status = AmlVarListAddTail (
>
> + (AML_NODE_HANDLE)ObjectNode,
>
> + (AML_NODE_HANDLE)IntNode
>
> + );
>
> + if (EFI_ERROR (Status)) {
>
> + ASSERT (0);
>
> + goto exit_handler;
>
> + }
>
> +
>
> + if (NewObjectNode != 0) {
>
> + *NewObjectNode = ObjectNode;
>
> + }
>
> +
>
> +exit_handler:
>
> + if (AmlNameString != NULL) {
>
> + FreePool (AmlNameString);
>
> + }
>
> +
>
> + if (IntNode != NULL) {
>
> + AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
>
> + }
>
> +
>
> + if (DataNode != NULL) {
>
> + AmlDeleteTree ((AML_NODE_HANDLE)DataNode);
>
> + }
>
> +
>
> + if (ObjectNode != NULL) {
>
> + AmlDeleteTree ((AML_NODE_HANDLE)ObjectNode);
>
> + }
>
> +
>
> + return Status;
>
> +}
[SAMI] I think the error handling in the above function can be
simplified as below:
...
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenReturnNameStringIntegerArgument (
INCONSTCHAR8 *NameString,
IN UINT64 Integer,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *DataNode;
AML_OBJECT_NODE *IntNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
AML_OBJECT_NODE *ObjectNode;
DataNode = NULL;
IntNode = NULL;
ObjectNode = NULL;
Status = ConvertAslNameToAmlName (NameString, &AmlNameString);
if(EFI_ERROR (Status)) {
ASSERT(0);
returnStatus;
}
Status = AmlGetNameStringSize (AmlNameString, &AmlNameStringSize);
if(EFI_ERROR (Status)) {
ASSERT(0);
gotoexit_handler;
}
Status = AmlCodeGenInteger (Integer, &IntNode);
if(EFI_ERROR (Status)) {
ASSERT(0);
gotoexit_handler;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if(EFI_ERROR (Status)) {
ASSERT(0);
gotoexit_handler1;
}
// AmlCodeGenReturn() deletes DataNode if error.
Status = AmlCodeGenReturn (
(AML_NODE_HEADER *)DataNode,
ParentNode,
&ObjectNode
);
if(EFI_ERROR (Status)) {
ASSERT(0);
gotoexit_handler1;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)ObjectNode,
(AML_NODE_HANDLE)IntNode
);
if(EFI_ERROR (Status)) {
// ObjectNode is already attached to ParentNode in AmlCodeGenReturn(),
// so no need to free it here, it will be deleted when deleting the
// ParentNode tree
ASSERT(0);
gotoexit_handler1;
}
if(NewObjectNode != 0) {
*NewObjectNode = ObjectNode;
}
gotoexit_handler;
exit_handler1:
if(IntNode != NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
}
exit_handler:
if(AmlNameString != NULL) {
FreePool (AmlNameString);
}
returnStatus;
}
Please let me know if you agree with this, and I will make this change
before merging.
[/SAMI]
> +
>
> /** AML code generation for a method returning a NameString.
>
>
>
> AmlCodeGenMethodRetNameString (
>
> @@ -1989,6 +2121,118 @@ error_handler:
>
> return Status;
>
> }
>
>
>
> +/** AML code generation for a method returning a NameString that takes an
>
> + integer argument.
>
> +
>
> + AmlCodeGenMethodRetNameStringIntegerArgument (
>
> + "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
>
> + );
>
> + is equivalent of the following ASL code:
>
> + Method(MET0, 1, Serialized, 3) {
>
> + Return (MET1 (5))
>
> + }
>
> +
>
> + 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] IntegerArgument Argument to pass 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
>
> +AmlCodeGenMethodRetNameStringIntegerArgument (
>
> + IN CONST CHAR8 *MethodNameString,
>
> + IN CONST CHAR8 *ReturnedNameString OPTIONAL,
>
> + IN UINT8 NumArgs,
>
> + IN BOOLEAN IsSerialized,
>
> + IN UINT8 SyncLevel,
>
> + IN UINT64 IntegerArgument,
>
> + 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 = AmlCodeGenReturnNameStringIntegerArgument (
>
> + ReturnedNameString,
>
> + IntegerArgument,
>
> + (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 (
>
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Only thing I see is if AmlCodeGenInteger fails we don’t delete DataNode right?
From: Sami Mujawar <sami.mujawar@arm.com>
Sent: Thursday, September 21, 2023 10:49 AM
To: Jeff Brasen <jbrasen@nvidia.com>; devel@edk2.groups.io
Cc: pierre.gondois@arm.com; Swatisri Kantamsetti <swatisrik@nvidia.com>; Ashish Singhal <ashishsingha@nvidia.com>; nd@arm.com
Subject: Re: [PATCH v4 2/4] DynamicTablesPkg: Add support for simple method invocation.
External email: Use caution opening links or attachments
Hi Jeff,
Thank you for this patch.
Please see my response inline marked [SAMI].
Regards,
Sami Mujawar
On 18/09/2023 04:46 pm, Jeff Brasen wrote:
Add support to add Return objects via AML that pass a single integer
argument to the named method.
Signed-off-by: Jeff Brasen <jbrasen@nvidia.com><mailto:jbrasen@nvidia.com>
---
.../Include/Library/AmlLib/AmlLib.h | 54 ++++
.../Common/AmlLib/CodeGen/AmlCodeGen.c | 244 ++++++++++++++++++
2 files changed, 298 insertions(+)
diff --git a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
index d201ae9499..b82c7a3ce8 100644
--- a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
+++ b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
@@ -1194,6 +1194,60 @@ AmlCodeGenMethodRetInteger (
OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
);
+/** AML code generation for a method returning a NameString that takes an
+ integer argument.
+
+ AmlCodeGenMethodRetNameStringIntegerArgument (
+ "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
+ );
+ is equivalent of the following ASL code:
+ Method(MET0, 1, Serialized, 3) {
+ Return (MET1 (5))
+ }
+
+ 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] IntegerArgument Argument to pass 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
+AmlCodeGenMethodRetNameStringIntegerArgument (
+ IN CONST CHAR8 *MethodNameString,
+ IN CONST CHAR8 *ReturnedNameString OPTIONAL,
+ IN UINT8 NumArgs,
+ IN BOOLEAN IsSerialized,
+ IN UINT8 SyncLevel,
+ IN UINT64 IntegerArgument,
+ IN AML_NODE_HANDLE ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
+ );
+
/** Create a _LPI name.
AmlCreateLpiNode ("_LPI", 0, 1, ParentNode, &LpiNode) is
diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
index 88537b7e2d..ea519d1aa8 100644
--- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
+++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
@@ -1881,6 +1881,138 @@ AmlCodeGenReturnInteger (
return Status;
}
+/** AML code generation for a Return object node,
+ returning the object as an input NameString with a integer argument.
+
+ AmlCodeGenReturn ("NAM1", 6, ParentNode, NewObjectNode) is
+ equivalent of the following ASL code:
+ Return(NAM1 (6))
+
+ 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] Integer Argument to pass to the NameString
+ @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
+AmlCodeGenReturnNameStringIntegerArgument (
+ IN CONST CHAR8 *NameString,
+ IN UINT64 Integer,
+ IN AML_NODE_HEADER *ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ AML_DATA_NODE *DataNode;
+ AML_OBJECT_NODE *IntNode;
+ CHAR8 *AmlNameString;
+ UINT32 AmlNameStringSize;
+ AML_OBJECT_NODE *ObjectNode;
+
+ DataNode = NULL;
+ IntNode = NULL;
+ ObjectNode = 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;
+ }
+
+ Status = AmlCodeGenInteger (Integer, &IntNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ // AmlCodeGenReturn() deletes DataNode if error.
+ Status = AmlCodeGenReturn (
+ (AML_NODE_HEADER *)DataNode,
+ ParentNode,
+ &ObjectNode
+ );
+
+ // DataNode is either deleted or added to ObjectNode, set to NULL so we don't
+ // delete it again
+ DataNode = NULL;
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)ObjectNode,
+ (AML_NODE_HANDLE)IntNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ if (NewObjectNode != 0) {
+ *NewObjectNode = ObjectNode;
+ }
+
+exit_handler:
+ if (AmlNameString != NULL) {
+ FreePool (AmlNameString);
+ }
+
+ if (IntNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
+ }
+
+ if (DataNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)DataNode);
+ }
+
+ if (ObjectNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)ObjectNode);
+ }
+
+ return Status;
+}
[SAMI] I think the error handling in the above function can be simplified as below:
...
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenReturnNameStringIntegerArgument (
IN CONST CHAR8 *NameString,
IN UINT64 Integer,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode
OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *DataNode;
AML_OBJECT_NODE *IntNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
AML_OBJECT_NODE *ObjectNode;
DataNode = NULL;
IntNode = NULL;
ObjectNode = 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 = AmlCodeGenInteger (Integer, &IntNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler1;
}
// AmlCodeGenReturn() deletes DataNode if error.
Status = AmlCodeGenReturn (
(AML_NODE_HEADER *)DataNode,
ParentNode,
&ObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler1;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)ObjectNode,
(AML_NODE_HANDLE)IntNode
);
if (EFI_ERROR (Status)) {
// ObjectNode is already attached to ParentNode in AmlCodeGenReturn(),
// so no need to free it here, it will be deleted when deleting the
// ParentNode tree
ASSERT (0);
goto exit_handler1;
}
if (NewObjectNode !=
0) {
*NewObjectNode = ObjectNode;
}
goto exit_handler;
exit_handler1:
if (IntNode !=
NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
}
exit_handler:
if (AmlNameString !=
NULL) {
FreePool (AmlNameString);
}
return Status;
}
Please let me know if you agree with this, and I will make this change before merging.
[/SAMI]
+
/** AML code generation for a method returning a NameString.
AmlCodeGenMethodRetNameString (
@@ -1989,6 +2121,118 @@ error_handler:
return Status;
}
+/** AML code generation for a method returning a NameString that takes an
+ integer argument.
+
+ AmlCodeGenMethodRetNameStringIntegerArgument (
+ "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
+ );
+ is equivalent of the following ASL code:
+ Method(MET0, 1, Serialized, 3) {
+ Return (MET1 (5))
+ }
+
+ 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] IntegerArgument Argument to pass 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
+AmlCodeGenMethodRetNameStringIntegerArgument (
+ IN CONST CHAR8 *MethodNameString,
+ IN CONST CHAR8 *ReturnedNameString OPTIONAL,
+ IN UINT8 NumArgs,
+ IN BOOLEAN IsSerialized,
+ IN UINT8 SyncLevel,
+ IN UINT64 IntegerArgument,
+ 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 = AmlCodeGenReturnNameStringIntegerArgument (
+ ReturnedNameString,
+ IntegerArgument,
+ (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 (
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Hi Jeff,
Yes, I recorded the integer node and data node creation.
Regards,
Sami Mujawar
________________________________
From: Jeff Brasen <jbrasen@nvidia.com>
Sent: 21 September 2023 18:38
To: Sami Mujawar <Sami.Mujawar@arm.com>; devel@edk2.groups.io <devel@edk2.groups.io>
Cc: Pierre Gondois <Pierre.Gondois@arm.com>; Swatisri Kantamsetti <swatisrik@nvidia.com>; Ashish Singhal <ashishsingha@nvidia.com>; nd <nd@arm.com>
Subject: RE: [PATCH v4 2/4] DynamicTablesPkg: Add support for simple method invocation.
Only thing I see is if AmlCodeGenInteger fails we don’t delete DataNode right?
From: Sami Mujawar <sami.mujawar@arm.com>
Sent: Thursday, September 21, 2023 10:49 AM
To: Jeff Brasen <jbrasen@nvidia.com>; devel@edk2.groups.io
Cc: pierre.gondois@arm.com; Swatisri Kantamsetti <swatisrik@nvidia.com>; Ashish Singhal <ashishsingha@nvidia.com>; nd@arm.com
Subject: Re: [PATCH v4 2/4] DynamicTablesPkg: Add support for simple method invocation.
External email: Use caution opening links or attachments
Hi Jeff,
Thank you for this patch.
Please see my response inline marked [SAMI].
Regards,
Sami Mujawar
On 18/09/2023 04:46 pm, Jeff Brasen wrote:
Add support to add Return objects via AML that pass a single integer
argument to the named method.
Signed-off-by: Jeff Brasen <jbrasen@nvidia.com><mailto:jbrasen@nvidia.com>
---
.../Include/Library/AmlLib/AmlLib.h | 54 ++++
.../Common/AmlLib/CodeGen/AmlCodeGen.c | 244 ++++++++++++++++++
2 files changed, 298 insertions(+)
diff --git a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
index d201ae9499..b82c7a3ce8 100644
--- a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
+++ b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
@@ -1194,6 +1194,60 @@ AmlCodeGenMethodRetInteger (
OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
);
+/** AML code generation for a method returning a NameString that takes an
+ integer argument.
+
+ AmlCodeGenMethodRetNameStringIntegerArgument (
+ "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
+ );
+ is equivalent of the following ASL code:
+ Method(MET0, 1, Serialized, 3) {
+ Return (MET1 (5))
+ }
+
+ 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] IntegerArgument Argument to pass 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
+AmlCodeGenMethodRetNameStringIntegerArgument (
+ IN CONST CHAR8 *MethodNameString,
+ IN CONST CHAR8 *ReturnedNameString OPTIONAL,
+ IN UINT8 NumArgs,
+ IN BOOLEAN IsSerialized,
+ IN UINT8 SyncLevel,
+ IN UINT64 IntegerArgument,
+ IN AML_NODE_HANDLE ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
+ );
+
/** Create a _LPI name.
AmlCreateLpiNode ("_LPI", 0, 1, ParentNode, &LpiNode) is
diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
index 88537b7e2d..ea519d1aa8 100644
--- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
+++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
@@ -1881,6 +1881,138 @@ AmlCodeGenReturnInteger (
return Status;
}
+/** AML code generation for a Return object node,
+ returning the object as an input NameString with a integer argument.
+
+ AmlCodeGenReturn ("NAM1", 6, ParentNode, NewObjectNode) is
+ equivalent of the following ASL code:
+ Return(NAM1 (6))
+
+ 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] Integer Argument to pass to the NameString
+ @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
+AmlCodeGenReturnNameStringIntegerArgument (
+ IN CONST CHAR8 *NameString,
+ IN UINT64 Integer,
+ IN AML_NODE_HEADER *ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ AML_DATA_NODE *DataNode;
+ AML_OBJECT_NODE *IntNode;
+ CHAR8 *AmlNameString;
+ UINT32 AmlNameStringSize;
+ AML_OBJECT_NODE *ObjectNode;
+
+ DataNode = NULL;
+ IntNode = NULL;
+ ObjectNode = 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;
+ }
+
+ Status = AmlCodeGenInteger (Integer, &IntNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ // AmlCodeGenReturn() deletes DataNode if error.
+ Status = AmlCodeGenReturn (
+ (AML_NODE_HEADER *)DataNode,
+ ParentNode,
+ &ObjectNode
+ );
+
+ // DataNode is either deleted or added to ObjectNode, set to NULL so we don't
+ // delete it again
+ DataNode = NULL;
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)ObjectNode,
+ (AML_NODE_HANDLE)IntNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ if (NewObjectNode != 0) {
+ *NewObjectNode = ObjectNode;
+ }
+
+exit_handler:
+ if (AmlNameString != NULL) {
+ FreePool (AmlNameString);
+ }
+
+ if (IntNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
+ }
+
+ if (DataNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)DataNode);
+ }
+
+ if (ObjectNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)ObjectNode);
+ }
+
+ return Status;
+}
[SAMI] I think the error handling in the above function can be simplified as below:
...
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenReturnNameStringIntegerArgument (
IN CONST CHAR8 *NameString,
IN UINT64 Integer,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode
OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *DataNode;
AML_OBJECT_NODE *IntNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
AML_OBJECT_NODE *ObjectNode;
DataNode = NULL;
IntNode = NULL;
ObjectNode = 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 = AmlCodeGenInteger (Integer, &IntNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler1;
}
// AmlCodeGenReturn() deletes DataNode if error.
Status = AmlCodeGenReturn (
(AML_NODE_HEADER *)DataNode,
ParentNode,
&ObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler1;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)ObjectNode,
(AML_NODE_HANDLE)IntNode
);
if (EFI_ERROR (Status)) {
// ObjectNode is already attached to ParentNode in AmlCodeGenReturn(),
// so no need to free it here, it will be deleted when deleting the
// ParentNode tree
ASSERT (0);
goto exit_handler1;
}
if (NewObjectNode !=
0) {
*NewObjectNode = ObjectNode;
}
goto exit_handler;
exit_handler1:
if (IntNode !=
NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
}
exit_handler:
if (AmlNameString !=
NULL) {
FreePool (AmlNameString);
}
return Status;
}
Please let me know if you agree with this, and I will make this change before merging.
[/SAMI]
+
/** AML code generation for a method returning a NameString.
AmlCodeGenMethodRetNameString (
@@ -1989,6 +2121,118 @@ error_handler:
return Status;
}
+/** AML code generation for a method returning a NameString that takes an
+ integer argument.
+
+ AmlCodeGenMethodRetNameStringIntegerArgument (
+ "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
+ );
+ is equivalent of the following ASL code:
+ Method(MET0, 1, Serialized, 3) {
+ Return (MET1 (5))
+ }
+
+ 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] IntegerArgument Argument to pass 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
+AmlCodeGenMethodRetNameStringIntegerArgument (
+ IN CONST CHAR8 *MethodNameString,
+ IN CONST CHAR8 *ReturnedNameString OPTIONAL,
+ IN UINT8 NumArgs,
+ IN BOOLEAN IsSerialized,
+ IN UINT8 SyncLevel,
+ IN UINT64 IntegerArgument,
+ 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 = AmlCodeGenReturnNameStringIntegerArgument (
+ ReturnedNameString,
+ IntegerArgument,
+ (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 (
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I see you swapped the order of the functions, that looks good and avoids special handling for that case. That looks good to me.
Thanks,
Jeff
From: Sami Mujawar <Sami.Mujawar@arm.com>
Sent: Thursday, September 21, 2023 2:07 PM
To: Jeff Brasen <jbrasen@nvidia.com>; devel@edk2.groups.io
Cc: Pierre Gondois <Pierre.Gondois@arm.com>; Swatisri Kantamsetti <swatisrik@nvidia.com>; Ashish Singhal <ashishsingha@nvidia.com>; nd <nd@arm.com>
Subject: Re: [PATCH v4 2/4] DynamicTablesPkg: Add support for simple method invocation.
External email: Use caution opening links or attachments
Hi Jeff,
Yes, I recorded the integer node and data node creation.
Regards,
Sami Mujawar
________________________________
From: Jeff Brasen <jbrasen@nvidia.com<mailto:jbrasen@nvidia.com>>
Sent: 21 September 2023 18:38
To: Sami Mujawar <Sami.Mujawar@arm.com<mailto:Sami.Mujawar@arm.com>>; devel@edk2.groups.io<mailto:devel@edk2.groups.io> <devel@edk2.groups.io<mailto:devel@edk2.groups.io>>
Cc: Pierre Gondois <Pierre.Gondois@arm.com<mailto:Pierre.Gondois@arm.com>>; Swatisri Kantamsetti <swatisrik@nvidia.com<mailto:swatisrik@nvidia.com>>; Ashish Singhal <ashishsingha@nvidia.com<mailto:ashishsingha@nvidia.com>>; nd <nd@arm.com<mailto:nd@arm.com>>
Subject: RE: [PATCH v4 2/4] DynamicTablesPkg: Add support for simple method invocation.
Only thing I see is if AmlCodeGenInteger fails we don't delete DataNode right?
From: Sami Mujawar <sami.mujawar@arm.com<mailto:sami.mujawar@arm.com>>
Sent: Thursday, September 21, 2023 10:49 AM
To: Jeff Brasen <jbrasen@nvidia.com<mailto:jbrasen@nvidia.com>>; devel@edk2.groups.io<mailto:devel@edk2.groups.io>
Cc: pierre.gondois@arm.com<mailto:pierre.gondois@arm.com>; Swatisri Kantamsetti <swatisrik@nvidia.com<mailto:swatisrik@nvidia.com>>; Ashish Singhal <ashishsingha@nvidia.com<mailto:ashishsingha@nvidia.com>>; nd@arm.com<mailto:nd@arm.com>
Subject: Re: [PATCH v4 2/4] DynamicTablesPkg: Add support for simple method invocation.
External email: Use caution opening links or attachments
Hi Jeff,
Thank you for this patch.
Please see my response inline marked [SAMI].
Regards,
Sami Mujawar
On 18/09/2023 04:46 pm, Jeff Brasen wrote:
Add support to add Return objects via AML that pass a single integer
argument to the named method.
Signed-off-by: Jeff Brasen <jbrasen@nvidia.com><mailto:jbrasen@nvidia.com>
---
.../Include/Library/AmlLib/AmlLib.h | 54 ++++
.../Common/AmlLib/CodeGen/AmlCodeGen.c | 244 ++++++++++++++++++
2 files changed, 298 insertions(+)
diff --git a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
index d201ae9499..b82c7a3ce8 100644
--- a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
+++ b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
@@ -1194,6 +1194,60 @@ AmlCodeGenMethodRetInteger (
OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
);
+/** AML code generation for a method returning a NameString that takes an
+ integer argument.
+
+ AmlCodeGenMethodRetNameStringIntegerArgument (
+ "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
+ );
+ is equivalent of the following ASL code:
+ Method(MET0, 1, Serialized, 3) {
+ Return (MET1 (5))
+ }
+
+ 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] IntegerArgument Argument to pass 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
+AmlCodeGenMethodRetNameStringIntegerArgument (
+ IN CONST CHAR8 *MethodNameString,
+ IN CONST CHAR8 *ReturnedNameString OPTIONAL,
+ IN UINT8 NumArgs,
+ IN BOOLEAN IsSerialized,
+ IN UINT8 SyncLevel,
+ IN UINT64 IntegerArgument,
+ IN AML_NODE_HANDLE ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
+ );
+
/** Create a _LPI name.
AmlCreateLpiNode ("_LPI", 0, 1, ParentNode, &LpiNode) is
diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
index 88537b7e2d..ea519d1aa8 100644
--- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
+++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
@@ -1881,6 +1881,138 @@ AmlCodeGenReturnInteger (
return Status;
}
+/** AML code generation for a Return object node,
+ returning the object as an input NameString with a integer argument.
+
+ AmlCodeGenReturn ("NAM1", 6, ParentNode, NewObjectNode) is
+ equivalent of the following ASL code:
+ Return(NAM1 (6))
+
+ 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] Integer Argument to pass to the NameString
+ @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
+AmlCodeGenReturnNameStringIntegerArgument (
+ IN CONST CHAR8 *NameString,
+ IN UINT64 Integer,
+ IN AML_NODE_HEADER *ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ AML_DATA_NODE *DataNode;
+ AML_OBJECT_NODE *IntNode;
+ CHAR8 *AmlNameString;
+ UINT32 AmlNameStringSize;
+ AML_OBJECT_NODE *ObjectNode;
+
+ DataNode = NULL;
+ IntNode = NULL;
+ ObjectNode = 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;
+ }
+
+ Status = AmlCodeGenInteger (Integer, &IntNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ // AmlCodeGenReturn() deletes DataNode if error.
+ Status = AmlCodeGenReturn (
+ (AML_NODE_HEADER *)DataNode,
+ ParentNode,
+ &ObjectNode
+ );
+
+ // DataNode is either deleted or added to ObjectNode, set to NULL so we don't
+ // delete it again
+ DataNode = NULL;
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)ObjectNode,
+ (AML_NODE_HANDLE)IntNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ if (NewObjectNode != 0) {
+ *NewObjectNode = ObjectNode;
+ }
+
+exit_handler:
+ if (AmlNameString != NULL) {
+ FreePool (AmlNameString);
+ }
+
+ if (IntNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
+ }
+
+ if (DataNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)DataNode);
+ }
+
+ if (ObjectNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)ObjectNode);
+ }
+
+ return Status;
+}
[SAMI] I think the error handling in the above function can be simplified as below:
...
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenReturnNameStringIntegerArgument (
IN CONST CHAR8 *NameString,
IN UINT64 Integer,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode
OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *DataNode;
AML_OBJECT_NODE *IntNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
AML_OBJECT_NODE *ObjectNode;
DataNode = NULL;
IntNode = NULL;
ObjectNode = 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 = AmlCodeGenInteger (Integer, &IntNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler1;
}
// AmlCodeGenReturn() deletes DataNode if error.
Status = AmlCodeGenReturn (
(AML_NODE_HEADER *)DataNode,
ParentNode,
&ObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler1;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)ObjectNode,
(AML_NODE_HANDLE)IntNode
);
if (EFI_ERROR (Status)) {
// ObjectNode is already attached to ParentNode in AmlCodeGenReturn(),
// so no need to free it here, it will be deleted when deleting the
// ParentNode tree
ASSERT (0);
goto exit_handler1;
}
if (NewObjectNode !=
0) {
*NewObjectNode = ObjectNode;
}
goto exit_handler;
exit_handler1:
if (IntNode !=
NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
}
exit_handler:
if (AmlNameString !=
NULL) {
FreePool (AmlNameString);
}
return Status;
}
Please let me know if you agree with this, and I will make this change before merging.
[/SAMI]
+
/** AML code generation for a method returning a NameString.
AmlCodeGenMethodRetNameString (
@@ -1989,6 +2121,118 @@ error_handler:
return Status;
}
+/** AML code generation for a method returning a NameString that takes an
+ integer argument.
+
+ AmlCodeGenMethodRetNameStringIntegerArgument (
+ "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
+ );
+ is equivalent of the following ASL code:
+ Method(MET0, 1, Serialized, 3) {
+ Return (MET1 (5))
+ }
+
+ 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] IntegerArgument Argument to pass 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
+AmlCodeGenMethodRetNameStringIntegerArgument (
+ IN CONST CHAR8 *MethodNameString,
+ IN CONST CHAR8 *ReturnedNameString OPTIONAL,
+ IN UINT8 NumArgs,
+ IN BOOLEAN IsSerialized,
+ IN UINT8 SyncLevel,
+ IN UINT64 IntegerArgument,
+ 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 = AmlCodeGenReturnNameStringIntegerArgument (
+ ReturnedNameString,
+ IntegerArgument,
+ (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 (
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[AMD Official Use Only - General]
Hi Jeff, Sami,
I'm not reviewer, just providing the opinion.
How about making it generic(generic to integer argument) instead of single integer argument.
IN UINT64 IntegerArgument
IN UINT64 *IntegerArgumentArray.
Create the list(by making use of AmlVarListAddTail) of data object depends on IntergerArgument value.
Also, I think if data in data node is AML_ARG0(0x68), AML_ARG1...., then it will considered as Arg0, Arg1, ....etc.
Thanks
AbduL
From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Jeff Brasen via groups.io
Sent: Friday, September 22, 2023 2:19 AM
To: Sami Mujawar <Sami.Mujawar@arm.com>; devel@edk2.groups.io
Cc: Pierre Gondois <Pierre.Gondois@arm.com>; Swatisri Kantamsetti <swatisrik@nvidia.com>; Ashish Singhal <ashishsingha@nvidia.com>; nd <nd@arm.com>
Subject: Re: [edk2-devel] [PATCH v4 2/4] DynamicTablesPkg: Add support for simple method invocation.
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I see you swapped the order of the functions, that looks good and avoids special handling for that case. That looks good to me.
Thanks,
Jeff
From: Sami Mujawar <Sami.Mujawar@arm.com<mailto:Sami.Mujawar@arm.com>>
Sent: Thursday, September 21, 2023 2:07 PM
To: Jeff Brasen <jbrasen@nvidia.com<mailto:jbrasen@nvidia.com>>; devel@edk2.groups.io<mailto:devel@edk2.groups.io>
Cc: Pierre Gondois <Pierre.Gondois@arm.com<mailto:Pierre.Gondois@arm.com>>; Swatisri Kantamsetti <swatisrik@nvidia.com<mailto:swatisrik@nvidia.com>>; Ashish Singhal <ashishsingha@nvidia.com<mailto:ashishsingha@nvidia.com>>; nd <nd@arm.com<mailto:nd@arm.com>>
Subject: Re: [PATCH v4 2/4] DynamicTablesPkg: Add support for simple method invocation.
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Hi Jeff,
Yes, I recorded the integer node and data node creation.
Regards,
Sami Mujawar
________________________________
From: Jeff Brasen <jbrasen@nvidia.com<mailto:jbrasen@nvidia.com>>
Sent: 21 September 2023 18:38
To: Sami Mujawar <Sami.Mujawar@arm.com<mailto:Sami.Mujawar@arm.com>>; devel@edk2.groups.io<mailto:devel@edk2.groups.io> <devel@edk2.groups.io<mailto:devel@edk2.groups.io>>
Cc: Pierre Gondois <Pierre.Gondois@arm.com<mailto:Pierre.Gondois@arm.com>>; Swatisri Kantamsetti <swatisrik@nvidia.com<mailto:swatisrik@nvidia.com>>; Ashish Singhal <ashishsingha@nvidia.com<mailto:ashishsingha@nvidia.com>>; nd <nd@arm.com<mailto:nd@arm.com>>
Subject: RE: [PATCH v4 2/4] DynamicTablesPkg: Add support for simple method invocation.
Only thing I see is if AmlCodeGenInteger fails we don't delete DataNode right?
From: Sami Mujawar <sami.mujawar@arm.com<mailto:sami.mujawar@arm.com>>
Sent: Thursday, September 21, 2023 10:49 AM
To: Jeff Brasen <jbrasen@nvidia.com<mailto:jbrasen@nvidia.com>>; devel@edk2.groups.io<mailto:devel@edk2.groups.io>
Cc: pierre.gondois@arm.com<mailto:pierre.gondois@arm.com>; Swatisri Kantamsetti <swatisrik@nvidia.com<mailto:swatisrik@nvidia.com>>; Ashish Singhal <ashishsingha@nvidia.com<mailto:ashishsingha@nvidia.com>>; nd@arm.com<mailto:nd@arm.com>
Subject: Re: [PATCH v4 2/4] DynamicTablesPkg: Add support for simple method invocation.
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Hi Jeff,
Thank you for this patch.
Please see my response inline marked [SAMI].
Regards,
Sami Mujawar
On 18/09/2023 04:46 pm, Jeff Brasen wrote:
Add support to add Return objects via AML that pass a single integer
argument to the named method.
Signed-off-by: Jeff Brasen <jbrasen@nvidia.com><mailto:jbrasen@nvidia.com>
---
.../Include/Library/AmlLib/AmlLib.h | 54 ++++
.../Common/AmlLib/CodeGen/AmlCodeGen.c | 244 ++++++++++++++++++
2 files changed, 298 insertions(+)
diff --git a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
index d201ae9499..b82c7a3ce8 100644
--- a/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
+++ b/DynamicTablesPkg/Include/Library/AmlLib/AmlLib.h
@@ -1194,6 +1194,60 @@ AmlCodeGenMethodRetInteger (
OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
);
+/** AML code generation for a method returning a NameString that takes an
+ integer argument.
+
+ AmlCodeGenMethodRetNameStringIntegerArgument (
+ "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
+ );
+ is equivalent of the following ASL code:
+ Method(MET0, 1, Serialized, 3) {
+ Return (MET1 (5))
+ }
+
+ 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] IntegerArgument Argument to pass 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
+AmlCodeGenMethodRetNameStringIntegerArgument (
+ IN CONST CHAR8 *MethodNameString,
+ IN CONST CHAR8 *ReturnedNameString OPTIONAL,
+ IN UINT8 NumArgs,
+ IN BOOLEAN IsSerialized,
+ IN UINT8 SyncLevel,
+ IN UINT64 IntegerArgument,
+ IN AML_NODE_HANDLE ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE_HANDLE *NewObjectNode OPTIONAL
+ );
+
/** Create a _LPI name.
AmlCreateLpiNode ("_LPI", 0, 1, ParentNode, &LpiNode) is
diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
index 88537b7e2d..ea519d1aa8 100644
--- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
+++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
@@ -1881,6 +1881,138 @@ AmlCodeGenReturnInteger (
return Status;
}
+/** AML code generation for a Return object node,
+ returning the object as an input NameString with a integer argument.
+
+ AmlCodeGenReturn ("NAM1", 6, ParentNode, NewObjectNode) is
+ equivalent of the following ASL code:
+ Return(NAM1 (6))
+
+ 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] Integer Argument to pass to the NameString
+ @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
+AmlCodeGenReturnNameStringIntegerArgument (
+ IN CONST CHAR8 *NameString,
+ IN UINT64 Integer,
+ IN AML_NODE_HEADER *ParentNode OPTIONAL,
+ OUT AML_OBJECT_NODE **NewObjectNode OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ AML_DATA_NODE *DataNode;
+ AML_OBJECT_NODE *IntNode;
+ CHAR8 *AmlNameString;
+ UINT32 AmlNameStringSize;
+ AML_OBJECT_NODE *ObjectNode;
+
+ DataNode = NULL;
+ IntNode = NULL;
+ ObjectNode = 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;
+ }
+
+ Status = AmlCodeGenInteger (Integer, &IntNode);
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ // AmlCodeGenReturn() deletes DataNode if error.
+ Status = AmlCodeGenReturn (
+ (AML_NODE_HEADER *)DataNode,
+ ParentNode,
+ &ObjectNode
+ );
+
+ // DataNode is either deleted or added to ObjectNode, set to NULL so we don't
+ // delete it again
+ DataNode = NULL;
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ Status = AmlVarListAddTail (
+ (AML_NODE_HANDLE)ObjectNode,
+ (AML_NODE_HANDLE)IntNode
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (0);
+ goto exit_handler;
+ }
+
+ if (NewObjectNode != 0) {
+ *NewObjectNode = ObjectNode;
+ }
+
+exit_handler:
+ if (AmlNameString != NULL) {
+ FreePool (AmlNameString);
+ }
+
+ if (IntNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
+ }
+
+ if (DataNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)DataNode);
+ }
+
+ if (ObjectNode != NULL) {
+ AmlDeleteTree ((AML_NODE_HANDLE)ObjectNode);
+ }
+
+ return Status;
+}
[SAMI] I think the error handling in the above function can be simplified as below:
...
STATIC
EFI_STATUS
EFIAPI
AmlCodeGenReturnNameStringIntegerArgument (
IN CONST CHAR8 *NameString,
IN UINT64 Integer,
IN AML_NODE_HEADER *ParentNode OPTIONAL,
OUT AML_OBJECT_NODE **NewObjectNode
OPTIONAL
)
{
EFI_STATUS Status;
AML_DATA_NODE *DataNode;
AML_OBJECT_NODE *IntNode;
CHAR8 *AmlNameString;
UINT32 AmlNameStringSize;
AML_OBJECT_NODE *ObjectNode;
DataNode = NULL;
IntNode = NULL;
ObjectNode = 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 = AmlCodeGenInteger (Integer, &IntNode);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler;
}
Status = AmlCreateDataNode (
EAmlNodeDataTypeNameString,
(UINT8 *)AmlNameString,
AmlNameStringSize,
&DataNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler1;
}
// AmlCodeGenReturn() deletes DataNode if error.
Status = AmlCodeGenReturn (
(AML_NODE_HEADER *)DataNode,
ParentNode,
&ObjectNode
);
if (EFI_ERROR (Status)) {
ASSERT (0);
goto exit_handler1;
}
Status = AmlVarListAddTail (
(AML_NODE_HANDLE)ObjectNode,
(AML_NODE_HANDLE)IntNode
);
if (EFI_ERROR (Status)) {
// ObjectNode is already attached to ParentNode in AmlCodeGenReturn(),
// so no need to free it here, it will be deleted when deleting the
// ParentNode tree
ASSERT (0);
goto exit_handler1;
}
if (NewObjectNode !=
0) {
*NewObjectNode = ObjectNode;
}
goto exit_handler;
exit_handler1:
if (IntNode !=
NULL) {
AmlDeleteTree ((AML_NODE_HANDLE)IntNode);
}
exit_handler:
if (AmlNameString !=
NULL) {
FreePool (AmlNameString);
}
return Status;
}
Please let me know if you agree with this, and I will make this change before merging.
[/SAMI]
+
/** AML code generation for a method returning a NameString.
AmlCodeGenMethodRetNameString (
@@ -1989,6 +2121,118 @@ error_handler:
return Status;
}
+/** AML code generation for a method returning a NameString that takes an
+ integer argument.
+
+ AmlCodeGenMethodRetNameStringIntegerArgument (
+ "MET0", "MET1", 1, TRUE, 3, 5, ParentNode, NewObjectNode
+ );
+ is equivalent of the following ASL code:
+ Method(MET0, 1, Serialized, 3) {
+ Return (MET1 (5))
+ }
+
+ 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] IntegerArgument Argument to pass 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
+AmlCodeGenMethodRetNameStringIntegerArgument (
+ IN CONST CHAR8 *MethodNameString,
+ IN CONST CHAR8 *ReturnedNameString OPTIONAL,
+ IN UINT8 NumArgs,
+ IN BOOLEAN IsSerialized,
+ IN UINT8 SyncLevel,
+ IN UINT64 IntegerArgument,
+ 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 = AmlCodeGenReturnNameStringIntegerArgument (
+ ReturnedNameString,
+ IntegerArgument,
+ (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 (
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Hello Abdul,
On 9/23/23 06:22, Attar, AbdulLateef (Abdul Lateef) wrote:
> [AMD Official Use Only - General]
>
>
> Hi Jeff, Sami,
>
> I’m not reviewer, just providing the opinion.
>
> How about making it generic(generic to integer argument) instead of single integer argument.
>
> IN UINT64 IntegerArgument
>
> IN UINT64 **IntegerArgumentArray.*
>
> Create the list(by making use of AmlVarListAddTail) of data object depends on IntergerArgument value.
>
> Also, I think if data in data node is AML_ARG0(0x68), AML_ARG1…., then it will considered as Arg0, Arg1, ….etc.
Just to be sure, you would like the method generated by AmlCodeGenMethodRetNameStringIntegerArgument()
to take multiple integer argument ? This would allow to generate a function taking N input arguments like:
Method(MET0, N, Serialized, 3) {
Return (MET1 (1, 2, ..., N))
}
It is true AmlCodeGenMethodRetNameStringIntegerArgument() takes a NumArgs parameter,
but currently NumArgs can only equal 1.
Is there a specific use case that you are looking to solve with this solution ?
Regards,
Pierre
>
> Thanks
>
> AbduL
>
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