From: "Sami Mujawar" <sami.mujawar@arm.com>
To: Pierre.Gondois@arm.com, devel@edk2.groups.io,
Alexei Fedorov <Alexei.Fedorov@arm.com>
Cc: Akanksha Jain <akanksha.jain2@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>, nd <nd@arm.com>
Subject: Re: [PATCH v1 07/13] DynamicTablesPkg: AML code generation for a Method
Date: Fri, 1 Oct 2021 15:52:04 +0100 [thread overview]
Message-ID: <10607405-84aa-d322-b0cd-7f4ee3c6f51f@arm.com> (raw)
In-Reply-To: <20210623114039.24491-8-Pierre.Gondois@arm.com>
Hi Pierre,
I have a minor suggestion marked inline as [SAMI].
Otherwise this patch looks good to me.
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
Regards,
Sami Mujawar
On 23/06/2021 12:40 PM, Pierre.Gondois@arm.com wrote:
> From: Pierre Gondois <Pierre.Gondois@arm.com>
>
> Add AmlCodeGenMethod() to generate code for a control method.
>
> AmlCodeGenMethod ("MET0", 1, TRUE, 3, ParentNode, NewObjectNode)
> is equivalent of the following ASL code:
> Method(MET0, 1, Serialized, 3) {}
>
> Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
> ---
> .../Common/AmlLib/CodeGen/AmlCodeGen.c | 166 ++++++++++++++++++
> 1 file changed, 166 insertions(+)
>
> diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
> index faf7902c1f21..32665f7f8d8f 100644
> --- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
> +++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c
> @@ -971,3 +971,169 @@ error_handler1:
>
> 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) {}
> +
> + 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;
> +
> + 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;
> + }
> +
> + // Compute the size to write in the PkgLen.
> + // Add 1 byte (ByteData) for MethodFlags.
[SAMI] Is it possible to add description of the encoding for MethodOp,
please? Also it will help if some comments are added describing each
encoding step using a numberd list.
> + Status = AmlComputePkgLength (AmlNameStringSize + 1, &PkgLen);
> + if (EFI_ERROR (Status)) {
> + ASSERT (0);
> + goto error_handler1;
> + }
> +
> + 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;
> + }
> +
> + Status = AmlSetFixedArgument (
> + ObjectNode,
> + EAmlParseIndexTerm0,
> + (AML_NODE_HEADER*)DataNode
> + );
> + if (EFI_ERROR (Status)) {
> + ASSERT (0);
> + goto error_handler2;
> + }
> +
> + DataNode = NULL;
> +
> + 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().
[SAMI] You could mention the encoding step here.
> + 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;
> +}
next prev parent reply other threads:[~2021-10-01 14:52 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-23 11:40 [PATCH v1 00/13] Create a SSDT CPU topology generator PierreGondois
2021-06-23 11:40 ` [PATCH v1 01/13] DynamicTablesPkg: Make AmlNodeGetIntegerValue public PierreGondois
2021-10-01 14:48 ` Sami Mujawar
2021-06-23 11:40 ` [PATCH v1 02/13] DynamicTablesPkg: AML Code generation for Register() PierreGondois
2021-10-01 12:25 ` Sami Mujawar
2021-06-23 11:40 ` [PATCH v1 03/13] DynamicTablesPkg: AML Code generation for Resource data EndTag PierreGondois
2021-10-01 12:48 ` Sami Mujawar
2021-06-23 11:40 ` [PATCH v1 04/13] DynamicTablesPkg: AML code generation for a Package PierreGondois
2021-10-01 12:55 ` Sami Mujawar
2021-06-23 11:40 ` [PATCH v1 05/13] DynamicTablesPkg: Helper function to compute package length PierreGondois
2021-10-01 14:24 ` Sami Mujawar
2021-06-23 11:40 ` [PATCH v1 06/13] DynamicTablesPkg: AML code generation for a ResourceTemplate PierreGondois
2021-10-01 14:34 ` Sami Mujawar
2021-06-23 11:40 ` [PATCH v1 07/13] DynamicTablesPkg: AML code generation for a Method PierreGondois
2021-10-01 14:52 ` Sami Mujawar [this message]
2021-06-23 11:40 ` [PATCH v1 08/13] DynamicTablesPkg: AML code generation to Return a NameString PierreGondois
2021-10-01 15:13 ` Sami Mujawar
2021-06-23 11:40 ` [PATCH v1 09/13] DynamicTablesPkg: AML code generation for a Method returning a NS PierreGondois
2021-10-01 15:23 ` Sami Mujawar
2021-10-06 13:33 ` PierreGondois
2021-06-23 11:40 ` [PATCH v1 09/13] DynamicTablesPkg: AML code generation to create " PierreGondois
2021-06-23 11:45 ` [edk2-devel] " PierreGondois
2021-06-23 11:40 ` [PATCH v1 10/13] DynamicTablesPkg: AML code generation for a _LPI object PierreGondois
2021-10-01 15:31 ` Sami Mujawar
2021-06-23 11:40 ` [PATCH v1 11/13] DynamicTablesPkg: AML code generation to add an _LPI state PierreGondois
2021-10-01 15:43 ` Sami Mujawar
2021-06-23 11:40 ` [PATCH v1 12/13] DynamicTablesPkg: Add CM_ARM_LPI_INFO object PierreGondois
2021-10-05 14:39 ` Sami Mujawar
2021-06-23 11:40 ` [PATCH v1 13/13] DynamicTablesPkg: SSDT CPU topology and LPI state generator PierreGondois
2021-10-05 14:38 ` Sami Mujawar
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