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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Oct 2021 13:28:30.9364 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 99cc61fa-6182-40ec-2f7e-08d98a5f851d X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB5EUR03FT034.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: GV1PR08MB7377 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Content-Language: en-GB Hi Pierre, Thanks you for this patch. Reviewed-by: Sami Mujawar Regards, Sami Mujawar On 07/10/2021 04:32 PM, Pierre.Gondois@arm.com wrote: > From: Pierre Gondois > > Add AmlCodeGenReturnNameString() to generate AML code for a > Return object node, returning the object as a NameString. > > AmlCodeGenReturn ("NAM1", ParentNode, NewObjectNode) is > equivalent of the following ASL code: > Return(NAM1) > > Signed-off-by: Pierre Gondois > --- > .../Common/AmlLib/CodeGen/AmlCodeGen.c | 181 ++++++++++++++++++ > 1 file changed, 181 insertions(+) > > diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c = b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c > index dd519bc67007..93d4ba79e937 100644 > --- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c > +++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c > @@ -1154,3 +1154,184 @@ error_handler1: > } > 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 :=3D ReturnOp ArgObject > + ReturnOp :=3D 0xA4 > + ArgObject :=3D TermArg =3D> 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 stat= ement. > + 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 =3D=3D NULL) || > + ((ParentNode =3D=3D NULL) && (NewObjectNode =3D=3D NULL)) || > + ((ParentNode !=3D NULL) && > + !AmlNodeCompareOpCode ( > + (AML_OBJECT_NODE*)ParentNode, AML_METHOD_OP, 0))) { > + ASSERT (0); > + return EFI_INVALID_PARAMETER; > + } > + > + Status =3D AmlCreateObjectNode ( > + AmlGetByteEncodingByOpCode (AML_RETURN_OP, 0), > + 0, > + &ObjectNode > + ); > + if (EFI_ERROR (Status)) { > + ASSERT (0); > + goto error_handler; > + } > + > + Status =3D AmlSetFixedArgument ( > + ObjectNode, > + EAmlParseIndexTerm0, > + (AML_NODE_HEADER*)ReturnNode > + ); > + if (EFI_ERROR (Status)) { > + ASSERT (0); > + goto error_handler; > + } > + > + ReturnNode =3D NULL; > + > + Status =3D LinkNode ( > + ObjectNode, > + ParentNode, > + NewObjectNode > + ); > + if (EFI_ERROR (Status)) { > + ASSERT (0); > + goto error_handler; > + } > + > + return Status; > + > +error_handler: > + if (ReturnNode !=3D NULL) { > + AmlDeleteTree (ReturnNode); > + } > + if (ObjectNode !=3D 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 :=3D ReturnOp ArgObject > + ReturnOp :=3D 0xA4 > + ArgObject :=3D TermArg =3D> 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 =3D NULL; > + > + Status =3D ConvertAslNameToAmlName (NameString, &AmlNameString); > + if (EFI_ERROR (Status)) { > + ASSERT (0); > + return Status; > + } > + > + Status =3D AmlGetNameStringSize (AmlNameString, &AmlNameStringSize); > + if (EFI_ERROR (Status)) { > + ASSERT (0); > + goto exit_handler; > + } > + > + Status =3D AmlCreateDataNode ( > + EAmlNodeDataTypeNameString, > + (UINT8*)AmlNameString, > + AmlNameStringSize, > + &DataNode > + ); > + if (EFI_ERROR (Status)) { > + ASSERT (0); > + goto exit_handler; > + } > + > + // AmlCodeGenReturn() deletes DataNode if error. > + Status =3D AmlCodeGenReturn ( > + (AML_NODE_HEADER*)DataNode, > + ParentNode, > + NewObjectNode > + ); > + ASSERT_EFI_ERROR (Status); > + > +exit_handler: > + if (AmlNameString !=3D NULL) { > + FreePool (AmlNameString); > + } > + return Status; > +} IMPORTANT NOTICE: The contents of this email and any attachments are confid= ential and may also be privileged. If you are not the intended recipient, p= lease notify the sender immediately and do not disclose the contents to any= other person, use it for any purpose, or store or copy the information in = any medium. Thank you.