From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mx.groups.io with SMTP id smtpd.web10.6277.1624448498840992760 for ; Wed, 23 Jun 2021 04:41:39 -0700 Authentication-Results: mx.groups.io; dkim=missing; spf=pass (domain: arm.com, ip: 217.140.110.172, mailfrom: pierre.gondois@arm.com) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5E82C31B; Wed, 23 Jun 2021 04:41:38 -0700 (PDT) Received: from e120189.arm.com (unknown [10.57.78.245]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 24E823F719; Wed, 23 Jun 2021 04:41:37 -0700 (PDT) From: "PierreGondois" To: devel@edk2.groups.io, Sami Mujawar , Alexei Fedorov Cc: Akanksha Jain , Alexandru Elisei Subject: [PATCH v1 04/13] DynamicTablesPkg: AML code generation for a Package Date: Wed, 23 Jun 2021 12:40:29 +0100 Message-Id: <20210623114039.24491-5-Pierre.Gondois@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210623114039.24491-1-Pierre.Gondois@arm.com> References: <20210623114039.24491-1-Pierre.Gondois@arm.com> From: Pierre Gondois Add AmlCodeGenPackage() to generate AML code for declaring a Package() object. This function generates an empty package node. New elements can then be added to the package's variable argument list. Signed-off-by: Pierre Gondois --- .../Common/AmlLib/CodeGen/AmlCodeGen.c | 82 ++++++++++++++++++- 1 file changed, 81 insertions(+), 1 deletion(-) diff --git a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c index 5d310f201319..ea9b73b464a4 100644 --- a/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c +++ b/DynamicTablesPkg/Library/Common/AmlLib/CodeGen/AmlCodeGen.c @@ -1,7 +1,7 @@ /** @file AML Code Generation. - Copyright (c) 2020, Arm Limited. All rights reserved.
+ Copyright (c) 2020 - 2021, Arm Limited. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent **/ @@ -235,6 +235,86 @@ AmlCodeGenInteger ( 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; + } + + DataNode = NULL; + 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 Name object node. @param [in] NameString The new variable name. -- 2.17.1