613 lines
16 KiB
C
613 lines
16 KiB
C
/** @file
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ACPI Sdt Protocol Driver
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Copyright (c) 2010, Intel Corporation. All rights reserved. <BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "AcpiTable.h"
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/**
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Construct node list according to the AML handle.
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@param[in] AmlHandle AML handle.
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@param[in] AmlRootNodeList AML root node list.
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@param[in] AmlParentNodeList AML parent node list.
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@retval EFI_SUCCESS Success.
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@retval EFI_INVALID_PARAMETER AML handle does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlConstructNodeList (
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IN EFI_AML_HANDLE *AmlHandle,
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IN EFI_AML_NODE_LIST *AmlRootNodeList,
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IN EFI_AML_NODE_LIST *AmlParentNodeList
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);
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/**
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Create AML Node.
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@param[in] NameSeg AML NameSeg.
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@param[in] Parent AML parent node list.
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@param[in] AmlByteEncoding AML Byte Encoding.
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@return AML Node.
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**/
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EFI_AML_NODE_LIST *
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AmlCreateNode (
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IN UINT8 *NameSeg,
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IN EFI_AML_NODE_LIST *Parent,
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IN AML_BYTE_ENCODING *AmlByteEncoding
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)
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{
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EFI_AML_NODE_LIST *AmlNodeList;
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AmlNodeList = AllocatePool (sizeof(*AmlNodeList));
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// ASSERT (AmlNodeList != NULL);
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AmlNodeList->Signature = EFI_AML_NODE_LIST_SIGNATURE;
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CopyMem(AmlNodeList->Name, NameSeg, AML_NAME_SEG_SIZE);
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AmlNodeList->Buffer = NULL;
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AmlNodeList->Size = 0;
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InitializeListHead (&AmlNodeList->Link);
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InitializeListHead (&AmlNodeList->Children);
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AmlNodeList->Parent = Parent;
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AmlNodeList->AmlByteEncoding = AmlByteEncoding;
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return AmlNodeList;
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}
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/**
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Find the AML NameSeg in the children of AmlParentNodeList.
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@param[in] NameSeg AML NameSeg.
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@param[in] AmlParentNodeList AML parent node list.
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@param[in] Create TRUE means to create node if not found.
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@return AmlChildNode whoes name is same as NameSeg.
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**/
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EFI_AML_NODE_LIST *
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AmlFindNodeInThis (
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IN UINT8 *NameSeg,
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IN EFI_AML_NODE_LIST *AmlParentNodeList,
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IN BOOLEAN Create
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)
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{
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EFI_AML_NODE_LIST *CurrentAmlNodeList;
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LIST_ENTRY *CurrentLink;
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LIST_ENTRY *StartLink;
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EFI_AML_NODE_LIST *AmlNodeList;
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StartLink = &AmlParentNodeList->Children;
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CurrentLink = StartLink->ForwardLink;
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while (CurrentLink != StartLink) {
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CurrentAmlNodeList = EFI_AML_NODE_LIST_FROM_LINK (CurrentLink);
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//
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// AML name is same as the one stored
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//
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if (CompareMem (CurrentAmlNodeList->Name, NameSeg, AML_NAME_SEG_SIZE) == 0) {
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//
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// Good! Found it
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//
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return CurrentAmlNodeList;
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}
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CurrentLink = CurrentLink->ForwardLink;
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}
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//
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// Not found
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//
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if (!Create) {
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return NULL;
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}
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//
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// Create new node with NULL buffer - it means namespace not be returned.
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//
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AmlNodeList = AmlCreateNode (NameSeg, AmlParentNodeList, NULL);
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InsertTailList (&AmlParentNodeList->Children, &AmlNodeList->Link);
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return AmlNodeList;
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}
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/**
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Find the AML NameString in the children of AmlParentNodeList or AmlRootNodeList.
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@param[in] NameString AML NameString.
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@param[in] AmlRootNodeList AML root node list.
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@param[in] AmlParentNodeList AML parent node list.
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@param[in] Create TRUE means to create node if not found.
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@return AmlChildNode whoes name is same as NameSeg.
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**/
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EFI_AML_NODE_LIST *
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AmlFindNodeInTheTree (
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IN UINT8 *NameString,
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IN EFI_AML_NODE_LIST *AmlRootNodeList,
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IN EFI_AML_NODE_LIST *AmlParentNodeList,
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IN BOOLEAN Create
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)
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{
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UINT8 *Buffer;
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EFI_AML_NODE_LIST *AmlNodeList;
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EFI_AML_NODE_LIST *AmlCurrentNodeList;
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UINT8 Index;
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UINT8 SegCount;
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Buffer = NameString;
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//
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// Handle root or parent prefix
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//
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if (*Buffer == AML_ROOT_CHAR) {
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AmlCurrentNodeList = AmlRootNodeList;
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Buffer += 1;
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} else if (*Buffer == AML_PARENT_PREFIX_CHAR) {
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AmlCurrentNodeList = AmlParentNodeList;
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do {
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if (AmlCurrentNodeList->Parent != NULL) {
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AmlCurrentNodeList = AmlCurrentNodeList->Parent;
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} else {
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//
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// Only root has no parent
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//
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// ASSERT (AmlCurrentNodeList == AmlRootNodeList);
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}
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Buffer += 1;
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} while (*Buffer == AML_PARENT_PREFIX_CHAR);
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} else {
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AmlCurrentNodeList = AmlParentNodeList;
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}
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//
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// Handle name segment
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//
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if (*Buffer == AML_DUAL_NAME_PREFIX) {
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Buffer += 1;
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SegCount = 2;
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} else if (*Buffer == AML_MULTI_NAME_PREFIX) {
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Buffer += 1;
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SegCount = *Buffer;
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Buffer += 1;
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} else if (*Buffer == 0) {
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//
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// NULL name, only for Root
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//
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// ASSERT (AmlCurrentNodeList == AmlRootNodeList);
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return AmlCurrentNodeList;
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} else {
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SegCount = 1;
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}
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//
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// Handle NamePath
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//
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Index = 0;
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do {
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AmlNodeList = AmlFindNodeInThis (Buffer, AmlCurrentNodeList, Create);
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if (AmlNodeList == NULL) {
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return NULL;
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}
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AmlCurrentNodeList = AmlNodeList;
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Buffer += AML_NAME_SEG_SIZE;
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Index ++;
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} while (Index < SegCount);
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return AmlNodeList;
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}
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/**
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Insert the NameString to the AmlNodeList.
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@param[in] NameString AML NameString.
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@param[in] Buffer Buffer for the Node.
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@param[in] Size Size for the Node.
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@param[in] AmlRootNodeList AML root node list.
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@param[in] AmlParentNodeList AML parent node list.
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@return AmlChildNode whoes name is NameString.
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**/
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EFI_AML_NODE_LIST *
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AmlInsertNodeToTree (
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IN UINT8 *NameString,
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IN VOID *Buffer,
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IN UINTN Size,
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IN EFI_AML_NODE_LIST *AmlRootNodeList,
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IN EFI_AML_NODE_LIST *AmlParentNodeList
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)
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{
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EFI_AML_NODE_LIST *AmlNodeList;
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AmlNodeList = AmlFindNodeInTheTree (
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NameString,
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AmlRootNodeList,
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AmlParentNodeList,
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TRUE // Find and Create
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);
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// ASSERT (AmlNodeList != NULL);
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if (AmlNodeList == NULL) {
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return NULL;
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}
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//
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// Check buffer
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//
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if (AmlNodeList->Buffer == NULL) {
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//
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// NULL means new added one or SCOPE_OP
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//
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if (*(UINT8 *)Buffer != AML_SCOPE_OP) {
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//
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// We need check if new one is SCOPE_OP, because SCOPE_OP just means namespace, not a real device.
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// We should not return SCOPE_OP.
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//
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AmlNodeList->Buffer = Buffer;
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AmlNodeList->Size = Size;
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AmlNodeList->AmlByteEncoding = AmlSearchByOpByte (Buffer);
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}
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return AmlNodeList;
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}
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//
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// Already added
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//
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if (*(UINT8 *)Buffer == AML_SCOPE_OP) {
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//
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// The new one is SCOPE_OP, OK just return;
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//
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return AmlNodeList;
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}
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//
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// Oops!!!, There must be something wrong.
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//
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DEBUG ((EFI_D_ERROR, "AML: Override Happen - %a!\n", NameString));
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DEBUG ((EFI_D_ERROR, "AML: Existing Node - %x\n", AmlNodeList->Buffer));
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DEBUG ((EFI_D_ERROR, "AML: New Buffer - %x\n", Buffer));
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return NULL;
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}
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/**
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Construct child node list according to the AML handle.
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@param[in] AmlHandle AML handle.
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@param[in] AmlRootNodeList AML root node list.
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@param[in] AmlParentNodeList AML parent node list.
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@retval EFI_SUCCESS Success.
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@retval EFI_INVALID_PARAMETER AML handle does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlConstructNodeListForChild (
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IN EFI_AML_HANDLE *AmlHandle,
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IN EFI_AML_NODE_LIST *AmlRootNodeList,
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IN EFI_AML_NODE_LIST *AmlParentNodeList
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)
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{
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AML_BYTE_ENCODING *AmlByteEncoding;
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UINT8 *Buffer;
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UINTN BufferSize;
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UINT8 *CurrentBuffer;
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EFI_AML_HANDLE *AmlChildHandle;
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EFI_STATUS Status;
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AmlByteEncoding = AmlHandle->AmlByteEncoding;
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Buffer = AmlHandle->Buffer;
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BufferSize = AmlHandle->Size;
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//
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// Check if we need recursively add node
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//
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if ((AmlByteEncoding->Attribute & AML_HAS_CHILD_OBJ) == 0) {
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//
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// No more node need to be added
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//
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return EFI_SUCCESS;
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}
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//
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// Do we need add node within METHOD?
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// Yes, just add Object is OK. But we need filter NameString for METHOD invoke.
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//
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//
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// Now, we get the last node.
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//
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Status = AmlGetOffsetAfterLastOption (AmlHandle, &CurrentBuffer);
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if (EFI_ERROR(Status)) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Go through all the reset buffer.
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//
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while ((UINTN)CurrentBuffer < (UINTN)Buffer + BufferSize) {
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//
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// Find the child node.
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//
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Status = SdtOpenEx (CurrentBuffer, (UINTN)Buffer + BufferSize - (UINTN)CurrentBuffer, (EFI_ACPI_HANDLE *)&AmlChildHandle);
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if (EFI_ERROR(Status)) {
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//
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// No child found, break now.
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//
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break;
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}
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//
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// Good, find the child. Construct node recursively
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//
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Status = AmlConstructNodeList (
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AmlChildHandle,
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AmlRootNodeList,
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AmlParentNodeList
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);
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if (EFI_ERROR(Status)) {
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break;
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}
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//
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// Parse next one
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//
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CurrentBuffer += AmlChildHandle->Size;
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Close ((EFI_ACPI_HANDLE)AmlChildHandle);
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}
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return EFI_SUCCESS;
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}
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/**
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Construct node list according to the AML handle.
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@param[in] AmlHandle AML handle.
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@param[in] AmlRootNodeList AML root node list.
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@param[in] AmlParentNodeList AML parent node list.
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@retval EFI_SUCCESS Success.
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@retval EFI_INVALID_PARAMETER AML handle does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlConstructNodeList (
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IN EFI_AML_HANDLE *AmlHandle,
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IN EFI_AML_NODE_LIST *AmlRootNodeList,
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IN EFI_AML_NODE_LIST *AmlParentNodeList
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)
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{
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VOID *NameString;
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EFI_AML_NODE_LIST *AmlNodeList;
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//
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// 1. Check if there is need to construct node for this OpCode.
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//
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if ((AmlHandle->AmlByteEncoding->Attribute & AML_IN_NAMESPACE) == 0) {
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//
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// No need to construct node, so we just skip this OpCode.
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//
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return EFI_SUCCESS;
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}
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//
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// 2. Now, we need construct node for this OpCode.
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//
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NameString = AmlGetObjectName (AmlHandle);
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if (NameString == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Now, we need to insert node to the node list.
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// NOTE: The name here could be AML NameString. So the callee need parse it.
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//
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AmlNodeList = AmlInsertNodeToTree (NameString, AmlHandle->Buffer, AmlHandle->Size, AmlRootNodeList, AmlParentNodeList);
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// ASSERT (AmlNodeList != NULL);
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//
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// 3. Ok, we need to parse the object list to see if there are more node to be added.
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//
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return AmlConstructNodeListForChild (AmlHandle, AmlRootNodeList, AmlNodeList);
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}
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/**
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Destruct node list
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@param[in] AmlParentNodeList AML parent node list.
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**/
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VOID
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AmlDestructNodeList (
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IN EFI_AML_NODE_LIST *AmlParentNodeList
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)
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{
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EFI_AML_NODE_LIST *CurrentAmlNodeList;
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LIST_ENTRY *CurrentLink;
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LIST_ENTRY *StartLink;
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//
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// Get the children link
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//
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StartLink = &AmlParentNodeList->Children;
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CurrentLink = StartLink->ForwardLink;
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//
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// Go through all the children
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//
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while (CurrentLink != StartLink) {
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//
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// Destruct the child's list recursively
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//
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CurrentAmlNodeList = EFI_AML_NODE_LIST_FROM_LINK (CurrentLink);
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CurrentLink = CurrentLink->ForwardLink;
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//
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// Remove this child from list and free the node
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//
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RemoveEntryList (&(CurrentAmlNodeList->Link));
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AmlDestructNodeList (CurrentAmlNodeList);
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}
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//
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// Done.
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//
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FreePool(AmlParentNodeList);
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return ;
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}
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/**
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Dump node list
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@param[in] AmlParentNodeList AML parent node list.
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@param[in] Level Output debug level.
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**/
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VOID
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AmlDumpNodeInfo (
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IN EFI_AML_NODE_LIST *AmlParentNodeList,
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IN UINTN Level
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)
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{
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EFI_AML_NODE_LIST *CurrentAmlNodeList;
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volatile LIST_ENTRY *CurrentLink;
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UINTN Index;
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CurrentLink = AmlParentNodeList->Children.ForwardLink;
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if (Level == 0) {
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DEBUG ((EFI_D_ERROR, "\\"));
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} else {
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for (Index = 0; Index < Level; Index++) {
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DEBUG ((EFI_D_ERROR, " "));
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}
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AmlPrintNameSeg (AmlParentNodeList->Name);
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}
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DEBUG ((EFI_D_ERROR, "\n"));
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while (CurrentLink != &AmlParentNodeList->Children) {
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CurrentAmlNodeList = EFI_AML_NODE_LIST_FROM_LINK (CurrentLink);
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AmlDumpNodeInfo (CurrentAmlNodeList, Level + 1);
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CurrentLink = CurrentLink->ForwardLink;
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}
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return ;
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}
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/**
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Returns the handle of the ACPI object representing the specified ACPI AML path
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@param[in] AmlHandle Points to the handle of the object representing the starting point for the path search.
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@param[in] AmlPath Points to the ACPI AML path.
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@param[out] Buffer On return, points to the ACPI object which represents AcpiPath, relative to
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HandleIn.
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@param[in] FromRoot TRUE means to find AML path from \ (Root) Node.
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FALSE means to find AML path from this Node (The HandleIn).
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@retval EFI_SUCCESS Success
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@retval EFI_INVALID_PARAMETER HandleIn does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlFindPath (
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IN EFI_AML_HANDLE *AmlHandle,
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IN UINT8 *AmlPath,
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OUT VOID **Buffer,
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IN BOOLEAN FromRoot
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)
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{
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EFI_AML_NODE_LIST *AmlRootNodeList;
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EFI_STATUS Status;
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EFI_AML_NODE_LIST *AmlNodeList;
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UINT8 RootNameSeg[AML_NAME_SEG_SIZE];
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EFI_AML_NODE_LIST *CurrentAmlNodeList;
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LIST_ENTRY *CurrentLink;
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//
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// 1. create tree
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//
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//
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// Create root handle
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//
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RootNameSeg[0] = AML_ROOT_CHAR;
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RootNameSeg[1] = 0;
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AmlRootNodeList = AmlCreateNode (RootNameSeg, NULL, AmlHandle->AmlByteEncoding);
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Status = AmlConstructNodeList (
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AmlHandle,
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AmlRootNodeList, // Root
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AmlRootNodeList // Parent
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);
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if (EFI_ERROR(Status)) {
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return EFI_INVALID_PARAMETER;
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}
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DEBUG_CODE_BEGIN ();
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DEBUG ((EFI_D_ERROR, "AcpiSdt: NameSpace:\n"));
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AmlDumpNodeInfo (AmlRootNodeList, 0);
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DEBUG_CODE_END ();
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//
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// 2. Search the node in the tree
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//
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if (FromRoot) {
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//
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// Search from Root
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//
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CurrentAmlNodeList = AmlRootNodeList;
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} else {
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//
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// Search from this node, NOT ROOT.
|
|
// Since we insert node to ROOT one by one, we just get the first node and search from it.
|
|
//
|
|
CurrentLink = AmlRootNodeList->Children.ForwardLink;
|
|
if (CurrentLink != &AmlRootNodeList->Children) {
|
|
//
|
|
// First node
|
|
//
|
|
CurrentAmlNodeList = EFI_AML_NODE_LIST_FROM_LINK (CurrentLink);
|
|
} else {
|
|
//
|
|
// No child
|
|
//
|
|
CurrentAmlNodeList = NULL;
|
|
}
|
|
}
|
|
|
|
//
|
|
// Search
|
|
//
|
|
if (CurrentAmlNodeList != NULL) {
|
|
DEBUG_CODE_BEGIN ();
|
|
DEBUG ((EFI_D_ERROR, "AcpiSdt: Search from: \\"));
|
|
AmlPrintNameSeg (CurrentAmlNodeList->Name);
|
|
DEBUG ((EFI_D_ERROR, "\n"));
|
|
DEBUG_CODE_END ();
|
|
AmlNodeList = AmlFindNodeInTheTree (
|
|
AmlPath,
|
|
AmlRootNodeList, // Root
|
|
CurrentAmlNodeList, // Parent
|
|
FALSE
|
|
);
|
|
} else {
|
|
AmlNodeList = NULL;
|
|
}
|
|
|
|
*Buffer = NULL;
|
|
Status = EFI_SUCCESS;
|
|
if (AmlNodeList != NULL && AmlNodeList->Buffer != NULL) {
|
|
*Buffer = AmlNodeList->Buffer;
|
|
}
|
|
|
|
//
|
|
// 3. free the tree
|
|
//
|
|
AmlDestructNodeList (AmlRootNodeList);
|
|
|
|
return Status;
|
|
}
|