4e1005eca7
Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Eric Dong <eric.dong@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15695 6f19259b-4bc3-4df7-8a09-765794883524
281 lines
8.2 KiB
C
281 lines
8.2 KiB
C
/** @file
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ACPI Sdt Protocol Driver
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Copyright (c) 2010 - 2014, 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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Return the child objects buffer from AML Handle's buffer.
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@param[in] AmlParentHandle Parent handle.
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@param[in] CurrentBuffer The current child buffer.
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@param[out] Buffer On return, points to the next returned child buffer or NULL if there are no
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child buffer.
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@retval EFI_SUCCESS Success
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@retval EFI_INVALID_PARAMETER AmlParentHandle does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlGetChildFromObjectBuffer (
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IN EFI_AML_HANDLE *AmlParentHandle,
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IN UINT8 *CurrentBuffer,
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OUT VOID **Buffer
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)
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{
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AML_BYTE_ENCODING *AmlByteEncoding;
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UINTN DataSize;
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//
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// Root is considered as SCOPE, which has TermList.
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// We need return only Object in TermList.
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//
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while ((UINTN)CurrentBuffer < (UINTN)(AmlParentHandle->Buffer + AmlParentHandle->Size)) {
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AmlByteEncoding = AmlSearchByOpByte (CurrentBuffer);
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if (AmlByteEncoding == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// NOTE: We need return everything, because user might need parse the returned object.
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//
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if ((AmlByteEncoding->Attribute & AML_IS_NAME_CHAR) == 0) {
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*Buffer = CurrentBuffer;
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return EFI_SUCCESS;
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}
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DataSize = AmlGetObjectSize (
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AmlByteEncoding,
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CurrentBuffer,
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(UINTN)AmlParentHandle->Buffer + AmlParentHandle->Size - (UINTN)CurrentBuffer
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);
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if (DataSize == 0) {
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return EFI_INVALID_PARAMETER;
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}
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CurrentBuffer += DataSize;
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}
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//
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// No more
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//
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*Buffer = NULL;
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return EFI_SUCCESS;
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}
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/**
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Return the child ACPI objects from Root Handle.
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@param[in] AmlParentHandle Parent handle. It is Root Handle.
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@param[in] AmlHandle The previously returned handle or NULL to start with the first handle.
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@param[out] Buffer On return, points to the next returned ACPI handle or NULL if there are no
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child objects.
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@retval EFI_SUCCESS Success
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@retval EFI_INVALID_PARAMETER ParentHandle is NULL or does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlGetChildFromRoot (
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IN EFI_AML_HANDLE *AmlParentHandle,
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IN EFI_AML_HANDLE *AmlHandle,
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OUT VOID **Buffer
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)
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{
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UINT8 *CurrentBuffer;
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if (AmlHandle == NULL) {
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//
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// First One
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//
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CurrentBuffer = (VOID *)AmlParentHandle->Buffer;
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} else {
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CurrentBuffer = (VOID *)(AmlHandle->Buffer + AmlHandle->Size);
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}
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return AmlGetChildFromObjectBuffer (AmlParentHandle, CurrentBuffer, Buffer);
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}
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/**
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Return the child objects buffer from AML Handle's option list.
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@param[in] AmlParentHandle Parent handle.
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@param[in] AmlHandle The current child handle.
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@param[out] Buffer On return, points to the next returned child buffer or NULL if there are no
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child buffer.
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@retval EFI_SUCCESS Success
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@retval EFI_INVALID_PARAMETER AmlParentHandle does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlGetChildFromOptionList (
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IN EFI_AML_HANDLE *AmlParentHandle,
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IN EFI_AML_HANDLE *AmlHandle,
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OUT VOID **Buffer
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)
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{
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EFI_ACPI_DATA_TYPE DataType;
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VOID *Data;
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UINTN DataSize;
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AML_OP_PARSE_INDEX Index;
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EFI_STATUS Status;
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AML_OP_PARSE_INDEX MaxTerm;
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Index = AML_OP_PARSE_INDEX_GET_TERM1;
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MaxTerm = AmlParentHandle->AmlByteEncoding->MaxIndex;
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while (Index <= MaxTerm) {
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Status = AmlParseOptionHandleCommon (
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AmlParentHandle,
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(AML_OP_PARSE_INDEX)Index,
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&DataType,
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(VOID **)&Data,
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&DataSize
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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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if (DataType == EFI_ACPI_DATA_TYPE_NONE) {
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//
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// Not found
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//
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break;
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}
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//
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// Find it, and Check Data
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//
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if ((DataType == EFI_ACPI_DATA_TYPE_CHILD) &&
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((UINTN)AmlHandle->Buffer < (UINTN)Data)) {
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//
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// Buffer < Data means current node is next one
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//
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*Buffer = Data;
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return EFI_SUCCESS;
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}
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//
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// Not Child
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//
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Index ++;
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}
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*Buffer = NULL;
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return EFI_SUCCESS;
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}
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/**
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Return the child objects buffer from AML Handle's object child list.
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@param[in] AmlParentHandle Parent handle.
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@param[in] AmlHandle The current child handle.
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@param[out] Buffer On return, points to the next returned child buffer or NULL if there are no
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child buffer.
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@retval EFI_SUCCESS Success
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@retval EFI_INVALID_PARAMETER AmlParentHandle does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlGetChildFromObjectChildList (
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IN EFI_AML_HANDLE *AmlParentHandle,
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IN EFI_AML_HANDLE *AmlHandle,
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OUT VOID **Buffer
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)
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{
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EFI_STATUS Status;
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UINT8 *CurrentBuffer;
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CurrentBuffer = NULL;
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if ((AmlParentHandle->AmlByteEncoding->Attribute & AML_HAS_CHILD_OBJ) == 0) {
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//
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// No ObjectList
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//
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*Buffer = NULL;
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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 (AmlParentHandle, &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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if ((UINTN)AmlHandle->Buffer < (UINTN)CurrentBuffer) {
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//
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// Buffer < Data means next node is first object
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//
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} else if ((UINTN)AmlHandle->Buffer + AmlHandle->Size < (UINTN)AmlParentHandle->Buffer + AmlParentHandle->Size) {
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//
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// There is still more node
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//
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CurrentBuffer = AmlHandle->Buffer + AmlHandle->Size;
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} else {
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//
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// No more data
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//
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*Buffer = NULL;
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return EFI_SUCCESS;
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}
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return AmlGetChildFromObjectBuffer (AmlParentHandle, CurrentBuffer, Buffer);
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}
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/**
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Return the child ACPI objects from Non-Root Handle.
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@param[in] AmlParentHandle Parent handle. It is Non-Root Handle.
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@param[in] AmlHandle The previously returned handle or NULL to start with the first handle.
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@param[out] Buffer On return, points to the next returned ACPI handle or NULL if there are no
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child objects.
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@retval EFI_SUCCESS Success
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@retval EFI_INVALID_PARAMETER ParentHandle is NULL or does not refer to a valid ACPI object.
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**/
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EFI_STATUS
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AmlGetChildFromNonRoot (
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IN EFI_AML_HANDLE *AmlParentHandle,
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IN EFI_AML_HANDLE *AmlHandle,
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OUT VOID **Buffer
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)
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{
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EFI_STATUS Status;
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if (AmlHandle == NULL) {
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//
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// NULL means first one
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//
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AmlHandle = AmlParentHandle;
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}
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//
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// 1. Get Option
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//
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Status = AmlGetChildFromOptionList (AmlParentHandle, AmlHandle, Buffer);
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if (EFI_ERROR (Status)) {
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return EFI_INVALID_PARAMETER;
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}
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if (*Buffer != NULL) {
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return EFI_SUCCESS;
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}
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//
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// 2. search ObjectList
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//
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return AmlGetChildFromObjectChildList (AmlParentHandle, AmlHandle, Buffer);
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}
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