//.........这里部分代码省略.........
/* Allocate a new temporary root for this subtree */
RootOp = TrAllocateNode (PARSEOP_INTEGER);
if (!RootOp)
{
return (AE_NO_MEMORY);
}
RootOp->Common.AmlOpcode = AML_INT_EVAL_SUBTREE_OP;
OriginalParentOp = Op->Common.Parent;
Op->Common.Parent = RootOp;
/* Hand off the subtree to the AML interpreter */
Status = TrWalkParseTree (Op, ASL_WALK_VISIT_TWICE,
OpcAmlEvaluationWalk1, OpcAmlEvaluationWalk2, WalkState);
Op->Common.Parent = OriginalParentOp;
/* TBD: we really *should* release the RootOp node */
if (ACPI_SUCCESS (Status))
{
TotalFolds++;
/* Get the final result */
Status = AcpiDsResultPop (&ObjDesc, WalkState);
}
/* Check for error from the ACPICA core */
if (ACPI_FAILURE (Status))
{
AslCoreSubsystemError (Op, Status,
"Failure during constant evaluation", FALSE);
}
}
if (ACPI_FAILURE (Status))
{
/* We could not resolve the subtree for some reason */
AslError (ASL_ERROR, ASL_MSG_CONSTANT_EVALUATION, Op,
Op->Asl.ParseOpName);
/* Set the subtree value to ZERO anyway. Eliminates further errors */
OpcUpdateIntegerNode (Op, 0);
}
else
{
AslError (ASL_OPTIMIZATION, ASL_MSG_CONSTANT_FOLDED, Op,
Op->Asl.ParseOpName);
/*
* Because we know we executed type 3/4/5 opcodes above, we know that
* the result must be either an Integer, String, or Buffer.
*/
switch (ObjDesc->Common.Type)
{
case ACPI_TYPE_INTEGER:
OpcUpdateIntegerNode (Op, ObjDesc->Integer.Value);
static acpi_status acpi_ns_delete_subtree(acpi_handle start_handle)
{
acpi_status status;
acpi_handle child_handle;
acpi_handle parent_handle;
acpi_handle next_child_handle;
acpi_handle dummy;
u32 level;
ACPI_FUNCTION_TRACE(ns_delete_subtree);
parent_handle = start_handle;
child_handle = NULL;
level = 1;
/*
* Traverse the tree of objects until we bubble back up
* to where we started.
*/
while (level > 0) {
/* Attempt to get the next object in this scope */
status = acpi_get_next_object(ACPI_TYPE_ANY, parent_handle,
child_handle, &next_child_handle);
child_handle = next_child_handle;
/* Did we get a new object? */
if (ACPI_SUCCESS(status)) {
/* Check if this object has any children */
if (ACPI_SUCCESS
(acpi_get_next_object
(ACPI_TYPE_ANY, child_handle, NULL, &dummy))) {
/*
* There is at least one child of this object,
* visit the object
*/
level++;
parent_handle = child_handle;
child_handle = NULL;
}
} else {
/*
* No more children in this object, go back up to
* the object's parent
*/
level--;
/* Delete all children now */
acpi_ns_delete_children(child_handle);
child_handle = parent_handle;
status = acpi_get_parent(parent_handle, &parent_handle);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
}
/* Now delete the starting object, and we are done */
acpi_ns_remove_node(child_handle);
return_ACPI_STATUS(AE_OK);
}
static int acpi_processor_get_info(struct acpi_processor *pr)
{
acpi_status status = 0;
union acpi_object object = { 0 };
struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
int cpu_index;
static int cpu0_initialized;
if (!pr)
return -EINVAL;
if (num_online_cpus() > 1)
errata.smp = TRUE;
acpi_processor_errata(pr);
/*
* Check to see if we have bus mastering arbitration control. This
* is required for proper C3 usage (to maintain cache coherency).
*/
if (acpi_fadt.V1_pm2_cnt_blk && acpi_fadt.pm2_cnt_len) {
pr->flags.bm_control = 1;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Bus mastering arbitration control present\n"));
} else
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"No bus mastering arbitration control\n"));
/*
* Evalute the processor object. Note that it is common on SMP to
* have the first (boot) processor with a valid PBLK address while
* all others have a NULL address.
*/
status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer);
if (ACPI_FAILURE(status)) {
printk(KERN_ERR PREFIX "Evaluating processor object\n");
return -ENODEV;
}
/*
* TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP.
* >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c
*/
pr->acpi_id = object.processor.proc_id;
cpu_index = convert_acpiid_to_cpu(pr->acpi_id);
/* Handle UP system running SMP kernel, with no LAPIC in MADT */
if (!cpu0_initialized && (cpu_index == -1) &&
(num_online_cpus() == 1)) {
cpu_index = 0;
}
cpu0_initialized = 1;
pr->id = cpu_index;
/*
* Extra Processor objects may be enumerated on MP systems with
* less than the max # of CPUs. They should be ignored _iff
* they are physically not present.
*/
if (cpu_index == -1) {
if (ACPI_FAILURE
(acpi_processor_hotadd_init(pr->handle, &pr->id)) &&
!processor_cntl_external()) {
printk(KERN_ERR PREFIX
"Getting cpuindex for acpiid 0x%x\n",
pr->acpi_id);
return -ENODEV;
}
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id,
pr->acpi_id));
if (!object.processor.pblk_address)
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n"));
else if (object.processor.pblk_length != 6)
printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n",
object.processor.pblk_length);
else {
pr->throttling.address = object.processor.pblk_address;
pr->throttling.duty_offset = acpi_fadt.duty_offset;
pr->throttling.duty_width = acpi_fadt.duty_width;
pr->pblk = object.processor.pblk_address;
/*
* We don't care about error returns - we just try to mark
* these reserved so that nobody else is confused into thinking
* that this region might be unused..
*
* (In particular, allocating the IO range for Cardbus)
*/
request_region(pr->throttling.address, 6, "ACPI CPU throttle");
}
return 0;
//.........这里部分代码省略.........
ACPI_STATUS
AslDoOneFile (
char *Filename)
{
ACPI_STATUS Status;
/* Re-initialize "some" compiler/preprocessor globals */
AslInitializeGlobals ();
PrInitializeGlobals ();
/*
* Extract the directory path. This path is used for possible include
* files and the optional AML filename embedded in the input file
* DefinitionBlock declaration.
*/
Status = FlSplitInputPathname (Filename, &Gbl_DirectoryPath, NULL);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Take a copy of the input filename, convert any backslashes */
Gbl_Files[ASL_FILE_INPUT].Filename =
UtStringCacheCalloc (strlen (Filename) + 1);
strcpy (Gbl_Files[ASL_FILE_INPUT].Filename, Filename);
UtConvertBackslashes (Gbl_Files[ASL_FILE_INPUT].Filename);
/*
* AML Disassembly (Optional)
*/
if (Gbl_DisasmFlag)
{
Status = AslDoDisassembly ();
if (Status != AE_CTRL_CONTINUE)
{
return (Status);
}
}
/*
* Open the input file. Here, this should be an ASCII source file,
* either an ASL file or a Data Table file
*/
Status = FlOpenInputFile (Gbl_Files[ASL_FILE_INPUT].Filename);
if (ACPI_FAILURE (Status))
{
AePrintErrorLog (ASL_FILE_STDERR);
return (AE_ERROR);
}
/* Determine input file type */
Gbl_FileType = AslDetectSourceFileType (&Gbl_Files[ASL_FILE_INPUT]);
if (Gbl_FileType == ASL_INPUT_TYPE_BINARY)
{
return (AE_ERROR);
}
/*
* If -p not specified, we will use the input filename as the
* output filename prefix
*/
if (Gbl_UseDefaultAmlFilename)
{
Gbl_OutputFilenamePrefix = Gbl_Files[ASL_FILE_INPUT].Filename;
}
/* Open the optional output files (listings, etc.) */
Status = FlOpenMiscOutputFiles (Gbl_OutputFilenamePrefix);
if (ACPI_FAILURE (Status))
{
AePrintErrorLog (ASL_FILE_STDERR);
return (AE_ERROR);
}
/*
* Compilation of ASL source versus DataTable source uses different
* compiler subsystems
*/
switch (Gbl_FileType)
{
/*
* Data Table Compilation
*/
case ASL_INPUT_TYPE_ASCII_DATA:
Status = DtDoCompile ();
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (Gbl_Signature)
{
Gbl_Signature = NULL;
//.........这里部分代码省略.........
//.........这里部分代码省略.........
/*
* Only allow automatic parent search (search rules) if the caller
* requested it AND we have a single, non-fully-qualified NameSeg
*/
if ((SearchParentFlag != ACPI_NS_NO_UPSEARCH) &&
(Flags & ACPI_NS_SEARCH_PARENT))
{
LocalFlags |= ACPI_NS_SEARCH_PARENT;
}
/* Set error flag according to caller */
if (Flags & ACPI_NS_ERROR_IF_FOUND)
{
LocalFlags |= ACPI_NS_ERROR_IF_FOUND;
}
/* Set override flag according to caller */
if (Flags & ACPI_NS_OVERRIDE_IF_FOUND)
{
LocalFlags |= ACPI_NS_OVERRIDE_IF_FOUND;
}
}
/* Extract one ACPI name from the front of the pathname */
ACPI_MOVE_32_TO_32 (&SimpleName, Path);
/* Try to find the single (4 character) ACPI name */
Status = AcpiNsSearchAndEnter (SimpleName, WalkState, CurrentNode,
InterpreterMode, ThisSearchType, LocalFlags, &ThisNode);
if (ACPI_FAILURE (Status))
{
if (Status == AE_NOT_FOUND)
{
/* Name not found in ACPI namespace */
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
"Name [%4.4s] not found in scope [%4.4s] %p\n",
(char *) &SimpleName, (char *) &CurrentNode->Name,
CurrentNode));
}
*ReturnNode = ThisNode;
return_ACPI_STATUS (Status);
}
/* More segments to follow? */
if (NumSegments > 0)
{
/*
* If we have an alias to an object that opens a scope (such as a
* device or processor), we need to dereference the alias here so
* that we can access any children of the original node (via the
* remaining segments).
*/
if (ThisNode->Type == ACPI_TYPE_LOCAL_ALIAS)
{
if (!ThisNode->Object)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
ACPI_STATUS
AcpiEvMatchGpeMethod (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_NAMESPACE_NODE *MethodNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
ACPI_GPE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_GPE_WALK_INFO, Context);
ACPI_GPE_EVENT_INFO *GpeEventInfo;
ACPI_STATUS Status;
UINT32 GpeNumber;
UINT8 TempGpeNumber;
char Name[ACPI_NAME_SIZE + 1];
UINT8 Type;
ACPI_FUNCTION_TRACE (EvMatchGpeMethod);
/* Check if requested OwnerId matches this OwnerId */
if ((WalkInfo->ExecuteByOwnerId) &&
(MethodNode->OwnerId != WalkInfo->OwnerId))
{
return_ACPI_STATUS (AE_OK);
}
/*
* Match and decode the _Lxx and _Exx GPE method names
*
* 1) Extract the method name and null terminate it
*/
ACPI_MOVE_32_TO_32 (Name, &MethodNode->Name.Integer);
Name[ACPI_NAME_SIZE] = 0;
/* 2) Name must begin with an underscore */
if (Name[0] != '_')
{
return_ACPI_STATUS (AE_OK); /* Ignore this method */
}
/*
* 3) Edge/Level determination is based on the 2nd character
* of the method name
*/
switch (Name[1])
{
case 'L':
Type = ACPI_GPE_LEVEL_TRIGGERED;
break;
case 'E':
Type = ACPI_GPE_EDGE_TRIGGERED;
break;
default:
/* Unknown method type, just ignore it */
ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
"Ignoring unknown GPE method type: %s "
"(name not of form _Lxx or _Exx)", Name));
return_ACPI_STATUS (AE_OK);
}
/* 4) The last two characters of the name are the hex GPE Number */
Status = AcpiUtAsciiToHexByte (&Name[2], &TempGpeNumber);
if (ACPI_FAILURE (Status))
{
/* Conversion failed; invalid method, just ignore it */
ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
"Could not extract GPE number from name: %s "
"(name is not of form _Lxx or _Exx)", Name));
return_ACPI_STATUS (AE_OK);
}
/* Ensure that we have a valid GPE number for this GPE block */
GpeNumber = (UINT32) TempGpeNumber;
GpeEventInfo = AcpiEvLowGetGpeInfo (GpeNumber, WalkInfo->GpeBlock);
if (!GpeEventInfo)
{
/*
* This GpeNumber is not valid for this GPE block, just ignore it.
* However, it may be valid for a different GPE block, since GPE0
* and GPE1 methods both appear under \_GPE.
*/
return_ACPI_STATUS (AE_OK);
}
if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
ACPI_GPE_DISPATCH_HANDLER) ||
(ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
ACPI_GPE_DISPATCH_RAW_HANDLER))
//.........这里部分代码省略.........
static UINT8
AslDetectSourceFileType (
ASL_FILE_INFO *Info)
{
char *FileChar;
UINT8 Type;
ACPI_STATUS Status;
/* Check for a valid binary ACPI table */
Status = FlCheckForAcpiTable (Info->Handle);
if (ACPI_SUCCESS (Status))
{
Type = ASL_INPUT_TYPE_ACPI_TABLE;
goto Cleanup;
}
/* Check for 100% ASCII source file (comments are ignored) */
Status = FlCheckForAscii (Info->Handle, Info->Filename, TRUE);
if (ACPI_FAILURE (Status))
{
printf ("Non-ascii input file - %s\n", Info->Filename);
if (!Gbl_IgnoreErrors)
{
Type = ASL_INPUT_TYPE_BINARY;
goto Cleanup;
}
}
/*
* File is ASCII. Determine if this is an ASL file or an ACPI data
* table file.
*/
while (fgets (Gbl_CurrentLineBuffer, Gbl_LineBufferSize, Info->Handle))
{
/* Uppercase the buffer for caseless compare */
FileChar = Gbl_CurrentLineBuffer;
while (*FileChar)
{
*FileChar = (char) toupper ((int) *FileChar);
FileChar++;
}
/* Presence of "DefinitionBlock" indicates actual ASL code */
if (strstr (Gbl_CurrentLineBuffer, "DEFINITIONBLOCK"))
{
/* Appears to be an ASL file */
Type = ASL_INPUT_TYPE_ASCII_ASL;
goto Cleanup;
}
}
/* Not an ASL source file, default to a data table source file */
Type = ASL_INPUT_TYPE_ASCII_DATA;
Cleanup:
/* Must seek back to the start of the file */
fseek (Info->Handle, 0, SEEK_SET);
return (Type);
}
ACPI_STATUS
acpi_evaluate_reference (
ACPI_HANDLE handle,
ACPI_STRING pathname,
ACPI_OBJECT_LIST *arguments,
struct acpi_handle_list *list)
{
ACPI_STATUS status = AE_OK;
ACPI_OBJECT *package = NULL;
ACPI_OBJECT *element = NULL;
ACPI_BUFFER buffer = {ACPI_ALLOCATE_BUFFER, NULL};
UINT32 i = 0;
ACPI_FUNCTION_TRACE("acpi_evaluate_reference");
if (!list) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Evaluate object. */
status = AcpiEvaluateObject(handle, pathname, arguments, &buffer);
if (ACPI_FAILURE(status))
goto end;
package = (ACPI_OBJECT *) buffer.Pointer;
if ((buffer.Length == 0) || !package) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"No return object (len %X ptr %p)\n",
buffer.Length, package));
status = AE_BAD_DATA;
acpi_util_eval_error(handle, pathname, status);
goto end;
}
if (package->Type != ACPI_TYPE_PACKAGE) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Expecting a [Package], found type %X\n",
package->Type));
status = AE_BAD_DATA;
acpi_util_eval_error(handle, pathname, status);
goto end;
}
if (!package->Package.Count) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"[Package] has zero elements (%p)\n",
package));
status = AE_BAD_DATA;
acpi_util_eval_error(handle, pathname, status);
goto end;
}
if (package->Package.Count > ACPI_MAX_HANDLES) {
return AE_NO_MEMORY;
}
list->count = package->Package.Count;
/* Extract package data. */
for (i = 0; i < list->count; i++) {
element = &(package->Package.Elements[i]);
if (element->Type != ACPI_TYPE_LOCAL_REFERENCE) {
status = AE_BAD_DATA;
ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
"Expecting a [Reference] package element, found type %X\n",
element->type));
acpi_util_eval_error(handle, pathname, status);
break;
}
if (!element->Reference.Handle) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid reference in"
" package %s\n", pathname));
status = AE_NULL_ENTRY;
break;
}
/* Get the ACPI_HANDLE. */
list->handles[i] = element->Reference.Handle;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found reference [%p]\n",
list->handles[i]));
}
end:
if (ACPI_FAILURE(status)) {
list->count = 0;
//ExFreePool(list->handles);
}
if (buffer.Pointer)
AcpiOsFree(buffer.Pointer);
return_ACPI_STATUS(status);
}
开发者ID:reactos，项目名称:reactos，代码行数:96，代码来源:utils.c
示例10: AcpiNsGetDeviceCallback
static ACPI_STATUS
AcpiNsGetDeviceCallback (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue)
{
ACPI_GET_DEVICES_INFO *Info = Context;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *Node;
UINT32 Flags;
ACPI_DEVICE_ID *Hid;
ACPI_DEVICE_ID_LIST *Cid;
UINT32 i;
BOOLEAN Found;
int NoMatch;
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return (Status);
}
Node = AcpiNsMapHandleToNode (ObjHandle);
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (!Node)
{
return (AE_BAD_PARAMETER);
}
/* Run _STA to determine if device is present */
Status = AcpiUtExecute_STA (Node, &Flags);
if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
if (!(Flags & ACPI_STA_DEVICE_PRESENT) &&
!(Flags & ACPI_STA_DEVICE_FUNCTIONING))
{
/*
* Don't examine the children of the device only when the
* device is neither present nor functional. See ACPI spec,
* description of _STA for more information.
*/
return (AE_CTRL_DEPTH);
}
/* Filter based on device HID & CID */
if (Info->Hid != NULL)
{
Status = AcpiUtExecute_HID (Node, &Hid);
if (Status == AE_NOT_FOUND)
{
return (AE_OK);
}
else if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
NoMatch = ACPI_STRCMP (Hid->String, Info->Hid);
ACPI_FREE (Hid);
if (NoMatch)
{
/*
* HID does not match, attempt match within the
* list of Compatible IDs (CIDs)
*/
Status = AcpiUtExecute_CID (Node, &Cid);
if (Status == AE_NOT_FOUND)
{
return (AE_OK);
}
else if (ACPI_FAILURE (Status))
{
return (AE_CTRL_DEPTH);
}
/* Walk the CID list */
Found = FALSE;
for (i = 0; i < Cid->Count; i++)
{
if (ACPI_STRCMP (Cid->Ids[i].String, Info->Hid) == 0)
{
/* Found a matching CID */
Found = TRUE;
break;
}
//.........这里部分代码省略.........
acpi_status
acpi_ns_evaluate_relative (
acpi_namespace_node *handle,
NATIVE_CHAR *pathname,
acpi_operand_object **params,
acpi_operand_object **return_object)
{
acpi_namespace_node *prefix_node;
acpi_status status;
acpi_namespace_node *node = NULL;
NATIVE_CHAR *internal_path = NULL;
acpi_generic_state scope_info;
FUNCTION_TRACE ("Ns_evaluate_relative");
/*
* Must have a valid object handle
*/
if (!handle) {
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Build an internal name string for the method */
status = acpi_ns_internalize_name (pathname, &internal_path);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Get the prefix handle and Node */
acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
prefix_node = acpi_ns_map_handle_to_node (handle);
if (!prefix_node) {
acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
status = AE_BAD_PARAMETER;
goto cleanup;
}
/* Lookup the name in the namespace */
scope_info.scope.node = prefix_node;
status = acpi_ns_lookup (&scope_info, internal_path, ACPI_TYPE_ANY,
IMODE_EXECUTE, NS_NO_UPSEARCH, NULL,
&node);
acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (status)) {
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Object [%s] not found [%s]\n",
pathname, acpi_format_exception (status)));
goto cleanup;
}
/*
* Now that we have a handle to the object, we can attempt
* to evaluate it.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s [%p] Value %p\n",
pathname, node, node->object));
status = acpi_ns_evaluate_by_handle (node, params, return_object);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "*** Completed eval of object %s ***\n",
pathname));
cleanup:
ACPI_MEM_FREE (internal_path);
return_ACPI_STATUS (status);
}
开发者ID:TitaniumBoy，项目名称:lin，代码行数:74，代码来源:nseval.c
示例12: AcpiWalkNamespace
ACPI_STATUS
AcpiWalkNamespace (
ACPI_OBJECT_TYPE Type,
ACPI_HANDLE StartObject,
UINT32 MaxDepth,
ACPI_WALK_CALLBACK UserFunction,
void *Context,
void **ReturnValue)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiWalkNamespace);
/* Parameter validation */
if ((Type > ACPI_TYPE_LOCAL_MAX) ||
(!MaxDepth) ||
(!UserFunction))
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Need to acquire the namespace reader lock to prevent interference
* with any concurrent table unloads (which causes the deletion of
* namespace objects). We cannot allow the deletion of a namespace node
* while the user function is using it. The exception to this are the
* nodes created and deleted during control method execution -- these
* nodes are marked as temporary nodes and are ignored by the namespace
* walk. Thus, control methods can be executed while holding the
* namespace deletion lock (and the user function can execute control
* methods.)
*/
Status = AcpiUtAcquireReadLock (&AcpiGbl_NamespaceRwLock);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/*
* Lock the namespace around the walk. The namespace will be
* unlocked/locked around each call to the user function - since the user
* function must be allowed to make ACPICA calls itself (for example, it
* will typically execute control methods during device enumeration.)
*/
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
goto UnlockAndExit;
}
Status = AcpiNsWalkNamespace (Type, StartObject, MaxDepth,
ACPI_NS_WALK_UNLOCK, UserFunction, Context, ReturnValue);
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
UnlockAndExit:
(void) AcpiUtReleaseReadLock (&AcpiGbl_NamespaceRwLock);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiEvaluateObject (
ACPI_HANDLE Handle,
ACPI_STRING Pathname,
ACPI_OBJECT_LIST *ExternalParams,
ACPI_BUFFER *ReturnBuffer)
{
ACPI_STATUS Status;
ACPI_EVALUATE_INFO *Info;
ACPI_SIZE BufferSpaceNeeded;
UINT32 i;
ACPI_FUNCTION_TRACE (AcpiEvaluateObject);
/* Allocate and initialize the evaluation information block */
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Info->Pathname = Pathname;
/* Convert and validate the device handle */
Info->PrefixNode = AcpiNsMapHandleToNode (Handle);
if (!Info->PrefixNode)
{
Status = AE_BAD_PARAMETER;
goto Cleanup;
}
/*
* If there are parameters to be passed to a control method, the external
* objects must all be converted to internal objects
*/
if (ExternalParams && ExternalParams->Count)
{
/*
* Allocate a new parameter block for the internal objects
* Add 1 to count to allow for null terminated internal list
*/
Info->Parameters = ACPI_ALLOCATE_ZEROED (
((ACPI_SIZE) ExternalParams->Count + 1) * sizeof (void *));
if (!Info->Parameters)
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Convert each external object in the list to an internal object */
for (i = 0; i < ExternalParams->Count; i++)
{
Status = AcpiUtCopyEobjectToIobject (
&ExternalParams->Pointer[i], &Info->Parameters[i]);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
}
Info->Parameters[ExternalParams->Count] = NULL;
}
/*
* Three major cases:
* 1) Fully qualified pathname
* 2) No handle, not fully qualified pathname (error)
* 3) Valid handle
*/
if ((Pathname) &&
(AcpiNsValidRootPrefix (Pathname[0])))
{
/* The path is fully qualified, just evaluate by name */
Info->PrefixNode = NULL;
Status = AcpiNsEvaluate (Info);
}
else if (!Handle)
{
/*
* A handle is optional iff a fully qualified pathname is specified.
* Since we've already handled fully qualified names above, this is
* an error
*/
if (!Pathname)
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Both Handle and Pathname are NULL"));
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"Null Handle with relative pathname [%s]", Pathname));
}
Status = AE_BAD_PARAMETER;
//.........这里部分代码省略.........
ACPI_STATUS
AcpiEvGpeInitialize (
void)
{
UINT32 RegisterCount0 = 0;
UINT32 RegisterCount1 = 0;
UINT32 GpeNumberMax = 0;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvGpeInitialize);
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"Initializing General Purpose Events (GPEs):\n"));
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Initialize the GPE Block(s) defined in the FADT
*
* Why the GPE register block lengths are divided by 2: From the ACPI
* Spec, section "General-Purpose Event Registers", we have:
*
* "Each register block contains two registers of equal length
* GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
* GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
* The length of the GPE1_STS and GPE1_EN registers is equal to
* half the GPE1_LEN. If a generic register block is not supported
* then its respective block pointer and block length values in the
* FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
* to be the same size."
*/
/*
* Determine the maximum GPE number for this machine.
*
* Note: both GPE0 and GPE1 are optional, and either can exist without
* the other.
*
* If EITHER the register length OR the block address are zero, then that
* particular block is not supported.
*/
if (AcpiGbl_FADT.Gpe0BlockLength &&
AcpiGbl_FADT.XGpe0Block.Address)
{
/* GPE block 0 exists (has both length and address > 0) */
RegisterCount0 = (UINT16) (AcpiGbl_FADT.Gpe0BlockLength / 2);
GpeNumberMax = (RegisterCount0 * ACPI_GPE_REGISTER_WIDTH) - 1;
/* Install GPE Block 0 */
Status = AcpiEvCreateGpeBlock (AcpiGbl_FadtGpeDevice,
AcpiGbl_FADT.XGpe0Block.Address,
AcpiGbl_FADT.XGpe0Block.SpaceId,
RegisterCount0, 0,
AcpiGbl_FADT.SciInterrupt, &AcpiGbl_GpeFadtBlocks[0]);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not create GPE Block 0"));
}
}
if (AcpiGbl_FADT.Gpe1BlockLength &&
AcpiGbl_FADT.XGpe1Block.Address)
{
/* GPE block 1 exists (has both length and address > 0) */
RegisterCount1 = (UINT16) (AcpiGbl_FADT.Gpe1BlockLength / 2);
/* Check for GPE0/GPE1 overlap (if both banks exist) */
if ((RegisterCount0) &&
(GpeNumberMax >= AcpiGbl_FADT.Gpe1Base))
{
ACPI_ERROR ((AE_INFO,
"GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
"(GPE %u to %u) - Ignoring GPE1",
GpeNumberMax, AcpiGbl_FADT.Gpe1Base,
AcpiGbl_FADT.Gpe1Base +
((RegisterCount1 * ACPI_GPE_REGISTER_WIDTH) - 1)));
/* Ignore GPE1 block by setting the register count to zero */
RegisterCount1 = 0;
}
else
{
/* Install GPE Block 1 */
Status = AcpiEvCreateGpeBlock (AcpiGbl_FadtGpeDevice,
AcpiGbl_FADT.XGpe1Block.Address,
AcpiGbl_FADT.XGpe1Block.SpaceId,
//.........这里部分代码省略.........
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