C++ ACPI_MEMSET函數代碼示例

acpi_status __init
acpi_initialize_tables(struct acpi_table_desc * initial_table_array,
		       u32 initial_table_count, u8 allow_resize)
{
	acpi_physical_address rsdp_address;
	acpi_status status;

	ACPI_FUNCTION_TRACE(acpi_initialize_tables);

	/*
	 * Set up the Root Table Array
	 * Allocate the table array if requested
	 */
	if (!initial_table_array) {
		status = acpi_allocate_root_table(initial_table_count);
		if (ACPI_FAILURE(status)) {
			return_ACPI_STATUS(status);
		}
	} else {
		/* Root Table Array has been statically allocated by the host */

		ACPI_MEMSET(initial_table_array, 0,
			    (acpi_size) initial_table_count *
			    sizeof(struct acpi_table_desc));

		acpi_gbl_root_table_list.tables = initial_table_array;
		acpi_gbl_root_table_list.max_table_count = initial_table_count;
		acpi_gbl_root_table_list.flags = ACPI_ROOT_ORIGIN_UNKNOWN;
		if (allow_resize) {
			acpi_gbl_root_table_list.flags |=
			    ACPI_ROOT_ALLOW_RESIZE;
		}
	}

	/* Get the address of the RSDP */

	rsdp_address = acpi_os_get_root_pointer();
	if (!rsdp_address) {
		return_ACPI_STATUS(AE_NOT_FOUND);
	}

	/*
	 * Get the root table (RSDT or XSDT) and extract all entries to the local
	 * Root Table Array. This array contains the information of the RSDT/XSDT
	 * in a common, more useable format.
	 */
	status = acpi_tb_parse_root_table(rsdp_address);
	return_ACPI_STATUS(status);
}

void *
AcpiOsAllocateZeroed (
    ACPI_SIZE               Size)
{
    void                    *Mem;


    Mem = AcpiOsAllocate (Size);
    if (Mem)
    {
        ACPI_MEMSET (Mem, 0, Size);
    }

    return (Mem);
}

void
AcpiTbCreateLocalFadt (
    ACPI_TABLE_HEADER       *Table,
    UINT32                  Length)
{

    /*
     * Check if the FADT is larger than the largest table that we expect
     * (the ACPI 5.0 version). If so, truncate the table, and issue
     * a warning.
     */
    if (Length > sizeof (ACPI_TABLE_FADT))
    {
        ACPI_BIOS_WARNING ((AE_INFO,
            "FADT (revision %u) is longer than ACPI 5.0 version, "
            "truncating length %u to %u",
            Table->Revision, Length, (UINT32) sizeof (ACPI_TABLE_FADT)));
    }

    /* Clear the entire local FADT */

    ACPI_MEMSET (&AcpiGbl_FADT, 0, sizeof (ACPI_TABLE_FADT));

    /* Copy the original FADT, up to sizeof (ACPI_TABLE_FADT) */

    ACPI_MEMCPY (&AcpiGbl_FADT, Table,
        ACPI_MIN (Length, sizeof (ACPI_TABLE_FADT)));

    /* Take a copy of the Hardware Reduced flag */

    AcpiGbl_ReducedHardware = FALSE;
    if (AcpiGbl_FADT.Flags & ACPI_FADT_HW_REDUCED)
    {
        AcpiGbl_ReducedHardware = TRUE;
    }

    /* Convert the local copy of the FADT to the common internal format */

    AcpiTbConvertFadt ();

    /* Validate FADT values now, before we make any changes */

    AcpiTbValidateFadt ();

    /* Initialize the global ACPI register structures */

    AcpiTbSetupFadtRegisters ();
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_tb_init_table_descriptor
 *
 * PARAMETERS:  table_desc              - Table descriptor
 *              address                 - Physical address of the table
 *              flags                   - Allocation flags of the table
 *              table                   - Pointer to the table
 *
 * RETURN:      None
 *
 * DESCRIPTION: Initialize a new table descriptor
 *
 ******************************************************************************/
void
acpi_tb_init_table_descriptor(struct acpi_table_desc *table_desc,
			      acpi_physical_address address,
			      u8 flags, struct acpi_table_header *table)
{

	/*
	 * Initialize the table descriptor. Set the pointer to NULL, since the
	 * table is not fully mapped at this time.
	 */
	ACPI_MEMSET(table_desc, 0, sizeof(struct acpi_table_desc));
	table_desc->address = address;
	table_desc->length = table->length;
	table_desc->flags = flags;
	ACPI_MOVE_32_TO_32(table_desc->signature.ascii, table->signature);
}

acpi_status acpi_ns_initialize_objects(void)
{
	acpi_status status;
	struct acpi_init_walk_info info;

	ACPI_FUNCTION_TRACE(ns_initialize_objects);

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "**** Starting initialization of namespace objects ****\n"));
	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
			      "Completing Region/Field/Buffer/Package initialization:"));

	/* Set all init info to zero */

	ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info));

	/* Walk entire namespace from the supplied root */

	status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
				     ACPI_UINT32_MAX, acpi_ns_init_one_object, NULL,
				     &info, NULL);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
	}

	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
<<<<<<< HEAD
			      "\nInitialized %u/%u Regions %u/%u Fields %u/%u "
			      "Buffers %u/%u Packages (%u nodes)\n",
=======
			      "\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd "
			      "Buffers %hd/%hd Packages (%hd nodes)\n",
>>>>>>> 296c66da8a02d52243f45b80521febece5ed498a
			      info.op_region_init, info.op_region_count,
			      info.field_init, info.field_count,
			      info.buffer_init, info.buffer_count,
			      info.package_init, info.package_count,
			      info.object_count));

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
<<<<<<< HEAD
			  "%u Control Methods found\n", info.method_count));
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "%u Op Regions found\n", info.op_region_count));
=======
			  "%hd Control Methods found\n", info.method_count));

void *acpi_os_acquire_object(struct acpi_memory_list *cache)
{
	acpi_status status;
	void *object;

	ACPI_FUNCTION_NAME(os_acquire_object);

	if (!cache) {
		return (NULL);
	}

	status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
	if (ACPI_FAILURE(status)) {
		return (NULL);
	}

	ACPI_MEM_TRACKING(cache->requests++);

	/* Check the cache first */

	if (cache->list_head) {

		/* There is an object available, use it */

		object = cache->list_head;
		cache->list_head = *(ACPI_CAST_INDIRECT_PTR(char,
							    &(((char *)
							       object)[cache->
								       link_offset])));

		cache->current_depth--;

		ACPI_MEM_TRACKING(cache->hits++);
		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
				  "Object %p from %s cache\n", object,
				  cache->list_name));

		status = acpi_ut_release_mutex(ACPI_MTX_CACHES);
		if (ACPI_FAILURE(status)) {
			return (NULL);
		}

		/* Clear (zero) the previously used Object */

		ACPI_MEMSET(object, 0, cache->object_size);
	} else {

void *acpi_ut_allocate_zeroed(acpi_size size,
			      u32 component, char *module, u32 line)
{
	void *allocation;

	ACPI_FUNCTION_ENTRY();

	allocation = acpi_ut_allocate(size, component, module, line);
	if (allocation) {

		/* Clear the memory block */

		ACPI_MEMSET(allocation, 0, size);
	}

	return (allocation);
}

void *
AcpiUtAcquireFromCache (
    UINT32                  ListId)
{
    ACPI_MEMORY_LIST        *CacheInfo;
    void                    *Object;


    ACPI_FUNCTION_NAME ("UtAcquireFromCache");


    CacheInfo = &AcpiGbl_MemoryLists[ListId];
    if (ACPI_FAILURE (AcpiUtAcquireMutex (ACPI_MTX_CACHES)))
    {
        return (NULL);
    }

    ACPI_MEM_TRACKING (CacheInfo->CacheRequests++);

    /* Check the cache first */

    if (CacheInfo->ListHead)
    {
        /* There is an object available, use it */

        Object = CacheInfo->ListHead;
        CacheInfo->ListHead = *(ACPI_CAST_INDIRECT_PTR (char, &(((char *) Object)[CacheInfo->LinkOffset])));

        ACPI_MEM_TRACKING (CacheInfo->CacheHits++);
        CacheInfo->CacheDepth--;

#ifdef ACPI_DBG_TRACK_ALLOCATIONS
        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Object %p from %s\n",
                           Object, AcpiGbl_MemoryLists[ListId].ListName));
#endif

        if (ACPI_FAILURE (AcpiUtReleaseMutex (ACPI_MTX_CACHES)))
        {
            return (NULL);
        }

        /* Clear (zero) the previously used Object */

        ACPI_MEMSET (Object, 0, CacheInfo->ObjectSize);
    }

acpi_status
acpi_os_release_object(struct acpi_memory_list * cache, void *object)
{
	acpi_status status;

	ACPI_FUNCTION_ENTRY();

	if (!cache || !object) {
		return (AE_BAD_PARAMETER);
	}

	/* If cache is full, just free this object */

	if (cache->current_depth >= cache->max_depth) {
		ACPI_FREE(object);
		ACPI_MEM_TRACKING(cache->total_freed++);
	}

	/* Otherwise put this object back into the cache */

	else {
		status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
		if (ACPI_FAILURE(status)) {
			return (status);
		}

		/* Mark the object as cached */

		ACPI_MEMSET(object, 0xCA, cache->object_size);
		ACPI_SET_DESCRIPTOR_TYPE(object, ACPI_DESC_TYPE_CACHED);

		/* Put the object at the head of the cache list */

		*(ACPI_CAST_INDIRECT_PTR(char,
					 &(((char *)object)[cache->
							    link_offset]))) =
		    cache->list_head;
		cache->list_head = object;
		cache->current_depth++;

		(void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
	}

	return (AE_OK);
}

ACPI_STATUS
AcpiNsInitializeObjects (
    void)
{
    ACPI_STATUS             Status;
    ACPI_INIT_WALK_INFO     Info;


    ACPI_FUNCTION_TRACE (NsInitializeObjects);


    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
        "**** Starting initialization of namespace objects ****\n"));
    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
        "Completing Region/Field/Buffer/Package initialization:\n"));

    /* Set all init info to zero */

    ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));

    /* Walk entire namespace from the supplied root */

    Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
                ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL,
                &Info, NULL);
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
    }

    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
        "    Initialized %u/%u Regions %u/%u Fields %u/%u "
        "Buffers %u/%u Packages (%u nodes)\n",
        Info.OpRegionInit,  Info.OpRegionCount,
        Info.FieldInit,     Info.FieldCount,
        Info.BufferInit,    Info.BufferCount,
        Info.PackageInit,   Info.PackageCount, Info.ObjectCount));

    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
        "%u Control Methods found\n", Info.MethodCount));
    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
        "%u Op Regions found\n", Info.OpRegionCount));

    return_ACPI_STATUS (AE_OK);
}

void *
acpi_ut_acquire_from_cache (
	u32                             list_id)
{
	struct acpi_memory_list         *cache_info;
	void                            *object;


	ACPI_FUNCTION_NAME ("ut_acquire_from_cache");


	cache_info = &acpi_gbl_memory_lists[list_id];

#ifdef ACPI_ENABLE_OBJECT_CACHE

	if (ACPI_FAILURE (acpi_ut_acquire_mutex (ACPI_MTX_CACHES))) {
		return (NULL);
	}

	ACPI_MEM_TRACKING (cache_info->cache_requests++);

	/* Check the cache first */

	if (cache_info->list_head) {
		/* There is an object available, use it */

		object = cache_info->list_head;
		cache_info->list_head = *(ACPI_CAST_INDIRECT_PTR (char, &(((char *) object)[cache_info->link_offset])));

		ACPI_MEM_TRACKING (cache_info->cache_hits++);
		cache_info->cache_depth--;

#ifdef ACPI_DBG_TRACK_ALLOCATIONS
		ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Object %p from %s\n",
			object, acpi_gbl_memory_lists[list_id].list_name));
#endif

		if (ACPI_FAILURE (acpi_ut_release_mutex (ACPI_MTX_CACHES))) {
			return (NULL);
		}

		/* Clear (zero) the previously used Object */

		ACPI_MEMSET (object, 0, cache_info->object_size);
	}

void
AcpiTbInitTableDescriptor (
    ACPI_TABLE_DESC         *TableDesc,
    ACPI_PHYSICAL_ADDRESS   Address,
    UINT8                   Flags,
    ACPI_TABLE_HEADER       *Table)
{

    /*
     * Initialize the table descriptor. Set the pointer to NULL, since the
     * table is not fully mapped at this time.
     */
    ACPI_MEMSET (TableDesc, 0, sizeof (ACPI_TABLE_DESC));
    TableDesc->Address = Address;
    TableDesc->Length = Table->Length;
    TableDesc->Flags = Flags;
    ACPI_MOVE_32_TO_32 (TableDesc->Signature.Ascii, Table->Signature);
}

void
AcpiUtReleaseToCache (
    UINT32                  ListId,
    void                    *Object)
{
    ACPI_MEMORY_LIST        *CacheInfo;


    ACPI_FUNCTION_ENTRY ();


    /* If walk cache is full, just free this wallkstate object */

    CacheInfo = &AcpiGbl_MemoryLists[ListId];
    if (CacheInfo->CacheDepth >= CacheInfo->MaxCacheDepth)
    {
        ACPI_MEM_FREE (Object);
        ACPI_MEM_TRACKING (CacheInfo->TotalFreed++);
    }

    /* Otherwise put this object back into the cache */

    else
    {
        if (ACPI_FAILURE (AcpiUtAcquireMutex (ACPI_MTX_CACHES)))
        {
            return;
        }

        /* Mark the object as cached */

        ACPI_MEMSET (Object, 0xCA, CacheInfo->ObjectSize);
        ACPI_SET_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_CACHED);

        /* Put the object at the head of the cache list */

        * (ACPI_CAST_INDIRECT_PTR (char, &(((char *) Object)[CacheInfo->LinkOffset]))) = CacheInfo->ListHead;
        CacheInfo->ListHead = Object;
        CacheInfo->CacheDepth++;

        (void) AcpiUtReleaseMutex (ACPI_MTX_CACHES);
    }
}

void *
AcpiOsAllocateZeroed (
    ACPI_SIZE               Size)
{
    void                    *Allocation;


    ACPI_FUNCTION_ENTRY ();


    Allocation = AcpiOsAllocate (Size);
    if (Allocation)
    {
        /* Clear the memory block */

        ACPI_MEMSET (Allocation, 0, Size);
    }

    return (Allocation);
}

acpi_status acpi_ns_initialize_objects(void)
{
	acpi_status status;
	struct acpi_init_walk_info info;

	ACPI_FUNCTION_TRACE(ns_initialize_objects);

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "**** Starting initialization of namespace objects ****\n"));
	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
			      "Completing Region/Field/Buffer/Package initialization:"));

	

	ACPI_MEMSET(&info, 0, sizeof(struct acpi_init_walk_info));

	

	status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
				     ACPI_UINT32_MAX, acpi_ns_init_one_object, NULL,
				     &info, NULL);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
	}

	ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
			      "\nInitialized %u/%u Regions %u/%u Fields %u/%u "
			      "Buffers %u/%u Packages (%u nodes)\n",
			      info.op_region_init, info.op_region_count,
			      info.field_init, info.field_count,
			      info.buffer_init, info.buffer_count,
			      info.package_init, info.package_count,
			      info.object_count));

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "%u Control Methods found\n", info.method_count));
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "%u Op Regions found\n", info.op_region_count));

	return_ACPI_STATUS(AE_OK);
}