Beispiel #1
0
static void
acpi_ex_dump_object(union acpi_operand_object *obj_desc,
		    struct acpi_exdump_info *info)
{
	u8 *target;
	char *name;
	u8 count;

	if (!info) {
		acpi_os_printf
		    ("ExDumpObject: Display not implemented for object type %s\n",
		     acpi_ut_get_object_type_name(obj_desc));
		return;
	}

	/* First table entry must contain the table length (# of table entries) */

	count = info->offset;

	while (count) {
		target = ACPI_ADD_PTR(u8, obj_desc, info->offset);
		name = info->name;

		switch (info->opcode) {
		case ACPI_EXD_INIT:
			break;

		case ACPI_EXD_TYPE:
			acpi_ex_out_string("Type",
					   acpi_ut_get_object_type_name
					   (obj_desc));
			break;

		case ACPI_EXD_UINT8:

			acpi_os_printf("%20s : %2.2X\n", name, *target);
			break;

		case ACPI_EXD_UINT16:

			acpi_os_printf("%20s : %4.4X\n", name,
				       ACPI_GET16(target));
			break;

		case ACPI_EXD_UINT32:

			acpi_os_printf("%20s : %8.8X\n", name,
				       ACPI_GET32(target));
			break;

		case ACPI_EXD_UINT64:

			acpi_os_printf("%20s : %8.8X%8.8X\n", "Value",
				       ACPI_FORMAT_UINT64(ACPI_GET64(target)));
			break;

		case ACPI_EXD_POINTER:

			acpi_ex_out_pointer(name,
					    *ACPI_CAST_PTR(void *, target));
			break;

		case ACPI_EXD_ADDRESS:

			acpi_ex_out_address(name,
					    *ACPI_CAST_PTR
					    (acpi_physical_address, target));
			break;

		case ACPI_EXD_STRING:

			acpi_ut_print_string(obj_desc->string.pointer,
					     ACPI_UINT8_MAX);
			acpi_os_printf("\n");
			break;

		case ACPI_EXD_BUFFER:

			ACPI_DUMP_BUFFER(obj_desc->buffer.pointer,
					 obj_desc->buffer.length);
			break;

		case ACPI_EXD_PACKAGE:

			/* Dump the package contents */

			acpi_os_printf("\nPackage Contents:\n");
			acpi_ex_dump_package_obj(obj_desc, 0, 0);
			break;

		case ACPI_EXD_FIELD:

			acpi_ex_dump_object(obj_desc,
					    acpi_ex_dump_field_common);
			break;

		case ACPI_EXD_REFERENCE:

			acpi_ex_out_string("Opcode",
					   (acpi_ps_get_opcode_info
					    (obj_desc->reference.opcode))->
					   name);
			acpi_ex_dump_reference_obj(obj_desc);
			break;

		default:
			acpi_os_printf("**** Invalid table opcode [%X] ****\n",
				       info->opcode);
			return;
		}

		info++;
		count--;
	}
}
Beispiel #2
0
static void
AcpiRsDumpDescriptor (
    void                    *Resource,
    ACPI_RSDUMP_INFO        *Table)
{
    UINT8                   *Target = NULL;
    UINT8                   *PreviousTarget;
    const char              *Name;
    UINT8                   Count;


    /* First table entry must contain the table length (# of table entries) */

    Count = Table->Offset;

    while (Count)
    {
        PreviousTarget = Target;
        Target = ACPI_ADD_PTR (UINT8, Resource, Table->Offset);
        Name = Table->Name;

        switch (Table->Opcode)
        {
        case ACPI_RSD_TITLE:
            /*
             * Optional resource title
             */
            if (Table->Name)
            {
                AcpiOsPrintf ("%s Resource\n", Name);
            }
            break;

        /* Strings */

        case ACPI_RSD_LITERAL:

            AcpiRsOutString (Name, ACPI_CAST_PTR (char, Table->Pointer));
            break;

        case ACPI_RSD_STRING:

            AcpiRsOutString (Name, ACPI_CAST_PTR (char, Target));
            break;

        /* Data items, 8/16/32/64 bit */

        case ACPI_RSD_UINT8:

            if (Table->Pointer)
            {
                AcpiRsOutString (Name, Table->Pointer [*Target]);
            }
            else
            {
                AcpiRsOutInteger8 (Name, ACPI_GET8 (Target));
            }
            break;

        case ACPI_RSD_UINT16:

            AcpiRsOutInteger16 (Name, ACPI_GET16 (Target));
            break;

        case ACPI_RSD_UINT32:

            AcpiRsOutInteger32 (Name, ACPI_GET32 (Target));
            break;

        case ACPI_RSD_UINT64:

            AcpiRsOutInteger64 (Name, ACPI_GET64 (Target));
            break;

        /* Flags: 1-bit and 2-bit flags supported */

        case ACPI_RSD_1BITFLAG:

            AcpiRsOutString (Name, Table->Pointer [*Target & 0x01]);
            break;

        case ACPI_RSD_2BITFLAG:

            AcpiRsOutString (Name, Table->Pointer [*Target & 0x03]);
            break;

        case ACPI_RSD_3BITFLAG:

            AcpiRsOutString (Name, Table->Pointer [*Target & 0x07]);
            break;

        case ACPI_RSD_SHORTLIST:
            /*
             * Short byte list (single line output) for DMA and IRQ resources
             * Note: The list length is obtained from the previous table entry
             */
            if (PreviousTarget)
            {
                AcpiRsOutTitle (Name);
                AcpiRsDumpShortByteList (*PreviousTarget, Target);
            }
            break;

        case ACPI_RSD_SHORTLISTX:
            /*
             * Short byte list (single line output) for GPIO vendor data
             * Note: The list length is obtained from the previous table entry
             */
            if (PreviousTarget)
            {
                AcpiRsOutTitle (Name);
                AcpiRsDumpShortByteList (*PreviousTarget,
                    *(ACPI_CAST_INDIRECT_PTR (UINT8, Target)));
            }
            break;

        case ACPI_RSD_LONGLIST:
            /*
             * Long byte list for Vendor resource data
             * Note: The list length is obtained from the previous table entry
             */
            if (PreviousTarget)
            {
                AcpiRsDumpByteList (ACPI_GET16 (PreviousTarget), Target);
            }
            break;

        case ACPI_RSD_DWORDLIST:
            /*
             * Dword list for Extended Interrupt resources
             * Note: The list length is obtained from the previous table entry
             */
            if (PreviousTarget)
            {
                AcpiRsDumpDwordList (*PreviousTarget,
                    ACPI_CAST_PTR (UINT32, Target));
            }
            break;

        case ACPI_RSD_WORDLIST:
            /*
             * Word list for GPIO Pin Table
             * Note: The list length is obtained from the previous table entry
             */
            if (PreviousTarget)
            {
                AcpiRsDumpWordList (*PreviousTarget,
                    *(ACPI_CAST_INDIRECT_PTR (UINT16, Target)));
            }
            break;

        case ACPI_RSD_ADDRESS:
            /*
             * Common flags for all Address resources
             */
            AcpiRsDumpAddressCommon (ACPI_CAST_PTR (
                ACPI_RESOURCE_DATA, Target));
            break;

        case ACPI_RSD_SOURCE:
            /*
             * Optional ResourceSource for Address resources
             */
            AcpiRsDumpResourceSource (ACPI_CAST_PTR (
                ACPI_RESOURCE_SOURCE, Target));
            break;

        case ACPI_RSD_LABEL:
            /*
             * ResourceLabel
             */
            AcpiRsDumpResourceLabel ("Resource Label", ACPI_CAST_PTR (
                ACPI_RESOURCE_LABEL, Target));
            break;

        case ACPI_RSD_SOURCE_LABEL:
            /*
             * ResourceSourceLabel
             */
            AcpiRsDumpResourceLabel ("Resource Source Label", ACPI_CAST_PTR (
                ACPI_RESOURCE_LABEL, Target));
            break;

        default:

            AcpiOsPrintf ("**** Invalid table opcode [%X] ****\n",
                Table->Opcode);
            return;
        }

        Table++;
        Count--;
    }
}
Beispiel #3
0
static void
acpi_rs_dump_descriptor(void *resource, struct acpi_rsdump_info *table)
{
	u8 *target = NULL;
	u8 *previous_target;
	char *name;
	u8 count;

	/* First table entry must contain the table length (# of table entries) */

	count = table->offset;

	while (count) {
		previous_target = target;
		target = ACPI_ADD_PTR(u8, resource, table->offset);
		name = table->name;

		switch (table->opcode) {
		case ACPI_RSD_TITLE:
			/*
			 * Optional resource title
			 */
			if (table->name) {
				acpi_os_printf("%s Resource\n", name);
			}
			break;

			/* Strings */

		case ACPI_RSD_LITERAL:

			acpi_rs_out_string(name,
					   ACPI_CAST_PTR(char, table->pointer));
			break;

		case ACPI_RSD_STRING:

			acpi_rs_out_string(name, ACPI_CAST_PTR(char, target));
			break;

			/* Data items, 8/16/32/64 bit */

		case ACPI_RSD_UINT8:

			if (table->pointer) {
				acpi_rs_out_string(name, ACPI_CAST_PTR(char,
								       table->
								       pointer
								       [*target]));
			} else {
				acpi_rs_out_integer8(name, ACPI_GET8(target));
			}
			break;

		case ACPI_RSD_UINT16:

			acpi_rs_out_integer16(name, ACPI_GET16(target));
			break;

		case ACPI_RSD_UINT32:

			acpi_rs_out_integer32(name, ACPI_GET32(target));
			break;

		case ACPI_RSD_UINT64:

			acpi_rs_out_integer64(name, ACPI_GET64(target));
			break;

			/* Flags: 1-bit and 2-bit flags supported */

		case ACPI_RSD_1BITFLAG:

			acpi_rs_out_string(name, ACPI_CAST_PTR(char,
							       table->
							       pointer[*target &
								       0x01]));
			break;

		case ACPI_RSD_2BITFLAG:

			acpi_rs_out_string(name, ACPI_CAST_PTR(char,
							       table->
							       pointer[*target &
								       0x03]));
			break;

		case ACPI_RSD_3BITFLAG:

			acpi_rs_out_string(name, ACPI_CAST_PTR(char,
							       table->
							       pointer[*target &
								       0x07]));
			break;

		case ACPI_RSD_SHORTLIST:
			/*
			 * Short byte list (single line output) for DMA and IRQ resources
			 * Note: The list length is obtained from the previous table entry
			 */
			if (previous_target) {
				acpi_rs_out_title(name);
				acpi_rs_dump_short_byte_list(*previous_target,
							     target);
			}
			break;

		case ACPI_RSD_SHORTLISTX:
			/*
			 * Short byte list (single line output) for GPIO vendor data
			 * Note: The list length is obtained from the previous table entry
			 */
			if (previous_target) {
				acpi_rs_out_title(name);
				acpi_rs_dump_short_byte_list(*previous_target,
							     *
							     (ACPI_CAST_INDIRECT_PTR
							      (u8, target)));
			}
			break;

		case ACPI_RSD_LONGLIST:
			/*
			 * Long byte list for Vendor resource data
			 * Note: The list length is obtained from the previous table entry
			 */
			if (previous_target) {
				acpi_rs_dump_byte_list(ACPI_GET16
						       (previous_target),
						       target);
			}
			break;

		case ACPI_RSD_DWORDLIST:
			/*
			 * Dword list for Extended Interrupt resources
			 * Note: The list length is obtained from the previous table entry
			 */
			if (previous_target) {
				acpi_rs_dump_dword_list(*previous_target,
							ACPI_CAST_PTR(u32,
								      target));
			}
			break;

		case ACPI_RSD_WORDLIST:
			/*
			 * Word list for GPIO Pin Table
			 * Note: The list length is obtained from the previous table entry
			 */
			if (previous_target) {
				acpi_rs_dump_word_list(*previous_target,
						       *(ACPI_CAST_INDIRECT_PTR
							 (u16, target)));
			}
			break;

		case ACPI_RSD_ADDRESS:
			/*
			 * Common flags for all Address resources
			 */
			acpi_rs_dump_address_common(ACPI_CAST_PTR
						    (union acpi_resource_data,
						     target));
			break;

		case ACPI_RSD_SOURCE:
			/*
			 * Optional resource_source for Address resources
			 */
			acpi_rs_dump_resource_source(ACPI_CAST_PTR
						     (struct
								   acpi_resource_source,
								   target));
			break;

		default:

			acpi_os_printf("**** Invalid table opcode [%X] ****\n",
				       table->opcode);
			return;
		}
Beispiel #4
0
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_system_memory_space_handler
 *
 * PARAMETERS:  Function            - Read or Write operation
 *              Address             - Where in the space to read or write
 *              bit_width           - Field width in bits (8, 16, or 32)
 *              Value               - Pointer to in or out value
 *              handler_context     - Pointer to Handler's context
 *              region_context      - Pointer to context specific to the
 *                                    accessed region
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Handler for the System Memory address space (Op Region)
 *
 ******************************************************************************/
acpi_status
acpi_ex_system_memory_space_handler(u32 function,
				    acpi_physical_address address,
				    u32 bit_width,
				    u64 *value,
				    void *handler_context, void *region_context)
{
	acpi_status status = AE_OK;
	void *logical_addr_ptr = NULL;
	struct acpi_mem_space_context *mem_info = region_context;
	u32 length;
	acpi_size map_length;
	acpi_size page_boundary_map_length;
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
	u32 remainder;
#endif

	ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);

	/* Validate and translate the bit width */

	switch (bit_width) {
	case 8:
		length = 1;
		break;

	case 16:
		length = 2;
		break;

	case 32:
		length = 4;
		break;

	case 64:
		length = 8;
		break;

	default:
		ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
			    bit_width));
		return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
	}

#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
	/*
	 * Hardware does not support non-aligned data transfers, we must verify
	 * the request.
	 */
	(void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
	if (remainder != 0) {
		return_ACPI_STATUS(AE_AML_ALIGNMENT);
	}
#endif

	/*
	 * Does the request fit into the cached memory mapping?
	 * Is 1) Address below the current mapping? OR
	 *    2) Address beyond the current mapping?
	 */
	if ((address < mem_info->mapped_physical_address) ||
	    (((u64) address + length) > ((u64)
					 mem_info->mapped_physical_address +
					 mem_info->mapped_length))) {
		/*
		 * The request cannot be resolved by the current memory mapping;
		 * Delete the existing mapping and create a new one.
		 */
		if (mem_info->mapped_length) {

			/* Valid mapping, delete it */

			acpi_os_unmap_memory(mem_info->mapped_logical_address,
					     mem_info->mapped_length);
		}

		/*
		 * Attempt to map from the requested address to the end of the region.
		 * However, we will never map more than one page, nor will we cross
		 * a page boundary.
		 */
		map_length = (acpi_size)
		    ((mem_info->address + mem_info->length) - address);

		/*
		 * If mapping the entire remaining portion of the region will cross
		 * a page boundary, just map up to the page boundary, do not cross.
		 * On some systems, crossing a page boundary while mapping regions
		 * can cause warnings if the pages have different attributes
		 * due to resource management
		 */
		page_boundary_map_length =
		    ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address;

		if (!page_boundary_map_length) {
			page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
		}

		if (map_length > page_boundary_map_length) {
			map_length = page_boundary_map_length;
		}

		/* Create a new mapping starting at the address given */

		mem_info->mapped_logical_address = acpi_os_map_memory((acpi_physical_address) address, map_length);
		if (!mem_info->mapped_logical_address) {
			ACPI_ERROR((AE_INFO,
				    "Could not map memory at 0x%8.8X%8.8X, size %u",
				    ACPI_FORMAT_NATIVE_UINT(address),
				    (u32) map_length));
			mem_info->mapped_length = 0;
			return_ACPI_STATUS(AE_NO_MEMORY);
		}

		/* Save the physical address and mapping size */

		mem_info->mapped_physical_address = address;
		mem_info->mapped_length = map_length;
	}

	/*
	 * Generate a logical pointer corresponding to the address we want to
	 * access
	 */
	logical_addr_ptr = mem_info->mapped_logical_address +
	    ((u64) address - (u64) mem_info->mapped_physical_address);

	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
			  "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
			  bit_width, function,
			  ACPI_FORMAT_NATIVE_UINT(address)));

	/*
	 * Perform the memory read or write
	 *
	 * Note: For machines that do not support non-aligned transfers, the target
	 * address was checked for alignment above.  We do not attempt to break the
	 * transfer up into smaller (byte-size) chunks because the AML specifically
	 * asked for a transfer width that the hardware may require.
	 */
	switch (function) {
	case ACPI_READ:

		*value = 0;
		switch (bit_width) {
		case 8:
			*value = (u64) ACPI_GET8(logical_addr_ptr);
			break;

		case 16:
			*value = (u64) ACPI_GET16(logical_addr_ptr);
			break;

		case 32:
			*value = (u64) ACPI_GET32(logical_addr_ptr);
			break;

		case 64:
			*value = (u64) ACPI_GET64(logical_addr_ptr);
			break;

		default:
			/* bit_width was already validated */
			break;
		}
		break;

	case ACPI_WRITE:

		switch (bit_width) {
		case 8:
			ACPI_SET8(logical_addr_ptr) = (u8) * value;
			break;

		case 16:
			ACPI_SET16(logical_addr_ptr) = (u16) * value;
			break;

		case 32:
			ACPI_SET32(logical_addr_ptr) = (u32) * value;
			break;

		case 64:
			ACPI_SET64(logical_addr_ptr) = (u64) * value;
			break;

		default:
			/* bit_width was already validated */
			break;
		}
		break;

	default:
		status = AE_BAD_PARAMETER;
		break;
	}

	return_ACPI_STATUS(status);
}
Beispiel #5
0
ACPI_STATUS
AcpiExSystemMemorySpaceHandler (
    UINT32                  Function,
    ACPI_PHYSICAL_ADDRESS   Address,
    UINT32                  BitWidth,
    UINT64                  *Value,
    void                    *HandlerContext,
    void                    *RegionContext)
{
    ACPI_STATUS             Status = AE_OK;
    void                    *LogicalAddrPtr = NULL;
    ACPI_MEM_SPACE_CONTEXT  *MemInfo = RegionContext;
    UINT32                  Length;
    ACPI_SIZE               MapLength;
    ACPI_SIZE               PageBoundaryMapLength;
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
    UINT32                  Remainder;
#endif


    ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);


    /* Validate and translate the bit width */

    switch (BitWidth)
    {
    case 8:

        Length = 1;
        break;

    case 16:

        Length = 2;
        break;

    case 32:

        Length = 4;
        break;

    case 64:

        Length = 8;
        break;

    default:

        ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %u",
            BitWidth));
        return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
    }

#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
    /*
     * Hardware does not support non-aligned data transfers, we must verify
     * the request.
     */
    (void) AcpiUtShortDivide ((UINT64) Address, Length, NULL, &Remainder);
    if (Remainder != 0)
    {
        return_ACPI_STATUS (AE_AML_ALIGNMENT);
    }
#endif

    /*
     * Does the request fit into the cached memory mapping?
     * Is 1) Address below the current mapping? OR
     *    2) Address beyond the current mapping?
     */
    if ((Address < MemInfo->MappedPhysicalAddress) ||
        (((UINT64) Address + Length) >
            ((UINT64)
            MemInfo->MappedPhysicalAddress + MemInfo->MappedLength)))
    {
        /*
         * The request cannot be resolved by the current memory mapping;
         * Delete the existing mapping and create a new one.
         */
        if (MemInfo->MappedLength)
        {
            /* Valid mapping, delete it */

            AcpiOsUnmapMemory (MemInfo->MappedLogicalAddress,
                MemInfo->MappedLength);
        }

        /*
         * October 2009: Attempt to map from the requested address to the
         * end of the region. However, we will never map more than one
         * page, nor will we cross a page boundary.
         */
        MapLength = (ACPI_SIZE)
            ((MemInfo->Address + MemInfo->Length) - Address);

        /*
         * If mapping the entire remaining portion of the region will cross
         * a page boundary, just map up to the page boundary, do not cross.
         * On some systems, crossing a page boundary while mapping regions
         * can cause warnings if the pages have different attributes
         * due to resource management.
         *
         * This has the added benefit of constraining a single mapping to
         * one page, which is similar to the original code that used a 4k
         * maximum window.
         */
        PageBoundaryMapLength = (ACPI_SIZE)
            (ACPI_ROUND_UP (Address, ACPI_DEFAULT_PAGE_SIZE) - Address);
        if (PageBoundaryMapLength == 0)
        {
            PageBoundaryMapLength = ACPI_DEFAULT_PAGE_SIZE;
        }

        if (MapLength > PageBoundaryMapLength)
        {
            MapLength = PageBoundaryMapLength;
        }

        /* Create a new mapping starting at the address given */

        MemInfo->MappedLogicalAddress = AcpiOsMapMemory (Address, MapLength);
        if (!MemInfo->MappedLogicalAddress)
        {
            ACPI_ERROR ((AE_INFO,
                "Could not map memory at 0x%8.8X%8.8X, size %u",
                ACPI_FORMAT_UINT64 (Address), (UINT32) MapLength));
            MemInfo->MappedLength = 0;
            return_ACPI_STATUS (AE_NO_MEMORY);
        }

        /* Save the physical address and mapping size */

        MemInfo->MappedPhysicalAddress = Address;
        MemInfo->MappedLength = MapLength;
    }

    /*
     * Generate a logical pointer corresponding to the address we want to
     * access
     */
    LogicalAddrPtr = MemInfo->MappedLogicalAddress +
        ((UINT64) Address - (UINT64) MemInfo->MappedPhysicalAddress);

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
        "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
        BitWidth, Function, ACPI_FORMAT_UINT64 (Address)));

    /*
     * Perform the memory read or write
     *
     * Note: For machines that do not support non-aligned transfers, the target
     * address was checked for alignment above. We do not attempt to break the
     * transfer up into smaller (byte-size) chunks because the AML specifically
     * asked for a transfer width that the hardware may require.
     */
    switch (Function)
    {
    case ACPI_READ:

        *Value = 0;
        switch (BitWidth)
        {
        case 8:

            *Value = (UINT64) ACPI_GET8 (LogicalAddrPtr);
            break;

        case 16:

            *Value = (UINT64) ACPI_GET16 (LogicalAddrPtr);
            break;

        case 32:

            *Value = (UINT64) ACPI_GET32 (LogicalAddrPtr);
            break;

        case 64:

            *Value = (UINT64) ACPI_GET64 (LogicalAddrPtr);
            break;

        default:

            /* BitWidth was already validated */

            break;
        }
        break;

    case ACPI_WRITE:

        switch (BitWidth)
        {
        case 8:

            ACPI_SET8 (LogicalAddrPtr, *Value);
            break;

        case 16:

            ACPI_SET16 (LogicalAddrPtr, *Value);
            break;

        case 32:

            ACPI_SET32 (LogicalAddrPtr, *Value);
            break;

        case 64:

            ACPI_SET64 (LogicalAddrPtr, *Value);
            break;

        default:

            /* BitWidth was already validated */

            break;
        }
        break;

    default:

        Status = AE_BAD_PARAMETER;
        break;
    }

    return_ACPI_STATUS (Status);
}
Beispiel #6
0
/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_system_memory_space_handler
 *
 * PARAMETERS:  Function            - Read or Write operation
 *              Address             - Where in the space to read or write
 *              bit_width           - Field width in bits (8, 16, or 32)
 *              Value               - Pointer to in or out value
 *              handler_context     - Pointer to Handler's context
 *              region_context      - Pointer to context specific to the
 *                                    accessed region
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Handler for the System Memory address space (Op Region)
 *
 ******************************************************************************/
acpi_status
acpi_ex_system_memory_space_handler(u32 function,
				    acpi_physical_address address,
				    u32 bit_width,
				    acpi_integer * value,
				    void *handler_context, void *region_context)
{
	acpi_status status = AE_OK;
	void *logical_addr_ptr = NULL;
	struct acpi_mem_space_context *mem_info = region_context;
	u32 length;
	acpi_size window_size;
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
	u32 remainder;
#endif

	ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);

	/* Validate and translate the bit width */

	switch (bit_width) {
	case 8:
		length = 1;
		break;

	case 16:
		length = 2;
		break;

	case 32:
		length = 4;
		break;

	case 64:
		length = 8;
		break;

	default:
		ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %d",
			    bit_width));
		return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
	}

#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
	/*
	 * Hardware does not support non-aligned data transfers, we must verify
	 * the request.
	 */
	(void)acpi_ut_short_divide((acpi_integer) address, length, NULL,
				   &remainder);
	if (remainder != 0) {
		return_ACPI_STATUS(AE_AML_ALIGNMENT);
	}
#endif

	/*
	 * Does the request fit into the cached memory mapping?
	 * Is 1) Address below the current mapping? OR
	 *    2) Address beyond the current mapping?
	 */
	if ((address < mem_info->mapped_physical_address) ||
	    (((acpi_integer) address + length) > ((acpi_integer)
						  mem_info->
						  mapped_physical_address +
						  mem_info->mapped_length))) {
		/*
		 * The request cannot be resolved by the current memory mapping;
		 * Delete the existing mapping and create a new one.
		 */
		if (mem_info->mapped_length) {

			/* Valid mapping, delete it */

			acpi_os_unmap_memory(mem_info->mapped_logical_address,
					     mem_info->mapped_length);
		}

		/*
		 * Don't attempt to map memory beyond the end of the region, and
		 * constrain the maximum mapping size to something reasonable.
		 */
		window_size = (acpi_size)
		    ((mem_info->address + mem_info->length) - address);

		if (window_size > ACPI_SYSMEM_REGION_WINDOW_SIZE) {
			window_size = ACPI_SYSMEM_REGION_WINDOW_SIZE;
		}

		/* Create a new mapping starting at the address given */

		mem_info->mapped_logical_address =
		    acpi_os_map_memory((acpi_native_uint) address, window_size);
		if (!mem_info->mapped_logical_address) {
			ACPI_ERROR((AE_INFO,
				    "Could not map memory at %8.8X%8.8X, size %X",
				    ACPI_FORMAT_UINT64(address),
				    (u32) window_size));
			mem_info->mapped_length = 0;
			return_ACPI_STATUS(AE_NO_MEMORY);
		}

		/* Save the physical address and mapping size */

		mem_info->mapped_physical_address = address;
		mem_info->mapped_length = window_size;
	}

	/*
	 * Generate a logical pointer corresponding to the address we want to
	 * access
	 */
	logical_addr_ptr = mem_info->mapped_logical_address +
	    ((acpi_integer) address -
	     (acpi_integer) mem_info->mapped_physical_address);

	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
			  "System-Memory (width %d) R/W %d Address=%8.8X%8.8X\n",
			  bit_width, function, ACPI_FORMAT_UINT64(address)));

	/*
	 * Perform the memory read or write
	 *
	 * Note: For machines that do not support non-aligned transfers, the target
	 * address was checked for alignment above.  We do not attempt to break the
	 * transfer up into smaller (byte-size) chunks because the AML specifically
	 * asked for a transfer width that the hardware may require.
	 */
	switch (function) {
	case ACPI_READ:

		*value = 0;
		switch (bit_width) {
		case 8:
			*value = (acpi_integer) ACPI_GET8(logical_addr_ptr);
			break;

		case 16:
			*value = (acpi_integer) ACPI_GET16(logical_addr_ptr);
			break;

		case 32:
			*value = (acpi_integer) ACPI_GET32(logical_addr_ptr);
			break;

		case 64:
			*value = (acpi_integer) ACPI_GET64(logical_addr_ptr);
			break;

		default:
			/* bit_width was already validated */
			break;
		}
		break;

	case ACPI_WRITE:

		switch (bit_width) {
		case 8:
			ACPI_SET8(logical_addr_ptr) = (u8) * value;
			break;

		case 16:
			ACPI_SET16(logical_addr_ptr) = (u16) * value;
			break;

		case 32:
			ACPI_SET32(logical_addr_ptr) = (u32) * value;
			break;

		case 64:
			ACPI_SET64(logical_addr_ptr) = (u64) * value;
			break;

		default:
			/* bit_width was already validated */
			break;
		}
		break;

	default:
		status = AE_BAD_PARAMETER;
		break;
	}

	return_ACPI_STATUS(status);
}
ACPI_STATUS
AcpiExSystemMemorySpaceHandler (
    UINT32                  Function,
    ACPI_PHYSICAL_ADDRESS   Address,
    UINT32                  BitWidth,
    ACPI_INTEGER            *Value,
    void                    *HandlerContext,
    void                    *RegionContext)
{
    ACPI_STATUS             Status = AE_OK;
    void                    *LogicalAddrPtr = NULL;
    ACPI_MEM_SPACE_CONTEXT  *MemInfo = RegionContext;
    UINT32                  Length;
    ACPI_SIZE               WindowSize;
#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
    UINT32                  Remainder;
#endif


    ACPI_FUNCTION_TRACE (ExSystemMemorySpaceHandler);


    /* Validate and translate the bit width */

    switch (BitWidth)
    {
    case 8:
        Length = 1;
        break;

    case 16:
        Length = 2;
        break;

    case 32:
        Length = 4;
        break;

    case 64:
        Length = 8;
        break;

    default:
        ACPI_ERROR ((AE_INFO, "Invalid SystemMemory width %d",
            BitWidth));
        return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
    }

#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
    /*
     * Hardware does not support non-aligned data transfers, we must verify
     * the request.
     */
    (void) AcpiUtShortDivide ((ACPI_INTEGER) Address, Length, NULL, &Remainder);
    if (Remainder != 0)
    {
        return_ACPI_STATUS (AE_AML_ALIGNMENT);
    }
#endif

    /*
     * Does the request fit into the cached memory mapping?
     * Is 1) Address below the current mapping? OR
     *    2) Address beyond the current mapping?
     */
    if ((Address < MemInfo->MappedPhysicalAddress) ||
        (((ACPI_INTEGER) Address + Length) >
            ((ACPI_INTEGER)
            MemInfo->MappedPhysicalAddress + MemInfo->MappedLength)))
    {
        /*
         * The request cannot be resolved by the current memory mapping;
         * Delete the existing mapping and create a new one.
         */
        if (MemInfo->MappedLength)
        {
            /* Valid mapping, delete it */

            AcpiOsUnmapMemory (MemInfo->MappedLogicalAddress,
                MemInfo->MappedLength);
        }

        /*
         * Don't attempt to map memory beyond the end of the region, and
         * constrain the maximum mapping size to something reasonable.
         */
        WindowSize = (ACPI_SIZE)
            ((MemInfo->Address + MemInfo->Length) - Address);

        if (WindowSize > ACPI_SYSMEM_REGION_WINDOW_SIZE)
        {
            WindowSize = ACPI_SYSMEM_REGION_WINDOW_SIZE;
        }

        /* Create a new mapping starting at the address given */

        MemInfo->MappedLogicalAddress = AcpiOsMapMemory (
            (ACPI_PHYSICAL_ADDRESS) Address, WindowSize);
        if (!MemInfo->MappedLogicalAddress)
        {
            ACPI_ERROR ((AE_INFO,
                "Could not map memory at %8.8X%8.8X, size %X",
                ACPI_FORMAT_NATIVE_UINT (Address), (UINT32) WindowSize));
            MemInfo->MappedLength = 0;
            return_ACPI_STATUS (AE_NO_MEMORY);
        }

        /* Save the physical address and mapping size */

        MemInfo->MappedPhysicalAddress = Address;
        MemInfo->MappedLength = WindowSize;
    }

    /*
     * Generate a logical pointer corresponding to the address we want to
     * access
     */
    LogicalAddrPtr = MemInfo->MappedLogicalAddress +
        ((ACPI_INTEGER) Address - (ACPI_INTEGER) MemInfo->MappedPhysicalAddress);

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
        "System-Memory (width %d) R/W %d Address=%8.8X%8.8X\n",
        BitWidth, Function, ACPI_FORMAT_NATIVE_UINT (Address)));

    /*
     * Perform the memory read or write
     *
     * Note: For machines that do not support non-aligned transfers, the target
     * address was checked for alignment above.  We do not attempt to break the
     * transfer up into smaller (byte-size) chunks because the AML specifically
     * asked for a transfer width that the hardware may require.
     */
    switch (Function)
    {
    case ACPI_READ:

        *Value = 0;
        switch (BitWidth)
        {
        case 8:
            *Value = (ACPI_INTEGER) ACPI_GET8 (LogicalAddrPtr);
            break;

        case 16:
            *Value = (ACPI_INTEGER) ACPI_GET16 (LogicalAddrPtr);
            break;

        case 32:
            *Value = (ACPI_INTEGER) ACPI_GET32 (LogicalAddrPtr);
            break;

        case 64:
            *Value = (ACPI_INTEGER) ACPI_GET64 (LogicalAddrPtr);
            break;

        default:
            /* BitWidth was already validated */
            break;
        }
        break;

    case ACPI_WRITE:

        switch (BitWidth)
        {
        case 8:
            ACPI_SET8 (LogicalAddrPtr) = (UINT8) *Value;
            break;

        case 16:
            ACPI_SET16 (LogicalAddrPtr) = (UINT16) *Value;
            break;

        case 32:
            ACPI_SET32 ( LogicalAddrPtr) = (UINT32) *Value;
            break;

        case 64:
            ACPI_SET64 (LogicalAddrPtr) = (UINT64) *Value;
            break;

        default:
            /* BitWidth was already validated */
            break;
        }
        break;

    default:
        Status = AE_BAD_PARAMETER;
        break;
    }

    return_ACPI_STATUS (Status);
}