[linux.git] / drivers / acpi / acpica / exregion.c

/******************************************************************************
 *
 * Module Name: exregion - ACPI default op_region (address space) handlers
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2016, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "acinterp.h"

#define _COMPONENT          ACPI_EXECUTER
ACPI_MODULE_NAME("exregion")

/*******************************************************************************
 *
 * 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);
		}

		/*
		 * 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.
		 */
		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.
		 *
		 * 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.
		 */
		page_boundary_map_length = (acpi_size)
		    (ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address);
		if (page_boundary_map_length == 0) {
			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(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_UINT64(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_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 = (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, *value);
			break;

		case 16:

			ACPI_SET16(logical_addr_ptr, *value);
			break;

		case 32:

			ACPI_SET32(logical_addr_ptr, *value);
			break;

		case 64:

			ACPI_SET64(logical_addr_ptr, *value);
			break;

		default:

			/* bit_width was already validated */

			break;
		}
		break;

	default:

		status = AE_BAD_PARAMETER;
		break;
	}

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_system_io_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 IO address space (Op Region)
 *
 ******************************************************************************/

acpi_status
acpi_ex_system_io_space_handler(u32 function,
				acpi_physical_address address,
				u32 bit_width,
				u64 *value,
				void *handler_context, void *region_context)
{
	acpi_status status = AE_OK;
	u32 value32;

	ACPI_FUNCTION_TRACE(ex_system_io_space_handler);

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

	/* Decode the function parameter */

	switch (function) {
	case ACPI_READ:

		status = acpi_hw_read_port((acpi_io_address) address,
					   &value32, bit_width);
		*value = value32;
		break;

	case ACPI_WRITE:

		status = acpi_hw_write_port((acpi_io_address) address,
					    (u32) * value, bit_width);
		break;

	default:

		status = AE_BAD_PARAMETER;
		break;
	}

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_pci_config_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 PCI Config address space (Op Region)
 *
 ******************************************************************************/

acpi_status
acpi_ex_pci_config_space_handler(u32 function,
				 acpi_physical_address address,
				 u32 bit_width,
				 u64 *value,
				 void *handler_context, void *region_context)
{
	acpi_status status = AE_OK;
	struct acpi_pci_id *pci_id;
	u16 pci_register;

	ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);

	/*
	 *  The arguments to acpi_os(Read|Write)pci_configuration are:
	 *
	 *  pci_segment is the PCI bus segment range 0-31
	 *  pci_bus     is the PCI bus number range 0-255
	 *  pci_device  is the PCI device number range 0-31
	 *  pci_function is the PCI device function number
	 *  pci_register is the Config space register range 0-255 bytes
	 *
	 *  value - input value for write, output address for read
	 *
	 */
	pci_id = (struct acpi_pci_id *)region_context;
	pci_register = (u16) (u32) address;

	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
			  "Pci-Config %u (%u) Seg(%04x) Bus(%04x) "
			  "Dev(%04x) Func(%04x) Reg(%04x)\n",
			  function, bit_width, pci_id->segment, pci_id->bus,
			  pci_id->device, pci_id->function, pci_register));

	switch (function) {
	case ACPI_READ:

		*value = 0;
		status =
		    acpi_os_read_pci_configuration(pci_id, pci_register, value,
						   bit_width);
		break;

	case ACPI_WRITE:

		status =
		    acpi_os_write_pci_configuration(pci_id, pci_register,
						    *value, bit_width);
		break;

	default:

		status = AE_BAD_PARAMETER;
		break;
	}

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_cmos_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 CMOS address space (Op Region)
 *
 ******************************************************************************/

acpi_status
acpi_ex_cmos_space_handler(u32 function,
			   acpi_physical_address address,
			   u32 bit_width,
			   u64 *value,
			   void *handler_context, void *region_context)
{
	acpi_status status = AE_OK;

	ACPI_FUNCTION_TRACE(ex_cmos_space_handler);

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_pci_bar_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 PCI bar_target address space (Op Region)
 *
 ******************************************************************************/

acpi_status
acpi_ex_pci_bar_space_handler(u32 function,
			      acpi_physical_address address,
			      u32 bit_width,
			      u64 *value,
			      void *handler_context, void *region_context)
{
	acpi_status status = AE_OK;

	ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);

	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_data_table_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 Data Table address space (Op Region)
 *
 ******************************************************************************/

acpi_status
acpi_ex_data_table_space_handler(u32 function,
				 acpi_physical_address address,
				 u32 bit_width,
				 u64 *value,
				 void *handler_context, void *region_context)
{
	ACPI_FUNCTION_TRACE(ex_data_table_space_handler);

	/*
	 * Perform the memory read or write. The bit_width was already
	 * validated.
	 */
	switch (function) {
	case ACPI_READ:

		memcpy(ACPI_CAST_PTR(char, value),
		       ACPI_PHYSADDR_TO_PTR(address), ACPI_DIV_8(bit_width));
		break;

	case ACPI_WRITE:

		memcpy(ACPI_PHYSADDR_TO_PTR(address),
		       ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
		break;

	default:

		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	return_ACPI_STATUS(AE_OK);
}
Commit	Line	Data
1da177e4 LT	1	/******************************************************************************
	2	*
	3	* Module Name: exregion - ACPI default op_region (address space) handlers
	4	*
	5	*****************************************************************************/
	6
	7	/*
c8100dc4	8	* Copyright (C) 2000 - 2016, Intel Corp.
1da177e4 LT	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
1da177e4	44	#include <acpi/acpi.h>
e2f7a777 LB	45	#include "accommon.h"
e2f7a777 LB	46	#include "acinterp.h"
1da177e4	47
1da177e4	48	#define _COMPONENT ACPI_EXECUTER
4be44fcd	49	ACPI_MODULE_NAME("exregion")
1da177e4 LT	50
	51	/*******************************************************************************
	52	*
	53	* FUNCTION: acpi_ex_system_memory_space_handler
	54	*
ba494bee BM	55	* PARAMETERS: function - Read or Write operation
ba494bee BM	56	* address - Where in the space to read or write
1da177e4	57	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	58	* value - Pointer to in or out value
1da177e4 LT	59	* handler_context - Pointer to Handler's context
	60	* region_context - Pointer to context specific to the
	61	* accessed region
	62	*
	63	* RETURN: Status
	64	*
	65	* DESCRIPTION: Handler for the System Memory address space (Op Region)
	66	*
	67	******************************************************************************/
1da177e4	68	acpi_status
4be44fcd LB	69	acpi_ex_system_memory_space_handler(u32 function,
	70	acpi_physical_address address,
	71	u32 bit_width,
5df7e6cb	72	u64 *value,
4be44fcd	73	void handler_context, void region_context)
1da177e4	74	{
4be44fcd LB	75	acpi_status status = AE_OK;
	76	void *logical_addr_ptr = NULL;
	77	struct acpi_mem_space_context *mem_info = region_context;
	78	u32 length;
d410ee51 BM	79	acpi_size map_length;
d410ee51 BM	80	acpi_size page_boundary_map_length;
0897831b	81	#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
4be44fcd	82	u32 remainder;
1da177e4 LT	83	#endif
1da177e4 LT	84
b229cf92	85	ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
1da177e4 LT	86
	87	/* Validate and translate the bit width */
	88
	89	switch (bit_width) {
	90	case 8:
1d1ea1b7	91
1da177e4 LT	92	length = 1;
	93	break;
	94
	95	case 16:
1d1ea1b7	96
1da177e4 LT	97	length = 2;
	98	break;
	99
	100	case 32:
1d1ea1b7	101
1da177e4 LT	102	length = 4;
	103	break;
	104
	105	case 64:
1d1ea1b7	106
1da177e4 LT	107	length = 8;
	108	break;
	109
	110	default:
1d1ea1b7	111
f6a22b0b	112	ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
b8e4d893	113	bit_width));
4be44fcd	114	return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
1da177e4 LT	115	}
1da177e4 LT	116
0897831b	117	#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
1da177e4 LT	118	/*
	119	* Hardware does not support non-aligned data transfers, we must verify
	120	* the request.
	121	*/
5df7e6cb	122	(void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
1da177e4	123	if (remainder != 0) {
4be44fcd	124	return_ACPI_STATUS(AE_AML_ALIGNMENT);
1da177e4 LT	125	}
	126	#endif
	127
	128	/*
	129	* Does the request fit into the cached memory mapping?
	130	* Is 1) Address below the current mapping? OR
	131	* 2) Address beyond the current mapping?
	132	*/
	133	if ((address < mem_info->mapped_physical_address) \|\|
5df7e6cb BM	134	(((u64) address + length) > ((u64)
	135	mem_info->mapped_physical_address +
	136	mem_info->mapped_length))) {
1da177e4 LT	137	/*
	138	* The request cannot be resolved by the current memory mapping;
	139	* Delete the existing mapping and create a new one.
	140	*/
	141	if (mem_info->mapped_length) {
52fc0b02	142
1da177e4 LT	143	/* Valid mapping, delete it */
1da177e4 LT	144
4be44fcd LB	145	acpi_os_unmap_memory(mem_info->mapped_logical_address,
4be44fcd LB	146	mem_info->mapped_length);
1da177e4 LT	147	}
	148
	149	/*
75c8044f LZ	150	* October 2009: Attempt to map from the requested address to the
	151	* end of the region. However, we will never map more than one
	152	* page, nor will we cross a page boundary.
1da177e4	153	*/
d410ee51	154	map_length = (acpi_size)
4be44fcd	155	((mem_info->address + mem_info->length) - address);
44f6c012	156
d410ee51 BM	157	/*
	158	* If mapping the entire remaining portion of the region will cross
	159	* a page boundary, just map up to the page boundary, do not cross.
	160	* On some systems, crossing a page boundary while mapping regions
	161	* can cause warnings if the pages have different attributes
75c8044f LZ	162	* due to resource management.
	163	*
	164	* This has the added benefit of constraining a single mapping to
	165	* one page, which is similar to the original code that used a 4k
	166	* maximum window.
d410ee51	167	*/
938ed102 BM	168	page_boundary_map_length = (acpi_size)
938ed102 BM	169	(ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address);
739dcbb9	170	if (page_boundary_map_length == 0) {
d410ee51 BM	171	page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
	172	}
	173
	174	if (map_length > page_boundary_map_length) {
	175	map_length = page_boundary_map_length;
1da177e4 LT	176	}
	177
	178	/* Create a new mapping starting at the address given */
	179
ea284925 LZ	180	mem_info->mapped_logical_address =
ea284925 LZ	181	acpi_os_map_memory(address, map_length);
f3d2e786	182	if (!mem_info->mapped_logical_address) {
b8e4d893	183	ACPI_ERROR((AE_INFO,
f6a22b0b	184	"Could not map memory at 0x%8.8X%8.8X, size %u",
1d0a0b2f	185	ACPI_FORMAT_UINT64(address),
18ae9021	186	(u32)map_length));
1da177e4	187	mem_info->mapped_length = 0;
f3d2e786	188	return_ACPI_STATUS(AE_NO_MEMORY);
1da177e4 LT	189	}
	190
	191	/* Save the physical address and mapping size */
	192
	193	mem_info->mapped_physical_address = address;
d410ee51	194	mem_info->mapped_length = map_length;
1da177e4 LT	195	}
	196
	197	/*
	198	* Generate a logical pointer corresponding to the address we want to
	199	* access
	200	*/
	201	logical_addr_ptr = mem_info->mapped_logical_address +
5df7e6cb	202	((u64) address - (u64) mem_info->mapped_physical_address);
4be44fcd LB	203
4be44fcd LB	204	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
b27d6597	205	"System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
1d0a0b2f	206	bit_width, function, ACPI_FORMAT_UINT64(address)));
4be44fcd LB	207
	208	/*
	209	* Perform the memory read or write
	210	*
	211	* Note: For machines that do not support non-aligned transfers, the target
73a3090a	212	* address was checked for alignment above. We do not attempt to break the
4be44fcd LB	213	* transfer up into smaller (byte-size) chunks because the AML specifically
	214	* asked for a transfer width that the hardware may require.
	215	*/
1da177e4 LT	216	switch (function) {
	217	case ACPI_READ:
	218
	219	*value = 0;
	220	switch (bit_width) {
	221	case 8:
1d1ea1b7 CG	222
1d1ea1b7 CG	223	*value = (u64)ACPI_GET8(logical_addr_ptr);
1da177e4 LT	224	break;
	225
	226	case 16:
1d1ea1b7 CG	227
1d1ea1b7 CG	228	*value = (u64)ACPI_GET16(logical_addr_ptr);
1da177e4 LT	229	break;
	230
	231	case 32:
1d1ea1b7 CG	232
1d1ea1b7 CG	233	*value = (u64)ACPI_GET32(logical_addr_ptr);
1da177e4 LT	234	break;
1da177e4 LT	235
1da177e4	236	case 64:
1d1ea1b7 CG	237
1d1ea1b7 CG	238	*value = (u64)ACPI_GET64(logical_addr_ptr);
1da177e4	239	break;
59fa8505	240
1da177e4	241	default:
1d1ea1b7	242
1da177e4	243	/* bit_width was already validated */
1d1ea1b7	244
1da177e4 LT	245	break;
	246	}
	247	break;
	248
	249	case ACPI_WRITE:
	250
	251	switch (bit_width) {
	252	case 8:
1d1ea1b7	253
57bf6aef	254	ACPI_SET8(logical_addr_ptr, *value);
1da177e4 LT	255	break;
	256
	257	case 16:
1d1ea1b7	258
57bf6aef	259	ACPI_SET16(logical_addr_ptr, *value);
1da177e4 LT	260	break;
	261
	262	case 32:
1d1ea1b7	263
57bf6aef	264	ACPI_SET32(logical_addr_ptr, *value);
1da177e4 LT	265	break;
1da177e4 LT	266
1da177e4	267	case 64:
1d1ea1b7	268
57bf6aef	269	ACPI_SET64(logical_addr_ptr, *value);
1da177e4	270	break;
1da177e4 LT	271
1da177e4 LT	272	default:
1d1ea1b7	273
1da177e4	274	/* bit_width was already validated */
1d1ea1b7	275
1da177e4 LT	276	break;
	277	}
	278	break;
	279
	280	default:
1d1ea1b7	281
1da177e4 LT	282	status = AE_BAD_PARAMETER;
	283	break;
	284	}
	285
4be44fcd	286	return_ACPI_STATUS(status);
1da177e4 LT	287	}
1da177e4 LT	288
1da177e4 LT	289	/*******************************************************************************
	290	*
	291	* FUNCTION: acpi_ex_system_io_space_handler
	292	*
ba494bee BM	293	* PARAMETERS: function - Read or Write operation
ba494bee BM	294	* address - Where in the space to read or write
1da177e4	295	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	296	* value - Pointer to in or out value
1da177e4 LT	297	* handler_context - Pointer to Handler's context
	298	* region_context - Pointer to context specific to the
	299	* accessed region
	300	*
	301	* RETURN: Status
	302	*
	303	* DESCRIPTION: Handler for the System IO address space (Op Region)
	304	*
	305	******************************************************************************/
	306
	307	acpi_status
4be44fcd LB	308	acpi_ex_system_io_space_handler(u32 function,
	309	acpi_physical_address address,
	310	u32 bit_width,
5df7e6cb	311	u64 *value,
4be44fcd	312	void handler_context, void region_context)
1da177e4	313	{
4be44fcd LB	314	acpi_status status = AE_OK;
4be44fcd LB	315	u32 value32;
1da177e4	316
b229cf92	317	ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
1da177e4	318
4be44fcd	319	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
b27d6597	320	"System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
1d0a0b2f	321	bit_width, function, ACPI_FORMAT_UINT64(address)));
1da177e4 LT	322
	323	/* Decode the function parameter */
	324
	325	switch (function) {
	326	case ACPI_READ:
	327
7f071903	328	status = acpi_hw_read_port((acpi_io_address) address,
4be44fcd	329	&value32, bit_width);
1da177e4 LT	330	*value = value32;
	331	break;
	332
	333	case ACPI_WRITE:
	334
7f071903	335	status = acpi_hw_write_port((acpi_io_address) address,
4be44fcd	336	(u32) * value, bit_width);
1da177e4 LT	337	break;
	338
	339	default:
1d1ea1b7	340
1da177e4 LT	341	status = AE_BAD_PARAMETER;
	342	break;
	343	}
	344
4be44fcd	345	return_ACPI_STATUS(status);
1da177e4 LT	346	}
1da177e4 LT	347
1da177e4 LT	348	/*******************************************************************************
	349	*
	350	* FUNCTION: acpi_ex_pci_config_space_handler
	351	*
ba494bee BM	352	* PARAMETERS: function - Read or Write operation
ba494bee BM	353	* address - Where in the space to read or write
1da177e4	354	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	355	* value - Pointer to in or out value
1da177e4 LT	356	* handler_context - Pointer to Handler's context
	357	* region_context - Pointer to context specific to the
	358	* accessed region
	359	*
	360	* RETURN: Status
	361	*
	362	* DESCRIPTION: Handler for the PCI Config address space (Op Region)
	363	*
	364	******************************************************************************/
	365
	366	acpi_status
4be44fcd LB	367	acpi_ex_pci_config_space_handler(u32 function,
	368	acpi_physical_address address,
	369	u32 bit_width,
5df7e6cb	370	u64 *value,
4be44fcd	371	void handler_context, void region_context)
1da177e4	372	{
4be44fcd LB	373	acpi_status status = AE_OK;
	374	struct acpi_pci_id *pci_id;
	375	u16 pci_register;
1da177e4	376
b229cf92	377	ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
1da177e4 LT	378
	379	/*
	380	* The arguments to acpi_os(Read\|Write)pci_configuration are:
	381	*
	382	* pci_segment is the PCI bus segment range 0-31
	383	* pci_bus is the PCI bus number range 0-255
	384	* pci_device is the PCI device number range 0-31
	385	* pci_function is the PCI device function number
	386	* pci_register is the Config space register range 0-255 bytes
	387	*
ba494bee	388	* value - input value for write, output address for read
1da177e4 LT	389	*
1da177e4 LT	390	*/
4be44fcd	391	pci_id = (struct acpi_pci_id *)region_context;
1da177e4 LT	392	pci_register = (u16) (u32) address;
1da177e4 LT	393
4be44fcd	394	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1fad8738 BM	395	"Pci-Config %u (%u) Seg(%04x) Bus(%04x) "
1fad8738 BM	396	"Dev(%04x) Func(%04x) Reg(%04x)\n",
4be44fcd LB	397	function, bit_width, pci_id->segment, pci_id->bus,
4be44fcd LB	398	pci_id->device, pci_id->function, pci_register));
1da177e4 LT	399
	400	switch (function) {
	401	case ACPI_READ:
	402
bb42cc22	403	*value = 0;
1fad8738 BM	404	status =
	405	acpi_os_read_pci_configuration(pci_id, pci_register, value,
	406	bit_width);
1da177e4 LT	407	break;
	408
	409	case ACPI_WRITE:
	410
1fad8738 BM	411	status =
	412	acpi_os_write_pci_configuration(pci_id, pci_register,
	413	*value, bit_width);
1da177e4 LT	414	break;
	415
	416	default:
	417
	418	status = AE_BAD_PARAMETER;
	419	break;
	420	}
	421
4be44fcd	422	return_ACPI_STATUS(status);
1da177e4 LT	423	}
1da177e4 LT	424
1da177e4 LT	425	/*******************************************************************************
	426	*
	427	* FUNCTION: acpi_ex_cmos_space_handler
	428	*
ba494bee BM	429	* PARAMETERS: function - Read or Write operation
ba494bee BM	430	* address - Where in the space to read or write
1da177e4	431	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	432	* value - Pointer to in or out value
1da177e4 LT	433	* handler_context - Pointer to Handler's context
	434	* region_context - Pointer to context specific to the
	435	* accessed region
	436	*
	437	* RETURN: Status
	438	*
	439	* DESCRIPTION: Handler for the CMOS address space (Op Region)
	440	*
	441	******************************************************************************/
	442
	443	acpi_status
4be44fcd LB	444	acpi_ex_cmos_space_handler(u32 function,
	445	acpi_physical_address address,
	446	u32 bit_width,
5df7e6cb	447	u64 *value,
4be44fcd	448	void handler_context, void region_context)
1da177e4	449	{
4be44fcd	450	acpi_status status = AE_OK;
1da177e4	451
b229cf92	452	ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
1da177e4	453
4be44fcd	454	return_ACPI_STATUS(status);
1da177e4 LT	455	}
1da177e4 LT	456
1da177e4 LT	457	/*******************************************************************************
	458	*
	459	* FUNCTION: acpi_ex_pci_bar_space_handler
	460	*
ba494bee BM	461	* PARAMETERS: function - Read or Write operation
ba494bee BM	462	* address - Where in the space to read or write
1da177e4	463	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	464	* value - Pointer to in or out value
1da177e4 LT	465	* handler_context - Pointer to Handler's context
	466	* region_context - Pointer to context specific to the
	467	* accessed region
	468	*
	469	* RETURN: Status
	470	*
	471	* DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
	472	*
	473	******************************************************************************/
	474
	475	acpi_status
4be44fcd LB	476	acpi_ex_pci_bar_space_handler(u32 function,
	477	acpi_physical_address address,
	478	u32 bit_width,
5df7e6cb	479	u64 *value,
4be44fcd	480	void handler_context, void region_context)
1da177e4	481	{
4be44fcd	482	acpi_status status = AE_OK;
1da177e4	483
b229cf92	484	ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
1da177e4	485
4be44fcd	486	return_ACPI_STATUS(status);
1da177e4 LT	487	}
1da177e4 LT	488
1da177e4 LT	489	/*******************************************************************************
	490	*
	491	* FUNCTION: acpi_ex_data_table_space_handler
	492	*
ba494bee BM	493	* PARAMETERS: function - Read or Write operation
ba494bee BM	494	* address - Where in the space to read or write
1da177e4	495	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	496	* value - Pointer to in or out value
1da177e4 LT	497	* handler_context - Pointer to Handler's context
	498	* region_context - Pointer to context specific to the
	499	* accessed region
	500	*
	501	* RETURN: Status
	502	*
	503	* DESCRIPTION: Handler for the Data Table address space (Op Region)
	504	*
	505	******************************************************************************/
	506
	507	acpi_status
4be44fcd LB	508	acpi_ex_data_table_space_handler(u32 function,
	509	acpi_physical_address address,
	510	u32 bit_width,
5df7e6cb	511	u64 *value,
4be44fcd	512	void handler_context, void region_context)
1da177e4	513	{
b229cf92	514	ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
1da177e4	515
c1637e9c BM	516	/*
	517	* Perform the memory read or write. The bit_width was already
	518	* validated.
	519	*/
1da177e4 LT	520	switch (function) {
	521	case ACPI_READ:
	522
4fa4616e BM	523	memcpy(ACPI_CAST_PTR(char, value),
4fa4616e BM	524	ACPI_PHYSADDR_TO_PTR(address), ACPI_DIV_8(bit_width));
1da177e4 LT	525	break;
	526
	527	case ACPI_WRITE:
c1637e9c	528
4fa4616e BM	529	memcpy(ACPI_PHYSADDR_TO_PTR(address),
4fa4616e BM	530	ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
c1637e9c BM	531	break;
c1637e9c BM	532
1da177e4 LT	533	default:
1da177e4 LT	534
c1637e9c	535	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	536	}
1da177e4 LT	537
4119532c	538	return_ACPI_STATUS(AE_OK);
1da177e4	539	}