[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / acpica / exregion.c

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

/*
 * Copyright (C) 2000 - 2012, 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_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((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);
}

/*******************************************************************************
 *
 * 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_NATIVE_UINT(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:

		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:

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

	case ACPI_WRITE:

		ACPI_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	/*
77848130	8	* Copyright (C) 2000 - 2012, 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:
	91	length = 1;
	92	break;
	93
	94	case 16:
	95	length = 2;
	96	break;
	97
	98	case 32:
	99	length = 4;
	100	break;
	101
	102	case 64:
	103	length = 8;
	104	break;
	105
	106	default:
f6a22b0b	107	ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
b8e4d893	108	bit_width));
4be44fcd	109	return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
1da177e4 LT	110	}
1da177e4 LT	111
0897831b	112	#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
1da177e4 LT	113	/*
	114	* Hardware does not support non-aligned data transfers, we must verify
	115	* the request.
	116	*/
5df7e6cb	117	(void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
1da177e4	118	if (remainder != 0) {
4be44fcd	119	return_ACPI_STATUS(AE_AML_ALIGNMENT);
1da177e4 LT	120	}
	121	#endif
	122
	123	/*
	124	* Does the request fit into the cached memory mapping?
	125	* Is 1) Address below the current mapping? OR
	126	* 2) Address beyond the current mapping?
	127	*/
	128	if ((address < mem_info->mapped_physical_address) \|\|
5df7e6cb BM	129	(((u64) address + length) > ((u64)
	130	mem_info->mapped_physical_address +
	131	mem_info->mapped_length))) {
1da177e4 LT	132	/*
	133	* The request cannot be resolved by the current memory mapping;
	134	* Delete the existing mapping and create a new one.
	135	*/
	136	if (mem_info->mapped_length) {
52fc0b02	137
1da177e4 LT	138	/* Valid mapping, delete it */
1da177e4 LT	139
4be44fcd LB	140	acpi_os_unmap_memory(mem_info->mapped_logical_address,
4be44fcd LB	141	mem_info->mapped_length);
1da177e4 LT	142	}
	143
	144	/*
75c8044f LZ	145	* October 2009: Attempt to map from the requested address to the
	146	* end of the region. However, we will never map more than one
	147	* page, nor will we cross a page boundary.
1da177e4	148	*/
d410ee51	149	map_length = (acpi_size)
4be44fcd	150	((mem_info->address + mem_info->length) - address);
44f6c012	151
d410ee51 BM	152	/*
	153	* If mapping the entire remaining portion of the region will cross
	154	* a page boundary, just map up to the page boundary, do not cross.
	155	* On some systems, crossing a page boundary while mapping regions
	156	* can cause warnings if the pages have different attributes
75c8044f LZ	157	* due to resource management.
	158	*
	159	* This has the added benefit of constraining a single mapping to
	160	* one page, which is similar to the original code that used a 4k
	161	* maximum window.
d410ee51 BM	162	*/
	163	page_boundary_map_length =
	164	ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address;
739dcbb9	165	if (page_boundary_map_length == 0) {
d410ee51 BM	166	page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
	167	}
	168
	169	if (map_length > page_boundary_map_length) {
	170	map_length = page_boundary_map_length;
1da177e4 LT	171	}
	172
	173	/* Create a new mapping starting at the address given */
	174
d410ee51	175	mem_info->mapped_logical_address = acpi_os_map_memory((acpi_physical_address) address, map_length);
f3d2e786	176	if (!mem_info->mapped_logical_address) {
b8e4d893	177	ACPI_ERROR((AE_INFO,
f6a22b0b	178	"Could not map memory at 0x%8.8X%8.8X, size %u",
b7f9f042	179	ACPI_FORMAT_NATIVE_UINT(address),
d410ee51	180	(u32) map_length));
1da177e4	181	mem_info->mapped_length = 0;
f3d2e786	182	return_ACPI_STATUS(AE_NO_MEMORY);
1da177e4 LT	183	}
	184
	185	/* Save the physical address and mapping size */
	186
	187	mem_info->mapped_physical_address = address;
d410ee51	188	mem_info->mapped_length = map_length;
1da177e4 LT	189	}
	190
	191	/*
	192	* Generate a logical pointer corresponding to the address we want to
	193	* access
	194	*/
	195	logical_addr_ptr = mem_info->mapped_logical_address +
5df7e6cb	196	((u64) address - (u64) mem_info->mapped_physical_address);
4be44fcd LB	197
4be44fcd LB	198	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
b27d6597	199	"System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
b7f9f042 BM	200	bit_width, function,
b7f9f042 BM	201	ACPI_FORMAT_NATIVE_UINT(address)));
4be44fcd LB	202
	203	/*
	204	* Perform the memory read or write
	205	*
	206	* Note: For machines that do not support non-aligned transfers, the target
73a3090a	207	* address was checked for alignment above. We do not attempt to break the
4be44fcd LB	208	* transfer up into smaller (byte-size) chunks because the AML specifically
	209	* asked for a transfer width that the hardware may require.
	210	*/
1da177e4 LT	211	switch (function) {
	212	case ACPI_READ:
	213
	214	*value = 0;
	215	switch (bit_width) {
	216	case 8:
5df7e6cb	217	*value = (u64) ACPI_GET8(logical_addr_ptr);
1da177e4 LT	218	break;
	219
	220	case 16:
5df7e6cb	221	*value = (u64) ACPI_GET16(logical_addr_ptr);
1da177e4 LT	222	break;
	223
	224	case 32:
5df7e6cb	225	*value = (u64) ACPI_GET32(logical_addr_ptr);
1da177e4 LT	226	break;
1da177e4 LT	227
1da177e4	228	case 64:
5df7e6cb	229	*value = (u64) ACPI_GET64(logical_addr_ptr);
1da177e4	230	break;
59fa8505	231
1da177e4 LT	232	default:
	233	/* bit_width was already validated */
	234	break;
	235	}
	236	break;
	237
	238	case ACPI_WRITE:
	239
	240	switch (bit_width) {
	241	case 8:
3e8214e5	242	ACPI_SET8(logical_addr_ptr) = (u8)*value;
1da177e4 LT	243	break;
	244
	245	case 16:
3e8214e5	246	ACPI_SET16(logical_addr_ptr) = (u16)*value;
1da177e4 LT	247	break;
	248
	249	case 32:
3e8214e5	250	ACPI_SET32(logical_addr_ptr) = (u32)*value;
1da177e4 LT	251	break;
1da177e4 LT	252
1da177e4	253	case 64:
3e8214e5	254	ACPI_SET64(logical_addr_ptr) = (u64)*value;
1da177e4	255	break;
1da177e4 LT	256
	257	default:
	258	/* bit_width was already validated */
	259	break;
	260	}
	261	break;
	262
	263	default:
	264	status = AE_BAD_PARAMETER;
	265	break;
	266	}
	267
4be44fcd	268	return_ACPI_STATUS(status);
1da177e4 LT	269	}
1da177e4 LT	270
1da177e4 LT	271	/*******************************************************************************
	272	*
	273	* FUNCTION: acpi_ex_system_io_space_handler
	274	*
ba494bee BM	275	* PARAMETERS: function - Read or Write operation
ba494bee BM	276	* address - Where in the space to read or write
1da177e4	277	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	278	* value - Pointer to in or out value
1da177e4 LT	279	* handler_context - Pointer to Handler's context
	280	* region_context - Pointer to context specific to the
	281	* accessed region
	282	*
	283	* RETURN: Status
	284	*
	285	* DESCRIPTION: Handler for the System IO address space (Op Region)
	286	*
	287	******************************************************************************/
	288
	289	acpi_status
4be44fcd LB	290	acpi_ex_system_io_space_handler(u32 function,
	291	acpi_physical_address address,
	292	u32 bit_width,
5df7e6cb	293	u64 *value,
4be44fcd	294	void handler_context, void region_context)
1da177e4	295	{
4be44fcd LB	296	acpi_status status = AE_OK;
4be44fcd LB	297	u32 value32;
1da177e4	298
b229cf92	299	ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
1da177e4	300
4be44fcd	301	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
b27d6597	302	"System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
b7f9f042 BM	303	bit_width, function,
b7f9f042 BM	304	ACPI_FORMAT_NATIVE_UINT(address)));
1da177e4 LT	305
	306	/* Decode the function parameter */
	307
	308	switch (function) {
	309	case ACPI_READ:
	310
7f071903	311	status = acpi_hw_read_port((acpi_io_address) address,
4be44fcd	312	&value32, bit_width);
1da177e4 LT	313	*value = value32;
	314	break;
	315
	316	case ACPI_WRITE:
	317
7f071903	318	status = acpi_hw_write_port((acpi_io_address) address,
4be44fcd	319	(u32) * value, bit_width);
1da177e4 LT	320	break;
	321
	322	default:
	323	status = AE_BAD_PARAMETER;
	324	break;
	325	}
	326
4be44fcd	327	return_ACPI_STATUS(status);
1da177e4 LT	328	}
1da177e4 LT	329
1da177e4 LT	330	/*******************************************************************************
	331	*
	332	* FUNCTION: acpi_ex_pci_config_space_handler
	333	*
ba494bee BM	334	* PARAMETERS: function - Read or Write operation
ba494bee BM	335	* address - Where in the space to read or write
1da177e4	336	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	337	* value - Pointer to in or out value
1da177e4 LT	338	* handler_context - Pointer to Handler's context
	339	* region_context - Pointer to context specific to the
	340	* accessed region
	341	*
	342	* RETURN: Status
	343	*
	344	* DESCRIPTION: Handler for the PCI Config address space (Op Region)
	345	*
	346	******************************************************************************/
	347
	348	acpi_status
4be44fcd LB	349	acpi_ex_pci_config_space_handler(u32 function,
	350	acpi_physical_address address,
	351	u32 bit_width,
5df7e6cb	352	u64 *value,
4be44fcd	353	void handler_context, void region_context)
1da177e4	354	{
4be44fcd LB	355	acpi_status status = AE_OK;
	356	struct acpi_pci_id *pci_id;
	357	u16 pci_register;
1da177e4	358
b229cf92	359	ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
1da177e4 LT	360
	361	/*
	362	* The arguments to acpi_os(Read\|Write)pci_configuration are:
	363	*
	364	* pci_segment is the PCI bus segment range 0-31
	365	* pci_bus is the PCI bus number range 0-255
	366	* pci_device is the PCI device number range 0-31
	367	* pci_function is the PCI device function number
	368	* pci_register is the Config space register range 0-255 bytes
	369	*
ba494bee	370	* value - input value for write, output address for read
1da177e4 LT	371	*
1da177e4 LT	372	*/
4be44fcd	373	pci_id = (struct acpi_pci_id *)region_context;
1da177e4 LT	374	pci_register = (u16) (u32) address;
1da177e4 LT	375
4be44fcd	376	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
b27d6597	377	"Pci-Config %u (%u) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
4be44fcd LB	378	function, bit_width, pci_id->segment, pci_id->bus,
4be44fcd LB	379	pci_id->device, pci_id->function, pci_register));
1da177e4 LT	380
	381	switch (function) {
	382	case ACPI_READ:
	383
4be44fcd	384	status = acpi_os_read_pci_configuration(pci_id, pci_register,
c5f0231e	385	value, bit_width);
1da177e4 LT	386	break;
	387
	388	case ACPI_WRITE:
	389
4be44fcd LB	390	status = acpi_os_write_pci_configuration(pci_id, pci_register,
4be44fcd LB	391	*value, bit_width);
1da177e4 LT	392	break;
	393
	394	default:
	395
	396	status = AE_BAD_PARAMETER;
	397	break;
	398	}
	399
4be44fcd	400	return_ACPI_STATUS(status);
1da177e4 LT	401	}
1da177e4 LT	402
1da177e4 LT	403	/*******************************************************************************
	404	*
	405	* FUNCTION: acpi_ex_cmos_space_handler
	406	*
ba494bee BM	407	* PARAMETERS: function - Read or Write operation
ba494bee BM	408	* address - Where in the space to read or write
1da177e4	409	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	410	* value - Pointer to in or out value
1da177e4 LT	411	* handler_context - Pointer to Handler's context
	412	* region_context - Pointer to context specific to the
	413	* accessed region
	414	*
	415	* RETURN: Status
	416	*
	417	* DESCRIPTION: Handler for the CMOS address space (Op Region)
	418	*
	419	******************************************************************************/
	420
	421	acpi_status
4be44fcd LB	422	acpi_ex_cmos_space_handler(u32 function,
	423	acpi_physical_address address,
	424	u32 bit_width,
5df7e6cb	425	u64 *value,
4be44fcd	426	void handler_context, void region_context)
1da177e4	427	{
4be44fcd	428	acpi_status status = AE_OK;
1da177e4	429
b229cf92	430	ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
1da177e4	431
4be44fcd	432	return_ACPI_STATUS(status);
1da177e4 LT	433	}
1da177e4 LT	434
1da177e4 LT	435	/*******************************************************************************
	436	*
	437	* FUNCTION: acpi_ex_pci_bar_space_handler
	438	*
ba494bee BM	439	* PARAMETERS: function - Read or Write operation
ba494bee BM	440	* address - Where in the space to read or write
1da177e4	441	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	442	* value - Pointer to in or out value
1da177e4 LT	443	* handler_context - Pointer to Handler's context
	444	* region_context - Pointer to context specific to the
	445	* accessed region
	446	*
	447	* RETURN: Status
	448	*
	449	* DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
	450	*
	451	******************************************************************************/
	452
	453	acpi_status
4be44fcd LB	454	acpi_ex_pci_bar_space_handler(u32 function,
	455	acpi_physical_address address,
	456	u32 bit_width,
5df7e6cb	457	u64 *value,
4be44fcd	458	void handler_context, void region_context)
1da177e4	459	{
4be44fcd	460	acpi_status status = AE_OK;
1da177e4	461
b229cf92	462	ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
1da177e4	463
4be44fcd	464	return_ACPI_STATUS(status);
1da177e4 LT	465	}
1da177e4 LT	466
1da177e4 LT	467	/*******************************************************************************
	468	*
	469	* FUNCTION: acpi_ex_data_table_space_handler
	470	*
ba494bee BM	471	* PARAMETERS: function - Read or Write operation
ba494bee BM	472	* address - Where in the space to read or write
1da177e4	473	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	474	* value - Pointer to in or out value
1da177e4 LT	475	* handler_context - Pointer to Handler's context
	476	* region_context - Pointer to context specific to the
	477	* accessed region
	478	*
	479	* RETURN: Status
	480	*
	481	* DESCRIPTION: Handler for the Data Table address space (Op Region)
	482	*
	483	******************************************************************************/
	484
	485	acpi_status
4be44fcd LB	486	acpi_ex_data_table_space_handler(u32 function,
	487	acpi_physical_address address,
	488	u32 bit_width,
5df7e6cb	489	u64 *value,
4be44fcd	490	void handler_context, void region_context)
1da177e4	491	{
b229cf92	492	ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
1da177e4	493
c1637e9c BM	494	/*
	495	* Perform the memory read or write. The bit_width was already
	496	* validated.
	497	*/
1da177e4 LT	498	switch (function) {
	499	case ACPI_READ:
	500
4119532c BM	501	ACPI_MEMCPY(ACPI_CAST_PTR(char, value),
	502	ACPI_PHYSADDR_TO_PTR(address),
	503	ACPI_DIV_8(bit_width));
1da177e4 LT	504	break;
	505
	506	case ACPI_WRITE:
c1637e9c BM	507
	508	ACPI_MEMCPY(ACPI_PHYSADDR_TO_PTR(address),
	509	ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
	510	break;
	511
1da177e4 LT	512	default:
1da177e4 LT	513
c1637e9c	514	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	515	}
1da177e4 LT	516
4119532c	517	return_ACPI_STATUS(AE_OK);
1da177e4	518	}