[mirror_ubuntu-artful-kernel.git] / drivers / acpi / acpica / exregion.c


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

/*
 * Copyright (C) 2000 - 2010, 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);
		}

		/*
		 * 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 %d) R/W %d 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 %d) R/W %d 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;
	u32 value32;

	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 %d (%d) 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,
							&value32, bit_width);
		*value = value32;
		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	*
	4	* Module Name: exregion - ACPI default op_region (address space) handlers
	5	*
	6	*****************************************************************************/
	7
	8	/*
a8357b0c	9	* Copyright (C) 2000 - 2010, Intel Corp.
1da177e4 LT	10	* All rights reserved.
	11	*
	12	* Redistribution and use in source and binary forms, with or without
	13	* modification, are permitted provided that the following conditions
	14	* are met:
	15	* 1. Redistributions of source code must retain the above copyright
	16	* notice, this list of conditions, and the following disclaimer,
	17	* without modification.
	18	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	19	* substantially similar to the "NO WARRANTY" disclaimer below
	20	* ("Disclaimer") and any redistribution must be conditioned upon
	21	* including a substantially similar Disclaimer requirement for further
	22	* binary redistribution.
	23	* 3. Neither the names of the above-listed copyright holders nor the names
	24	* of any contributors may be used to endorse or promote products derived
	25	* from this software without specific prior written permission.
	26	*
	27	* Alternatively, this software may be distributed under the terms of the
	28	* GNU General Public License ("GPL") version 2 as published by the Free
	29	* Software Foundation.
	30	*
	31	* NO WARRANTY
	32	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	33	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	34	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	35	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	36	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	37	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	38	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	39	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	40	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	41	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	42	* POSSIBILITY OF SUCH DAMAGES.
	43	*/
	44
1da177e4	45	#include <acpi/acpi.h>
e2f7a777 LB	46	#include "accommon.h"
e2f7a777 LB	47	#include "acinterp.h"
1da177e4	48
1da177e4	49	#define _COMPONENT ACPI_EXECUTER
4be44fcd	50	ACPI_MODULE_NAME("exregion")
1da177e4 LT	51
	52	/*******************************************************************************
	53	*
	54	* FUNCTION: acpi_ex_system_memory_space_handler
	55	*
	56	* PARAMETERS: Function - Read or Write operation
	57	* Address - Where in the space to read or write
	58	* bit_width - Field width in bits (8, 16, or 32)
	59	* Value - Pointer to in or out value
	60	* handler_context - Pointer to Handler's context
	61	* region_context - Pointer to context specific to the
	62	* accessed region
	63	*
	64	* RETURN: Status
	65	*
	66	* DESCRIPTION: Handler for the System Memory address space (Op Region)
	67	*
	68	******************************************************************************/
1da177e4	69	acpi_status
4be44fcd LB	70	acpi_ex_system_memory_space_handler(u32 function,
	71	acpi_physical_address address,
	72	u32 bit_width,
5df7e6cb	73	u64 *value,
4be44fcd	74	void handler_context, void region_context)
1da177e4	75	{
4be44fcd LB	76	acpi_status status = AE_OK;
	77	void *logical_addr_ptr = NULL;
	78	struct acpi_mem_space_context *mem_info = region_context;
	79	u32 length;
d410ee51 BM	80	acpi_size map_length;
d410ee51 BM	81	acpi_size page_boundary_map_length;
0897831b	82	#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
4be44fcd	83	u32 remainder;
1da177e4 LT	84	#endif
1da177e4 LT	85
b229cf92	86	ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
1da177e4 LT	87
	88	/* Validate and translate the bit width */
	89
	90	switch (bit_width) {
	91	case 8:
	92	length = 1;
	93	break;
	94
	95	case 16:
	96	length = 2;
	97	break;
	98
	99	case 32:
	100	length = 4;
	101	break;
	102
	103	case 64:
	104	length = 8;
	105	break;
	106
	107	default:
f6a22b0b	108	ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
b8e4d893	109	bit_width));
4be44fcd	110	return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
1da177e4 LT	111	}
1da177e4 LT	112
0897831b	113	#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
1da177e4 LT	114	/*
	115	* Hardware does not support non-aligned data transfers, we must verify
	116	* the request.
	117	*/
5df7e6cb	118	(void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
1da177e4	119	if (remainder != 0) {
4be44fcd	120	return_ACPI_STATUS(AE_AML_ALIGNMENT);
1da177e4 LT	121	}
	122	#endif
	123
	124	/*
	125	* Does the request fit into the cached memory mapping?
	126	* Is 1) Address below the current mapping? OR
	127	* 2) Address beyond the current mapping?
	128	*/
	129	if ((address < mem_info->mapped_physical_address) \|\|
5df7e6cb BM	130	(((u64) address + length) > ((u64)
	131	mem_info->mapped_physical_address +
	132	mem_info->mapped_length))) {
1da177e4 LT	133	/*
	134	* The request cannot be resolved by the current memory mapping;
	135	* Delete the existing mapping and create a new one.
	136	*/
	137	if (mem_info->mapped_length) {
52fc0b02	138
1da177e4 LT	139	/* Valid mapping, delete it */
1da177e4 LT	140
4be44fcd LB	141	acpi_os_unmap_memory(mem_info->mapped_logical_address,
4be44fcd LB	142	mem_info->mapped_length);
1da177e4 LT	143	}
	144
	145	/*
d410ee51 BM	146	* Attempt to map from the requested address to the end of the region.
	147	* However, we will never map more than one page, nor will we cross
	148	* a page boundary.
1da177e4	149	*/
d410ee51	150	map_length = (acpi_size)
4be44fcd	151	((mem_info->address + mem_info->length) - address);
44f6c012	152
d410ee51 BM	153	/*
	154	* If mapping the entire remaining portion of the region will cross
	155	* a page boundary, just map up to the page boundary, do not cross.
	156	* On some systems, crossing a page boundary while mapping regions
	157	* can cause warnings if the pages have different attributes
	158	* due to resource management
	159	*/
	160	page_boundary_map_length =
	161	ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address;
	162
	163	if (!page_boundary_map_length) {
	164	page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
	165	}
	166
	167	if (map_length > page_boundary_map_length) {
	168	map_length = page_boundary_map_length;
1da177e4 LT	169	}
	170
	171	/* Create a new mapping starting at the address given */
	172
d410ee51	173	mem_info->mapped_logical_address = acpi_os_map_memory((acpi_physical_address) address, map_length);
f3d2e786	174	if (!mem_info->mapped_logical_address) {
b8e4d893	175	ACPI_ERROR((AE_INFO,
f6a22b0b	176	"Could not map memory at 0x%8.8X%8.8X, size %u",
b7f9f042	177	ACPI_FORMAT_NATIVE_UINT(address),
d410ee51	178	(u32) map_length));
1da177e4	179	mem_info->mapped_length = 0;
f3d2e786	180	return_ACPI_STATUS(AE_NO_MEMORY);
1da177e4 LT	181	}
	182
	183	/* Save the physical address and mapping size */
	184
	185	mem_info->mapped_physical_address = address;
d410ee51	186	mem_info->mapped_length = map_length;
1da177e4 LT	187	}
	188
	189	/*
	190	* Generate a logical pointer corresponding to the address we want to
	191	* access
	192	*/
	193	logical_addr_ptr = mem_info->mapped_logical_address +
5df7e6cb	194	((u64) address - (u64) mem_info->mapped_physical_address);
4be44fcd LB	195
4be44fcd LB	196	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
8313524a	197	"System-Memory (width %d) R/W %d Address=%8.8X%8.8X\n",
b7f9f042 BM	198	bit_width, function,
b7f9f042 BM	199	ACPI_FORMAT_NATIVE_UINT(address)));
4be44fcd LB	200
	201	/*
	202	* Perform the memory read or write
	203	*
	204	* Note: For machines that do not support non-aligned transfers, the target
	205	* address was checked for alignment above. We do not attempt to break the
	206	* transfer up into smaller (byte-size) chunks because the AML specifically
	207	* asked for a transfer width that the hardware may require.
	208	*/
1da177e4 LT	209	switch (function) {
	210	case ACPI_READ:
	211
	212	*value = 0;
	213	switch (bit_width) {
	214	case 8:
5df7e6cb	215	*value = (u64) ACPI_GET8(logical_addr_ptr);
1da177e4 LT	216	break;
	217
	218	case 16:
5df7e6cb	219	*value = (u64) ACPI_GET16(logical_addr_ptr);
1da177e4 LT	220	break;
	221
	222	case 32:
5df7e6cb	223	*value = (u64) ACPI_GET32(logical_addr_ptr);
1da177e4 LT	224	break;
1da177e4 LT	225
1da177e4	226	case 64:
5df7e6cb	227	*value = (u64) ACPI_GET64(logical_addr_ptr);
1da177e4	228	break;
59fa8505	229
1da177e4 LT	230	default:
	231	/* bit_width was already validated */
	232	break;
	233	}
	234	break;
	235
	236	case ACPI_WRITE:
	237
	238	switch (bit_width) {
	239	case 8:
c51a4de8	240	ACPI_SET8(logical_addr_ptr) = (u8) * value;
1da177e4 LT	241	break;
	242
	243	case 16:
c51a4de8	244	ACPI_SET16(logical_addr_ptr) = (u16) * value;
1da177e4 LT	245	break;
	246
	247	case 32:
c51a4de8	248	ACPI_SET32(logical_addr_ptr) = (u32) * value;
1da177e4 LT	249	break;
1da177e4 LT	250
1da177e4	251	case 64:
c51a4de8	252	ACPI_SET64(logical_addr_ptr) = (u64) * value;
1da177e4	253	break;
1da177e4 LT	254
	255	default:
	256	/* bit_width was already validated */
	257	break;
	258	}
	259	break;
	260
	261	default:
	262	status = AE_BAD_PARAMETER;
	263	break;
	264	}
	265
4be44fcd	266	return_ACPI_STATUS(status);
1da177e4 LT	267	}
1da177e4 LT	268
1da177e4 LT	269	/*******************************************************************************
	270	*
	271	* FUNCTION: acpi_ex_system_io_space_handler
	272	*
	273	* PARAMETERS: Function - Read or Write operation
	274	* Address - Where in the space to read or write
	275	* bit_width - Field width in bits (8, 16, or 32)
	276	* Value - Pointer to in or out value
	277	* handler_context - Pointer to Handler's context
	278	* region_context - Pointer to context specific to the
	279	* accessed region
	280	*
	281	* RETURN: Status
	282	*
	283	* DESCRIPTION: Handler for the System IO address space (Op Region)
	284	*
	285	******************************************************************************/
	286
	287	acpi_status
4be44fcd LB	288	acpi_ex_system_io_space_handler(u32 function,
	289	acpi_physical_address address,
	290	u32 bit_width,
5df7e6cb	291	u64 *value,
4be44fcd	292	void handler_context, void region_context)
1da177e4	293	{
4be44fcd LB	294	acpi_status status = AE_OK;
4be44fcd LB	295	u32 value32;
1da177e4	296
b229cf92	297	ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
1da177e4	298
4be44fcd	299	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
8313524a	300	"System-IO (width %d) R/W %d Address=%8.8X%8.8X\n",
b7f9f042 BM	301	bit_width, function,
b7f9f042 BM	302	ACPI_FORMAT_NATIVE_UINT(address)));
1da177e4 LT	303
	304	/* Decode the function parameter */
	305
	306	switch (function) {
	307	case ACPI_READ:
	308
7f071903	309	status = acpi_hw_read_port((acpi_io_address) address,
4be44fcd	310	&value32, bit_width);
1da177e4 LT	311	*value = value32;
	312	break;
	313
	314	case ACPI_WRITE:
	315
7f071903	316	status = acpi_hw_write_port((acpi_io_address) address,
4be44fcd	317	(u32) * value, bit_width);
1da177e4 LT	318	break;
	319
	320	default:
	321	status = AE_BAD_PARAMETER;
	322	break;
	323	}
	324
4be44fcd	325	return_ACPI_STATUS(status);
1da177e4 LT	326	}
1da177e4 LT	327
1da177e4 LT	328	/*******************************************************************************
	329	*
	330	* FUNCTION: acpi_ex_pci_config_space_handler
	331	*
	332	* PARAMETERS: Function - Read or Write operation
	333	* Address - Where in the space to read or write
	334	* bit_width - Field width in bits (8, 16, or 32)
	335	* Value - Pointer to in or out value
	336	* handler_context - Pointer to Handler's context
	337	* region_context - Pointer to context specific to the
	338	* accessed region
	339	*
	340	* RETURN: Status
	341	*
	342	* DESCRIPTION: Handler for the PCI Config address space (Op Region)
	343	*
	344	******************************************************************************/
	345
	346	acpi_status
4be44fcd LB	347	acpi_ex_pci_config_space_handler(u32 function,
	348	acpi_physical_address address,
	349	u32 bit_width,
5df7e6cb	350	u64 *value,
4be44fcd	351	void handler_context, void region_context)
1da177e4	352	{
4be44fcd LB	353	acpi_status status = AE_OK;
	354	struct acpi_pci_id *pci_id;
	355	u16 pci_register;
1186974f	356	u32 value32;
1da177e4	357
b229cf92	358	ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
1da177e4 LT	359
	360	/*
	361	* The arguments to acpi_os(Read\|Write)pci_configuration are:
	362	*
	363	* pci_segment is the PCI bus segment range 0-31
	364	* pci_bus is the PCI bus number range 0-255
	365	* pci_device is the PCI device number range 0-31
	366	* pci_function is the PCI device function number
	367	* pci_register is the Config space register range 0-255 bytes
	368	*
	369	* Value - input value for write, output address for read
	370	*
	371	*/
4be44fcd	372	pci_id = (struct acpi_pci_id *)region_context;
1da177e4 LT	373	pci_register = (u16) (u32) address;
1da177e4 LT	374
4be44fcd	375	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
8313524a	376	"Pci-Config %d (%d) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
4be44fcd LB	377	function, bit_width, pci_id->segment, pci_id->bus,
4be44fcd LB	378	pci_id->device, pci_id->function, pci_register));
1da177e4 LT	379
	380	switch (function) {
	381	case ACPI_READ:
	382
4be44fcd	383	status = acpi_os_read_pci_configuration(pci_id, pci_register,
1186974f ML	384	&value32, bit_width);
1186974f ML	385	*value = value32;
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	*
	407	* PARAMETERS: Function - Read or Write operation
	408	* Address - Where in the space to read or write
	409	* bit_width - Field width in bits (8, 16, or 32)
	410	* Value - Pointer to in or out value
	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	*
	439	* PARAMETERS: Function - Read or Write operation
	440	* Address - Where in the space to read or write
	441	* bit_width - Field width in bits (8, 16, or 32)
	442	* Value - Pointer to in or out value
	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	*
	471	* PARAMETERS: Function - Read or Write operation
	472	* Address - Where in the space to read or write
	473	* bit_width - Field width in bits (8, 16, or 32)
	474	* Value - Pointer to in or out value
	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	}