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

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: exregion - ACPI default op_region (address space) handlers
 *
 * Copyright (C) 2000 - 2020, Intel Corp.
 *
 *****************************************************************************/

#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);
}

#ifdef ACPI_PCI_CONFIGURED
/*******************************************************************************
 *
 * 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);
}
#endif

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

#ifdef ACPI_PCI_CONFIGURED
/*******************************************************************************
 *
 * 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);
}
#endif

/*******************************************************************************
 *
 * 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
95857638	1	// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
1da177e4 LT	2	/******************************************************************************
	3	*
	4	* Module Name: exregion - ACPI default op_region (address space) handlers
	5	*
800ba7c5	6	* Copyright (C) 2000 - 2020, Intel Corp.
1da177e4	7	*
95857638	8	*****************************************************************************/
1da177e4	9
1da177e4	10	#include <acpi/acpi.h>
e2f7a777 LB	11	#include "accommon.h"
e2f7a777 LB	12	#include "acinterp.h"
1da177e4	13
1da177e4	14	#define _COMPONENT ACPI_EXECUTER
4be44fcd	15	ACPI_MODULE_NAME("exregion")
1da177e4 LT	16
	17	/*******************************************************************************
	18	*
	19	* FUNCTION: acpi_ex_system_memory_space_handler
	20	*
ba494bee BM	21	* PARAMETERS: function - Read or Write operation
ba494bee BM	22	* address - Where in the space to read or write
1da177e4	23	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	24	* value - Pointer to in or out value
1da177e4 LT	25	* handler_context - Pointer to Handler's context
	26	* region_context - Pointer to context specific to the
	27	* accessed region
	28	*
	29	* RETURN: Status
	30	*
	31	* DESCRIPTION: Handler for the System Memory address space (Op Region)
	32	*
	33	******************************************************************************/
1da177e4	34	acpi_status
4be44fcd LB	35	acpi_ex_system_memory_space_handler(u32 function,
	36	acpi_physical_address address,
	37	u32 bit_width,
5df7e6cb	38	u64 *value,
4be44fcd	39	void handler_context, void region_context)
1da177e4	40	{
4be44fcd LB	41	acpi_status status = AE_OK;
	42	void *logical_addr_ptr = NULL;
	43	struct acpi_mem_space_context *mem_info = region_context;
	44	u32 length;
d410ee51 BM	45	acpi_size map_length;
d410ee51 BM	46	acpi_size page_boundary_map_length;
0897831b	47	#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
4be44fcd	48	u32 remainder;
1da177e4 LT	49	#endif
1da177e4 LT	50
b229cf92	51	ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
1da177e4 LT	52
	53	/* Validate and translate the bit width */
	54
	55	switch (bit_width) {
	56	case 8:
1d1ea1b7	57
1da177e4 LT	58	length = 1;
	59	break;
	60
	61	case 16:
1d1ea1b7	62
1da177e4 LT	63	length = 2;
	64	break;
	65
	66	case 32:
1d1ea1b7	67
1da177e4 LT	68	length = 4;
	69	break;
	70
	71	case 64:
1d1ea1b7	72
1da177e4 LT	73	length = 8;
	74	break;
	75
	76	default:
1d1ea1b7	77
f6a22b0b	78	ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
b8e4d893	79	bit_width));
4be44fcd	80	return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
1da177e4 LT	81	}
1da177e4 LT	82
0897831b	83	#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
1da177e4 LT	84	/*
	85	* Hardware does not support non-aligned data transfers, we must verify
	86	* the request.
	87	*/
5df7e6cb	88	(void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
1da177e4	89	if (remainder != 0) {
4be44fcd	90	return_ACPI_STATUS(AE_AML_ALIGNMENT);
1da177e4 LT	91	}
	92	#endif
	93
	94	/*
	95	* Does the request fit into the cached memory mapping?
	96	* Is 1) Address below the current mapping? OR
	97	* 2) Address beyond the current mapping?
	98	*/
	99	if ((address < mem_info->mapped_physical_address) \|\|
5df7e6cb BM	100	(((u64) address + length) > ((u64)
	101	mem_info->mapped_physical_address +
	102	mem_info->mapped_length))) {
1da177e4 LT	103	/*
	104	* The request cannot be resolved by the current memory mapping;
	105	* Delete the existing mapping and create a new one.
	106	*/
	107	if (mem_info->mapped_length) {
52fc0b02	108
1da177e4 LT	109	/* Valid mapping, delete it */
1da177e4 LT	110
4be44fcd LB	111	acpi_os_unmap_memory(mem_info->mapped_logical_address,
4be44fcd LB	112	mem_info->mapped_length);
1da177e4 LT	113	}
	114
	115	/*
75c8044f LZ	116	* October 2009: Attempt to map from the requested address to the
	117	* end of the region. However, we will never map more than one
	118	* page, nor will we cross a page boundary.
1da177e4	119	*/
d410ee51	120	map_length = (acpi_size)
4be44fcd	121	((mem_info->address + mem_info->length) - address);
44f6c012	122
d410ee51 BM	123	/*
	124	* If mapping the entire remaining portion of the region will cross
	125	* a page boundary, just map up to the page boundary, do not cross.
	126	* On some systems, crossing a page boundary while mapping regions
	127	* can cause warnings if the pages have different attributes
75c8044f LZ	128	* due to resource management.
	129	*
	130	* This has the added benefit of constraining a single mapping to
	131	* one page, which is similar to the original code that used a 4k
	132	* maximum window.
d410ee51	133	*/
938ed102 BM	134	page_boundary_map_length = (acpi_size)
938ed102 BM	135	(ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address);
739dcbb9	136	if (page_boundary_map_length == 0) {
d410ee51 BM	137	page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
	138	}
	139
	140	if (map_length > page_boundary_map_length) {
	141	map_length = page_boundary_map_length;
1da177e4 LT	142	}
	143
	144	/* Create a new mapping starting at the address given */
	145
ea284925 LZ	146	mem_info->mapped_logical_address =
ea284925 LZ	147	acpi_os_map_memory(address, map_length);
f3d2e786	148	if (!mem_info->mapped_logical_address) {
b8e4d893	149	ACPI_ERROR((AE_INFO,
f6a22b0b	150	"Could not map memory at 0x%8.8X%8.8X, size %u",
1d0a0b2f	151	ACPI_FORMAT_UINT64(address),
18ae9021	152	(u32)map_length));
1da177e4	153	mem_info->mapped_length = 0;
f3d2e786	154	return_ACPI_STATUS(AE_NO_MEMORY);
1da177e4 LT	155	}
	156
	157	/* Save the physical address and mapping size */
	158
	159	mem_info->mapped_physical_address = address;
d410ee51	160	mem_info->mapped_length = map_length;
1da177e4 LT	161	}
	162
	163	/*
	164	* Generate a logical pointer corresponding to the address we want to
	165	* access
	166	*/
	167	logical_addr_ptr = mem_info->mapped_logical_address +
5df7e6cb	168	((u64) address - (u64) mem_info->mapped_physical_address);
4be44fcd LB	169
4be44fcd LB	170	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
b27d6597	171	"System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
1d0a0b2f	172	bit_width, function, ACPI_FORMAT_UINT64(address)));
4be44fcd LB	173
	174	/*
	175	* Perform the memory read or write
	176	*
	177	* Note: For machines that do not support non-aligned transfers, the target
73a3090a	178	* address was checked for alignment above. We do not attempt to break the
4be44fcd LB	179	* transfer up into smaller (byte-size) chunks because the AML specifically
	180	* asked for a transfer width that the hardware may require.
	181	*/
1da177e4 LT	182	switch (function) {
	183	case ACPI_READ:
	184
	185	*value = 0;
	186	switch (bit_width) {
	187	case 8:
1d1ea1b7 CG	188
1d1ea1b7 CG	189	*value = (u64)ACPI_GET8(logical_addr_ptr);
1da177e4 LT	190	break;
	191
	192	case 16:
1d1ea1b7 CG	193
1d1ea1b7 CG	194	*value = (u64)ACPI_GET16(logical_addr_ptr);
1da177e4 LT	195	break;
	196
	197	case 32:
1d1ea1b7 CG	198
1d1ea1b7 CG	199	*value = (u64)ACPI_GET32(logical_addr_ptr);
1da177e4 LT	200	break;
1da177e4 LT	201
1da177e4	202	case 64:
1d1ea1b7 CG	203
1d1ea1b7 CG	204	*value = (u64)ACPI_GET64(logical_addr_ptr);
1da177e4	205	break;
59fa8505	206
1da177e4	207	default:
1d1ea1b7	208
1da177e4	209	/* bit_width was already validated */
1d1ea1b7	210
1da177e4 LT	211	break;
	212	}
	213	break;
	214
	215	case ACPI_WRITE:
	216
	217	switch (bit_width) {
	218	case 8:
1d1ea1b7	219
57bf6aef	220	ACPI_SET8(logical_addr_ptr, *value);
1da177e4 LT	221	break;
	222
	223	case 16:
1d1ea1b7	224
57bf6aef	225	ACPI_SET16(logical_addr_ptr, *value);
1da177e4 LT	226	break;
	227
	228	case 32:
1d1ea1b7	229
57bf6aef	230	ACPI_SET32(logical_addr_ptr, *value);
1da177e4 LT	231	break;
1da177e4 LT	232
1da177e4	233	case 64:
1d1ea1b7	234
57bf6aef	235	ACPI_SET64(logical_addr_ptr, *value);
1da177e4	236	break;
1da177e4 LT	237
1da177e4 LT	238	default:
1d1ea1b7	239
1da177e4	240	/* bit_width was already validated */
1d1ea1b7	241
1da177e4 LT	242	break;
	243	}
	244	break;
	245
	246	default:
1d1ea1b7	247
1da177e4 LT	248	status = AE_BAD_PARAMETER;
	249	break;
	250	}
	251
4be44fcd	252	return_ACPI_STATUS(status);
1da177e4 LT	253	}
1da177e4 LT	254
1da177e4 LT	255	/*******************************************************************************
	256	*
	257	* FUNCTION: acpi_ex_system_io_space_handler
	258	*
ba494bee BM	259	* PARAMETERS: function - Read or Write operation
ba494bee BM	260	* address - Where in the space to read or write
1da177e4	261	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	262	* value - Pointer to in or out value
1da177e4 LT	263	* handler_context - Pointer to Handler's context
	264	* region_context - Pointer to context specific to the
	265	* accessed region
	266	*
	267	* RETURN: Status
	268	*
	269	* DESCRIPTION: Handler for the System IO address space (Op Region)
	270	*
	271	******************************************************************************/
	272
	273	acpi_status
4be44fcd LB	274	acpi_ex_system_io_space_handler(u32 function,
	275	acpi_physical_address address,
	276	u32 bit_width,
5df7e6cb	277	u64 *value,
4be44fcd	278	void handler_context, void region_context)
1da177e4	279	{
4be44fcd LB	280	acpi_status status = AE_OK;
4be44fcd LB	281	u32 value32;
1da177e4	282
b229cf92	283	ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
1da177e4	284
4be44fcd	285	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
b27d6597	286	"System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
1d0a0b2f	287	bit_width, function, ACPI_FORMAT_UINT64(address)));
1da177e4 LT	288
	289	/* Decode the function parameter */
	290
	291	switch (function) {
	292	case ACPI_READ:
	293
f5c1e1c5	294	status = acpi_hw_read_port((acpi_io_address)address,
4be44fcd	295	&value32, bit_width);
1da177e4 LT	296	*value = value32;
	297	break;
	298
	299	case ACPI_WRITE:
	300
f5c1e1c5 LZ	301	status = acpi_hw_write_port((acpi_io_address)address,
f5c1e1c5 LZ	302	(u32)*value, bit_width);
1da177e4 LT	303	break;
	304
	305	default:
1d1ea1b7	306
1da177e4 LT	307	status = AE_BAD_PARAMETER;
	308	break;
	309	}
	310
4be44fcd	311	return_ACPI_STATUS(status);
1da177e4 LT	312	}
1da177e4 LT	313
bd23fac3	314	#ifdef ACPI_PCI_CONFIGURED
1da177e4 LT	315	/*******************************************************************************
	316	*
	317	* FUNCTION: acpi_ex_pci_config_space_handler
	318	*
ba494bee BM	319	* PARAMETERS: function - Read or Write operation
ba494bee BM	320	* address - Where in the space to read or write
1da177e4	321	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	322	* value - Pointer to in or out value
1da177e4 LT	323	* handler_context - Pointer to Handler's context
	324	* region_context - Pointer to context specific to the
	325	* accessed region
	326	*
	327	* RETURN: Status
	328	*
	329	* DESCRIPTION: Handler for the PCI Config address space (Op Region)
	330	*
	331	******************************************************************************/
	332
	333	acpi_status
4be44fcd LB	334	acpi_ex_pci_config_space_handler(u32 function,
	335	acpi_physical_address address,
	336	u32 bit_width,
5df7e6cb	337	u64 *value,
4be44fcd	338	void handler_context, void region_context)
1da177e4	339	{
4be44fcd LB	340	acpi_status status = AE_OK;
	341	struct acpi_pci_id *pci_id;
	342	u16 pci_register;
1da177e4	343
b229cf92	344	ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
1da177e4 LT	345
	346	/*
	347	* The arguments to acpi_os(Read\|Write)pci_configuration are:
	348	*
	349	* pci_segment is the PCI bus segment range 0-31
	350	* pci_bus is the PCI bus number range 0-255
	351	* pci_device is the PCI device number range 0-31
	352	* pci_function is the PCI device function number
	353	* pci_register is the Config space register range 0-255 bytes
	354	*
ba494bee	355	* value - input value for write, output address for read
1da177e4 LT	356	*
1da177e4 LT	357	*/
4be44fcd	358	pci_id = (struct acpi_pci_id *)region_context;
1da177e4 LT	359	pci_register = (u16) (u32) address;
1da177e4 LT	360
4be44fcd	361	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1fad8738 BM	362	"Pci-Config %u (%u) Seg(%04x) Bus(%04x) "
1fad8738 BM	363	"Dev(%04x) Func(%04x) Reg(%04x)\n",
4be44fcd LB	364	function, bit_width, pci_id->segment, pci_id->bus,
4be44fcd LB	365	pci_id->device, pci_id->function, pci_register));
1da177e4 LT	366
	367	switch (function) {
	368	case ACPI_READ:
	369
bb42cc22	370	*value = 0;
1fad8738 BM	371	status =
	372	acpi_os_read_pci_configuration(pci_id, pci_register, value,
	373	bit_width);
1da177e4 LT	374	break;
	375
	376	case ACPI_WRITE:
	377
1fad8738 BM	378	status =
	379	acpi_os_write_pci_configuration(pci_id, pci_register,
	380	*value, bit_width);
1da177e4 LT	381	break;
	382
	383	default:
	384
	385	status = AE_BAD_PARAMETER;
	386	break;
	387	}
	388
4be44fcd	389	return_ACPI_STATUS(status);
1da177e4	390	}
bd23fac3	391	#endif
1da177e4	392
1da177e4 LT	393	/*******************************************************************************
	394	*
	395	* FUNCTION: acpi_ex_cmos_space_handler
	396	*
ba494bee BM	397	* PARAMETERS: function - Read or Write operation
ba494bee BM	398	* address - Where in the space to read or write
1da177e4	399	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	400	* value - Pointer to in or out value
1da177e4 LT	401	* handler_context - Pointer to Handler's context
	402	* region_context - Pointer to context specific to the
	403	* accessed region
	404	*
	405	* RETURN: Status
	406	*
	407	* DESCRIPTION: Handler for the CMOS address space (Op Region)
	408	*
	409	******************************************************************************/
	410
	411	acpi_status
4be44fcd LB	412	acpi_ex_cmos_space_handler(u32 function,
	413	acpi_physical_address address,
	414	u32 bit_width,
5df7e6cb	415	u64 *value,
4be44fcd	416	void handler_context, void region_context)
1da177e4	417	{
4be44fcd	418	acpi_status status = AE_OK;
1da177e4	419
b229cf92	420	ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
1da177e4	421
4be44fcd	422	return_ACPI_STATUS(status);
1da177e4 LT	423	}
1da177e4 LT	424
bd23fac3	425	#ifdef ACPI_PCI_CONFIGURED
1da177e4 LT	426	/*******************************************************************************
	427	*
	428	* FUNCTION: acpi_ex_pci_bar_space_handler
	429	*
ba494bee BM	430	* PARAMETERS: function - Read or Write operation
ba494bee BM	431	* address - Where in the space to read or write
1da177e4	432	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	433	* value - Pointer to in or out value
1da177e4 LT	434	* handler_context - Pointer to Handler's context
	435	* region_context - Pointer to context specific to the
	436	* accessed region
	437	*
	438	* RETURN: Status
	439	*
	440	* DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
	441	*
	442	******************************************************************************/
	443
	444	acpi_status
4be44fcd LB	445	acpi_ex_pci_bar_space_handler(u32 function,
	446	acpi_physical_address address,
	447	u32 bit_width,
5df7e6cb	448	u64 *value,
4be44fcd	449	void handler_context, void region_context)
1da177e4	450	{
4be44fcd	451	acpi_status status = AE_OK;
1da177e4	452
b229cf92	453	ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
1da177e4	454
4be44fcd	455	return_ACPI_STATUS(status);
1da177e4	456	}
bd23fac3	457	#endif
1da177e4	458
1da177e4 LT	459	/*******************************************************************************
	460	*
	461	* FUNCTION: acpi_ex_data_table_space_handler
	462	*
ba494bee BM	463	* PARAMETERS: function - Read or Write operation
ba494bee BM	464	* address - Where in the space to read or write
1da177e4	465	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	466	* value - Pointer to in or out value
1da177e4 LT	467	* handler_context - Pointer to Handler's context
	468	* region_context - Pointer to context specific to the
	469	* accessed region
	470	*
	471	* RETURN: Status
	472	*
	473	* DESCRIPTION: Handler for the Data Table address space (Op Region)
	474	*
	475	******************************************************************************/
	476
	477	acpi_status
4be44fcd LB	478	acpi_ex_data_table_space_handler(u32 function,
	479	acpi_physical_address address,
	480	u32 bit_width,
5df7e6cb	481	u64 *value,
4be44fcd	482	void handler_context, void region_context)
1da177e4	483	{
b229cf92	484	ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
1da177e4	485
c1637e9c BM	486	/*
	487	* Perform the memory read or write. The bit_width was already
	488	* validated.
	489	*/
1da177e4 LT	490	switch (function) {
	491	case ACPI_READ:
	492
4fa4616e BM	493	memcpy(ACPI_CAST_PTR(char, value),
4fa4616e BM	494	ACPI_PHYSADDR_TO_PTR(address), ACPI_DIV_8(bit_width));
1da177e4 LT	495	break;
	496
	497	case ACPI_WRITE:
c1637e9c	498
4fa4616e BM	499	memcpy(ACPI_PHYSADDR_TO_PTR(address),
4fa4616e BM	500	ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
c1637e9c BM	501	break;
c1637e9c BM	502
1da177e4 LT	503	default:
1da177e4 LT	504
c1637e9c	505	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	506	}
1da177e4 LT	507
4119532c	508	return_ACPI_STATUS(AE_OK);
1da177e4	509	}