[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;
	struct acpi_mem_mapping *mm = mem_info->cur_mm;
	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 (!mm || (address < mm->physical_address) ||
	    ((u64) address + length > (u64) mm->physical_address + mm->length)) {
		/*
		 * The request cannot be resolved by the current memory mapping.
		 *
		 * Look for an existing saved mapping covering the address range
		 * at hand.  If found, save it as the current one and carry out
		 * the access.
		 */
		for (mm = mem_info->first_mm; mm; mm = mm->next_mm) {
			if (mm == mem_info->cur_mm)
				continue;

			if (address < mm->physical_address)
				continue;

			if ((u64) address + length >
					(u64) mm->physical_address + mm->length)
				continue;

			mem_info->cur_mm = mm;
			goto access;
		}

		/* Create a new mappings list entry */
		mm = ACPI_ALLOCATE_ZEROED(sizeof(*mm));
		if (!mm) {
			ACPI_ERROR((AE_INFO,
				    "Unable to save memory mapping at 0x%8.8X%8.8X, size %u",
				    ACPI_FORMAT_UINT64(address), length));
			return_ACPI_STATUS(AE_NO_MEMORY);
		}

		/*
		 * 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 */

		logical_addr_ptr = acpi_os_map_memory(address, map_length);
		if (!logical_addr_ptr) {
			ACPI_ERROR((AE_INFO,
				    "Could not map memory at 0x%8.8X%8.8X, size %u",
				    ACPI_FORMAT_UINT64(address),
				    (u32)map_length));
			ACPI_FREE(mm);
			return_ACPI_STATUS(AE_NO_MEMORY);
		}

		/* Save the physical address and mapping size */

		mm->logical_address = logical_addr_ptr;
		mm->physical_address = address;
		mm->length = map_length;

		/*
		 * Add the new entry to the mappigs list and save it as the
		 * current mapping.
		 */
		mm->next_mm = mem_info->first_mm;
		mem_info->first_mm = mm;

		mem_info->cur_mm = mm;
	}

access:
	/*
	 * Generate a logical pointer corresponding to the address we want to
	 * access
	 */
	logical_addr_ptr = mm->logical_address +
		((u64) address - (u64) mm->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;
b8fcd0e5	44	struct acpi_mem_mapping *mm = mem_info->cur_mm;
4be44fcd	45	u32 length;
d410ee51 BM	46	acpi_size map_length;
d410ee51 BM	47	acpi_size page_boundary_map_length;
0897831b	48	#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
4be44fcd	49	u32 remainder;
1da177e4 LT	50	#endif
1da177e4 LT	51
b229cf92	52	ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
1da177e4 LT	53
	54	/* Validate and translate the bit width */
	55
	56	switch (bit_width) {
	57	case 8:
1d1ea1b7	58
1da177e4 LT	59	length = 1;
	60	break;
	61
	62	case 16:
1d1ea1b7	63
1da177e4 LT	64	length = 2;
	65	break;
	66
	67	case 32:
1d1ea1b7	68
1da177e4 LT	69	length = 4;
	70	break;
	71
	72	case 64:
1d1ea1b7	73
1da177e4 LT	74	length = 8;
	75	break;
	76
	77	default:
1d1ea1b7	78
f6a22b0b	79	ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
b8e4d893	80	bit_width));
4be44fcd	81	return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
1da177e4 LT	82	}
1da177e4 LT	83
0897831b	84	#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
1da177e4 LT	85	/*
	86	* Hardware does not support non-aligned data transfers, we must verify
	87	* the request.
	88	*/
5df7e6cb	89	(void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
1da177e4	90	if (remainder != 0) {
4be44fcd	91	return_ACPI_STATUS(AE_AML_ALIGNMENT);
1da177e4 LT	92	}
	93	#endif
	94
	95	/*
	96	* Does the request fit into the cached memory mapping?
	97	* Is 1) Address below the current mapping? OR
	98	* 2) Address beyond the current mapping?
	99	*/
b8fcd0e5 RW	100	if (!mm \|\| (address < mm->physical_address) \|\|
b8fcd0e5 RW	101	((u64) address + length > (u64) mm->physical_address + mm->length)) {
1da177e4	102	/*
b8fcd0e5 RW	103	* The request cannot be resolved by the current memory mapping.
	104	*
	105	* Look for an existing saved mapping covering the address range
	106	* at hand. If found, save it as the current one and carry out
	107	* the access.
1da177e4	108	*/
b8fcd0e5 RW	109	for (mm = mem_info->first_mm; mm; mm = mm->next_mm) {
	110	if (mm == mem_info->cur_mm)
	111	continue;
	112
	113	if (address < mm->physical_address)
	114	continue;
52fc0b02	115
b8fcd0e5 RW	116	if ((u64) address + length >
	117	(u64) mm->physical_address + mm->length)
	118	continue;
1da177e4	119
b8fcd0e5 RW	120	mem_info->cur_mm = mm;
	121	goto access;
	122	}
	123
	124	/* Create a new mappings list entry */
	125	mm = ACPI_ALLOCATE_ZEROED(sizeof(*mm));
	126	if (!mm) {
	127	ACPI_ERROR((AE_INFO,
	128	"Unable to save memory mapping at 0x%8.8X%8.8X, size %u",
	129	ACPI_FORMAT_UINT64(address), length));
	130	return_ACPI_STATUS(AE_NO_MEMORY);
1da177e4 LT	131	}
	132
	133	/*
75c8044f LZ	134	* October 2009: Attempt to map from the requested address to the
	135	* end of the region. However, we will never map more than one
	136	* page, nor will we cross a page boundary.
1da177e4	137	*/
d410ee51	138	map_length = (acpi_size)
4be44fcd	139	((mem_info->address + mem_info->length) - address);
44f6c012	140
d410ee51 BM	141	/*
	142	* If mapping the entire remaining portion of the region will cross
	143	* a page boundary, just map up to the page boundary, do not cross.
	144	* On some systems, crossing a page boundary while mapping regions
	145	* can cause warnings if the pages have different attributes
75c8044f LZ	146	* due to resource management.
	147	*
	148	* This has the added benefit of constraining a single mapping to
	149	* one page, which is similar to the original code that used a 4k
	150	* maximum window.
d410ee51	151	*/
938ed102 BM	152	page_boundary_map_length = (acpi_size)
938ed102 BM	153	(ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address);
739dcbb9	154	if (page_boundary_map_length == 0) {
d410ee51 BM	155	page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
	156	}
	157
	158	if (map_length > page_boundary_map_length) {
	159	map_length = page_boundary_map_length;
1da177e4 LT	160	}
	161
	162	/* Create a new mapping starting at the address given */
	163
b8fcd0e5 RW	164	logical_addr_ptr = acpi_os_map_memory(address, map_length);
b8fcd0e5 RW	165	if (!logical_addr_ptr) {
b8e4d893	166	ACPI_ERROR((AE_INFO,
f6a22b0b	167	"Could not map memory at 0x%8.8X%8.8X, size %u",
1d0a0b2f	168	ACPI_FORMAT_UINT64(address),
18ae9021	169	(u32)map_length));
b8fcd0e5	170	ACPI_FREE(mm);
f3d2e786	171	return_ACPI_STATUS(AE_NO_MEMORY);
1da177e4 LT	172	}
	173
	174	/* Save the physical address and mapping size */
	175
b8fcd0e5 RW	176	mm->logical_address = logical_addr_ptr;
	177	mm->physical_address = address;
	178	mm->length = map_length;
	179
	180	/*
	181	* Add the new entry to the mappigs list and save it as the
	182	* current mapping.
	183	*/
	184	mm->next_mm = mem_info->first_mm;
	185	mem_info->first_mm = mm;
	186
	187	mem_info->cur_mm = mm;
1da177e4 LT	188	}
1da177e4 LT	189
b8fcd0e5	190	access:
1da177e4 LT	191	/*
	192	* Generate a logical pointer corresponding to the address we want to
	193	* access
	194	*/
b8fcd0e5 RW	195	logical_addr_ptr = mm->logical_address +
b8fcd0e5 RW	196	((u64) address - (u64) mm->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",
1d0a0b2f	200	bit_width, function, ACPI_FORMAT_UINT64(address)));
4be44fcd LB	201
	202	/*
	203	* Perform the memory read or write
	204	*
	205	* Note: For machines that do not support non-aligned transfers, the target
73a3090a	206	* address was checked for alignment above. We do not attempt to break the
4be44fcd LB	207	* transfer up into smaller (byte-size) chunks because the AML specifically
	208	* asked for a transfer width that the hardware may require.
	209	*/
1da177e4 LT	210	switch (function) {
	211	case ACPI_READ:
	212
	213	*value = 0;
	214	switch (bit_width) {
	215	case 8:
1d1ea1b7 CG	216
1d1ea1b7 CG	217	*value = (u64)ACPI_GET8(logical_addr_ptr);
1da177e4 LT	218	break;
	219
	220	case 16:
1d1ea1b7 CG	221
1d1ea1b7 CG	222	*value = (u64)ACPI_GET16(logical_addr_ptr);
1da177e4 LT	223	break;
	224
	225	case 32:
1d1ea1b7 CG	226
1d1ea1b7 CG	227	*value = (u64)ACPI_GET32(logical_addr_ptr);
1da177e4 LT	228	break;
1da177e4 LT	229
1da177e4	230	case 64:
1d1ea1b7 CG	231
1d1ea1b7 CG	232	*value = (u64)ACPI_GET64(logical_addr_ptr);
1da177e4	233	break;
59fa8505	234
1da177e4	235	default:
1d1ea1b7	236
1da177e4	237	/* bit_width was already validated */
1d1ea1b7	238
1da177e4 LT	239	break;
	240	}
	241	break;
	242
	243	case ACPI_WRITE:
	244
	245	switch (bit_width) {
	246	case 8:
1d1ea1b7	247
57bf6aef	248	ACPI_SET8(logical_addr_ptr, *value);
1da177e4 LT	249	break;
	250
	251	case 16:
1d1ea1b7	252
57bf6aef	253	ACPI_SET16(logical_addr_ptr, *value);
1da177e4 LT	254	break;
	255
	256	case 32:
1d1ea1b7	257
57bf6aef	258	ACPI_SET32(logical_addr_ptr, *value);
1da177e4 LT	259	break;
1da177e4 LT	260
1da177e4	261	case 64:
1d1ea1b7	262
57bf6aef	263	ACPI_SET64(logical_addr_ptr, *value);
1da177e4	264	break;
1da177e4 LT	265
1da177e4 LT	266	default:
1d1ea1b7	267
1da177e4	268	/* bit_width was already validated */
1d1ea1b7	269
1da177e4 LT	270	break;
	271	}
	272	break;
	273
	274	default:
1d1ea1b7	275
1da177e4 LT	276	status = AE_BAD_PARAMETER;
	277	break;
	278	}
	279
4be44fcd	280	return_ACPI_STATUS(status);
1da177e4 LT	281	}
1da177e4 LT	282
1da177e4 LT	283	/*******************************************************************************
	284	*
	285	* FUNCTION: acpi_ex_system_io_space_handler
	286	*
ba494bee BM	287	* PARAMETERS: function - Read or Write operation
ba494bee BM	288	* address - Where in the space to read or write
1da177e4	289	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	290	* value - Pointer to in or out value
1da177e4 LT	291	* handler_context - Pointer to Handler's context
	292	* region_context - Pointer to context specific to the
	293	* accessed region
	294	*
	295	* RETURN: Status
	296	*
	297	* DESCRIPTION: Handler for the System IO address space (Op Region)
	298	*
	299	******************************************************************************/
	300
	301	acpi_status
4be44fcd LB	302	acpi_ex_system_io_space_handler(u32 function,
	303	acpi_physical_address address,
	304	u32 bit_width,
5df7e6cb	305	u64 *value,
4be44fcd	306	void handler_context, void region_context)
1da177e4	307	{
4be44fcd LB	308	acpi_status status = AE_OK;
4be44fcd LB	309	u32 value32;
1da177e4	310
b229cf92	311	ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
1da177e4	312
4be44fcd	313	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
b27d6597	314	"System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
1d0a0b2f	315	bit_width, function, ACPI_FORMAT_UINT64(address)));
1da177e4 LT	316
	317	/* Decode the function parameter */
	318
	319	switch (function) {
	320	case ACPI_READ:
	321
f5c1e1c5	322	status = acpi_hw_read_port((acpi_io_address)address,
4be44fcd	323	&value32, bit_width);
1da177e4 LT	324	*value = value32;
	325	break;
	326
	327	case ACPI_WRITE:
	328
f5c1e1c5 LZ	329	status = acpi_hw_write_port((acpi_io_address)address,
f5c1e1c5 LZ	330	(u32)*value, bit_width);
1da177e4 LT	331	break;
	332
	333	default:
1d1ea1b7	334
1da177e4 LT	335	status = AE_BAD_PARAMETER;
	336	break;
	337	}
	338
4be44fcd	339	return_ACPI_STATUS(status);
1da177e4 LT	340	}
1da177e4 LT	341
bd23fac3	342	#ifdef ACPI_PCI_CONFIGURED
1da177e4 LT	343	/*******************************************************************************
	344	*
	345	* FUNCTION: acpi_ex_pci_config_space_handler
	346	*
ba494bee BM	347	* PARAMETERS: function - Read or Write operation
ba494bee BM	348	* address - Where in the space to read or write
1da177e4	349	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	350	* value - Pointer to in or out value
1da177e4 LT	351	* handler_context - Pointer to Handler's context
	352	* region_context - Pointer to context specific to the
	353	* accessed region
	354	*
	355	* RETURN: Status
	356	*
	357	* DESCRIPTION: Handler for the PCI Config address space (Op Region)
	358	*
	359	******************************************************************************/
	360
	361	acpi_status
4be44fcd LB	362	acpi_ex_pci_config_space_handler(u32 function,
	363	acpi_physical_address address,
	364	u32 bit_width,
5df7e6cb	365	u64 *value,
4be44fcd	366	void handler_context, void region_context)
1da177e4	367	{
4be44fcd LB	368	acpi_status status = AE_OK;
	369	struct acpi_pci_id *pci_id;
	370	u16 pci_register;
1da177e4	371
b229cf92	372	ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
1da177e4 LT	373
	374	/*
	375	* The arguments to acpi_os(Read\|Write)pci_configuration are:
	376	*
	377	* pci_segment is the PCI bus segment range 0-31
	378	* pci_bus is the PCI bus number range 0-255
	379	* pci_device is the PCI device number range 0-31
	380	* pci_function is the PCI device function number
	381	* pci_register is the Config space register range 0-255 bytes
	382	*
ba494bee	383	* value - input value for write, output address for read
1da177e4 LT	384	*
1da177e4 LT	385	*/
4be44fcd	386	pci_id = (struct acpi_pci_id *)region_context;
1da177e4 LT	387	pci_register = (u16) (u32) address;
1da177e4 LT	388
4be44fcd	389	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
1fad8738 BM	390	"Pci-Config %u (%u) Seg(%04x) Bus(%04x) "
1fad8738 BM	391	"Dev(%04x) Func(%04x) Reg(%04x)\n",
4be44fcd LB	392	function, bit_width, pci_id->segment, pci_id->bus,
4be44fcd LB	393	pci_id->device, pci_id->function, pci_register));
1da177e4 LT	394
	395	switch (function) {
	396	case ACPI_READ:
	397
bb42cc22	398	*value = 0;
1fad8738 BM	399	status =
	400	acpi_os_read_pci_configuration(pci_id, pci_register, value,
	401	bit_width);
1da177e4 LT	402	break;
	403
	404	case ACPI_WRITE:
	405
1fad8738 BM	406	status =
	407	acpi_os_write_pci_configuration(pci_id, pci_register,
	408	*value, bit_width);
1da177e4 LT	409	break;
	410
	411	default:
	412
	413	status = AE_BAD_PARAMETER;
	414	break;
	415	}
	416
4be44fcd	417	return_ACPI_STATUS(status);
1da177e4	418	}
bd23fac3	419	#endif
1da177e4	420
1da177e4 LT	421	/*******************************************************************************
	422	*
	423	* FUNCTION: acpi_ex_cmos_space_handler
	424	*
ba494bee BM	425	* PARAMETERS: function - Read or Write operation
ba494bee BM	426	* address - Where in the space to read or write
1da177e4	427	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	428	* value - Pointer to in or out value
1da177e4 LT	429	* handler_context - Pointer to Handler's context
	430	* region_context - Pointer to context specific to the
	431	* accessed region
	432	*
	433	* RETURN: Status
	434	*
	435	* DESCRIPTION: Handler for the CMOS address space (Op Region)
	436	*
	437	******************************************************************************/
	438
	439	acpi_status
4be44fcd LB	440	acpi_ex_cmos_space_handler(u32 function,
	441	acpi_physical_address address,
	442	u32 bit_width,
5df7e6cb	443	u64 *value,
4be44fcd	444	void handler_context, void region_context)
1da177e4	445	{
4be44fcd	446	acpi_status status = AE_OK;
1da177e4	447
b229cf92	448	ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
1da177e4	449
4be44fcd	450	return_ACPI_STATUS(status);
1da177e4 LT	451	}
1da177e4 LT	452
bd23fac3	453	#ifdef ACPI_PCI_CONFIGURED
1da177e4 LT	454	/*******************************************************************************
	455	*
	456	* FUNCTION: acpi_ex_pci_bar_space_handler
	457	*
ba494bee BM	458	* PARAMETERS: function - Read or Write operation
ba494bee BM	459	* address - Where in the space to read or write
1da177e4	460	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	461	* value - Pointer to in or out value
1da177e4 LT	462	* handler_context - Pointer to Handler's context
	463	* region_context - Pointer to context specific to the
	464	* accessed region
	465	*
	466	* RETURN: Status
	467	*
	468	* DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
	469	*
	470	******************************************************************************/
	471
	472	acpi_status
4be44fcd LB	473	acpi_ex_pci_bar_space_handler(u32 function,
	474	acpi_physical_address address,
	475	u32 bit_width,
5df7e6cb	476	u64 *value,
4be44fcd	477	void handler_context, void region_context)
1da177e4	478	{
4be44fcd	479	acpi_status status = AE_OK;
1da177e4	480
b229cf92	481	ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
1da177e4	482
4be44fcd	483	return_ACPI_STATUS(status);
1da177e4	484	}
bd23fac3	485	#endif
1da177e4	486
1da177e4 LT	487	/*******************************************************************************
	488	*
	489	* FUNCTION: acpi_ex_data_table_space_handler
	490	*
ba494bee BM	491	* PARAMETERS: function - Read or Write operation
ba494bee BM	492	* address - Where in the space to read or write
1da177e4	493	* bit_width - Field width in bits (8, 16, or 32)
ba494bee	494	* value - Pointer to in or out value
1da177e4 LT	495	* handler_context - Pointer to Handler's context
	496	* region_context - Pointer to context specific to the
	497	* accessed region
	498	*
	499	* RETURN: Status
	500	*
	501	* DESCRIPTION: Handler for the Data Table address space (Op Region)
	502	*
	503	******************************************************************************/
	504
	505	acpi_status
4be44fcd LB	506	acpi_ex_data_table_space_handler(u32 function,
	507	acpi_physical_address address,
	508	u32 bit_width,
5df7e6cb	509	u64 *value,
4be44fcd	510	void handler_context, void region_context)
1da177e4	511	{
b229cf92	512	ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
1da177e4	513
c1637e9c BM	514	/*
	515	* Perform the memory read or write. The bit_width was already
	516	* validated.
	517	*/
1da177e4 LT	518	switch (function) {
	519	case ACPI_READ:
	520
4fa4616e BM	521	memcpy(ACPI_CAST_PTR(char, value),
4fa4616e BM	522	ACPI_PHYSADDR_TO_PTR(address), ACPI_DIV_8(bit_width));
1da177e4 LT	523	break;
	524
	525	case ACPI_WRITE:
c1637e9c	526
4fa4616e BM	527	memcpy(ACPI_PHYSADDR_TO_PTR(address),
4fa4616e BM	528	ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
c1637e9c BM	529	break;
c1637e9c BM	530
1da177e4 LT	531	default:
1da177e4 LT	532
c1637e9c	533	return_ACPI_STATUS(AE_BAD_PARAMETER);
1da177e4 LT	534	}
1da177e4 LT	535
4119532c	536	return_ACPI_STATUS(AE_OK);
1da177e4	537	}