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1
2/******************************************************************************
3 *
4 * Module Name: exregion - ACPI default op_region (address space) handlers
5 *
6 *****************************************************************************/
7
8/*
9 * Copyright (C) 2000 - 2011, Intel Corp.
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
45#include <acpi/acpi.h>
46#include "accommon.h"
47#include "acinterp.h"
48
49#define _COMPONENT ACPI_EXECUTER
50ACPI_MODULE_NAME("exregion")
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 ******************************************************************************/
69acpi_status
70acpi_ex_system_memory_space_handler(u32 function,
71 acpi_physical_address address,
72 u32 bit_width,
73 u64 *value,
74 void *handler_context, void *region_context)
75{
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;
80 acpi_size map_length;
81 acpi_size page_boundary_map_length;
82#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
83 u32 remainder;
84#endif
85
86 ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
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:
108 ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
109 bit_width));
110 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
111 }
112
113#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
114 /*
115 * Hardware does not support non-aligned data transfers, we must verify
116 * the request.
117 */
118 (void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
119 if (remainder != 0) {
120 return_ACPI_STATUS(AE_AML_ALIGNMENT);
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) ||
130 (((u64) address + length) > ((u64)
131 mem_info->mapped_physical_address +
132 mem_info->mapped_length))) {
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) {
138
139 /* Valid mapping, delete it */
140
141 acpi_os_unmap_memory(mem_info->mapped_logical_address,
142 mem_info->mapped_length);
143 }
144
145 /*
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.
149 */
150 map_length = (acpi_size)
151 ((mem_info->address + mem_info->length) - address);
152
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;
169 }
170
171 /* Create a new mapping starting at the address given */
172
173 mem_info->mapped_logical_address = acpi_os_map_memory((acpi_physical_address) address, map_length);
174 if (!mem_info->mapped_logical_address) {
175 ACPI_ERROR((AE_INFO,
176 "Could not map memory at 0x%8.8X%8.8X, size %u",
177 ACPI_FORMAT_NATIVE_UINT(address),
178 (u32) map_length));
179 mem_info->mapped_length = 0;
180 return_ACPI_STATUS(AE_NO_MEMORY);
181 }
182
183 /* Save the physical address and mapping size */
184
185 mem_info->mapped_physical_address = address;
186 mem_info->mapped_length = map_length;
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 +
194 ((u64) address - (u64) mem_info->mapped_physical_address);
195
196 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
197 "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
198 bit_width, function,
199 ACPI_FORMAT_NATIVE_UINT(address)));
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 */
209 switch (function) {
210 case ACPI_READ:
211
212 *value = 0;
213 switch (bit_width) {
214 case 8:
215 *value = (u64) ACPI_GET8(logical_addr_ptr);
216 break;
217
218 case 16:
219 *value = (u64) ACPI_GET16(logical_addr_ptr);
220 break;
221
222 case 32:
223 *value = (u64) ACPI_GET32(logical_addr_ptr);
224 break;
225
226 case 64:
227 *value = (u64) ACPI_GET64(logical_addr_ptr);
228 break;
229
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:
240 ACPI_SET8(logical_addr_ptr) = (u8) * value;
241 break;
242
243 case 16:
244 ACPI_SET16(logical_addr_ptr) = (u16) * value;
245 break;
246
247 case 32:
248 ACPI_SET32(logical_addr_ptr) = (u32) * value;
249 break;
250
251 case 64:
252 ACPI_SET64(logical_addr_ptr) = (u64) * value;
253 break;
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
266 return_ACPI_STATUS(status);
267}
268
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
287acpi_status
288acpi_ex_system_io_space_handler(u32 function,
289 acpi_physical_address address,
290 u32 bit_width,
291 u64 *value,
292 void *handler_context, void *region_context)
293{
294 acpi_status status = AE_OK;
295 u32 value32;
296
297 ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
298
299 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
300 "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
301 bit_width, function,
302 ACPI_FORMAT_NATIVE_UINT(address)));
303
304 /* Decode the function parameter */
305
306 switch (function) {
307 case ACPI_READ:
308
309 status = acpi_hw_read_port((acpi_io_address) address,
310 &value32, bit_width);
311 *value = value32;
312 break;
313
314 case ACPI_WRITE:
315
316 status = acpi_hw_write_port((acpi_io_address) address,
317 (u32) * value, bit_width);
318 break;
319
320 default:
321 status = AE_BAD_PARAMETER;
322 break;
323 }
324
325 return_ACPI_STATUS(status);
326}
327
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
346acpi_status
347acpi_ex_pci_config_space_handler(u32 function,
348 acpi_physical_address address,
349 u32 bit_width,
350 u64 *value,
351 void *handler_context, void *region_context)
352{
353 acpi_status status = AE_OK;
354 struct acpi_pci_id *pci_id;
355 u16 pci_register;
356
357 ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
358
359 /*
360 * The arguments to acpi_os(Read|Write)pci_configuration are:
361 *
362 * pci_segment is the PCI bus segment range 0-31
363 * pci_bus is the PCI bus number range 0-255
364 * pci_device is the PCI device number range 0-31
365 * pci_function is the PCI device function number
366 * pci_register is the Config space register range 0-255 bytes
367 *
368 * Value - input value for write, output address for read
369 *
370 */
371 pci_id = (struct acpi_pci_id *)region_context;
372 pci_register = (u16) (u32) address;
373
374 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
375 "Pci-Config %u (%u) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
376 function, bit_width, pci_id->segment, pci_id->bus,
377 pci_id->device, pci_id->function, pci_register));
378
379 switch (function) {
380 case ACPI_READ:
381
382 status = acpi_os_read_pci_configuration(pci_id, pci_register,
383 value, bit_width);
384 break;
385
386 case ACPI_WRITE:
387
388 status = acpi_os_write_pci_configuration(pci_id, pci_register,
389 *value, bit_width);
390 break;
391
392 default:
393
394 status = AE_BAD_PARAMETER;
395 break;
396 }
397
398 return_ACPI_STATUS(status);
399}
400
401/*******************************************************************************
402 *
403 * FUNCTION: acpi_ex_cmos_space_handler
404 *
405 * PARAMETERS: Function - Read or Write operation
406 * Address - Where in the space to read or write
407 * bit_width - Field width in bits (8, 16, or 32)
408 * Value - Pointer to in or out value
409 * handler_context - Pointer to Handler's context
410 * region_context - Pointer to context specific to the
411 * accessed region
412 *
413 * RETURN: Status
414 *
415 * DESCRIPTION: Handler for the CMOS address space (Op Region)
416 *
417 ******************************************************************************/
418
419acpi_status
420acpi_ex_cmos_space_handler(u32 function,
421 acpi_physical_address address,
422 u32 bit_width,
423 u64 *value,
424 void *handler_context, void *region_context)
425{
426 acpi_status status = AE_OK;
427
428 ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
429
430 return_ACPI_STATUS(status);
431}
432
433/*******************************************************************************
434 *
435 * FUNCTION: acpi_ex_pci_bar_space_handler
436 *
437 * PARAMETERS: Function - Read or Write operation
438 * Address - Where in the space to read or write
439 * bit_width - Field width in bits (8, 16, or 32)
440 * Value - Pointer to in or out value
441 * handler_context - Pointer to Handler's context
442 * region_context - Pointer to context specific to the
443 * accessed region
444 *
445 * RETURN: Status
446 *
447 * DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
448 *
449 ******************************************************************************/
450
451acpi_status
452acpi_ex_pci_bar_space_handler(u32 function,
453 acpi_physical_address address,
454 u32 bit_width,
455 u64 *value,
456 void *handler_context, void *region_context)
457{
458 acpi_status status = AE_OK;
459
460 ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
461
462 return_ACPI_STATUS(status);
463}
464
465/*******************************************************************************
466 *
467 * FUNCTION: acpi_ex_data_table_space_handler
468 *
469 * PARAMETERS: Function - Read or Write operation
470 * Address - Where in the space to read or write
471 * bit_width - Field width in bits (8, 16, or 32)
472 * Value - Pointer to in or out value
473 * handler_context - Pointer to Handler's context
474 * region_context - Pointer to context specific to the
475 * accessed region
476 *
477 * RETURN: Status
478 *
479 * DESCRIPTION: Handler for the Data Table address space (Op Region)
480 *
481 ******************************************************************************/
482
483acpi_status
484acpi_ex_data_table_space_handler(u32 function,
485 acpi_physical_address address,
486 u32 bit_width,
487 u64 *value,
488 void *handler_context, void *region_context)
489{
490 ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
491
492 /*
493 * Perform the memory read or write. The bit_width was already
494 * validated.
495 */
496 switch (function) {
497 case ACPI_READ:
498
499 ACPI_MEMCPY(ACPI_CAST_PTR(char, value),
500 ACPI_PHYSADDR_TO_PTR(address),
501 ACPI_DIV_8(bit_width));
502 break;
503
504 case ACPI_WRITE:
505
506 ACPI_MEMCPY(ACPI_PHYSADDR_TO_PTR(address),
507 ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
508 break;
509
510 default:
511
512 return_ACPI_STATUS(AE_BAD_PARAMETER);
513 }
514
515 return_ACPI_STATUS(AE_OK);
516}
1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: exregion - ACPI default op_region (address space) handlers
5 *
6 * Copyright (C) 2000 - 2022, Intel Corp.
7 *
8 *****************************************************************************/
9
10#include <acpi/acpi.h>
11#include "accommon.h"
12#include "acinterp.h"
13
14#define _COMPONENT ACPI_EXECUTER
15ACPI_MODULE_NAME("exregion")
16
17/*******************************************************************************
18 *
19 * FUNCTION: acpi_ex_system_memory_space_handler
20 *
21 * PARAMETERS: function - Read or Write operation
22 * address - Where in the space to read or write
23 * bit_width - Field width in bits (8, 16, or 32)
24 * value - Pointer to in or out value
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 ******************************************************************************/
34acpi_status
35acpi_ex_system_memory_space_handler(u32 function,
36 acpi_physical_address address,
37 u32 bit_width,
38 u64 *value,
39 void *handler_context, void *region_context)
40{
41 acpi_status status = AE_OK;
42 void *logical_addr_ptr = NULL;
43 struct acpi_mem_space_context *mem_info = region_context;
44 struct acpi_mem_mapping *mm = mem_info->cur_mm;
45 u32 length;
46 acpi_size map_length;
47 acpi_size page_boundary_map_length;
48#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
49 u32 remainder;
50#endif
51
52 ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
53
54 /* Validate and translate the bit width */
55
56 switch (bit_width) {
57 case 8:
58
59 length = 1;
60 break;
61
62 case 16:
63
64 length = 2;
65 break;
66
67 case 32:
68
69 length = 4;
70 break;
71
72 case 64:
73
74 length = 8;
75 break;
76
77 default:
78
79 ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
80 bit_width));
81 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
82 }
83
84#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
85 /*
86 * Hardware does not support non-aligned data transfers, we must verify
87 * the request.
88 */
89 (void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
90 if (remainder != 0) {
91 return_ACPI_STATUS(AE_AML_ALIGNMENT);
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 */
100 if (!mm || (address < mm->physical_address) ||
101 ((u64) address + length > (u64) mm->physical_address + mm->length)) {
102 /*
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.
108 */
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;
115
116 if ((u64) address + length >
117 (u64) mm->physical_address + mm->length)
118 continue;
119
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);
131 }
132
133 /*
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.
137 */
138 map_length = (acpi_size)
139 ((mem_info->address + mem_info->length) - address);
140
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
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.
151 */
152 page_boundary_map_length = (acpi_size)
153 (ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address);
154 if (page_boundary_map_length == 0) {
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;
160 }
161
162 /* Create a new mapping starting at the address given */
163
164 logical_addr_ptr = acpi_os_map_memory(address, map_length);
165 if (!logical_addr_ptr) {
166 ACPI_ERROR((AE_INFO,
167 "Could not map memory at 0x%8.8X%8.8X, size %u",
168 ACPI_FORMAT_UINT64(address),
169 (u32)map_length));
170 ACPI_FREE(mm);
171 return_ACPI_STATUS(AE_NO_MEMORY);
172 }
173
174 /* Save the physical address and mapping size */
175
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;
188 }
189
190access:
191 /*
192 * Generate a logical pointer corresponding to the address we want to
193 * access
194 */
195 logical_addr_ptr = mm->logical_address +
196 ((u64) address - (u64) mm->physical_address);
197
198 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
199 "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
200 bit_width, function, ACPI_FORMAT_UINT64(address)));
201
202 /*
203 * Perform the memory read or write
204 *
205 * Note: For machines that do not support non-aligned transfers, the target
206 * address was checked for alignment above. We do not attempt to break the
207 * transfer up into smaller (byte-size) chunks because the AML specifically
208 * asked for a transfer width that the hardware may require.
209 */
210 switch (function) {
211 case ACPI_READ:
212
213 *value = 0;
214 switch (bit_width) {
215 case 8:
216
217 *value = (u64)ACPI_GET8(logical_addr_ptr);
218 break;
219
220 case 16:
221
222 *value = (u64)ACPI_GET16(logical_addr_ptr);
223 break;
224
225 case 32:
226
227 *value = (u64)ACPI_GET32(logical_addr_ptr);
228 break;
229
230 case 64:
231
232 *value = (u64)ACPI_GET64(logical_addr_ptr);
233 break;
234
235 default:
236
237 /* bit_width was already validated */
238
239 break;
240 }
241 break;
242
243 case ACPI_WRITE:
244
245 switch (bit_width) {
246 case 8:
247
248 ACPI_SET8(logical_addr_ptr, *value);
249 break;
250
251 case 16:
252
253 ACPI_SET16(logical_addr_ptr, *value);
254 break;
255
256 case 32:
257
258 ACPI_SET32(logical_addr_ptr, *value);
259 break;
260
261 case 64:
262
263 ACPI_SET64(logical_addr_ptr, *value);
264 break;
265
266 default:
267
268 /* bit_width was already validated */
269
270 break;
271 }
272 break;
273
274 default:
275
276 status = AE_BAD_PARAMETER;
277 break;
278 }
279
280 return_ACPI_STATUS(status);
281}
282
283/*******************************************************************************
284 *
285 * FUNCTION: acpi_ex_system_io_space_handler
286 *
287 * PARAMETERS: function - Read or Write operation
288 * address - Where in the space to read or write
289 * bit_width - Field width in bits (8, 16, or 32)
290 * value - Pointer to in or out value
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
301acpi_status
302acpi_ex_system_io_space_handler(u32 function,
303 acpi_physical_address address,
304 u32 bit_width,
305 u64 *value,
306 void *handler_context, void *region_context)
307{
308 acpi_status status = AE_OK;
309 u32 value32;
310
311 ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
312
313 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
314 "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
315 bit_width, function, ACPI_FORMAT_UINT64(address)));
316
317 /* Decode the function parameter */
318
319 switch (function) {
320 case ACPI_READ:
321
322 status = acpi_hw_read_port((acpi_io_address)address,
323 &value32, bit_width);
324 *value = value32;
325 break;
326
327 case ACPI_WRITE:
328
329 status = acpi_hw_write_port((acpi_io_address)address,
330 (u32)*value, bit_width);
331 break;
332
333 default:
334
335 status = AE_BAD_PARAMETER;
336 break;
337 }
338
339 return_ACPI_STATUS(status);
340}
341
342#ifdef ACPI_PCI_CONFIGURED
343/*******************************************************************************
344 *
345 * FUNCTION: acpi_ex_pci_config_space_handler
346 *
347 * PARAMETERS: function - Read or Write operation
348 * address - Where in the space to read or write
349 * bit_width - Field width in bits (8, 16, or 32)
350 * value - Pointer to in or out value
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
361acpi_status
362acpi_ex_pci_config_space_handler(u32 function,
363 acpi_physical_address address,
364 u32 bit_width,
365 u64 *value,
366 void *handler_context, void *region_context)
367{
368 acpi_status status = AE_OK;
369 struct acpi_pci_id *pci_id;
370 u16 pci_register;
371
372 ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
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 *
383 * value - input value for write, output address for read
384 *
385 */
386 pci_id = (struct acpi_pci_id *)region_context;
387 pci_register = (u16) (u32) address;
388
389 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
390 "Pci-Config %u (%u) Seg(%04x) Bus(%04x) "
391 "Dev(%04x) Func(%04x) Reg(%04x)\n",
392 function, bit_width, pci_id->segment, pci_id->bus,
393 pci_id->device, pci_id->function, pci_register));
394
395 switch (function) {
396 case ACPI_READ:
397
398 *value = 0;
399 status =
400 acpi_os_read_pci_configuration(pci_id, pci_register, value,
401 bit_width);
402 break;
403
404 case ACPI_WRITE:
405
406 status =
407 acpi_os_write_pci_configuration(pci_id, pci_register,
408 *value, bit_width);
409 break;
410
411 default:
412
413 status = AE_BAD_PARAMETER;
414 break;
415 }
416
417 return_ACPI_STATUS(status);
418}
419#endif
420
421/*******************************************************************************
422 *
423 * FUNCTION: acpi_ex_cmos_space_handler
424 *
425 * PARAMETERS: function - Read or Write operation
426 * address - Where in the space to read or write
427 * bit_width - Field width in bits (8, 16, or 32)
428 * value - Pointer to in or out value
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
439acpi_status
440acpi_ex_cmos_space_handler(u32 function,
441 acpi_physical_address address,
442 u32 bit_width,
443 u64 *value,
444 void *handler_context, void *region_context)
445{
446 acpi_status status = AE_OK;
447
448 ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
449
450 return_ACPI_STATUS(status);
451}
452
453#ifdef ACPI_PCI_CONFIGURED
454/*******************************************************************************
455 *
456 * FUNCTION: acpi_ex_pci_bar_space_handler
457 *
458 * PARAMETERS: function - Read or Write operation
459 * address - Where in the space to read or write
460 * bit_width - Field width in bits (8, 16, or 32)
461 * value - Pointer to in or out value
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
472acpi_status
473acpi_ex_pci_bar_space_handler(u32 function,
474 acpi_physical_address address,
475 u32 bit_width,
476 u64 *value,
477 void *handler_context, void *region_context)
478{
479 acpi_status status = AE_OK;
480
481 ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
482
483 return_ACPI_STATUS(status);
484}
485#endif
486
487/*******************************************************************************
488 *
489 * FUNCTION: acpi_ex_data_table_space_handler
490 *
491 * PARAMETERS: function - Read or Write operation
492 * address - Where in the space to read or write
493 * bit_width - Field width in bits (8, 16, or 32)
494 * value - Pointer to in or out value
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
505acpi_status
506acpi_ex_data_table_space_handler(u32 function,
507 acpi_physical_address address,
508 u32 bit_width,
509 u64 *value,
510 void *handler_context, void *region_context)
511{
512 struct acpi_data_table_space_context *mapping;
513 char *pointer;
514
515 ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
516
517 mapping = (struct acpi_data_table_space_context *) region_context;
518 pointer = ACPI_CAST_PTR(char, mapping->pointer) +
519 (address - ACPI_PTR_TO_PHYSADDR(mapping->pointer));
520
521 /*
522 * Perform the memory read or write. The bit_width was already
523 * validated.
524 */
525 switch (function) {
526 case ACPI_READ:
527
528 memcpy(ACPI_CAST_PTR(char, value), pointer,
529 ACPI_DIV_8(bit_width));
530 break;
531
532 case ACPI_WRITE:
533
534 memcpy(pointer, ACPI_CAST_PTR(char, value),
535 ACPI_DIV_8(bit_width));
536 break;
537
538 default:
539
540 return_ACPI_STATUS(AE_BAD_PARAMETER);
541 }
542
543 return_ACPI_STATUS(AE_OK);
544}