1
2 /******************************************************************************
3 *
4 * Module Name: exregion - ACPI default op_region (address space) handlers
5 *
6 *****************************************************************************/
7
8 /*
9 * Copyright (C) 2000 - 2012, 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
50 ACPI_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 ******************************************************************************/
69 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)70 acpi_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
287 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)288 acpi_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
346 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)347 acpi_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
419 acpi_status
acpi_ex_cmos_space_handler(u32 function,acpi_physical_address address,u32 bit_width,u64 * value,void * handler_context,void * region_context)420 acpi_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
451 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)452 acpi_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
483 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)484 acpi_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 }
517