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Linux kernel mirror (for testing)
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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 - 2005, R. Byron Moore
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
46#include <acpi/acpi.h>
47#include <acpi/acinterp.h>
48
49
50#define _COMPONENT ACPI_EXECUTER
51 ACPI_MODULE_NAME ("exregion")
52
53
54/*******************************************************************************
55 *
56 * FUNCTION: acpi_ex_system_memory_space_handler
57 *
58 * PARAMETERS: Function - Read or Write operation
59 * Address - Where in the space to read or write
60 * bit_width - Field width in bits (8, 16, or 32)
61 * Value - Pointer to in or out value
62 * handler_context - Pointer to Handler's context
63 * region_context - Pointer to context specific to the
64 * accessed region
65 *
66 * RETURN: Status
67 *
68 * DESCRIPTION: Handler for the System Memory address space (Op Region)
69 *
70 ******************************************************************************/
71
72acpi_status
73acpi_ex_system_memory_space_handler (
74 u32 function,
75 acpi_physical_address address,
76 u32 bit_width,
77 acpi_integer *value,
78 void *handler_context,
79 void *region_context)
80{
81 acpi_status status = AE_OK;
82 void *logical_addr_ptr = NULL;
83 struct acpi_mem_space_context *mem_info = region_context;
84 u32 length;
85 acpi_size window_size;
86#ifndef ACPI_MISALIGNED_TRANSFERS
87 u32 remainder;
88#endif
89
90 ACPI_FUNCTION_TRACE ("ex_system_memory_space_handler");
91
92
93 /* Validate and translate the bit width */
94
95 switch (bit_width) {
96 case 8:
97 length = 1;
98 break;
99
100 case 16:
101 length = 2;
102 break;
103
104 case 32:
105 length = 4;
106 break;
107
108 case 64:
109 length = 8;
110 break;
111
112 default:
113 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid system_memory width %d\n",
114 bit_width));
115 return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
116 }
117
118
119#ifndef ACPI_MISALIGNED_TRANSFERS
120 /*
121 * Hardware does not support non-aligned data transfers, we must verify
122 * the request.
123 */
124 (void) acpi_ut_short_divide ((acpi_integer) address, length, NULL, &remainder);
125 if (remainder != 0) {
126 return_ACPI_STATUS (AE_AML_ALIGNMENT);
127 }
128#endif
129
130 /*
131 * Does the request fit into the cached memory mapping?
132 * Is 1) Address below the current mapping? OR
133 * 2) Address beyond the current mapping?
134 */
135 if ((address < mem_info->mapped_physical_address) ||
136 (((acpi_integer) address + length) >
137 ((acpi_integer) mem_info->mapped_physical_address + mem_info->mapped_length))) {
138 /*
139 * The request cannot be resolved by the current memory mapping;
140 * Delete the existing mapping and create a new one.
141 */
142 if (mem_info->mapped_length) {
143 /* Valid mapping, delete it */
144
145 acpi_os_unmap_memory (mem_info->mapped_logical_address,
146 mem_info->mapped_length);
147 }
148
149 /*
150 * Don't attempt to map memory beyond the end of the region, and
151 * constrain the maximum mapping size to something reasonable.
152 */
153 window_size = (acpi_size) ((mem_info->address + mem_info->length) - address);
154 if (window_size > ACPI_SYSMEM_REGION_WINDOW_SIZE) {
155 window_size = ACPI_SYSMEM_REGION_WINDOW_SIZE;
156 }
157
158 /* Create a new mapping starting at the address given */
159
160 status = acpi_os_map_memory (address, window_size,
161 (void **) &mem_info->mapped_logical_address);
162 if (ACPI_FAILURE (status)) {
163 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not map memory at %8.8X%8.8X, size %X\n",
164 ACPI_FORMAT_UINT64 (address), (u32) window_size));
165 mem_info->mapped_length = 0;
166 return_ACPI_STATUS (status);
167 }
168
169 /* Save the physical address and mapping size */
170
171 mem_info->mapped_physical_address = address;
172 mem_info->mapped_length = window_size;
173 }
174
175 /*
176 * Generate a logical pointer corresponding to the address we want to
177 * access
178 */
179 logical_addr_ptr = mem_info->mapped_logical_address +
180 ((acpi_integer) address - (acpi_integer) mem_info->mapped_physical_address);
181
182 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
183 "system_memory %d (%d width) Address=%8.8X%8.8X\n", function, bit_width,
184 ACPI_FORMAT_UINT64 (address)));
185
186 /*
187 * Perform the memory read or write
188 *
189 * Note: For machines that do not support non-aligned transfers, the target
190 * address was checked for alignment above. We do not attempt to break the
191 * transfer up into smaller (byte-size) chunks because the AML specifically
192 * asked for a transfer width that the hardware may require.
193 */
194 switch (function) {
195 case ACPI_READ:
196
197 *value = 0;
198 switch (bit_width) {
199 case 8:
200 *value = (acpi_integer) *((u8 *) logical_addr_ptr);
201 break;
202
203 case 16:
204 *value = (acpi_integer) *((u16 *) logical_addr_ptr);
205 break;
206
207 case 32:
208 *value = (acpi_integer) *((u32 *) logical_addr_ptr);
209 break;
210
211#if ACPI_MACHINE_WIDTH != 16
212 case 64:
213 *value = (acpi_integer) *((u64 *) logical_addr_ptr);
214 break;
215#endif
216 default:
217 /* bit_width was already validated */
218 break;
219 }
220 break;
221
222 case ACPI_WRITE:
223
224 switch (bit_width) {
225 case 8:
226 *(u8 *) logical_addr_ptr = (u8) *value;
227 break;
228
229 case 16:
230 *(u16 *) logical_addr_ptr = (u16) *value;
231 break;
232
233 case 32:
234 *(u32 *) logical_addr_ptr = (u32) *value;
235 break;
236
237#if ACPI_MACHINE_WIDTH != 16
238 case 64:
239 *(u64 *) logical_addr_ptr = (u64) *value;
240 break;
241#endif
242
243 default:
244 /* bit_width was already validated */
245 break;
246 }
247 break;
248
249 default:
250 status = AE_BAD_PARAMETER;
251 break;
252 }
253
254 return_ACPI_STATUS (status);
255}
256
257
258/*******************************************************************************
259 *
260 * FUNCTION: acpi_ex_system_io_space_handler
261 *
262 * PARAMETERS: Function - Read or Write operation
263 * Address - Where in the space to read or write
264 * bit_width - Field width in bits (8, 16, or 32)
265 * Value - Pointer to in or out value
266 * handler_context - Pointer to Handler's context
267 * region_context - Pointer to context specific to the
268 * accessed region
269 *
270 * RETURN: Status
271 *
272 * DESCRIPTION: Handler for the System IO address space (Op Region)
273 *
274 ******************************************************************************/
275
276acpi_status
277acpi_ex_system_io_space_handler (
278 u32 function,
279 acpi_physical_address address,
280 u32 bit_width,
281 acpi_integer *value,
282 void *handler_context,
283 void *region_context)
284{
285 acpi_status status = AE_OK;
286 u32 value32;
287
288
289 ACPI_FUNCTION_TRACE ("ex_system_io_space_handler");
290
291
292 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
293 "system_iO %d (%d width) Address=%8.8X%8.8X\n", function, bit_width,
294 ACPI_FORMAT_UINT64 (address)));
295
296 /* Decode the function parameter */
297
298 switch (function) {
299 case ACPI_READ:
300
301 status = acpi_os_read_port ((acpi_io_address) address, &value32, bit_width);
302 *value = value32;
303 break;
304
305 case ACPI_WRITE:
306
307 status = acpi_os_write_port ((acpi_io_address) address, (u32) *value, bit_width);
308 break;
309
310 default:
311 status = AE_BAD_PARAMETER;
312 break;
313 }
314
315 return_ACPI_STATUS (status);
316}
317
318
319/*******************************************************************************
320 *
321 * FUNCTION: acpi_ex_pci_config_space_handler
322 *
323 * PARAMETERS: Function - Read or Write operation
324 * Address - Where in the space to read or write
325 * bit_width - Field width in bits (8, 16, or 32)
326 * Value - Pointer to in or out value
327 * handler_context - Pointer to Handler's context
328 * region_context - Pointer to context specific to the
329 * accessed region
330 *
331 * RETURN: Status
332 *
333 * DESCRIPTION: Handler for the PCI Config address space (Op Region)
334 *
335 ******************************************************************************/
336
337acpi_status
338acpi_ex_pci_config_space_handler (
339 u32 function,
340 acpi_physical_address address,
341 u32 bit_width,
342 acpi_integer *value,
343 void *handler_context,
344 void *region_context)
345{
346 acpi_status status = AE_OK;
347 struct acpi_pci_id *pci_id;
348 u16 pci_register;
349
350
351 ACPI_FUNCTION_TRACE ("ex_pci_config_space_handler");
352
353
354 /*
355 * The arguments to acpi_os(Read|Write)pci_configuration are:
356 *
357 * pci_segment is the PCI bus segment range 0-31
358 * pci_bus is the PCI bus number range 0-255
359 * pci_device is the PCI device number range 0-31
360 * pci_function is the PCI device function number
361 * pci_register is the Config space register range 0-255 bytes
362 *
363 * Value - input value for write, output address for read
364 *
365 */
366 pci_id = (struct acpi_pci_id *) region_context;
367 pci_register = (u16) (u32) address;
368
369 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
370 "pci_config %d (%d) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
371 function, bit_width, pci_id->segment, pci_id->bus, pci_id->device,
372 pci_id->function, pci_register));
373
374 switch (function) {
375 case ACPI_READ:
376
377 *value = 0;
378 status = acpi_os_read_pci_configuration (pci_id, pci_register, value, bit_width);
379 break;
380
381 case ACPI_WRITE:
382
383 status = acpi_os_write_pci_configuration (pci_id, pci_register, *value, bit_width);
384 break;
385
386 default:
387
388 status = AE_BAD_PARAMETER;
389 break;
390 }
391
392 return_ACPI_STATUS (status);
393}
394
395
396/*******************************************************************************
397 *
398 * FUNCTION: acpi_ex_cmos_space_handler
399 *
400 * PARAMETERS: Function - Read or Write operation
401 * Address - Where in the space to read or write
402 * bit_width - Field width in bits (8, 16, or 32)
403 * Value - Pointer to in or out value
404 * handler_context - Pointer to Handler's context
405 * region_context - Pointer to context specific to the
406 * accessed region
407 *
408 * RETURN: Status
409 *
410 * DESCRIPTION: Handler for the CMOS address space (Op Region)
411 *
412 ******************************************************************************/
413
414acpi_status
415acpi_ex_cmos_space_handler (
416 u32 function,
417 acpi_physical_address address,
418 u32 bit_width,
419 acpi_integer *value,
420 void *handler_context,
421 void *region_context)
422{
423 acpi_status status = AE_OK;
424
425
426 ACPI_FUNCTION_TRACE ("ex_cmos_space_handler");
427
428
429 return_ACPI_STATUS (status);
430}
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 (
453 u32 function,
454 acpi_physical_address address,
455 u32 bit_width,
456 acpi_integer *value,
457 void *handler_context,
458 void *region_context)
459{
460 acpi_status status = AE_OK;
461
462
463 ACPI_FUNCTION_TRACE ("ex_pci_bar_space_handler");
464
465
466 return_ACPI_STATUS (status);
467}
468
469
470/*******************************************************************************
471 *
472 * FUNCTION: acpi_ex_data_table_space_handler
473 *
474 * PARAMETERS: Function - Read or Write operation
475 * Address - Where in the space to read or write
476 * bit_width - Field width in bits (8, 16, or 32)
477 * Value - Pointer to in or out value
478 * handler_context - Pointer to Handler's context
479 * region_context - Pointer to context specific to the
480 * accessed region
481 *
482 * RETURN: Status
483 *
484 * DESCRIPTION: Handler for the Data Table address space (Op Region)
485 *
486 ******************************************************************************/
487
488acpi_status
489acpi_ex_data_table_space_handler (
490 u32 function,
491 acpi_physical_address address,
492 u32 bit_width,
493 acpi_integer *value,
494 void *handler_context,
495 void *region_context)
496{
497 acpi_status status = AE_OK;
498 u32 byte_width = ACPI_DIV_8 (bit_width);
499 u32 i;
500 char *logical_addr_ptr;
501
502
503 ACPI_FUNCTION_TRACE ("ex_data_table_space_handler");
504
505
506 logical_addr_ptr = ACPI_PHYSADDR_TO_PTR (address);
507
508
509 /* Perform the memory read or write */
510
511 switch (function) {
512 case ACPI_READ:
513
514 for (i = 0; i < byte_width; i++) {
515 ((char *) value) [i] = logical_addr_ptr[i];
516 }
517 break;
518
519 case ACPI_WRITE:
520 default:
521
522 return_ACPI_STATUS (AE_SUPPORT);
523 }
524
525 return_ACPI_STATUS (status);
526}
527
528