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1 /******************************************************************************
2  *
3  * Module Name: exregion - ACPI default op_region (address space) handlers
4  *
5  *****************************************************************************/
6
7 /*
8  * Copyright (C) 2000 - 2013, Intel Corp.
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions, and the following disclaimer,
16  *    without modification.
17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18  *    substantially similar to the "NO WARRANTY" disclaimer below
19  *    ("Disclaimer") and any redistribution must be conditioned upon
20  *    including a substantially similar Disclaimer requirement for further
21  *    binary redistribution.
22  * 3. Neither the names of the above-listed copyright holders nor the names
23  *    of any contributors may be used to endorse or promote products derived
24  *    from this software without specific prior written permission.
25  *
26  * Alternatively, this software may be distributed under the terms of the
27  * GNU General Public License ("GPL") version 2 as published by the Free
28  * Software Foundation.
29  *
30  * NO WARRANTY
31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41  * POSSIBILITY OF SUCH DAMAGES.
42  */
43
44 #include <acpi/acpi.h>
45 #include "accommon.h"
46 #include "acinterp.h"
47
48 #define _COMPONENT          ACPI_EXECUTER
49 ACPI_MODULE_NAME("exregion")
50
51 /*******************************************************************************
52  *
53  * FUNCTION:    acpi_ex_system_memory_space_handler
54  *
55  * PARAMETERS:  function            - Read or Write operation
56  *              address             - Where in the space to read or write
57  *              bit_width           - Field width in bits (8, 16, or 32)
58  *              value               - Pointer to in or out value
59  *              handler_context     - Pointer to Handler's context
60  *              region_context      - Pointer to context specific to the
61  *                                    accessed region
62  *
63  * RETURN:      Status
64  *
65  * DESCRIPTION: Handler for the System Memory address space (Op Region)
66  *
67  ******************************************************************************/
68 acpi_status
69 acpi_ex_system_memory_space_handler(u32 function,
70                                     acpi_physical_address address,
71                                     u32 bit_width,
72                                     u64 *value,
73                                     void *handler_context, void *region_context)
74 {
75         acpi_status status = AE_OK;
76         void *logical_addr_ptr = NULL;
77         struct acpi_mem_space_context *mem_info = region_context;
78         u32 length;
79         acpi_size map_length;
80         acpi_size page_boundary_map_length;
81 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
82         u32 remainder;
83 #endif
84
85         ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
86
87         /* Validate and translate the bit width */
88
89         switch (bit_width) {
90         case 8:
91                 length = 1;
92                 break;
93
94         case 16:
95                 length = 2;
96                 break;
97
98         case 32:
99                 length = 4;
100                 break;
101
102         case 64:
103                 length = 8;
104                 break;
105
106         default:
107                 ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
108                             bit_width));
109                 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
110         }
111
112 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
113         /*
114          * Hardware does not support non-aligned data transfers, we must verify
115          * the request.
116          */
117         (void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
118         if (remainder != 0) {
119                 return_ACPI_STATUS(AE_AML_ALIGNMENT);
120         }
121 #endif
122
123         /*
124          * Does the request fit into the cached memory mapping?
125          * Is 1) Address below the current mapping? OR
126          *    2) Address beyond the current mapping?
127          */
128         if ((address < mem_info->mapped_physical_address) ||
129             (((u64) address + length) > ((u64)
130                                          mem_info->mapped_physical_address +
131                                          mem_info->mapped_length))) {
132                 /*
133                  * The request cannot be resolved by the current memory mapping;
134                  * Delete the existing mapping and create a new one.
135                  */
136                 if (mem_info->mapped_length) {
137
138                         /* Valid mapping, delete it */
139
140                         acpi_os_unmap_memory(mem_info->mapped_logical_address,
141                                              mem_info->mapped_length);
142                 }
143
144                 /*
145                  * October 2009: Attempt to map from the requested address to the
146                  * end of the region. However, we will never map more than one
147                  * page, nor will we cross a page boundary.
148                  */
149                 map_length = (acpi_size)
150                     ((mem_info->address + mem_info->length) - address);
151
152                 /*
153                  * If mapping the entire remaining portion of the region will cross
154                  * a page boundary, just map up to the page boundary, do not cross.
155                  * On some systems, crossing a page boundary while mapping regions
156                  * can cause warnings if the pages have different attributes
157                  * due to resource management.
158                  *
159                  * This has the added benefit of constraining a single mapping to
160                  * one page, which is similar to the original code that used a 4k
161                  * maximum window.
162                  */
163                 page_boundary_map_length =
164                     ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address;
165                 if (page_boundary_map_length == 0) {
166                         page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
167                 }
168
169                 if (map_length > page_boundary_map_length) {
170                         map_length = page_boundary_map_length;
171                 }
172
173                 /* Create a new mapping starting at the address given */
174
175                 mem_info->mapped_logical_address = acpi_os_map_memory((acpi_physical_address) address, map_length);
176                 if (!mem_info->mapped_logical_address) {
177                         ACPI_ERROR((AE_INFO,
178                                     "Could not map memory at 0x%8.8X%8.8X, size %u",
179                                     ACPI_FORMAT_NATIVE_UINT(address),
180                                     (u32) map_length));
181                         mem_info->mapped_length = 0;
182                         return_ACPI_STATUS(AE_NO_MEMORY);
183                 }
184
185                 /* Save the physical address and mapping size */
186
187                 mem_info->mapped_physical_address = address;
188                 mem_info->mapped_length = map_length;
189         }
190
191         /*
192          * Generate a logical pointer corresponding to the address we want to
193          * access
194          */
195         logical_addr_ptr = mem_info->mapped_logical_address +
196             ((u64) address - (u64) mem_info->mapped_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,
201                           ACPI_FORMAT_NATIVE_UINT(address)));
202
203         /*
204          * Perform the memory read or write
205          *
206          * Note: For machines that do not support non-aligned transfers, the target
207          * address was checked for alignment above. We do not attempt to break the
208          * transfer up into smaller (byte-size) chunks because the AML specifically
209          * asked for a transfer width that the hardware may require.
210          */
211         switch (function) {
212         case ACPI_READ:
213
214                 *value = 0;
215                 switch (bit_width) {
216                 case 8:
217                         *value = (u64) ACPI_GET8(logical_addr_ptr);
218                         break;
219
220                 case 16:
221                         *value = (u64) ACPI_GET16(logical_addr_ptr);
222                         break;
223
224                 case 32:
225                         *value = (u64) ACPI_GET32(logical_addr_ptr);
226                         break;
227
228                 case 64:
229                         *value = (u64) ACPI_GET64(logical_addr_ptr);
230                         break;
231
232                 default:
233                         /* bit_width was already validated */
234                         break;
235                 }
236                 break;
237
238         case ACPI_WRITE:
239
240                 switch (bit_width) {
241                 case 8:
242                         ACPI_SET8(logical_addr_ptr, *value);
243                         break;
244
245                 case 16:
246                         ACPI_SET16(logical_addr_ptr, *value);
247                         break;
248
249                 case 32:
250                         ACPI_SET32(logical_addr_ptr, *value);
251                         break;
252
253                 case 64:
254                         ACPI_SET64(logical_addr_ptr, *value);
255                         break;
256
257                 default:
258                         /* bit_width was already validated */
259                         break;
260                 }
261                 break;
262
263         default:
264                 status = AE_BAD_PARAMETER;
265                 break;
266         }
267
268         return_ACPI_STATUS(status);
269 }
270
271 /*******************************************************************************
272  *
273  * FUNCTION:    acpi_ex_system_io_space_handler
274  *
275  * PARAMETERS:  function            - Read or Write operation
276  *              address             - Where in the space to read or write
277  *              bit_width           - Field width in bits (8, 16, or 32)
278  *              value               - Pointer to in or out value
279  *              handler_context     - Pointer to Handler's context
280  *              region_context      - Pointer to context specific to the
281  *                                    accessed region
282  *
283  * RETURN:      Status
284  *
285  * DESCRIPTION: Handler for the System IO address space (Op Region)
286  *
287  ******************************************************************************/
288
289 acpi_status
290 acpi_ex_system_io_space_handler(u32 function,
291                                 acpi_physical_address address,
292                                 u32 bit_width,
293                                 u64 *value,
294                                 void *handler_context, void *region_context)
295 {
296         acpi_status status = AE_OK;
297         u32 value32;
298
299         ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
300
301         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
302                           "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
303                           bit_width, function,
304                           ACPI_FORMAT_NATIVE_UINT(address)));
305
306         /* Decode the function parameter */
307
308         switch (function) {
309         case ACPI_READ:
310
311                 status = acpi_hw_read_port((acpi_io_address) address,
312                                            &value32, bit_width);
313                 *value = value32;
314                 break;
315
316         case ACPI_WRITE:
317
318                 status = acpi_hw_write_port((acpi_io_address) address,
319                                             (u32) * value, bit_width);
320                 break;
321
322         default:
323                 status = AE_BAD_PARAMETER;
324                 break;
325         }
326
327         return_ACPI_STATUS(status);
328 }
329
330 /*******************************************************************************
331  *
332  * FUNCTION:    acpi_ex_pci_config_space_handler
333  *
334  * PARAMETERS:  function            - Read or Write operation
335  *              address             - Where in the space to read or write
336  *              bit_width           - Field width in bits (8, 16, or 32)
337  *              value               - Pointer to in or out value
338  *              handler_context     - Pointer to Handler's context
339  *              region_context      - Pointer to context specific to the
340  *                                    accessed region
341  *
342  * RETURN:      Status
343  *
344  * DESCRIPTION: Handler for the PCI Config address space (Op Region)
345  *
346  ******************************************************************************/
347
348 acpi_status
349 acpi_ex_pci_config_space_handler(u32 function,
350                                  acpi_physical_address address,
351                                  u32 bit_width,
352                                  u64 *value,
353                                  void *handler_context, void *region_context)
354 {
355         acpi_status status = AE_OK;
356         struct acpi_pci_id *pci_id;
357         u16 pci_register;
358
359         ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
360
361         /*
362          *  The arguments to acpi_os(Read|Write)pci_configuration are:
363          *
364          *  pci_segment is the PCI bus segment range 0-31
365          *  pci_bus     is the PCI bus number range 0-255
366          *  pci_device  is the PCI device number range 0-31
367          *  pci_function is the PCI device function number
368          *  pci_register is the Config space register range 0-255 bytes
369          *
370          *  value - input value for write, output address for read
371          *
372          */
373         pci_id = (struct acpi_pci_id *)region_context;
374         pci_register = (u16) (u32) address;
375
376         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
377                           "Pci-Config %u (%u) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
378                           function, bit_width, pci_id->segment, pci_id->bus,
379                           pci_id->device, pci_id->function, pci_register));
380
381         switch (function) {
382         case ACPI_READ:
383
384                 status = acpi_os_read_pci_configuration(pci_id, pci_register,
385                                                         value, bit_width);
386                 break;
387
388         case ACPI_WRITE:
389
390                 status = acpi_os_write_pci_configuration(pci_id, pci_register,
391                                                          *value, bit_width);
392                 break;
393
394         default:
395
396                 status = AE_BAD_PARAMETER;
397                 break;
398         }
399
400         return_ACPI_STATUS(status);
401 }
402
403 /*******************************************************************************
404  *
405  * FUNCTION:    acpi_ex_cmos_space_handler
406  *
407  * PARAMETERS:  function            - Read or Write operation
408  *              address             - Where in the space to read or write
409  *              bit_width           - Field width in bits (8, 16, or 32)
410  *              value               - Pointer to in or out value
411  *              handler_context     - Pointer to Handler's context
412  *              region_context      - Pointer to context specific to the
413  *                                    accessed region
414  *
415  * RETURN:      Status
416  *
417  * DESCRIPTION: Handler for the CMOS address space (Op Region)
418  *
419  ******************************************************************************/
420
421 acpi_status
422 acpi_ex_cmos_space_handler(u32 function,
423                            acpi_physical_address address,
424                            u32 bit_width,
425                            u64 *value,
426                            void *handler_context, void *region_context)
427 {
428         acpi_status status = AE_OK;
429
430         ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
431
432         return_ACPI_STATUS(status);
433 }
434
435 /*******************************************************************************
436  *
437  * FUNCTION:    acpi_ex_pci_bar_space_handler
438  *
439  * PARAMETERS:  function            - Read or Write operation
440  *              address             - Where in the space to read or write
441  *              bit_width           - Field width in bits (8, 16, or 32)
442  *              value               - Pointer to in or out value
443  *              handler_context     - Pointer to Handler's context
444  *              region_context      - Pointer to context specific to the
445  *                                    accessed region
446  *
447  * RETURN:      Status
448  *
449  * DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
450  *
451  ******************************************************************************/
452
453 acpi_status
454 acpi_ex_pci_bar_space_handler(u32 function,
455                               acpi_physical_address address,
456                               u32 bit_width,
457                               u64 *value,
458                               void *handler_context, void *region_context)
459 {
460         acpi_status status = AE_OK;
461
462         ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
463
464         return_ACPI_STATUS(status);
465 }
466
467 /*******************************************************************************
468  *
469  * FUNCTION:    acpi_ex_data_table_space_handler
470  *
471  * PARAMETERS:  function            - Read or Write operation
472  *              address             - Where in the space to read or write
473  *              bit_width           - Field width in bits (8, 16, or 32)
474  *              value               - Pointer to in or out value
475  *              handler_context     - Pointer to Handler's context
476  *              region_context      - Pointer to context specific to the
477  *                                    accessed region
478  *
479  * RETURN:      Status
480  *
481  * DESCRIPTION: Handler for the Data Table address space (Op Region)
482  *
483  ******************************************************************************/
484
485 acpi_status
486 acpi_ex_data_table_space_handler(u32 function,
487                                  acpi_physical_address address,
488                                  u32 bit_width,
489                                  u64 *value,
490                                  void *handler_context, void *region_context)
491 {
492         ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
493
494         /*
495          * Perform the memory read or write. The bit_width was already
496          * validated.
497          */
498         switch (function) {
499         case ACPI_READ:
500
501                 ACPI_MEMCPY(ACPI_CAST_PTR(char, value),
502                             ACPI_PHYSADDR_TO_PTR(address),
503                             ACPI_DIV_8(bit_width));
504                 break;
505
506         case ACPI_WRITE:
507
508                 ACPI_MEMCPY(ACPI_PHYSADDR_TO_PTR(address),
509                             ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
510                 break;
511
512         default:
513
514                 return_ACPI_STATUS(AE_BAD_PARAMETER);
515         }
516
517         return_ACPI_STATUS(AE_OK);
518 }