s390/ptrace: get rid of long longs in psw_bits
[linux/fpc-iii.git] / drivers / acpi / acpica / exregion.c
blobb4a5e44c00dd05df639b9d56d06ee44f04dcaf1a
1 /******************************************************************************
3 * Module Name: exregion - ACPI default op_region (address space) handlers
5 *****************************************************************************/
7 /*
8 * Copyright (C) 2000 - 2015, Intel Corp.
9 * All rights reserved.
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.
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.
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)
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40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
44 #include <acpi/acpi.h>
45 #include "accommon.h"
46 #include "acinterp.h"
48 #define _COMPONENT ACPI_EXECUTER
49 ACPI_MODULE_NAME("exregion")
51 /*******************************************************************************
53 * FUNCTION: acpi_ex_system_memory_space_handler
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
63 * RETURN: Status
65 * DESCRIPTION: Handler for the System Memory address space (Op Region)
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)
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
85 ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
87 /* Validate and translate the bit width */
89 switch (bit_width) {
90 case 8:
92 length = 1;
93 break;
95 case 16:
97 length = 2;
98 break;
100 case 32:
102 length = 4;
103 break;
105 case 64:
107 length = 8;
108 break;
110 default:
112 ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
113 bit_width));
114 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
117 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
119 * Hardware does not support non-aligned data transfers, we must verify
120 * the request.
122 (void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
123 if (remainder != 0) {
124 return_ACPI_STATUS(AE_AML_ALIGNMENT);
126 #endif
129 * Does the request fit into the cached memory mapping?
130 * Is 1) Address below the current mapping? OR
131 * 2) Address beyond the current mapping?
133 if ((address < mem_info->mapped_physical_address) ||
134 (((u64) address + length) > ((u64)
135 mem_info->mapped_physical_address +
136 mem_info->mapped_length))) {
138 * The request cannot be resolved by the current memory mapping;
139 * Delete the existing mapping and create a new one.
141 if (mem_info->mapped_length) {
143 /* Valid mapping, delete it */
145 acpi_os_unmap_memory(mem_info->mapped_logical_address,
146 mem_info->mapped_length);
150 * October 2009: Attempt to map from the requested address to the
151 * end of the region. However, we will never map more than one
152 * page, nor will we cross a page boundary.
154 map_length = (acpi_size)
155 ((mem_info->address + mem_info->length) - address);
158 * If mapping the entire remaining portion of the region will cross
159 * a page boundary, just map up to the page boundary, do not cross.
160 * On some systems, crossing a page boundary while mapping regions
161 * can cause warnings if the pages have different attributes
162 * due to resource management.
164 * This has the added benefit of constraining a single mapping to
165 * one page, which is similar to the original code that used a 4k
166 * maximum window.
168 page_boundary_map_length = (acpi_size)
169 (ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address);
170 if (page_boundary_map_length == 0) {
171 page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
174 if (map_length > page_boundary_map_length) {
175 map_length = page_boundary_map_length;
178 /* Create a new mapping starting at the address given */
180 mem_info->mapped_logical_address =
181 acpi_os_map_memory(address, map_length);
182 if (!mem_info->mapped_logical_address) {
183 ACPI_ERROR((AE_INFO,
184 "Could not map memory at 0x%8.8X%8.8X, size %u",
185 ACPI_FORMAT_UINT64(address),
186 (u32)map_length));
187 mem_info->mapped_length = 0;
188 return_ACPI_STATUS(AE_NO_MEMORY);
191 /* Save the physical address and mapping size */
193 mem_info->mapped_physical_address = address;
194 mem_info->mapped_length = map_length;
198 * Generate a logical pointer corresponding to the address we want to
199 * access
201 logical_addr_ptr = mem_info->mapped_logical_address +
202 ((u64) address - (u64) mem_info->mapped_physical_address);
204 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
205 "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
206 bit_width, function, ACPI_FORMAT_UINT64(address)));
209 * Perform the memory read or write
211 * Note: For machines that do not support non-aligned transfers, the target
212 * address was checked for alignment above. We do not attempt to break the
213 * transfer up into smaller (byte-size) chunks because the AML specifically
214 * asked for a transfer width that the hardware may require.
216 switch (function) {
217 case ACPI_READ:
219 *value = 0;
220 switch (bit_width) {
221 case 8:
223 *value = (u64)ACPI_GET8(logical_addr_ptr);
224 break;
226 case 16:
228 *value = (u64)ACPI_GET16(logical_addr_ptr);
229 break;
231 case 32:
233 *value = (u64)ACPI_GET32(logical_addr_ptr);
234 break;
236 case 64:
238 *value = (u64)ACPI_GET64(logical_addr_ptr);
239 break;
241 default:
243 /* bit_width was already validated */
245 break;
247 break;
249 case ACPI_WRITE:
251 switch (bit_width) {
252 case 8:
254 ACPI_SET8(logical_addr_ptr, *value);
255 break;
257 case 16:
259 ACPI_SET16(logical_addr_ptr, *value);
260 break;
262 case 32:
264 ACPI_SET32(logical_addr_ptr, *value);
265 break;
267 case 64:
269 ACPI_SET64(logical_addr_ptr, *value);
270 break;
272 default:
274 /* bit_width was already validated */
276 break;
278 break;
280 default:
282 status = AE_BAD_PARAMETER;
283 break;
286 return_ACPI_STATUS(status);
289 /*******************************************************************************
291 * FUNCTION: acpi_ex_system_io_space_handler
293 * PARAMETERS: function - Read or Write operation
294 * address - Where in the space to read or write
295 * bit_width - Field width in bits (8, 16, or 32)
296 * value - Pointer to in or out value
297 * handler_context - Pointer to Handler's context
298 * region_context - Pointer to context specific to the
299 * accessed region
301 * RETURN: Status
303 * DESCRIPTION: Handler for the System IO address space (Op Region)
305 ******************************************************************************/
307 acpi_status
308 acpi_ex_system_io_space_handler(u32 function,
309 acpi_physical_address address,
310 u32 bit_width,
311 u64 *value,
312 void *handler_context, void *region_context)
314 acpi_status status = AE_OK;
315 u32 value32;
317 ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
319 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
320 "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
321 bit_width, function, ACPI_FORMAT_UINT64(address)));
323 /* Decode the function parameter */
325 switch (function) {
326 case ACPI_READ:
328 status = acpi_hw_read_port((acpi_io_address) address,
329 &value32, bit_width);
330 *value = value32;
331 break;
333 case ACPI_WRITE:
335 status = acpi_hw_write_port((acpi_io_address) address,
336 (u32) * value, bit_width);
337 break;
339 default:
341 status = AE_BAD_PARAMETER;
342 break;
345 return_ACPI_STATUS(status);
348 /*******************************************************************************
350 * FUNCTION: acpi_ex_pci_config_space_handler
352 * PARAMETERS: function - Read or Write operation
353 * address - Where in the space to read or write
354 * bit_width - Field width in bits (8, 16, or 32)
355 * value - Pointer to in or out value
356 * handler_context - Pointer to Handler's context
357 * region_context - Pointer to context specific to the
358 * accessed region
360 * RETURN: Status
362 * DESCRIPTION: Handler for the PCI Config address space (Op Region)
364 ******************************************************************************/
366 acpi_status
367 acpi_ex_pci_config_space_handler(u32 function,
368 acpi_physical_address address,
369 u32 bit_width,
370 u64 *value,
371 void *handler_context, void *region_context)
373 acpi_status status = AE_OK;
374 struct acpi_pci_id *pci_id;
375 u16 pci_register;
377 ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
380 * The arguments to acpi_os(Read|Write)pci_configuration are:
382 * pci_segment is the PCI bus segment range 0-31
383 * pci_bus is the PCI bus number range 0-255
384 * pci_device is the PCI device number range 0-31
385 * pci_function is the PCI device function number
386 * pci_register is the Config space register range 0-255 bytes
388 * value - input value for write, output address for read
391 pci_id = (struct acpi_pci_id *)region_context;
392 pci_register = (u16) (u32) address;
394 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
395 "Pci-Config %u (%u) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
396 function, bit_width, pci_id->segment, pci_id->bus,
397 pci_id->device, pci_id->function, pci_register));
399 switch (function) {
400 case ACPI_READ:
402 *value = 0;
403 status = acpi_os_read_pci_configuration(pci_id, pci_register,
404 value, bit_width);
405 break;
407 case ACPI_WRITE:
409 status = acpi_os_write_pci_configuration(pci_id, pci_register,
410 *value, bit_width);
411 break;
413 default:
415 status = AE_BAD_PARAMETER;
416 break;
419 return_ACPI_STATUS(status);
422 /*******************************************************************************
424 * FUNCTION: acpi_ex_cmos_space_handler
426 * PARAMETERS: function - Read or Write operation
427 * address - Where in the space to read or write
428 * bit_width - Field width in bits (8, 16, or 32)
429 * value - Pointer to in or out value
430 * handler_context - Pointer to Handler's context
431 * region_context - Pointer to context specific to the
432 * accessed region
434 * RETURN: Status
436 * DESCRIPTION: Handler for the CMOS address space (Op Region)
438 ******************************************************************************/
440 acpi_status
441 acpi_ex_cmos_space_handler(u32 function,
442 acpi_physical_address address,
443 u32 bit_width,
444 u64 *value,
445 void *handler_context, void *region_context)
447 acpi_status status = AE_OK;
449 ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
451 return_ACPI_STATUS(status);
454 /*******************************************************************************
456 * FUNCTION: acpi_ex_pci_bar_space_handler
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
466 * RETURN: Status
468 * DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
470 ******************************************************************************/
472 acpi_status
473 acpi_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)
479 acpi_status status = AE_OK;
481 ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
483 return_ACPI_STATUS(status);
486 /*******************************************************************************
488 * FUNCTION: acpi_ex_data_table_space_handler
490 * PARAMETERS: function - Read or Write operation
491 * address - Where in the space to read or write
492 * bit_width - Field width in bits (8, 16, or 32)
493 * value - Pointer to in or out value
494 * handler_context - Pointer to Handler's context
495 * region_context - Pointer to context specific to the
496 * accessed region
498 * RETURN: Status
500 * DESCRIPTION: Handler for the Data Table address space (Op Region)
502 ******************************************************************************/
504 acpi_status
505 acpi_ex_data_table_space_handler(u32 function,
506 acpi_physical_address address,
507 u32 bit_width,
508 u64 *value,
509 void *handler_context, void *region_context)
511 ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
514 * Perform the memory read or write. The bit_width was already
515 * validated.
517 switch (function) {
518 case ACPI_READ:
520 memcpy(ACPI_CAST_PTR(char, value),
521 ACPI_PHYSADDR_TO_PTR(address), ACPI_DIV_8(bit_width));
522 break;
524 case ACPI_WRITE:
526 memcpy(ACPI_PHYSADDR_TO_PTR(address),
527 ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width));
528 break;
530 default:
532 return_ACPI_STATUS(AE_BAD_PARAMETER);
535 return_ACPI_STATUS(AE_OK);