2 /******************************************************************************
4 * Module Name: exregion - ACPI default op_region (address space) handlers
6 *****************************************************************************/
9 * Copyright (C) 2000 - 2006, R. Byron Moore
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
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.
45 #include <acpi/acpi.h>
46 #include <acpi/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
65 * DESCRIPTION: Handler for the System Memory address space (Op Region)
67 ******************************************************************************/
69 acpi_ex_system_memory_space_handler(u32 function,
70 acpi_physical_address address,
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;
79 acpi_size window_size;
80 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
84 ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
86 /* Validate and translate the bit width */
106 ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %d",
108 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
111 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
113 * Hardware does not support non-aligned data transfers, we must verify
116 (void)acpi_ut_short_divide((acpi_integer) address, length, NULL,
118 if (remainder != 0) {
119 return_ACPI_STATUS(AE_AML_ALIGNMENT);
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?
128 if ((address < mem_info->mapped_physical_address) ||
129 (((acpi_integer) address + length) > ((acpi_integer)
131 mapped_physical_address +
132 mem_info->mapped_length))) {
134 * The request cannot be resolved by the current memory mapping;
135 * Delete the existing mapping and create a new one.
137 if (mem_info->mapped_length) {
139 /* Valid mapping, delete it */
141 acpi_os_unmap_memory(mem_info->mapped_logical_address,
142 mem_info->mapped_length);
146 * Don't attempt to map memory beyond the end of the region, and
147 * constrain the maximum mapping size to something reasonable.
149 window_size = (acpi_size)
150 ((mem_info->address + mem_info->length) - address);
152 if (window_size > ACPI_SYSMEM_REGION_WINDOW_SIZE) {
153 window_size = ACPI_SYSMEM_REGION_WINDOW_SIZE;
156 /* Create a new mapping starting at the address given */
158 status = acpi_os_map_memory(address, window_size,
160 mapped_logical_address);
161 if (ACPI_FAILURE(status)) {
163 "Could not map memory at %8.8X%8.8X, size %X",
164 ACPI_FORMAT_UINT64(address),
166 mem_info->mapped_length = 0;
167 return_ACPI_STATUS(status);
170 /* Save the physical address and mapping size */
172 mem_info->mapped_physical_address = address;
173 mem_info->mapped_length = window_size;
177 * Generate a logical pointer corresponding to the address we want to
180 logical_addr_ptr = mem_info->mapped_logical_address +
181 ((acpi_integer) address -
182 (acpi_integer) mem_info->mapped_physical_address);
184 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
185 "System-Memory (width %d) R/W %d Address=%8.8X%8.8X\n",
186 bit_width, function, ACPI_FORMAT_UINT64(address)));
189 * Perform the memory read or write
191 * Note: For machines that do not support non-aligned transfers, the target
192 * address was checked for alignment above. We do not attempt to break the
193 * transfer up into smaller (byte-size) chunks because the AML specifically
194 * asked for a transfer width that the hardware may require.
202 *value = (acpi_integer) ACPI_GET8(logical_addr_ptr);
206 *value = (acpi_integer) ACPI_GET16(logical_addr_ptr);
210 *value = (acpi_integer) ACPI_GET32(logical_addr_ptr);
213 #if ACPI_MACHINE_WIDTH != 16
215 *value = (acpi_integer) ACPI_GET64(logical_addr_ptr);
219 /* bit_width was already validated */
228 ACPI_SET8(logical_addr_ptr) = (u8) * value;
232 ACPI_SET16(logical_addr_ptr) = (u16) * value;
236 ACPI_SET32(logical_addr_ptr) = (u32) * value;
239 #if ACPI_MACHINE_WIDTH != 16
241 ACPI_SET64(logical_addr_ptr) = (u64) * value;
246 /* bit_width was already validated */
252 status = AE_BAD_PARAMETER;
256 return_ACPI_STATUS(status);
259 /*******************************************************************************
261 * FUNCTION: acpi_ex_system_io_space_handler
263 * PARAMETERS: Function - Read or Write operation
264 * Address - Where in the space to read or write
265 * bit_width - Field width in bits (8, 16, or 32)
266 * Value - Pointer to in or out value
267 * handler_context - Pointer to Handler's context
268 * region_context - Pointer to context specific to the
273 * DESCRIPTION: Handler for the System IO address space (Op Region)
275 ******************************************************************************/
278 acpi_ex_system_io_space_handler(u32 function,
279 acpi_physical_address address,
281 acpi_integer * value,
282 void *handler_context, void *region_context)
284 acpi_status status = AE_OK;
287 ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
289 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
290 "System-IO (width %d) R/W %d Address=%8.8X%8.8X\n",
291 bit_width, function, ACPI_FORMAT_UINT64(address)));
293 /* Decode the function parameter */
298 status = acpi_os_read_port((acpi_io_address) address,
299 &value32, bit_width);
305 status = acpi_os_write_port((acpi_io_address) address,
306 (u32) * value, bit_width);
310 status = AE_BAD_PARAMETER;
314 return_ACPI_STATUS(status);
317 /*******************************************************************************
319 * FUNCTION: acpi_ex_pci_config_space_handler
321 * PARAMETERS: Function - Read or Write operation
322 * Address - Where in the space to read or write
323 * bit_width - Field width in bits (8, 16, or 32)
324 * Value - Pointer to in or out value
325 * handler_context - Pointer to Handler's context
326 * region_context - Pointer to context specific to the
331 * DESCRIPTION: Handler for the PCI Config address space (Op Region)
333 ******************************************************************************/
336 acpi_ex_pci_config_space_handler(u32 function,
337 acpi_physical_address address,
339 acpi_integer * value,
340 void *handler_context, void *region_context)
342 acpi_status status = AE_OK;
343 struct acpi_pci_id *pci_id;
346 ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
349 * The arguments to acpi_os(Read|Write)pci_configuration are:
351 * pci_segment is the PCI bus segment range 0-31
352 * pci_bus is the PCI bus number range 0-255
353 * pci_device is the PCI device number range 0-31
354 * pci_function is the PCI device function number
355 * pci_register is the Config space register range 0-255 bytes
357 * Value - input value for write, output address for read
360 pci_id = (struct acpi_pci_id *)region_context;
361 pci_register = (u16) (u32) address;
363 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
364 "Pci-Config %d (%d) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
365 function, bit_width, pci_id->segment, pci_id->bus,
366 pci_id->device, pci_id->function, pci_register));
372 status = acpi_os_read_pci_configuration(pci_id, pci_register,
378 status = acpi_os_write_pci_configuration(pci_id, pci_register,
384 status = AE_BAD_PARAMETER;
388 return_ACPI_STATUS(status);
391 /*******************************************************************************
393 * FUNCTION: acpi_ex_cmos_space_handler
395 * PARAMETERS: Function - Read or Write operation
396 * Address - Where in the space to read or write
397 * bit_width - Field width in bits (8, 16, or 32)
398 * Value - Pointer to in or out value
399 * handler_context - Pointer to Handler's context
400 * region_context - Pointer to context specific to the
405 * DESCRIPTION: Handler for the CMOS address space (Op Region)
407 ******************************************************************************/
410 acpi_ex_cmos_space_handler(u32 function,
411 acpi_physical_address address,
413 acpi_integer * value,
414 void *handler_context, void *region_context)
416 acpi_status status = AE_OK;
418 ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
420 return_ACPI_STATUS(status);
423 /*******************************************************************************
425 * FUNCTION: acpi_ex_pci_bar_space_handler
427 * PARAMETERS: Function - Read or Write operation
428 * Address - Where in the space to read or write
429 * bit_width - Field width in bits (8, 16, or 32)
430 * Value - Pointer to in or out value
431 * handler_context - Pointer to Handler's context
432 * region_context - Pointer to context specific to the
437 * DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
439 ******************************************************************************/
442 acpi_ex_pci_bar_space_handler(u32 function,
443 acpi_physical_address address,
445 acpi_integer * value,
446 void *handler_context, void *region_context)
448 acpi_status status = AE_OK;
450 ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
452 return_ACPI_STATUS(status);
455 /*******************************************************************************
457 * FUNCTION: acpi_ex_data_table_space_handler
459 * PARAMETERS: Function - Read or Write operation
460 * Address - Where in the space to read or write
461 * bit_width - Field width in bits (8, 16, or 32)
462 * Value - Pointer to in or out value
463 * handler_context - Pointer to Handler's context
464 * region_context - Pointer to context specific to the
469 * DESCRIPTION: Handler for the Data Table address space (Op Region)
471 ******************************************************************************/
474 acpi_ex_data_table_space_handler(u32 function,
475 acpi_physical_address address,
477 acpi_integer * value,
478 void *handler_context, void *region_context)
480 ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
482 /* Perform the memory read or write */
487 ACPI_MEMCPY(ACPI_CAST_PTR(char, value),
488 ACPI_PHYSADDR_TO_PTR(address),
489 ACPI_DIV_8(bit_width));
495 return_ACPI_STATUS(AE_SUPPORT);
498 return_ACPI_STATUS(AE_OK);