2 /******************************************************************************
4 * Module Name: exregion - ACPI default op_region (address space) handlers
6 *****************************************************************************/
9 * Copyright (C) 2000 - 2008, Intel Corp.
10 * All rights reserved.
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45 #include <acpi/acpi.h>
49 #define _COMPONENT ACPI_EXECUTER
50 ACPI_MODULE_NAME("exregion")
52 /*******************************************************************************
54 * FUNCTION: acpi_ex_system_memory_space_handler
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
66 * DESCRIPTION: Handler for the System Memory address space (Op Region)
68 ******************************************************************************/
70 acpi_ex_system_memory_space_handler(u32 function,
71 acpi_physical_address address,
74 void *handler_context, void *region_context)
76 acpi_status status = AE_OK;
77 void *logical_addr_ptr = NULL;
78 struct acpi_mem_space_context *mem_info = region_context;
81 acpi_size page_boundary_map_length;
82 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
86 ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
88 /* Validate and translate the bit width */
108 ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %d",
110 return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
113 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
115 * Hardware does not support non-aligned data transfers, we must verify
118 (void)acpi_ut_short_divide((acpi_integer) address, length, NULL,
120 if (remainder != 0) {
121 return_ACPI_STATUS(AE_AML_ALIGNMENT);
126 * Does the request fit into the cached memory mapping?
127 * Is 1) Address below the current mapping? OR
128 * 2) Address beyond the current mapping?
130 if ((address < mem_info->mapped_physical_address) ||
131 (((acpi_integer) address + length) > ((acpi_integer)
133 mapped_physical_address +
134 mem_info->mapped_length))) {
136 * The request cannot be resolved by the current memory mapping;
137 * Delete the existing mapping and create a new one.
139 if (mem_info->mapped_length) {
141 /* Valid mapping, delete it */
143 acpi_os_unmap_memory(mem_info->mapped_logical_address,
144 mem_info->mapped_length);
148 * Attempt to map from the requested address to the end of the region.
149 * However, we will never map more than one page, nor will we cross
152 map_length = (acpi_size)
153 ((mem_info->address + mem_info->length) - address);
156 * If mapping the entire remaining portion of the region will cross
157 * a page boundary, just map up to the page boundary, do not cross.
158 * On some systems, crossing a page boundary while mapping regions
159 * can cause warnings if the pages have different attributes
160 * due to resource management
162 page_boundary_map_length =
163 ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address;
165 if (!page_boundary_map_length) {
166 page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
169 if (map_length > page_boundary_map_length) {
170 map_length = page_boundary_map_length;
173 /* Create a new mapping starting at the address given */
175 mem_info->mapped_logical_address = acpi_os_map_memory((acpi_physical_address) address, map_length);
176 if (!mem_info->mapped_logical_address) {
178 "Could not map memory at %8.8X%8.8X, size %X",
179 ACPI_FORMAT_NATIVE_UINT(address),
181 mem_info->mapped_length = 0;
182 return_ACPI_STATUS(AE_NO_MEMORY);
185 /* Save the physical address and mapping size */
187 mem_info->mapped_physical_address = address;
188 mem_info->mapped_length = map_length;
192 * Generate a logical pointer corresponding to the address we want to
195 logical_addr_ptr = mem_info->mapped_logical_address +
196 ((acpi_integer) address -
197 (acpi_integer) mem_info->mapped_physical_address);
199 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
200 "System-Memory (width %d) R/W %d Address=%8.8X%8.8X\n",
202 ACPI_FORMAT_NATIVE_UINT(address)));
205 * Perform the memory read or write
207 * Note: For machines that do not support non-aligned transfers, the target
208 * address was checked for alignment above. We do not attempt to break the
209 * transfer up into smaller (byte-size) chunks because the AML specifically
210 * asked for a transfer width that the hardware may require.
218 *value = (acpi_integer) ACPI_GET8(logical_addr_ptr);
222 *value = (acpi_integer) ACPI_GET16(logical_addr_ptr);
226 *value = (acpi_integer) ACPI_GET32(logical_addr_ptr);
230 *value = (acpi_integer) ACPI_GET64(logical_addr_ptr);
234 /* bit_width was already validated */
243 ACPI_SET8(logical_addr_ptr) = (u8) * value;
247 ACPI_SET16(logical_addr_ptr) = (u16) * value;
251 ACPI_SET32(logical_addr_ptr) = (u32) * value;
255 ACPI_SET64(logical_addr_ptr) = (u64) * value;
259 /* bit_width was already validated */
265 status = AE_BAD_PARAMETER;
269 return_ACPI_STATUS(status);
272 /*******************************************************************************
274 * FUNCTION: acpi_ex_system_io_space_handler
276 * PARAMETERS: Function - Read or Write operation
277 * Address - Where in the space to read or write
278 * bit_width - Field width in bits (8, 16, or 32)
279 * Value - Pointer to in or out value
280 * handler_context - Pointer to Handler's context
281 * region_context - Pointer to context specific to the
286 * DESCRIPTION: Handler for the System IO address space (Op Region)
288 ******************************************************************************/
291 acpi_ex_system_io_space_handler(u32 function,
292 acpi_physical_address address,
294 acpi_integer * value,
295 void *handler_context, void *region_context)
297 acpi_status status = AE_OK;
300 ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
302 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
303 "System-IO (width %d) R/W %d Address=%8.8X%8.8X\n",
305 ACPI_FORMAT_NATIVE_UINT(address)));
307 /* Decode the function parameter */
312 status = acpi_hw_read_port((acpi_io_address) address,
313 &value32, bit_width);
319 status = acpi_hw_write_port((acpi_io_address) address,
320 (u32) * value, bit_width);
324 status = AE_BAD_PARAMETER;
328 return_ACPI_STATUS(status);
331 /*******************************************************************************
333 * FUNCTION: acpi_ex_pci_config_space_handler
335 * PARAMETERS: Function - Read or Write operation
336 * Address - Where in the space to read or write
337 * bit_width - Field width in bits (8, 16, or 32)
338 * Value - Pointer to in or out value
339 * handler_context - Pointer to Handler's context
340 * region_context - Pointer to context specific to the
345 * DESCRIPTION: Handler for the PCI Config address space (Op Region)
347 ******************************************************************************/
350 acpi_ex_pci_config_space_handler(u32 function,
351 acpi_physical_address address,
353 acpi_integer * value,
354 void *handler_context, void *region_context)
356 acpi_status status = AE_OK;
357 struct acpi_pci_id *pci_id;
361 ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
364 * The arguments to acpi_os(Read|Write)pci_configuration are:
366 * pci_segment is the PCI bus segment range 0-31
367 * pci_bus is the PCI bus number range 0-255
368 * pci_device is the PCI device number range 0-31
369 * pci_function is the PCI device function number
370 * pci_register is the Config space register range 0-255 bytes
372 * Value - input value for write, output address for read
375 pci_id = (struct acpi_pci_id *)region_context;
376 pci_register = (u16) (u32) address;
378 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
379 "Pci-Config %d (%d) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n",
380 function, bit_width, pci_id->segment, pci_id->bus,
381 pci_id->device, pci_id->function, pci_register));
386 status = acpi_os_read_pci_configuration(pci_id, pci_register,
387 &value32, bit_width);
393 status = acpi_os_write_pci_configuration(pci_id, pci_register,
399 status = AE_BAD_PARAMETER;
403 return_ACPI_STATUS(status);
406 /*******************************************************************************
408 * FUNCTION: acpi_ex_cmos_space_handler
410 * PARAMETERS: Function - Read or Write operation
411 * Address - Where in the space to read or write
412 * bit_width - Field width in bits (8, 16, or 32)
413 * Value - Pointer to in or out value
414 * handler_context - Pointer to Handler's context
415 * region_context - Pointer to context specific to the
420 * DESCRIPTION: Handler for the CMOS address space (Op Region)
422 ******************************************************************************/
425 acpi_ex_cmos_space_handler(u32 function,
426 acpi_physical_address address,
428 acpi_integer * value,
429 void *handler_context, void *region_context)
431 acpi_status status = AE_OK;
433 ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
435 return_ACPI_STATUS(status);
438 /*******************************************************************************
440 * FUNCTION: acpi_ex_pci_bar_space_handler
442 * PARAMETERS: Function - Read or Write operation
443 * Address - Where in the space to read or write
444 * bit_width - Field width in bits (8, 16, or 32)
445 * Value - Pointer to in or out value
446 * handler_context - Pointer to Handler's context
447 * region_context - Pointer to context specific to the
452 * DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
454 ******************************************************************************/
457 acpi_ex_pci_bar_space_handler(u32 function,
458 acpi_physical_address address,
460 acpi_integer * value,
461 void *handler_context, void *region_context)
463 acpi_status status = AE_OK;
465 ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
467 return_ACPI_STATUS(status);
470 /*******************************************************************************
472 * FUNCTION: acpi_ex_data_table_space_handler
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
484 * DESCRIPTION: Handler for the Data Table address space (Op Region)
486 ******************************************************************************/
489 acpi_ex_data_table_space_handler(u32 function,
490 acpi_physical_address address,
492 acpi_integer * value,
493 void *handler_context, void *region_context)
495 ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
497 /* Perform the memory read or write */
502 ACPI_MEMCPY(ACPI_CAST_PTR(char, value),
503 ACPI_PHYSADDR_TO_PTR(address),
504 ACPI_DIV_8(bit_width));
510 return_ACPI_STATUS(AE_SUPPORT);
513 return_ACPI_STATUS(AE_OK);