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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13 * modification, are permitted provided that the following conditions
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17 * without modification.
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21 * including a substantially similar Disclaimer requirement for further
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24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
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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
;
80 acpi_size window_size
;
81 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
85 ACPI_FUNCTION_TRACE(ex_system_memory_space_handler
);
87 /* Validate and translate the bit width */
107 ACPI_ERROR((AE_INFO
, "Invalid SystemMemory width %d",
109 return_ACPI_STATUS(AE_AML_OPERAND_VALUE
);
112 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
114 * Hardware does not support non-aligned data transfers, we must verify
117 (void)acpi_ut_short_divide((acpi_integer
) address
, length
, NULL
,
119 if (remainder
!= 0) {
120 return_ACPI_STATUS(AE_AML_ALIGNMENT
);
125 * Does the request fit into the cached memory mapping?
126 * Is 1) Address below the current mapping? OR
127 * 2) Address beyond the current mapping?
129 if ((address
< mem_info
->mapped_physical_address
) ||
130 (((acpi_integer
) address
+ length
) > ((acpi_integer
)
132 mapped_physical_address
+
133 mem_info
->mapped_length
))) {
135 * The request cannot be resolved by the current memory mapping;
136 * Delete the existing mapping and create a new one.
138 if (mem_info
->mapped_length
) {
140 /* Valid mapping, delete it */
142 acpi_os_unmap_memory(mem_info
->mapped_logical_address
,
143 mem_info
->mapped_length
);
147 * Don't attempt to map memory beyond the end of the region, and
148 * constrain the maximum mapping size to something reasonable.
150 window_size
= (acpi_size
)
151 ((mem_info
->address
+ mem_info
->length
) - address
);
153 if (window_size
> ACPI_SYSMEM_REGION_WINDOW_SIZE
) {
154 window_size
= ACPI_SYSMEM_REGION_WINDOW_SIZE
;
157 /* Create a new mapping starting at the address given */
159 mem_info
->mapped_logical_address
=
160 acpi_os_map_memory((acpi_physical_address
) address
, window_size
);
161 if (!mem_info
->mapped_logical_address
) {
163 "Could not map memory at %8.8X%8.8X, size %X",
164 ACPI_FORMAT_NATIVE_UINT(address
),
166 mem_info
->mapped_length
= 0;
167 return_ACPI_STATUS(AE_NO_MEMORY
);
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",
187 ACPI_FORMAT_NATIVE_UINT(address
)));
190 * Perform the memory read or write
192 * Note: For machines that do not support non-aligned transfers, the target
193 * address was checked for alignment above. We do not attempt to break the
194 * transfer up into smaller (byte-size) chunks because the AML specifically
195 * asked for a transfer width that the hardware may require.
203 *value
= (acpi_integer
) ACPI_GET8(logical_addr_ptr
);
207 *value
= (acpi_integer
) ACPI_GET16(logical_addr_ptr
);
211 *value
= (acpi_integer
) ACPI_GET32(logical_addr_ptr
);
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
;
240 ACPI_SET64(logical_addr_ptr
) = (u64
) * value
;
244 /* bit_width was already validated */
250 status
= AE_BAD_PARAMETER
;
254 return_ACPI_STATUS(status
);
257 /*******************************************************************************
259 * FUNCTION: acpi_ex_system_io_space_handler
261 * PARAMETERS: Function - Read or Write operation
262 * Address - Where in the space to read or write
263 * bit_width - Field width in bits (8, 16, or 32)
264 * Value - Pointer to in or out value
265 * handler_context - Pointer to Handler's context
266 * region_context - Pointer to context specific to the
271 * DESCRIPTION: Handler for the System IO address space (Op Region)
273 ******************************************************************************/
276 acpi_ex_system_io_space_handler(u32 function
,
277 acpi_physical_address address
,
279 acpi_integer
* value
,
280 void *handler_context
, void *region_context
)
282 acpi_status status
= AE_OK
;
285 ACPI_FUNCTION_TRACE(ex_system_io_space_handler
);
287 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
288 "System-IO (width %d) R/W %d Address=%8.8X%8.8X\n",
290 ACPI_FORMAT_NATIVE_UINT(address
)));
292 /* Decode the function parameter */
297 status
= acpi_os_read_port((acpi_io_address
) address
,
298 &value32
, bit_width
);
304 status
= acpi_os_write_port((acpi_io_address
) address
,
305 (u32
) * value
, bit_width
);
309 status
= AE_BAD_PARAMETER
;
313 return_ACPI_STATUS(status
);
316 /*******************************************************************************
318 * FUNCTION: acpi_ex_pci_config_space_handler
320 * PARAMETERS: Function - Read or Write operation
321 * Address - Where in the space to read or write
322 * bit_width - Field width in bits (8, 16, or 32)
323 * Value - Pointer to in or out value
324 * handler_context - Pointer to Handler's context
325 * region_context - Pointer to context specific to the
330 * DESCRIPTION: Handler for the PCI Config address space (Op Region)
332 ******************************************************************************/
335 acpi_ex_pci_config_space_handler(u32 function
,
336 acpi_physical_address address
,
338 acpi_integer
* value
,
339 void *handler_context
, void *region_context
)
341 acpi_status status
= AE_OK
;
342 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
));
371 status
= acpi_os_read_pci_configuration(pci_id
, pci_register
,
372 &value32
, bit_width
);
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
);