f8cd287b |
1 | /**@file\r |
2 | The implementation for EFI_ISA_IO_PROTOCOL. \r |
c3902377 |
3 | \r |
6fcb2d91 |
4 | Copyright (c) 2006 - 2009, Intel Corporation.<BR>\r |
f8cd287b |
5 | All rights reserved. This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r |
7 | which accompanies this distribution. The full text of the license may be found at\r |
8 | http://opensource.org/licenses/bsd-license.php\r |
c3902377 |
9 | \r |
f8cd287b |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
c3902377 |
12 | \r |
f8cd287b |
13 | **/\r |
c3902377 |
14 | \r |
c3902377 |
15 | #include "InternalIsaIo.h"\r |
16 | \r |
c3902377 |
17 | //\r |
6fcb2d91 |
18 | // Module Variables\r |
c3902377 |
19 | //\r |
6fcb2d91 |
20 | EFI_ISA_IO_PROTOCOL mIsaIoInterface = {\r |
c3902377 |
21 | { \r |
22 | IsaIoMemRead,\r |
23 | IsaIoMemWrite\r |
24 | },\r |
25 | { \r |
26 | IsaIoIoRead,\r |
27 | IsaIoIoWrite\r |
28 | },\r |
29 | IsaIoCopyMem,\r |
30 | IsaIoMap,\r |
31 | IsaIoUnmap,\r |
32 | IsaIoAllocateBuffer,\r |
33 | IsaIoFreeBuffer,\r |
34 | IsaIoFlush,\r |
35 | NULL,\r |
36 | 0,\r |
37 | NULL\r |
38 | };\r |
39 | \r |
6fcb2d91 |
40 | EFI_ISA_DMA_REGISTERS mDmaRegisters[8] = {\r |
c3902377 |
41 | {\r |
42 | 0x00,\r |
43 | 0x87,\r |
44 | 0x01\r |
45 | },\r |
46 | {\r |
47 | 0x02,\r |
48 | 0x83,\r |
49 | 0x03\r |
50 | },\r |
51 | {\r |
52 | 0x04,\r |
53 | 0x81,\r |
54 | 0x05\r |
55 | },\r |
56 | {\r |
57 | 0x06,\r |
58 | 0x82,\r |
59 | 0x07\r |
60 | },\r |
61 | {\r |
62 | 0x00,\r |
63 | 0x00,\r |
64 | 0x00\r |
65 | }, // Channel 4 is invalid\r |
66 | {\r |
67 | 0xC4,\r |
68 | 0x8B,\r |
69 | 0xC6\r |
70 | },\r |
71 | {\r |
72 | 0xC8,\r |
73 | 0x89,\r |
74 | 0xCA\r |
75 | },\r |
76 | {\r |
77 | 0xCC,\r |
78 | 0x8A,\r |
79 | 0xCE\r |
80 | },\r |
81 | };\r |
82 | \r |
bcd70414 |
83 | /**\r |
6fcb2d91 |
84 | report a error Status code\r |
bcd70414 |
85 | \r |
6fcb2d91 |
86 | @param Code The error status code.\r |
bcd70414 |
87 | \r |
6fcb2d91 |
88 | @return EFI_SUCCESS Success to report status code.\r |
bcd70414 |
89 | **/\r |
c3902377 |
90 | EFI_STATUS\r |
91 | ReportErrorStatusCode (\r |
92 | EFI_STATUS_CODE_VALUE Code\r |
93 | )\r |
c3902377 |
94 | {\r |
95 | return REPORT_STATUS_CODE (\r |
6fcb2d91 |
96 | EFI_ERROR_CODE | EFI_ERROR_MINOR,\r |
97 | Code\r |
98 | );\r |
c3902377 |
99 | }\r |
100 | \r |
bcd70414 |
101 | /**\r |
bcd70414 |
102 | Initializes an ISA I/O Instance\r |
c3902377 |
103 | \r |
6fcb2d91 |
104 | @param[in] IsaIoDevice The iso device to be initialized.\r |
105 | @param[in] IsaDeviceResourceList The resource list.\r |
bcd70414 |
106 | \r |
6fcb2d91 |
107 | @retval None\r |
bcd70414 |
108 | **/\r |
6fcb2d91 |
109 | VOID\r |
c3902377 |
110 | InitializeIsaIoInstance (\r |
111 | IN ISA_IO_DEVICE *IsaIoDevice,\r |
112 | IN EFI_ISA_ACPI_RESOURCE_LIST *IsaDeviceResourceList\r |
113 | )\r |
c3902377 |
114 | {\r |
115 | //\r |
6fcb2d91 |
116 | // Use the ISA IO Protocol structure template to initialize the ISA IO instance\r |
c3902377 |
117 | //\r |
118 | CopyMem (\r |
119 | &IsaIoDevice->IsaIo,\r |
6fcb2d91 |
120 | &mIsaIoInterface,\r |
c3902377 |
121 | sizeof (EFI_ISA_IO_PROTOCOL)\r |
122 | );\r |
123 | \r |
124 | IsaIoDevice->IsaIo.ResourceList = IsaDeviceResourceList;\r |
c3902377 |
125 | }\r |
126 | \r |
bcd70414 |
127 | /**\r |
128 | Performs an ISA I/O Read Cycle\r |
129 | \r |
6fcb2d91 |
130 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
131 | @param[in] Width Specifies the width of the I/O operation.\r |
132 | @param[in] Offset The offset in ISA I/O space to start the I/O operation. \r |
133 | @param[in] Count The number of I/O operations to perform. \r |
134 | @param[out] Buffer The destination buffer to store the results\r |
bcd70414 |
135 | \r |
6fcb2d91 |
136 | @retval EFI_SUCCESS The data was read from the device sucessfully.\r |
137 | @retval EFI_UNSUPPORTED The Offset is not valid for this device.\r |
138 | @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r |
139 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
bcd70414 |
140 | **/\r |
c3902377 |
141 | EFI_STATUS\r |
142 | EFIAPI\r |
143 | IsaIoIoRead (\r |
6fcb2d91 |
144 | IN EFI_ISA_IO_PROTOCOL *This,\r |
145 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
146 | IN UINT32 Offset,\r |
147 | IN UINTN Count,\r |
148 | OUT VOID *Buffer\r |
c3902377 |
149 | )\r |
c3902377 |
150 | {\r |
151 | EFI_STATUS Status;\r |
152 | ISA_IO_DEVICE *IsaIoDevice;\r |
153 | \r |
154 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
155 | \r |
156 | //\r |
157 | // Verify Isa IO Access\r |
158 | //\r |
159 | Status = IsaIoVerifyAccess (\r |
160 | IsaIoDevice,\r |
161 | IsaAccessTypeIo,\r |
162 | Width,\r |
163 | Count,\r |
6fcb2d91 |
164 | Offset\r |
c3902377 |
165 | );\r |
166 | if (EFI_ERROR (Status)) {\r |
167 | return Status;\r |
168 | }\r |
6fcb2d91 |
169 | \r |
c3902377 |
170 | Status = IsaIoDevice->PciIo->Io.Read (\r |
171 | IsaIoDevice->PciIo,\r |
172 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
173 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
174 | Offset,\r |
175 | Count,\r |
176 | Buffer\r |
177 | );\r |
178 | \r |
179 | if (EFI_ERROR (Status)) {\r |
180 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
181 | }\r |
182 | \r |
183 | return Status;\r |
184 | }\r |
185 | \r |
bcd70414 |
186 | /**\r |
187 | Performs an ISA I/O Write Cycle\r |
188 | \r |
6fcb2d91 |
189 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
190 | @param[in] Width Specifies the width of the I/O operation.\r |
191 | @param[in] Offset The offset in ISA I/O space to start the I/O operation. \r |
192 | @param[in] Count The number of I/O operations to perform. \r |
193 | @param[in] Buffer The source buffer to write data from\r |
bcd70414 |
194 | \r |
6fcb2d91 |
195 | @retval EFI_SUCCESS The data was writen to the device sucessfully.\r |
196 | @retval EFI_UNSUPPORTED The Offset is not valid for this device.\r |
197 | @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r |
198 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
bcd70414 |
199 | **/\r |
c3902377 |
200 | EFI_STATUS\r |
201 | EFIAPI\r |
202 | IsaIoIoWrite (\r |
6fcb2d91 |
203 | IN EFI_ISA_IO_PROTOCOL *This,\r |
204 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
205 | IN UINT32 Offset,\r |
206 | IN UINTN Count,\r |
207 | IN VOID *Buffer\r |
c3902377 |
208 | )\r |
c3902377 |
209 | {\r |
210 | EFI_STATUS Status;\r |
211 | ISA_IO_DEVICE *IsaIoDevice;\r |
212 | \r |
213 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
214 | \r |
215 | //\r |
216 | // Verify Isa IO Access\r |
217 | //\r |
218 | Status = IsaIoVerifyAccess (\r |
219 | IsaIoDevice,\r |
220 | IsaAccessTypeIo,\r |
221 | Width,\r |
222 | Count,\r |
6fcb2d91 |
223 | Offset\r |
c3902377 |
224 | );\r |
225 | if (EFI_ERROR (Status)) {\r |
226 | return Status;\r |
227 | }\r |
6fcb2d91 |
228 | \r |
c3902377 |
229 | Status = IsaIoDevice->PciIo->Io.Write (\r |
230 | IsaIoDevice->PciIo,\r |
231 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
232 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
233 | Offset,\r |
234 | Count,\r |
235 | Buffer\r |
236 | );\r |
237 | \r |
238 | if (EFI_ERROR (Status)) {\r |
239 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
240 | }\r |
241 | \r |
242 | return Status;\r |
243 | }\r |
244 | \r |
bcd70414 |
245 | /**\r |
6fcb2d91 |
246 | Writes an 8-bit I/O Port\r |
bcd70414 |
247 | \r |
6fcb2d91 |
248 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
249 | @param[in] Offset The offset in ISA IO space to start the IO operation. \r |
250 | @param[in] Value The data to write port.\r |
bcd70414 |
251 | \r |
6fcb2d91 |
252 | @retval EFI_SUCCESS Success.\r |
253 | @retval EFI_INVALID_PARAMETER Parameter is invalid.\r |
254 | @retval EFI_UNSUPPORTED The address range specified by Offset is not valid.\r |
255 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
bcd70414 |
256 | **/\r |
c3902377 |
257 | EFI_STATUS\r |
258 | WritePort (\r |
6fcb2d91 |
259 | IN EFI_ISA_IO_PROTOCOL *This,\r |
260 | IN UINT32 Offset,\r |
261 | IN UINT8 Value\r |
c3902377 |
262 | )\r |
c3902377 |
263 | {\r |
264 | EFI_STATUS Status;\r |
265 | ISA_IO_DEVICE *IsaIoDevice;\r |
266 | \r |
267 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
268 | \r |
c3902377 |
269 | Status = IsaIoDevice->PciIo->Io.Write (\r |
270 | IsaIoDevice->PciIo,\r |
271 | EfiPciIoWidthUint8,\r |
272 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
273 | Offset,\r |
274 | 1,\r |
275 | &Value\r |
276 | );\r |
277 | if (EFI_ERROR (Status)) {\r |
278 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
279 | return Status;\r |
280 | }\r |
281 | \r |
282 | gBS->Stall (50);\r |
283 | \r |
284 | return EFI_SUCCESS;\r |
285 | }\r |
286 | \r |
bcd70414 |
287 | /**\r |
288 | Writes I/O operation base address and count number to a 8 bit I/O Port.\r |
289 | \r |
6fcb2d91 |
290 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
291 | @param[in] AddrOffset The address' offset.\r |
292 | @param[in] PageOffset The page's offest.\r |
293 | @param[in] CountOffset The count's offset.\r |
294 | @param[in] BaseAddress The base address.\r |
295 | @param[in] Count The number of I/O operations to perform. \r |
bcd70414 |
296 | \r |
6fcb2d91 |
297 | @retval EFI_SUCCESS Success.\r |
298 | @retval EFI_INVALID_PARAMETER Parameter is invalid.\r |
299 | @retval EFI_UNSUPPORTED The address range specified by these Offsets and Count is not valid.\r |
300 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
bcd70414 |
301 | **/\r |
c3902377 |
302 | EFI_STATUS\r |
303 | WriteDmaPort (\r |
6fcb2d91 |
304 | IN EFI_ISA_IO_PROTOCOL *This,\r |
305 | IN UINT32 AddrOffset,\r |
306 | IN UINT32 PageOffset,\r |
307 | IN UINT32 CountOffset,\r |
308 | IN UINT32 BaseAddress,\r |
309 | IN UINT16 Count\r |
c3902377 |
310 | )\r |
c3902377 |
311 | {\r |
312 | EFI_STATUS Status;\r |
313 | \r |
314 | Status = WritePort (This, AddrOffset, (UINT8) (BaseAddress & 0xff));\r |
315 | if (EFI_ERROR (Status)) {\r |
316 | return Status;\r |
317 | }\r |
318 | \r |
319 | Status = WritePort (This, AddrOffset, (UINT8) ((BaseAddress >> 8) & 0xff));\r |
320 | if (EFI_ERROR (Status)) {\r |
321 | return Status;\r |
322 | }\r |
323 | \r |
324 | Status = WritePort (This, PageOffset, (UINT8) ((BaseAddress >> 16) & 0xff));\r |
325 | if (EFI_ERROR (Status)) {\r |
326 | return Status;\r |
327 | }\r |
328 | \r |
329 | Status = WritePort (This, CountOffset, (UINT8) (Count & 0xff));\r |
330 | if (EFI_ERROR (Status)) {\r |
331 | return Status;\r |
332 | }\r |
333 | \r |
334 | Status = WritePort (This, CountOffset, (UINT8) ((Count >> 8) & 0xff));\r |
6fcb2d91 |
335 | return Status;\r |
c3902377 |
336 | }\r |
337 | \r |
bcd70414 |
338 | /**\r |
339 | Unmaps a memory region for DMA\r |
340 | \r |
6fcb2d91 |
341 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
342 | @param[in] Mapping The mapping value returned from EFI_ISA_IO.Map().\r |
bcd70414 |
343 | \r |
6fcb2d91 |
344 | @retval EFI_SUCCESS The range was unmapped.\r |
345 | @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\r |
bcd70414 |
346 | **/\r |
c3902377 |
347 | EFI_STATUS\r |
348 | EFIAPI\r |
349 | IsaIoUnmap (\r |
6fcb2d91 |
350 | IN EFI_ISA_IO_PROTOCOL *This,\r |
351 | IN VOID *Mapping\r |
c3902377 |
352 | )\r |
c3902377 |
353 | {\r |
354 | ISA_MAP_INFO *IsaMapInfo;\r |
355 | \r |
356 | //\r |
357 | // Unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.\r |
358 | //\r |
359 | if (!FeaturePcdGet (PcdIsaBusSupportDma)) {\r |
360 | return EFI_UNSUPPORTED;\r |
361 | }\r |
362 | \r |
363 | //\r |
364 | // See if the Map() operation associated with this Unmap() required a mapping\r |
365 | // buffer.If a mapping buffer was not required, then this function simply\r |
366 | // returns EFI_SUCCESS.\r |
367 | //\r |
368 | if (Mapping != NULL) {\r |
369 | //\r |
370 | // Get the MAP_INFO structure from Mapping\r |
371 | //\r |
372 | IsaMapInfo = (ISA_MAP_INFO *) Mapping;\r |
373 | \r |
374 | //\r |
375 | // If this is a write operation from the Agent's point of view,\r |
376 | // then copy the contents of the mapped buffer into the real buffer\r |
377 | // so the processor can read the contents of the real buffer.\r |
378 | //\r |
379 | if (IsaMapInfo->Operation == EfiIsaIoOperationBusMasterWrite) {\r |
380 | CopyMem (\r |
381 | (VOID *) (UINTN) IsaMapInfo->HostAddress,\r |
382 | (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,\r |
383 | IsaMapInfo->NumberOfBytes\r |
384 | );\r |
385 | }\r |
386 | //\r |
387 | // Free the mapped buffer and the MAP_INFO structure.\r |
388 | //\r |
389 | gBS->FreePages (IsaMapInfo->MappedHostAddress, IsaMapInfo->NumberOfPages);\r |
f423cbf1 |
390 | FreePool (IsaMapInfo);\r |
c3902377 |
391 | }\r |
392 | \r |
393 | return EFI_SUCCESS;\r |
394 | }\r |
395 | \r |
bcd70414 |
396 | /**\r |
6fcb2d91 |
397 | Flushes any posted write data to the system memory.\r |
bcd70414 |
398 | \r |
6fcb2d91 |
399 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
bcd70414 |
400 | \r |
6fcb2d91 |
401 | @retval EFI_SUCCESS The buffers were flushed.\r |
402 | @retval EFI_DEVICE_ERROR The buffers were not flushed due to a hardware error.\r |
bcd70414 |
403 | **/\r |
c3902377 |
404 | EFI_STATUS\r |
405 | EFIAPI\r |
406 | IsaIoFlush (\r |
6fcb2d91 |
407 | IN EFI_ISA_IO_PROTOCOL *This\r |
c3902377 |
408 | )\r |
c3902377 |
409 | {\r |
410 | EFI_STATUS Status;\r |
411 | ISA_IO_DEVICE *IsaIoDevice;\r |
412 | \r |
413 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
414 | \r |
c3902377 |
415 | Status = IsaIoDevice->PciIo->Flush (IsaIoDevice->PciIo);\r |
416 | \r |
417 | if (EFI_ERROR (Status)) {\r |
418 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
419 | }\r |
420 | \r |
421 | return Status;\r |
422 | }\r |
423 | \r |
bcd70414 |
424 | /**\r |
425 | Verifies access to an ISA device\r |
426 | \r |
6fcb2d91 |
427 | @param[in] IsaIoDevice The ISA device to be verified.\r |
428 | @param[in] Type The Access type. The input must be either IsaAccessTypeMem or IsaAccessTypeIo.\r |
429 | @param[in] Width The width of the memory operation.\r |
430 | @param[in] Count The number of memory operations to perform. \r |
431 | @param[in] Offset The offset in ISA memory space to start the memory operation. \r |
bcd70414 |
432 | \r |
6fcb2d91 |
433 | @retval EFI_SUCCESS Verify success.\r |
434 | @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.\r |
435 | @retval EFI_UNSUPPORTED The device ont support the access type.\r |
bcd70414 |
436 | **/\r |
c3902377 |
437 | EFI_STATUS\r |
438 | IsaIoVerifyAccess (\r |
6fcb2d91 |
439 | IN ISA_IO_DEVICE *IsaIoDevice,\r |
440 | IN ISA_ACCESS_TYPE Type,\r |
441 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
442 | IN UINTN Count,\r |
443 | IN UINT32 Offset\r |
c3902377 |
444 | )\r |
c3902377 |
445 | {\r |
446 | EFI_ISA_ACPI_RESOURCE *Item;\r |
447 | EFI_STATUS Status;\r |
448 | \r |
449 | if (Width < EfiIsaIoWidthUint8 ||\r |
450 | Width >= EfiIsaIoWidthMaximum ||\r |
451 | Width == EfiIsaIoWidthReserved ||\r |
452 | Width == EfiIsaIoWidthFifoReserved ||\r |
453 | Width == EfiIsaIoWidthFillReserved\r |
454 | ) {\r |
455 | return EFI_INVALID_PARAMETER;\r |
456 | }\r |
457 | \r |
458 | //\r |
459 | // If Width is EfiIsaIoWidthFifoUintX then convert to EfiIsaIoWidthUintX\r |
460 | // If Width is EfiIsaIoWidthFillUintX then convert to EfiIsaIoWidthUintX\r |
461 | //\r |
6fcb2d91 |
462 | if (Width >= EfiIsaIoWidthFifoUint8 && Width < EfiIsaIoWidthFifoReserved) {\r |
c3902377 |
463 | Count = 1;\r |
464 | }\r |
465 | \r |
466 | Width = (EFI_ISA_IO_PROTOCOL_WIDTH) (Width & 0x03);\r |
467 | \r |
468 | Status = EFI_UNSUPPORTED;\r |
469 | Item = IsaIoDevice->IsaIo.ResourceList->ResourceItem;\r |
470 | while (Item->Type != EfiIsaAcpiResourceEndOfList) {\r |
471 | if ((Type == IsaAccessTypeMem && Item->Type == EfiIsaAcpiResourceMemory) ||\r |
6fcb2d91 |
472 | (Type == IsaAccessTypeIo && Item->Type == EfiIsaAcpiResourceIo)) {\r |
473 | if (Offset >= Item->StartRange && (Offset + Count * (UINT32)(1 << Width)) - 1 <= Item->EndRange) {\r |
c3902377 |
474 | return EFI_SUCCESS;\r |
475 | }\r |
476 | \r |
6fcb2d91 |
477 | if (Offset >= Item->StartRange && Offset <= Item->EndRange) {\r |
c3902377 |
478 | Status = EFI_INVALID_PARAMETER;\r |
479 | }\r |
480 | }\r |
481 | \r |
482 | Item++;\r |
483 | }\r |
484 | \r |
485 | return Status;\r |
486 | }\r |
487 | \r |
bcd70414 |
488 | /**\r |
bcd70414 |
489 | Performs an ISA Memory Read Cycle\r |
490 | \r |
6fcb2d91 |
491 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
492 | @param[in] Width Specifies the width of the memory operation.\r |
493 | @param[in] Offset The offset in ISA memory space to start the memory operation. \r |
494 | @param[in] Count The number of memory operations to perform. \r |
495 | @param[out] Buffer The destination buffer to store the results\r |
bcd70414 |
496 | \r |
6fcb2d91 |
497 | @retval EFI_SUCCESS The data was read from the device successfully.\r |
498 | @retval EFI_UNSUPPORTED The Offset is not valid for this device.\r |
499 | @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r |
500 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
bcd70414 |
501 | **/\r |
c3902377 |
502 | EFI_STATUS\r |
503 | EFIAPI\r |
504 | IsaIoMemRead (\r |
6fcb2d91 |
505 | IN EFI_ISA_IO_PROTOCOL *This,\r |
506 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
507 | IN UINT32 Offset,\r |
508 | IN UINTN Count,\r |
509 | OUT VOID *Buffer\r |
c3902377 |
510 | )\r |
c3902377 |
511 | {\r |
512 | EFI_STATUS Status;\r |
513 | ISA_IO_DEVICE *IsaIoDevice;\r |
514 | \r |
515 | //\r |
6fcb2d91 |
516 | // Set Feature Flag PcdIsaBusSupportIsaMemory to FALSE to disable support for\r |
517 | // ISA bus memory read/write operations.\r |
c3902377 |
518 | //\r |
519 | if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {\r |
520 | return EFI_UNSUPPORTED;\r |
521 | }\r |
522 | \r |
523 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
524 | \r |
525 | //\r |
526 | // Verify the Isa Io Access\r |
527 | //\r |
528 | Status = IsaIoVerifyAccess (\r |
529 | IsaIoDevice,\r |
530 | IsaAccessTypeMem,\r |
531 | Width,\r |
532 | Count,\r |
6fcb2d91 |
533 | Offset\r |
c3902377 |
534 | );\r |
535 | if (EFI_ERROR (Status)) {\r |
536 | return Status;\r |
537 | }\r |
6fcb2d91 |
538 | \r |
c3902377 |
539 | Status = IsaIoDevice->PciIo->Mem.Read (\r |
540 | IsaIoDevice->PciIo,\r |
541 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
542 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
543 | Offset,\r |
544 | Count,\r |
545 | Buffer\r |
546 | );\r |
547 | \r |
548 | if (EFI_ERROR (Status)) {\r |
549 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
550 | }\r |
551 | \r |
552 | return Status;\r |
553 | }\r |
554 | \r |
bcd70414 |
555 | /**\r |
556 | Performs an ISA Memory Write Cycle\r |
557 | \r |
6fcb2d91 |
558 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance. \r |
559 | @param[in] Width Specifies the width of the memory operation.\r |
560 | @param[in] Offset The offset in ISA memory space to start the memory operation. \r |
561 | @param[in] Count The number of memory operations to perform. \r |
562 | @param[in] Buffer The source buffer to write data from\r |
bcd70414 |
563 | \r |
6fcb2d91 |
564 | @retval EFI_SUCCESS The data was written to the device sucessfully.\r |
565 | @retval EFI_UNSUPPORTED The Offset is not valid for this device.\r |
566 | @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r |
567 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
bcd70414 |
568 | **/\r |
c3902377 |
569 | EFI_STATUS\r |
570 | EFIAPI\r |
571 | IsaIoMemWrite (\r |
6fcb2d91 |
572 | IN EFI_ISA_IO_PROTOCOL *This,\r |
573 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
574 | IN UINT32 Offset,\r |
575 | IN UINTN Count,\r |
576 | IN VOID *Buffer\r |
c3902377 |
577 | )\r |
c3902377 |
578 | {\r |
579 | EFI_STATUS Status;\r |
580 | ISA_IO_DEVICE *IsaIoDevice;\r |
581 | \r |
582 | //\r |
6fcb2d91 |
583 | // Set Feature Flag PcdIsaBusSupportIsaMemory to FALSE to disable support for\r |
584 | // ISA bus memory read/write operations.\r |
c3902377 |
585 | //\r |
586 | if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {\r |
587 | return EFI_UNSUPPORTED;\r |
588 | }\r |
589 | \r |
590 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
591 | \r |
592 | //\r |
593 | // Verify Isa IO Access\r |
594 | //\r |
595 | Status = IsaIoVerifyAccess (\r |
596 | IsaIoDevice,\r |
597 | IsaAccessTypeMem,\r |
598 | Width,\r |
599 | Count,\r |
6fcb2d91 |
600 | Offset\r |
c3902377 |
601 | );\r |
602 | if (EFI_ERROR (Status)) {\r |
603 | return Status;\r |
604 | }\r |
6fcb2d91 |
605 | \r |
c3902377 |
606 | Status = IsaIoDevice->PciIo->Mem.Write (\r |
607 | IsaIoDevice->PciIo,\r |
608 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
609 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
610 | Offset,\r |
611 | Count,\r |
612 | Buffer\r |
613 | );\r |
614 | \r |
615 | if (EFI_ERROR (Status)) {\r |
616 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
617 | }\r |
618 | \r |
619 | return Status;\r |
620 | }\r |
621 | \r |
bcd70414 |
622 | /**\r |
6fcb2d91 |
623 | Copy one region of ISA memory space to another region of ISA memory space on the ISA controller.\r |
624 | \r |
625 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
626 | @param[in] Width Specifies the width of the memory copy operation.\r |
627 | @param[out] DestOffset The offset of the destination \r |
628 | @param[in] SrcOffset The offset of the source\r |
629 | @param[in] Count The number of memory copy operations to perform\r |
630 | \r |
631 | @retval EFI_SUCCESS The data was copied sucessfully.\r |
632 | @retval EFI_UNSUPPORTED The DestOffset or SrcOffset is not valid for this device.\r |
633 | @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r |
634 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
bcd70414 |
635 | **/\r |
c3902377 |
636 | EFI_STATUS\r |
637 | EFIAPI\r |
638 | IsaIoCopyMem (\r |
6fcb2d91 |
639 | IN EFI_ISA_IO_PROTOCOL *This,\r |
640 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
641 | IN UINT32 DestOffset,\r |
642 | IN UINT32 SrcOffset,\r |
643 | IN UINTN Count\r |
c3902377 |
644 | )\r |
c3902377 |
645 | {\r |
646 | EFI_STATUS Status;\r |
647 | ISA_IO_DEVICE *IsaIoDevice;\r |
648 | \r |
649 | //\r |
6fcb2d91 |
650 | // Set Feature Flag PcdIsaBusSupportIsaMemory to FALSE to disable support for\r |
651 | // ISA bus memory read/write operations.\r |
c3902377 |
652 | //\r |
653 | if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {\r |
654 | return EFI_UNSUPPORTED;\r |
655 | }\r |
656 | \r |
657 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
658 | \r |
659 | //\r |
660 | // Verify Isa IO Access for destination and source\r |
661 | //\r |
662 | Status = IsaIoVerifyAccess (\r |
663 | IsaIoDevice,\r |
664 | IsaAccessTypeMem,\r |
665 | Width,\r |
666 | Count,\r |
6fcb2d91 |
667 | DestOffset\r |
c3902377 |
668 | );\r |
669 | if (EFI_ERROR (Status)) {\r |
670 | return Status;\r |
671 | }\r |
672 | \r |
673 | Status = IsaIoVerifyAccess (\r |
674 | IsaIoDevice,\r |
675 | IsaAccessTypeMem,\r |
676 | Width,\r |
677 | Count,\r |
6fcb2d91 |
678 | SrcOffset\r |
c3902377 |
679 | );\r |
680 | if (EFI_ERROR (Status)) {\r |
681 | return Status;\r |
682 | }\r |
6fcb2d91 |
683 | \r |
c3902377 |
684 | Status = IsaIoDevice->PciIo->CopyMem (\r |
685 | IsaIoDevice->PciIo,\r |
686 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
687 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
688 | DestOffset,\r |
689 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
690 | SrcOffset,\r |
691 | Count\r |
692 | );\r |
693 | \r |
694 | if (EFI_ERROR (Status)) {\r |
695 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
696 | }\r |
697 | \r |
698 | return Status;\r |
699 | }\r |
700 | \r |
bcd70414 |
701 | /**\r |
702 | Maps a memory region for DMA, note this implementation\r |
703 | only supports slave read/write operation to save code size.\r |
704 | \r |
6fcb2d91 |
705 | @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
706 | @param Operation Indicates the type of DMA (slave or bus master), and if \r |
707 | the DMA operation is going to read or write to system memory. \r |
708 | @param ChannelNumber The slave channel number to use for this DMA operation. \r |
709 | If Operation and ChannelAttributes shows that this device \r |
710 | performs bus mastering DMA, then this field is ignored. \r |
711 | The legal range for this field is 0..7. \r |
712 | @param ChannelAttributes The attributes of the DMA channel to use for this DMA operation\r |
713 | @param HostAddress The system memory address to map to the device. \r |
714 | @param NumberOfBytes On input the number of bytes to map. On output the number \r |
715 | of bytes that were mapped.\r |
716 | @param DeviceAddress The resulting map address for the bus master device to use \r |
717 | to access the hosts HostAddress. \r |
718 | @param Mapping A resulting value to pass to EFI_ISA_IO.Unmap().\r |
719 | \r |
720 | @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r |
721 | @retval EFI_INVALID_PARAMETER The Operation or HostAddress is undefined.\r |
722 | @retval EFI_UNSUPPORTED The HostAddress can not be mapped as a common buffer.\r |
723 | @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r |
724 | @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r |
bcd70414 |
725 | **/\r |
c3902377 |
726 | EFI_STATUS\r |
6fcb2d91 |
727 | IsaIoMapOnlySupportSlaveReadWrite (\r |
728 | IN EFI_ISA_IO_PROTOCOL *This,\r |
729 | IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,\r |
730 | IN UINT8 ChannelNumber OPTIONAL,\r |
731 | IN UINT32 ChannelAttributes,\r |
732 | IN VOID *HostAddress,\r |
733 | IN OUT UINTN *NumberOfBytes,\r |
734 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
735 | OUT VOID **Mapping\r |
c3902377 |
736 | )\r |
c3902377 |
737 | {\r |
738 | EFI_STATUS Status;\r |
739 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
740 | ISA_MAP_INFO *IsaMapInfo;\r |
741 | UINT8 DmaMode;\r |
742 | UINTN MaxNumberOfBytes;\r |
743 | UINT32 BaseAddress;\r |
744 | UINT16 Count;\r |
c3902377 |
745 | UINT8 DmaMask;\r |
746 | UINT8 DmaClear;\r |
747 | UINT8 DmaChannelMode;\r |
748 | \r |
749 | if ((NULL == This) ||\r |
750 | (NULL == HostAddress) ||\r |
751 | (NULL == NumberOfBytes) ||\r |
752 | (NULL == DeviceAddress) ||\r |
753 | (NULL == Mapping)\r |
754 | ) {\r |
755 | return EFI_INVALID_PARAMETER;\r |
756 | }\r |
757 | \r |
c3902377 |
758 | //\r |
759 | // Initialize the return values to their defaults\r |
760 | //\r |
761 | *Mapping = NULL;\r |
762 | \r |
763 | //\r |
764 | // Make sure the Operation parameter is valid.\r |
765 | // Light IsaIo only supports two operations.\r |
766 | //\r |
767 | if (!(Operation == EfiIsaIoOperationSlaveRead || \r |
768 | Operation == EfiIsaIoOperationSlaveWrite)) {\r |
769 | return EFI_INVALID_PARAMETER;\r |
770 | }\r |
771 | \r |
772 | if (ChannelNumber >= 4) {\r |
773 | //\r |
774 | // The Light IsaIo doesn't support channelNumber larger than 4.\r |
775 | //\r |
776 | return EFI_INVALID_PARAMETER;\r |
777 | }\r |
778 | \r |
779 | //\r |
780 | // Map the HostAddress to a DeviceAddress.\r |
781 | //\r |
782 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;\r |
6fcb2d91 |
783 | if ((PhysicalAddress + *NumberOfBytes) > ISA_MAX_MEMORY_ADDRESS) {\r |
c3902377 |
784 | //\r |
785 | // Common Buffer operations can not be remapped. If the common buffer\r |
786 | // is above 16MB, then it is not possible to generate a mapping, so return\r |
787 | // an error.\r |
788 | //\r |
789 | if (Operation == EfiIsaIoOperationBusMasterCommonBuffer) {\r |
790 | return EFI_UNSUPPORTED;\r |
791 | }\r |
792 | //\r |
793 | // Allocate an ISA_MAP_INFO structure to remember the mapping when Unmap()\r |
794 | // is called later.\r |
795 | //\r |
796 | IsaMapInfo = AllocatePool (sizeof (ISA_MAP_INFO));\r |
797 | if (IsaMapInfo == NULL) {\r |
798 | *NumberOfBytes = 0;\r |
799 | return EFI_OUT_OF_RESOURCES;\r |
800 | }\r |
801 | //\r |
802 | // Return a pointer to the MAP_INFO structure in Mapping\r |
803 | //\r |
804 | *Mapping = IsaMapInfo;\r |
805 | \r |
806 | //\r |
807 | // Initialize the MAP_INFO structure\r |
808 | //\r |
809 | IsaMapInfo->Operation = Operation;\r |
810 | IsaMapInfo->NumberOfBytes = *NumberOfBytes;\r |
811 | IsaMapInfo->NumberOfPages = EFI_SIZE_TO_PAGES (*NumberOfBytes);\r |
812 | IsaMapInfo->HostAddress = PhysicalAddress;\r |
813 | IsaMapInfo->MappedHostAddress = ISA_MAX_MEMORY_ADDRESS - 1;\r |
814 | \r |
815 | //\r |
816 | // Allocate a buffer below 16MB to map the transfer to.\r |
817 | //\r |
818 | Status = gBS->AllocatePages (\r |
819 | AllocateMaxAddress,\r |
820 | EfiBootServicesData,\r |
821 | IsaMapInfo->NumberOfPages,\r |
822 | &IsaMapInfo->MappedHostAddress\r |
823 | );\r |
824 | if (EFI_ERROR (Status)) {\r |
f423cbf1 |
825 | FreePool (IsaMapInfo);\r |
c3902377 |
826 | *NumberOfBytes = 0;\r |
827 | *Mapping = NULL;\r |
828 | return Status;\r |
829 | }\r |
830 | //\r |
831 | // If this is a read operation from the DMA agents's point of view,\r |
832 | // then copy the contents of the real buffer into the mapped buffer\r |
833 | // so the DMA agent can read the contents of the real buffer.\r |
834 | //\r |
835 | if (Operation == EfiIsaIoOperationSlaveRead) {\r |
836 | CopyMem (\r |
837 | (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,\r |
838 | (VOID *) (UINTN) IsaMapInfo->HostAddress,\r |
839 | IsaMapInfo->NumberOfBytes\r |
840 | );\r |
841 | }\r |
842 | //\r |
843 | // The DeviceAddress is the address of the maped buffer below 16 MB\r |
844 | //\r |
845 | *DeviceAddress = IsaMapInfo->MappedHostAddress;\r |
846 | } else {\r |
847 | //\r |
848 | // The transfer is below 16 MB, so the DeviceAddress is simply the\r |
849 | // HostAddress\r |
850 | //\r |
851 | *DeviceAddress = PhysicalAddress;\r |
852 | }\r |
853 | \r |
854 | //\r |
855 | // Figure out what to program into the DMA Channel Mode Register\r |
856 | //\r |
857 | DmaMode = (UINT8) (B_8237_DMA_CHMODE_INCREMENT | (ChannelNumber & 0x03));\r |
858 | if (Operation == EfiIsaIoOperationSlaveRead) {\r |
859 | DmaMode |= V_8237_DMA_CHMODE_MEM2IO;\r |
860 | } else {\r |
861 | DmaMode |= V_8237_DMA_CHMODE_IO2MEM;\r |
862 | }\r |
863 | //\r |
864 | // We only support EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE in simplified IsaIo\r |
865 | //\r |
866 | DmaMode |= V_8237_DMA_CHMODE_SINGLE;\r |
867 | \r |
868 | //\r |
869 | // A Slave DMA transfer can not cross a 64K boundary.\r |
870 | // Compute *NumberOfBytes based on this restriction.\r |
871 | //\r |
872 | MaxNumberOfBytes = 0x10000 - ((UINT32) (*DeviceAddress) & 0xffff);\r |
873 | if (*NumberOfBytes > MaxNumberOfBytes) {\r |
874 | *NumberOfBytes = MaxNumberOfBytes;\r |
875 | }\r |
876 | //\r |
877 | // Compute the values to program into the BaseAddress and Count registers\r |
878 | // of the Slave DMA controller\r |
879 | //\r |
880 | BaseAddress = (UINT32) (*DeviceAddress);\r |
881 | Count = (UINT16) (*NumberOfBytes - 1);\r |
882 | //\r |
883 | // Program the DMA Write Single Mask Register for ChannelNumber\r |
884 | // Clear the DMA Byte Pointer Register\r |
885 | //\r |
886 | DmaMask = R_8237_DMA_WRSMSK_CH0_3;\r |
887 | DmaClear = R_8237_DMA_CBPR_CH0_3;\r |
888 | DmaChannelMode = R_8237_DMA_CHMODE_CH0_3;\r |
889 | \r |
890 | Status = WritePort (\r |
891 | This,\r |
892 | DmaMask,\r |
893 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
894 | );\r |
895 | if (EFI_ERROR (Status)) {\r |
896 | return Status;\r |
897 | }\r |
898 | \r |
899 | Status = WritePort (\r |
900 | This,\r |
901 | DmaClear,\r |
902 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
903 | );\r |
904 | if (EFI_ERROR (Status)) {\r |
905 | return Status;\r |
906 | }\r |
907 | \r |
908 | Status = WritePort (This, DmaChannelMode, DmaMode);\r |
909 | if (EFI_ERROR (Status)) {\r |
910 | return Status;\r |
911 | }\r |
912 | \r |
913 | Status = WriteDmaPort (\r |
914 | This,\r |
6fcb2d91 |
915 | mDmaRegisters[ChannelNumber].Address,\r |
916 | mDmaRegisters[ChannelNumber].Page,\r |
917 | mDmaRegisters[ChannelNumber].Count,\r |
c3902377 |
918 | BaseAddress,\r |
919 | Count\r |
920 | );\r |
921 | if (EFI_ERROR (Status)) {\r |
922 | return Status;\r |
923 | }\r |
924 | \r |
925 | Status = WritePort (\r |
926 | This,\r |
927 | DmaMask,\r |
928 | (UINT8) (ChannelNumber & 0x03)\r |
929 | );\r |
930 | if (EFI_ERROR (Status)) {\r |
931 | return Status;\r |
932 | }\r |
933 | \r |
934 | return EFI_SUCCESS;\r |
935 | }\r |
936 | \r |
bcd70414 |
937 | /**\r |
938 | Maps a memory region for DMA. This implementation implement the \r |
939 | the full mapping support.\r |
940 | \r |
6fcb2d91 |
941 | @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
942 | @param Operation Indicates the type of DMA (slave or bus master), and if \r |
943 | the DMA operation is going to read or write to system memory. \r |
944 | @param ChannelNumber The slave channel number to use for this DMA operation. \r |
945 | If Operation and ChannelAttributes shows that this device \r |
946 | performs bus mastering DMA, then this field is ignored. \r |
947 | The legal range for this field is 0..7. \r |
948 | @param ChannelAttributes The attributes of the DMA channel to use for this DMA operation\r |
949 | @param HostAddress The system memory address to map to the device. \r |
950 | @param NumberOfBytes On input the number of bytes to map. On output the number \r |
951 | of bytes that were mapped.\r |
952 | @param DeviceAddress The resulting map address for the bus master device to use \r |
953 | to access the hosts HostAddress. \r |
954 | @param Mapping A resulting value to pass to EFI_ISA_IO.Unmap().\r |
bcd70414 |
955 | \r |
956 | @retval EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.\r |
957 | @retval EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.\r |
958 | @retval EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.\r |
959 | @retval EFI_DEVICE_ERROR - The system hardware could not map the requested address.\r |
960 | @retval EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.\r |
bcd70414 |
961 | **/\r |
c3902377 |
962 | EFI_STATUS\r |
6fcb2d91 |
963 | IsaIoMapFullSupport (\r |
c3902377 |
964 | IN EFI_ISA_IO_PROTOCOL *This,\r |
965 | IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,\r |
966 | IN UINT8 ChannelNumber OPTIONAL,\r |
967 | IN UINT32 ChannelAttributes,\r |
968 | IN VOID *HostAddress,\r |
969 | IN OUT UINTN *NumberOfBytes,\r |
970 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
971 | OUT VOID **Mapping\r |
972 | )\r |
c3902377 |
973 | {\r |
974 | EFI_STATUS Status;\r |
975 | BOOLEAN Master;\r |
976 | BOOLEAN Read;\r |
977 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
978 | ISA_MAP_INFO *IsaMapInfo;\r |
979 | UINT8 DmaMode;\r |
980 | UINTN MaxNumberOfBytes;\r |
981 | UINT32 BaseAddress;\r |
982 | UINT16 Count;\r |
c3902377 |
983 | UINT8 DmaMask;\r |
984 | UINT8 DmaClear;\r |
985 | UINT8 DmaChannelMode;\r |
986 | \r |
987 | if ((NULL == This) ||\r |
988 | (NULL == HostAddress) ||\r |
989 | (NULL == NumberOfBytes) ||\r |
990 | (NULL == DeviceAddress) ||\r |
991 | (NULL == Mapping)\r |
992 | ) {\r |
993 | return EFI_INVALID_PARAMETER;\r |
994 | }\r |
995 | \r |
c3902377 |
996 | //\r |
997 | // Initialize the return values to their defaults\r |
998 | //\r |
999 | *Mapping = NULL;\r |
1000 | \r |
1001 | //\r |
1002 | // Make sure the Operation parameter is valid\r |
1003 | //\r |
1004 | if (Operation < 0 || Operation >= EfiIsaIoOperationMaximum) {\r |
1005 | return EFI_INVALID_PARAMETER;\r |
1006 | }\r |
aa950314 |
1007 | \r |
1008 | if (ChannelNumber >= 8) {\r |
1009 | return EFI_INVALID_PARAMETER;\r |
1010 | }\r |
1011 | \r |
c3902377 |
1012 | //\r |
1013 | // See if this is a Slave DMA Operation\r |
1014 | //\r |
1015 | Master = TRUE;\r |
1016 | Read = FALSE;\r |
1017 | if (Operation == EfiIsaIoOperationSlaveRead) {\r |
1018 | Operation = EfiIsaIoOperationBusMasterRead;\r |
1019 | Master = FALSE;\r |
1020 | Read = TRUE;\r |
1021 | }\r |
1022 | \r |
1023 | if (Operation == EfiIsaIoOperationSlaveWrite) {\r |
1024 | Operation = EfiIsaIoOperationBusMasterWrite;\r |
1025 | Master = FALSE;\r |
1026 | Read = FALSE;\r |
1027 | }\r |
1028 | \r |
1029 | if (!Master) {\r |
1030 | //\r |
1031 | // Make sure that ChannelNumber is a valid channel number\r |
1032 | // Channel 4 is used to cascade, so it is illegal.\r |
1033 | //\r |
1034 | if (ChannelNumber == 4 || ChannelNumber > 7) {\r |
1035 | return EFI_INVALID_PARAMETER;\r |
1036 | }\r |
1037 | //\r |
1038 | // This implementation only support COMPATIBLE DMA Transfers\r |
1039 | //\r |
1040 | if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_COMPATIBLE)) {\r |
1041 | return EFI_INVALID_PARAMETER;\r |
1042 | }\r |
1043 | \r |
1044 | if (ChannelAttributes &\r |
1045 | (\r |
1046 | EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_A |\r |
1047 | EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_B |\r |
1048 | EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_C\r |
1049 | )\r |
1050 | ) {\r |
1051 | return EFI_INVALID_PARAMETER;\r |
1052 | }\r |
1053 | \r |
1054 | if (ChannelNumber < 4) {\r |
1055 | //\r |
1056 | // If this is Channel 0..3, then the width must be 8 bit\r |
1057 | //\r |
1058 | if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8) ||\r |
1059 | (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16)\r |
1060 | ) {\r |
1061 | return EFI_INVALID_PARAMETER;\r |
1062 | }\r |
1063 | } else {\r |
1064 | //\r |
1065 | // If this is Channel 4..7, then the width must be 16 bit\r |
1066 | //\r |
1067 | if ((ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8) ||\r |
1068 | (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16))\r |
1069 | ) {\r |
1070 | return EFI_INVALID_PARAMETER;\r |
1071 | }\r |
1072 | }\r |
1073 | //\r |
1074 | // Either Demand Mode or Single Mode must be selected, but not both\r |
1075 | //\r |
1076 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE) {\r |
1077 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE) {\r |
1078 | return EFI_INVALID_PARAMETER;\r |
1079 | }\r |
1080 | } else {\r |
1081 | if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE)) {\r |
1082 | return EFI_INVALID_PARAMETER;\r |
1083 | }\r |
1084 | }\r |
1085 | }\r |
1086 | //\r |
1087 | // Map the HostAddress to a DeviceAddress.\r |
1088 | //\r |
1089 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;\r |
1090 | if ((PhysicalAddress +*NumberOfBytes) > ISA_MAX_MEMORY_ADDRESS) {\r |
1091 | //\r |
1092 | // Common Buffer operations can not be remapped. If the common buffer\r |
1093 | // is above 16MB, then it is not possible to generate a mapping, so return\r |
1094 | // an error.\r |
1095 | //\r |
1096 | if (Operation == EfiIsaIoOperationBusMasterCommonBuffer) {\r |
1097 | return EFI_UNSUPPORTED;\r |
1098 | }\r |
1099 | //\r |
1100 | // Allocate an ISA_MAP_INFO structure to remember the mapping when Unmap()\r |
1101 | // is called later.\r |
1102 | //\r |
1103 | IsaMapInfo = AllocatePool (sizeof (ISA_MAP_INFO));\r |
1104 | if (IsaMapInfo == NULL) {\r |
1105 | *NumberOfBytes = 0;\r |
1106 | return EFI_OUT_OF_RESOURCES;\r |
1107 | }\r |
1108 | //\r |
1109 | // Return a pointer to the MAP_INFO structure in Mapping\r |
1110 | //\r |
1111 | *Mapping = IsaMapInfo;\r |
1112 | \r |
1113 | //\r |
1114 | // Initialize the MAP_INFO structure\r |
1115 | //\r |
1116 | IsaMapInfo->Operation = Operation;\r |
1117 | IsaMapInfo->NumberOfBytes = *NumberOfBytes;\r |
1118 | IsaMapInfo->NumberOfPages = EFI_SIZE_TO_PAGES (*NumberOfBytes);\r |
1119 | IsaMapInfo->HostAddress = PhysicalAddress;\r |
1120 | IsaMapInfo->MappedHostAddress = ISA_MAX_MEMORY_ADDRESS - 1;\r |
1121 | \r |
1122 | //\r |
1123 | // Allocate a buffer below 16MB to map the transfer to.\r |
1124 | //\r |
1125 | Status = gBS->AllocatePages (\r |
1126 | AllocateMaxAddress,\r |
1127 | EfiBootServicesData,\r |
1128 | IsaMapInfo->NumberOfPages,\r |
1129 | &IsaMapInfo->MappedHostAddress\r |
1130 | );\r |
1131 | if (EFI_ERROR (Status)) {\r |
f423cbf1 |
1132 | FreePool (IsaMapInfo);\r |
c3902377 |
1133 | *NumberOfBytes = 0;\r |
1134 | *Mapping = NULL;\r |
1135 | return Status;\r |
1136 | }\r |
1137 | //\r |
1138 | // If this is a read operation from the DMA agents's point of view,\r |
1139 | // then copy the contents of the real buffer into the mapped buffer\r |
1140 | // so the DMA agent can read the contents of the real buffer.\r |
1141 | //\r |
1142 | if (Operation == EfiIsaIoOperationBusMasterRead) {\r |
1143 | CopyMem (\r |
1144 | (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,\r |
1145 | (VOID *) (UINTN) IsaMapInfo->HostAddress,\r |
1146 | IsaMapInfo->NumberOfBytes\r |
1147 | );\r |
1148 | }\r |
1149 | //\r |
1150 | // The DeviceAddress is the address of the maped buffer below 16 MB\r |
1151 | //\r |
1152 | *DeviceAddress = IsaMapInfo->MappedHostAddress;\r |
1153 | } else {\r |
1154 | //\r |
1155 | // The transfer is below 16 MB, so the DeviceAddress is simply the\r |
1156 | // HostAddress\r |
1157 | //\r |
1158 | *DeviceAddress = PhysicalAddress;\r |
1159 | }\r |
1160 | //\r |
1161 | // If this is a Bus Master operation then return\r |
1162 | //\r |
1163 | if (Master) {\r |
1164 | return EFI_SUCCESS;\r |
1165 | }\r |
1166 | //\r |
1167 | // Figure out what to program into the DMA Channel Mode Register\r |
1168 | //\r |
1169 | DmaMode = (UINT8) (B_8237_DMA_CHMODE_INCREMENT | (ChannelNumber & 0x03));\r |
1170 | if (Read) {\r |
1171 | DmaMode |= V_8237_DMA_CHMODE_MEM2IO;\r |
1172 | } else {\r |
1173 | DmaMode |= V_8237_DMA_CHMODE_IO2MEM;\r |
1174 | }\r |
1175 | \r |
1176 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_AUTO_INITIALIZE) {\r |
1177 | DmaMode |= B_8237_DMA_CHMODE_AE;\r |
1178 | }\r |
1179 | \r |
1180 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE) {\r |
1181 | DmaMode |= V_8237_DMA_CHMODE_DEMAND;\r |
1182 | }\r |
1183 | \r |
1184 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE) {\r |
1185 | DmaMode |= V_8237_DMA_CHMODE_SINGLE;\r |
1186 | }\r |
1187 | //\r |
1188 | // A Slave DMA transfer can not cross a 64K boundary.\r |
1189 | // Compute *NumberOfBytes based on this restriction.\r |
1190 | //\r |
1191 | MaxNumberOfBytes = 0x10000 - ((UINT32) (*DeviceAddress) & 0xffff);\r |
1192 | if (*NumberOfBytes > MaxNumberOfBytes) {\r |
1193 | *NumberOfBytes = MaxNumberOfBytes;\r |
1194 | }\r |
1195 | //\r |
1196 | // Compute the values to program into the BaseAddress and Count registers\r |
1197 | // of the Slave DMA controller\r |
1198 | //\r |
1199 | if (ChannelNumber < 4) {\r |
1200 | BaseAddress = (UINT32) (*DeviceAddress);\r |
1201 | Count = (UINT16) (*NumberOfBytes - 1);\r |
1202 | } else {\r |
1203 | BaseAddress = (UINT32) (((UINT32) (*DeviceAddress) & 0xff0000) | (((UINT32) (*DeviceAddress) & 0xffff) >> 1));\r |
1204 | Count = (UINT16) ((*NumberOfBytes - 1) >> 1);\r |
1205 | }\r |
1206 | //\r |
1207 | // Program the DMA Write Single Mask Register for ChannelNumber\r |
1208 | // Clear the DMA Byte Pointer Register\r |
1209 | //\r |
1210 | if (ChannelNumber < 4) {\r |
1211 | DmaMask = R_8237_DMA_WRSMSK_CH0_3;\r |
1212 | DmaClear = R_8237_DMA_CBPR_CH0_3;\r |
1213 | DmaChannelMode = R_8237_DMA_CHMODE_CH0_3;\r |
1214 | } else {\r |
1215 | DmaMask = R_8237_DMA_WRSMSK_CH4_7;\r |
1216 | DmaClear = R_8237_DMA_CBPR_CH4_7;\r |
1217 | DmaChannelMode = R_8237_DMA_CHMODE_CH4_7;\r |
1218 | }\r |
1219 | \r |
1220 | Status = WritePort (\r |
1221 | This,\r |
1222 | DmaMask,\r |
1223 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
1224 | );\r |
1225 | if (EFI_ERROR (Status)) {\r |
1226 | return Status;\r |
1227 | }\r |
1228 | \r |
1229 | Status = WritePort (\r |
1230 | This,\r |
1231 | DmaClear,\r |
1232 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
1233 | );\r |
1234 | if (EFI_ERROR (Status)) {\r |
1235 | return Status;\r |
1236 | }\r |
1237 | \r |
1238 | Status = WritePort (This, DmaChannelMode, DmaMode);\r |
1239 | if (EFI_ERROR (Status)) {\r |
1240 | return Status;\r |
1241 | }\r |
1242 | \r |
1243 | Status = WriteDmaPort (\r |
1244 | This,\r |
6fcb2d91 |
1245 | mDmaRegisters[ChannelNumber].Address,\r |
1246 | mDmaRegisters[ChannelNumber].Page,\r |
1247 | mDmaRegisters[ChannelNumber].Count,\r |
c3902377 |
1248 | BaseAddress,\r |
1249 | Count\r |
1250 | );\r |
1251 | if (EFI_ERROR (Status)) {\r |
1252 | return Status;\r |
1253 | }\r |
1254 | \r |
1255 | Status = WritePort (\r |
1256 | This,\r |
1257 | DmaMask,\r |
1258 | (UINT8) (ChannelNumber & 0x03)\r |
1259 | );\r |
1260 | if (EFI_ERROR (Status)) {\r |
1261 | return Status;\r |
1262 | }\r |
1263 | \r |
1264 | return EFI_SUCCESS;\r |
1265 | }\r |
1266 | \r |
bcd70414 |
1267 | /**\r |
1268 | Maps a memory region for DMA\r |
1269 | \r |
6fcb2d91 |
1270 | @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
1271 | @param Operation Indicates the type of DMA (slave or bus master), and if \r |
1272 | the DMA operation is going to read or write to system memory. \r |
1273 | @param ChannelNumber The slave channel number to use for this DMA operation. \r |
1274 | If Operation and ChannelAttributes shows that this device \r |
1275 | performs bus mastering DMA, then this field is ignored. \r |
1276 | The legal range for this field is 0..7. \r |
1277 | @param ChannelAttributes The attributes of the DMA channel to use for this DMA operation\r |
1278 | @param HostAddress The system memory address to map to the device. \r |
1279 | @param NumberOfBytes On input the number of bytes to map. On output the number \r |
1280 | of bytes that were mapped.\r |
1281 | @param DeviceAddress The resulting map address for the bus master device to use \r |
1282 | to access the hosts HostAddress. \r |
1283 | @param Mapping A resulting value to pass to EFI_ISA_IO.Unmap().\r |
1284 | \r |
1285 | @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r |
1286 | @retval EFI_INVALID_PARAMETER The Operation or HostAddress is undefined.\r |
1287 | @retval EFI_UNSUPPORTED The HostAddress can not be mapped as a common buffer.\r |
1288 | @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r |
1289 | @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r |
bcd70414 |
1290 | **/\r |
c3902377 |
1291 | EFI_STATUS\r |
1292 | EFIAPI\r |
1293 | IsaIoMap (\r |
6fcb2d91 |
1294 | IN EFI_ISA_IO_PROTOCOL *This,\r |
1295 | IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,\r |
1296 | IN UINT8 ChannelNumber OPTIONAL,\r |
1297 | IN UINT32 ChannelAttributes,\r |
1298 | IN VOID *HostAddress,\r |
1299 | IN OUT UINTN *NumberOfBytes,\r |
1300 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
1301 | OUT VOID **Mapping\r |
c3902377 |
1302 | )\r |
c3902377 |
1303 | {\r |
1304 | //\r |
6fcb2d91 |
1305 | // Set Feature Flag PcdIsaBusSupportDma to FALSE to disable support for ISA DMA.\r |
c3902377 |
1306 | //\r |
1307 | if (!FeaturePcdGet (PcdIsaBusSupportDma)) {\r |
1308 | return EFI_UNSUPPORTED;\r |
1309 | }\r |
1310 | //\r |
1311 | // Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for \r |
1312 | // ISA Bus Master.\r |
1313 | //\r |
1314 | // So we just return EFI_UNSUPPORTED for these functions.\r |
1315 | //\r |
1316 | if (FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {\r |
6fcb2d91 |
1317 | return IsaIoMapOnlySupportSlaveReadWrite (\r |
1318 | This,\r |
1319 | Operation,\r |
1320 | ChannelNumber,\r |
1321 | ChannelAttributes,\r |
1322 | HostAddress,\r |
1323 | NumberOfBytes,\r |
1324 | DeviceAddress,\r |
1325 | Mapping\r |
c3902377 |
1326 | );\r |
1327 | \r |
1328 | } else {\r |
6fcb2d91 |
1329 | return IsaIoMapFullSupport (\r |
1330 | This,\r |
1331 | Operation,\r |
1332 | ChannelNumber,\r |
1333 | ChannelAttributes,\r |
1334 | HostAddress,\r |
1335 | NumberOfBytes,\r |
1336 | DeviceAddress,\r |
1337 | Mapping\r |
c3902377 |
1338 | );\r |
1339 | }\r |
1340 | }\r |
bcd70414 |
1341 | \r |
1342 | /**\r |
6fcb2d91 |
1343 | Allocates pages that are suitable for an EfiIsaIoOperationBusMasterCommonBuffer mapping.\r |
1344 | \r |
1345 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
1346 | @param[in] Type The type allocation to perform.\r |
1347 | @param[in] MemoryType The type of memory to allocate.\r |
1348 | @param[in] Pages The number of pages to allocate.\r |
1349 | @param[out] HostAddress A pointer to store the base address of the allocated range.\r |
1350 | @param[in] Attributes The requested bit mask of attributes for the allocated range.\r |
1351 | \r |
1352 | @retval EFI_SUCCESS The requested memory pages were allocated.\r |
1353 | @retval EFI_INVALID_PARAMETER Type is invalid or MemoryType is invalid or HostAddress is NULL\r |
1354 | @retval EFI_UNSUPPORTED Attributes is unsupported or the memory range specified \r |
1355 | by HostAddress, Pages, and Type is not available for common buffer use.\r |
1356 | @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r |
bcd70414 |
1357 | **/\r |
c3902377 |
1358 | EFI_STATUS\r |
1359 | EFIAPI\r |
1360 | IsaIoAllocateBuffer (\r |
6fcb2d91 |
1361 | IN EFI_ISA_IO_PROTOCOL *This,\r |
1362 | IN EFI_ALLOCATE_TYPE Type,\r |
1363 | IN EFI_MEMORY_TYPE MemoryType,\r |
1364 | IN UINTN Pages,\r |
1365 | OUT VOID **HostAddress,\r |
1366 | IN UINT64 Attributes\r |
c3902377 |
1367 | )\r |
c3902377 |
1368 | {\r |
1369 | EFI_STATUS Status;\r |
1370 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
1371 | \r |
1372 | //\r |
1373 | // Set Feature Flag PcdIsaBusOnlySupportSlaveDma to FALSE to disable support for \r |
1374 | // ISA Bus Master.\r |
1375 | // Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.\r |
1376 | //\r |
1377 | if (!FeaturePcdGet (PcdIsaBusSupportDma) || FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {\r |
1378 | return EFI_UNSUPPORTED;\r |
1379 | }\r |
1380 | \r |
1381 | if (HostAddress == NULL) {\r |
1382 | return EFI_INVALID_PARAMETER;\r |
1383 | }\r |
1384 | \r |
1385 | if (Type < AllocateAnyPages || Type >= MaxAllocateType) {\r |
1386 | return EFI_INVALID_PARAMETER;\r |
1387 | }\r |
1388 | //\r |
1389 | // The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData\r |
1390 | //\r |
1391 | if (MemoryType != EfiBootServicesData && MemoryType != EfiRuntimeServicesData) {\r |
1392 | return EFI_INVALID_PARAMETER;\r |
1393 | }\r |
1394 | \r |
6fcb2d91 |
1395 | if (Attributes & ~(EFI_ISA_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE | EFI_ISA_IO_ATTRIBUTE_MEMORY_CACHED)) {\r |
c3902377 |
1396 | return EFI_UNSUPPORTED;\r |
1397 | }\r |
1398 | \r |
1399 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) (ISA_MAX_MEMORY_ADDRESS - 1);\r |
1400 | if (Type == AllocateAddress) {\r |
1401 | if ((UINTN) (*HostAddress) >= ISA_MAX_MEMORY_ADDRESS) {\r |
1402 | return EFI_UNSUPPORTED;\r |
1403 | } else {\r |
1404 | PhysicalAddress = (UINTN) (*HostAddress);\r |
1405 | }\r |
1406 | }\r |
1407 | \r |
1408 | if (Type == AllocateAnyPages) {\r |
1409 | Type = AllocateMaxAddress;\r |
1410 | }\r |
1411 | \r |
1412 | Status = gBS->AllocatePages (Type, MemoryType, Pages, &PhysicalAddress);\r |
1413 | if (EFI_ERROR (Status)) {\r |
1414 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
1415 | return Status;\r |
1416 | }\r |
1417 | \r |
1418 | *HostAddress = (VOID *) (UINTN) PhysicalAddress;\r |
1419 | return Status;\r |
1420 | }\r |
1421 | \r |
bcd70414 |
1422 | /**\r |
6fcb2d91 |
1423 | Frees memory that was allocated with EFI_ISA_IO.AllocateBuffer(). \r |
c3902377 |
1424 | \r |
6fcb2d91 |
1425 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
1426 | @param[in] Pages The number of pages to free.\r |
1427 | @param[in] HostAddress The base address of the allocated range.\r |
c3902377 |
1428 | \r |
6fcb2d91 |
1429 | @retval EFI_SUCCESS The requested memory pages were freed.\r |
1430 | @retval EFI_INVALID_PARAMETER The memory was not allocated with EFI_ISA_IO.AllocateBufer().\r |
bcd70414 |
1431 | **/\r |
bcd70414 |
1432 | EFI_STATUS\r |
1433 | EFIAPI\r |
1434 | IsaIoFreeBuffer (\r |
6fcb2d91 |
1435 | IN EFI_ISA_IO_PROTOCOL *This,\r |
1436 | IN UINTN Pages,\r |
1437 | IN VOID *HostAddress\r |
bcd70414 |
1438 | )\r |
c3902377 |
1439 | {\r |
6fcb2d91 |
1440 | EFI_STATUS Status;\r |
c3902377 |
1441 | \r |
1442 | //\r |
1443 | // Set Feature Flag PcdIsaBusOnlySupportSlaveDma to FALSE to disable support for \r |
1444 | // ISA Bus Master.\r |
1445 | // Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.\r |
1446 | //\r |
1447 | if (!FeaturePcdGet (PcdIsaBusSupportDma) || FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {\r |
1448 | return EFI_UNSUPPORTED;\r |
1449 | }\r |
1450 | \r |
c3902377 |
1451 | Status = gBS->FreePages (\r |
6fcb2d91 |
1452 | (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress,\r |
c3902377 |
1453 | Pages\r |
1454 | );\r |
1455 | if (EFI_ERROR (Status)) {\r |
1456 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
1457 | }\r |
1458 | \r |
1459 | return Status;\r |
1460 | }\r |
1461 | \r |