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806bf4f2 | 1 | /** @file\r |
2 | Uses the services of the I/O Library to produce the CPU I/O Protocol\r | |
3 | \r | |
4 | Copyright (c) 2004 - 2010, Intel Corporation \r | |
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 | |
9 | \r | |
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 | |
12 | \r | |
13 | **/\r | |
14 | \r | |
15 | #include <PiDxe.h>\r | |
16 | \r | |
17 | #include <Protocol/CpuIo.h>\r | |
18 | \r | |
19 | #include <Library/BaseLib.h>\r | |
20 | #include <Library/DebugLib.h>\r | |
21 | #include <Library/IoLib.h>\r | |
22 | #include <Library/UefiBootServicesTableLib.h>\r | |
23 | \r | |
24 | #define MAX_IO_PORT_ADDRESS 0xFFFF\r | |
25 | \r | |
26 | //\r | |
27 | // Function Prototypes\r | |
28 | //\r | |
29 | EFI_STATUS\r | |
30 | EFIAPI\r | |
31 | CpuMemoryServiceRead (\r | |
32 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
33 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
34 | IN UINT64 Address,\r | |
35 | IN UINTN Count,\r | |
36 | OUT VOID *Buffer\r | |
37 | );\r | |
38 | \r | |
39 | EFI_STATUS\r | |
40 | EFIAPI\r | |
41 | CpuMemoryServiceWrite (\r | |
42 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
43 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
44 | IN UINT64 Address,\r | |
45 | IN UINTN Count,\r | |
46 | IN VOID *Buffer\r | |
47 | );\r | |
48 | \r | |
49 | EFI_STATUS\r | |
50 | EFIAPI\r | |
51 | CpuIoServiceRead (\r | |
52 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
53 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
54 | IN UINT64 Address,\r | |
55 | IN UINTN Count,\r | |
56 | OUT VOID *Buffer\r | |
57 | );\r | |
58 | \r | |
59 | EFI_STATUS\r | |
60 | EFIAPI\r | |
61 | CpuIoServiceWrite (\r | |
62 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
63 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
64 | IN UINT64 Address,\r | |
65 | IN UINTN Count,\r | |
66 | IN VOID *Buffer\r | |
67 | );\r | |
68 | \r | |
69 | //\r | |
70 | // Handle for the CPU I/O Protocol\r | |
71 | //\r | |
72 | EFI_HANDLE mHandle = NULL;\r | |
73 | \r | |
74 | //\r | |
75 | // CPU I/O Protocol inatance\r | |
76 | //\r | |
77 | EFI_CPU_IO_PROTOCOL mCpuIo = {\r | |
78 | {\r | |
79 | CpuMemoryServiceRead,\r | |
80 | CpuMemoryServiceWrite\r | |
81 | },\r | |
82 | {\r | |
83 | CpuIoServiceRead,\r | |
84 | CpuIoServiceWrite\r | |
85 | }\r | |
86 | };\r | |
87 | \r | |
88 | //\r | |
89 | // Lookup table for increment values based on transfer widths\r | |
90 | //\r | |
91 | UINT8 mInStride[] = {\r | |
92 | 1, // EfiCpuIoWidthUint8\r | |
93 | 2, // EfiCpuIoWidthUint16\r | |
94 | 4, // EfiCpuIoWidthUint32\r | |
95 | 8, // EfiCpuIoWidthUint64\r | |
96 | 0, // EfiCpuIoWidthFifoUint8\r | |
97 | 0, // EfiCpuIoWidthFifoUint16\r | |
98 | 0, // EfiCpuIoWidthFifoUint32\r | |
99 | 0, // EfiCpuIoWidthFifoUint64\r | |
100 | 1, // EfiCpuIoWidthFillUint8\r | |
101 | 2, // EfiCpuIoWidthFillUint16\r | |
102 | 4, // EfiCpuIoWidthFillUint32\r | |
103 | 8 // EfiCpuIoWidthFillUint64\r | |
104 | };\r | |
105 | \r | |
106 | //\r | |
107 | // Lookup table for increment values based on transfer widths\r | |
108 | //\r | |
109 | UINT8 mOutStride[] = {\r | |
110 | 1, // EfiCpuIoWidthUint8\r | |
111 | 2, // EfiCpuIoWidthUint16\r | |
112 | 4, // EfiCpuIoWidthUint32\r | |
113 | 8, // EfiCpuIoWidthUint64\r | |
114 | 1, // EfiCpuIoWidthFifoUint8\r | |
115 | 2, // EfiCpuIoWidthFifoUint16\r | |
116 | 4, // EfiCpuIoWidthFifoUint32\r | |
117 | 8, // EfiCpuIoWidthFifoUint64\r | |
118 | 0, // EfiCpuIoWidthFillUint8\r | |
119 | 0, // EfiCpuIoWidthFillUint16\r | |
120 | 0, // EfiCpuIoWidthFillUint32\r | |
121 | 0 // EfiCpuIoWidthFillUint64\r | |
122 | };\r | |
123 | \r | |
124 | /**\r | |
125 | Check parameters to a CPU I/O Protocol service request.\r | |
126 | \r | |
127 | @param Width Signifies the width of the I/O or Memory operation.\r | |
128 | @param Address The base address of the I/O or Memory operation.\r | |
129 | @param Count The number of I/O or Memory operations to perform.\r | |
130 | The number of bytes moved is Width size * Count, starting at Address.\r | |
131 | @param Buffer For read operations, the destination buffer to store the results.\r | |
132 | For write operations, the source buffer from which to write data.\r | |
133 | @param MmioOperation TRUE for an MMIO operation, FALSE for I/O Port operation.\r | |
134 | \r | |
135 | @retval EFI_SUCCESS The parameters for this request pass the checks.\r | |
136 | @retval EFI_INVALID_PARAMETER Buffer is NULL or Width is not valid.\r | |
137 | @retval EFI_UNSUPPORTED The address range specified by Address, Width, and Count exceeds Limit.\r | |
138 | The Buffer is not aligned for the given Width.\r | |
139 | \r | |
140 | **/\r | |
141 | EFI_STATUS\r | |
142 | CpuIoCheckParameter (\r | |
143 | IN BOOLEAN MmioOperation,\r | |
144 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
145 | IN UINT64 Address,\r | |
146 | IN UINTN Count,\r | |
147 | IN VOID *Buffer\r | |
148 | )\r | |
149 | {\r | |
150 | UINT64 MaxCount;\r | |
151 | UINT64 Limit;\r | |
152 | \r | |
153 | //\r | |
154 | // Check to see if Buffer is NULL\r | |
155 | //\r | |
156 | if (Buffer == NULL) {\r | |
157 | return EFI_INVALID_PARAMETER;\r | |
158 | }\r | |
159 | \r | |
160 | //\r | |
161 | // Check to see if Width is in the valid range\r | |
162 | //\r | |
163 | if (Width < 0 || Width >= EfiCpuIoWidthMaximum) {\r | |
164 | return EFI_INVALID_PARAMETER;\r | |
165 | }\r | |
166 | \r | |
167 | //\r | |
168 | // For FIFO type, the target address won't increase during the access,\r | |
169 | // so treat Count as 1\r | |
170 | //\r | |
171 | if (Width >= EfiCpuIoWidthFifoUint8 && Width <= EfiCpuIoWidthFifoUint64) {\r | |
172 | Count = 1;\r | |
173 | }\r | |
174 | \r | |
175 | //\r | |
176 | // Check to see if Width is in the valid range for I/O Port operations\r | |
177 | //\r | |
178 | Width = Width & 0x03;\r | |
179 | if (!MmioOperation && (Width == EfiCpuIoWidthUint64)) {\r | |
180 | return EFI_INVALID_PARAMETER;\r | |
181 | }\r | |
182 | \r | |
183 | //\r | |
184 | // Check to see if any address associated with this transfer exceeds the maximum \r | |
185 | // allowed address. The maximum address implied by the parameters passed in is\r | |
186 | // Address + Size * Count. If the following condition is met, then the transfer\r | |
187 | // is not supported.\r | |
188 | //\r | |
189 | // Address + Size * Count > (MmioOperation ? MAX_ADDRESS : MAX_IO_PORT_ADDRESS) + 1\r | |
190 | //\r | |
191 | // Since MAX_ADDRESS can be the maximum integer value supported by the CPU and Count \r | |
192 | // can also be the maximum integer value supported by the CPU, this range\r | |
193 | // check must be adjusted to avoid all oveflow conditions.\r | |
194 | // \r | |
195 | // The follwing form of the range check is equivalent but assumes that \r | |
196 | // MAX_ADDRESS and MAX_IO_PORT_ADDRESS are of the form (2^n - 1).\r | |
197 | //\r | |
198 | Limit = (MmioOperation ? MAX_ADDRESS : MAX_IO_PORT_ADDRESS);\r | |
199 | if (Count == 0) {\r | |
200 | if (Address > Limit) {\r | |
201 | return EFI_UNSUPPORTED;\r | |
202 | }\r | |
203 | } else { \r | |
204 | MaxCount = RShiftU64 (Limit, Width);\r | |
205 | if (MaxCount < (Count - 1)) {\r | |
206 | return EFI_UNSUPPORTED;\r | |
207 | }\r | |
208 | if (Address > LShiftU64 (MaxCount - Count + 1, Width)) {\r | |
209 | return EFI_UNSUPPORTED;\r | |
210 | }\r | |
211 | }\r | |
212 | \r | |
213 | //\r | |
214 | // Check to see if Buffer is alligned\r | |
215 | //\r | |
216 | if (((UINTN)Buffer & (mInStride[Width] - 1)) != 0) {\r | |
217 | return EFI_UNSUPPORTED;\r | |
218 | }\r | |
219 | \r | |
220 | return EFI_SUCCESS;\r | |
221 | }\r | |
222 | \r | |
223 | /**\r | |
224 | Reads memory-mapped registers.\r | |
225 | \r | |
226 | @param This A pointer to the EFI_CPU_IO_PROTOCOL instance.\r | |
227 | @param Width Signifies the width of the I/O or Memory operation.\r | |
228 | @param Address The base address of the I/O or Memoryoperation.\r | |
229 | @param Count The number of I/O or Memory operations to perform.\r | |
230 | The number of bytes moved is Width size * Count, starting at Address.\r | |
231 | @param Buffer For read operations, the destination buffer to store the results.\r | |
232 | For write operations, the source buffer from which to write data.\r | |
233 | \r | |
234 | @retval EFI_SUCCESS The data was read from or written to the EFI system.\r | |
235 | @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.\r | |
236 | @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.\r | |
237 | Or,The address range specified by Address, Width, and Count is not valid for this EFI system.\r | |
238 | \r | |
239 | **/\r | |
240 | EFI_STATUS\r | |
241 | EFIAPI\r | |
242 | CpuMemoryServiceRead (\r | |
243 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
244 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
245 | IN UINT64 Address,\r | |
246 | IN UINTN Count,\r | |
247 | OUT VOID *Buffer\r | |
248 | )\r | |
249 | {\r | |
250 | EFI_STATUS Status;\r | |
251 | UINT8 InStride;\r | |
252 | UINT8 OutStride;\r | |
253 | EFI_CPU_IO_PROTOCOL_WIDTH OperationWidth;\r | |
254 | UINT8 *Uint8Buffer;\r | |
255 | \r | |
256 | Status = CpuIoCheckParameter (TRUE, Width, Address, Count, Buffer);\r | |
257 | if (EFI_ERROR (Status)) {\r | |
258 | return Status;\r | |
259 | }\r | |
260 | \r | |
261 | //\r | |
262 | // Select loop based on the width of the transfer\r | |
263 | //\r | |
264 | InStride = mInStride[Width];\r | |
265 | OutStride = mOutStride[Width];\r | |
266 | OperationWidth = Width & 0x03;\r | |
267 | for (Uint8Buffer = Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {\r | |
268 | if (OperationWidth == EfiCpuIoWidthUint8) {\r | |
269 | *Uint8Buffer = MmioRead8 ((UINTN)Address);\r | |
270 | } else if (OperationWidth == EfiCpuIoWidthUint16) {\r | |
271 | *((UINT16 *)Uint8Buffer) = MmioRead16 ((UINTN)Address);\r | |
272 | } else if (OperationWidth == EfiCpuIoWidthUint32) {\r | |
273 | *((UINT32 *)Uint8Buffer) = MmioRead32 ((UINTN)Address);\r | |
274 | } else if (OperationWidth == EfiCpuIoWidthUint64) {\r | |
275 | *((UINT64 *)Uint8Buffer) = MmioRead64 ((UINTN)Address);\r | |
276 | }\r | |
277 | }\r | |
278 | return EFI_SUCCESS;\r | |
279 | }\r | |
280 | \r | |
281 | /**\r | |
282 | Writes memory-mapped registers.\r | |
283 | \r | |
284 | @param This A pointer to the EFI_CPU_IO_PROTOCOL instance.\r | |
285 | @param Width Signifies the width of the I/O or Memory operation.\r | |
286 | @param Address The base address of the I/O or Memoryoperation.\r | |
287 | @param Count The number of I/O or Memory operations to perform.\r | |
288 | The number of bytes moved is Width size * Count, starting at Address.\r | |
289 | @param Buffer For read operations, the destination buffer to store the results.\r | |
290 | For write operations, the source buffer from which to write data.\r | |
291 | \r | |
292 | @retval EFI_SUCCESS The data was read from or written to the EFI system.\r | |
293 | @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.\r | |
294 | @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.\r | |
295 | Or,The address range specified by Address, Width, and Count is not valid for this EFI system.\r | |
296 | \r | |
297 | **/\r | |
298 | EFI_STATUS\r | |
299 | EFIAPI\r | |
300 | CpuMemoryServiceWrite (\r | |
301 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
302 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
303 | IN UINT64 Address,\r | |
304 | IN UINTN Count,\r | |
305 | IN VOID *Buffer\r | |
306 | )\r | |
307 | {\r | |
308 | EFI_STATUS Status;\r | |
309 | UINT8 InStride;\r | |
310 | UINT8 OutStride;\r | |
311 | EFI_CPU_IO_PROTOCOL_WIDTH OperationWidth;\r | |
312 | UINT8 *Uint8Buffer;\r | |
313 | \r | |
314 | Status = CpuIoCheckParameter (TRUE, Width, Address, Count, Buffer);\r | |
315 | if (EFI_ERROR (Status)) {\r | |
316 | return Status;\r | |
317 | }\r | |
318 | \r | |
319 | //\r | |
320 | // Select loop based on the width of the transfer\r | |
321 | //\r | |
322 | InStride = mInStride[Width];\r | |
323 | OutStride = mOutStride[Width];\r | |
324 | OperationWidth = Width & 0x03;\r | |
325 | for (Uint8Buffer = Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {\r | |
326 | if (OperationWidth == EfiCpuIoWidthUint8) {\r | |
327 | MmioWrite8 ((UINTN)Address, *Uint8Buffer);\r | |
328 | } else if (OperationWidth == EfiCpuIoWidthUint16) {\r | |
329 | MmioWrite16 ((UINTN)Address, *((UINT16 *)Uint8Buffer));\r | |
330 | } else if (OperationWidth == EfiCpuIoWidthUint32) {\r | |
331 | MmioWrite32 ((UINTN)Address, *((UINT32 *)Uint8Buffer));\r | |
332 | } else if (OperationWidth == EfiCpuIoWidthUint64) {\r | |
333 | MmioWrite64 ((UINTN)Address, *((UINT64 *)Uint8Buffer));\r | |
334 | }\r | |
335 | }\r | |
336 | return EFI_SUCCESS;\r | |
337 | }\r | |
338 | \r | |
339 | /**\r | |
340 | Reads I/O registers.\r | |
341 | \r | |
342 | @param This A pointer to the EFI_CPU_IO_PROTOCOL instance.\r | |
343 | @param Width Signifies the width of the I/O or Memory operation.\r | |
344 | @param Address The base address of the I/O or Memoryoperation.\r | |
345 | @param Count The number of I/O or Memory operations to perform.\r | |
346 | The number of bytes moved is Width size * Count, starting at Address.\r | |
347 | @param Buffer For read operations, the destination buffer to store the results.\r | |
348 | For write operations, the source buffer from which to write data.\r | |
349 | \r | |
350 | @retval EFI_SUCCESS The data was read from or written to the EFI system.\r | |
351 | @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.\r | |
352 | @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.\r | |
353 | Or,The address range specified by Address, Width, and Count is not valid for this EFI system.\r | |
354 | \r | |
355 | **/\r | |
356 | EFI_STATUS\r | |
357 | EFIAPI\r | |
358 | CpuIoServiceRead (\r | |
359 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
360 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
361 | IN UINT64 Address,\r | |
362 | IN UINTN Count,\r | |
363 | OUT VOID *Buffer\r | |
364 | )\r | |
365 | {\r | |
366 | EFI_STATUS Status;\r | |
367 | UINT8 InStride;\r | |
368 | UINT8 OutStride;\r | |
369 | EFI_CPU_IO_PROTOCOL_WIDTH OperationWidth;\r | |
370 | UINT8 *Uint8Buffer;\r | |
371 | \r | |
372 | Status = CpuIoCheckParameter (FALSE, Width, Address, Count, Buffer);\r | |
373 | if (EFI_ERROR (Status)) {\r | |
374 | return Status;\r | |
375 | }\r | |
376 | \r | |
377 | //\r | |
378 | // Select loop based on the width of the transfer\r | |
379 | //\r | |
380 | InStride = mInStride[Width];\r | |
381 | OutStride = mOutStride[Width];\r | |
382 | OperationWidth = Width & 0x03;\r | |
383 | for (Uint8Buffer = Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {\r | |
384 | if (OperationWidth == EfiCpuIoWidthUint8) {\r | |
385 | *Uint8Buffer = IoRead8 ((UINTN)Address);\r | |
386 | } else if (OperationWidth == EfiCpuIoWidthUint16) {\r | |
387 | *((UINT16 *)Uint8Buffer) = IoRead16 ((UINTN)Address);\r | |
388 | } else if (OperationWidth == EfiCpuIoWidthUint32) {\r | |
389 | *((UINT32 *)Uint8Buffer) = IoRead32 ((UINTN)Address);\r | |
390 | }\r | |
391 | }\r | |
392 | \r | |
393 | return EFI_SUCCESS;\r | |
394 | }\r | |
395 | \r | |
396 | /**\r | |
397 | Write I/O registers.\r | |
398 | \r | |
399 | @param This A pointer to the EFI_CPU_IO_PROTOCOL instance.\r | |
400 | @param Width Signifies the width of the I/O or Memory operation.\r | |
401 | @param Address The base address of the I/O or Memoryoperation.\r | |
402 | @param Count The number of I/O or Memory operations to perform.\r | |
403 | The number of bytes moved is Width size * Count, starting at Address.\r | |
404 | @param Buffer For read operations, the destination buffer to store the results.\r | |
405 | For write operations, the source buffer from which to write data.\r | |
406 | \r | |
407 | @retval EFI_SUCCESS The data was read from or written to the EFI system.\r | |
408 | @retval EFI_INVALID_PARAMETER Width is invalid for this EFI system.Or Buffer is NULL.\r | |
409 | @retval EFI_UNSUPPORTED The Buffer is not aligned for the given Width.\r | |
410 | Or,The address range specified by Address, Width, and Count is not valid for this EFI system.\r | |
411 | \r | |
412 | **/\r | |
413 | EFI_STATUS\r | |
414 | EFIAPI\r | |
415 | CpuIoServiceWrite (\r | |
416 | IN EFI_CPU_IO_PROTOCOL *This,\r | |
417 | IN EFI_CPU_IO_PROTOCOL_WIDTH Width,\r | |
418 | IN UINT64 Address,\r | |
419 | IN UINTN Count,\r | |
420 | IN VOID *Buffer\r | |
421 | )\r | |
422 | {\r | |
423 | EFI_STATUS Status;\r | |
424 | UINT8 InStride;\r | |
425 | UINT8 OutStride;\r | |
426 | EFI_CPU_IO_PROTOCOL_WIDTH OperationWidth;\r | |
427 | UINT8 *Uint8Buffer;\r | |
428 | \r | |
429 | //\r | |
430 | // Make sure the parameters are valid\r | |
431 | //\r | |
432 | Status = CpuIoCheckParameter (FALSE, Width, Address, Count, Buffer);\r | |
433 | if (EFI_ERROR (Status)) {\r | |
434 | return Status;\r | |
435 | }\r | |
436 | \r | |
437 | //\r | |
438 | // Select loop based on the width of the transfer\r | |
439 | //\r | |
440 | InStride = mInStride[Width];\r | |
441 | OutStride = mOutStride[Width];\r | |
442 | OperationWidth = Width & 0x03;\r | |
443 | for (Uint8Buffer = (UINT8 *)Buffer; Count > 0; Address += InStride, Uint8Buffer += OutStride, Count--) {\r | |
444 | if (OperationWidth == EfiCpuIoWidthUint8) {\r | |
445 | IoWrite8 ((UINTN)Address, *Uint8Buffer);\r | |
446 | } else if (OperationWidth == EfiCpuIoWidthUint16) {\r | |
447 | IoWrite16 ((UINTN)Address, *((UINT16 *)Uint8Buffer));\r | |
448 | } else if (OperationWidth == EfiCpuIoWidthUint32) {\r | |
449 | IoWrite32 ((UINTN)Address, *((UINT32 *)Uint8Buffer));\r | |
450 | }\r | |
451 | }\r | |
452 | \r | |
453 | return EFI_SUCCESS;\r | |
454 | }\r | |
455 | \r | |
456 | /**\r | |
457 | The user Entry Point for module CpuIo. The user code starts with this function.\r | |
458 | \r | |
459 | @param[in] ImageHandle The firmware allocated handle for the EFI image. \r | |
460 | @param[in] SystemTable A pointer to the EFI System Table.\r | |
461 | \r | |
462 | @retval EFI_SUCCESS The entry point is executed successfully.\r | |
463 | @retval other Some error occurs when executing this entry point.\r | |
464 | \r | |
465 | **/\r | |
466 | EFI_STATUS\r | |
467 | EFIAPI\r | |
468 | CpuIoInitialize (\r | |
469 | IN EFI_HANDLE ImageHandle,\r | |
470 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
471 | )\r | |
472 | {\r | |
473 | EFI_STATUS Status;\r | |
474 | \r | |
475 | ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiCpuIoProtocolGuid);\r | |
476 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
477 | &mHandle,\r | |
478 | &gEfiCpuIoProtocolGuid, &mCpuIo,\r | |
479 | NULL\r | |
480 | );\r | |
481 | ASSERT_EFI_ERROR (Status);\r | |
482 | \r | |
483 | return Status;\r | |
484 | }\r |