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878ddf1f | 1 | /** @file\r |
2 | I/O Library. This file has compiler specifics for Microsft C as there is no\r | |
3 | ANSI C standard for doing IO.\r | |
4 | \r | |
5 | MSC - uses intrinsic functions and the optimize will remove the function call\r | |
6 | overhead.\r | |
7 | \r | |
8 | We don't advocate putting compiler specifics in libraries or drivers but there\r | |
9 | is no other way to make this work.\r | |
10 | \r | |
11 | Copyright (c) 2006, Intel Corporation<BR>\r | |
12 | All rights reserved. This program and the accompanying materials\r | |
13 | are licensed and made available under the terms and conditions of the BSD License\r | |
14 | which accompanies this distribution. The full text of the license may be found at\r | |
15 | http://opensource.org/licenses/bsd-license.php\r | |
16 | \r | |
17 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
18 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
19 | \r | |
20 | Module Name: IoLibMsc.c\r | |
21 | \r | |
22 | **/\r | |
23 | \r | |
24 | \r | |
25 | #if _MSC_EXTENSIONS\r | |
26 | \r | |
27 | //\r | |
28 | // Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics\r | |
29 | //\r | |
2ce31132 | 30 | int _inp (unsigned short port);\r |
878ddf1f | 31 | unsigned short _inpw (unsigned short port);\r |
32 | unsigned long _inpd (unsigned short port);\r | |
33 | int _outp (unsigned short port, int databyte );\r | |
2ce31132 | 34 | unsigned short _outpw (unsigned short port, unsigned short dataword );\r |
35 | unsigned long _outpd (unsigned short port, unsigned long dataword );\r | |
36 | void _ReadWriteBarrier (void);\r | |
878ddf1f | 37 | \r |
38 | #pragma intrinsic(_inp)\r | |
39 | #pragma intrinsic(_inpw)\r | |
40 | #pragma intrinsic(_inpd)\r | |
41 | #pragma intrinsic(_outp)\r | |
42 | #pragma intrinsic(_outpw)\r | |
43 | #pragma intrinsic(_outpd)\r | |
2ce31132 | 44 | #pragma intrinsic(_ReadWriteBarrier)\r |
878ddf1f | 45 | \r |
2ce31132 | 46 | //\r |
47 | // _ReadWriteBarrier() forces memory reads and writes to complete at the point\r | |
48 | // in the call. This is only a hint to the compiler and does emit code.\r | |
cea9bda0 | 49 | // In past versions of the compiler, _ReadWriteBarrier was enforced only\r |
50 | // locally and did not affect functions up the call tree. In Visual C++\r | |
2ce31132 | 51 | // 2005, _ReadWriteBarrier is enforced all the way up the call tree.\r |
52 | //\r | |
878ddf1f | 53 | \r |
54 | /**\r | |
55 | Reads an 8-bit I/O port.\r | |
56 | \r | |
57 | Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.\r | |
58 | This function must guarantee that all I/O read and write operations are\r | |
59 | serialized.\r | |
60 | \r | |
61 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
62 | \r | |
63 | @param Port The I/O port to read.\r | |
64 | \r | |
65 | @return The value read.\r | |
66 | \r | |
67 | **/\r | |
68 | UINT8\r | |
69 | EFIAPI\r | |
70 | IoRead8 (\r | |
71 | IN UINTN Port\r | |
72 | )\r | |
73 | {\r | |
cea9bda0 | 74 | UINT8 Value;\r |
75 | \r | |
76 | _ReadWriteBarrier ();\r | |
77 | Value = (UINT8)_inp ((UINT16)Port);\r | |
2ce31132 | 78 | _ReadWriteBarrier ();\r |
cea9bda0 | 79 | return Value;\r |
878ddf1f | 80 | }\r |
81 | \r | |
82 | /**\r | |
83 | Writes an 8-bit I/O port.\r | |
84 | \r | |
85 | Writes the 8-bit I/O port specified by Port with the value specified by Value\r | |
86 | and returns Value. This function must guarantee that all I/O read and write\r | |
87 | operations are serialized.\r | |
88 | \r | |
89 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
90 | \r | |
91 | @param Port The I/O port to write.\r | |
92 | @param Value The value to write to the I/O port.\r | |
93 | \r | |
94 | @return The value written the I/O port.\r | |
95 | \r | |
96 | **/\r | |
97 | UINT8\r | |
98 | EFIAPI\r | |
99 | IoWrite8 (\r | |
100 | IN UINTN Port,\r | |
101 | IN UINT8 Value\r | |
102 | )\r | |
103 | {\r | |
2ce31132 | 104 | _ReadWriteBarrier ();\r |
cea9bda0 | 105 | (UINT8)_outp ((UINT16)Port, Value);\r |
106 | _ReadWriteBarrier ();\r | |
107 | return Value;\r | |
878ddf1f | 108 | }\r |
109 | \r | |
110 | /**\r | |
111 | Reads a 16-bit I/O port.\r | |
112 | \r | |
113 | Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.\r | |
114 | This function must guarantee that all I/O read and write operations are\r | |
115 | serialized.\r | |
116 | \r | |
117 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
118 | \r | |
119 | @param Port The I/O port to read.\r | |
120 | \r | |
121 | @return The value read.\r | |
122 | \r | |
123 | **/\r | |
124 | UINT16\r | |
125 | EFIAPI\r | |
126 | IoRead16 (\r | |
127 | IN UINTN Port\r | |
128 | )\r | |
129 | {\r | |
cea9bda0 | 130 | UINT16 Value;\r |
131 | \r | |
878ddf1f | 132 | ASSERT ((Port & 1) == 0);\r |
2ce31132 | 133 | _ReadWriteBarrier ();\r |
cea9bda0 | 134 | Value = _inpw ((UINT16)Port);\r |
135 | _ReadWriteBarrier ();\r | |
136 | return Value;\r | |
878ddf1f | 137 | }\r |
138 | \r | |
139 | /**\r | |
140 | Writes a 16-bit I/O port.\r | |
141 | \r | |
142 | Writes the 16-bit I/O port specified by Port with the value specified by Value\r | |
143 | and returns Value. This function must guarantee that all I/O read and write\r | |
144 | operations are serialized.\r | |
145 | \r | |
146 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
147 | \r | |
148 | @param Port The I/O port to write.\r | |
149 | @param Value The value to write to the I/O port.\r | |
150 | \r | |
151 | @return The value written the I/O port.\r | |
152 | \r | |
153 | **/\r | |
154 | UINT16\r | |
155 | EFIAPI\r | |
156 | IoWrite16 (\r | |
157 | IN UINTN Port,\r | |
158 | IN UINT16 Value\r | |
159 | )\r | |
160 | {\r | |
161 | ASSERT ((Port & 1) == 0);\r | |
2ce31132 | 162 | _ReadWriteBarrier ();\r |
cea9bda0 | 163 | _outpw ((UINT16)Port, Value);\r |
164 | _ReadWriteBarrier ();\r | |
165 | return Value;\r | |
878ddf1f | 166 | }\r |
167 | \r | |
168 | /**\r | |
169 | Reads a 32-bit I/O port.\r | |
170 | \r | |
171 | Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.\r | |
172 | This function must guarantee that all I/O read and write operations are\r | |
173 | serialized.\r | |
174 | \r | |
175 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
176 | \r | |
177 | @param Port The I/O port to read.\r | |
178 | \r | |
179 | @return The value read.\r | |
180 | \r | |
181 | **/\r | |
182 | UINT32\r | |
183 | EFIAPI\r | |
184 | IoRead32 (\r | |
185 | IN UINTN Port\r | |
186 | )\r | |
187 | {\r | |
cea9bda0 | 188 | UINT32 Value;\r |
189 | \r | |
878ddf1f | 190 | ASSERT ((Port & 3) == 0);\r |
2ce31132 | 191 | _ReadWriteBarrier ();\r |
cea9bda0 | 192 | Value = _inpd ((UINT16)Port);\r |
193 | _ReadWriteBarrier ();\r | |
194 | return Value;\r | |
878ddf1f | 195 | }\r |
196 | \r | |
197 | /**\r | |
198 | Writes a 32-bit I/O port.\r | |
199 | \r | |
200 | Writes the 32-bit I/O port specified by Port with the value specified by Value\r | |
201 | and returns Value. This function must guarantee that all I/O read and write\r | |
202 | operations are serialized.\r | |
203 | \r | |
204 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
205 | \r | |
206 | @param Port The I/O port to write.\r | |
207 | @param Value The value to write to the I/O port.\r | |
208 | \r | |
209 | @return The value written the I/O port.\r | |
210 | \r | |
211 | **/\r | |
212 | UINT32\r | |
213 | EFIAPI\r | |
214 | IoWrite32 (\r | |
215 | IN UINTN Port,\r | |
216 | IN UINT32 Value\r | |
217 | )\r | |
218 | {\r | |
219 | ASSERT ((Port & 3) == 0);\r | |
2ce31132 | 220 | _ReadWriteBarrier ();\r |
cea9bda0 | 221 | _outpd ((UINT16)Port, Value);\r |
222 | _ReadWriteBarrier ();\r | |
223 | return Value;\r | |
878ddf1f | 224 | }\r |
225 | \r | |
2ce31132 | 226 | \r |
227 | /**\r | |
228 | Reads an 8-bit MMIO register.\r | |
229 | \r | |
230 | Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r | |
231 | returned. This function must guarantee that all MMIO read and write\r | |
232 | operations are serialized.\r | |
233 | \r | |
234 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
235 | \r | |
236 | @param Address The MMIO register to read.\r | |
237 | \r | |
238 | @return The value read.\r | |
239 | \r | |
240 | **/\r | |
241 | UINT8\r | |
242 | EFIAPI\r | |
243 | MmioRead8 (\r | |
244 | IN UINTN Address\r | |
245 | )\r | |
246 | {\r | |
cea9bda0 | 247 | UINT8 Value;\r |
248 | \r | |
249 | Value = *(volatile UINT8*)Address;\r | |
250 | return Value;\r | |
2ce31132 | 251 | }\r |
252 | \r | |
253 | /**\r | |
254 | Writes an 8-bit MMIO register.\r | |
255 | \r | |
256 | Writes the 8-bit MMIO register specified by Address with the value specified\r | |
257 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
258 | and write operations are serialized.\r | |
259 | \r | |
260 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
261 | \r | |
262 | @param Address The MMIO register to write.\r | |
263 | @param Value The value to write to the MMIO register.\r | |
264 | \r | |
265 | **/\r | |
266 | UINT8\r | |
267 | EFIAPI\r | |
268 | MmioWrite8 (\r | |
269 | IN UINTN Address,\r | |
270 | IN UINT8 Value\r | |
271 | )\r | |
272 | {\r | |
cea9bda0 | 273 | return *(volatile UINT8*)Address = Value;\r |
2ce31132 | 274 | }\r |
275 | \r | |
276 | /**\r | |
277 | Reads a 16-bit MMIO register.\r | |
278 | \r | |
279 | Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r | |
280 | returned. This function must guarantee that all MMIO read and write\r | |
281 | operations are serialized.\r | |
282 | \r | |
283 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
284 | \r | |
285 | @param Address The MMIO register to read.\r | |
286 | \r | |
287 | @return The value read.\r | |
288 | \r | |
289 | **/\r | |
290 | UINT16\r | |
291 | EFIAPI\r | |
292 | MmioRead16 (\r | |
293 | IN UINTN Address\r | |
294 | )\r | |
295 | {\r | |
cea9bda0 | 296 | UINT16 Value;\r |
297 | \r | |
2ce31132 | 298 | ASSERT ((Address & 1) == 0);\r |
cea9bda0 | 299 | Value = *(volatile UINT16*)Address;\r |
300 | return Value;\r | |
2ce31132 | 301 | }\r |
302 | \r | |
303 | /**\r | |
304 | Writes a 16-bit MMIO register.\r | |
305 | \r | |
306 | Writes the 16-bit MMIO register specified by Address with the value specified\r | |
307 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
308 | and write operations are serialized.\r | |
309 | \r | |
310 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
311 | \r | |
312 | @param Address The MMIO register to write.\r | |
313 | @param Value The value to write to the MMIO register.\r | |
314 | \r | |
315 | **/\r | |
316 | UINT16\r | |
317 | EFIAPI\r | |
318 | MmioWrite16 (\r | |
319 | IN UINTN Address,\r | |
320 | IN UINT16 Value\r | |
321 | )\r | |
322 | {\r | |
323 | ASSERT ((Address & 1) == 0);\r | |
cea9bda0 | 324 | return *(volatile UINT16*)Address = Value;\r |
2ce31132 | 325 | }\r |
326 | \r | |
327 | /**\r | |
328 | Reads a 32-bit MMIO register.\r | |
329 | \r | |
330 | Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r | |
331 | returned. This function must guarantee that all MMIO read and write\r | |
332 | operations are serialized.\r | |
333 | \r | |
334 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
335 | \r | |
336 | @param Address The MMIO register to read.\r | |
337 | \r | |
338 | @return The value read.\r | |
339 | \r | |
340 | **/\r | |
341 | UINT32\r | |
342 | EFIAPI\r | |
343 | MmioRead32 (\r | |
344 | IN UINTN Address\r | |
345 | )\r | |
346 | {\r | |
cea9bda0 | 347 | UINT32 Value;\r |
348 | \r | |
2ce31132 | 349 | ASSERT ((Address & 3) == 0);\r |
cea9bda0 | 350 | Value = *(volatile UINT32*)Address;\r |
351 | return Value;\r | |
2ce31132 | 352 | }\r |
353 | \r | |
354 | /**\r | |
355 | Writes a 32-bit MMIO register.\r | |
356 | \r | |
357 | Writes the 32-bit MMIO register specified by Address with the value specified\r | |
358 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
359 | and write operations are serialized.\r | |
360 | \r | |
361 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
362 | \r | |
363 | @param Address The MMIO register to write.\r | |
364 | @param Value The value to write to the MMIO register.\r | |
365 | \r | |
366 | **/\r | |
367 | UINT32\r | |
368 | EFIAPI\r | |
369 | MmioWrite32 (\r | |
370 | IN UINTN Address,\r | |
371 | IN UINT32 Value\r | |
372 | )\r | |
373 | {\r | |
374 | ASSERT ((Address & 3) == 0);\r | |
cea9bda0 | 375 | return *(volatile UINT32*)Address = Value;\r |
2ce31132 | 376 | }\r |
377 | \r | |
378 | /**\r | |
379 | Reads a 64-bit MMIO register.\r | |
380 | \r | |
381 | Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r | |
382 | returned. This function must guarantee that all MMIO read and write\r | |
383 | operations are serialized.\r | |
384 | \r | |
385 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
386 | \r | |
387 | @param Address The MMIO register to read.\r | |
388 | \r | |
389 | @return The value read.\r | |
390 | \r | |
391 | **/\r | |
392 | UINT64\r | |
393 | EFIAPI\r | |
394 | MmioRead64 (\r | |
395 | IN UINTN Address\r | |
396 | )\r | |
397 | {\r | |
cea9bda0 | 398 | UINT64 Value;\r |
399 | \r | |
2ce31132 | 400 | ASSERT ((Address & 7) == 0);\r |
cea9bda0 | 401 | Value = *(volatile UINT64*)Address;\r |
402 | return Value;\r | |
2ce31132 | 403 | }\r |
404 | \r | |
405 | /**\r | |
406 | Writes a 64-bit MMIO register.\r | |
407 | \r | |
408 | Writes the 64-bit MMIO register specified by Address with the value specified\r | |
409 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
410 | and write operations are serialized.\r | |
411 | \r | |
412 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
413 | \r | |
414 | @param Address The MMIO register to write.\r | |
415 | @param Value The value to write to the MMIO register.\r | |
416 | \r | |
417 | **/\r | |
418 | UINT64\r | |
419 | EFIAPI\r | |
420 | MmioWrite64 (\r | |
421 | IN UINTN Address,\r | |
422 | IN UINT64 Value\r | |
423 | )\r | |
424 | {\r | |
425 | ASSERT ((Address & 7) == 0);\r | |
cea9bda0 | 426 | return *(volatile UINT64*)Address = Value;\r |
2ce31132 | 427 | }\r |
428 | \r | |
878ddf1f | 429 | #endif\r |