]>
Commit | Line | Data |
---|---|---|
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 | |
e5f461a8 | 11 | Copyright (c) 2006 - 2007, Intel Corporation<BR>\r |
878ddf1f | 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 | |
878ddf1f | 25 | //\r |
26 | // Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics\r | |
27 | //\r | |
2ce31132 | 28 | int _inp (unsigned short port);\r |
878ddf1f | 29 | unsigned short _inpw (unsigned short port);\r |
30 | unsigned long _inpd (unsigned short port);\r | |
31 | int _outp (unsigned short port, int databyte );\r | |
2ce31132 | 32 | unsigned short _outpw (unsigned short port, unsigned short dataword );\r |
33 | unsigned long _outpd (unsigned short port, unsigned long dataword );\r | |
34 | void _ReadWriteBarrier (void);\r | |
878ddf1f | 35 | \r |
36 | #pragma intrinsic(_inp)\r | |
37 | #pragma intrinsic(_inpw)\r | |
38 | #pragma intrinsic(_inpd)\r | |
39 | #pragma intrinsic(_outp)\r | |
40 | #pragma intrinsic(_outpw)\r | |
41 | #pragma intrinsic(_outpd)\r | |
2ce31132 | 42 | #pragma intrinsic(_ReadWriteBarrier)\r |
878ddf1f | 43 | \r |
2ce31132 | 44 | //\r |
45 | // _ReadWriteBarrier() forces memory reads and writes to complete at the point\r | |
46 | // in the call. This is only a hint to the compiler and does emit code.\r | |
cea9bda0 | 47 | // In past versions of the compiler, _ReadWriteBarrier was enforced only\r |
48 | // locally and did not affect functions up the call tree. In Visual C++\r | |
2ce31132 | 49 | // 2005, _ReadWriteBarrier is enforced all the way up the call tree.\r |
50 | //\r | |
878ddf1f | 51 | \r |
52 | /**\r | |
53 | Reads an 8-bit I/O port.\r | |
54 | \r | |
55 | Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.\r | |
56 | This function must guarantee that all I/O read and write operations are\r | |
57 | serialized.\r | |
58 | \r | |
59 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
60 | \r | |
61 | @param Port The I/O port to read.\r | |
62 | \r | |
63 | @return The value read.\r | |
64 | \r | |
65 | **/\r | |
66 | UINT8\r | |
67 | EFIAPI\r | |
68 | IoRead8 (\r | |
69 | IN UINTN Port\r | |
70 | )\r | |
71 | {\r | |
cea9bda0 | 72 | UINT8 Value;\r |
73 | \r | |
74 | _ReadWriteBarrier ();\r | |
75 | Value = (UINT8)_inp ((UINT16)Port);\r | |
2ce31132 | 76 | _ReadWriteBarrier ();\r |
cea9bda0 | 77 | return Value;\r |
878ddf1f | 78 | }\r |
79 | \r | |
80 | /**\r | |
81 | Writes an 8-bit I/O port.\r | |
82 | \r | |
83 | Writes the 8-bit I/O port specified by Port with the value specified by Value\r | |
84 | and returns Value. This function must guarantee that all I/O read and write\r | |
85 | operations are serialized.\r | |
86 | \r | |
87 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
88 | \r | |
89 | @param Port The I/O port to write.\r | |
90 | @param Value The value to write to the I/O port.\r | |
91 | \r | |
92 | @return The value written the I/O port.\r | |
93 | \r | |
94 | **/\r | |
95 | UINT8\r | |
96 | EFIAPI\r | |
97 | IoWrite8 (\r | |
98 | IN UINTN Port,\r | |
99 | IN UINT8 Value\r | |
100 | )\r | |
101 | {\r | |
2ce31132 | 102 | _ReadWriteBarrier ();\r |
cea9bda0 | 103 | (UINT8)_outp ((UINT16)Port, Value);\r |
104 | _ReadWriteBarrier ();\r | |
105 | return Value;\r | |
878ddf1f | 106 | }\r |
107 | \r | |
108 | /**\r | |
109 | Reads a 16-bit I/O port.\r | |
110 | \r | |
111 | Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.\r | |
112 | This function must guarantee that all I/O read and write operations are\r | |
113 | serialized.\r | |
114 | \r | |
115 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
116 | \r | |
117 | @param Port The I/O port to read.\r | |
118 | \r | |
119 | @return The value read.\r | |
120 | \r | |
121 | **/\r | |
122 | UINT16\r | |
123 | EFIAPI\r | |
124 | IoRead16 (\r | |
125 | IN UINTN Port\r | |
126 | )\r | |
127 | {\r | |
cea9bda0 | 128 | UINT16 Value;\r |
129 | \r | |
878ddf1f | 130 | ASSERT ((Port & 1) == 0);\r |
2ce31132 | 131 | _ReadWriteBarrier ();\r |
cea9bda0 | 132 | Value = _inpw ((UINT16)Port);\r |
133 | _ReadWriteBarrier ();\r | |
134 | return Value;\r | |
878ddf1f | 135 | }\r |
136 | \r | |
137 | /**\r | |
138 | Writes a 16-bit I/O port.\r | |
139 | \r | |
140 | Writes the 16-bit I/O port specified by Port with the value specified by Value\r | |
141 | and returns Value. This function must guarantee that all I/O read and write\r | |
142 | operations are serialized.\r | |
143 | \r | |
144 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
145 | \r | |
146 | @param Port The I/O port to write.\r | |
147 | @param Value The value to write to the I/O port.\r | |
148 | \r | |
149 | @return The value written the I/O port.\r | |
150 | \r | |
151 | **/\r | |
152 | UINT16\r | |
153 | EFIAPI\r | |
154 | IoWrite16 (\r | |
155 | IN UINTN Port,\r | |
156 | IN UINT16 Value\r | |
157 | )\r | |
158 | {\r | |
159 | ASSERT ((Port & 1) == 0);\r | |
2ce31132 | 160 | _ReadWriteBarrier ();\r |
cea9bda0 | 161 | _outpw ((UINT16)Port, Value);\r |
162 | _ReadWriteBarrier ();\r | |
163 | return Value;\r | |
878ddf1f | 164 | }\r |
165 | \r | |
166 | /**\r | |
167 | Reads a 32-bit I/O port.\r | |
168 | \r | |
169 | Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.\r | |
170 | This function must guarantee that all I/O read and write operations are\r | |
171 | serialized.\r | |
172 | \r | |
173 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
174 | \r | |
175 | @param Port The I/O port to read.\r | |
176 | \r | |
177 | @return The value read.\r | |
178 | \r | |
179 | **/\r | |
180 | UINT32\r | |
181 | EFIAPI\r | |
182 | IoRead32 (\r | |
183 | IN UINTN Port\r | |
184 | )\r | |
185 | {\r | |
cea9bda0 | 186 | UINT32 Value;\r |
187 | \r | |
878ddf1f | 188 | ASSERT ((Port & 3) == 0);\r |
2ce31132 | 189 | _ReadWriteBarrier ();\r |
cea9bda0 | 190 | Value = _inpd ((UINT16)Port);\r |
191 | _ReadWriteBarrier ();\r | |
192 | return Value;\r | |
878ddf1f | 193 | }\r |
194 | \r | |
195 | /**\r | |
196 | Writes a 32-bit I/O port.\r | |
197 | \r | |
198 | Writes the 32-bit I/O port specified by Port with the value specified by Value\r | |
199 | and returns Value. This function must guarantee that all I/O read and write\r | |
200 | operations are serialized.\r | |
201 | \r | |
202 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
203 | \r | |
204 | @param Port The I/O port to write.\r | |
205 | @param Value The value to write to the I/O port.\r | |
206 | \r | |
207 | @return The value written the I/O port.\r | |
208 | \r | |
209 | **/\r | |
210 | UINT32\r | |
211 | EFIAPI\r | |
212 | IoWrite32 (\r | |
213 | IN UINTN Port,\r | |
214 | IN UINT32 Value\r | |
215 | )\r | |
216 | {\r | |
217 | ASSERT ((Port & 3) == 0);\r | |
2ce31132 | 218 | _ReadWriteBarrier ();\r |
cea9bda0 | 219 | _outpd ((UINT16)Port, Value);\r |
220 | _ReadWriteBarrier ();\r | |
221 | return Value;\r | |
878ddf1f | 222 | }\r |
223 | \r | |
2ce31132 | 224 | \r |
225 | /**\r | |
226 | Reads an 8-bit MMIO register.\r | |
227 | \r | |
228 | Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r | |
229 | returned. This function must guarantee that all MMIO read and write\r | |
230 | operations are serialized.\r | |
231 | \r | |
232 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
233 | \r | |
234 | @param Address The MMIO register to read.\r | |
235 | \r | |
236 | @return The value read.\r | |
237 | \r | |
238 | **/\r | |
239 | UINT8\r | |
240 | EFIAPI\r | |
241 | MmioRead8 (\r | |
242 | IN UINTN Address\r | |
243 | )\r | |
244 | {\r | |
cea9bda0 | 245 | UINT8 Value;\r |
246 | \r | |
247 | Value = *(volatile UINT8*)Address;\r | |
248 | return Value;\r | |
2ce31132 | 249 | }\r |
250 | \r | |
251 | /**\r | |
252 | Writes an 8-bit MMIO register.\r | |
253 | \r | |
254 | Writes the 8-bit MMIO register specified by Address with the value specified\r | |
255 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
256 | and write operations are serialized.\r | |
257 | \r | |
258 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
259 | \r | |
260 | @param Address The MMIO register to write.\r | |
261 | @param Value The value to write to the MMIO register.\r | |
262 | \r | |
263 | **/\r | |
264 | UINT8\r | |
265 | EFIAPI\r | |
266 | MmioWrite8 (\r | |
267 | IN UINTN Address,\r | |
268 | IN UINT8 Value\r | |
269 | )\r | |
270 | {\r | |
cea9bda0 | 271 | return *(volatile UINT8*)Address = Value;\r |
2ce31132 | 272 | }\r |
273 | \r | |
274 | /**\r | |
275 | Reads a 16-bit MMIO register.\r | |
276 | \r | |
277 | Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r | |
278 | returned. This function must guarantee that all MMIO read and write\r | |
279 | operations are serialized.\r | |
280 | \r | |
281 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
282 | \r | |
283 | @param Address The MMIO register to read.\r | |
284 | \r | |
285 | @return The value read.\r | |
286 | \r | |
287 | **/\r | |
288 | UINT16\r | |
289 | EFIAPI\r | |
290 | MmioRead16 (\r | |
291 | IN UINTN Address\r | |
292 | )\r | |
293 | {\r | |
cea9bda0 | 294 | UINT16 Value;\r |
295 | \r | |
2ce31132 | 296 | ASSERT ((Address & 1) == 0);\r |
cea9bda0 | 297 | Value = *(volatile UINT16*)Address;\r |
298 | return Value;\r | |
2ce31132 | 299 | }\r |
300 | \r | |
301 | /**\r | |
302 | Writes a 16-bit MMIO register.\r | |
303 | \r | |
304 | Writes the 16-bit MMIO register specified by Address with the value specified\r | |
305 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
306 | and write operations are serialized.\r | |
307 | \r | |
308 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
309 | \r | |
310 | @param Address The MMIO register to write.\r | |
311 | @param Value The value to write to the MMIO register.\r | |
312 | \r | |
313 | **/\r | |
314 | UINT16\r | |
315 | EFIAPI\r | |
316 | MmioWrite16 (\r | |
317 | IN UINTN Address,\r | |
318 | IN UINT16 Value\r | |
319 | )\r | |
320 | {\r | |
321 | ASSERT ((Address & 1) == 0);\r | |
cea9bda0 | 322 | return *(volatile UINT16*)Address = Value;\r |
2ce31132 | 323 | }\r |
324 | \r | |
325 | /**\r | |
326 | Reads a 32-bit MMIO register.\r | |
327 | \r | |
328 | Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r | |
329 | returned. This function must guarantee that all MMIO read and write\r | |
330 | operations are serialized.\r | |
331 | \r | |
332 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
333 | \r | |
334 | @param Address The MMIO register to read.\r | |
335 | \r | |
336 | @return The value read.\r | |
337 | \r | |
338 | **/\r | |
339 | UINT32\r | |
340 | EFIAPI\r | |
341 | MmioRead32 (\r | |
342 | IN UINTN Address\r | |
343 | )\r | |
344 | {\r | |
cea9bda0 | 345 | UINT32 Value;\r |
346 | \r | |
2ce31132 | 347 | ASSERT ((Address & 3) == 0);\r |
cea9bda0 | 348 | Value = *(volatile UINT32*)Address;\r |
349 | return Value;\r | |
2ce31132 | 350 | }\r |
351 | \r | |
352 | /**\r | |
353 | Writes a 32-bit MMIO register.\r | |
354 | \r | |
355 | Writes the 32-bit MMIO register specified by Address with the value specified\r | |
356 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
357 | and write operations are serialized.\r | |
358 | \r | |
359 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
360 | \r | |
361 | @param Address The MMIO register to write.\r | |
362 | @param Value The value to write to the MMIO register.\r | |
363 | \r | |
364 | **/\r | |
365 | UINT32\r | |
366 | EFIAPI\r | |
367 | MmioWrite32 (\r | |
368 | IN UINTN Address,\r | |
369 | IN UINT32 Value\r | |
370 | )\r | |
371 | {\r | |
372 | ASSERT ((Address & 3) == 0);\r | |
cea9bda0 | 373 | return *(volatile UINT32*)Address = Value;\r |
2ce31132 | 374 | }\r |
375 | \r | |
376 | /**\r | |
377 | Reads a 64-bit MMIO register.\r | |
378 | \r | |
379 | Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r | |
380 | returned. This function must guarantee that all MMIO read and write\r | |
381 | operations are serialized.\r | |
382 | \r | |
383 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
384 | \r | |
385 | @param Address The MMIO register to read.\r | |
386 | \r | |
387 | @return The value read.\r | |
388 | \r | |
389 | **/\r | |
390 | UINT64\r | |
391 | EFIAPI\r | |
392 | MmioRead64 (\r | |
393 | IN UINTN Address\r | |
394 | )\r | |
395 | {\r | |
cea9bda0 | 396 | UINT64 Value;\r |
397 | \r | |
2ce31132 | 398 | ASSERT ((Address & 7) == 0);\r |
cea9bda0 | 399 | Value = *(volatile UINT64*)Address;\r |
400 | return Value;\r | |
2ce31132 | 401 | }\r |
402 | \r | |
403 | /**\r | |
404 | Writes a 64-bit MMIO register.\r | |
405 | \r | |
406 | Writes the 64-bit MMIO register specified by Address with the value specified\r | |
407 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
408 | and write operations are serialized.\r | |
409 | \r | |
410 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
411 | \r | |
412 | @param Address The MMIO register to write.\r | |
413 | @param Value The value to write to the MMIO register.\r | |
414 | \r | |
415 | **/\r | |
416 | UINT64\r | |
417 | EFIAPI\r | |
418 | MmioWrite64 (\r | |
419 | IN UINTN Address,\r | |
420 | IN UINT64 Value\r | |
421 | )\r | |
422 | {\r | |
423 | ASSERT ((Address & 7) == 0);\r | |
cea9bda0 | 424 | return *(volatile UINT64*)Address = Value;\r |
2ce31132 | 425 | }\r |
426 | \r |