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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 - 2007, 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 |
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20 | **/\r |
21 | \r |
22 | \r |
23 | //\r |
24 | // Include common header file for this module.\r |
25 | //\r |
f734a10a |
26 | #include "BaseIoLibIntrinsicInternal.h"\r |
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27 | \r |
28 | //\r |
29 | // Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics\r |
30 | //\r |
31 | int _inp (unsigned short port);\r |
32 | unsigned short _inpw (unsigned short port);\r |
33 | unsigned long _inpd (unsigned short port);\r |
34 | int _outp (unsigned short port, int databyte );\r |
35 | unsigned short _outpw (unsigned short port, unsigned short dataword );\r |
36 | unsigned long _outpd (unsigned short port, unsigned long dataword );\r |
37 | void _ReadWriteBarrier (void);\r |
38 | \r |
dcab253b |
39 | #ifdef _MSC_VER\r |
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40 | #pragma intrinsic(_inp)\r |
41 | #pragma intrinsic(_inpw)\r |
42 | #pragma intrinsic(_inpd)\r |
43 | #pragma intrinsic(_outp)\r |
44 | #pragma intrinsic(_outpw)\r |
45 | #pragma intrinsic(_outpd)\r |
46 | #pragma intrinsic(_ReadWriteBarrier)\r |
dcab253b |
47 | #endif \r |
e1f414b6 |
48 | //\r |
49 | // _ReadWriteBarrier() forces memory reads and writes to complete at the point\r |
50 | // in the call. This is only a hint to the compiler and does emit code.\r |
51 | // In past versions of the compiler, _ReadWriteBarrier was enforced only\r |
52 | // locally and did not affect functions up the call tree. In Visual C++\r |
53 | // 2005, _ReadWriteBarrier is enforced all the way up the call tree.\r |
54 | //\r |
55 | \r |
56 | /**\r |
57 | Reads an 8-bit I/O port.\r |
58 | \r |
59 | Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.\r |
60 | This function must guarantee that all I/O read and write operations are\r |
61 | serialized.\r |
62 | \r |
63 | If 8-bit I/O port operations are not supported, then ASSERT().\r |
64 | \r |
65 | @param Port The I/O port to read.\r |
66 | \r |
67 | @return The value read.\r |
68 | \r |
69 | **/\r |
70 | UINT8\r |
71 | EFIAPI\r |
72 | IoRead8 (\r |
73 | IN UINTN Port\r |
74 | )\r |
75 | {\r |
76 | UINT8 Value;\r |
77 | \r |
78 | _ReadWriteBarrier ();\r |
79 | Value = (UINT8)_inp ((UINT16)Port);\r |
80 | _ReadWriteBarrier ();\r |
81 | return Value;\r |
82 | }\r |
83 | \r |
84 | /**\r |
85 | Writes an 8-bit I/O port.\r |
86 | \r |
87 | Writes the 8-bit I/O port specified by Port with the value specified by Value\r |
88 | and returns Value. This function must guarantee that all I/O read and write\r |
89 | operations are serialized.\r |
90 | \r |
91 | If 8-bit I/O port operations are not supported, then ASSERT().\r |
92 | \r |
93 | @param Port The I/O port to write.\r |
94 | @param Value The value to write to the I/O port.\r |
95 | \r |
96 | @return The value written the I/O port.\r |
97 | \r |
98 | **/\r |
99 | UINT8\r |
100 | EFIAPI\r |
101 | IoWrite8 (\r |
102 | IN UINTN Port,\r |
103 | IN UINT8 Value\r |
104 | )\r |
105 | {\r |
106 | _ReadWriteBarrier ();\r |
107 | (UINT8)_outp ((UINT16)Port, Value);\r |
108 | _ReadWriteBarrier ();\r |
109 | return Value;\r |
110 | }\r |
111 | \r |
112 | /**\r |
113 | Reads a 16-bit I/O port.\r |
114 | \r |
115 | Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.\r |
116 | This function must guarantee that all I/O read and write operations are\r |
117 | serialized.\r |
118 | \r |
119 | If 16-bit I/O port operations are not supported, then ASSERT().\r |
120 | \r |
121 | @param Port The I/O port to read.\r |
122 | \r |
123 | @return The value read.\r |
124 | \r |
125 | **/\r |
126 | UINT16\r |
127 | EFIAPI\r |
128 | IoRead16 (\r |
129 | IN UINTN Port\r |
130 | )\r |
131 | {\r |
132 | UINT16 Value;\r |
133 | \r |
134 | ASSERT ((Port & 1) == 0);\r |
135 | _ReadWriteBarrier ();\r |
136 | Value = _inpw ((UINT16)Port);\r |
137 | _ReadWriteBarrier ();\r |
138 | return Value;\r |
139 | }\r |
140 | \r |
141 | /**\r |
142 | Writes a 16-bit I/O port.\r |
143 | \r |
144 | Writes the 16-bit I/O port specified by Port with the value specified by Value\r |
145 | and returns Value. This function must guarantee that all I/O read and write\r |
146 | operations are serialized.\r |
147 | \r |
148 | If 16-bit I/O port operations are not supported, then ASSERT().\r |
149 | \r |
150 | @param Port The I/O port to write.\r |
151 | @param Value The value to write to the I/O port.\r |
152 | \r |
153 | @return The value written the I/O port.\r |
154 | \r |
155 | **/\r |
156 | UINT16\r |
157 | EFIAPI\r |
158 | IoWrite16 (\r |
159 | IN UINTN Port,\r |
160 | IN UINT16 Value\r |
161 | )\r |
162 | {\r |
163 | ASSERT ((Port & 1) == 0);\r |
164 | _ReadWriteBarrier ();\r |
165 | _outpw ((UINT16)Port, Value);\r |
166 | _ReadWriteBarrier ();\r |
167 | return Value;\r |
168 | }\r |
169 | \r |
170 | /**\r |
171 | Reads a 32-bit I/O port.\r |
172 | \r |
173 | Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.\r |
174 | This function must guarantee that all I/O read and write operations are\r |
175 | serialized.\r |
176 | \r |
177 | If 32-bit I/O port operations are not supported, then ASSERT().\r |
178 | \r |
179 | @param Port The I/O port to read.\r |
180 | \r |
181 | @return The value read.\r |
182 | \r |
183 | **/\r |
184 | UINT32\r |
185 | EFIAPI\r |
186 | IoRead32 (\r |
187 | IN UINTN Port\r |
188 | )\r |
189 | {\r |
190 | UINT32 Value;\r |
191 | \r |
192 | ASSERT ((Port & 3) == 0);\r |
193 | _ReadWriteBarrier ();\r |
194 | Value = _inpd ((UINT16)Port);\r |
195 | _ReadWriteBarrier ();\r |
196 | return Value;\r |
197 | }\r |
198 | \r |
199 | /**\r |
200 | Writes a 32-bit I/O port.\r |
201 | \r |
202 | Writes the 32-bit I/O port specified by Port with the value specified by Value\r |
203 | and returns Value. This function must guarantee that all I/O read and write\r |
204 | operations are serialized.\r |
205 | \r |
206 | If 32-bit I/O port operations are not supported, then ASSERT().\r |
207 | \r |
208 | @param Port The I/O port to write.\r |
209 | @param Value The value to write to the I/O port.\r |
210 | \r |
211 | @return The value written the I/O port.\r |
212 | \r |
213 | **/\r |
214 | UINT32\r |
215 | EFIAPI\r |
216 | IoWrite32 (\r |
217 | IN UINTN Port,\r |
218 | IN UINT32 Value\r |
219 | )\r |
220 | {\r |
221 | ASSERT ((Port & 3) == 0);\r |
222 | _ReadWriteBarrier ();\r |
223 | _outpd ((UINT16)Port, Value);\r |
224 | _ReadWriteBarrier ();\r |
225 | return Value;\r |
226 | }\r |
227 | \r |
228 | \r |
229 | /**\r |
230 | Reads an 8-bit MMIO register.\r |
231 | \r |
232 | Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r |
233 | returned. This function must guarantee that all MMIO read and write\r |
234 | operations are serialized.\r |
235 | \r |
236 | If 8-bit MMIO register operations are not supported, then ASSERT().\r |
237 | \r |
238 | @param Address The MMIO register to read.\r |
239 | \r |
240 | @return The value read.\r |
241 | \r |
242 | **/\r |
243 | UINT8\r |
244 | EFIAPI\r |
245 | MmioRead8 (\r |
246 | IN UINTN Address\r |
247 | )\r |
248 | {\r |
249 | UINT8 Value;\r |
250 | \r |
251 | Value = *(volatile UINT8*)Address;\r |
252 | return Value;\r |
253 | }\r |
254 | \r |
255 | /**\r |
256 | Writes an 8-bit MMIO register.\r |
257 | \r |
258 | Writes the 8-bit MMIO register specified by Address with the value specified\r |
259 | by Value and returns Value. This function must guarantee that all MMIO read\r |
260 | and write operations are serialized.\r |
261 | \r |
262 | If 8-bit MMIO register operations are not supported, then ASSERT().\r |
263 | \r |
264 | @param Address The MMIO register to write.\r |
265 | @param Value The value to write to the MMIO register.\r |
266 | \r |
267 | **/\r |
268 | UINT8\r |
269 | EFIAPI\r |
270 | MmioWrite8 (\r |
271 | IN UINTN Address,\r |
272 | IN UINT8 Value\r |
273 | )\r |
274 | {\r |
275 | return *(volatile UINT8*)Address = Value;\r |
276 | }\r |
277 | \r |
278 | /**\r |
279 | Reads a 16-bit MMIO register.\r |
280 | \r |
281 | Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r |
282 | returned. This function must guarantee that all MMIO read and write\r |
283 | operations are serialized.\r |
284 | \r |
285 | If 16-bit MMIO register operations are not supported, then ASSERT().\r |
286 | \r |
287 | @param Address The MMIO register to read.\r |
288 | \r |
289 | @return The value read.\r |
290 | \r |
291 | **/\r |
292 | UINT16\r |
293 | EFIAPI\r |
294 | MmioRead16 (\r |
295 | IN UINTN Address\r |
296 | )\r |
297 | {\r |
298 | UINT16 Value;\r |
299 | \r |
300 | ASSERT ((Address & 1) == 0);\r |
301 | Value = *(volatile UINT16*)Address;\r |
302 | return Value;\r |
303 | }\r |
304 | \r |
305 | /**\r |
306 | Writes a 16-bit MMIO register.\r |
307 | \r |
308 | Writes the 16-bit MMIO register specified by Address with the value specified\r |
309 | by Value and returns Value. This function must guarantee that all MMIO read\r |
310 | and write operations are serialized.\r |
311 | \r |
312 | If 16-bit MMIO register operations are not supported, then ASSERT().\r |
313 | \r |
314 | @param Address The MMIO register to write.\r |
315 | @param Value The value to write to the MMIO register.\r |
316 | \r |
317 | **/\r |
318 | UINT16\r |
319 | EFIAPI\r |
320 | MmioWrite16 (\r |
321 | IN UINTN Address,\r |
322 | IN UINT16 Value\r |
323 | )\r |
324 | {\r |
325 | ASSERT ((Address & 1) == 0);\r |
326 | return *(volatile UINT16*)Address = Value;\r |
327 | }\r |
328 | \r |
329 | /**\r |
330 | Reads a 32-bit MMIO register.\r |
331 | \r |
332 | Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r |
333 | returned. This function must guarantee that all MMIO read and write\r |
334 | operations are serialized.\r |
335 | \r |
336 | If 32-bit MMIO register operations are not supported, then ASSERT().\r |
337 | \r |
338 | @param Address The MMIO register to read.\r |
339 | \r |
340 | @return The value read.\r |
341 | \r |
342 | **/\r |
343 | UINT32\r |
344 | EFIAPI\r |
345 | MmioRead32 (\r |
346 | IN UINTN Address\r |
347 | )\r |
348 | {\r |
349 | UINT32 Value;\r |
350 | \r |
351 | ASSERT ((Address & 3) == 0);\r |
352 | Value = *(volatile UINT32*)Address;\r |
353 | return Value;\r |
354 | }\r |
355 | \r |
356 | /**\r |
357 | Writes a 32-bit MMIO register.\r |
358 | \r |
359 | Writes the 32-bit MMIO register specified by Address with the value specified\r |
360 | by Value and returns Value. This function must guarantee that all MMIO read\r |
361 | and write operations are serialized.\r |
362 | \r |
363 | If 32-bit MMIO register operations are not supported, then ASSERT().\r |
364 | \r |
365 | @param Address The MMIO register to write.\r |
366 | @param Value The value to write to the MMIO register.\r |
367 | \r |
368 | **/\r |
369 | UINT32\r |
370 | EFIAPI\r |
371 | MmioWrite32 (\r |
372 | IN UINTN Address,\r |
373 | IN UINT32 Value\r |
374 | )\r |
375 | {\r |
376 | ASSERT ((Address & 3) == 0);\r |
377 | return *(volatile UINT32*)Address = Value;\r |
378 | }\r |
379 | \r |
380 | /**\r |
381 | Reads a 64-bit MMIO register.\r |
382 | \r |
383 | Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r |
384 | returned. This function must guarantee that all MMIO read and write\r |
385 | operations are serialized.\r |
386 | \r |
387 | If 64-bit MMIO register operations are not supported, then ASSERT().\r |
388 | \r |
389 | @param Address The MMIO register to read.\r |
390 | \r |
391 | @return The value read.\r |
392 | \r |
393 | **/\r |
394 | UINT64\r |
395 | EFIAPI\r |
396 | MmioRead64 (\r |
397 | IN UINTN Address\r |
398 | )\r |
399 | {\r |
400 | UINT64 Value;\r |
401 | \r |
402 | ASSERT ((Address & 7) == 0);\r |
403 | Value = *(volatile UINT64*)Address;\r |
404 | return Value;\r |
405 | }\r |
406 | \r |
407 | /**\r |
408 | Writes a 64-bit MMIO register.\r |
409 | \r |
410 | Writes the 64-bit MMIO register specified by Address with the value specified\r |
411 | by Value and returns Value. This function must guarantee that all MMIO read\r |
412 | and write operations are serialized.\r |
413 | \r |
414 | If 64-bit MMIO register operations are not supported, then ASSERT().\r |
415 | \r |
416 | @param Address The MMIO register to write.\r |
417 | @param Value The value to write to the MMIO register.\r |
418 | \r |
419 | **/\r |
420 | UINT64\r |
421 | EFIAPI\r |
422 | MmioWrite64 (\r |
423 | IN UINTN Address,\r |
424 | IN UINT64 Value\r |
425 | )\r |
426 | {\r |
427 | ASSERT ((Address & 7) == 0);\r |
428 | return *(volatile UINT64*)Address = Value;\r |
429 | }\r |
430 | \r |