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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 |
39 | #pragma intrinsic(_inp)\r |
40 | #pragma intrinsic(_inpw)\r |
41 | #pragma intrinsic(_inpd)\r |
42 | #pragma intrinsic(_outp)\r |
43 | #pragma intrinsic(_outpw)\r |
44 | #pragma intrinsic(_outpd)\r |
45 | #pragma intrinsic(_ReadWriteBarrier)\r |
986352be |
46 | \r |
e1f414b6 |
47 | //\r |
48 | // _ReadWriteBarrier() forces memory reads and writes to complete at the point\r |
49 | // in the call. This is only a hint to the compiler and does emit code.\r |
50 | // In past versions of the compiler, _ReadWriteBarrier was enforced only\r |
51 | // locally and did not affect functions up the call tree. In Visual C++\r |
52 | // 2005, _ReadWriteBarrier is enforced all the way up the call tree.\r |
53 | //\r |
54 | \r |
55 | /**\r |
56 | Reads an 8-bit I/O port.\r |
57 | \r |
58 | Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.\r |
59 | This function must guarantee that all I/O read and write operations are\r |
60 | serialized.\r |
61 | \r |
62 | If 8-bit I/O port operations are not supported, then ASSERT().\r |
63 | \r |
64 | @param Port The I/O port to read.\r |
65 | \r |
66 | @return The value read.\r |
67 | \r |
68 | **/\r |
69 | UINT8\r |
70 | EFIAPI\r |
71 | IoRead8 (\r |
72 | IN UINTN Port\r |
73 | )\r |
74 | {\r |
75 | UINT8 Value;\r |
76 | \r |
77 | _ReadWriteBarrier ();\r |
78 | Value = (UINT8)_inp ((UINT16)Port);\r |
79 | _ReadWriteBarrier ();\r |
80 | return Value;\r |
81 | }\r |
82 | \r |
83 | /**\r |
84 | Writes an 8-bit I/O port.\r |
85 | \r |
86 | Writes the 8-bit I/O port specified by Port with the value specified by Value\r |
87 | and returns Value. This function must guarantee that all I/O read and write\r |
88 | operations are serialized.\r |
89 | \r |
90 | If 8-bit I/O port operations are not supported, then ASSERT().\r |
91 | \r |
92 | @param Port The I/O port to write.\r |
93 | @param Value The value to write to the I/O port.\r |
94 | \r |
95 | @return The value written the I/O port.\r |
96 | \r |
97 | **/\r |
98 | UINT8\r |
99 | EFIAPI\r |
100 | IoWrite8 (\r |
101 | IN UINTN Port,\r |
102 | IN UINT8 Value\r |
103 | )\r |
104 | {\r |
105 | _ReadWriteBarrier ();\r |
106 | (UINT8)_outp ((UINT16)Port, Value);\r |
107 | _ReadWriteBarrier ();\r |
108 | return Value;\r |
109 | }\r |
110 | \r |
111 | /**\r |
112 | Reads a 16-bit I/O port.\r |
113 | \r |
114 | Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.\r |
115 | This function must guarantee that all I/O read and write operations are\r |
116 | serialized.\r |
117 | \r |
118 | If 16-bit I/O port operations are not supported, then ASSERT().\r |
119 | \r |
120 | @param Port The I/O port to read.\r |
121 | \r |
122 | @return The value read.\r |
123 | \r |
124 | **/\r |
125 | UINT16\r |
126 | EFIAPI\r |
127 | IoRead16 (\r |
128 | IN UINTN Port\r |
129 | )\r |
130 | {\r |
131 | UINT16 Value;\r |
132 | \r |
133 | ASSERT ((Port & 1) == 0);\r |
134 | _ReadWriteBarrier ();\r |
135 | Value = _inpw ((UINT16)Port);\r |
136 | _ReadWriteBarrier ();\r |
137 | return Value;\r |
138 | }\r |
139 | \r |
140 | /**\r |
141 | Writes a 16-bit I/O port.\r |
142 | \r |
143 | Writes the 16-bit I/O port specified by Port with the value specified by Value\r |
144 | and returns Value. This function must guarantee that all I/O read and write\r |
145 | operations are serialized.\r |
146 | \r |
147 | If 16-bit I/O port operations are not supported, then ASSERT().\r |
148 | \r |
149 | @param Port The I/O port to write.\r |
150 | @param Value The value to write to the I/O port.\r |
151 | \r |
152 | @return The value written the I/O port.\r |
153 | \r |
154 | **/\r |
155 | UINT16\r |
156 | EFIAPI\r |
157 | IoWrite16 (\r |
158 | IN UINTN Port,\r |
159 | IN UINT16 Value\r |
160 | )\r |
161 | {\r |
162 | ASSERT ((Port & 1) == 0);\r |
163 | _ReadWriteBarrier ();\r |
164 | _outpw ((UINT16)Port, Value);\r |
165 | _ReadWriteBarrier ();\r |
166 | return Value;\r |
167 | }\r |
168 | \r |
169 | /**\r |
170 | Reads a 32-bit I/O port.\r |
171 | \r |
172 | Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.\r |
173 | This function must guarantee that all I/O read and write operations are\r |
174 | serialized.\r |
175 | \r |
176 | If 32-bit I/O port operations are not supported, then ASSERT().\r |
177 | \r |
178 | @param Port The I/O port to read.\r |
179 | \r |
180 | @return The value read.\r |
181 | \r |
182 | **/\r |
183 | UINT32\r |
184 | EFIAPI\r |
185 | IoRead32 (\r |
186 | IN UINTN Port\r |
187 | )\r |
188 | {\r |
189 | UINT32 Value;\r |
190 | \r |
191 | ASSERT ((Port & 3) == 0);\r |
192 | _ReadWriteBarrier ();\r |
193 | Value = _inpd ((UINT16)Port);\r |
194 | _ReadWriteBarrier ();\r |
195 | return Value;\r |
196 | }\r |
197 | \r |
198 | /**\r |
199 | Writes a 32-bit I/O port.\r |
200 | \r |
201 | Writes the 32-bit I/O port specified by Port with the value specified by Value\r |
202 | and returns Value. This function must guarantee that all I/O read and write\r |
203 | operations are serialized.\r |
204 | \r |
205 | If 32-bit I/O port operations are not supported, then ASSERT().\r |
206 | \r |
207 | @param Port The I/O port to write.\r |
208 | @param Value The value to write to the I/O port.\r |
209 | \r |
210 | @return The value written the I/O port.\r |
211 | \r |
212 | **/\r |
213 | UINT32\r |
214 | EFIAPI\r |
215 | IoWrite32 (\r |
216 | IN UINTN Port,\r |
217 | IN UINT32 Value\r |
218 | )\r |
219 | {\r |
220 | ASSERT ((Port & 3) == 0);\r |
221 | _ReadWriteBarrier ();\r |
222 | _outpd ((UINT16)Port, Value);\r |
223 | _ReadWriteBarrier ();\r |
224 | return Value;\r |
225 | }\r |
226 | \r |
227 | \r |
228 | /**\r |
229 | Reads an 8-bit MMIO register.\r |
230 | \r |
231 | Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r |
232 | returned. This function must guarantee that all MMIO read and write\r |
233 | operations are serialized.\r |
234 | \r |
235 | If 8-bit MMIO register operations are not supported, then ASSERT().\r |
236 | \r |
237 | @param Address The MMIO register to read.\r |
238 | \r |
239 | @return The value read.\r |
240 | \r |
241 | **/\r |
242 | UINT8\r |
243 | EFIAPI\r |
244 | MmioRead8 (\r |
245 | IN UINTN Address\r |
246 | )\r |
247 | {\r |
248 | UINT8 Value;\r |
249 | \r |
250 | Value = *(volatile UINT8*)Address;\r |
251 | return Value;\r |
252 | }\r |
253 | \r |
254 | /**\r |
255 | Writes an 8-bit MMIO register.\r |
256 | \r |
257 | Writes the 8-bit MMIO register specified by Address with the value specified\r |
258 | by Value and returns Value. This function must guarantee that all MMIO read\r |
259 | and write operations are serialized.\r |
260 | \r |
261 | If 8-bit MMIO register operations are not supported, then ASSERT().\r |
262 | \r |
263 | @param Address The MMIO register to write.\r |
264 | @param Value The value to write to the MMIO register.\r |
265 | \r |
266 | **/\r |
267 | UINT8\r |
268 | EFIAPI\r |
269 | MmioWrite8 (\r |
270 | IN UINTN Address,\r |
271 | IN UINT8 Value\r |
272 | )\r |
273 | {\r |
274 | return *(volatile UINT8*)Address = Value;\r |
275 | }\r |
276 | \r |
277 | /**\r |
278 | Reads a 16-bit MMIO register.\r |
279 | \r |
280 | Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r |
281 | returned. This function must guarantee that all MMIO read and write\r |
282 | operations are serialized.\r |
283 | \r |
284 | If 16-bit MMIO register operations are not supported, then ASSERT().\r |
285 | \r |
286 | @param Address The MMIO register to read.\r |
287 | \r |
288 | @return The value read.\r |
289 | \r |
290 | **/\r |
291 | UINT16\r |
292 | EFIAPI\r |
293 | MmioRead16 (\r |
294 | IN UINTN Address\r |
295 | )\r |
296 | {\r |
297 | UINT16 Value;\r |
298 | \r |
299 | ASSERT ((Address & 1) == 0);\r |
300 | Value = *(volatile UINT16*)Address;\r |
301 | return Value;\r |
302 | }\r |
303 | \r |
304 | /**\r |
305 | Writes a 16-bit MMIO register.\r |
306 | \r |
307 | Writes the 16-bit MMIO register specified by Address with the value specified\r |
308 | by Value and returns Value. This function must guarantee that all MMIO read\r |
309 | and write operations are serialized.\r |
310 | \r |
311 | If 16-bit MMIO register operations are not supported, then ASSERT().\r |
312 | \r |
313 | @param Address The MMIO register to write.\r |
314 | @param Value The value to write to the MMIO register.\r |
315 | \r |
316 | **/\r |
317 | UINT16\r |
318 | EFIAPI\r |
319 | MmioWrite16 (\r |
320 | IN UINTN Address,\r |
321 | IN UINT16 Value\r |
322 | )\r |
323 | {\r |
324 | ASSERT ((Address & 1) == 0);\r |
325 | return *(volatile UINT16*)Address = Value;\r |
326 | }\r |
327 | \r |
328 | /**\r |
329 | Reads a 32-bit MMIO register.\r |
330 | \r |
331 | Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r |
332 | returned. This function must guarantee that all MMIO read and write\r |
333 | operations are serialized.\r |
334 | \r |
335 | If 32-bit MMIO register operations are not supported, then ASSERT().\r |
336 | \r |
337 | @param Address The MMIO register to read.\r |
338 | \r |
339 | @return The value read.\r |
340 | \r |
341 | **/\r |
342 | UINT32\r |
343 | EFIAPI\r |
344 | MmioRead32 (\r |
345 | IN UINTN Address\r |
346 | )\r |
347 | {\r |
348 | UINT32 Value;\r |
349 | \r |
350 | ASSERT ((Address & 3) == 0);\r |
351 | Value = *(volatile UINT32*)Address;\r |
352 | return Value;\r |
353 | }\r |
354 | \r |
355 | /**\r |
356 | Writes a 32-bit MMIO register.\r |
357 | \r |
358 | Writes the 32-bit MMIO register specified by Address with the value specified\r |
359 | by Value and returns Value. This function must guarantee that all MMIO read\r |
360 | and write operations are serialized.\r |
361 | \r |
362 | If 32-bit MMIO register operations are not supported, then ASSERT().\r |
363 | \r |
364 | @param Address The MMIO register to write.\r |
365 | @param Value The value to write to the MMIO register.\r |
366 | \r |
367 | **/\r |
368 | UINT32\r |
369 | EFIAPI\r |
370 | MmioWrite32 (\r |
371 | IN UINTN Address,\r |
372 | IN UINT32 Value\r |
373 | )\r |
374 | {\r |
375 | ASSERT ((Address & 3) == 0);\r |
376 | return *(volatile UINT32*)Address = Value;\r |
377 | }\r |
378 | \r |
379 | /**\r |
380 | Reads a 64-bit MMIO register.\r |
381 | \r |
382 | Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r |
383 | returned. This function must guarantee that all MMIO read and write\r |
384 | operations are serialized.\r |
385 | \r |
386 | If 64-bit MMIO register operations are not supported, then ASSERT().\r |
387 | \r |
388 | @param Address The MMIO register to read.\r |
389 | \r |
390 | @return The value read.\r |
391 | \r |
392 | **/\r |
393 | UINT64\r |
394 | EFIAPI\r |
395 | MmioRead64 (\r |
396 | IN UINTN Address\r |
397 | )\r |
398 | {\r |
399 | UINT64 Value;\r |
400 | \r |
401 | ASSERT ((Address & 7) == 0);\r |
402 | Value = *(volatile UINT64*)Address;\r |
403 | return Value;\r |
404 | }\r |
405 | \r |
406 | /**\r |
407 | Writes a 64-bit MMIO register.\r |
408 | \r |
409 | Writes the 64-bit MMIO register specified by Address with the value specified\r |
410 | by Value and returns Value. This function must guarantee that all MMIO read\r |
411 | and write operations are serialized.\r |
412 | \r |
413 | If 64-bit MMIO register operations are not supported, then ASSERT().\r |
414 | \r |
415 | @param Address The MMIO register to write.\r |
416 | @param Value The value to write to the MMIO register.\r |
417 | \r |
418 | **/\r |
419 | UINT64\r |
420 | EFIAPI\r |
421 | MmioWrite64 (\r |
422 | IN UINTN Address,\r |
423 | IN UINT64 Value\r |
424 | )\r |
425 | {\r |
426 | ASSERT ((Address & 7) == 0);\r |
427 | return *(volatile UINT64*)Address = Value;\r |
428 | }\r |
429 | \r |