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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 | |
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 | |
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 | |
2ce31132 | 74 | _ReadWriteBarrier ();\r |
878ddf1f | 75 | return (UINT8)_inp ((UINT16)Port);\r |
76 | }\r | |
77 | \r | |
78 | /**\r | |
79 | Writes an 8-bit I/O port.\r | |
80 | \r | |
81 | Writes the 8-bit I/O port specified by Port with the value specified by Value\r | |
82 | and returns Value. This function must guarantee that all I/O read and write\r | |
83 | operations are serialized.\r | |
84 | \r | |
85 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
86 | \r | |
87 | @param Port The I/O port to write.\r | |
88 | @param Value The value to write to the I/O port.\r | |
89 | \r | |
90 | @return The value written the I/O port.\r | |
91 | \r | |
92 | **/\r | |
93 | UINT8\r | |
94 | EFIAPI\r | |
95 | IoWrite8 (\r | |
96 | IN UINTN Port,\r | |
97 | IN UINT8 Value\r | |
98 | )\r | |
99 | {\r | |
2ce31132 | 100 | _ReadWriteBarrier ();\r |
878ddf1f | 101 | return (UINT8)_outp ((UINT16)Port, Value);\r |
102 | }\r | |
103 | \r | |
104 | /**\r | |
105 | Reads a 16-bit I/O port.\r | |
106 | \r | |
107 | Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.\r | |
108 | This function must guarantee that all I/O read and write operations are\r | |
109 | serialized.\r | |
110 | \r | |
111 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
112 | \r | |
113 | @param Port The I/O port to read.\r | |
114 | \r | |
115 | @return The value read.\r | |
116 | \r | |
117 | **/\r | |
118 | UINT16\r | |
119 | EFIAPI\r | |
120 | IoRead16 (\r | |
121 | IN UINTN Port\r | |
122 | )\r | |
123 | {\r | |
124 | ASSERT ((Port & 1) == 0);\r | |
2ce31132 | 125 | _ReadWriteBarrier ();\r |
878ddf1f | 126 | return _inpw((UINT16)Port);\r |
127 | }\r | |
128 | \r | |
129 | /**\r | |
130 | Writes a 16-bit I/O port.\r | |
131 | \r | |
132 | Writes the 16-bit I/O port specified by Port with the value specified by Value\r | |
133 | and returns Value. This function must guarantee that all I/O read and write\r | |
134 | operations are serialized.\r | |
135 | \r | |
136 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
137 | \r | |
138 | @param Port The I/O port to write.\r | |
139 | @param Value The value to write to the I/O port.\r | |
140 | \r | |
141 | @return The value written the I/O port.\r | |
142 | \r | |
143 | **/\r | |
144 | UINT16\r | |
145 | EFIAPI\r | |
146 | IoWrite16 (\r | |
147 | IN UINTN Port,\r | |
148 | IN UINT16 Value\r | |
149 | )\r | |
150 | {\r | |
151 | ASSERT ((Port & 1) == 0);\r | |
2ce31132 | 152 | _ReadWriteBarrier ();\r |
878ddf1f | 153 | return _outpw ((UINT16)Port, Value);\r |
154 | }\r | |
155 | \r | |
156 | /**\r | |
157 | Reads a 32-bit I/O port.\r | |
158 | \r | |
159 | Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.\r | |
160 | This function must guarantee that all I/O read and write operations are\r | |
161 | serialized.\r | |
162 | \r | |
163 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
164 | \r | |
165 | @param Port The I/O port to read.\r | |
166 | \r | |
167 | @return The value read.\r | |
168 | \r | |
169 | **/\r | |
170 | UINT32\r | |
171 | EFIAPI\r | |
172 | IoRead32 (\r | |
173 | IN UINTN Port\r | |
174 | )\r | |
175 | {\r | |
176 | ASSERT ((Port & 3) == 0);\r | |
2ce31132 | 177 | _ReadWriteBarrier ();\r |
878ddf1f | 178 | return _inpd((UINT16)Port);\r |
179 | }\r | |
180 | \r | |
181 | /**\r | |
182 | Writes a 32-bit I/O port.\r | |
183 | \r | |
184 | Writes the 32-bit I/O port specified by Port with the value specified by Value\r | |
185 | and returns Value. This function must guarantee that all I/O read and write\r | |
186 | operations are serialized.\r | |
187 | \r | |
188 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
189 | \r | |
190 | @param Port The I/O port to write.\r | |
191 | @param Value The value to write to the I/O port.\r | |
192 | \r | |
193 | @return The value written the I/O port.\r | |
194 | \r | |
195 | **/\r | |
196 | UINT32\r | |
197 | EFIAPI\r | |
198 | IoWrite32 (\r | |
199 | IN UINTN Port,\r | |
200 | IN UINT32 Value\r | |
201 | )\r | |
202 | {\r | |
203 | ASSERT ((Port & 3) == 0);\r | |
2ce31132 | 204 | _ReadWriteBarrier ();\r |
878ddf1f | 205 | return _outpd ((UINT16)Port, Value);\r |
206 | }\r | |
207 | \r | |
2ce31132 | 208 | \r |
209 | /**\r | |
210 | Reads an 8-bit MMIO register.\r | |
211 | \r | |
212 | Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r | |
213 | returned. This function must guarantee that all MMIO read and write\r | |
214 | operations are serialized.\r | |
215 | \r | |
216 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
217 | \r | |
218 | @param Address The MMIO register to read.\r | |
219 | \r | |
220 | @return The value read.\r | |
221 | \r | |
222 | **/\r | |
223 | UINT8\r | |
224 | EFIAPI\r | |
225 | MmioRead8 (\r | |
226 | IN UINTN Address\r | |
227 | )\r | |
228 | {\r | |
229 | _ReadWriteBarrier ();\r | |
230 | return *(volatile UINT8 *)Address;\r | |
231 | }\r | |
232 | \r | |
233 | /**\r | |
234 | Writes an 8-bit MMIO register.\r | |
235 | \r | |
236 | Writes the 8-bit MMIO register specified by Address with the value specified\r | |
237 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
238 | and write operations are serialized.\r | |
239 | \r | |
240 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
241 | \r | |
242 | @param Address The MMIO register to write.\r | |
243 | @param Value The value to write to the MMIO register.\r | |
244 | \r | |
245 | **/\r | |
246 | UINT8\r | |
247 | EFIAPI\r | |
248 | MmioWrite8 (\r | |
249 | IN UINTN Address,\r | |
250 | IN UINT8 Value\r | |
251 | )\r | |
252 | {\r | |
253 | _ReadWriteBarrier ();\r | |
254 | return *(volatile UINT8 *)Address = Value;\r | |
255 | }\r | |
256 | \r | |
257 | /**\r | |
258 | Reads a 16-bit MMIO register.\r | |
259 | \r | |
260 | Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r | |
261 | returned. This function must guarantee that all MMIO read and write\r | |
262 | operations are serialized.\r | |
263 | \r | |
264 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
265 | \r | |
266 | @param Address The MMIO register to read.\r | |
267 | \r | |
268 | @return The value read.\r | |
269 | \r | |
270 | **/\r | |
271 | UINT16\r | |
272 | EFIAPI\r | |
273 | MmioRead16 (\r | |
274 | IN UINTN Address\r | |
275 | )\r | |
276 | {\r | |
277 | ASSERT ((Address & 1) == 0);\r | |
278 | _ReadWriteBarrier ();\r | |
279 | return *(volatile UINT16 *)Address;\r | |
280 | }\r | |
281 | \r | |
282 | /**\r | |
283 | Writes a 16-bit MMIO register.\r | |
284 | \r | |
285 | Writes the 16-bit MMIO register specified by Address with the value specified\r | |
286 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
287 | and write operations are serialized.\r | |
288 | \r | |
289 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
290 | \r | |
291 | @param Address The MMIO register to write.\r | |
292 | @param Value The value to write to the MMIO register.\r | |
293 | \r | |
294 | **/\r | |
295 | UINT16\r | |
296 | EFIAPI\r | |
297 | MmioWrite16 (\r | |
298 | IN UINTN Address,\r | |
299 | IN UINT16 Value\r | |
300 | )\r | |
301 | {\r | |
302 | ASSERT ((Address & 1) == 0);\r | |
303 | _ReadWriteBarrier ();\r | |
304 | return *(volatile UINT16 *)Address = Value;\r | |
305 | }\r | |
306 | \r | |
307 | /**\r | |
308 | Reads a 32-bit MMIO register.\r | |
309 | \r | |
310 | Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r | |
311 | returned. This function must guarantee that all MMIO read and write\r | |
312 | operations are serialized.\r | |
313 | \r | |
314 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
315 | \r | |
316 | @param Address The MMIO register to read.\r | |
317 | \r | |
318 | @return The value read.\r | |
319 | \r | |
320 | **/\r | |
321 | UINT32\r | |
322 | EFIAPI\r | |
323 | MmioRead32 (\r | |
324 | IN UINTN Address\r | |
325 | )\r | |
326 | {\r | |
327 | ASSERT ((Address & 3) == 0);\r | |
328 | _ReadWriteBarrier ();\r | |
329 | return *(volatile UINT32 *)Address;\r | |
330 | }\r | |
331 | \r | |
332 | /**\r | |
333 | Writes a 32-bit MMIO register.\r | |
334 | \r | |
335 | Writes the 32-bit MMIO register specified by Address with the value specified\r | |
336 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
337 | and write operations are serialized.\r | |
338 | \r | |
339 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
340 | \r | |
341 | @param Address The MMIO register to write.\r | |
342 | @param Value The value to write to the MMIO register.\r | |
343 | \r | |
344 | **/\r | |
345 | UINT32\r | |
346 | EFIAPI\r | |
347 | MmioWrite32 (\r | |
348 | IN UINTN Address,\r | |
349 | IN UINT32 Value\r | |
350 | )\r | |
351 | {\r | |
352 | ASSERT ((Address & 3) == 0);\r | |
353 | _ReadWriteBarrier ();\r | |
354 | return *(volatile UINT32 *)Address = Value;\r | |
355 | }\r | |
356 | \r | |
357 | /**\r | |
358 | Reads a 64-bit MMIO register.\r | |
359 | \r | |
360 | Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r | |
361 | returned. This function must guarantee that all MMIO read and write\r | |
362 | operations are serialized.\r | |
363 | \r | |
364 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
365 | \r | |
366 | @param Address The MMIO register to read.\r | |
367 | \r | |
368 | @return The value read.\r | |
369 | \r | |
370 | **/\r | |
371 | UINT64\r | |
372 | EFIAPI\r | |
373 | MmioRead64 (\r | |
374 | IN UINTN Address\r | |
375 | )\r | |
376 | {\r | |
377 | ASSERT ((Address & 7) == 0);\r | |
378 | _ReadWriteBarrier ();\r | |
379 | return *(volatile UINT64 *)Address;\r | |
380 | }\r | |
381 | \r | |
382 | /**\r | |
383 | Writes a 64-bit MMIO register.\r | |
384 | \r | |
385 | Writes the 64-bit MMIO register specified by Address with the value specified\r | |
386 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
387 | and write operations are serialized.\r | |
388 | \r | |
389 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
390 | \r | |
391 | @param Address The MMIO register to write.\r | |
392 | @param Value The value to write to the MMIO register.\r | |
393 | \r | |
394 | **/\r | |
395 | UINT64\r | |
396 | EFIAPI\r | |
397 | MmioWrite64 (\r | |
398 | IN UINTN Address,\r | |
399 | IN UINT64 Value\r | |
400 | )\r | |
401 | {\r | |
402 | ASSERT ((Address & 7) == 0);\r | |
403 | _ReadWriteBarrier ();\r | |
404 | return *(volatile UINT64 *)Address = Value;\r | |
405 | }\r | |
406 | \r | |
878ddf1f | 407 | #endif\r |