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Commit | Line | Data |
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e1f414b6 | 1 | /** @file\r |
2 | Common I/O Library routines.\r | |
3 | \r | |
38c8be12 | 4 | Copyright (c) 2006 - 2021, Intel Corporation. All rights reserved.<BR>\r |
9344f092 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
e1f414b6 | 6 | \r |
e1f414b6 | 7 | **/\r |
8 | \r | |
f734a10a | 9 | #include "BaseIoLibIntrinsicInternal.h"\r |
b6b2de88 | 10 | #include "IoLibTdx.h"\r |
e1f414b6 | 11 | \r |
12 | /**\r | |
13 | Reads a 64-bit I/O port.\r | |
14 | \r | |
15 | Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.\r | |
16 | This function must guarantee that all I/O read and write operations are\r | |
17 | serialized.\r | |
18 | \r | |
19 | If 64-bit I/O port operations are not supported, then ASSERT().\r | |
2281e7a9 | 20 | If Port is not aligned on a 64-bit boundary, then ASSERT().\r |
e1f414b6 | 21 | \r |
22 | @param Port The I/O port to read.\r | |
23 | \r | |
2281e7a9 | 24 | @return The value read.\r |
e1f414b6 | 25 | \r |
26 | **/\r | |
27 | UINT64\r | |
28 | EFIAPI\r | |
29 | IoRead64 (\r | |
2f88bd3a | 30 | IN UINTN Port\r |
e1f414b6 | 31 | )\r |
32 | {\r | |
33 | ASSERT (FALSE);\r | |
34 | return 0;\r | |
35 | }\r | |
36 | \r | |
37 | /**\r | |
38 | Writes a 64-bit I/O port.\r | |
39 | \r | |
40 | Writes the 64-bit I/O port specified by Port with the value specified by Value\r | |
41 | and returns Value. This function must guarantee that all I/O read and write\r | |
42 | operations are serialized.\r | |
43 | \r | |
44 | If 64-bit I/O port operations are not supported, then ASSERT().\r | |
2281e7a9 | 45 | If Port is not aligned on a 64-bit boundary, then ASSERT().\r |
e1f414b6 | 46 | \r |
47 | @param Port The I/O port to write.\r | |
48 | @param Value The value to write to the I/O port.\r | |
49 | \r | |
2281e7a9 | 50 | @return The value written the I/O port.\r |
e1f414b6 | 51 | \r |
52 | **/\r | |
53 | UINT64\r | |
54 | EFIAPI\r | |
55 | IoWrite64 (\r | |
2f88bd3a MK |
56 | IN UINTN Port,\r |
57 | IN UINT64 Value\r | |
e1f414b6 | 58 | )\r |
59 | {\r | |
60 | ASSERT (FALSE);\r | |
61 | return 0;\r | |
62 | }\r | |
63 | \r | |
9de780dc LG |
64 | /**\r |
65 | Reads an 8-bit MMIO register.\r | |
66 | \r | |
67 | Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r | |
68 | returned. This function must guarantee that all MMIO read and write\r | |
69 | operations are serialized.\r | |
70 | \r | |
71 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
72 | \r | |
b6b2de88 MX |
73 | For Td guest TDVMCALL_MMIO is invoked to read MMIO registers.\r |
74 | \r | |
9de780dc LG |
75 | @param Address The MMIO register to read.\r |
76 | \r | |
77 | @return The value read.\r | |
78 | \r | |
79 | **/\r | |
80 | UINT8\r | |
81 | EFIAPI\r | |
82 | MmioRead8 (\r | |
2f88bd3a | 83 | IN UINTN Address\r |
9de780dc LG |
84 | )\r |
85 | {\r | |
2f88bd3a MK |
86 | UINT8 Value;\r |
87 | BOOLEAN Flag;\r | |
9de780dc | 88 | \r |
38c8be12 DB |
89 | Flag = FilterBeforeMmIoRead (FilterWidth8, Address, &Value);\r |
90 | if (Flag) {\r | |
91 | MemoryFence ();\r | |
b6b2de88 MX |
92 | \r |
93 | if (IsTdxGuest ()) {\r | |
94 | Value = TdMmioRead8 (Address);\r | |
95 | } else {\r | |
96 | Value = *(volatile UINT8 *)Address;\r | |
97 | }\r | |
98 | \r | |
38c8be12 DB |
99 | MemoryFence ();\r |
100 | }\r | |
2f88bd3a | 101 | \r |
38c8be12 | 102 | FilterAfterMmIoRead (FilterWidth8, Address, &Value);\r |
9de780dc LG |
103 | \r |
104 | return Value;\r | |
105 | }\r | |
106 | \r | |
107 | /**\r | |
108 | Writes an 8-bit MMIO register.\r | |
109 | \r | |
110 | Writes the 8-bit MMIO register specified by Address with the value specified\r | |
111 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
112 | and write operations are serialized.\r | |
113 | \r | |
114 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
115 | \r | |
b6b2de88 MX |
116 | For Td guest TDVMCALL_MMIO is invoked to write MMIO registers.\r |
117 | \r | |
9de780dc LG |
118 | @param Address The MMIO register to write.\r |
119 | @param Value The value to write to the MMIO register.\r | |
9095d37b | 120 | \r |
9de780dc LG |
121 | @return Value.\r |
122 | \r | |
123 | **/\r | |
124 | UINT8\r | |
125 | EFIAPI\r | |
126 | MmioWrite8 (\r | |
2f88bd3a MK |
127 | IN UINTN Address,\r |
128 | IN UINT8 Value\r | |
9de780dc LG |
129 | )\r |
130 | {\r | |
2f88bd3a | 131 | BOOLEAN Flag;\r |
38c8be12 DB |
132 | \r |
133 | Flag = FilterBeforeMmIoWrite (FilterWidth8, Address, &Value);\r | |
134 | if (Flag) {\r | |
135 | MemoryFence ();\r | |
b6b2de88 MX |
136 | \r |
137 | if (IsTdxGuest ()) {\r | |
138 | TdMmioWrite8 (Address, Value);\r | |
139 | } else {\r | |
140 | *(volatile UINT8 *)Address = Value;\r | |
141 | }\r | |
142 | \r | |
38c8be12 DB |
143 | MemoryFence ();\r |
144 | }\r | |
2f88bd3a | 145 | \r |
38c8be12 | 146 | FilterAfterMmIoWrite (FilterWidth8, Address, &Value);\r |
9de780dc LG |
147 | \r |
148 | return Value;\r | |
149 | }\r | |
150 | \r | |
151 | /**\r | |
152 | Reads a 16-bit MMIO register.\r | |
153 | \r | |
154 | Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r | |
155 | returned. This function must guarantee that all MMIO read and write\r | |
156 | operations are serialized.\r | |
157 | \r | |
158 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
159 | If Address is not aligned on a 16-bit boundary, then ASSERT().\r | |
160 | \r | |
b6b2de88 MX |
161 | For Td guest TDVMCALL_MMIO is invoked to read MMIO registers.\r |
162 | \r | |
9de780dc LG |
163 | @param Address The MMIO register to read.\r |
164 | \r | |
165 | @return The value read.\r | |
166 | \r | |
167 | **/\r | |
168 | UINT16\r | |
169 | EFIAPI\r | |
170 | MmioRead16 (\r | |
2f88bd3a | 171 | IN UINTN Address\r |
9de780dc LG |
172 | )\r |
173 | {\r | |
2f88bd3a MK |
174 | UINT16 Value;\r |
175 | BOOLEAN Flag;\r | |
9de780dc LG |
176 | \r |
177 | ASSERT ((Address & 1) == 0);\r | |
38c8be12 DB |
178 | Flag = FilterBeforeMmIoRead (FilterWidth16, Address, &Value);\r |
179 | if (Flag) {\r | |
180 | MemoryFence ();\r | |
b6b2de88 MX |
181 | \r |
182 | if (IsTdxGuest ()) {\r | |
183 | Value = TdMmioRead16 (Address);\r | |
184 | } else {\r | |
185 | Value = *(volatile UINT16 *)Address;\r | |
186 | }\r | |
187 | \r | |
38c8be12 DB |
188 | MemoryFence ();\r |
189 | }\r | |
2f88bd3a | 190 | \r |
38c8be12 | 191 | FilterAfterMmIoRead (FilterWidth16, Address, &Value);\r |
9de780dc LG |
192 | \r |
193 | return Value;\r | |
194 | }\r | |
195 | \r | |
196 | /**\r | |
197 | Writes a 16-bit MMIO register.\r | |
198 | \r | |
199 | Writes the 16-bit MMIO register specified by Address with the value specified\r | |
200 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
201 | and write operations are serialized.\r | |
202 | \r | |
203 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
204 | If Address is not aligned on a 16-bit boundary, then ASSERT().\r | |
205 | \r | |
b6b2de88 MX |
206 | For Td guest TDVMCALL_MMIO is invoked to write MMIO registers.\r |
207 | \r | |
9de780dc LG |
208 | @param Address The MMIO register to write.\r |
209 | @param Value The value to write to the MMIO register.\r | |
9095d37b | 210 | \r |
9de780dc LG |
211 | @return Value.\r |
212 | \r | |
213 | **/\r | |
214 | UINT16\r | |
215 | EFIAPI\r | |
216 | MmioWrite16 (\r | |
2f88bd3a MK |
217 | IN UINTN Address,\r |
218 | IN UINT16 Value\r | |
9de780dc LG |
219 | )\r |
220 | {\r | |
2f88bd3a | 221 | BOOLEAN Flag;\r |
38c8be12 | 222 | \r |
9de780dc LG |
223 | ASSERT ((Address & 1) == 0);\r |
224 | \r | |
38c8be12 DB |
225 | Flag = FilterBeforeMmIoWrite (FilterWidth16, Address, &Value);\r |
226 | if (Flag) {\r | |
227 | MemoryFence ();\r | |
b6b2de88 MX |
228 | \r |
229 | if (IsTdxGuest ()) {\r | |
230 | TdMmioWrite16 (Address, Value);\r | |
231 | } else {\r | |
232 | *(volatile UINT16 *)Address = Value;\r | |
233 | }\r | |
234 | \r | |
38c8be12 DB |
235 | MemoryFence ();\r |
236 | }\r | |
2f88bd3a | 237 | \r |
38c8be12 | 238 | FilterAfterMmIoWrite (FilterWidth16, Address, &Value);\r |
9095d37b | 239 | \r |
9de780dc LG |
240 | return Value;\r |
241 | }\r | |
242 | \r | |
243 | /**\r | |
244 | Reads a 32-bit MMIO register.\r | |
245 | \r | |
246 | Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r | |
247 | returned. This function must guarantee that all MMIO read and write\r | |
248 | operations are serialized.\r | |
249 | \r | |
250 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
251 | If Address is not aligned on a 32-bit boundary, then ASSERT().\r | |
252 | \r | |
b6b2de88 MX |
253 | For Td guest TDVMCALL_MMIO is invoked to read MMIO registers.\r |
254 | \r | |
9de780dc LG |
255 | @param Address The MMIO register to read.\r |
256 | \r | |
257 | @return The value read.\r | |
258 | \r | |
259 | **/\r | |
260 | UINT32\r | |
261 | EFIAPI\r | |
262 | MmioRead32 (\r | |
2f88bd3a | 263 | IN UINTN Address\r |
9de780dc LG |
264 | )\r |
265 | {\r | |
2f88bd3a MK |
266 | UINT32 Value;\r |
267 | BOOLEAN Flag;\r | |
9de780dc LG |
268 | \r |
269 | ASSERT ((Address & 3) == 0);\r | |
9095d37b | 270 | \r |
38c8be12 DB |
271 | Flag = FilterBeforeMmIoRead (FilterWidth32, Address, &Value);\r |
272 | if (Flag) {\r | |
273 | MemoryFence ();\r | |
b6b2de88 MX |
274 | \r |
275 | if (IsTdxGuest ()) {\r | |
276 | Value = TdMmioRead32 (Address);\r | |
277 | } else {\r | |
278 | Value = *(volatile UINT32 *)Address;\r | |
279 | }\r | |
280 | \r | |
38c8be12 DB |
281 | MemoryFence ();\r |
282 | }\r | |
2f88bd3a | 283 | \r |
38c8be12 | 284 | FilterAfterMmIoRead (FilterWidth32, Address, &Value);\r |
9095d37b | 285 | \r |
9de780dc LG |
286 | return Value;\r |
287 | }\r | |
288 | \r | |
289 | /**\r | |
290 | Writes a 32-bit MMIO register.\r | |
291 | \r | |
292 | Writes the 32-bit MMIO register specified by Address with the value specified\r | |
293 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
294 | and write operations are serialized.\r | |
295 | \r | |
296 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
297 | If Address is not aligned on a 32-bit boundary, then ASSERT().\r | |
298 | \r | |
b6b2de88 MX |
299 | For Td guest TDVMCALL_MMIO is invoked to write MMIO registers.\r |
300 | \r | |
9de780dc LG |
301 | @param Address The MMIO register to write.\r |
302 | @param Value The value to write to the MMIO register.\r | |
9095d37b | 303 | \r |
9de780dc LG |
304 | @return Value.\r |
305 | \r | |
306 | **/\r | |
307 | UINT32\r | |
308 | EFIAPI\r | |
309 | MmioWrite32 (\r | |
2f88bd3a MK |
310 | IN UINTN Address,\r |
311 | IN UINT32 Value\r | |
9de780dc LG |
312 | )\r |
313 | {\r | |
2f88bd3a | 314 | BOOLEAN Flag;\r |
38c8be12 | 315 | \r |
9de780dc | 316 | ASSERT ((Address & 3) == 0);\r |
9095d37b | 317 | \r |
38c8be12 DB |
318 | Flag = FilterBeforeMmIoWrite (FilterWidth32, Address, &Value);\r |
319 | if (Flag) {\r | |
320 | MemoryFence ();\r | |
b6b2de88 MX |
321 | \r |
322 | if (IsTdxGuest ()) {\r | |
323 | TdMmioWrite32 (Address, Value);\r | |
324 | } else {\r | |
325 | *(volatile UINT32 *)Address = Value;\r | |
326 | }\r | |
327 | \r | |
38c8be12 DB |
328 | MemoryFence ();\r |
329 | }\r | |
2f88bd3a | 330 | \r |
38c8be12 | 331 | FilterAfterMmIoWrite (FilterWidth32, Address, &Value);\r |
9095d37b | 332 | \r |
9de780dc LG |
333 | return Value;\r |
334 | }\r | |
335 | \r | |
336 | /**\r | |
337 | Reads a 64-bit MMIO register.\r | |
338 | \r | |
339 | Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r | |
340 | returned. This function must guarantee that all MMIO read and write\r | |
341 | operations are serialized.\r | |
342 | \r | |
343 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
344 | If Address is not aligned on a 64-bit boundary, then ASSERT().\r | |
345 | \r | |
b6b2de88 MX |
346 | For Td guest TDVMCALL_MMIO is invoked to read MMIO registers.\r |
347 | \r | |
9de780dc LG |
348 | @param Address The MMIO register to read.\r |
349 | \r | |
350 | @return The value read.\r | |
351 | \r | |
352 | **/\r | |
353 | UINT64\r | |
354 | EFIAPI\r | |
355 | MmioRead64 (\r | |
2f88bd3a | 356 | IN UINTN Address\r |
9de780dc LG |
357 | )\r |
358 | {\r | |
2f88bd3a MK |
359 | UINT64 Value;\r |
360 | BOOLEAN Flag;\r | |
9de780dc LG |
361 | \r |
362 | ASSERT ((Address & 7) == 0);\r | |
9095d37b | 363 | \r |
38c8be12 DB |
364 | Flag = FilterBeforeMmIoRead (FilterWidth64, Address, &Value);\r |
365 | if (Flag) {\r | |
366 | MemoryFence ();\r | |
b6b2de88 MX |
367 | \r |
368 | if (IsTdxGuest ()) {\r | |
369 | Value = TdMmioRead64 (Address);\r | |
370 | } else {\r | |
371 | Value = *(volatile UINT64 *)Address;\r | |
372 | }\r | |
373 | \r | |
38c8be12 DB |
374 | MemoryFence ();\r |
375 | }\r | |
2f88bd3a | 376 | \r |
38c8be12 | 377 | FilterAfterMmIoRead (FilterWidth64, Address, &Value);\r |
9de780dc LG |
378 | \r |
379 | return Value;\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 | If Address is not aligned on a 64-bit boundary, then ASSERT().\r | |
391 | \r | |
b6b2de88 MX |
392 | For Td guest TDVMCALL_MMIO is invoked to write MMIO registers.\r |
393 | \r | |
9de780dc LG |
394 | @param Address The MMIO register to write.\r |
395 | @param Value The value to write to the MMIO register.\r | |
396 | \r | |
397 | **/\r | |
398 | UINT64\r | |
399 | EFIAPI\r | |
400 | MmioWrite64 (\r | |
2f88bd3a MK |
401 | IN UINTN Address,\r |
402 | IN UINT64 Value\r | |
9de780dc LG |
403 | )\r |
404 | {\r | |
2f88bd3a | 405 | BOOLEAN Flag;\r |
38c8be12 | 406 | \r |
9de780dc | 407 | ASSERT ((Address & 7) == 0);\r |
9095d37b | 408 | \r |
38c8be12 DB |
409 | Flag = FilterBeforeMmIoWrite (FilterWidth64, Address, &Value);\r |
410 | if (Flag) {\r | |
411 | MemoryFence ();\r | |
b6b2de88 MX |
412 | \r |
413 | if (IsTdxGuest ()) {\r | |
414 | TdMmioWrite64 (Address, Value);\r | |
415 | } else {\r | |
416 | *(volatile UINT64 *)Address = Value;\r | |
417 | }\r | |
418 | \r | |
38c8be12 DB |
419 | MemoryFence ();\r |
420 | }\r | |
2f88bd3a | 421 | \r |
38c8be12 | 422 | FilterAfterMmIoWrite (FilterWidth64, Address, &Value);\r |
9095d37b | 423 | \r |
9de780dc LG |
424 | return Value;\r |
425 | }\r |