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64698eb8 | 1 | /** @file |
2 | GCC inline implementation of BaseLib processor specific functions. | |
3 | ||
4 | Copyright (c) 2006 - 2007, Intel Corporation<BR> | |
5 | Portions copyright (c) 2008-2009 Apple Inc.<BR> | |
6 | All rights reserved. This program and the accompanying materials | |
7 | are licensed and made available under the terms and conditions of the BSD License | |
8 | which accompanies this distribution. The full text of the license may be found at | |
9 | http://opensource.org/licenses/bsd-license.php | |
10 | ||
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
13 | ||
14 | **/ | |
15 | ||
16 | ||
17 | #include "BaseLibInternals.h" | |
18 | ||
19 | ||
20 | ||
21 | /** | |
22 | Used to serialize load and store operations. | |
23 | ||
24 | All loads and stores that proceed calls to this function are guaranteed to be | |
25 | globally visible when this function returns. | |
26 | ||
27 | **/ | |
28 | VOID | |
29 | EFIAPI | |
30 | MemoryFence ( | |
31 | VOID | |
32 | ) | |
33 | { | |
34 | // This is a little bit of overkill and it is more about the compiler that it is | |
35 | // actually processor syncronization. This is like the _ReadWriteBarrier | |
36 | // Microsft specific intrinsic | |
37 | __asm__ __volatile__ ("":::"memory"); | |
38 | } | |
39 | ||
40 | ||
41 | /** | |
42 | Enables CPU interrupts. | |
43 | ||
44 | Enables CPU interrupts. | |
45 | ||
46 | **/ | |
47 | VOID | |
48 | EFIAPI | |
49 | EnableInterrupts ( | |
50 | VOID | |
51 | ) | |
52 | { | |
53 | __asm__ __volatile__ ("sti"::: "memory"); | |
54 | } | |
55 | ||
56 | ||
57 | /** | |
58 | Disables CPU interrupts. | |
59 | ||
60 | Disables CPU interrupts. | |
61 | ||
62 | **/ | |
63 | VOID | |
64 | EFIAPI | |
65 | DisableInterrupts ( | |
66 | VOID | |
67 | ) | |
68 | { | |
69 | __asm__ __volatile__ ("cli"::: "memory"); | |
70 | } | |
71 | ||
72 | ||
73 | ||
74 | ||
75 | /** | |
76 | Requests CPU to pause for a short period of time. | |
77 | ||
78 | Requests CPU to pause for a short period of time. Typically used in MP | |
79 | systems to prevent memory starvation while waiting for a spin lock. | |
80 | ||
81 | **/ | |
82 | VOID | |
83 | EFIAPI | |
84 | CpuPause ( | |
85 | VOID | |
86 | ) | |
87 | { | |
88 | __asm__ __volatile__ ("pause"); | |
89 | } | |
90 | ||
91 | ||
92 | /** | |
93 | Generates a breakpoint on the CPU. | |
94 | ||
95 | Generates a breakpoint on the CPU. The breakpoint must be implemented such | |
96 | that code can resume normal execution after the breakpoint. | |
97 | ||
98 | **/ | |
99 | VOID | |
100 | EFIAPI | |
101 | CpuBreakpoint ( | |
102 | VOID | |
103 | ) | |
104 | { | |
105 | __asm__ __volatile__ ("int $3"); | |
106 | } | |
107 | ||
108 | ||
109 | ||
110 | /** | |
111 | Returns a 64-bit Machine Specific Register(MSR). | |
112 | ||
113 | Reads and returns the 64-bit MSR specified by Index. No parameter checking is | |
114 | performed on Index, and some Index values may cause CPU exceptions. The | |
115 | caller must either guarantee that Index is valid, or the caller must set up | |
116 | exception handlers to catch the exceptions. This function is only available | |
117 | on IA-32 and X64. | |
118 | ||
119 | @param Index The 32-bit MSR index to read. | |
120 | ||
121 | @return The value of the MSR identified by Index. | |
122 | ||
123 | **/ | |
124 | UINT64 | |
125 | EFIAPI | |
126 | AsmReadMsr64 ( | |
127 | IN UINT32 Index | |
128 | ) | |
129 | { | |
130 | UINT64 Data; | |
131 | ||
132 | __asm__ __volatile__ ( | |
133 | "rdmsr" | |
134 | : "=A" (Data) // %0 | |
135 | : "c" (Index) // %1 | |
136 | ); | |
137 | ||
138 | return Data; | |
139 | } | |
140 | ||
141 | /** | |
142 | Writes a 64-bit value to a Machine Specific Register(MSR), and returns the | |
143 | value. | |
144 | ||
145 | Writes the 64-bit value specified by Value to the MSR specified by Index. The | |
146 | 64-bit value written to the MSR is returned. No parameter checking is | |
147 | performed on Index or Value, and some of these may cause CPU exceptions. The | |
148 | caller must either guarantee that Index and Value are valid, or the caller | |
149 | must establish proper exception handlers. This function is only available on | |
150 | IA-32 and X64. | |
151 | ||
152 | @param Index The 32-bit MSR index to write. | |
153 | @param Value The 64-bit value to write to the MSR. | |
154 | ||
155 | @return Value | |
156 | ||
157 | **/ | |
158 | UINT64 | |
159 | EFIAPI | |
160 | AsmWriteMsr64 ( | |
161 | IN UINT32 Index, | |
162 | IN UINT64 Value | |
163 | ) | |
164 | { | |
165 | __asm__ __volatile__ ( | |
166 | "wrmsr" | |
167 | : | |
168 | : "c" (Index), | |
169 | "A" (Value) | |
170 | ); | |
171 | ||
172 | return Value; | |
173 | } | |
174 | ||
175 | ||
176 | ||
177 | /** | |
178 | Reads the current value of the EFLAGS register. | |
179 | ||
180 | Reads and returns the current value of the EFLAGS register. This function is | |
181 | only available on IA-32 and X64. This returns a 32-bit value on IA-32 and a | |
182 | 64-bit value on X64. | |
183 | ||
184 | @return EFLAGS on IA-32 or RFLAGS on X64. | |
185 | ||
186 | **/ | |
187 | UINTN | |
188 | EFIAPI | |
189 | AsmReadEflags ( | |
190 | VOID | |
191 | ) | |
192 | { | |
193 | UINTN Eflags; | |
194 | ||
195 | __asm__ __volatile__ ( | |
196 | "pushfl \n\t" | |
197 | "popl %0 " | |
198 | : "=r" (Eflags) | |
199 | ); | |
200 | ||
201 | return Eflags; | |
202 | } | |
203 | ||
204 | ||
205 | ||
206 | /** | |
207 | Reads the current value of the Control Register 0 (CR0). | |
208 | ||
209 | Reads and returns the current value of CR0. This function is only available | |
210 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
211 | X64. | |
212 | ||
213 | @return The value of the Control Register 0 (CR0). | |
214 | ||
215 | **/ | |
216 | UINTN | |
217 | EFIAPI | |
218 | AsmReadCr0 ( | |
219 | VOID | |
220 | ) | |
221 | { | |
222 | UINTN Data; | |
223 | ||
224 | __asm__ __volatile__ ( | |
225 | "movl %%cr0,%0" | |
226 | : "=a" (Data) | |
227 | ); | |
228 | ||
229 | return Data; | |
230 | } | |
231 | ||
232 | ||
233 | /** | |
234 | Reads the current value of the Control Register 2 (CR2). | |
235 | ||
236 | Reads and returns the current value of CR2. This function is only available | |
237 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
238 | X64. | |
239 | ||
240 | @return The value of the Control Register 2 (CR2). | |
241 | ||
242 | **/ | |
243 | UINTN | |
244 | EFIAPI | |
245 | AsmReadCr2 ( | |
246 | VOID | |
247 | ) | |
248 | { | |
249 | UINTN Data; | |
250 | ||
251 | __asm__ __volatile__ ( | |
252 | "movl %%cr2, %0" | |
253 | : "=r" (Data) | |
254 | ); | |
255 | ||
256 | return Data; | |
257 | } | |
258 | ||
259 | /** | |
260 | Reads the current value of the Control Register 3 (CR3). | |
261 | ||
262 | Reads and returns the current value of CR3. This function is only available | |
263 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
264 | X64. | |
265 | ||
266 | @return The value of the Control Register 3 (CR3). | |
267 | ||
268 | **/ | |
269 | UINTN | |
270 | EFIAPI | |
271 | AsmReadCr3 ( | |
272 | VOID | |
273 | ) | |
274 | { | |
275 | UINTN Data; | |
276 | ||
277 | __asm__ __volatile__ ( | |
278 | "movl %%cr3, %0" | |
279 | : "=r" (Data) | |
280 | ); | |
281 | ||
282 | return Data; | |
283 | } | |
284 | ||
285 | ||
286 | /** | |
287 | Reads the current value of the Control Register 4 (CR4). | |
288 | ||
289 | Reads and returns the current value of CR4. This function is only available | |
290 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
291 | X64. | |
292 | ||
293 | @return The value of the Control Register 4 (CR4). | |
294 | ||
295 | **/ | |
296 | UINTN | |
297 | EFIAPI | |
298 | AsmReadCr4 ( | |
299 | VOID | |
300 | ) | |
301 | { | |
302 | UINTN Data; | |
303 | ||
304 | __asm__ __volatile__ ( | |
305 | "movl %%cr4, %0" | |
306 | : "=a" (Data) | |
307 | ); | |
308 | ||
309 | return Data; | |
310 | } | |
311 | ||
312 | ||
313 | /** | |
314 | Writes a value to Control Register 0 (CR0). | |
315 | ||
316 | Writes and returns a new value to CR0. This function is only available on | |
317 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
318 | ||
319 | @param Cr0 The value to write to CR0. | |
320 | ||
321 | @return The value written to CR0. | |
322 | ||
323 | **/ | |
324 | UINTN | |
325 | EFIAPI | |
326 | AsmWriteCr0 ( | |
327 | UINTN Cr0 | |
328 | ) | |
329 | { | |
330 | __asm__ __volatile__ ( | |
331 | "movl %0, %%cr0" | |
332 | : | |
333 | : "r" (Cr0) | |
334 | ); | |
335 | return Cr0; | |
336 | } | |
337 | ||
338 | ||
339 | /** | |
340 | Writes a value to Control Register 2 (CR2). | |
341 | ||
342 | Writes and returns a new value to CR2. This function is only available on | |
343 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
344 | ||
345 | @param Cr2 The value to write to CR2. | |
346 | ||
347 | @return The value written to CR2. | |
348 | ||
349 | **/ | |
350 | UINTN | |
351 | EFIAPI | |
352 | AsmWriteCr2 ( | |
353 | UINTN Cr2 | |
354 | ) | |
355 | { | |
356 | __asm__ __volatile__ ( | |
357 | "movl %0, %%cr2" | |
358 | : | |
359 | : "r" (Cr2) | |
360 | ); | |
361 | return Cr2; | |
362 | } | |
363 | ||
364 | ||
365 | /** | |
366 | Writes a value to Control Register 3 (CR3). | |
367 | ||
368 | Writes and returns a new value to CR3. This function is only available on | |
369 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
370 | ||
371 | @param Cr3 The value to write to CR3. | |
372 | ||
373 | @return The value written to CR3. | |
374 | ||
375 | **/ | |
376 | UINTN | |
377 | EFIAPI | |
378 | AsmWriteCr3 ( | |
379 | UINTN Cr3 | |
380 | ) | |
381 | { | |
382 | __asm__ __volatile__ ( | |
383 | "movl %0, %%cr3" | |
384 | : | |
385 | : "r" (Cr3) | |
386 | ); | |
387 | return Cr3; | |
388 | } | |
389 | ||
390 | ||
391 | /** | |
392 | Writes a value to Control Register 4 (CR4). | |
393 | ||
394 | Writes and returns a new value to CR4. This function is only available on | |
395 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
396 | ||
397 | @param Cr4 The value to write to CR4. | |
398 | ||
399 | @return The value written to CR4. | |
400 | ||
401 | **/ | |
402 | UINTN | |
403 | EFIAPI | |
404 | AsmWriteCr4 ( | |
405 | UINTN Cr4 | |
406 | ) | |
407 | { | |
408 | __asm__ __volatile__ ( | |
409 | "movl %0, %%cr4" | |
410 | : | |
411 | : "r" (Cr4) | |
412 | ); | |
413 | return Cr4; | |
414 | } | |
415 | ||
416 | ||
417 | /** | |
418 | Reads the current value of Debug Register 0 (DR0). | |
419 | ||
420 | Reads and returns the current value of DR0. This function is only available | |
421 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
422 | X64. | |
423 | ||
424 | @return The value of Debug Register 0 (DR0). | |
425 | ||
426 | **/ | |
427 | UINTN | |
428 | EFIAPI | |
429 | AsmReadDr0 ( | |
430 | VOID | |
431 | ) | |
432 | { | |
433 | UINTN Data; | |
434 | ||
435 | __asm__ __volatile__ ( | |
436 | "movl %%dr0, %0" | |
437 | : "=r" (Data) | |
438 | ); | |
439 | ||
440 | return Data; | |
441 | } | |
442 | ||
443 | ||
444 | /** | |
445 | Reads the current value of Debug Register 1 (DR1). | |
446 | ||
447 | Reads and returns the current value of DR1. This function is only available | |
448 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
449 | X64. | |
450 | ||
451 | @return The value of Debug Register 1 (DR1). | |
452 | ||
453 | **/ | |
454 | UINTN | |
455 | EFIAPI | |
456 | AsmReadDr1 ( | |
457 | VOID | |
458 | ) | |
459 | { | |
460 | UINTN Data; | |
461 | ||
462 | __asm__ __volatile__ ( | |
463 | "movl %%dr1, %0" | |
464 | : "=r" (Data) | |
465 | ); | |
466 | ||
467 | return Data; | |
468 | } | |
469 | ||
470 | ||
471 | /** | |
472 | Reads the current value of Debug Register 2 (DR2). | |
473 | ||
474 | Reads and returns the current value of DR2. This function is only available | |
475 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
476 | X64. | |
477 | ||
478 | @return The value of Debug Register 2 (DR2). | |
479 | ||
480 | **/ | |
481 | UINTN | |
482 | EFIAPI | |
483 | AsmReadDr2 ( | |
484 | VOID | |
485 | ) | |
486 | { | |
487 | UINTN Data; | |
488 | ||
489 | __asm__ __volatile__ ( | |
490 | "movl %%dr2, %0" | |
491 | : "=r" (Data) | |
492 | ); | |
493 | ||
494 | return Data; | |
495 | } | |
496 | ||
497 | ||
498 | /** | |
499 | Reads the current value of Debug Register 3 (DR3). | |
500 | ||
501 | Reads and returns the current value of DR3. This function is only available | |
502 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
503 | X64. | |
504 | ||
505 | @return The value of Debug Register 3 (DR3). | |
506 | ||
507 | **/ | |
508 | UINTN | |
509 | EFIAPI | |
510 | AsmReadDr3 ( | |
511 | VOID | |
512 | ) | |
513 | { | |
514 | UINTN Data; | |
515 | ||
516 | __asm__ __volatile__ ( | |
517 | "movl %%dr3, %0" | |
518 | : "=r" (Data) | |
519 | ); | |
520 | ||
521 | return Data; | |
522 | } | |
523 | ||
524 | ||
525 | /** | |
526 | Reads the current value of Debug Register 4 (DR4). | |
527 | ||
528 | Reads and returns the current value of DR4. This function is only available | |
529 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
530 | X64. | |
531 | ||
532 | @return The value of Debug Register 4 (DR4). | |
533 | ||
534 | **/ | |
535 | UINTN | |
536 | EFIAPI | |
537 | AsmReadDr4 ( | |
538 | VOID | |
539 | ) | |
540 | { | |
541 | UINTN Data; | |
542 | ||
543 | __asm__ __volatile__ ( | |
544 | "movl %%dr4, %0" | |
545 | : "=r" (Data) | |
546 | ); | |
547 | ||
548 | return Data; | |
549 | } | |
550 | ||
551 | ||
552 | /** | |
553 | Reads the current value of Debug Register 5 (DR5). | |
554 | ||
555 | Reads and returns the current value of DR5. This function is only available | |
556 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
557 | X64. | |
558 | ||
559 | @return The value of Debug Register 5 (DR5). | |
560 | ||
561 | **/ | |
562 | UINTN | |
563 | EFIAPI | |
564 | AsmReadDr5 ( | |
565 | VOID | |
566 | ) | |
567 | { | |
568 | UINTN Data; | |
569 | ||
570 | __asm__ __volatile__ ( | |
571 | "movl %%dr5, %0" | |
572 | : "=r" (Data) | |
573 | ); | |
574 | ||
575 | return Data; | |
576 | } | |
577 | ||
578 | ||
579 | /** | |
580 | Reads the current value of Debug Register 6 (DR6). | |
581 | ||
582 | Reads and returns the current value of DR6. This function is only available | |
583 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
584 | X64. | |
585 | ||
586 | @return The value of Debug Register 6 (DR6). | |
587 | ||
588 | **/ | |
589 | UINTN | |
590 | EFIAPI | |
591 | AsmReadDr6 ( | |
592 | VOID | |
593 | ) | |
594 | { | |
595 | UINTN Data; | |
596 | ||
597 | __asm__ __volatile__ ( | |
598 | "movl %%dr6, %0" | |
599 | : "=r" (Data) | |
600 | ); | |
601 | ||
602 | return Data; | |
603 | } | |
604 | ||
605 | ||
606 | /** | |
607 | Reads the current value of Debug Register 7 (DR7). | |
608 | ||
609 | Reads and returns the current value of DR7. This function is only available | |
610 | on IA-32 and X64. This returns a 32-bit value on IA-32 and a 64-bit value on | |
611 | X64. | |
612 | ||
613 | @return The value of Debug Register 7 (DR7). | |
614 | ||
615 | **/ | |
616 | UINTN | |
617 | EFIAPI | |
618 | AsmReadDr7 ( | |
619 | VOID | |
620 | ) | |
621 | { | |
622 | UINTN Data; | |
623 | ||
624 | __asm__ __volatile__ ( | |
625 | "movl %%dr7, %0" | |
626 | : "=r" (Data) | |
627 | ); | |
628 | ||
629 | return Data; | |
630 | } | |
631 | ||
632 | ||
633 | /** | |
634 | Writes a value to Debug Register 0 (DR0). | |
635 | ||
636 | Writes and returns a new value to DR0. This function is only available on | |
637 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
638 | ||
639 | @param Dr0 The value to write to Dr0. | |
640 | ||
641 | @return The value written to Debug Register 0 (DR0). | |
642 | ||
643 | **/ | |
644 | UINTN | |
645 | EFIAPI | |
646 | AsmWriteDr0 ( | |
647 | UINTN Dr0 | |
648 | ) | |
649 | { | |
650 | __asm__ __volatile__ ( | |
651 | "movl %0, %%dr0" | |
652 | : | |
653 | : "r" (Dr0) | |
654 | ); | |
655 | return Dr0; | |
656 | } | |
657 | ||
658 | ||
659 | /** | |
660 | Writes a value to Debug Register 1 (DR1). | |
661 | ||
662 | Writes and returns a new value to DR1. This function is only available on | |
663 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
664 | ||
665 | @param Dr1 The value to write to Dr1. | |
666 | ||
667 | @return The value written to Debug Register 1 (DR1). | |
668 | ||
669 | **/ | |
670 | UINTN | |
671 | EFIAPI | |
672 | AsmWriteDr1 ( | |
673 | UINTN Dr1 | |
674 | ) | |
675 | { | |
676 | __asm__ __volatile__ ( | |
677 | "movl %0, %%dr1" | |
678 | : | |
679 | : "r" (Dr1) | |
680 | ); | |
681 | return Dr1; | |
682 | } | |
683 | ||
684 | ||
685 | /** | |
686 | Writes a value to Debug Register 2 (DR2). | |
687 | ||
688 | Writes and returns a new value to DR2. This function is only available on | |
689 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
690 | ||
691 | @param Dr2 The value to write to Dr2. | |
692 | ||
693 | @return The value written to Debug Register 2 (DR2). | |
694 | ||
695 | **/ | |
696 | UINTN | |
697 | EFIAPI | |
698 | AsmWriteDr2 ( | |
699 | UINTN Dr2 | |
700 | ) | |
701 | { | |
702 | __asm__ __volatile__ ( | |
703 | "movl %0, %%dr2" | |
704 | : | |
705 | : "r" (Dr2) | |
706 | ); | |
707 | return Dr2; | |
708 | } | |
709 | ||
710 | ||
711 | /** | |
712 | Writes a value to Debug Register 3 (DR3). | |
713 | ||
714 | Writes and returns a new value to DR3. This function is only available on | |
715 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
716 | ||
717 | @param Dr3 The value to write to Dr3. | |
718 | ||
719 | @return The value written to Debug Register 3 (DR3). | |
720 | ||
721 | **/ | |
722 | UINTN | |
723 | EFIAPI | |
724 | AsmWriteDr3 ( | |
725 | UINTN Dr3 | |
726 | ) | |
727 | { | |
728 | __asm__ __volatile__ ( | |
729 | "movl %0, %%dr3" | |
730 | : | |
731 | : "r" (Dr3) | |
732 | ); | |
733 | return Dr3; | |
734 | } | |
735 | ||
736 | ||
737 | /** | |
738 | Writes a value to Debug Register 4 (DR4). | |
739 | ||
740 | Writes and returns a new value to DR4. This function is only available on | |
741 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
742 | ||
743 | @param Dr4 The value to write to Dr4. | |
744 | ||
745 | @return The value written to Debug Register 4 (DR4). | |
746 | ||
747 | **/ | |
748 | UINTN | |
749 | EFIAPI | |
750 | AsmWriteDr4 ( | |
751 | UINTN Dr4 | |
752 | ) | |
753 | { | |
754 | __asm__ __volatile__ ( | |
755 | "movl %0, %%dr4" | |
756 | : | |
757 | : "r" (Dr4) | |
758 | ); | |
759 | return Dr4; | |
760 | } | |
761 | ||
762 | ||
763 | /** | |
764 | Writes a value to Debug Register 5 (DR5). | |
765 | ||
766 | Writes and returns a new value to DR5. This function is only available on | |
767 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
768 | ||
769 | @param Dr5 The value to write to Dr5. | |
770 | ||
771 | @return The value written to Debug Register 5 (DR5). | |
772 | ||
773 | **/ | |
774 | UINTN | |
775 | EFIAPI | |
776 | AsmWriteDr5 ( | |
777 | UINTN Dr5 | |
778 | ) | |
779 | { | |
780 | __asm__ __volatile__ ( | |
781 | "movl %0, %%dr5" | |
782 | : | |
783 | : "r" (Dr5) | |
784 | ); | |
785 | return Dr5; | |
786 | } | |
787 | ||
788 | ||
789 | /** | |
790 | Writes a value to Debug Register 6 (DR6). | |
791 | ||
792 | Writes and returns a new value to DR6. This function is only available on | |
793 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
794 | ||
795 | @param Dr6 The value to write to Dr6. | |
796 | ||
797 | @return The value written to Debug Register 6 (DR6). | |
798 | ||
799 | **/ | |
800 | UINTN | |
801 | EFIAPI | |
802 | AsmWriteDr6 ( | |
803 | UINTN Dr6 | |
804 | ) | |
805 | { | |
806 | __asm__ __volatile__ ( | |
807 | "movl %0, %%dr6" | |
808 | : | |
809 | : "r" (Dr6) | |
810 | ); | |
811 | return Dr6; | |
812 | } | |
813 | ||
814 | ||
815 | /** | |
816 | Writes a value to Debug Register 7 (DR7). | |
817 | ||
818 | Writes and returns a new value to DR7. This function is only available on | |
819 | IA-32 and X64. This writes a 32-bit value on IA-32 and a 64-bit value on X64. | |
820 | ||
821 | @param Dr7 The value to write to Dr7. | |
822 | ||
823 | @return The value written to Debug Register 7 (DR7). | |
824 | ||
825 | **/ | |
826 | UINTN | |
827 | EFIAPI | |
828 | AsmWriteDr7 ( | |
829 | UINTN Dr7 | |
830 | ) | |
831 | { | |
832 | __asm__ __volatile__ ( | |
833 | "movl %0, %%dr7" | |
834 | : | |
835 | : "r" (Dr7) | |
836 | ); | |
837 | return Dr7; | |
838 | } | |
839 | ||
840 | ||
841 | /** | |
842 | Reads the current value of Code Segment Register (CS). | |
843 | ||
844 | Reads and returns the current value of CS. This function is only available on | |
845 | IA-32 and X64. | |
846 | ||
847 | @return The current value of CS. | |
848 | ||
849 | **/ | |
850 | UINT16 | |
851 | EFIAPI | |
852 | AsmReadCs ( | |
853 | VOID | |
854 | ) | |
855 | { | |
856 | UINT16 Data; | |
857 | ||
858 | __asm__ __volatile__ ( | |
859 | "mov %%cs, %0" | |
860 | :"=a" (Data) | |
861 | ); | |
862 | ||
863 | return Data; | |
864 | } | |
865 | ||
866 | ||
867 | /** | |
868 | Reads the current value of Data Segment Register (DS). | |
869 | ||
870 | Reads and returns the current value of DS. This function is only available on | |
871 | IA-32 and X64. | |
872 | ||
873 | @return The current value of DS. | |
874 | ||
875 | **/ | |
876 | UINT16 | |
877 | EFIAPI | |
878 | AsmReadDs ( | |
879 | VOID | |
880 | ) | |
881 | { | |
882 | UINT16 Data; | |
883 | ||
884 | __asm__ __volatile__ ( | |
885 | "mov %%ds, %0" | |
886 | :"=a" (Data) | |
887 | ); | |
888 | ||
889 | return Data; | |
890 | } | |
891 | ||
892 | ||
893 | /** | |
894 | Reads the current value of Extra Segment Register (ES). | |
895 | ||
896 | Reads and returns the current value of ES. This function is only available on | |
897 | IA-32 and X64. | |
898 | ||
899 | @return The current value of ES. | |
900 | ||
901 | **/ | |
902 | UINT16 | |
903 | EFIAPI | |
904 | AsmReadEs ( | |
905 | VOID | |
906 | ) | |
907 | { | |
908 | UINT16 Data; | |
909 | ||
910 | __asm__ __volatile__ ( | |
911 | "mov %%es, %0" | |
912 | :"=a" (Data) | |
913 | ); | |
914 | ||
915 | return Data; | |
916 | } | |
917 | ||
918 | ||
919 | /** | |
920 | Reads the current value of FS Data Segment Register (FS). | |
921 | ||
922 | Reads and returns the current value of FS. This function is only available on | |
923 | IA-32 and X64. | |
924 | ||
925 | @return The current value of FS. | |
926 | ||
927 | **/ | |
928 | UINT16 | |
929 | EFIAPI | |
930 | AsmReadFs ( | |
931 | VOID | |
932 | ) | |
933 | { | |
934 | UINT16 Data; | |
935 | ||
936 | __asm__ __volatile__ ( | |
937 | "mov %%fs, %0" | |
938 | :"=a" (Data) | |
939 | ); | |
940 | ||
941 | return Data; | |
942 | } | |
943 | ||
944 | ||
945 | /** | |
946 | Reads the current value of GS Data Segment Register (GS). | |
947 | ||
948 | Reads and returns the current value of GS. This function is only available on | |
949 | IA-32 and X64. | |
950 | ||
951 | @return The current value of GS. | |
952 | ||
953 | **/ | |
954 | UINT16 | |
955 | EFIAPI | |
956 | AsmReadGs ( | |
957 | VOID | |
958 | ) | |
959 | { | |
960 | UINT16 Data; | |
961 | ||
962 | __asm__ __volatile__ ( | |
963 | "mov %%gs, %0" | |
964 | :"=a" (Data) | |
965 | ); | |
966 | ||
967 | return Data; | |
968 | } | |
969 | ||
970 | ||
971 | /** | |
972 | Reads the current value of Stack Segment Register (SS). | |
973 | ||
974 | Reads and returns the current value of SS. This function is only available on | |
975 | IA-32 and X64. | |
976 | ||
977 | @return The current value of SS. | |
978 | ||
979 | **/ | |
980 | UINT16 | |
981 | EFIAPI | |
982 | AsmReadSs ( | |
983 | VOID | |
984 | ) | |
985 | { | |
986 | UINT16 Data; | |
987 | ||
988 | __asm__ __volatile__ ( | |
989 | "mov %%ds, %0" | |
990 | :"=a" (Data) | |
991 | ); | |
992 | ||
993 | return Data; | |
994 | } | |
995 | ||
996 | ||
997 | /** | |
998 | Reads the current value of Task Register (TR). | |
999 | ||
1000 | Reads and returns the current value of TR. This function is only available on | |
1001 | IA-32 and X64. | |
1002 | ||
1003 | @return The current value of TR. | |
1004 | ||
1005 | **/ | |
1006 | UINT16 | |
1007 | EFIAPI | |
1008 | AsmReadTr ( | |
1009 | VOID | |
1010 | ) | |
1011 | { | |
1012 | UINT16 Data; | |
1013 | ||
1014 | __asm__ __volatile__ ( | |
1015 | "str %0" | |
1016 | : "=a" (Data) | |
1017 | ); | |
1018 | ||
1019 | return Data; | |
1020 | } | |
1021 | ||
1022 | ||
1023 | /** | |
1024 | Reads the current Global Descriptor Table Register(GDTR) descriptor. | |
1025 | ||
1026 | Reads and returns the current GDTR descriptor and returns it in Gdtr. This | |
1027 | function is only available on IA-32 and X64. | |
1028 | ||
1029 | @param Gdtr Pointer to a GDTR descriptor. | |
1030 | ||
1031 | **/ | |
1032 | VOID | |
1033 | EFIAPI | |
1034 | InternalX86ReadGdtr ( | |
1035 | OUT IA32_DESCRIPTOR *Gdtr | |
1036 | ) | |
1037 | { | |
1038 | __asm__ __volatile__ ( | |
1039 | "sgdt %0" | |
1040 | : "=m" (*Gdtr) | |
1041 | ); | |
1042 | } | |
1043 | ||
1044 | ||
1045 | /** | |
1046 | Writes the current Global Descriptor Table Register (GDTR) descriptor. | |
1047 | ||
1048 | Writes and the current GDTR descriptor specified by Gdtr. This function is | |
1049 | only available on IA-32 and X64. | |
1050 | ||
1051 | @param Gdtr Pointer to a GDTR descriptor. | |
1052 | ||
1053 | **/ | |
1054 | VOID | |
1055 | EFIAPI | |
1056 | InternalX86WriteGdtr ( | |
1057 | IN CONST IA32_DESCRIPTOR *Gdtr | |
1058 | ) | |
1059 | { | |
1060 | __asm__ __volatile__ ( | |
1061 | "lgdt %0" | |
1062 | : | |
1063 | : "m" (*Gdtr) | |
1064 | ); | |
1065 | ||
1066 | } | |
1067 | ||
1068 | ||
1069 | /** | |
1070 | Reads the current Interrupt Descriptor Table Register(GDTR) descriptor. | |
1071 | ||
1072 | Reads and returns the current IDTR descriptor and returns it in Idtr. This | |
1073 | function is only available on IA-32 and X64. | |
1074 | ||
1075 | @param Idtr Pointer to a IDTR descriptor. | |
1076 | ||
1077 | **/ | |
1078 | VOID | |
1079 | EFIAPI | |
1080 | InternalX86ReadIdtr ( | |
1081 | OUT IA32_DESCRIPTOR *Ldtr | |
1082 | ) | |
1083 | { | |
1084 | __asm__ __volatile__ ( | |
1085 | "sldt %0" | |
1086 | : "=m" (*Ldtr) | |
1087 | ); | |
1088 | } | |
1089 | ||
1090 | ||
1091 | /** | |
1092 | Writes the current Interrupt Descriptor Table Register(GDTR) descriptor. | |
1093 | ||
1094 | Writes the current IDTR descriptor and returns it in Idtr. This function is | |
1095 | only available on IA-32 and X64. | |
1096 | ||
1097 | @param Idtr Pointer to a IDTR descriptor. | |
1098 | ||
1099 | **/ | |
1100 | VOID | |
1101 | EFIAPI | |
1102 | InternalX86WriteIdtr ( | |
1103 | IN CONST IA32_DESCRIPTOR *Ldtr | |
1104 | ) | |
1105 | { | |
1106 | __asm__ __volatile__ ( | |
1107 | "lidt %0" | |
1108 | : | |
1109 | : "m" (*Ldtr) | |
1110 | ); | |
1111 | } | |
1112 | ||
1113 | ||
1114 | /** | |
1115 | Reads the current Local Descriptor Table Register(LDTR) selector. | |
1116 | ||
1117 | Reads and returns the current 16-bit LDTR descriptor value. This function is | |
1118 | only available on IA-32 and X64. | |
1119 | ||
1120 | @return The current selector of LDT. | |
1121 | ||
1122 | **/ | |
1123 | UINT16 | |
1124 | EFIAPI | |
1125 | AsmReadLdtr ( | |
1126 | VOID | |
1127 | ) | |
1128 | { | |
1129 | UINT16 Data; | |
1130 | ||
1131 | __asm__ __volatile__ ( | |
1132 | "sldt %0" | |
1133 | : "=g" (Data) // %0 | |
1134 | ); | |
1135 | ||
1136 | return Data; | |
1137 | } | |
1138 | ||
1139 | ||
1140 | /** | |
1141 | Writes the current Local Descriptor Table Register (GDTR) selector. | |
1142 | ||
1143 | Writes and the current LDTR descriptor specified by Ldtr. This function is | |
1144 | only available on IA-32 and X64. | |
1145 | ||
1146 | @param Ldtr 16-bit LDTR selector value. | |
1147 | ||
1148 | **/ | |
1149 | VOID | |
1150 | EFIAPI | |
1151 | AsmWriteLdtr ( | |
1152 | IN UINT16 Ldtr | |
1153 | ) | |
1154 | { | |
1155 | __asm__ __volatile__ ( | |
1156 | "lldtw %0" | |
1157 | : | |
1158 | : "g" (Ldtr) // %0 | |
1159 | ); | |
1160 | } | |
1161 | ||
1162 | ||
1163 | /** | |
1164 | Save the current floating point/SSE/SSE2 context to a buffer. | |
1165 | ||
1166 | Saves the current floating point/SSE/SSE2 state to the buffer specified by | |
1167 | Buffer. Buffer must be aligned on a 16-byte boundary. This function is only | |
1168 | available on IA-32 and X64. | |
1169 | ||
1170 | @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context. | |
1171 | ||
1172 | **/ | |
1173 | VOID | |
1174 | EFIAPI | |
1175 | InternalX86FxSave ( | |
1176 | OUT IA32_FX_BUFFER *Buffer | |
1177 | ) | |
1178 | { | |
1179 | __asm__ __volatile__ ( | |
1180 | "fxsave %0" | |
1181 | : | |
1182 | : "m" (*Buffer) // %0 | |
1183 | ); | |
1184 | } | |
1185 | ||
1186 | ||
1187 | /** | |
1188 | Restores the current floating point/SSE/SSE2 context from a buffer. | |
1189 | ||
1190 | Restores the current floating point/SSE/SSE2 state from the buffer specified | |
1191 | by Buffer. Buffer must be aligned on a 16-byte boundary. This function is | |
1192 | only available on IA-32 and X64. | |
1193 | ||
1194 | @param Buffer Pointer to a buffer to save the floating point/SSE/SSE2 context. | |
1195 | ||
1196 | **/ | |
1197 | VOID | |
1198 | EFIAPI | |
1199 | InternalX86FxRestore ( | |
1200 | IN CONST IA32_FX_BUFFER *Buffer | |
1201 | ) | |
1202 | { | |
1203 | __asm__ __volatile__ ( | |
1204 | "fxrstor %0" | |
1205 | : | |
1206 | : "m" (*Buffer) // %0 | |
1207 | ); | |
1208 | } | |
1209 | ||
1210 | ||
1211 | /** | |
1212 | Reads the current value of 64-bit MMX Register #0 (MM0). | |
1213 | ||
1214 | Reads and returns the current value of MM0. This function is only available | |
1215 | on IA-32 and X64. | |
1216 | ||
1217 | @return The current value of MM0. | |
1218 | ||
1219 | **/ | |
1220 | UINT64 | |
1221 | EFIAPI | |
1222 | AsmReadMm0 ( | |
1223 | VOID | |
1224 | ) | |
1225 | { | |
1226 | UINT64 Data; | |
1227 | ||
1228 | __asm__ __volatile__ ( | |
1229 | "push %%eax \n\t" | |
1230 | "push %%eax \n\t" | |
1231 | "movq %%mm0, (%%esp)\n\t" | |
1232 | "pop %%eax \n\t" | |
1233 | "pop %%edx \n\t" | |
1234 | : "=A" (Data) // %0 | |
1235 | ); | |
1236 | ||
1237 | return Data; | |
1238 | } | |
1239 | ||
1240 | ||
1241 | /** | |
1242 | Reads the current value of 64-bit MMX Register #1 (MM1). | |
1243 | ||
1244 | Reads and returns the current value of MM1. This function is only available | |
1245 | on IA-32 and X64. | |
1246 | ||
1247 | @return The current value of MM1. | |
1248 | ||
1249 | **/ | |
1250 | UINT64 | |
1251 | EFIAPI | |
1252 | AsmReadMm1 ( | |
1253 | VOID | |
1254 | ) | |
1255 | { | |
1256 | UINT64 Data; | |
1257 | ||
1258 | __asm__ __volatile__ ( | |
1259 | "push %%eax \n\t" | |
1260 | "push %%eax \n\t" | |
1261 | "movq %%mm1, (%%esp)\n\t" | |
1262 | "pop %%eax \n\t" | |
1263 | "pop %%edx \n\t" | |
1264 | : "=A" (Data) // %0 | |
1265 | ); | |
1266 | ||
1267 | return Data; | |
1268 | } | |
1269 | ||
1270 | ||
1271 | /** | |
1272 | Reads the current value of 64-bit MMX Register #2 (MM2). | |
1273 | ||
1274 | Reads and returns the current value of MM2. This function is only available | |
1275 | on IA-32 and X64. | |
1276 | ||
1277 | @return The current value of MM2. | |
1278 | ||
1279 | **/ | |
1280 | UINT64 | |
1281 | EFIAPI | |
1282 | AsmReadMm2 ( | |
1283 | VOID | |
1284 | ) | |
1285 | { | |
1286 | UINT64 Data; | |
1287 | ||
1288 | __asm__ __volatile__ ( | |
1289 | "push %%eax \n\t" | |
1290 | "push %%eax \n\t" | |
1291 | "movq %%mm2, (%%esp)\n\t" | |
1292 | "pop %%eax \n\t" | |
1293 | "pop %%edx \n\t" | |
1294 | : "=A" (Data) // %0 | |
1295 | ); | |
1296 | ||
1297 | return Data; | |
1298 | } | |
1299 | ||
1300 | ||
1301 | /** | |
1302 | Reads the current value of 64-bit MMX Register #3 (MM3). | |
1303 | ||
1304 | Reads and returns the current value of MM3. This function is only available | |
1305 | on IA-32 and X64. | |
1306 | ||
1307 | @return The current value of MM3. | |
1308 | ||
1309 | **/ | |
1310 | UINT64 | |
1311 | EFIAPI | |
1312 | AsmReadMm3 ( | |
1313 | VOID | |
1314 | ) | |
1315 | { | |
1316 | UINT64 Data; | |
1317 | ||
1318 | __asm__ __volatile__ ( | |
1319 | "push %%eax \n\t" | |
1320 | "push %%eax \n\t" | |
1321 | "movq %%mm3, (%%esp)\n\t" | |
1322 | "pop %%eax \n\t" | |
1323 | "pop %%edx \n\t" | |
1324 | : "=A" (Data) // %0 | |
1325 | ); | |
1326 | ||
1327 | return Data; | |
1328 | } | |
1329 | ||
1330 | ||
1331 | /** | |
1332 | Reads the current value of 64-bit MMX Register #4 (MM4). | |
1333 | ||
1334 | Reads and returns the current value of MM4. This function is only available | |
1335 | on IA-32 and X64. | |
1336 | ||
1337 | @return The current value of MM4. | |
1338 | ||
1339 | **/ | |
1340 | UINT64 | |
1341 | EFIAPI | |
1342 | AsmReadMm4 ( | |
1343 | VOID | |
1344 | ) | |
1345 | { | |
1346 | UINT64 Data; | |
1347 | ||
1348 | __asm__ __volatile__ ( | |
1349 | "push %%eax \n\t" | |
1350 | "push %%eax \n\t" | |
1351 | "movq %%mm4, (%%esp)\n\t" | |
1352 | "pop %%eax \n\t" | |
1353 | "pop %%edx \n\t" | |
1354 | : "=A" (Data) // %0 | |
1355 | ); | |
1356 | ||
1357 | return Data; | |
1358 | } | |
1359 | ||
1360 | ||
1361 | /** | |
1362 | Reads the current value of 64-bit MMX Register #5 (MM5). | |
1363 | ||
1364 | Reads and returns the current value of MM5. This function is only available | |
1365 | on IA-32 and X64. | |
1366 | ||
1367 | @return The current value of MM5. | |
1368 | ||
1369 | **/ | |
1370 | UINT64 | |
1371 | EFIAPI | |
1372 | AsmReadMm5 ( | |
1373 | VOID | |
1374 | ) | |
1375 | { | |
1376 | UINT64 Data; | |
1377 | ||
1378 | __asm__ __volatile__ ( | |
1379 | "push %%eax \n\t" | |
1380 | "push %%eax \n\t" | |
1381 | "movq %%mm5, (%%esp)\n\t" | |
1382 | "pop %%eax \n\t" | |
1383 | "pop %%edx \n\t" | |
1384 | : "=A" (Data) // %0 | |
1385 | ); | |
1386 | ||
1387 | return Data; | |
1388 | } | |
1389 | ||
1390 | ||
1391 | /** | |
1392 | Reads the current value of 64-bit MMX Register #6 (MM6). | |
1393 | ||
1394 | Reads and returns the current value of MM6. This function is only available | |
1395 | on IA-32 and X64. | |
1396 | ||
1397 | @return The current value of MM6. | |
1398 | ||
1399 | **/ | |
1400 | UINT64 | |
1401 | EFIAPI | |
1402 | AsmReadMm6 ( | |
1403 | VOID | |
1404 | ) | |
1405 | { | |
1406 | UINT64 Data; | |
1407 | ||
1408 | __asm__ __volatile__ ( | |
1409 | "push %%eax \n\t" | |
1410 | "push %%eax \n\t" | |
1411 | "movq %%mm6, (%%esp)\n\t" | |
1412 | "pop %%eax \n\t" | |
1413 | "pop %%edx \n\t" | |
1414 | : "=A" (Data) // %0 | |
1415 | ); | |
1416 | ||
1417 | return Data; | |
1418 | } | |
1419 | ||
1420 | ||
1421 | /** | |
1422 | Reads the current value of 64-bit MMX Register #7 (MM7). | |
1423 | ||
1424 | Reads and returns the current value of MM7. This function is only available | |
1425 | on IA-32 and X64. | |
1426 | ||
1427 | @return The current value of MM7. | |
1428 | ||
1429 | **/ | |
1430 | UINT64 | |
1431 | EFIAPI | |
1432 | AsmReadMm7 ( | |
1433 | VOID | |
1434 | ) | |
1435 | { | |
1436 | UINT64 Data; | |
1437 | ||
1438 | __asm__ __volatile__ ( | |
1439 | "push %%eax \n\t" | |
1440 | "push %%eax \n\t" | |
1441 | "movq %%mm7, (%%esp)\n\t" | |
1442 | "pop %%eax \n\t" | |
1443 | "pop %%edx \n\t" | |
1444 | : "=A" (Data) // %0 | |
1445 | ); | |
1446 | ||
1447 | return Data; | |
1448 | } | |
1449 | ||
1450 | ||
1451 | /** | |
1452 | Writes the current value of 64-bit MMX Register #0 (MM0). | |
1453 | ||
1454 | Writes the current value of MM0. This function is only available on IA32 and | |
1455 | X64. | |
1456 | ||
1457 | @param Value The 64-bit value to write to MM0. | |
1458 | ||
1459 | **/ | |
1460 | VOID | |
1461 | EFIAPI | |
1462 | AsmWriteMm0 ( | |
1463 | IN UINT64 Value | |
1464 | ) | |
1465 | { | |
1466 | __asm__ __volatile__ ( | |
1467 | "movq %0, %%mm0" // %0 | |
1468 | : | |
1469 | : "m" (Value) | |
1470 | ); | |
1471 | } | |
1472 | ||
1473 | ||
1474 | /** | |
1475 | Writes the current value of 64-bit MMX Register #1 (MM1). | |
1476 | ||
1477 | Writes the current value of MM1. This function is only available on IA32 and | |
1478 | X64. | |
1479 | ||
1480 | @param Value The 64-bit value to write to MM1. | |
1481 | ||
1482 | **/ | |
1483 | VOID | |
1484 | EFIAPI | |
1485 | AsmWriteMm1 ( | |
1486 | IN UINT64 Value | |
1487 | ) | |
1488 | { | |
1489 | __asm__ __volatile__ ( | |
1490 | "movq %0, %%mm1" // %0 | |
1491 | : | |
1492 | : "m" (Value) | |
1493 | ); | |
1494 | } | |
1495 | ||
1496 | ||
1497 | /** | |
1498 | Writes the current value of 64-bit MMX Register #2 (MM2). | |
1499 | ||
1500 | Writes the current value of MM2. This function is only available on IA32 and | |
1501 | X64. | |
1502 | ||
1503 | @param Value The 64-bit value to write to MM2. | |
1504 | ||
1505 | **/ | |
1506 | VOID | |
1507 | EFIAPI | |
1508 | AsmWriteMm2 ( | |
1509 | IN UINT64 Value | |
1510 | ) | |
1511 | { | |
1512 | __asm__ __volatile__ ( | |
1513 | "movq %0, %%mm2" // %0 | |
1514 | : | |
1515 | : "m" (Value) | |
1516 | ); | |
1517 | } | |
1518 | ||
1519 | ||
1520 | /** | |
1521 | Writes the current value of 64-bit MMX Register #3 (MM3). | |
1522 | ||
1523 | Writes the current value of MM3. This function is only available on IA32 and | |
1524 | X64. | |
1525 | ||
1526 | @param Value The 64-bit value to write to MM3. | |
1527 | ||
1528 | **/ | |
1529 | VOID | |
1530 | EFIAPI | |
1531 | AsmWriteMm3 ( | |
1532 | IN UINT64 Value | |
1533 | ) | |
1534 | { | |
1535 | __asm__ __volatile__ ( | |
1536 | "movq %0, %%mm3" // %0 | |
1537 | : | |
1538 | : "m" (Value) | |
1539 | ); | |
1540 | } | |
1541 | ||
1542 | ||
1543 | /** | |
1544 | Writes the current value of 64-bit MMX Register #4 (MM4). | |
1545 | ||
1546 | Writes the current value of MM4. This function is only available on IA32 and | |
1547 | X64. | |
1548 | ||
1549 | @param Value The 64-bit value to write to MM4. | |
1550 | ||
1551 | **/ | |
1552 | VOID | |
1553 | EFIAPI | |
1554 | AsmWriteMm4 ( | |
1555 | IN UINT64 Value | |
1556 | ) | |
1557 | { | |
1558 | __asm__ __volatile__ ( | |
1559 | "movq %0, %%mm4" // %0 | |
1560 | : | |
1561 | : "m" (Value) | |
1562 | ); | |
1563 | } | |
1564 | ||
1565 | ||
1566 | /** | |
1567 | Writes the current value of 64-bit MMX Register #5 (MM5). | |
1568 | ||
1569 | Writes the current value of MM5. This function is only available on IA32 and | |
1570 | X64. | |
1571 | ||
1572 | @param Value The 64-bit value to write to MM5. | |
1573 | ||
1574 | **/ | |
1575 | VOID | |
1576 | EFIAPI | |
1577 | AsmWriteMm5 ( | |
1578 | IN UINT64 Value | |
1579 | ) | |
1580 | { | |
1581 | __asm__ __volatile__ ( | |
1582 | "movq %0, %%mm5" // %0 | |
1583 | : | |
1584 | : "m" (Value) | |
1585 | ); | |
1586 | } | |
1587 | ||
1588 | ||
1589 | /** | |
1590 | Writes the current value of 64-bit MMX Register #6 (MM6). | |
1591 | ||
1592 | Writes the current value of MM6. This function is only available on IA32 and | |
1593 | X64. | |
1594 | ||
1595 | @param Value The 64-bit value to write to MM6. | |
1596 | ||
1597 | **/ | |
1598 | VOID | |
1599 | EFIAPI | |
1600 | AsmWriteMm6 ( | |
1601 | IN UINT64 Value | |
1602 | ) | |
1603 | { | |
1604 | __asm__ __volatile__ ( | |
1605 | "movq %0, %%mm6" // %0 | |
1606 | : | |
1607 | : "m" (Value) | |
1608 | ); | |
1609 | } | |
1610 | ||
1611 | ||
1612 | /** | |
1613 | Writes the current value of 64-bit MMX Register #7 (MM7). | |
1614 | ||
1615 | Writes the current value of MM7. This function is only available on IA32 and | |
1616 | X64. | |
1617 | ||
1618 | @param Value The 64-bit value to write to MM7. | |
1619 | ||
1620 | **/ | |
1621 | VOID | |
1622 | EFIAPI | |
1623 | AsmWriteMm7 ( | |
1624 | IN UINT64 Value | |
1625 | ) | |
1626 | { | |
1627 | __asm__ __volatile__ ( | |
1628 | "movq %0, %%mm7" // %0 | |
1629 | : | |
1630 | : "m" (Value) | |
1631 | ); | |
1632 | } | |
1633 | ||
1634 | ||
1635 | /** | |
1636 | Reads the current value of Time Stamp Counter (TSC). | |
1637 | ||
1638 | Reads and returns the current value of TSC. This function is only available | |
1639 | on IA-32 and X64. | |
1640 | ||
1641 | @return The current value of TSC | |
1642 | ||
1643 | **/ | |
1644 | UINT64 | |
1645 | EFIAPI | |
1646 | AsmReadTsc ( | |
1647 | VOID | |
1648 | ) | |
1649 | { | |
1650 | UINT64 Data; | |
1651 | ||
1652 | __asm__ __volatile__ ( | |
1653 | "rdtsc" | |
1654 | : "=A" (Data) | |
1655 | ); | |
1656 | ||
1657 | return Data; | |
1658 | } | |
1659 | ||
1660 | ||
1661 | /** | |
1662 | Reads the current value of a Performance Counter (PMC). | |
1663 | ||
1664 | Reads and returns the current value of performance counter specified by | |
1665 | Index. This function is only available on IA-32 and X64. | |
1666 | ||
1667 | @param Index The 32-bit Performance Counter index to read. | |
1668 | ||
1669 | @return The value of the PMC specified by Index. | |
1670 | ||
1671 | **/ | |
1672 | UINT64 | |
1673 | EFIAPI | |
1674 | AsmReadPmc ( | |
1675 | IN UINT32 Index | |
1676 | ) | |
1677 | { | |
1678 | UINT64 Data; | |
1679 | ||
1680 | __asm__ __volatile__ ( | |
1681 | "rdpmc" | |
1682 | : "=A" (Data) | |
1683 | : "c" (Index) | |
1684 | ); | |
1685 | ||
1686 | return Data; | |
1687 | } | |
1688 | ||
1689 | ||
1690 | ||
1691 | ||
1692 | /** | |
1693 | Executes a WBINVD instruction. | |
1694 | ||
1695 | Executes a WBINVD instruction. This function is only available on IA-32 and | |
1696 | X64. | |
1697 | ||
1698 | **/ | |
1699 | VOID | |
1700 | EFIAPI | |
1701 | AsmWbinvd ( | |
1702 | VOID | |
1703 | ) | |
1704 | { | |
1705 | __asm__ __volatile__ ("wbinvd":::"memory"); | |
1706 | } | |
1707 | ||
1708 | ||
1709 | /** | |
1710 | Executes a INVD instruction. | |
1711 | ||
1712 | Executes a INVD instruction. This function is only available on IA-32 and | |
1713 | X64. | |
1714 | ||
1715 | **/ | |
1716 | VOID | |
1717 | EFIAPI | |
1718 | AsmInvd ( | |
1719 | VOID | |
1720 | ) | |
1721 | { | |
1722 | __asm__ __volatile__ ("invd":::"memory"); | |
1723 | ||
1724 | } | |
1725 | ||
1726 | ||
1727 | /** | |
1728 | Flushes a cache line from all the instruction and data caches within the | |
1729 | coherency domain of the CPU. | |
1730 | ||
1731 | Flushed the cache line specified by LinearAddress, and returns LinearAddress. | |
1732 | This function is only available on IA-32 and X64. | |
1733 | ||
1734 | @param LinearAddress The address of the cache line to flush. If the CPU is | |
1735 | in a physical addressing mode, then LinearAddress is a | |
1736 | physical address. If the CPU is in a virtual | |
1737 | addressing mode, then LinearAddress is a virtual | |
1738 | address. | |
1739 | ||
1740 | @return LinearAddress | |
1741 | **/ | |
1742 | VOID * | |
1743 | EFIAPI | |
1744 | AsmFlushCacheLine ( | |
1745 | IN VOID *LinearAddress | |
1746 | ) | |
1747 | { | |
1748 | __asm__ __volatile__ ( | |
1749 | "clflush (%0)" | |
1750 | : "+a" (LinearAddress) | |
1751 | : | |
1752 | : "memory" | |
1753 | ); | |
1754 | ||
1755 | return LinearAddress; | |
1756 | } | |
1757 | ||
1758 |