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-rw-r--r--include/asm-i386/system.h62
1 files changed, 1 insertions, 61 deletions
diff --git a/include/asm-i386/system.h b/include/asm-i386/system.h
index 399145a247f2..d0d8d7448d88 100644
--- a/include/asm-i386/system.h
+++ b/include/asm-i386/system.h
@@ -352,67 +352,6 @@ static inline unsigned long long __cmpxchg64(volatile void *ptr, unsigned long l
352 352
353#endif 353#endif
354 354
355#ifdef __KERNEL__
356struct alt_instr {
357 __u8 *instr; /* original instruction */
358 __u8 *replacement;
359 __u8 cpuid; /* cpuid bit set for replacement */
360 __u8 instrlen; /* length of original instruction */
361 __u8 replacementlen; /* length of new instruction, <= instrlen */
362 __u8 pad;
363};
364#endif
365
366/*
367 * Alternative instructions for different CPU types or capabilities.
368 *
369 * This allows to use optimized instructions even on generic binary
370 * kernels.
371 *
372 * length of oldinstr must be longer or equal the length of newinstr
373 * It can be padded with nops as needed.
374 *
375 * For non barrier like inlines please define new variants
376 * without volatile and memory clobber.
377 */
378#define alternative(oldinstr, newinstr, feature) \
379 asm volatile ("661:\n\t" oldinstr "\n662:\n" \
380 ".section .altinstructions,\"a\"\n" \
381 " .align 4\n" \
382 " .long 661b\n" /* label */ \
383 " .long 663f\n" /* new instruction */ \
384 " .byte %c0\n" /* feature bit */ \
385 " .byte 662b-661b\n" /* sourcelen */ \
386 " .byte 664f-663f\n" /* replacementlen */ \
387 ".previous\n" \
388 ".section .altinstr_replacement,\"ax\"\n" \
389 "663:\n\t" newinstr "\n664:\n" /* replacement */ \
390 ".previous" :: "i" (feature) : "memory")
391
392/*
393 * Alternative inline assembly with input.
394 *
395 * Pecularities:
396 * No memory clobber here.
397 * Argument numbers start with 1.
398 * Best is to use constraints that are fixed size (like (%1) ... "r")
399 * If you use variable sized constraints like "m" or "g" in the
400 * replacement maake sure to pad to the worst case length.
401 */
402#define alternative_input(oldinstr, newinstr, feature, input...) \
403 asm volatile ("661:\n\t" oldinstr "\n662:\n" \
404 ".section .altinstructions,\"a\"\n" \
405 " .align 4\n" \
406 " .long 661b\n" /* label */ \
407 " .long 663f\n" /* new instruction */ \
408 " .byte %c0\n" /* feature bit */ \
409 " .byte 662b-661b\n" /* sourcelen */ \
410 " .byte 664f-663f\n" /* replacementlen */ \
411 ".previous\n" \
412 ".section .altinstr_replacement,\"ax\"\n" \
413 "663:\n\t" newinstr "\n664:\n" /* replacement */ \
414 ".previous" :: "i" (feature), ##input)
415
416/* 355/*
417 * Force strict CPU ordering. 356 * Force strict CPU ordering.
418 * And yes, this is required on UP too when we're talking 357 * And yes, this is required on UP too when we're talking
@@ -558,5 +497,6 @@ static inline void sched_cacheflush(void)
558} 497}
559 498
560extern unsigned long arch_align_stack(unsigned long sp); 499extern unsigned long arch_align_stack(unsigned long sp);
500extern void free_init_pages(char *what, unsigned long begin, unsigned long end);
561 501
562#endif 502#endif