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Diffstat (limited to 'include/asm-mips/cmpxchg.h')
| -rw-r--r-- | include/asm-mips/cmpxchg.h | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/include/asm-mips/cmpxchg.h b/include/asm-mips/cmpxchg.h deleted file mode 100644 index 4a812c3ceb90..000000000000 --- a/include/asm-mips/cmpxchg.h +++ /dev/null @@ -1,124 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2003, 06, 07 by Ralf Baechle (ralf@linux-mips.org) - */ -#ifndef __ASM_CMPXCHG_H -#define __ASM_CMPXCHG_H - -#include <linux/irqflags.h> - -#define __HAVE_ARCH_CMPXCHG 1 - -#define __cmpxchg_asm(ld, st, m, old, new) \ -({ \ - __typeof(*(m)) __ret; \ - \ - if (cpu_has_llsc && R10000_LLSC_WAR) { \ - __asm__ __volatile__( \ - " .set push \n" \ - " .set noat \n" \ - " .set mips3 \n" \ - "1: " ld " %0, %2 # __cmpxchg_asm \n" \ - " bne %0, %z3, 2f \n" \ - " .set mips0 \n" \ - " move $1, %z4 \n" \ - " .set mips3 \n" \ - " " st " $1, %1 \n" \ - " beqzl $1, 1b \n" \ - "2: \n" \ - " .set pop \n" \ - : "=&r" (__ret), "=R" (*m) \ - : "R" (*m), "Jr" (old), "Jr" (new) \ - : "memory"); \ - } else if (cpu_has_llsc) { \ - __asm__ __volatile__( \ - " .set push \n" \ - " .set noat \n" \ - " .set mips3 \n" \ - "1: " ld " %0, %2 # __cmpxchg_asm \n" \ - " bne %0, %z3, 2f \n" \ - " .set mips0 \n" \ - " move $1, %z4 \n" \ - " .set mips3 \n" \ - " " st " $1, %1 \n" \ - " beqz $1, 3f \n" \ - "2: \n" \ - " .subsection 2 \n" \ - "3: b 1b \n" \ - " .previous \n" \ - " .set pop \n" \ - : "=&r" (__ret), "=R" (*m) \ - : "R" (*m), "Jr" (old), "Jr" (new) \ - : "memory"); \ - } else { \ - unsigned long __flags; \ - \ - raw_local_irq_save(__flags); \ - __ret = *m; \ - if (__ret == old) \ - *m = new; \ - raw_local_irq_restore(__flags); \ - } \ - \ - __ret; \ -}) - -/* - * This function doesn't exist, so you'll get a linker error - * if something tries to do an invalid cmpxchg(). - */ -extern void __cmpxchg_called_with_bad_pointer(void); - -#define __cmpxchg(ptr, old, new, barrier) \ -({ \ - __typeof__(ptr) __ptr = (ptr); \ - __typeof__(*(ptr)) __old = (old); \ - __typeof__(*(ptr)) __new = (new); \ - __typeof__(*(ptr)) __res = 0; \ - \ - barrier; \ - \ - switch (sizeof(*(__ptr))) { \ - case 4: \ - __res = __cmpxchg_asm("ll", "sc", __ptr, __old, __new); \ - break; \ - case 8: \ - if (sizeof(long) == 8) { \ - __res = __cmpxchg_asm("lld", "scd", __ptr, \ - __old, __new); \ - break; \ - } \ - default: \ - __cmpxchg_called_with_bad_pointer(); \ - break; \ - } \ - \ - barrier; \ - \ - __res; \ -}) - -#define cmpxchg(ptr, old, new) __cmpxchg(ptr, old, new, smp_llsc_mb()) -#define cmpxchg_local(ptr, old, new) __cmpxchg(ptr, old, new, ) - -#define cmpxchg64(ptr, o, n) \ - ({ \ - BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ - cmpxchg((ptr), (o), (n)); \ - }) - -#ifdef CONFIG_64BIT -#define cmpxchg64_local(ptr, o, n) \ - ({ \ - BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ - cmpxchg_local((ptr), (o), (n)); \ - }) -#else -#include <asm-generic/cmpxchg-local.h> -#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) -#endif - -#endif /* __ASM_CMPXCHG_H */ |