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Diffstat (limited to 'ANDROID_3.4.5/arch/mips/include/asm/cmpxchg.h')
-rw-r--r--ANDROID_3.4.5/arch/mips/include/asm/cmpxchg.h245
1 files changed, 0 insertions, 245 deletions
diff --git a/ANDROID_3.4.5/arch/mips/include/asm/cmpxchg.h b/ANDROID_3.4.5/arch/mips/include/asm/cmpxchg.h
deleted file mode 100644
index 285a41fa..00000000
--- a/ANDROID_3.4.5/arch/mips/include/asm/cmpxchg.h
+++ /dev/null
@@ -1,245 +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>
-#include <asm/war.h>
-
-static inline unsigned long __xchg_u32(volatile int * m, unsigned int val)
-{
- __u32 retval;
-
- smp_mb__before_llsc();
-
- if (kernel_uses_llsc && R10000_LLSC_WAR) {
- unsigned long dummy;
-
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: ll %0, %3 # xchg_u32 \n"
- " .set mips0 \n"
- " move %2, %z4 \n"
- " .set mips3 \n"
- " sc %2, %1 \n"
- " beqzl %2, 1b \n"
- " .set mips0 \n"
- : "=&r" (retval), "=m" (*m), "=&r" (dummy)
- : "R" (*m), "Jr" (val)
- : "memory");
- } else if (kernel_uses_llsc) {
- unsigned long dummy;
-
- do {
- __asm__ __volatile__(
- " .set mips3 \n"
- " ll %0, %3 # xchg_u32 \n"
- " .set mips0 \n"
- " move %2, %z4 \n"
- " .set mips3 \n"
- " sc %2, %1 \n"
- " .set mips0 \n"
- : "=&r" (retval), "=m" (*m), "=&r" (dummy)
- : "R" (*m), "Jr" (val)
- : "memory");
- } while (unlikely(!dummy));
- } else {
- unsigned long flags;
-
- raw_local_irq_save(flags);
- retval = *m;
- *m = val;
- raw_local_irq_restore(flags); /* implies memory barrier */
- }
-
- smp_llsc_mb();
-
- return retval;
-}
-
-#ifdef CONFIG_64BIT
-static inline __u64 __xchg_u64(volatile __u64 * m, __u64 val)
-{
- __u64 retval;
-
- smp_mb__before_llsc();
-
- if (kernel_uses_llsc && R10000_LLSC_WAR) {
- unsigned long dummy;
-
- __asm__ __volatile__(
- " .set mips3 \n"
- "1: lld %0, %3 # xchg_u64 \n"
- " move %2, %z4 \n"
- " scd %2, %1 \n"
- " beqzl %2, 1b \n"
- " .set mips0 \n"
- : "=&r" (retval), "=m" (*m), "=&r" (dummy)
- : "R" (*m), "Jr" (val)
- : "memory");
- } else if (kernel_uses_llsc) {
- unsigned long dummy;
-
- do {
- __asm__ __volatile__(
- " .set mips3 \n"
- " lld %0, %3 # xchg_u64 \n"
- " move %2, %z4 \n"
- " scd %2, %1 \n"
- " .set mips0 \n"
- : "=&r" (retval), "=m" (*m), "=&r" (dummy)
- : "R" (*m), "Jr" (val)
- : "memory");
- } while (unlikely(!dummy));
- } else {
- unsigned long flags;
-
- raw_local_irq_save(flags);
- retval = *m;
- *m = val;
- raw_local_irq_restore(flags); /* implies memory barrier */
- }
-
- smp_llsc_mb();
-
- return retval;
-}
-#else
-extern __u64 __xchg_u64_unsupported_on_32bit_kernels(volatile __u64 * m, __u64 val);
-#define __xchg_u64 __xchg_u64_unsupported_on_32bit_kernels
-#endif
-
-static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
-{
- switch (size) {
- case 4:
- return __xchg_u32(ptr, x);
- case 8:
- return __xchg_u64(ptr, x);
- }
-
- return x;
-}
-
-#define xchg(ptr, x) \
-({ \
- BUILD_BUG_ON(sizeof(*(ptr)) & ~0xc); \
- \
- ((__typeof__(*(ptr))) \
- __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))); \
-})
-
-#define __HAVE_ARCH_CMPXCHG 1
-
-#define __cmpxchg_asm(ld, st, m, old, new) \
-({ \
- __typeof(*(m)) __ret; \
- \
- if (kernel_uses_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 (kernel_uses_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, 1b \n" \
- " .set pop \n" \
- "2: \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, pre_barrier, post_barrier) \
-({ \
- __typeof__(ptr) __ptr = (ptr); \
- __typeof__(*(ptr)) __old = (old); \
- __typeof__(*(ptr)) __new = (new); \
- __typeof__(*(ptr)) __res = 0; \
- \
- pre_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; \
- } \
- \
- post_barrier; \
- \
- __res; \
-})
-
-#define cmpxchg(ptr, old, new) __cmpxchg(ptr, old, new, smp_mb__before_llsc(), 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 */
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