diff options
Diffstat (limited to 'include/asm-powerpc/atomic.h')
| -rw-r--r-- | include/asm-powerpc/atomic.h | 479 |
1 files changed, 0 insertions, 479 deletions
diff --git a/include/asm-powerpc/atomic.h b/include/asm-powerpc/atomic.h deleted file mode 100644 index f3fc733..0000000 --- a/include/asm-powerpc/atomic.h +++ /dev/null @@ -1,479 +0,0 @@ -#ifndef _ASM_POWERPC_ATOMIC_H_ -#define _ASM_POWERPC_ATOMIC_H_ - -/* - * PowerPC atomic operations - */ - -typedef struct { int counter; } atomic_t; - -#ifdef __KERNEL__ -#include <linux/compiler.h> -#include <asm/synch.h> -#include <asm/asm-compat.h> -#include <asm/system.h> - -#define ATOMIC_INIT(i) { (i) } - -static __inline__ int atomic_read(const atomic_t *v) -{ - int t; - - __asm__ __volatile__("lwz%U1%X1 %0,%1" : "=r"(t) : "m"(v->counter)); - - return t; -} - -static __inline__ void atomic_set(atomic_t *v, int i) -{ - __asm__ __volatile__("stw%U0%X0 %1,%0" : "=m"(v->counter) : "r"(i)); -} - -static __inline__ void atomic_add(int a, atomic_t *v) -{ - int t; - - __asm__ __volatile__( -"1: lwarx %0,0,%3 # atomic_add\n\ - add %0,%2,%0\n" - PPC405_ERR77(0,%3) -" stwcx. %0,0,%3 \n\ - bne- 1b" - : "=&r" (t), "+m" (v->counter) - : "r" (a), "r" (&v->counter) - : "cc"); -} - -static __inline__ int atomic_add_return(int a, atomic_t *v) -{ - int t; - - __asm__ __volatile__( - LWSYNC_ON_SMP -"1: lwarx %0,0,%2 # atomic_add_return\n\ - add %0,%1,%0\n" - PPC405_ERR77(0,%2) -" stwcx. %0,0,%2 \n\ - bne- 1b" - ISYNC_ON_SMP - : "=&r" (t) - : "r" (a), "r" (&v->counter) - : "cc", "memory"); - - return t; -} - -#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0) - -static __inline__ void atomic_sub(int a, atomic_t *v) -{ - int t; - - __asm__ __volatile__( -"1: lwarx %0,0,%3 # atomic_sub\n\ - subf %0,%2,%0\n" - PPC405_ERR77(0,%3) -" stwcx. %0,0,%3 \n\ - bne- 1b" - : "=&r" (t), "+m" (v->counter) - : "r" (a), "r" (&v->counter) - : "cc"); -} - -static __inline__ int atomic_sub_return(int a, atomic_t *v) -{ - int t; - - __asm__ __volatile__( - LWSYNC_ON_SMP -"1: lwarx %0,0,%2 # atomic_sub_return\n\ - subf %0,%1,%0\n" - PPC405_ERR77(0,%2) -" stwcx. %0,0,%2 \n\ - bne- 1b" - ISYNC_ON_SMP - : "=&r" (t) - : "r" (a), "r" (&v->counter) - : "cc", "memory"); - - return t; -} - -static __inline__ void atomic_inc(atomic_t *v) -{ - int t; - - __asm__ __volatile__( -"1: lwarx %0,0,%2 # atomic_inc\n\ - addic %0,%0,1\n" - PPC405_ERR77(0,%2) -" stwcx. %0,0,%2 \n\ - bne- 1b" - : "=&r" (t), "+m" (v->counter) - : "r" (&v->counter) - : "cc"); -} - -static __inline__ int atomic_inc_return(atomic_t *v) -{ - int t; - - __asm__ __volatile__( - LWSYNC_ON_SMP -"1: lwarx %0,0,%1 # atomic_inc_return\n\ - addic %0,%0,1\n" - PPC405_ERR77(0,%1) -" stwcx. %0,0,%1 \n\ - bne- 1b" - ISYNC_ON_SMP - : "=&r" (t) - : "r" (&v->counter) - : "cc", "memory"); - - return t; -} - -/* - * atomic_inc_and_test - increment and test - * @v: pointer of type atomic_t - * - * Atomically increments @v by 1 - * and returns true if the result is zero, or false for all - * other cases. - */ -#define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) - -static __inline__ void atomic_dec(atomic_t *v) -{ - int t; - - __asm__ __volatile__( -"1: lwarx %0,0,%2 # atomic_dec\n\ - addic %0,%0,-1\n" - PPC405_ERR77(0,%2)\ -" stwcx. %0,0,%2\n\ - bne- 1b" - : "=&r" (t), "+m" (v->counter) - : "r" (&v->counter) - : "cc"); -} - -static __inline__ int atomic_dec_return(atomic_t *v) -{ - int t; - - __asm__ __volatile__( - LWSYNC_ON_SMP -"1: lwarx %0,0,%1 # atomic_dec_return\n\ - addic %0,%0,-1\n" - PPC405_ERR77(0,%1) -" stwcx. %0,0,%1\n\ - bne- 1b" - ISYNC_ON_SMP - : "=&r" (t) - : "r" (&v->counter) - : "cc", "memory"); - - return t; -} - -#define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) -#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) - -/** - * atomic_add_unless - add unless the number is a given value - * @v: pointer of type atomic_t - * @a: the amount to add to v... - * @u: ...unless v is equal to u. - * - * Atomically adds @a to @v, so long as it was not @u. - * Returns non-zero if @v was not @u, and zero otherwise. - */ -static __inline__ int atomic_add_unless(atomic_t *v, int a, int u) -{ - int t; - - __asm__ __volatile__ ( - LWSYNC_ON_SMP -"1: lwarx %0,0,%1 # atomic_add_unless\n\ - cmpw 0,%0,%3 \n\ - beq- 2f \n\ - add %0,%2,%0 \n" - PPC405_ERR77(0,%2) -" stwcx. %0,0,%1 \n\ - bne- 1b \n" - ISYNC_ON_SMP -" subf %0,%2,%0 \n\ -2:" - : "=&r" (t) - : "r" (&v->counter), "r" (a), "r" (u) - : "cc", "memory"); - - return t != u; -} - -#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) - -#define atomic_sub_and_test(a, v) (atomic_sub_return((a), (v)) == 0) -#define atomic_dec_and_test(v) (atomic_dec_return((v)) == 0) - -/* - * Atomically test *v and decrement if it is greater than 0. - * The function returns the old value of *v minus 1, even if - * the atomic variable, v, was not decremented. - */ -static __inline__ int atomic_dec_if_positive(atomic_t *v) -{ - int t; - - __asm__ __volatile__( - LWSYNC_ON_SMP -"1: lwarx %0,0,%1 # atomic_dec_if_positive\n\ - cmpwi %0,1\n\ - addi %0,%0,-1\n\ - blt- 2f\n" - PPC405_ERR77(0,%1) -" stwcx. %0,0,%1\n\ - bne- 1b" - ISYNC_ON_SMP - "\n\ -2:" : "=&b" (t) - : "r" (&v->counter) - : "cc", "memory"); - - return t; -} - -#define smp_mb__before_atomic_dec() smp_mb() -#define smp_mb__after_atomic_dec() smp_mb() -#define smp_mb__before_atomic_inc() smp_mb() -#define smp_mb__after_atomic_inc() smp_mb() - -#ifdef __powerpc64__ - -typedef struct { long counter; } atomic64_t; - -#define ATOMIC64_INIT(i) { (i) } - -static __inline__ long atomic64_read(const atomic64_t *v) -{ - long t; - - __asm__ __volatile__("ld%U1%X1 %0,%1" : "=r"(t) : "m"(v->counter)); - - return t; -} - -static __inline__ void atomic64_set(atomic64_t *v, long i) -{ - __asm__ __volatile__("std%U0%X0 %1,%0" : "=m"(v->counter) : "r"(i)); -} - -static __inline__ void atomic64_add(long a, atomic64_t *v) -{ - long t; - - __asm__ __volatile__( -"1: ldarx %0,0,%3 # atomic64_add\n\ - add %0,%2,%0\n\ - stdcx. %0,0,%3 \n\ - bne- 1b" - : "=&r" (t), "+m" (v->counter) - : "r" (a), "r" (&v->counter) - : "cc"); -} - -static __inline__ long atomic64_add_return(long a, atomic64_t *v) -{ - long t; - - __asm__ __volatile__( - LWSYNC_ON_SMP -"1: ldarx %0,0,%2 # atomic64_add_return\n\ - add %0,%1,%0\n\ - stdcx. %0,0,%2 \n\ - bne- 1b" - ISYNC_ON_SMP - : "=&r" (t) - : "r" (a), "r" (&v->counter) - : "cc", "memory"); - - return t; -} - -#define atomic64_add_negative(a, v) (atomic64_add_return((a), (v)) < 0) - -static __inline__ void atomic64_sub(long a, atomic64_t *v) -{ - long t; - - __asm__ __volatile__( -"1: ldarx %0,0,%3 # atomic64_sub\n\ - subf %0,%2,%0\n\ - stdcx. %0,0,%3 \n\ - bne- 1b" - : "=&r" (t), "+m" (v->counter) - : "r" (a), "r" (&v->counter) - : "cc"); -} - -static __inline__ long atomic64_sub_return(long a, atomic64_t *v) -{ - long t; - - __asm__ __volatile__( - LWSYNC_ON_SMP -"1: ldarx %0,0,%2 # atomic64_sub_return\n\ - subf %0,%1,%0\n\ - stdcx. %0,0,%2 \n\ - bne- 1b" - ISYNC_ON_SMP - : "=&r" (t) - : "r" (a), "r" (&v->counter) - : "cc", "memory"); - - return t; -} - -static __inline__ void atomic64_inc(atomic64_t *v) -{ - long t; - - __asm__ __volatile__( -"1: ldarx %0,0,%2 # atomic64_inc\n\ - addic %0,%0,1\n\ - stdcx. %0,0,%2 \n\ - bne- 1b" - : "=&r" (t), "+m" (v->counter) - : "r" (&v->counter) - : "cc"); -} - -static __inline__ long atomic64_inc_return(atomic64_t *v) -{ - long t; - - __asm__ __volatile__( - LWSYNC_ON_SMP -"1: ldarx %0,0,%1 # atomic64_inc_return\n\ - addic %0,%0,1\n\ - stdcx. %0,0,%1 \n\ - bne- 1b" - ISYNC_ON_SMP - : "=&r" (t) - : "r" (&v->counter) - : "cc", "memory"); - - return t; -} - -/* - * atomic64_inc_and_test - increment and test - * @v: pointer of type atomic64_t - * - * Atomically increments @v by 1 - * and returns true if the result is zero, or false for all - * other cases. - */ -#define atomic64_inc_and_test(v) (atomic64_inc_return(v) == 0) - -static __inline__ void atomic64_dec(atomic64_t *v) -{ - long t; - - __asm__ __volatile__( -"1: ldarx %0,0,%2 # atomic64_dec\n\ - addic %0,%0,-1\n\ - stdcx. %0,0,%2\n\ - bne- 1b" - : "=&r" (t), "+m" (v->counter) - : "r" (&v->counter) - : "cc"); -} - -static __inline__ long atomic64_dec_return(atomic64_t *v) -{ - long t; - - __asm__ __volatile__( - LWSYNC_ON_SMP -"1: ldarx %0,0,%1 # atomic64_dec_return\n\ - addic %0,%0,-1\n\ - stdcx. %0,0,%1\n\ - bne- 1b" - ISYNC_ON_SMP - : "=&r" (t) - : "r" (&v->counter) - : "cc", "memory"); - - return t; -} - -#define atomic64_sub_and_test(a, v) (atomic64_sub_return((a), (v)) == 0) -#define atomic64_dec_and_test(v) (atomic64_dec_return((v)) == 0) - -/* - * Atomically test *v and decrement if it is greater than 0. - * The function returns the old value of *v minus 1. - */ -static __inline__ long atomic64_dec_if_positive(atomic64_t *v) -{ - long t; - - __asm__ __volatile__( - LWSYNC_ON_SMP -"1: ldarx %0,0,%1 # atomic64_dec_if_positive\n\ - addic. %0,%0,-1\n\ - blt- 2f\n\ - stdcx. %0,0,%1\n\ - bne- 1b" - ISYNC_ON_SMP - "\n\ -2:" : "=&r" (t) - : "r" (&v->counter) - : "cc", "memory"); - - return t; -} - -#define atomic64_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) -#define atomic64_xchg(v, new) (xchg(&((v)->counter), new)) - -/** - * atomic64_add_unless - add unless the number is a given value - * @v: pointer of type atomic64_t - * @a: the amount to add to v... - * @u: ...unless v is equal to u. - * - * Atomically adds @a to @v, so long as it was not @u. - * Returns non-zero if @v was not @u, and zero otherwise. - */ -static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u) -{ - long t; - - __asm__ __volatile__ ( - LWSYNC_ON_SMP -"1: ldarx %0,0,%1 # atomic_add_unless\n\ - cmpd 0,%0,%3 \n\ - beq- 2f \n\ - add %0,%2,%0 \n" -" stdcx. %0,0,%1 \n\ - bne- 1b \n" - ISYNC_ON_SMP -" subf %0,%2,%0 \n\ -2:" - : "=&r" (t) - : "r" (&v->counter), "r" (a), "r" (u) - : "cc", "memory"); - - return t != u; -} - -#define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) - -#endif /* __powerpc64__ */ - -#include <asm-generic/atomic.h> -#endif /* __KERNEL__ */ -#endif /* _ASM_POWERPC_ATOMIC_H_ */ |