diff options
Diffstat (limited to 'arch/hexagon/include/asm/atomic.h')
| -rw-r--r-- | arch/hexagon/include/asm/atomic.h | 95 |
1 files changed, 21 insertions, 74 deletions
diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h index 12cd9231c4b8..2447d083c432 100644 --- a/arch/hexagon/include/asm/atomic.h +++ b/arch/hexagon/include/asm/atomic.h @@ -12,11 +12,9 @@ #include <asm/cmpxchg.h> #include <asm/barrier.h> -#define ATOMIC_INIT(i) { (i) } - /* Normal writes in our arch don't clear lock reservations */ -static inline void atomic_set(atomic_t *v, int new) +static inline void arch_atomic_set(atomic_t *v, int new) { asm volatile( "1: r6 = memw_locked(%0);\n" @@ -28,62 +26,12 @@ static inline void atomic_set(atomic_t *v, int new) ); } -#define atomic_set_release(v, i) atomic_set((v), (i)) - -/** - * atomic_read - reads a word, atomically - * @v: pointer to atomic value - * - * Assumes all word reads on our architecture are atomic. - */ -#define atomic_read(v) READ_ONCE((v)->counter) - -/** - * atomic_xchg - atomic - * @v: pointer to memory to change - * @new: new value (technically passed in a register -- see xchg) - */ -#define atomic_xchg(v, new) (xchg(&((v)->counter), (new))) - +#define arch_atomic_set_release(v, i) arch_atomic_set((v), (i)) -/** - * atomic_cmpxchg - atomic compare-and-exchange values - * @v: pointer to value to change - * @old: desired old value to match - * @new: new value to put in - * - * Parameters are then pointer, value-in-register, value-in-register, - * and the output is the old value. - * - * Apparently this is complicated for archs that don't support - * the memw_locked like we do (or it's broken or whatever). - * - * Kind of the lynchpin of the rest of the generically defined routines. - * Remember V2 had that bug with dotnew predicate set by memw_locked. - * - * "old" is "expected" old val, __oldval is actual old value - */ -static inline int atomic_cmpxchg(atomic_t *v, int old, int new) -{ - int __oldval; - - asm volatile( - "1: %0 = memw_locked(%1);\n" - " { P0 = cmp.eq(%0,%2);\n" - " if (!P0.new) jump:nt 2f; }\n" - " memw_locked(%1,P0) = %3;\n" - " if (!P0) jump 1b;\n" - "2:\n" - : "=&r" (__oldval) - : "r" (&v->counter), "r" (old), "r" (new) - : "memory", "p0" - ); - - return __oldval; -} +#define arch_atomic_read(v) READ_ONCE((v)->counter) #define ATOMIC_OP(op) \ -static inline void atomic_##op(int i, atomic_t *v) \ +static inline void arch_atomic_##op(int i, atomic_t *v) \ { \ int output; \ \ @@ -91,7 +39,7 @@ static inline void atomic_##op(int i, atomic_t *v) \ "1: %0 = memw_locked(%1);\n" \ " %0 = "#op "(%0,%2);\n" \ " memw_locked(%1,P3)=%0;\n" \ - " if !P3 jump 1b;\n" \ + " if (!P3) jump 1b;\n" \ : "=&r" (output) \ : "r" (&v->counter), "r" (i) \ : "memory", "p3" \ @@ -99,7 +47,7 @@ static inline void atomic_##op(int i, atomic_t *v) \ } \ #define ATOMIC_OP_RETURN(op) \ -static inline int atomic_##op##_return(int i, atomic_t *v) \ +static inline int arch_atomic_##op##_return(int i, atomic_t *v) \ { \ int output; \ \ @@ -107,7 +55,7 @@ static inline int atomic_##op##_return(int i, atomic_t *v) \ "1: %0 = memw_locked(%1);\n" \ " %0 = "#op "(%0,%2);\n" \ " memw_locked(%1,P3)=%0;\n" \ - " if !P3 jump 1b;\n" \ + " if (!P3) jump 1b;\n" \ : "=&r" (output) \ : "r" (&v->counter), "r" (i) \ : "memory", "p3" \ @@ -116,7 +64,7 @@ static inline int atomic_##op##_return(int i, atomic_t *v) \ } #define ATOMIC_FETCH_OP(op) \ -static inline int atomic_fetch_##op(int i, atomic_t *v) \ +static inline int arch_atomic_fetch_##op(int i, atomic_t *v) \ { \ int output, val; \ \ @@ -124,7 +72,7 @@ static inline int atomic_fetch_##op(int i, atomic_t *v) \ "1: %0 = memw_locked(%2);\n" \ " %1 = "#op "(%0,%3);\n" \ " memw_locked(%2,P3)=%1;\n" \ - " if !P3 jump 1b;\n" \ + " if (!P3) jump 1b;\n" \ : "=&r" (output), "=&r" (val) \ : "r" (&v->counter), "r" (i) \ : "memory", "p3" \ @@ -137,6 +85,11 @@ static inline int atomic_fetch_##op(int i, atomic_t *v) \ ATOMIC_OPS(add) ATOMIC_OPS(sub) +#define arch_atomic_add_return arch_atomic_add_return +#define arch_atomic_sub_return arch_atomic_sub_return +#define arch_atomic_fetch_add arch_atomic_fetch_add +#define arch_atomic_fetch_sub arch_atomic_fetch_sub + #undef ATOMIC_OPS #define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op) @@ -144,22 +97,16 @@ ATOMIC_OPS(and) ATOMIC_OPS(or) ATOMIC_OPS(xor) +#define arch_atomic_fetch_and arch_atomic_fetch_and +#define arch_atomic_fetch_or arch_atomic_fetch_or +#define arch_atomic_fetch_xor arch_atomic_fetch_xor + #undef ATOMIC_OPS #undef ATOMIC_FETCH_OP #undef ATOMIC_OP_RETURN #undef ATOMIC_OP -/** - * atomic_fetch_add_unless - add unless the number is a given value - * @v: pointer to value - * @a: amount to add - * @u: unless value is equal to u - * - * Returns old value. - * - */ - -static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u) +static inline int arch_atomic_fetch_add_unless(atomic_t *v, int a, int u) { int __oldval; register int tmp; @@ -173,7 +120,7 @@ static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u) " }" " memw_locked(%2, p3) = %1;" " {" - " if !p3 jump 1b;" + " if (!p3) jump 1b;" " }" "2:" : "=&r" (__oldval), "=&r" (tmp) @@ -182,6 +129,6 @@ static inline int atomic_fetch_add_unless(atomic_t *v, int a, int u) ); return __oldval; } -#define atomic_fetch_add_unless atomic_fetch_add_unless +#define arch_atomic_fetch_add_unless arch_atomic_fetch_add_unless #endif |