diff options
Diffstat (limited to 'arch/loongarch/include/asm/local.h')
| -rw-r--r-- | arch/loongarch/include/asm/local.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/local.h b/arch/loongarch/include/asm/local.h index f53ea653af76..2d118b1a060e 100644 --- a/arch/loongarch/include/asm/local.h +++ b/arch/loongarch/include/asm/local.h @@ -8,6 +8,7 @@ #include <linux/percpu.h> #include <linux/bitops.h> #include <linux/atomic.h> +#include <asm/asm.h> #include <asm/cmpxchg.h> typedef struct { @@ -27,6 +28,7 @@ typedef struct { /* * Same as above, but return the result value */ +#ifdef CONFIG_CPU_HAS_AMO static inline long local_add_return(long i, local_t *l) { unsigned long result; @@ -55,6 +57,41 @@ static inline long local_sub_return(long i, local_t *l) return result; } +#else +static inline long local_add_return(long i, local_t *l) +{ + unsigned long result, temp; + + __asm__ __volatile__( + "1:" __LL "%1, %2 # local_add_return \n" + __stringify(LONG_ADD) " %0, %1, %3 \n" + __SC "%0, %2 \n" + " beq %0, $r0, 1b \n" + __stringify(LONG_ADD) " %0, %1, %3 \n" + : "=&r" (result), "=&r" (temp), "=ZC" (l->a.counter) + : "r" (i), "ZC" (l->a.counter) + : "memory"); + + return result; +} + +static inline long local_sub_return(long i, local_t *l) +{ + unsigned long result, temp; + + __asm__ __volatile__( + "1:" __LL "%1, %2 # local_sub_return \n" + __stringify(LONG_SUB) " %0, %1, %3 \n" + __SC "%0, %2 \n" + " beq %0, $r0, 1b \n" + __stringify(LONG_SUB) " %0, %1, %3 \n" + : "=&r" (result), "=&r" (temp), "=ZC" (l->a.counter) + : "r" (i), "ZC" (l->a.counter) + : "memory"); + + return result; +} +#endif static inline long local_cmpxchg(local_t *l, long old, long new) { |