diff options
Diffstat (limited to 'arch/aarch64/atomic.h')
-rw-r--r-- | arch/aarch64/atomic.h | 206 |
1 files changed, 0 insertions, 206 deletions
diff --git a/arch/aarch64/atomic.h b/arch/aarch64/atomic.h deleted file mode 100644 index e7c82c2e..00000000 --- a/arch/aarch64/atomic.h +++ /dev/null @@ -1,206 +0,0 @@ -#ifndef _INTERNAL_ATOMIC_H -#define _INTERNAL_ATOMIC_H - -#include <stdint.h> - -static inline int a_ctz_64(uint64_t x) -{ - __asm__( - " rbit %0, %1\n" - " clz %0, %0\n" - : "=r"(x) : "r"(x)); - return x; -} - -static inline int a_ctz_l(unsigned long x) -{ - return a_ctz_64(x); -} - -static inline void a_barrier() -{ - __asm__ __volatile__("dmb ish"); -} - -static inline void *a_cas_p(volatile void *p, void *t, void *s) -{ - void *old; - __asm__ __volatile__( - " dmb ish\n" - "1: ldxr %0,%3\n" - " cmp %0,%1\n" - " b.ne 1f\n" - " stxr %w0,%2,%3\n" - " cbnz %w0,1b\n" - " mov %0,%1\n" - "1: dmb ish\n" - : "=&r"(old) - : "r"(t), "r"(s), "Q"(*(long*)p) - : "memory", "cc"); - return old; -} - -static inline int a_cas(volatile int *p, int t, int s) -{ - int old; - __asm__ __volatile__( - " dmb ish\n" - "1: ldxr %w0,%3\n" - " cmp %w0,%w1\n" - " b.ne 1f\n" - " stxr %w0,%w2,%3\n" - " cbnz %w0,1b\n" - " mov %w0,%w1\n" - "1: dmb ish\n" - : "=&r"(old) - : "r"(t), "r"(s), "Q"(*p) - : "memory", "cc"); - return old; -} - -static inline int a_swap(volatile int *x, int v) -{ - int old, tmp; - __asm__ __volatile__( - " dmb ish\n" - "1: ldxr %w0,%3\n" - " stxr %w1,%w2,%3\n" - " cbnz %w1,1b\n" - " dmb ish\n" - : "=&r"(old), "=&r"(tmp) - : "r"(v), "Q"(*x) - : "memory", "cc" ); - return old; -} - -static inline int a_fetch_add(volatile int *x, int v) -{ - int old, tmp; - __asm__ __volatile__( - " dmb ish\n" - "1: ldxr %w0,%3\n" - " add %w0,%w0,%w2\n" - " stxr %w1,%w0,%3\n" - " cbnz %w1,1b\n" - " dmb ish\n" - : "=&r"(old), "=&r"(tmp) - : "r"(v), "Q"(*x) - : "memory", "cc" ); - return old-v; -} - -static inline void a_inc(volatile int *x) -{ - int tmp, tmp2; - __asm__ __volatile__( - " dmb ish\n" - "1: ldxr %w0,%2\n" - " add %w0,%w0,#1\n" - " stxr %w1,%w0,%2\n" - " cbnz %w1,1b\n" - " dmb ish\n" - : "=&r"(tmp), "=&r"(tmp2) - : "Q"(*x) - : "memory", "cc" ); -} - -static inline void a_dec(volatile int *x) -{ - int tmp, tmp2; - __asm__ __volatile__( - " dmb ish\n" - "1: ldxr %w0,%2\n" - " sub %w0,%w0,#1\n" - " stxr %w1,%w0,%2\n" - " cbnz %w1,1b\n" - " dmb ish\n" - : "=&r"(tmp), "=&r"(tmp2) - : "Q"(*x) - : "memory", "cc" ); -} - -static inline void a_and_64(volatile uint64_t *p, uint64_t v) -{ - int tmp, tmp2; - __asm__ __volatile__( - " dmb ish\n" - "1: ldxr %0,%3\n" - " and %0,%0,%2\n" - " stxr %w1,%0,%3\n" - " cbnz %w1,1b\n" - " dmb ish\n" - : "=&r"(tmp), "=&r"(tmp2) - : "r"(v), "Q"(*p) - : "memory", "cc" ); -} - -static inline void a_and(volatile int *p, int v) -{ - int tmp, tmp2; - __asm__ __volatile__( - " dmb ish\n" - "1: ldxr %w0,%3\n" - " and %w0,%w0,%w2\n" - " stxr %w1,%w0,%3\n" - " cbnz %w1,1b\n" - " dmb ish\n" - : "=&r"(tmp), "=&r"(tmp2) - : "r"(v), "Q"(*p) - : "memory", "cc" ); -} - -static inline void a_or_64(volatile uint64_t *p, uint64_t v) -{ - int tmp, tmp2; - __asm__ __volatile__( - " dmb ish\n" - "1: ldxr %0,%3\n" - " orr %0,%0,%2\n" - " stxr %w1,%0,%3\n" - " cbnz %w1,1b\n" - " dmb ish\n" - : "=&r"(tmp), "=&r"(tmp2) - : "r"(v), "Q"(*p) - : "memory", "cc" ); -} - -static inline void a_or_l(volatile void *p, long v) -{ - return a_or_64(p, v); -} - -static inline void a_or(volatile int *p, int v) -{ - int tmp, tmp2; - __asm__ __volatile__( - " dmb ish\n" - "1: ldxr %w0,%3\n" - " orr %w0,%w0,%w2\n" - " stxr %w1,%w0,%3\n" - " cbnz %w1,1b\n" - " dmb ish\n" - : "=&r"(tmp), "=&r"(tmp2) - : "r"(v), "Q"(*p) - : "memory", "cc" ); -} - -static inline void a_store(volatile int *p, int x) -{ - __asm__ __volatile__( - " dmb ish\n" - " str %w1,%0\n" - " dmb ish\n" - : "=m"(*p) - : "r"(x) - : "memory", "cc" ); -} - -#define a_spin a_barrier - -static inline void a_crash() -{ - *(volatile char *)0=0; -} - - -#endif |