^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef _ALPHA_LOCAL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define _ALPHA_LOCAL_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/percpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) typedef struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) atomic_long_t a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) } local_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define local_read(l) atomic_long_read(&(l)->a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define local_set(l,i) atomic_long_set(&(l)->a, (i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define local_inc(l) atomic_long_inc(&(l)->a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define local_dec(l) atomic_long_dec(&(l)->a)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define local_add(i,l) atomic_long_add((i),(&(l)->a))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define local_sub(i,l) atomic_long_sub((i),(&(l)->a))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static __inline__ long local_add_return(long i, local_t * l)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) long temp, result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) __asm__ __volatile__(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) "1: ldq_l %0,%1\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) " addq %0,%3,%2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) " addq %0,%3,%0\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) " stq_c %0,%1\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) " beq %0,2f\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) ".subsection 2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) "2: br 1b\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) ".previous"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) :"=&r" (temp), "=m" (l->a.counter), "=&r" (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) :"Ir" (i), "m" (l->a.counter) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static __inline__ long local_sub_return(long i, local_t * l)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) long temp, result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) __asm__ __volatile__(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) "1: ldq_l %0,%1\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) " subq %0,%3,%2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) " subq %0,%3,%0\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) " stq_c %0,%1\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) " beq %0,2f\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) ".subsection 2\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) "2: br 1b\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) ".previous"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) :"=&r" (temp), "=m" (l->a.counter), "=&r" (result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) :"Ir" (i), "m" (l->a.counter) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return result;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define local_cmpxchg(l, o, n) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) (cmpxchg_local(&((l)->a.counter), (o), (n)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define local_xchg(l, n) (xchg_local(&((l)->a.counter), (n)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * local_add_unless - add unless the number is a given value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) * @l: pointer of type local_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * @a: the amount to add to l...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * @u: ...unless l is equal to u.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) * Atomically adds @a to @l, so long as it was not @u.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) * Returns non-zero if @l was not @u, and zero otherwise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define local_add_unless(l, a, u) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) ({ \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) long c, old; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) c = local_read(l); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) for (;;) { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (unlikely(c == (u))) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) break; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) old = local_cmpxchg((l), c, c + (a)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (likely(old == c)) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) break; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) c = old; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) } \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) c != (u); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) })
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define local_inc_not_zero(l) local_add_unless((l), 1, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define local_add_negative(a, l) (local_add_return((a), (l)) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define local_dec_return(l) local_sub_return(1,(l))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define local_inc_return(l) local_add_return(1,(l))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #define local_sub_and_test(i,l) (local_sub_return((i), (l)) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) #define local_inc_and_test(l) (local_add_return(1, (l)) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #define local_dec_and_test(l) (local_sub_return(1, (l)) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* Verify if faster than atomic ops */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #define __local_inc(l) ((l)->a.counter++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #define __local_dec(l) ((l)->a.counter++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #define __local_add(i,l) ((l)->a.counter+=(i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #define __local_sub(i,l) ((l)->a.counter-=(i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #endif /* _ALPHA_LOCAL_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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