Commit f43f7b46 authored by Mathieu Desnoyers's avatar Mathieu Desnoyers Committed by Linus Torvalds

local_t: alpha extension

Signed-off-by: default avatarMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5e97b930
......@@ -4,37 +4,115 @@
#include <linux/percpu.h>
#include <asm/atomic.h>
typedef atomic64_t local_t;
typedef struct
{
atomic_long_t a;
} local_t;
#define LOCAL_INIT(i) ATOMIC64_INIT(i)
#define local_read(v) atomic64_read(v)
#define local_set(v,i) atomic64_set(v,i)
#define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) }
#define local_read(l) atomic_long_read(&(l)->a)
#define local_set(l,i) atomic_long_set(&(l)->a, (i))
#define local_inc(l) atomic_long_inc(&(l)->a)
#define local_dec(l) atomic_long_dec(&(l)->a)
#define local_add(i,l) atomic_long_add((i),(&(l)->a))
#define local_sub(i,l) atomic_long_sub((i),(&(l)->a))
#define local_inc(v) atomic64_inc(v)
#define local_dec(v) atomic64_dec(v)
#define local_add(i, v) atomic64_add(i, v)
#define local_sub(i, v) atomic64_sub(i, v)
static __inline__ long local_add_return(long i, local_t * l)
{
long temp, result;
__asm__ __volatile__(
"1: ldq_l %0,%1\n"
" addq %0,%3,%2\n"
" addq %0,%3,%0\n"
" stq_c %0,%1\n"
" beq %0,2f\n"
".subsection 2\n"
"2: br 1b\n"
".previous"
:"=&r" (temp), "=m" (l->a.counter), "=&r" (result)
:"Ir" (i), "m" (l->a.counter) : "memory");
return result;
}
#define __local_inc(v) ((v)->counter++)
#define __local_dec(v) ((v)->counter++)
#define __local_add(i,v) ((v)->counter+=(i))
#define __local_sub(i,v) ((v)->counter-=(i))
static __inline__ long local_sub_return(long i, local_t * l)
{
long temp, result;
__asm__ __volatile__(
"1: ldq_l %0,%1\n"
" subq %0,%3,%2\n"
" subq %0,%3,%0\n"
" stq_c %0,%1\n"
" beq %0,2f\n"
".subsection 2\n"
"2: br 1b\n"
".previous"
:"=&r" (temp), "=m" (l->a.counter), "=&r" (result)
:"Ir" (i), "m" (l->a.counter) : "memory");
return result;
}
#define local_cmpxchg(l, o, n) \
(cmpxchg_local(&((l)->a.counter), (o), (n)))
#define local_xchg(l, n) (xchg_local(&((l)->a.counter), (n)))
/**
* local_add_unless - add unless the number is a given value
* @l: pointer of type local_t
* @a: the amount to add to l...
* @u: ...unless l is equal to u.
*
* Atomically adds @a to @l, so long as it was not @u.
* Returns non-zero if @l was not @u, and zero otherwise.
*/
#define local_add_unless(l, a, u) \
({ \
long c, old; \
c = local_read(l); \
for (;;) { \
if (unlikely(c == (u))) \
break; \
old = local_cmpxchg((l), c, c + (a)); \
if (likely(old == c)) \
break; \
c = old; \
} \
c != (u); \
})
#define local_inc_not_zero(l) local_add_unless((l), 1, 0)
#define local_add_negative(a, l) (local_add_return((a), (l)) < 0)
#define local_dec_return(l) local_sub_return(1,(l))
#define local_inc_return(l) local_add_return(1,(l))
#define local_sub_and_test(i,l) (local_sub_return((i), (l)) == 0)
#define local_inc_and_test(l) (local_add_return(1, (l)) == 0)
#define local_dec_and_test(l) (local_sub_return(1, (l)) == 0)
/* Verify if faster than atomic ops */
#define __local_inc(l) ((l)->a.counter++)
#define __local_dec(l) ((l)->a.counter++)
#define __local_add(i,l) ((l)->a.counter+=(i))
#define __local_sub(i,l) ((l)->a.counter-=(i))
/* Use these for per-cpu local_t variables: on some archs they are
* much more efficient than these naive implementations. Note they take
* a variable, not an address.
*/
#define cpu_local_read(v) local_read(&__get_cpu_var(v))
#define cpu_local_set(v, i) local_set(&__get_cpu_var(v), (i))
#define cpu_local_inc(v) local_inc(&__get_cpu_var(v))
#define cpu_local_dec(v) local_dec(&__get_cpu_var(v))
#define cpu_local_add(i, v) local_add((i), &__get_cpu_var(v))
#define cpu_local_sub(i, v) local_sub((i), &__get_cpu_var(v))
#define __cpu_local_inc(v) __local_inc(&__get_cpu_var(v))
#define __cpu_local_dec(v) __local_dec(&__get_cpu_var(v))
#define __cpu_local_add(i, v) __local_add((i), &__get_cpu_var(v))
#define __cpu_local_sub(i, v) __local_sub((i), &__get_cpu_var(v))
#define cpu_local_read(l) local_read(&__get_cpu_var(l))
#define cpu_local_set(l, i) local_set(&__get_cpu_var(l), (i))
#define cpu_local_inc(l) local_inc(&__get_cpu_var(l))
#define cpu_local_dec(l) local_dec(&__get_cpu_var(l))
#define cpu_local_add(i, l) local_add((i), &__get_cpu_var(l))
#define cpu_local_sub(i, l) local_sub((i), &__get_cpu_var(l))
#define __cpu_local_inc(l) __local_inc(&__get_cpu_var(l))
#define __cpu_local_dec(l) __local_dec(&__get_cpu_var(l))
#define __cpu_local_add(i, l) __local_add((i), &__get_cpu_var(l))
#define __cpu_local_sub(i, l) __local_sub((i), &__get_cpu_var(l))
#endif /* _ALPHA_LOCAL_H */
......@@ -443,6 +443,111 @@ extern void __xchg_called_with_bad_pointer(void);
(__typeof__(*(ptr))) __xchg((ptr), (unsigned long)_x_, sizeof(*(ptr))); \
})
static inline unsigned long
__xchg_u8_local(volatile char *m, unsigned long val)
{
unsigned long ret, tmp, addr64;
__asm__ __volatile__(
" andnot %4,7,%3\n"
" insbl %1,%4,%1\n"
"1: ldq_l %2,0(%3)\n"
" extbl %2,%4,%0\n"
" mskbl %2,%4,%2\n"
" or %1,%2,%2\n"
" stq_c %2,0(%3)\n"
" beq %2,2f\n"
".subsection 2\n"
"2: br 1b\n"
".previous"
: "=&r" (ret), "=&r" (val), "=&r" (tmp), "=&r" (addr64)
: "r" ((long)m), "1" (val) : "memory");
return ret;
}
static inline unsigned long
__xchg_u16_local(volatile short *m, unsigned long val)
{
unsigned long ret, tmp, addr64;
__asm__ __volatile__(
" andnot %4,7,%3\n"
" inswl %1,%4,%1\n"
"1: ldq_l %2,0(%3)\n"
" extwl %2,%4,%0\n"
" mskwl %2,%4,%2\n"
" or %1,%2,%2\n"
" stq_c %2,0(%3)\n"
" beq %2,2f\n"
".subsection 2\n"
"2: br 1b\n"
".previous"
: "=&r" (ret), "=&r" (val), "=&r" (tmp), "=&r" (addr64)
: "r" ((long)m), "1" (val) : "memory");
return ret;
}
static inline unsigned long
__xchg_u32_local(volatile int *m, unsigned long val)
{
unsigned long dummy;
__asm__ __volatile__(
"1: ldl_l %0,%4\n"
" bis $31,%3,%1\n"
" stl_c %1,%2\n"
" beq %1,2f\n"
".subsection 2\n"
"2: br 1b\n"
".previous"
: "=&r" (val), "=&r" (dummy), "=m" (*m)
: "rI" (val), "m" (*m) : "memory");
return val;
}
static inline unsigned long
__xchg_u64_local(volatile long *m, unsigned long val)
{
unsigned long dummy;
__asm__ __volatile__(
"1: ldq_l %0,%4\n"
" bis $31,%3,%1\n"
" stq_c %1,%2\n"
" beq %1,2f\n"
".subsection 2\n"
"2: br 1b\n"
".previous"
: "=&r" (val), "=&r" (dummy), "=m" (*m)
: "rI" (val), "m" (*m) : "memory");
return val;
}
#define __xchg_local(ptr, x, size) \
({ \
unsigned long __xchg__res; \
volatile void *__xchg__ptr = (ptr); \
switch (size) { \
case 1: __xchg__res = __xchg_u8_local(__xchg__ptr, x); break; \
case 2: __xchg__res = __xchg_u16_local(__xchg__ptr, x); break; \
case 4: __xchg__res = __xchg_u32_local(__xchg__ptr, x); break; \
case 8: __xchg__res = __xchg_u64_local(__xchg__ptr, x); break; \
default: __xchg_called_with_bad_pointer(); __xchg__res = x; \
} \
__xchg__res; \
})
#define xchg_local(ptr,x) \
({ \
__typeof__(*(ptr)) _x_ = (x); \
(__typeof__(*(ptr))) __xchg_local((ptr), (unsigned long)_x_, \
sizeof(*(ptr))); \
})
#define tas(ptr) (xchg((ptr),1))
......@@ -596,6 +701,128 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
(unsigned long)_n_, sizeof(*(ptr))); \
})
static inline unsigned long
__cmpxchg_u8_local(volatile char *m, long old, long new)
{
unsigned long prev, tmp, cmp, addr64;
__asm__ __volatile__(
" andnot %5,7,%4\n"
" insbl %1,%5,%1\n"
"1: ldq_l %2,0(%4)\n"
" extbl %2,%5,%0\n"
" cmpeq %0,%6,%3\n"
" beq %3,2f\n"
" mskbl %2,%5,%2\n"
" or %1,%2,%2\n"
" stq_c %2,0(%4)\n"
" beq %2,3f\n"
"2:\n"
".subsection 2\n"
"3: br 1b\n"
".previous"
: "=&r" (prev), "=&r" (new), "=&r" (tmp), "=&r" (cmp), "=&r" (addr64)
: "r" ((long)m), "Ir" (old), "1" (new) : "memory");
return prev;
}
static inline unsigned long
__cmpxchg_u16_local(volatile short *m, long old, long new)
{
unsigned long prev, tmp, cmp, addr64;
__asm__ __volatile__(
" andnot %5,7,%4\n"
" inswl %1,%5,%1\n"
"1: ldq_l %2,0(%4)\n"
" extwl %2,%5,%0\n"
" cmpeq %0,%6,%3\n"
" beq %3,2f\n"
" mskwl %2,%5,%2\n"
" or %1,%2,%2\n"
" stq_c %2,0(%4)\n"
" beq %2,3f\n"
"2:\n"
".subsection 2\n"
"3: br 1b\n"
".previous"
: "=&r" (prev), "=&r" (new), "=&r" (tmp), "=&r" (cmp), "=&r" (addr64)
: "r" ((long)m), "Ir" (old), "1" (new) : "memory");
return prev;
}
static inline unsigned long
__cmpxchg_u32_local(volatile int *m, int old, int new)
{
unsigned long prev, cmp;
__asm__ __volatile__(
"1: ldl_l %0,%5\n"
" cmpeq %0,%3,%1\n"
" beq %1,2f\n"
" mov %4,%1\n"
" stl_c %1,%2\n"
" beq %1,3f\n"
"2:\n"
".subsection 2\n"
"3: br 1b\n"
".previous"
: "=&r"(prev), "=&r"(cmp), "=m"(*m)
: "r"((long) old), "r"(new), "m"(*m) : "memory");
return prev;
}
static inline unsigned long
__cmpxchg_u64_local(volatile long *m, unsigned long old, unsigned long new)
{
unsigned long prev, cmp;
__asm__ __volatile__(
"1: ldq_l %0,%5\n"
" cmpeq %0,%3,%1\n"
" beq %1,2f\n"
" mov %4,%1\n"
" stq_c %1,%2\n"
" beq %1,3f\n"
"2:\n"
".subsection 2\n"
"3: br 1b\n"
".previous"
: "=&r"(prev), "=&r"(cmp), "=m"(*m)
: "r"((long) old), "r"(new), "m"(*m) : "memory");
return prev;
}
static __always_inline unsigned long
__cmpxchg_local(volatile void *ptr, unsigned long old, unsigned long new,
int size)
{
switch (size) {
case 1:
return __cmpxchg_u8_local(ptr, old, new);
case 2:
return __cmpxchg_u16_local(ptr, old, new);
case 4:
return __cmpxchg_u32_local(ptr, old, new);
case 8:
return __cmpxchg_u64_local(ptr, old, new);
}
__cmpxchg_called_with_bad_pointer();
return old;
}
#define cmpxchg_local(ptr,o,n) \
({ \
__typeof__(*(ptr)) _o_ = (o); \
__typeof__(*(ptr)) _n_ = (n); \
(__typeof__(*(ptr))) __cmpxchg_local((ptr), (unsigned long)_o_, \
(unsigned long)_n_, sizeof(*(ptr))); \
})
#endif /* __ASSEMBLY__ */
#define arch_align_stack(x) (x)
......
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