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Diffstat (limited to 'arch/s390/include/asm/atomic.h')
-rw-r--r--arch/s390/include/asm/atomic.h207
1 files changed, 39 insertions, 168 deletions
diff --git a/arch/s390/include/asm/atomic.h b/arch/s390/include/asm/atomic.h
index d28cc2f5b7b2..f7f69dfd2db2 100644
--- a/arch/s390/include/asm/atomic.h
+++ b/arch/s390/include/asm/atomic.h
@@ -1,13 +1,8 @@
/*
- * Copyright IBM Corp. 1999, 2009
+ * Copyright IBM Corp. 1999, 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
* Denis Joseph Barrow,
- * Arnd Bergmann <arndb@de.ibm.com>,
- *
- * Atomic operations that C can't guarantee us.
- * Useful for resource counting etc.
- * s390 uses 'Compare And Swap' for atomicity in SMP environment.
- *
+ * Arnd Bergmann,
*/
#ifndef __ARCH_S390_ATOMIC__
@@ -15,62 +10,12 @@
#include <linux/compiler.h>
#include <linux/types.h>
+#include <asm/atomic_ops.h>
#include <asm/barrier.h>
#include <asm/cmpxchg.h>
#define ATOMIC_INIT(i) { (i) }
-#define __ATOMIC_NO_BARRIER "\n"
-
-#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
-
-#define __ATOMIC_OR "lao"
-#define __ATOMIC_AND "lan"
-#define __ATOMIC_ADD "laa"
-#define __ATOMIC_XOR "lax"
-#define __ATOMIC_BARRIER "bcr 14,0\n"
-
-#define __ATOMIC_LOOP(ptr, op_val, op_string, __barrier) \
-({ \
- int old_val; \
- \
- typecheck(atomic_t *, ptr); \
- asm volatile( \
- op_string " %0,%2,%1\n" \
- __barrier \
- : "=d" (old_val), "+Q" ((ptr)->counter) \
- : "d" (op_val) \
- : "cc", "memory"); \
- old_val; \
-})
-
-#else /* CONFIG_HAVE_MARCH_Z196_FEATURES */
-
-#define __ATOMIC_OR "or"
-#define __ATOMIC_AND "nr"
-#define __ATOMIC_ADD "ar"
-#define __ATOMIC_XOR "xr"
-#define __ATOMIC_BARRIER "\n"
-
-#define __ATOMIC_LOOP(ptr, op_val, op_string, __barrier) \
-({ \
- int old_val, new_val; \
- \
- typecheck(atomic_t *, ptr); \
- asm volatile( \
- " l %0,%2\n" \
- "0: lr %1,%0\n" \
- op_string " %1,%3\n" \
- " cs %0,%1,%2\n" \
- " jl 0b" \
- : "=&d" (old_val), "=&d" (new_val), "+Q" ((ptr)->counter)\
- : "d" (op_val) \
- : "cc", "memory"); \
- old_val; \
-})
-
-#endif /* CONFIG_HAVE_MARCH_Z196_FEATURES */
-
static inline int atomic_read(const atomic_t *v)
{
int c;
@@ -90,27 +35,23 @@ static inline void atomic_set(atomic_t *v, int i)
static inline int atomic_add_return(int i, atomic_t *v)
{
- return __ATOMIC_LOOP(v, i, __ATOMIC_ADD, __ATOMIC_BARRIER) + i;
+ return __atomic_add_barrier(i, &v->counter) + i;
}
static inline int atomic_fetch_add(int i, atomic_t *v)
{
- return __ATOMIC_LOOP(v, i, __ATOMIC_ADD, __ATOMIC_BARRIER);
+ return __atomic_add_barrier(i, &v->counter);
}
static inline void atomic_add(int i, atomic_t *v)
{
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
if (__builtin_constant_p(i) && (i > -129) && (i < 128)) {
- asm volatile(
- "asi %0,%1\n"
- : "+Q" (v->counter)
- : "i" (i)
- : "cc", "memory");
+ __atomic_add_const(i, &v->counter);
return;
}
#endif
- __ATOMIC_LOOP(v, i, __ATOMIC_ADD, __ATOMIC_NO_BARRIER);
+ __atomic_add(i, &v->counter);
}
#define atomic_add_negative(_i, _v) (atomic_add_return(_i, _v) < 0)
@@ -125,19 +66,19 @@ static inline void atomic_add(int i, atomic_t *v)
#define atomic_dec_return(_v) atomic_sub_return(1, _v)
#define atomic_dec_and_test(_v) (atomic_sub_return(1, _v) == 0)
-#define ATOMIC_OPS(op, OP) \
+#define ATOMIC_OPS(op) \
static inline void atomic_##op(int i, atomic_t *v) \
{ \
- __ATOMIC_LOOP(v, i, __ATOMIC_##OP, __ATOMIC_NO_BARRIER); \
+ __atomic_##op(i, &v->counter); \
} \
static inline int atomic_fetch_##op(int i, atomic_t *v) \
{ \
- return __ATOMIC_LOOP(v, i, __ATOMIC_##OP, __ATOMIC_BARRIER); \
+ return __atomic_##op##_barrier(i, &v->counter); \
}
-ATOMIC_OPS(and, AND)
-ATOMIC_OPS(or, OR)
-ATOMIC_OPS(xor, XOR)
+ATOMIC_OPS(and)
+ATOMIC_OPS(or)
+ATOMIC_OPS(xor)
#undef ATOMIC_OPS
@@ -145,12 +86,7 @@ ATOMIC_OPS(xor, XOR)
static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
{
- asm volatile(
- " cs %0,%2,%1"
- : "+d" (old), "+Q" (v->counter)
- : "d" (new)
- : "cc", "memory");
- return old;
+ return __atomic_cmpxchg(&v->counter, old, new);
}
static inline int __atomic_add_unless(atomic_t *v, int a, int u)
@@ -168,65 +104,11 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
return c;
}
-
-#undef __ATOMIC_LOOP
-
#define ATOMIC64_INIT(i) { (i) }
-#define __ATOMIC64_NO_BARRIER "\n"
-
-#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
-
-#define __ATOMIC64_OR "laog"
-#define __ATOMIC64_AND "lang"
-#define __ATOMIC64_ADD "laag"
-#define __ATOMIC64_XOR "laxg"
-#define __ATOMIC64_BARRIER "bcr 14,0\n"
-
-#define __ATOMIC64_LOOP(ptr, op_val, op_string, __barrier) \
-({ \
- long long old_val; \
- \
- typecheck(atomic64_t *, ptr); \
- asm volatile( \
- op_string " %0,%2,%1\n" \
- __barrier \
- : "=d" (old_val), "+Q" ((ptr)->counter) \
- : "d" (op_val) \
- : "cc", "memory"); \
- old_val; \
-})
-
-#else /* CONFIG_HAVE_MARCH_Z196_FEATURES */
-
-#define __ATOMIC64_OR "ogr"
-#define __ATOMIC64_AND "ngr"
-#define __ATOMIC64_ADD "agr"
-#define __ATOMIC64_XOR "xgr"
-#define __ATOMIC64_BARRIER "\n"
-
-#define __ATOMIC64_LOOP(ptr, op_val, op_string, __barrier) \
-({ \
- long long old_val, new_val; \
- \
- typecheck(atomic64_t *, ptr); \
- asm volatile( \
- " lg %0,%2\n" \
- "0: lgr %1,%0\n" \
- op_string " %1,%3\n" \
- " csg %0,%1,%2\n" \
- " jl 0b" \
- : "=&d" (old_val), "=&d" (new_val), "+Q" ((ptr)->counter)\
- : "d" (op_val) \
- : "cc", "memory"); \
- old_val; \
-})
-
-#endif /* CONFIG_HAVE_MARCH_Z196_FEATURES */
-
-static inline long long atomic64_read(const atomic64_t *v)
+static inline long atomic64_read(const atomic64_t *v)
{
- long long c;
+ long c;
asm volatile(
" lg %0,%1\n"
@@ -234,71 +116,60 @@ static inline long long atomic64_read(const atomic64_t *v)
return c;
}
-static inline void atomic64_set(atomic64_t *v, long long i)
+static inline void atomic64_set(atomic64_t *v, long i)
{
asm volatile(
" stg %1,%0\n"
: "=Q" (v->counter) : "d" (i));
}
-static inline long long atomic64_add_return(long long i, atomic64_t *v)
+static inline long atomic64_add_return(long i, atomic64_t *v)
{
- return __ATOMIC64_LOOP(v, i, __ATOMIC64_ADD, __ATOMIC64_BARRIER) + i;
+ return __atomic64_add_barrier(i, &v->counter) + i;
}
-static inline long long atomic64_fetch_add(long long i, atomic64_t *v)
+static inline long atomic64_fetch_add(long i, atomic64_t *v)
{
- return __ATOMIC64_LOOP(v, i, __ATOMIC64_ADD, __ATOMIC64_BARRIER);
+ return __atomic64_add_barrier(i, &v->counter);
}
-static inline void atomic64_add(long long i, atomic64_t *v)
+static inline void atomic64_add(long i, atomic64_t *v)
{
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
if (__builtin_constant_p(i) && (i > -129) && (i < 128)) {
- asm volatile(
- "agsi %0,%1\n"
- : "+Q" (v->counter)
- : "i" (i)
- : "cc", "memory");
+ __atomic64_add_const(i, &v->counter);
return;
}
#endif
- __ATOMIC64_LOOP(v, i, __ATOMIC64_ADD, __ATOMIC64_NO_BARRIER);
+ __atomic64_add(i, &v->counter);
}
#define atomic64_xchg(v, new) (xchg(&((v)->counter), new))
-static inline long long atomic64_cmpxchg(atomic64_t *v,
- long long old, long long new)
+static inline long atomic64_cmpxchg(atomic64_t *v, long old, long new)
{
- asm volatile(
- " csg %0,%2,%1"
- : "+d" (old), "+Q" (v->counter)
- : "d" (new)
- : "cc", "memory");
- return old;
+ return __atomic64_cmpxchg(&v->counter, old, new);
}
-#define ATOMIC64_OPS(op, OP) \
+#define ATOMIC64_OPS(op) \
static inline void atomic64_##op(long i, atomic64_t *v) \
{ \
- __ATOMIC64_LOOP(v, i, __ATOMIC64_##OP, __ATOMIC64_NO_BARRIER); \
+ __atomic64_##op(i, &v->counter); \
} \
static inline long atomic64_fetch_##op(long i, atomic64_t *v) \
{ \
- return __ATOMIC64_LOOP(v, i, __ATOMIC64_##OP, __ATOMIC64_BARRIER); \
+ return __atomic64_##op##_barrier(i, &v->counter); \
}
-ATOMIC64_OPS(and, AND)
-ATOMIC64_OPS(or, OR)
-ATOMIC64_OPS(xor, XOR)
+ATOMIC64_OPS(and)
+ATOMIC64_OPS(or)
+ATOMIC64_OPS(xor)
#undef ATOMIC64_OPS
-#undef __ATOMIC64_LOOP
-static inline int atomic64_add_unless(atomic64_t *v, long long i, long long u)
+static inline int atomic64_add_unless(atomic64_t *v, long i, long u)
{
- long long c, old;
+ long c, old;
c = atomic64_read(v);
for (;;) {
@@ -312,9 +183,9 @@ static inline int atomic64_add_unless(atomic64_t *v, long long i, long long u)
return c != u;
}
-static inline long long atomic64_dec_if_positive(atomic64_t *v)
+static inline long atomic64_dec_if_positive(atomic64_t *v)
{
- long long c, old, dec;
+ long c, old, dec;
c = atomic64_read(v);
for (;;) {
@@ -333,9 +204,9 @@ static inline long long atomic64_dec_if_positive(atomic64_t *v)
#define atomic64_inc(_v) atomic64_add(1, _v)
#define atomic64_inc_return(_v) atomic64_add_return(1, _v)
#define atomic64_inc_and_test(_v) (atomic64_add_return(1, _v) == 0)
-#define atomic64_sub_return(_i, _v) atomic64_add_return(-(long long)(_i), _v)
-#define atomic64_fetch_sub(_i, _v) atomic64_fetch_add(-(long long)(_i), _v)
-#define atomic64_sub(_i, _v) atomic64_add(-(long long)(_i), _v)
+#define atomic64_sub_return(_i, _v) atomic64_add_return(-(long)(_i), _v)
+#define atomic64_fetch_sub(_i, _v) atomic64_fetch_add(-(long)(_i), _v)
+#define atomic64_sub(_i, _v) atomic64_add(-(long)(_i), _v)
#define atomic64_sub_and_test(_i, _v) (atomic64_sub_return(_i, _v) == 0)
#define atomic64_dec(_v) atomic64_sub(1, _v)
#define atomic64_dec_return(_v) atomic64_sub_return(1, _v)