[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] ia64: introduce atomic_{read,write}NN()
On 11/11/2011 16:09, "Jan Beulich" <JBeulich@xxxxxxxx> wrote: > These are required to be able to build certain portions of common code. > > Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> Acked-by: Keir Fraser <keir@xxxxxxx> > --- a/xen/include/asm-ia64/linux-xen/asm/atomic.h > +++ b/xen/include/asm-ia64/linux-xen/asm/atomic.h > @@ -24,12 +24,9 @@ typedef struct { volatile __s32 counter; > typedef struct { volatile __s64 counter; } atomic64_t; > > #ifndef XEN > + > #define ATOMIC_INIT(i) ((atomic_t) { (i) }) > #define ATOMIC64_INIT(i) ((atomic64_t) { (i) }) > -#else > -#define ATOMIC_INIT(i) { (i) } > -#define ATOMIC64_INIT(i) { (i) } > -#endif > > #define atomic_read(v) ((v)->counter) > #define atomic64_read(v) ((v)->counter) > @@ -37,6 +34,55 @@ typedef struct { volatile __s64 counter; > #define atomic_set(v,i) (((v)->counter) = (i)) > #define atomic64_set(v,i) (((v)->counter) = (i)) > > +#else > + > +#define ATOMIC_INIT(i) { (i) } > +#define ATOMIC64_INIT(i) { (i) } > + > +#define build_atomic_read(tag, type) \ > +static inline type atomic_read##tag(const volatile type *addr) \ > +{ \ > + type ret; \ > + asm volatile("ld%2.acq %0 = %1" \ > + : "=r" (ret) \ > + : "m" (*addr), "i" (sizeof(type))); \ > + return ret; \ > +} > + > +#define build_atomic_write(tag, type) \ > +static inline void atomic_write##tag(volatile type *addr, type val) \ > +{ \ > + asm volatile("st%2.rel %0 = %1" \ > + : "=m" (*addr) \ > + : "r" (val), "i" (sizeof(type))); \ > +} > + > +build_atomic_read(8, uint8_t) > +build_atomic_read(16, uint16_t) > +build_atomic_read(32, uint32_t) > +build_atomic_read(64, uint64_t) > +build_atomic_read(_int, int) > +build_atomic_read(_long, long) > + > +build_atomic_write(8, uint8_t) > +build_atomic_write(16, uint16_t) > +build_atomic_write(32, uint32_t) > +build_atomic_write(64, uint64_t) > +build_atomic_write(_int, int) > +build_atomic_write(_long, long) > + > +#define _atomic_read(v) ((v).counter) > +#define _atomic64_read(v) ((v).counter) > +#define atomic_read(v) atomic_read_int(&((v)->counter)) > +#define atomic64_read(v) atomic_read_long(&((v)->counter)) > + > +#define _atomic_set(v,i) (((v).counter) = (i)) > +#define _atomic64_set(v,i) (((v).counter) = (i)) > +#define atomic_set(v,i) atomic_write_int(&((v)->counter), i) > +#define atomic64_set(v,l) atomic_write_long(&((v)->counter), l) > + > +#endif > + > static __inline__ int > ia64_atomic_add (int i, atomic_t *v) > { > @@ -59,7 +105,7 @@ ia64_atomic64_add (__s64 i, atomic64_t * > > do { > CMPXCHG_BUGCHECK(v); > - old = atomic_read(v); > + old = atomic64_read(v); > new = old + i; > } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old); > return new; > @@ -87,7 +133,7 @@ ia64_atomic64_sub (__s64 i, atomic64_t * > > do { > CMPXCHG_BUGCHECK(v); > - old = atomic_read(v); > + old = atomic64_read(v); > new = old - i; > } while (ia64_cmpxchg(acq, v, old, new, sizeof(atomic64_t)) != old); > return new; > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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