diff options
Diffstat (limited to 'exec-all.h')
| -rw-r--r-- | exec-all.h | 57 |
1 files changed, 52 insertions, 5 deletions
@@ -297,6 +297,30 @@ extern CPUWriteMemoryFunc *io_mem_write[IO_MEM_NB_ENTRIES][4]; extern CPUReadMemoryFunc *io_mem_read[IO_MEM_NB_ENTRIES][4]; extern void *io_mem_opaque[IO_MEM_NB_ENTRIES]; +#if defined(__hppa__) + +typedef int spinlock_t[4]; + +#define SPIN_LOCK_UNLOCKED { 1, 1, 1, 1 } + +static inline void resetlock (spinlock_t *p) +{ + (*p)[0] = (*p)[1] = (*p)[2] = (*p)[3] = 1; +} + +#else + +typedef int spinlock_t; + +#define SPIN_LOCK_UNLOCKED 0 + +static inline void resetlock (spinlock_t *p) +{ + *p = SPIN_LOCK_UNLOCKED; +} + +#endif + #if defined(__powerpc__) static inline int testandset (int *p) { @@ -396,6 +420,33 @@ static inline int testandset (int *p) : "cc","memory"); return ret; } +#elif defined(__hppa__) + +/* Because malloc only guarantees 8-byte alignment for malloc'd data, + and GCC only guarantees 8-byte alignment for stack locals, we can't + be assured of 16-byte alignment for atomic lock data even if we + specify "__attribute ((aligned(16)))" in the type declaration. So, + we use a struct containing an array of four ints for the atomic lock + type and dynamically select the 16-byte aligned int from the array + for the semaphore. */ +#define __PA_LDCW_ALIGNMENT 16 +static inline void *ldcw_align (void *p) { + unsigned long a = (unsigned long)p; + a = (a + __PA_LDCW_ALIGNMENT - 1) & ~(__PA_LDCW_ALIGNMENT - 1); + return (void *)a; +} + +static inline int testandset (spinlock_t *p) +{ + unsigned int ret; + p = ldcw_align(p); + __asm__ __volatile__("ldcw 0(%1),%0" + : "=r" (ret) + : "r" (p) + : "memory" ); + return !ret; +} + #elif defined(__ia64) #include <ia64intrin.h> @@ -428,10 +479,6 @@ static inline int testandset (int *p) #error unimplemented CPU support #endif -typedef int spinlock_t; - -#define SPIN_LOCK_UNLOCKED 0 - #if defined(CONFIG_USER_ONLY) static inline void spin_lock(spinlock_t *lock) { @@ -440,7 +487,7 @@ static inline void spin_lock(spinlock_t *lock) static inline void spin_unlock(spinlock_t *lock) { - *lock = 0; + resetlock(lock); } static inline int spin_trylock(spinlock_t *lock) |