diff options
Diffstat (limited to 'include/asm-sparc64')
| -rw-r--r-- | include/asm-sparc64/pci.h | 2 | ||||
| -rw-r--r-- | include/asm-sparc64/spinlock.h | 160 | ||||
| -rw-r--r-- | include/asm-sparc64/spinlock_types.h | 20 | ||||
| -rw-r--r-- | include/asm-sparc64/system.h | 49 |
4 files changed, 86 insertions, 145 deletions
diff --git a/include/asm-sparc64/pci.h b/include/asm-sparc64/pci.h index a4ab0ec7143a..89bd71b1c0d8 100644 --- a/include/asm-sparc64/pci.h +++ b/include/asm-sparc64/pci.h @@ -269,6 +269,8 @@ extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res, struct pci_bus_region *region); +extern struct resource *pcibios_select_root(struct pci_dev *, struct resource *); + static inline void pcibios_add_platform_entries(struct pci_dev *dev) { } diff --git a/include/asm-sparc64/spinlock.h b/include/asm-sparc64/spinlock.h index a02c4370eb42..ec85d12d73b9 100644 --- a/include/asm-sparc64/spinlock.h +++ b/include/asm-sparc64/spinlock.h @@ -29,24 +29,13 @@ * must be pre-V9 branches. */ -#ifndef CONFIG_DEBUG_SPINLOCK +#define __raw_spin_is_locked(lp) ((lp)->lock != 0) -typedef struct { - volatile unsigned char lock; -#ifdef CONFIG_PREEMPT - unsigned int break_lock; -#endif -} spinlock_t; -#define SPIN_LOCK_UNLOCKED (spinlock_t) {0,} +#define __raw_spin_unlock_wait(lp) \ + do { rmb(); \ + } while((lp)->lock) -#define spin_lock_init(lp) do { *(lp)= SPIN_LOCK_UNLOCKED; } while(0) -#define spin_is_locked(lp) ((lp)->lock != 0) - -#define spin_unlock_wait(lp) \ -do { rmb(); \ -} while((lp)->lock) - -static inline void _raw_spin_lock(spinlock_t *lock) +static inline void __raw_spin_lock(raw_spinlock_t *lock) { unsigned long tmp; @@ -67,7 +56,7 @@ static inline void _raw_spin_lock(spinlock_t *lock) : "memory"); } -static inline int _raw_spin_trylock(spinlock_t *lock) +static inline int __raw_spin_trylock(raw_spinlock_t *lock) { unsigned long result; @@ -81,7 +70,7 @@ static inline int _raw_spin_trylock(spinlock_t *lock) return (result == 0UL); } -static inline void _raw_spin_unlock(spinlock_t *lock) +static inline void __raw_spin_unlock(raw_spinlock_t *lock) { __asm__ __volatile__( " membar #StoreStore | #LoadStore\n" @@ -91,7 +80,7 @@ static inline void _raw_spin_unlock(spinlock_t *lock) : "memory"); } -static inline void _raw_spin_lock_flags(spinlock_t *lock, unsigned long flags) +static inline void __raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long flags) { unsigned long tmp1, tmp2; @@ -115,51 +104,9 @@ static inline void _raw_spin_lock_flags(spinlock_t *lock, unsigned long flags) : "memory"); } -#else /* !(CONFIG_DEBUG_SPINLOCK) */ - -typedef struct { - volatile unsigned char lock; - unsigned int owner_pc, owner_cpu; -#ifdef CONFIG_PREEMPT - unsigned int break_lock; -#endif -} spinlock_t; -#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0, 0, 0xff } -#define spin_lock_init(lp) do { *(lp)= SPIN_LOCK_UNLOCKED; } while(0) -#define spin_is_locked(__lock) ((__lock)->lock != 0) -#define spin_unlock_wait(__lock) \ -do { \ - rmb(); \ -} while((__lock)->lock) - -extern void _do_spin_lock(spinlock_t *lock, char *str, unsigned long caller); -extern void _do_spin_unlock(spinlock_t *lock); -extern int _do_spin_trylock(spinlock_t *lock, unsigned long caller); - -#define _raw_spin_trylock(lp) \ - _do_spin_trylock(lp, (unsigned long) __builtin_return_address(0)) -#define _raw_spin_lock(lock) \ - _do_spin_lock(lock, "spin_lock", \ - (unsigned long) __builtin_return_address(0)) -#define _raw_spin_unlock(lock) _do_spin_unlock(lock) -#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock) - -#endif /* CONFIG_DEBUG_SPINLOCK */ - /* Multi-reader locks, these are much saner than the 32-bit Sparc ones... */ -#ifndef CONFIG_DEBUG_SPINLOCK - -typedef struct { - volatile unsigned int lock; -#ifdef CONFIG_PREEMPT - unsigned int break_lock; -#endif -} rwlock_t; -#define RW_LOCK_UNLOCKED (rwlock_t) {0,} -#define rwlock_init(lp) do { *(lp) = RW_LOCK_UNLOCKED; } while(0) - -static void inline __read_lock(rwlock_t *lock) +static void inline __read_lock(raw_rwlock_t *lock) { unsigned long tmp1, tmp2; @@ -184,7 +131,7 @@ static void inline __read_lock(rwlock_t *lock) : "memory"); } -static void inline __read_unlock(rwlock_t *lock) +static void inline __read_unlock(raw_rwlock_t *lock) { unsigned long tmp1, tmp2; @@ -201,7 +148,7 @@ static void inline __read_unlock(rwlock_t *lock) : "memory"); } -static void inline __write_lock(rwlock_t *lock) +static void inline __write_lock(raw_rwlock_t *lock) { unsigned long mask, tmp1, tmp2; @@ -228,7 +175,7 @@ static void inline __write_lock(rwlock_t *lock) : "memory"); } -static void inline __write_unlock(rwlock_t *lock) +static void inline __write_unlock(raw_rwlock_t *lock) { __asm__ __volatile__( " membar #LoadStore | #StoreStore\n" @@ -238,7 +185,7 @@ static void inline __write_unlock(rwlock_t *lock) : "memory"); } -static int inline __write_trylock(rwlock_t *lock) +static int inline __write_trylock(raw_rwlock_t *lock) { unsigned long mask, tmp1, tmp2, result; @@ -263,78 +210,15 @@ static int inline __write_trylock(rwlock_t *lock) return result; } -#define _raw_read_lock(p) __read_lock(p) -#define _raw_read_unlock(p) __read_unlock(p) -#define _raw_write_lock(p) __write_lock(p) -#define _raw_write_unlock(p) __write_unlock(p) -#define _raw_write_trylock(p) __write_trylock(p) - -#else /* !(CONFIG_DEBUG_SPINLOCK) */ - -typedef struct { - volatile unsigned long lock; - unsigned int writer_pc, writer_cpu; - unsigned int reader_pc[NR_CPUS]; -#ifdef CONFIG_PREEMPT - unsigned int break_lock; -#endif -} rwlock_t; -#define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0, 0xff, { } } -#define rwlock_init(lp) do { *(lp) = RW_LOCK_UNLOCKED; } while(0) - -extern void _do_read_lock(rwlock_t *rw, char *str, unsigned long caller); -extern void _do_read_unlock(rwlock_t *rw, char *str, unsigned long caller); -extern void _do_write_lock(rwlock_t *rw, char *str, unsigned long caller); -extern void _do_write_unlock(rwlock_t *rw, unsigned long caller); -extern int _do_write_trylock(rwlock_t *rw, char *str, unsigned long caller); - -#define _raw_read_lock(lock) \ -do { unsigned long flags; \ - local_irq_save(flags); \ - _do_read_lock(lock, "read_lock", \ - (unsigned long) __builtin_return_address(0)); \ - local_irq_restore(flags); \ -} while(0) - -#define _raw_read_unlock(lock) \ -do { unsigned long flags; \ - local_irq_save(flags); \ - _do_read_unlock(lock, "read_unlock", \ - (unsigned long) __builtin_return_address(0)); \ - local_irq_restore(flags); \ -} while(0) - -#define _raw_write_lock(lock) \ -do { unsigned long flags; \ - local_irq_save(flags); \ - _do_write_lock(lock, "write_lock", \ - (unsigned long) __builtin_return_address(0)); \ - local_irq_restore(flags); \ -} while(0) - -#define _raw_write_unlock(lock) \ -do { unsigned long flags; \ - local_irq_save(flags); \ - _do_write_unlock(lock, \ - (unsigned long) __builtin_return_address(0)); \ - local_irq_restore(flags); \ -} while(0) - -#define _raw_write_trylock(lock) \ -({ unsigned long flags; \ - int val; \ - local_irq_save(flags); \ - val = _do_write_trylock(lock, "write_trylock", \ - (unsigned long) __builtin_return_address(0)); \ - local_irq_restore(flags); \ - val; \ -}) - -#endif /* CONFIG_DEBUG_SPINLOCK */ - -#define _raw_read_trylock(lock) generic_raw_read_trylock(lock) -#define read_can_lock(rw) (!((rw)->lock & 0x80000000UL)) -#define write_can_lock(rw) (!(rw)->lock) +#define __raw_read_lock(p) __read_lock(p) +#define __raw_read_unlock(p) __read_unlock(p) +#define __raw_write_lock(p) __write_lock(p) +#define __raw_write_unlock(p) __write_unlock(p) +#define __raw_write_trylock(p) __write_trylock(p) + +#define __raw_read_trylock(lock) generic__raw_read_trylock(lock) +#define __raw_read_can_lock(rw) (!((rw)->lock & 0x80000000UL)) +#define __raw_write_can_lock(rw) (!(rw)->lock) #endif /* !(__ASSEMBLY__) */ diff --git a/include/asm-sparc64/spinlock_types.h b/include/asm-sparc64/spinlock_types.h new file mode 100644 index 000000000000..e128112a0d7c --- /dev/null +++ b/include/asm-sparc64/spinlock_types.h @@ -0,0 +1,20 @@ +#ifndef __SPARC64_SPINLOCK_TYPES_H +#define __SPARC64_SPINLOCK_TYPES_H + +#ifndef __LINUX_SPINLOCK_TYPES_H +# error "please don't include this file directly" +#endif + +typedef struct { + volatile unsigned char lock; +} raw_spinlock_t; + +#define __RAW_SPIN_LOCK_UNLOCKED { 0 } + +typedef struct { + volatile unsigned int lock; +} raw_rwlock_t; + +#define __RAW_RW_LOCK_UNLOCKED { 0 } + +#endif diff --git a/include/asm-sparc64/system.h b/include/asm-sparc64/system.h index 5e94c05dc2fc..b5417529f6f1 100644 --- a/include/asm-sparc64/system.h +++ b/include/asm-sparc64/system.h @@ -28,13 +28,48 @@ enum sparc_cpu { #define ARCH_SUN4C_SUN4 0 #define ARCH_SUN4 0 -extern void mb(void); -extern void rmb(void); -extern void wmb(void); -extern void membar_storeload(void); -extern void membar_storeload_storestore(void); -extern void membar_storeload_loadload(void); -extern void membar_storestore_loadstore(void); +/* These are here in an effort to more fully work around Spitfire Errata + * #51. Essentially, if a memory barrier occurs soon after a mispredicted + * branch, the chip can stop executing instructions until a trap occurs. + * Therefore, if interrupts are disabled, the chip can hang forever. + * + * It used to be believed that the memory barrier had to be right in the + * delay slot, but a case has been traced recently wherein the memory barrier + * was one instruction after the branch delay slot and the chip still hung. + * The offending sequence was the following in sym_wakeup_done() of the + * sym53c8xx_2 driver: + * + * call sym_ccb_from_dsa, 0 + * movge %icc, 0, %l0 + * brz,pn %o0, .LL1303 + * mov %o0, %l2 + * membar #LoadLoad + * + * The branch has to be mispredicted for the bug to occur. Therefore, we put + * the memory barrier explicitly into a "branch always, predicted taken" + * delay slot to avoid the problem case. + */ +#define membar_safe(type) \ +do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \ + " membar " type "\n" \ + "1:\n" \ + : : : "memory"); \ +} while (0) + +#define mb() \ + membar_safe("#LoadLoad | #LoadStore | #StoreStore | #StoreLoad") +#define rmb() \ + membar_safe("#LoadLoad") +#define wmb() \ + membar_safe("#StoreStore") +#define membar_storeload() \ + membar_safe("#StoreLoad") +#define membar_storeload_storestore() \ + membar_safe("#StoreLoad | #StoreStore") +#define membar_storeload_loadload() \ + membar_safe("#StoreLoad | #LoadLoad") +#define membar_storestore_loadstore() \ + membar_safe("#StoreStore | #LoadStore") #endif |
