diff options
Diffstat (limited to 'arch/blackfin/include/asm/system.h')
| -rw-r--r-- | arch/blackfin/include/asm/system.h | 185 |
1 files changed, 90 insertions, 95 deletions
diff --git a/arch/blackfin/include/asm/system.h b/arch/blackfin/include/asm/system.h index 8f1627d8bf0..a4c8254bec5 100644 --- a/arch/blackfin/include/asm/system.h +++ b/arch/blackfin/include/asm/system.h @@ -37,114 +37,98 @@ #include <linux/linkage.h> #include <linux/compiler.h> #include <mach/anomaly.h> +#include <asm/pda.h> +#include <asm/processor.h> +#include <asm/irq.h> /* - * Interrupt configuring macros. + * Force strict CPU ordering. */ +#define nop() __asm__ __volatile__ ("nop;\n\t" : : ) +#define mb() __asm__ __volatile__ ("" : : : "memory") +#define rmb() __asm__ __volatile__ ("" : : : "memory") +#define wmb() __asm__ __volatile__ ("" : : : "memory") +#define set_mb(var, value) do { (void) xchg(&var, value); } while (0) +#define read_barrier_depends() do { } while(0) -extern unsigned long irq_flags; - -#define local_irq_enable() \ - __asm__ __volatile__( \ - "sti %0;" \ - : \ - : "d" (irq_flags) \ - ) - -#define local_irq_disable() \ - do { \ - int __tmp_dummy; \ - __asm__ __volatile__( \ - "cli %0;" \ - : "=d" (__tmp_dummy) \ - ); \ - } while (0) - -#if ANOMALY_05000244 && defined(CONFIG_BFIN_ICACHE) -# define NOP_PAD_ANOMALY_05000244 "nop; nop;" -#else -# define NOP_PAD_ANOMALY_05000244 -#endif - -#define idle_with_irq_disabled() \ - __asm__ __volatile__( \ - NOP_PAD_ANOMALY_05000244 \ - ".align 8;" \ - "sti %0;" \ - "idle;" \ - : \ - : "d" (irq_flags) \ - ) - -#ifdef CONFIG_DEBUG_HWERR -# define __save_and_cli(x) \ - __asm__ __volatile__( \ - "cli %0;" \ - "sti %1;" \ - : "=&d" (x) \ - : "d" (0x3F) \ - ) -#else -# define __save_and_cli(x) \ - __asm__ __volatile__( \ - "cli %0;" \ - : "=&d" (x) \ - ) -#endif - -#define local_save_flags(x) \ - __asm__ __volatile__( \ - "cli %0;" \ - "sti %0;" \ - : "=d" (x) \ - ) +#ifdef CONFIG_SMP +asmlinkage unsigned long __raw_xchg_1_asm(volatile void *ptr, unsigned long value); +asmlinkage unsigned long __raw_xchg_2_asm(volatile void *ptr, unsigned long value); +asmlinkage unsigned long __raw_xchg_4_asm(volatile void *ptr, unsigned long value); +asmlinkage unsigned long __raw_cmpxchg_1_asm(volatile void *ptr, + unsigned long new, unsigned long old); +asmlinkage unsigned long __raw_cmpxchg_2_asm(volatile void *ptr, + unsigned long new, unsigned long old); +asmlinkage unsigned long __raw_cmpxchg_4_asm(volatile void *ptr, + unsigned long new, unsigned long old); + +#ifdef __ARCH_SYNC_CORE_DCACHE +# define smp_mb() do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0) +# define smp_rmb() do { barrier(); smp_check_barrier(); } while (0) +# define smp_wmb() do { barrier(); smp_mark_barrier(); } while (0) +#define smp_read_barrier_depends() do { barrier(); smp_check_barrier(); } while (0) -#ifdef CONFIG_DEBUG_HWERR -#define irqs_enabled_from_flags(x) (((x) & ~0x3f) != 0) #else -#define irqs_enabled_from_flags(x) ((x) != 0x1f) +# define smp_mb() barrier() +# define smp_rmb() barrier() +# define smp_wmb() barrier() +#define smp_read_barrier_depends() barrier() #endif -#define local_irq_restore(x) \ - do { \ - if (irqs_enabled_from_flags(x)) \ - local_irq_enable(); \ - } while (0) +static inline unsigned long __xchg(unsigned long x, volatile void *ptr, + int size) +{ + unsigned long tmp; -/* For spinlocks etc */ -#define local_irq_save(x) __save_and_cli(x) + switch (size) { + case 1: + tmp = __raw_xchg_1_asm(ptr, x); + break; + case 2: + tmp = __raw_xchg_2_asm(ptr, x); + break; + case 4: + tmp = __raw_xchg_4_asm(ptr, x); + break; + } -#define irqs_disabled() \ -({ \ - unsigned long flags; \ - local_save_flags(flags); \ - !irqs_enabled_from_flags(flags); \ -}) + return tmp; +} /* - * Force strict CPU ordering. + * Atomic compare and exchange. Compare OLD with MEM, if identical, + * store NEW in MEM. Return the initial value in MEM. Success is + * indicated by comparing RETURN with OLD. */ -#define nop() asm volatile ("nop;\n\t"::) -#define mb() asm volatile ("" : : :"memory") -#define rmb() asm volatile ("" : : :"memory") -#define wmb() asm volatile ("" : : :"memory") -#define set_mb(var, value) do { (void) xchg(&var, value); } while (0) +static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, + unsigned long new, int size) +{ + unsigned long tmp; -#define read_barrier_depends() do { } while(0) + switch (size) { + case 1: + tmp = __raw_cmpxchg_1_asm(ptr, new, old); + break; + case 2: + tmp = __raw_cmpxchg_2_asm(ptr, new, old); + break; + case 4: + tmp = __raw_cmpxchg_4_asm(ptr, new, old); + break; + } + + return tmp; +} +#define cmpxchg(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o), \ + (unsigned long)(n), sizeof(*(ptr)))) + +#else /* !CONFIG_SMP */ -#ifdef CONFIG_SMP -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() -#define smp_read_barrier_depends() read_barrier_depends() -#else #define smp_mb() barrier() #define smp_rmb() barrier() #define smp_wmb() barrier() #define smp_read_barrier_depends() do { } while(0) -#endif - -#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) struct __xchg_dummy { unsigned long a[100]; @@ -157,7 +141,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, unsigned long tmp = 0; unsigned long flags = 0; - local_irq_save(flags); + local_irq_save_hw(flags); switch (size) { case 1: @@ -179,7 +163,7 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory"); break; } - local_irq_restore(flags); + local_irq_restore_hw(flags); return tmp; } @@ -194,9 +178,12 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, (unsigned long)(n), sizeof(*(ptr)))) #define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) -#ifndef CONFIG_SMP #include <asm-generic/cmpxchg.h> -#endif + +#endif /* !CONFIG_SMP */ + +#define xchg(ptr, x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) +#define tas(ptr) ((void)xchg((ptr), 1)) #define prepare_to_switch() do { } while(0) @@ -205,10 +192,12 @@ static inline unsigned long __xchg(unsigned long x, volatile void *ptr, * ptr isn't the current task, in which case it does nothing. */ -#include <asm/blackfin.h> +#include <asm/l1layout.h> +#include <asm/mem_map.h> asmlinkage struct task_struct *resume(struct task_struct *prev, struct task_struct *next); +#ifndef CONFIG_SMP #define switch_to(prev,next,last) \ do { \ memcpy (&task_thread_info(prev)->l1_task_info, L1_SCRATCH_TASK_INFO, \ @@ -217,5 +206,11 @@ do { \ sizeof *L1_SCRATCH_TASK_INFO); \ (last) = resume (prev, next); \ } while (0) +#else +#define switch_to(prev, next, last) \ +do { \ + (last) = resume(prev, next); \ +} while (0) +#endif -#endif /* _BLACKFIN_SYSTEM_H */ +#endif /* _BLACKFIN_SYSTEM_H */ |