diff options
Diffstat (limited to 'arch/blackfin/include/asm/system.h')
| -rw-r--r-- | arch/blackfin/include/asm/system.h | 197 |
1 files changed, 5 insertions, 192 deletions
diff --git a/arch/blackfin/include/asm/system.h b/arch/blackfin/include/asm/system.h index 44bd0cced725..a7f40578587c 100644 --- a/arch/blackfin/include/asm/system.h +++ b/arch/blackfin/include/asm/system.h @@ -1,192 +1,5 @@ -/* - * Copyright 2004-2009 Analog Devices Inc. - * Tony Kou (tonyko@lineo.ca) - * - * Licensed under the GPL-2 or later - */ - -#ifndef _BLACKFIN_SYSTEM_H -#define _BLACKFIN_SYSTEM_H - -#include <linux/linkage.h> -#include <linux/irqflags.h> -#include <mach/anomaly.h> -#include <asm/cache.h> -#include <asm/pda.h> -#include <asm/irq.h> - -/* - * Force strict CPU ordering. - */ -#define nop() __asm__ __volatile__ ("nop;\n\t" : : ) -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() -#define set_mb(var, value) do { var = value; mb(); } while (0) -#define smp_read_barrier_depends() read_barrier_depends() - -#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 -/* Force Core data cache coherence */ -# define mb() do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0) -# define rmb() do { barrier(); smp_check_barrier(); } while (0) -# define wmb() do { barrier(); smp_mark_barrier(); } while (0) -# define read_barrier_depends() do { barrier(); smp_check_barrier(); } while (0) -#else -# define mb() barrier() -# define rmb() barrier() -# define wmb() barrier() -# define read_barrier_depends() do { } while (0) -#endif - -static inline unsigned long __xchg(unsigned long x, volatile void *ptr, - int size) -{ - unsigned long tmp; - - 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; - } - - return tmp; -} - -/* - * 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. - */ -static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old, - unsigned long new, int size) -{ - unsigned long tmp; - - 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 */ - -#define mb() barrier() -#define rmb() barrier() -#define wmb() barrier() -#define read_barrier_depends() do { } while (0) - -struct __xchg_dummy { - unsigned long a[100]; -}; -#define __xg(x) ((volatile struct __xchg_dummy *)(x)) - -#include <mach/blackfin.h> - -static inline unsigned long __xchg(unsigned long x, volatile void *ptr, - int size) -{ - unsigned long tmp = 0; - unsigned long flags; - - flags = hard_local_irq_save(); - - switch (size) { - case 1: - __asm__ __volatile__ - ("%0 = b%2 (z);\n\t" - "b%2 = %1;\n\t" - : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory"); - break; - case 2: - __asm__ __volatile__ - ("%0 = w%2 (z);\n\t" - "w%2 = %1;\n\t" - : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory"); - break; - case 4: - __asm__ __volatile__ - ("%0 = %2;\n\t" - "%2 = %1;\n\t" - : "=&d" (tmp) : "d" (x), "m" (*__xg(ptr)) : "memory"); - break; - } - hard_local_irq_restore(flags); - return tmp; -} - -#include <asm-generic/cmpxchg-local.h> - -/* - * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make - * them available. - */ -#define cmpxchg_local(ptr, o, n) \ - ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ - (unsigned long)(n), sizeof(*(ptr)))) -#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) - -#include <asm-generic/cmpxchg.h> - -#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) - -/* - * switch_to(n) should switch tasks to task ptr, first checking that - * ptr isn't the current task, in which case it does nothing. - */ - -#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, \ - sizeof *L1_SCRATCH_TASK_INFO); \ - memcpy (L1_SCRATCH_TASK_INFO, &task_thread_info(next)->l1_task_info, \ - 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 */ +/* FILE TO BE DELETED. DO NOT ADD STUFF HERE! */ +#include <asm/barrier.h> +#include <asm/cmpxchg.h> +#include <asm/exec.h> +#include <asm/switch_to.h> |
