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Diffstat (limited to 'include/asm-m32r/local.h')
| -rw-r--r-- | include/asm-m32r/local.h | 366 |
1 files changed, 0 insertions, 366 deletions
diff --git a/include/asm-m32r/local.h b/include/asm-m32r/local.h deleted file mode 100644 index 22256d1..0000000 --- a/include/asm-m32r/local.h +++ /dev/null @@ -1,366 +0,0 @@ -#ifndef __M32R_LOCAL_H -#define __M32R_LOCAL_H - -/* - * linux/include/asm-m32r/local.h - * - * M32R version: - * Copyright (C) 2001, 2002 Hitoshi Yamamoto - * Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org> - * Copyright (C) 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> - */ - -#include <linux/percpu.h> -#include <asm/assembler.h> -#include <asm/system.h> -#include <asm/local.h> - -/* - * Atomic operations that C can't guarantee us. Useful for - * resource counting etc.. - */ - -/* - * Make sure gcc doesn't try to be clever and move things around - * on us. We need to use _exactly_ the address the user gave us, - * not some alias that contains the same information. - */ -typedef struct { volatile int counter; } local_t; - -#define LOCAL_INIT(i) { (i) } - -/** - * local_read - read local variable - * @l: pointer of type local_t - * - * Atomically reads the value of @l. - */ -#define local_read(l) ((l)->counter) - -/** - * local_set - set local variable - * @l: pointer of type local_t - * @i: required value - * - * Atomically sets the value of @l to @i. - */ -#define local_set(l, i) (((l)->counter) = (i)) - -/** - * local_add_return - add long to local variable and return it - * @i: long value to add - * @l: pointer of type local_t - * - * Atomically adds @i to @l and return (@i + @l). - */ -static inline long local_add_return(long i, local_t *l) -{ - unsigned long flags; - long result; - - local_irq_save(flags); - __asm__ __volatile__ ( - "# local_add_return \n\t" - DCACHE_CLEAR("%0", "r4", "%1") - "ld %0, @%1; \n\t" - "add %0, %2; \n\t" - "st %0, @%1; \n\t" - : "=&r" (result) - : "r" (&l->counter), "r" (i) - : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - local_irq_restore(flags); - - return result; -} - -/** - * local_sub_return - subtract long from local variable and return it - * @i: long value to subtract - * @l: pointer of type local_t - * - * Atomically subtracts @i from @l and return (@l - @i). - */ -static inline long local_sub_return(long i, local_t *l) -{ - unsigned long flags; - long result; - - local_irq_save(flags); - __asm__ __volatile__ ( - "# local_sub_return \n\t" - DCACHE_CLEAR("%0", "r4", "%1") - "ld %0, @%1; \n\t" - "sub %0, %2; \n\t" - "st %0, @%1; \n\t" - : "=&r" (result) - : "r" (&l->counter), "r" (i) - : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - local_irq_restore(flags); - - return result; -} - -/** - * local_add - add long to local variable - * @i: long value to add - * @l: pointer of type local_t - * - * Atomically adds @i to @l. - */ -#define local_add(i, l) ((void) local_add_return((i), (l))) - -/** - * local_sub - subtract the local variable - * @i: long value to subtract - * @l: pointer of type local_t - * - * Atomically subtracts @i from @l. - */ -#define local_sub(i, l) ((void) local_sub_return((i), (l))) - -/** - * local_sub_and_test - subtract value from variable and test result - * @i: integer value to subtract - * @l: pointer of type local_t - * - * Atomically subtracts @i from @l and returns - * true if the result is zero, or false for all - * other cases. - */ -#define local_sub_and_test(i, l) (local_sub_return((i), (l)) == 0) - -/** - * local_inc_return - increment local variable and return it - * @l: pointer of type local_t - * - * Atomically increments @l by 1 and returns the result. - */ -static inline long local_inc_return(local_t *l) -{ - unsigned long flags; - long result; - - local_irq_save(flags); - __asm__ __volatile__ ( - "# local_inc_return \n\t" - DCACHE_CLEAR("%0", "r4", "%1") - "ld %0, @%1; \n\t" - "addi %0, #1; \n\t" - "st %0, @%1; \n\t" - : "=&r" (result) - : "r" (&l->counter) - : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - local_irq_restore(flags); - - return result; -} - -/** - * local_dec_return - decrement local variable and return it - * @l: pointer of type local_t - * - * Atomically decrements @l by 1 and returns the result. - */ -static inline long local_dec_return(local_t *l) -{ - unsigned long flags; - long result; - - local_irq_save(flags); - __asm__ __volatile__ ( - "# local_dec_return \n\t" - DCACHE_CLEAR("%0", "r4", "%1") - "ld %0, @%1; \n\t" - "addi %0, #-1; \n\t" - "st %0, @%1; \n\t" - : "=&r" (result) - : "r" (&l->counter) - : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r4" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - local_irq_restore(flags); - - return result; -} - -/** - * local_inc - increment local variable - * @l: pointer of type local_t - * - * Atomically increments @l by 1. - */ -#define local_inc(l) ((void)local_inc_return(l)) - -/** - * local_dec - decrement local variable - * @l: pointer of type local_t - * - * Atomically decrements @l by 1. - */ -#define local_dec(l) ((void)local_dec_return(l)) - -/** - * local_inc_and_test - increment and test - * @l: pointer of type local_t - * - * Atomically increments @l by 1 - * and returns true if the result is zero, or false for all - * other cases. - */ -#define local_inc_and_test(l) (local_inc_return(l) == 0) - -/** - * local_dec_and_test - decrement and test - * @l: pointer of type local_t - * - * Atomically decrements @l by 1 and - * returns true if the result is 0, or false for all - * other cases. - */ -#define local_dec_and_test(l) (local_dec_return(l) == 0) - -/** - * local_add_negative - add and test if negative - * @l: pointer of type local_t - * @i: integer value to add - * - * Atomically adds @i to @l and returns true - * if the result is negative, or false when - * result is greater than or equal to zero. - */ -#define local_add_negative(i, l) (local_add_return((i), (l)) < 0) - -#define local_cmpxchg(l, o, n) (cmpxchg_local(&((l)->counter), (o), (n))) -#define local_xchg(v, new) (xchg_local(&((l)->counter), new)) - -/** - * local_add_unless - add unless the number is a given value - * @l: pointer of type local_t - * @a: the amount to add to l... - * @u: ...unless l is equal to u. - * - * Atomically adds @a to @l, so long as it was not @u. - * Returns non-zero if @l was not @u, and zero otherwise. - */ -static inline int local_add_unless(local_t *l, long a, long u) -{ - long c, old; - c = local_read(l); - for (;;) { - if (unlikely(c == (u))) - break; - old = local_cmpxchg((l), c, c + (a)); - if (likely(old == c)) - break; - c = old; - } - return c != (u); -} - -#define local_inc_not_zero(l) local_add_unless((l), 1, 0) - -static inline void local_clear_mask(unsigned long mask, local_t *addr) -{ - unsigned long flags; - unsigned long tmp; - - local_irq_save(flags); - __asm__ __volatile__ ( - "# local_clear_mask \n\t" - DCACHE_CLEAR("%0", "r5", "%1") - "ld %0, @%1; \n\t" - "and %0, %2; \n\t" - "st %0, @%1; \n\t" - : "=&r" (tmp) - : "r" (addr), "r" (~mask) - : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r5" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - local_irq_restore(flags); -} - -static inline void local_set_mask(unsigned long mask, local_t *addr) -{ - unsigned long flags; - unsigned long tmp; - - local_irq_save(flags); - __asm__ __volatile__ ( - "# local_set_mask \n\t" - DCACHE_CLEAR("%0", "r5", "%1") - "ld %0, @%1; \n\t" - "or %0, %2; \n\t" - "st %0, @%1; \n\t" - : "=&r" (tmp) - : "r" (addr), "r" (mask) - : "memory" -#ifdef CONFIG_CHIP_M32700_TS1 - , "r5" -#endif /* CONFIG_CHIP_M32700_TS1 */ - ); - local_irq_restore(flags); -} - -/* Atomic operations are already serializing on m32r */ -#define smp_mb__before_local_dec() barrier() -#define smp_mb__after_local_dec() barrier() -#define smp_mb__before_local_inc() barrier() -#define smp_mb__after_local_inc() barrier() - -/* Use these for per-cpu local_t variables: on some archs they are - * much more efficient than these naive implementations. Note they take - * a variable, not an address. - */ - -#define __local_inc(l) ((l)->a.counter++) -#define __local_dec(l) ((l)->a.counter++) -#define __local_add(i, l) ((l)->a.counter += (i)) -#define __local_sub(i, l) ((l)->a.counter -= (i)) - -/* Use these for per-cpu local_t variables: on some archs they are - * much more efficient than these naive implementations. Note they take - * a variable, not an address. - */ - -/* Need to disable preemption for the cpu local counters otherwise we could - still access a variable of a previous CPU in a non local way. */ -#define cpu_local_wrap_v(l) \ - ({ local_t res__; \ - preempt_disable(); \ - res__ = (l); \ - preempt_enable(); \ - res__; }) -#define cpu_local_wrap(l) \ - ({ preempt_disable(); \ - l; \ - preempt_enable(); }) \ - -#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l))) -#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i))) -#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l))) -#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l))) -#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l))) -#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l))) - -#define __cpu_local_inc(l) cpu_local_inc(l) -#define __cpu_local_dec(l) cpu_local_dec(l) -#define __cpu_local_add(i, l) cpu_local_add((i), (l)) -#define __cpu_local_sub(i, l) cpu_local_sub((i), (l)) - -#endif /* __M32R_LOCAL_H */ |