+++ /dev/null
-#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 */
git.openpandora.org / pandora-kernel.git / blobdiff