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blackfin: Provide atomic_{or,xor,and}

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Implement atomic logic ops -- atomic_{or,xor,and}.

These will replace the atomic_{set,clear}_mask functions that are
available on some archs.

TODO: use inline asm or at least asm macros to collapse the lot.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Peter Zijlstra 2015-04-23 21:44:42 +02:00 committed by Thomas Gleixner
parent f8a570e270
commit d835b6c4cc
3 changed files with 40 additions and 25 deletions
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28
arch/blackfin/include/asm/atomic.h
View File

@ -16,19 +16,33 @@
#include <linux/types.h>
asmlinkage int __raw_uncached_fetch_asm(const volatile int *ptr);
asmlinkage int __raw_atomic_update_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_clear_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_set_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_add_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_and_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_or_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_xor_asm(volatile int *ptr, int value);
asmlinkage int __raw_atomic_test_asm(const volatile int *ptr, int value);
#define atomic_read(v) __raw_uncached_fetch_asm(&(v)->counter)
#define atomic_add_return(i, v) __raw_atomic_update_asm(&(v)->counter, i)
#define atomic_sub_return(i, v) __raw_atomic_update_asm(&(v)->counter, -(i))
#define atomic_add_return(i, v) __raw_atomic_add_asm(&(v)->counter, i)
#define atomic_sub_return(i, v) __raw_atomic_add_asm(&(v)->counter, -(i))
#define atomic_clear_mask(m, v) __raw_atomic_clear_asm(&(v)->counter, m)
#define atomic_set_mask(m, v) __raw_atomic_set_asm(&(v)->counter, m)
#define CONFIG_ARCH_HAS_ATOMIC_OR
#define atomic_or(i, v) (void)__raw_atomic_or_asm(&(v)->counter, i)
#define atomic_and(i, v) (void)__raw_atomic_and_asm(&(v)->counter, i)
#define atomic_xor(i, v) (void)__raw_atomic_xor_asm(&(v)->counter, i)
static inline __deprecated void atomic_clear_mask(unsigned int mask, atomic_t *v)
{
atomic_and(~mask, v);
}
static inline __deprecated void atomic_set_mask(unsigned int mask, atomic_t *v)
{
atomic_or(mask, v);
}
#endif

7
arch/blackfin/kernel/bfin_ksyms.c
View File

@ -83,11 +83,12 @@ EXPORT_SYMBOL(insl);
EXPORT_SYMBOL(insl_16);
#ifdef CONFIG_SMP
EXPORT_SYMBOL(__raw_atomic_update_asm);
EXPORT_SYMBOL(__raw_atomic_clear_asm);
EXPORT_SYMBOL(__raw_atomic_set_asm);
EXPORT_SYMBOL(__raw_atomic_add_asm);
EXPORT_SYMBOL(__raw_atomic_and_asm);
EXPORT_SYMBOL(__raw_atomic_or_asm);
EXPORT_SYMBOL(__raw_atomic_xor_asm);
EXPORT_SYMBOL(__raw_atomic_test_asm);
EXPORT_SYMBOL(__raw_xchg_1_asm);
EXPORT_SYMBOL(__raw_xchg_2_asm);
EXPORT_SYMBOL(__raw_xchg_4_asm);

30
arch/blackfin/mach-bf561/atomic.S
View File

@ -587,10 +587,10 @@ ENDPROC(___raw_write_unlock_asm)
* r0 = ptr
* r1 = value
*
* Add a signed value to a 32bit word and return the new value atomically.
* ADD a signed value to a 32bit word and return the new value atomically.
* Clobbers: r3:0, p1:0
*/
ENTRY(___raw_atomic_update_asm)
ENTRY(___raw_atomic_add_asm)
p1 = r0;
r3 = r1;
[--sp] = rets;
@ -603,19 +603,19 @@ ENTRY(___raw_atomic_update_asm)
r0 = r3;
rets = [sp++];
rts;
ENDPROC(___raw_atomic_update_asm)
ENDPROC(___raw_atomic_add_asm)
/*
* r0 = ptr
* r1 = mask
*
* Clear the mask bits from a 32bit word and return the old 32bit value
* AND the mask bits from a 32bit word and return the old 32bit value
* atomically.
* Clobbers: r3:0, p1:0
*/
ENTRY(___raw_atomic_clear_asm)
ENTRY(___raw_atomic_and_asm)
p1 = r0;
r3 = ~r1;
r3 = r1;
[--sp] = rets;
call _get_core_lock;
r2 = [p1];
@ -627,17 +627,17 @@ ENTRY(___raw_atomic_clear_asm)
r0 = r3;
rets = [sp++];
rts;
ENDPROC(___raw_atomic_clear_asm)
ENDPROC(___raw_atomic_and_asm)
/*
* r0 = ptr
* r1 = mask
*
* Set the mask bits into a 32bit word and return the old 32bit value
* OR the mask bits into a 32bit word and return the old 32bit value
* atomically.
* Clobbers: r3:0, p1:0
*/
ENTRY(___raw_atomic_set_asm)
ENTRY(___raw_atomic_or_asm)
p1 = r0;
r3 = r1;
[--sp] = rets;
@ -651,7 +651,7 @@ ENTRY(___raw_atomic_set_asm)
r0 = r3;
rets = [sp++];
rts;
ENDPROC(___raw_atomic_set_asm)
ENDPROC(___raw_atomic_or_asm)
/*
* r0 = ptr
@ -787,7 +787,7 @@ ENTRY(___raw_bit_set_asm)
r2 = r1;
r1 = 1;
r1 <<= r2;
jump ___raw_atomic_set_asm
jump ___raw_atomic_or_asm
ENDPROC(___raw_bit_set_asm)
/*
@ -798,10 +798,10 @@ ENDPROC(___raw_bit_set_asm)
* Clobbers: r3:0, p1:0
*/
ENTRY(___raw_bit_clear_asm)
r2 = r1;
r1 = 1;
r1 <<= r2;
jump ___raw_atomic_clear_asm
r2 = 1;
r2 <<= r1;
r1 = ~r2;
jump ___raw_atomic_and_asm
ENDPROC(___raw_bit_clear_asm)
/*