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sh: Provide movli.l/movco.l-based bitops.

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Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2008-08-07 17:36:12 +09:00
parent 7686ad5606
commit 742fd1bcfb
2 changed files with 146 additions and 0 deletions
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144
arch/sh/include/asm/bitops-llsc.h Normal file
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@ -0,0 +1,144 @@
#ifndef __ASM_SH_BITOPS_LLSC_H
#define __ASM_SH_BITOPS_LLSC_H
static inline void set_bit(int nr, volatile void * addr)
{
int mask;
volatile unsigned int *a = addr;
unsigned long tmp;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
__asm__ __volatile__ (
"1: \n\t"
"movli.l @%1, %0 ! set_bit \n\t"
"or %3, %0 \n\t"
"movco.l %0, @%1 \n\t"
"bf 1b \n\t"
: "=&z" (tmp), "=r" (a)
: "1" (a), "r" (mask)
: "t", "memory"
);
}
static inline void clear_bit(int nr, volatile void * addr)
{
int mask;
volatile unsigned int *a = addr;
unsigned long tmp;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
__asm__ __volatile__ (
"1: \n\t"
"movli.l @%1, %0 ! clear_bit \n\t"
"and %3, %0 \n\t"
"movco.l %0, @%1 \n\t"
"bf 1b \n\t"
: "=&z" (tmp), "=r" (a)
: "1" (a), "r" (~mask)
: "t", "memory"
);
}
static inline void change_bit(int nr, volatile void * addr)
{
int mask;
volatile unsigned int *a = addr;
unsigned long tmp;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
__asm__ __volatile__ (
"1: \n\t"
"movli.l @%1, %0 ! change_bit \n\t"
"xor %3, %0 \n\t"
"movco.l %0, @%1 \n\t"
"bf 1b \n\t"
: "=&z" (tmp), "=r" (a)
: "1" (a), "r" (mask)
: "t", "memory"
);
}
static inline int test_and_set_bit(int nr, volatile void * addr)
{
int mask, retval;
volatile unsigned int *a = addr;
unsigned long tmp;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
__asm__ __volatile__ (
"1: \n\t"
"movli.l @%1, %0 ! test_and_set_bit \n\t"
"mov %0, %2 \n\t"
"or %4, %0 \n\t"
"movco.l %0, @%1 \n\t"
"bf 1b \n\t"
"and %4, %2 \n\t"
: "=&z" (tmp), "=r" (a), "=&r" (retval)
: "1" (a), "r" (mask)
: "t", "memory"
);
return retval != 0;
}
static inline int test_and_clear_bit(int nr, volatile void * addr)
{
int mask, retval;
volatile unsigned int *a = addr;
unsigned long tmp;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
__asm__ __volatile__ (
"1: \n\t"
"movli.l @%1, %0 ! test_and_clear_bit \n\t"
"mov %0, %2 \n\t"
"and %5, %0 \n\t"
"movco.l %0, @%1 \n\t"
"bf 1b \n\t"
"and %4, %2 \n\t"
"synco \n\t"
: "=&z" (tmp), "=r" (a), "=&r" (retval)
: "1" (a), "r" (mask), "r" (~mask)
: "t", "memory"
);
return retval != 0;
}
static inline int test_and_change_bit(int nr, volatile void * addr)
{
int mask, retval;
volatile unsigned int *a = addr;
unsigned long tmp;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
__asm__ __volatile__ (
"1: \n\t"
"movli.l @%1, %0 ! test_and_change_bit \n\t"
"mov %0, %2 \n\t"
"xor %4, %0 \n\t"
"movco.l %0, @%1 \n\t"
"bf 1b \n\t"
"and %4, %2 \n\t"
"synco \n\t"
: "=&z" (tmp), "=r" (a), "=&r" (retval)
: "1" (a), "r" (mask)
: "t", "memory"
);
return retval != 0;
}
#endif /* __ASM_SH_BITOPS_LLSC_H */

2
arch/sh/include/asm/bitops.h
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@ -13,6 +13,8 @@
#ifdef CONFIG_GUSA_RB
#include <asm/bitops-grb.h>
#elif defined(CONFIG_CPU_SH4A)
#include <asm/bitops-llsc.h>
#else
#include <asm/bitops-irq.h>
#endif