diff options
| -rw-r--r-- | arch/sh/include/asm/cmpxchg-llsc.h | 71 | ||||
| -rw-r--r-- | arch/sh/include/asm/system.h | 2 |
2 files changed, 73 insertions, 0 deletions
diff --git a/arch/sh/include/asm/cmpxchg-llsc.h b/arch/sh/include/asm/cmpxchg-llsc.h new file mode 100644 index 00000000000..aee3bf28658 --- /dev/null +++ b/arch/sh/include/asm/cmpxchg-llsc.h @@ -0,0 +1,71 @@ +#ifndef __ASM_SH_CMPXCHG_LLSC_H +#define __ASM_SH_CMPXCHG_LLSC_H + +static inline unsigned long xchg_u32(volatile u32 *m, unsigned long val) +{ + unsigned long retval; + unsigned long tmp; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%1, %0 ! xchg_u32 \n\t" + "mov %0, %2 \n\t" + "mov %4, %0 \n\t" + "movco.l %0, @%1 \n\t" + "bf 1b \n\t" + "synco \n\t" + : "=&z"(tmp), "=r" (m), "=&r" (retval) + : "1" (m), "r" (val) + : "t", "memory" + ); + + return retval; +} + +static inline unsigned long xchg_u8(volatile u8 *m, unsigned long val) +{ + unsigned long retval; + unsigned long tmp; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%1, %0 ! xchg_u8 \n\t" + "mov %0, %2 \n\t" + "mov %4, %0 \n\t" + "movco.l %0, @%1 \n\t" + "bf 1b \n\t" + "synco \n\t" + : "=&z"(tmp), "=r" (m), "=&r" (retval) + : "1" (m), "r" (val & 0xff) + : "t", "memory" + ); + + return retval; +} + +static inline unsigned long +__cmpxchg_u32(volatile int *m, unsigned long old, unsigned long new) +{ + unsigned long retval; + unsigned long tmp; + + __asm__ __volatile__ ( + "1: \n\t" + "movli.l @%1, %0 ! __cmpxchg_u32 \n\t" + "mov %0, %2 \n\t" + "cmp/eq %2, %4 \n\t" + "bf 2f \n\t" + "mov %5, %0 \n\t" + "2: \n\t" + "movco.l %0, @%1 \n\t" + "bf 1b \n\t" + "synco \n\t" + : "=&z" (tmp), "=r" (m), "=&r" (retval) + : "1" (m), "r" (old), "r" (new) + : "t", "memory" + ); + + return retval; +} + +#endif /* __ASM_SH_CMPXCHG_LLSC_H */ diff --git a/arch/sh/include/asm/system.h b/arch/sh/include/asm/system.h index 056d68cd210..fbac113bbfb 100644 --- a/arch/sh/include/asm/system.h +++ b/arch/sh/include/asm/system.h @@ -70,6 +70,8 @@ #ifdef CONFIG_GUSA_RB #include <asm/cmpxchg-grb.h> +#elif defined(CONFIG_CPU_SH4A) +#include <asm/cmpxchg-llsc.h> #else #include <asm/cmpxchg-irq.h> #endif |