diff options
Diffstat (limited to 'arch/xtensa/include/asm/processor.h')
| -rw-r--r-- | arch/xtensa/include/asm/processor.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h index 7e409a5b0ec5..abb59708a3b7 100644 --- a/arch/xtensa/include/asm/processor.h +++ b/arch/xtensa/include/asm/processor.h @@ -191,5 +191,25 @@ extern unsigned long get_wchan(struct task_struct *p); #define set_sr(x,sr) ({unsigned int v=(unsigned int)x; WSR(v,sr);}) #define get_sr(sr) ({unsigned int v; RSR(v,sr); v; }) +#ifndef XCHAL_HAVE_EXTERN_REGS +#define XCHAL_HAVE_EXTERN_REGS 0 +#endif + +#if XCHAL_HAVE_EXTERN_REGS + +static inline void set_er(unsigned long value, unsigned long addr) +{ + asm volatile ("wer %0, %1" : : "a" (value), "a" (addr) : "memory"); +} + +static inline unsigned long get_er(unsigned long addr) +{ + register unsigned long value; + asm volatile ("rer %0, %1" : "=a" (value) : "a" (addr) : "memory"); + return value; +} + +#endif /* XCHAL_HAVE_EXTERN_REGS */ + #endif /* __ASSEMBLY__ */ #endif /* _XTENSA_PROCESSOR_H */ |