diff options
Diffstat (limited to 'arch/metag/include/asm/core_reg.h')
| -rw-r--r-- | arch/metag/include/asm/core_reg.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/metag/include/asm/core_reg.h b/arch/metag/include/asm/core_reg.h new file mode 100644 index 00000000000..bdbc3a51f31 --- /dev/null +++ b/arch/metag/include/asm/core_reg.h @@ -0,0 +1,35 @@ +#ifndef __ASM_METAG_CORE_REG_H_ +#define __ASM_METAG_CORE_REG_H_ + +#include <asm/metag_regs.h> + +extern void core_reg_write(int unit, int reg, int thread, unsigned int val); +extern unsigned int core_reg_read(int unit, int reg, int thread); + +/* + * These macros allow direct access from C to any register known to the + * assembler. Example candidates are TXTACTCYC, TXIDLECYC, and TXPRIVEXT. + */ + +#define __core_reg_get(reg) ({ \ + unsigned int __grvalue; \ + asm volatile("MOV %0," #reg \ + : "=r" (__grvalue)); \ + __grvalue; \ +}) + +#define __core_reg_set(reg, value) do { \ + unsigned int __srvalue = (value); \ + asm volatile("MOV " #reg ",%0" \ + : \ + : "r" (__srvalue)); \ +} while (0) + +#define __core_reg_swap(reg, value) do { \ + unsigned int __srvalue = (value); \ + asm volatile("SWAP " #reg ",%0" \ + : "+r" (__srvalue)); \ + (value) = __srvalue; \ +} while (0) + +#endif |