kernel/arch/metag/include/asm/core_reg.h

   1 #ifndef __ASM_METAG_CORE_REG_H_
   2 #define __ASM_METAG_CORE_REG_H_
   3
   4 #include <asm/metag_regs.h>
   5
   6 extern void core_reg_write(int unit, int reg, int thread, unsigned int val);
   7 extern unsigned int core_reg_read(int unit, int reg, int thread);
   8
   9 /*
  10  * These macros allow direct access from C to any register known to the
  11  * assembler. Example candidates are TXTACTCYC, TXIDLECYC, and TXPRIVEXT.
  12  */
  13
  14 #define __core_reg_get(reg) ({                                          \
  15         unsigned int __grvalue;                                         \
  16         asm volatile("MOV       %0," #reg                               \
  17                      : "=r" (__grvalue));                               \
  18         __grvalue;                                                      \
  19 })
  20
  21 #define __core_reg_set(reg, value) do {                                 \
  22         unsigned int __srvalue = (value);                               \
  23         asm volatile("MOV       " #reg ",%0"                            \
  24                      :                                                  \
  25                      : "r" (__srvalue));                                \
  26 } while (0)
  27
  28 #define __core_reg_swap(reg, value) do {                                \
  29         unsigned int __srvalue = (value);                               \
  30         asm volatile("SWAP      " #reg ",%0"                            \
  31                      : "+r" (__srvalue));                               \
  32         (value) = __srvalue;                                            \
  33 } while (0)
  34
  35 #endif