arch/metag/include/asm/core_reg.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_METAG_CORE_REG_H_
   3 #define __ASM_METAG_CORE_REG_H_
   4
   5 #include <asm/metag_regs.h>
   6
   7 extern void core_reg_write(int unit, int reg, int thread, unsigned int val);
   8 extern unsigned int core_reg_read(int unit, int reg, int thread);
   9
  10 /*
  11  * These macros allow direct access from C to any register known to the
  12  * assembler. Example candidates are TXTACTCYC, TXIDLECYC, and TXPRIVEXT.
  13  */
  14
  15 #define __core_reg_get(reg) ({                                          \
  16         unsigned int __grvalue;                                         \
  17         asm volatile("MOV       %0," #reg                               \
  18                      : "=r" (__grvalue));                               \
  19         __grvalue;                                                      \
  20 })
  21
  22 #define __core_reg_set(reg, value) do {                                 \
  23         unsigned int __srvalue = (value);                               \
  24         asm volatile("MOV       " #reg ",%0"                            \
  25                      :                                                  \
  26                      : "r" (__srvalue));                                \
  27 } while (0)
  28
  29 #define __core_reg_swap(reg, value) do {                                \
  30         unsigned int __srvalue = (value);                               \
  31         asm volatile("SWAP      " #reg ",%0"                            \
  32                      : "+r" (__srvalue));                               \
  33         (value) = __srvalue;                                            \
  34 } while (0)
  35
  36 #endif