root/arch/xtensa/include/uapi/asm/unistd.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 #ifndef _UAPI_XTENSA_UNISTD_H
   3 #define _UAPI_XTENSA_UNISTD_H
   4 
   5 #include <asm/unistd_32.h>
   6 
   7 #define __ARCH_WANT_SYS_OLDUMOUNT
   8 
   9 /*
  10  * sysxtensa syscall handler
  11  *
  12  * int sysxtensa (SYS_XTENSA_ATOMIC_SET,     ptr, val,    unused);
  13  * int sysxtensa (SYS_XTENSA_ATOMIC_ADD,     ptr, val,    unused);
  14  * int sysxtensa (SYS_XTENSA_ATOMIC_EXG_ADD, ptr, val,    unused);
  15  * int sysxtensa (SYS_XTENSA_ATOMIC_CMP_SWP, ptr, oldval, newval);
  16  *        a2            a6                   a3    a4      a5
  17  */
  18 
  19 #define SYS_XTENSA_RESERVED               0     /* don't use this */
  20 #define SYS_XTENSA_ATOMIC_SET             1     /* set variable */
  21 #define SYS_XTENSA_ATOMIC_EXG_ADD         2     /* exchange memory and add */
  22 #define SYS_XTENSA_ATOMIC_ADD             3     /* add to memory */
  23 #define SYS_XTENSA_ATOMIC_CMP_SWP         4     /* compare and swap */
  24 #define SYS_XTENSA_COUNT                  5     /* count */
  25 
  26 #endif /* _UAPI_XTENSA_UNISTD_H */