1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 2#ifndef _XTENSA_UNISTD_H
 3#define _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 /* _XTENSA_UNISTD_H */