/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2021 Cadence Design Systems Inc. */

#ifndef _XTENSA_PLATFORM_ISS_SIMCALL_GDBIO_H
#define _XTENSA_PLATFORM_ISS_SIMCALL_GDBIO_H

/*
 *  System call like services offered by the GDBIO host.
 */

#define SYS_open        -2
#define SYS_close       -3
#define SYS_read        -4
#define SYS_write       -5
#define SYS_lseek       -6

static int errno;

static inline int __simc(int a, int b, int c, int d)
{
        register int a1 asm("a2") = a;
        register int b1 asm("a6") = b;
        register int c1 asm("a3") = c;
        register int d1 asm("a4") = d;
        __asm__ __volatile__ (
                        "break 1, 14\n"
                        : "+r"(a1), "+r"(c1)
                        : "r"(b1), "r"(d1)
                        : "memory");
        errno = c1;
        return a1;
}

#endif /* _XTENSA_PLATFORM_ISS_SIMCALL_GDBIO_H */