| /* 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 */ |
