| Jiaxun Yang | 8c519dc | 2024-06-18 14:56:05 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* Copyright (C) 2021 Cadence Design Systems Inc. */ |
| 3 | |
| 4 | #ifndef _XTENSA_PLATFORM_ISS_SIMCALL_GDBIO_H |
| 5 | #define _XTENSA_PLATFORM_ISS_SIMCALL_GDBIO_H |
| 6 | |
| 7 | /* |
| 8 | * System call like services offered by the GDBIO host. |
| 9 | */ |
| 10 | |
| 11 | #define SYS_open -2 |
| 12 | #define SYS_close -3 |
| 13 | #define SYS_read -4 |
| 14 | #define SYS_write -5 |
| 15 | #define SYS_lseek -6 |
| 16 | |
| 17 | static int errno; |
| 18 | |
| 19 | static inline int __simc(int a, int b, int c, int d) |
| 20 | { |
| 21 | register int a1 asm("a2") = a; |
| 22 | register int b1 asm("a6") = b; |
| 23 | register int c1 asm("a3") = c; |
| 24 | register int d1 asm("a4") = d; |
| 25 | __asm__ __volatile__ ( |
| 26 | "break 1, 14\n" |
| 27 | : "+r"(a1), "+r"(c1) |
| 28 | : "r"(b1), "r"(d1) |
| 29 | : "memory"); |
| 30 | errno = c1; |
| 31 | return a1; |
| 32 | } |
| 33 | |
| 34 | #endif /* _XTENSA_PLATFORM_ISS_SIMCALL_GDBIO_H */ |