| 1 | /* |
| 2 | * Semihosting Console Test |
| 3 | * |
| 4 | * Copyright (c) 2019 Linaro Ltd |
| 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 7 | */ |
| 8 | |
| 9 | #include <stdint.h> |
| 10 | #include <minilib.h> |
| 11 | |
| 12 | #define SYS_READC 0x7 |
| 13 | |
| 14 | uintptr_t __semi_call(uintptr_t type, uintptr_t arg0) |
| 15 | { |
| 16 | register uintptr_t t asm("x0") = type; |
| 17 | register uintptr_t a0 asm("x1") = arg0; |
| 18 | asm("hlt 0xf000" |
| 19 | : "=r" (t) |
| 20 | : "r" (t), "r" (a0)); |
| 21 | |
| 22 | return t; |
| 23 | } |
| 24 | |
| 25 | int main(void) |
| 26 | { |
| 27 | char c; |
| 28 | |
| 29 | ml_printf("Semihosting Console Test\n"); |
| 30 | ml_printf("hit X to exit:"); |
| 31 | |
| 32 | do { |
| 33 | c = __semi_call(SYS_READC, 0); |
| 34 | __sys_outc(c); |
| 35 | } while (c != 'X'); |
| 36 | |
| 37 | return 0; |
| 38 | } |