| 1 | /* |
| 2 | * Semihosting Tests - RiscV64 Helper |
| 3 | * |
| 4 | * Copyright (c) 2021, 2024 |
| 5 | * Written by Alex Bennée <alex.bennee@linaro.org> |
| 6 | * |
| 7 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 8 | */ |
| 9 | |
| 10 | uintptr_t __semi_call(uintptr_t type, uintptr_t arg0) |
| 11 | { |
| 12 | register uintptr_t t asm("a0") = type; |
| 13 | register uintptr_t a0 asm("a1") = arg0; |
| 14 | asm(".option norvc\n\t" |
| 15 | ".balign 16\n\t" |
| 16 | "slli zero, zero, 0x1f\n\t" |
| 17 | "ebreak\n\t" |
| 18 | "srai zero, zero, 0x7\n\t" |
| 19 | : "=r" (t) |
| 20 | : "r" (t), "r" (a0)); |
| 21 | return t; |
| 22 | } |