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 } 23