| // SPDX-FileCopyrightText: © 2022 Leo Moser <https://codeberg.org/mole99> |
| // SPDX-License-Identifier: GPL-3.0-or-later |
| |
| #define CSR_MHARTID 0xF14 |
| |
| .global main |
| .global _stack |
| |
| .section .reset_vector |
| |
| reset_vector: |
| j start |
| |
| .section .text |
| |
| start: |
| // Clear all registers |
| addi x1, zero, 0 |
| addi x2, zero, 0 |
| addi x3, zero, 0 |
| addi x4, zero, 0 |
| addi x5, zero, 0 |
| addi x6, zero, 0 |
| addi x7, zero, 0 |
| addi x8, zero, 0 |
| addi x9, zero, 0 |
| addi x10, zero, 0 |
| addi x11, zero, 0 |
| addi x12, zero, 0 |
| addi x13, zero, 0 |
| addi x14, zero, 0 |
| addi x15, zero, 0 |
| addi x16, zero, 0 |
| addi x17, zero, 0 |
| addi x18, zero, 0 |
| addi x19, zero, 0 |
| addi x20, zero, 0 |
| addi x21, zero, 0 |
| addi x22, zero, 0 |
| addi x23, zero, 0 |
| addi x24, zero, 0 |
| addi x25, zero, 0 |
| addi x26, zero, 0 |
| addi x27, zero, 0 |
| addi x28, zero, 0 |
| addi x29, zero, 0 |
| addi x30, zero, 0 |
| addi x31, zero, 0 |
| |
| // Initialize stack pointer |
| la sp, _stack |
| |
| // Set the machine hart id as first argument |
| csrr a0, CSR_MHARTID |
| |
| // Call main |
| call main |
| |
| // Trap |
| ebreak |
| |
| // Infinite loop |
| loop: |
| j loop |
