| 1 | /*- |
| 2 | * SPDX-License-Identifier: BSD-2-Clause |
| 3 | * |
| 4 | * Copyright (c) 2021 Mitchell Horne <mhorne@FreeBSD.org> |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #ifndef _MACHINE_GDB_MACHDEP_H_ |
| 30 | #define _MACHINE_GDB_MACHDEP_H_ |
| 31 | |
| 32 | #define GDB_BUFSZ 4096 |
| 33 | #define GDB_NREGS 33 |
| 34 | #define GDB_REG_ZERO 0 |
| 35 | #define GDB_REG_RA 1 |
| 36 | #define GDB_REG_SP 2 |
| 37 | #define GDB_REG_GP 3 |
| 38 | #define GDB_REG_TP 4 |
| 39 | #define GDB_REG_T0 5 |
| 40 | #define GDB_REG_FP 8 |
| 41 | #define GDB_REG_S1 9 |
| 42 | #define GDB_REG_A0 10 |
| 43 | #define GDB_REG_S2 18 |
| 44 | #define GDB_REG_T3 28 |
| 45 | #define GDB_REG_PC 32 |
| 46 | #define GDB_REG_CSR_BASE 65 |
| 47 | #define GDB_REG_SSTATUS (GDB_REG_CSR_BASE + 0x100) |
| 48 | #define GDB_REG_SCAUSE (GDB_REG_CSR_BASE + 0x142) |
| 49 | #define GDB_REG_STVAL (GDB_REG_CSR_BASE + 0x143) |
| 50 | _Static_assert(GDB_BUFSZ >= (GDB_NREGS * 8), "buffer fits 'g' regs"); |
| 51 | |
| 52 | static __inline size_t |
| 53 | gdb_cpu_regsz(int regnum __unused) |
| 54 | { |
| 55 | |
| 56 | return (8); |
| 57 | } |
| 58 | |
| 59 | static __inline int |
| 60 | gdb_cpu_query(void) |
| 61 | { |
| 62 | return (0); |
| 63 | } |
| 64 | |
| 65 | static __inline void * |
| 66 | gdb_begin_write(void) |
| 67 | { |
| 68 | |
| 69 | return (NULL); |
| 70 | } |
| 71 | |
| 72 | static __inline void |
| 73 | gdb_end_write(void *arg __unused) |
| 74 | { |
| 75 | |
| 76 | } |
| 77 | |
| 78 | static __inline void |
| 79 | gdb_cpu_stop_reason(int type __unused, int code __unused) |
| 80 | { |
| 81 | |
| 82 | } |
| 83 | |
| 84 | void *gdb_cpu_getreg(int, size_t *); |
| 85 | void gdb_cpu_setreg(int, void *); |
| 86 | int gdb_cpu_signal(int, int); |
| 87 | |
| 88 | #endif /* !_MACHINE_GDB_MACHDEP_H_ */ |