1/* MN10300 Kernel GDB stub definitions 2 * 3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * - Derived from asm-mips/gdb-stub.h (c) 1995 Andreas Busse 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public Licence 9 * as published by the Free Software Foundation; either version 10 * 2 of the Licence, or (at your option) any later version. 11 */ 12#ifndef _ASM_GDB_STUB_H 13#define _ASM_GDB_STUB_H 14 15#include <asm/exceptions.h> 16 17/* 18 * register ID numbers in GDB remote protocol 19 */ 20 21#define GDB_REGID_PC 9 22#define GDB_REGID_FP 7 23#define GDB_REGID_SP 8 24 25/* 26 * virtual stack layout for the GDB exception handler 27 */ 28#define NUMREGS 64 29 30#define GDB_FR_D0 (0 * 4) 31#define GDB_FR_D1 (1 * 4) 32#define GDB_FR_D2 (2 * 4) 33#define GDB_FR_D3 (3 * 4) 34#define GDB_FR_A0 (4 * 4) 35#define GDB_FR_A1 (5 * 4) 36#define GDB_FR_A2 (6 * 4) 37#define GDB_FR_A3 (7 * 4) 38 39#define GDB_FR_SP (8 * 4) 40#define GDB_FR_PC (9 * 4) 41#define GDB_FR_MDR (10 * 4) 42#define GDB_FR_EPSW (11 * 4) 43#define GDB_FR_LIR (12 * 4) 44#define GDB_FR_LAR (13 * 4) 45#define GDB_FR_MDRQ (14 * 4) 46 47#define GDB_FR_E0 (15 * 4) 48#define GDB_FR_E1 (16 * 4) 49#define GDB_FR_E2 (17 * 4) 50#define GDB_FR_E3 (18 * 4) 51#define GDB_FR_E4 (19 * 4) 52#define GDB_FR_E5 (20 * 4) 53#define GDB_FR_E6 (21 * 4) 54#define GDB_FR_E7 (22 * 4) 55 56#define GDB_FR_SSP (23 * 4) 57#define GDB_FR_MSP (24 * 4) 58#define GDB_FR_USP (25 * 4) 59#define GDB_FR_MCRH (26 * 4) 60#define GDB_FR_MCRL (27 * 4) 61#define GDB_FR_MCVF (28 * 4) 62 63#define GDB_FR_FPCR (29 * 4) 64#define GDB_FR_DUMMY0 (30 * 4) 65#define GDB_FR_DUMMY1 (31 * 4) 66 67#define GDB_FR_FS0 (32 * 4) 68 69#define GDB_FR_SIZE (NUMREGS * 4) 70 71#ifndef __ASSEMBLY__ 72 73/* 74 * This is the same as above, but for the high-level 75 * part of the GDB stub. 76 */ 77 78struct gdb_regs { 79 /* saved main processor registers */ 80 u32 d0, d1, d2, d3, a0, a1, a2, a3; 81 u32 sp, pc, mdr, epsw, lir, lar, mdrq; 82 u32 e0, e1, e2, e3, e4, e5, e6, e7; 83 u32 ssp, msp, usp, mcrh, mcrl, mcvf; 84 85 /* saved floating point registers */ 86 u32 fpcr, _dummy0, _dummy1; 87 u32 fs0, fs1, fs2, fs3, fs4, fs5, fs6, fs7; 88 u32 fs8, fs9, fs10, fs11, fs12, fs13, fs14, fs15; 89 u32 fs16, fs17, fs18, fs19, fs20, fs21, fs22, fs23; 90 u32 fs24, fs25, fs26, fs27, fs28, fs29, fs30, fs31; 91}; 92 93/* 94 * Prototypes 95 */ 96extern void show_registers_only(struct pt_regs *regs); 97 98extern asmlinkage void gdbstub_init(void); 99extern asmlinkage void gdbstub_exit(int status); 100extern asmlinkage void gdbstub_io_init(void); 101extern asmlinkage void gdbstub_io_set_baud(unsigned baud); 102extern asmlinkage int gdbstub_io_rx_char(unsigned char *_ch, int nonblock); 103extern asmlinkage void gdbstub_io_tx_char(unsigned char ch); 104extern asmlinkage void gdbstub_io_tx_flush(void); 105 106extern asmlinkage void gdbstub_io_rx_handler(void); 107extern asmlinkage void gdbstub_rx_irq(struct pt_regs *, enum exception_code); 108extern asmlinkage int gdbstub_intercept(struct pt_regs *, enum exception_code); 109extern asmlinkage void gdbstub_exception(struct pt_regs *, enum exception_code); 110extern asmlinkage void __gdbstub_bug_trap(void); 111extern asmlinkage void __gdbstub_pause(void); 112 113#ifndef CONFIG_MN10300_CACHE_DISABLED 114extern asmlinkage void gdbstub_purge_cache(void); 115#else 116#define gdbstub_purge_cache() do {} while (0) 117#endif 118 119/* Used to prevent crashes in memory access */ 120extern asmlinkage int gdbstub_read_byte(const u8 *, u8 *); 121extern asmlinkage int gdbstub_read_word(const u8 *, u8 *); 122extern asmlinkage int gdbstub_read_dword(const u8 *, u8 *); 123extern asmlinkage int gdbstub_write_byte(u32, u8 *); 124extern asmlinkage int gdbstub_write_word(u32, u8 *); 125extern asmlinkage int gdbstub_write_dword(u32, u8 *); 126 127extern asmlinkage void gdbstub_read_byte_guard(void); 128extern asmlinkage void gdbstub_read_byte_cont(void); 129extern asmlinkage void gdbstub_read_word_guard(void); 130extern asmlinkage void gdbstub_read_word_cont(void); 131extern asmlinkage void gdbstub_read_dword_guard(void); 132extern asmlinkage void gdbstub_read_dword_cont(void); 133extern asmlinkage void gdbstub_write_byte_guard(void); 134extern asmlinkage void gdbstub_write_byte_cont(void); 135extern asmlinkage void gdbstub_write_word_guard(void); 136extern asmlinkage void gdbstub_write_word_cont(void); 137extern asmlinkage void gdbstub_write_dword_guard(void); 138extern asmlinkage void gdbstub_write_dword_cont(void); 139 140extern u8 gdbstub_rx_buffer[PAGE_SIZE]; 141extern u32 gdbstub_rx_inp; 142extern u32 gdbstub_rx_outp; 143extern u8 gdbstub_rx_overflow; 144extern u8 gdbstub_busy; 145extern u8 gdbstub_rx_unget; 146 147#ifdef CONFIG_GDBSTUB_DEBUGGING 148extern void gdbstub_printk(const char *fmt, ...) 149 __attribute__((format(printf, 1, 2))); 150#else 151static inline __attribute__((format(printf, 1, 2))) 152void gdbstub_printk(const char *fmt, ...) 153{ 154} 155#endif 156 157#ifdef CONFIG_GDBSTUB_DEBUG_ENTRY 158#define gdbstub_entry(FMT, ...) gdbstub_printk(FMT, ##__VA_ARGS__) 159#else 160#define gdbstub_entry(FMT, ...) no_printk(FMT, ##__VA_ARGS__) 161#endif 162 163#ifdef CONFIG_GDBSTUB_DEBUG_PROTOCOL 164#define gdbstub_proto(FMT, ...) gdbstub_printk(FMT, ##__VA_ARGS__) 165#else 166#define gdbstub_proto(FMT, ...) no_printk(FMT, ##__VA_ARGS__) 167#endif 168 169#ifdef CONFIG_GDBSTUB_DEBUG_IO 170#define gdbstub_io(FMT, ...) gdbstub_printk(FMT, ##__VA_ARGS__) 171#else 172#define gdbstub_io(FMT, ...) no_printk(FMT, ##__VA_ARGS__) 173#endif 174 175#ifdef CONFIG_GDBSTUB_DEBUG_BREAKPOINT 176#define gdbstub_bkpt(FMT, ...) gdbstub_printk(FMT, ##__VA_ARGS__) 177#else 178#define gdbstub_bkpt(FMT, ...) no_printk(FMT, ##__VA_ARGS__) 179#endif 180 181#endif /* !__ASSEMBLY__ */ 182#endif /* _ASM_GDB_STUB_H */ 183