LXR linux/arch/mn10300/include/asm/gdb-stub.h

   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#ifdef CONFIG_MN10300_CACHE_ENABLED
 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