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
  78 struct 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  */
  96 extern void show_registers_only(struct pt_regs *regs);
  97
  98 extern asmlinkage void gdbstub_init(void);
  99 extern asmlinkage void gdbstub_exit(int status);
 100 extern asmlinkage void gdbstub_io_init(void);
 101 extern asmlinkage void gdbstub_io_set_baud(unsigned baud);
 102 extern asmlinkage int  gdbstub_io_rx_char(unsigned char *_ch, int nonblock);
 103 extern asmlinkage void gdbstub_io_tx_char(unsigned char ch);
 104 extern asmlinkage void gdbstub_io_tx_flush(void);
 105
 106 extern asmlinkage void gdbstub_io_rx_handler(void);
 107 extern asmlinkage void gdbstub_rx_irq(struct pt_regs *, enum exception_code);
 108 extern asmlinkage int  gdbstub_intercept(struct pt_regs *, enum exception_code);
 109 extern asmlinkage void gdbstub_exception(struct pt_regs *, enum exception_code);
 110 extern asmlinkage void __gdbstub_bug_trap(void);
 111 extern asmlinkage void __gdbstub_pause(void);
 112 extern asmlinkage void start_kernel(void);
 113
 114 #ifndef CONFIG_MN10300_CACHE_DISABLED
 115 extern asmlinkage void gdbstub_purge_cache(void);
 116 #else
 117 #define gdbstub_purge_cache()   do {} while (0)
 118 #endif
 119
 120 /* Used to prevent crashes in memory access */
 121 extern asmlinkage int  gdbstub_read_byte(const u8 *, u8 *);
 122 extern asmlinkage int  gdbstub_read_word(const u8 *, u8 *);
 123 extern asmlinkage int  gdbstub_read_dword(const u8 *, u8 *);
 124 extern asmlinkage int  gdbstub_write_byte(u32, u8 *);
 125 extern asmlinkage int  gdbstub_write_word(u32, u8 *);
 126 extern asmlinkage int  gdbstub_write_dword(u32, u8 *);
 127
 128 extern asmlinkage void gdbstub_read_byte_guard(void);
 129 extern asmlinkage void gdbstub_read_byte_cont(void);
 130 extern asmlinkage void gdbstub_read_word_guard(void);
 131 extern asmlinkage void gdbstub_read_word_cont(void);
 132 extern asmlinkage void gdbstub_read_dword_guard(void);
 133 extern asmlinkage void gdbstub_read_dword_cont(void);
 134 extern asmlinkage void gdbstub_write_byte_guard(void);
 135 extern asmlinkage void gdbstub_write_byte_cont(void);
 136 extern asmlinkage void gdbstub_write_word_guard(void);
 137 extern asmlinkage void gdbstub_write_word_cont(void);
 138 extern asmlinkage void gdbstub_write_dword_guard(void);
 139 extern asmlinkage void gdbstub_write_dword_cont(void);
 140
 141 extern u8       gdbstub_rx_buffer[PAGE_SIZE];
 142 extern u32      gdbstub_rx_inp;
 143 extern u32      gdbstub_rx_outp;
 144 extern u8       gdbstub_rx_overflow;
 145 extern u8       gdbstub_busy;
 146 extern u8       gdbstub_rx_unget;
 147
 148 #ifdef CONFIG_GDBSTUB_DEBUGGING
 149 extern void gdbstub_printk(const char *fmt, ...)
 150         __attribute__((format(printf, 1, 2)));
 151 #else
 152 static inline __attribute__((format(printf, 1, 2)))
 153 void gdbstub_printk(const char *fmt, ...)
 154 {
 155 }
 156 #endif
 157
 158 #ifdef CONFIG_GDBSTUB_DEBUG_ENTRY
 159 #define gdbstub_entry(FMT, ...) gdbstub_printk(FMT, ##__VA_ARGS__)
 160 #else
 161 #define gdbstub_entry(FMT, ...) ({ 0; })
 162 #endif
 163
 164 #ifdef CONFIG_GDBSTUB_DEBUG_PROTOCOL
 165 #define gdbstub_proto(FMT, ...) gdbstub_printk(FMT, ##__VA_ARGS__)
 166 #else
 167 #define gdbstub_proto(FMT, ...) ({ 0; })
 168 #endif
 169
 170 #ifdef CONFIG_GDBSTUB_DEBUG_IO
 171 #define gdbstub_io(FMT, ...) gdbstub_printk(FMT, ##__VA_ARGS__)
 172 #else
 173 #define gdbstub_io(FMT, ...) ({ 0; })
 174 #endif
 175
 176 #ifdef CONFIG_GDBSTUB_DEBUG_BREAKPOINT
 177 #define gdbstub_bkpt(FMT, ...) gdbstub_printk(FMT, ##__VA_ARGS__)
 178 #else
 179 #define gdbstub_bkpt(FMT, ...) ({ 0; })
 180 #endif
 181
 182 #endif /* !__ASSEMBLY__ */
 183 #endif /* _ASM_GDB_STUB_H */