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

   1/* gdb-stub.h: FRV GDB stub
   2 *
   3 * Copyright (C) 2003 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 License
   9 * as published by the Free Software Foundation; either version
  10 * 2 of the License, or (at your option) any later version.
  11 */
  12#ifndef __ASM_GDB_STUB_H
  13#define __ASM_GDB_STUB_H
  14
  15#undef GDBSTUB_DEBUG_IO
  16#undef GDBSTUB_DEBUG_PROTOCOL
  17
  18#include <asm/ptrace.h>
  19
  20/*
  21 * important register numbers in GDB protocol
  22 * - GR0,  GR1,  GR2,  GR3,  GR4,  GR5,  GR6,  GR7,
  23 * - GR8,  GR9,  GR10, GR11, GR12, GR13, GR14, GR15,
  24 * - GR16, GR17, GR18, GR19, GR20, GR21, GR22, GR23,
  25 * - GR24, GR25, GR26, GR27, GR28, GR29, GR30, GR31,
  26 * - GR32, GR33, GR34, GR35, GR36, GR37, GR38, GR39,
  27 * - GR40, GR41, GR42, GR43, GR44, GR45, GR46, GR47,
  28 * - GR48, GR49, GR50, GR51, GR52, GR53, GR54, GR55,
  29 * - GR56, GR57, GR58, GR59, GR60, GR61, GR62, GR63,
  30 * - FR0,  FR1,  FR2,  FR3,  FR4,  FR5,  FR6,  FR7,
  31 * - FR8,  FR9,  FR10, FR11, FR12, FR13, FR14, FR15,
  32 * - FR16, FR17, FR18, FR19, FR20, FR21, FR22, FR23,
  33 * - FR24, FR25, FR26, FR27, FR28, FR29, FR30, FR31,
  34 * - FR32, FR33, FR34, FR35, FR36, FR37, FR38, FR39,
  35 * - FR40, FR41, FR42, FR43, FR44, FR45, FR46, FR47,
  36 * - FR48, FR49, FR50, FR51, FR52, FR53, FR54, FR55,
  37 * - FR56, FR57, FR58, FR59, FR60, FR61, FR62, FR63,
  38 * - PC, PSR, CCR, CCCR,
  39 * - _X132, _X133, _X134
  40 * - TBR, BRR, DBAR0, DBAR1, DBAR2, DBAR3,
  41 * - SCR0, SCR1, SCR2, SCR3,
  42 * - LR, LCR,
  43 * - IACC0H, IACC0L,
  44 * - FSR0,
  45 * - ACC0, ACC1, ACC2, ACC3, ACC4, ACC5, ACC6, ACC7,
  46 * - ACCG0123, ACCG4567,
  47 * - MSR0, MSR1,
  48 * - GNER0, GNER1,
  49 * - FNER0, FNER1,
  50 */
  51#define GDB_REG_GR(N)   (N)
  52#define GDB_REG_FR(N)   (64+(N))
  53#define GDB_REG_PC      128
  54#define GDB_REG_PSR     129
  55#define GDB_REG_CCR     130
  56#define GDB_REG_CCCR    131
  57#define GDB_REG_TBR     135
  58#define GDB_REG_BRR     136
  59#define GDB_REG_DBAR(N) (137+(N))
  60#define GDB_REG_SCR(N)  (141+(N))
  61#define GDB_REG_LR      145
  62#define GDB_REG_LCR     146
  63#define GDB_REG_FSR0    149
  64#define GDB_REG_ACC(N)  (150+(N))
  65#define GDB_REG_ACCG(N) (158+(N)/4)
  66#define GDB_REG_MSR(N)  (160+(N))
  67#define GDB_REG_GNER(N) (162+(N))
  68#define GDB_REG_FNER(N) (164+(N))
  69
  70#define GDB_REG_SP      GDB_REG_GR(1)
  71#define GDB_REG_FP      GDB_REG_GR(2)
  72
  73#ifndef _LANGUAGE_ASSEMBLY
  74
  75/*
  76 * Prototypes
  77 */
  78extern void show_registers_only(struct pt_regs *regs);
  79
  80extern void gdbstub_init(void);
  81extern void gdbstub(int type);
  82extern void gdbstub_exit(int status);
  83
  84extern void gdbstub_io_init(void);
  85extern void gdbstub_set_baud(unsigned baud);
  86extern int gdbstub_rx_char(unsigned char *_ch, int nonblock);
  87extern void gdbstub_tx_char(unsigned char ch);
  88extern void gdbstub_tx_flush(void);
  89extern void gdbstub_do_rx(void);
  90
  91extern asmlinkage void __debug_stub_init_break(void);
  92extern asmlinkage void __break_hijack_kernel_event(void);
  93extern asmlinkage void __break_hijack_kernel_event_breaks_here(void);
  94
  95extern asmlinkage void gdbstub_rx_handler(void);
  96extern asmlinkage void gdbstub_rx_irq(void);
  97extern asmlinkage void gdbstub_intercept(void);
  98
  99extern uint32_t __entry_usertrap_table[];
 100extern uint32_t __entry_kerneltrap_table[];
 101
 102extern volatile u8      gdbstub_rx_buffer[PAGE_SIZE];
 103extern volatile u32     gdbstub_rx_inp;
 104extern volatile u32     gdbstub_rx_outp;
 105extern volatile u8      gdbstub_rx_overflow;
 106extern u8               gdbstub_rx_unget;
 107
 108extern void gdbstub_printk(const char *fmt, ...);
 109extern void debug_to_serial(const char *p, int n);
 110extern void console_set_baud(unsigned baud);
 111
 112#ifdef GDBSTUB_DEBUG_IO
 113#define gdbstub_io(FMT,...) gdbstub_printk(FMT, ##__VA_ARGS__)
 114#else
 115#define gdbstub_io(FMT,...) ({ 0; })
 116#endif
 117
 118#ifdef GDBSTUB_DEBUG_PROTOCOL
 119#define gdbstub_proto(FMT,...) gdbstub_printk(FMT,##__VA_ARGS__)
 120#else
 121#define gdbstub_proto(FMT,...) ({ 0; })
 122#endif
 123
 124/*
 125 * we dedicate GR31 to keeping a pointer to the gdbstub exception frame
 126 * - gr31 is destroyed on entry to the gdbstub if !MMU
 127 * - gr31 is saved in scr3 on entry to the gdbstub if in !MMU
 128 */
 129register struct frv_frame0 *__debug_frame0 asm("gr31");
 130
 131#define __debug_frame           (&__debug_frame0->regs)
 132#define __debug_user_context    (&__debug_frame0->uc)
 133#define __debug_regs            (&__debug_frame0->debug)
 134#define __debug_reg(X)          ((unsigned long *) ((unsigned long) &__debug_frame0 + (X)))
 135
 136struct frv_debug_status {
 137        unsigned long           bpsr;
 138        unsigned long           dcr;
 139        unsigned long           brr;
 140        unsigned long           nmar;
 141};
 142
 143extern struct frv_debug_status __debug_status;
 144
 145#endif /* _LANGUAGE_ASSEMBLY */
 146#endif /* __ASM_GDB_STUB_H */
 147