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  */
  78 extern void show_registers_only(struct pt_regs *regs);
  79
  80 extern void gdbstub_init(void);
  81 extern void gdbstub(int type);
  82 extern void gdbstub_exit(int status);
  83
  84 extern void gdbstub_io_init(void);
  85 extern void gdbstub_set_baud(unsigned baud);
  86 extern int gdbstub_rx_char(unsigned char *_ch, int nonblock);
  87 extern void gdbstub_tx_char(unsigned char ch);
  88 extern void gdbstub_tx_flush(void);
  89 extern void gdbstub_do_rx(void);
  90
  91 extern asmlinkage void __debug_stub_init_break(void);
  92 extern asmlinkage void __break_hijack_kernel_event(void);
  93 extern asmlinkage void __break_hijack_kernel_event_breaks_here(void);
  94
  95 extern asmlinkage void gdbstub_rx_handler(void);
  96 extern asmlinkage void gdbstub_rx_irq(void);
  97 extern asmlinkage void gdbstub_intercept(void);
  98
  99 extern uint32_t __entry_usertrap_table[];
 100 extern uint32_t __entry_kerneltrap_table[];
 101
 102 extern volatile u8      gdbstub_rx_buffer[PAGE_SIZE];
 103 extern volatile u32     gdbstub_rx_inp;
 104 extern volatile u32     gdbstub_rx_outp;
 105 extern volatile u8      gdbstub_rx_overflow;
 106 extern u8               gdbstub_rx_unget;
 107
 108 extern void gdbstub_printk(const char *fmt, ...);
 109 extern void debug_to_serial(const char *p, int n);
 110 extern 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  */
 129 register 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
 136 struct frv_debug_status {
 137         unsigned long           bpsr;
 138         unsigned long           dcr;
 139         unsigned long           brr;
 140         unsigned long           nmar;
 141 };
 142
 143 extern struct frv_debug_status __debug_status;
 144
 145 #endif /* _LANGUAGE_ASSEMBLY */
 146 #endif /* __ASM_GDB_STUB_H */