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 */ 147