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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_PROTOCOL | |
16 | ||
17 | #include <asm/ptrace.h> | |
18 | ||
19 | /* | |
20 | * important register numbers in GDB protocol | |
21 | * - GR0, GR1, GR2, GR3, GR4, GR5, GR6, GR7, | |
22 | * - GR8, GR9, GR10, GR11, GR12, GR13, GR14, GR15, | |
23 | * - GR16, GR17, GR18, GR19, GR20, GR21, GR22, GR23, | |
24 | * - GR24, GR25, GR26, GR27, GR28, GR29, GR30, GR31, | |
25 | * - GR32, GR33, GR34, GR35, GR36, GR37, GR38, GR39, | |
26 | * - GR40, GR41, GR42, GR43, GR44, GR45, GR46, GR47, | |
27 | * - GR48, GR49, GR50, GR51, GR52, GR53, GR54, GR55, | |
28 | * - GR56, GR57, GR58, GR59, GR60, GR61, GR62, GR63, | |
29 | * - FR0, FR1, FR2, FR3, FR4, FR5, FR6, FR7, | |
30 | * - FR8, FR9, FR10, FR11, FR12, FR13, FR14, FR15, | |
31 | * - FR16, FR17, FR18, FR19, FR20, FR21, FR22, FR23, | |
32 | * - FR24, FR25, FR26, FR27, FR28, FR29, FR30, FR31, | |
33 | * - FR32, FR33, FR34, FR35, FR36, FR37, FR38, FR39, | |
34 | * - FR40, FR41, FR42, FR43, FR44, FR45, FR46, FR47, | |
35 | * - FR48, FR49, FR50, FR51, FR52, FR53, FR54, FR55, | |
36 | * - FR56, FR57, FR58, FR59, FR60, FR61, FR62, FR63, | |
37 | * - PC, PSR, CCR, CCCR, | |
38 | * - _X132, _X133, _X134 | |
39 | * - TBR, BRR, DBAR0, DBAR1, DBAR2, DBAR3, | |
40 | * - SCR0, SCR1, SCR2, SCR3, | |
41 | * - LR, LCR, | |
42 | * - IACC0H, IACC0L, | |
43 | * - FSR0, | |
44 | * - ACC0, ACC1, ACC2, ACC3, ACC4, ACC5, ACC6, ACC7, | |
45 | * - ACCG0123, ACCG4567, | |
46 | * - MSR0, MSR1, | |
47 | * - GNER0, GNER1, | |
48 | * - FNER0, FNER1, | |
49 | */ | |
50 | #define GDB_REG_GR(N) (N) | |
51 | #define GDB_REG_FR(N) (64+(N)) | |
52 | #define GDB_REG_PC 128 | |
53 | #define GDB_REG_PSR 129 | |
54 | #define GDB_REG_CCR 130 | |
55 | #define GDB_REG_CCCR 131 | |
56 | #define GDB_REG_TBR 135 | |
57 | #define GDB_REG_BRR 136 | |
58 | #define GDB_REG_DBAR(N) (137+(N)) | |
59 | #define GDB_REG_SCR(N) (141+(N)) | |
60 | #define GDB_REG_LR 145 | |
61 | #define GDB_REG_LCR 146 | |
62 | #define GDB_REG_FSR0 149 | |
63 | #define GDB_REG_ACC(N) (150+(N)) | |
64 | #define GDB_REG_ACCG(N) (158+(N)/4) | |
65 | #define GDB_REG_MSR(N) (160+(N)) | |
66 | #define GDB_REG_GNER(N) (162+(N)) | |
67 | #define GDB_REG_FNER(N) (164+(N)) | |
68 | ||
69 | #define GDB_REG_SP GDB_REG_GR(1) | |
70 | #define GDB_REG_FP GDB_REG_GR(2) | |
71 | ||
72 | #ifndef _LANGUAGE_ASSEMBLY | |
73 | ||
74 | /* | |
75 | * Prototypes | |
76 | */ | |
77 | extern void show_registers_only(struct pt_regs *regs); | |
78 | ||
79 | extern void gdbstub_init(void); | |
80 | extern void gdbstub(int type); | |
81 | extern void gdbstub_exit(int status); | |
82 | ||
83 | extern void gdbstub_io_init(void); | |
84 | extern void gdbstub_set_baud(unsigned baud); | |
85 | extern int gdbstub_rx_char(unsigned char *_ch, int nonblock); | |
86 | extern void gdbstub_tx_char(unsigned char ch); | |
87 | extern void gdbstub_tx_flush(void); | |
88 | extern void gdbstub_do_rx(void); | |
89 | ||
90 | extern asmlinkage void __debug_stub_init_break(void); | |
91 | extern asmlinkage void __break_hijack_kernel_event(void); | |
84e8cd6d | 92 | extern asmlinkage void __break_hijack_kernel_event_breaks_here(void); |
1da177e4 LT |
93 | extern asmlinkage void start_kernel(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_PROTOCOL | |
113 | #define gdbstub_proto(FMT,...) gdbstub_printk(FMT,##__VA_ARGS__) | |
114 | #else | |
115 | #define gdbstub_proto(FMT,...) ({ 0; }) | |
116 | #endif | |
117 | ||
84e8cd6d DH |
118 | /* |
119 | * we dedicate GR31 to keeping a pointer to the gdbstub exception frame | |
120 | * - gr31 is destroyed on entry to the gdbstub if !MMU | |
121 | * - gr31 is saved in scr3 on entry to the gdbstub if in !MMU | |
122 | */ | |
123 | register struct frv_frame0 *__debug_frame0 asm("gr31"); | |
124 | ||
125 | #define __debug_frame (&__debug_frame0->regs) | |
126 | #define __debug_user_context (&__debug_frame0->uc) | |
127 | #define __debug_regs (&__debug_frame0->debug) | |
128 | #define __debug_reg(X) ((unsigned long *) ((unsigned long) &__debug_frame0 + (X))) | |
129 | ||
130 | struct frv_debug_status { | |
131 | unsigned long bpsr; | |
132 | unsigned long dcr; | |
133 | unsigned long brr; | |
134 | unsigned long nmar; | |
135 | }; | |
136 | ||
137 | extern struct frv_debug_status __debug_status; | |
138 | ||
1da177e4 LT |
139 | #endif /* _LANGUAGE_ASSEMBLY */ |
140 | #endif /* __ASM_GDB_STUB_H */ |