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-rw-r--r--include/asm-frv/gdb-stub.h140
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diff --git a/include/asm-frv/gdb-stub.h b/include/asm-frv/gdb-stub.h
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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 */
77extern void show_registers_only(struct pt_regs *regs);
78
79extern void gdbstub_init(void);
80extern void gdbstub(int type);
81extern void gdbstub_exit(int status);
82
83extern void gdbstub_io_init(void);
84extern void gdbstub_set_baud(unsigned baud);
85extern int gdbstub_rx_char(unsigned char *_ch, int nonblock);
86extern void gdbstub_tx_char(unsigned char ch);
87extern void gdbstub_tx_flush(void);
88extern void gdbstub_do_rx(void);
89
90extern asmlinkage void __debug_stub_init_break(void);
91extern asmlinkage void __break_hijack_kernel_event(void);
92extern asmlinkage void __break_hijack_kernel_event_breaks_here(void);
93extern asmlinkage void start_kernel(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_PROTOCOL
113#define gdbstub_proto(FMT,...) gdbstub_printk(FMT,##__VA_ARGS__)
114#else
115#define gdbstub_proto(FMT,...) ({ 0; })
116#endif
117
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 */
123register 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
130struct frv_debug_status {
131 unsigned long bpsr;
132 unsigned long dcr;
133 unsigned long brr;
134 unsigned long nmar;
135};
136
137extern struct frv_debug_status __debug_status;
138
139#endif /* _LANGUAGE_ASSEMBLY */
140#endif /* __ASM_GDB_STUB_H */
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