/* gdb-stub.h: FRV GDB stub
*
* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
* Written by David Howells ([email protected])
* - Derived from asm-mips/gdb-stub.h (c) 1995 Andreas Busse
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef __ASM_GDB_STUB_H
#define __ASM_GDB_STUB_H

#undef GDBSTUB_DEBUG_IO
#undef GDBSTUB_DEBUG_PROTOCOL

#include <asm/ptrace.h>

/*
* important register numbers in GDB protocol
* - GR0, GR1, GR2, GR3, GR4, GR5, GR6, GR7,
* - GR8, GR9, GR10, GR11, GR12, GR13, GR14, GR15,
* - GR16, GR17, GR18, GR19, GR20, GR21, GR22, GR23,
* - GR24, GR25, GR26, GR27, GR28, GR29, GR30, GR31,
* - GR32, GR33, GR34, GR35, GR36, GR37, GR38, GR39,
* - GR40, GR41, GR42, GR43, GR44, GR45, GR46, GR47,
* - GR48, GR49, GR50, GR51, GR52, GR53, GR54, GR55,
* - GR56, GR57, GR58, GR59, GR60, GR61, GR62, GR63,
* - FR0, FR1, FR2, FR3, FR4, FR5, FR6, FR7,
* - FR8, FR9, FR10, FR11, FR12, FR13, FR14, FR15,
* - FR16, FR17, FR18, FR19, FR20, FR21, FR22, FR23,
* - FR24, FR25, FR26, FR27, FR28, FR29, FR30, FR31,
* - FR32, FR33, FR34, FR35, FR36, FR37, FR38, FR39,
* - FR40, FR41, FR42, FR43, FR44, FR45, FR46, FR47,
* - FR48, FR49, FR50, FR51, FR52, FR53, FR54, FR55,
* - FR56, FR57, FR58, FR59, FR60, FR61, FR62, FR63,
* - PC, PSR, CCR, CCCR,
* - _X132, _X133, _X134
* - TBR, BRR, DBAR0, DBAR1, DBAR2, DBAR3,
* - SCR0, SCR1, SCR2, SCR3,
* - LR, LCR,
* - IACC0H, IACC0L,
* - FSR0,
* - ACC0, ACC1, ACC2, ACC3, ACC4, ACC5, ACC6, ACC7,
* - ACCG0123, ACCG4567,
* - MSR0, MSR1,
* - GNER0, GNER1,
* - FNER0, FNER1,
*/
#define GDB_REG_GR(N) (N)
#define GDB_REG_FR(N) (64+(N))
#define GDB_REG_PC 128
#define GDB_REG_PSR 129
#define GDB_REG_CCR 130
#define GDB_REG_CCCR 131
#define GDB_REG_TBR 135
#define GDB_REG_BRR 136
#define GDB_REG_DBAR(N) (137+(N))
#define GDB_REG_SCR(N) (141+(N))
#define GDB_REG_LR 145
#define GDB_REG_LCR 146
#define GDB_REG_FSR0 149
#define GDB_REG_ACC(N) (150+(N))
#define GDB_REG_ACCG(N) (158+(N)/4)
#define GDB_REG_MSR(N) (160+(N))
#define GDB_REG_GNER(N) (162+(N))
#define GDB_REG_FNER(N) (164+(N))

#define GDB_REG_SP GDB_REG_GR(1)
#define GDB_REG_FP GDB_REG_GR(2)

#ifndef _LANGUAGE_ASSEMBLY

/*
* Prototypes
*/
extern void show_registers_only(struct pt_regs *regs);

extern void gdbstub_init(void);
extern void gdbstub(int type);
extern void gdbstub_exit(int status);

extern void gdbstub_io_init(void);
extern void gdbstub_set_baud(unsigned baud);
extern int gdbstub_rx_char(unsigned char *_ch, int nonblock);
extern void gdbstub_tx_char(unsigned char ch);
extern void gdbstub_tx_flush(void);
extern void gdbstub_do_rx(void);

extern asmlinkage void __debug_stub_init_break(void);
extern asmlinkage void __break_hijack_kernel_event(void);
extern asmlinkage void __break_hijack_kernel_event_breaks_here(void);

extern asmlinkage void gdbstub_rx_handler(void);
extern asmlinkage void gdbstub_rx_irq(void);
extern asmlinkage void gdbstub_intercept(void);

extern uint32_t __entry_usertrap_table[];
extern uint32_t __entry_kerneltrap_table[];

extern volatile u8 gdbstub_rx_buffer[PAGE_SIZE];
extern volatile u32 gdbstub_rx_inp;
extern volatile u32 gdbstub_rx_outp;
extern volatile u8 gdbstub_rx_overflow;
extern u8 gdbstub_rx_unget;

extern void gdbstub_printk(const char *fmt, ...);
extern void debug_to_serial(const char *p, int n);
extern void console_set_baud(unsigned baud);

#ifdef GDBSTUB_DEBUG_IO
#define gdbstub_io(FMT,...) gdbstub_printk(FMT, ##__VA_ARGS__)
#else
#define gdbstub_io(FMT,...) ({ 0; })
#endif

#ifdef GDBSTUB_DEBUG_PROTOCOL
#define gdbstub_proto(FMT,...) gdbstub_printk(FMT,##__VA_ARGS__)
#else
#define gdbstub_proto(FMT,...) ({ 0; })
#endif

/*
* we dedicate GR31 to keeping a pointer to the gdbstub exception frame
* - gr31 is destroyed on entry to the gdbstub if !MMU
* - gr31 is saved in scr3 on entry to the gdbstub if in !MMU
*/
register struct frv_frame0 *__debug_frame0 asm("gr31");

#define __debug_frame (&__debug_frame0->regs)
#define __debug_user_context (&__debug_frame0->uc)
#define __debug_regs (&__debug_frame0->debug)
#define __debug_reg(X) ((unsigned long *) ((unsigned long) &__debug_frame0 + (X)))

struct frv_debug_status {
unsigned long bpsr;
unsigned long dcr;
unsigned long brr;
unsigned long nmar;
};

extern struct frv_debug_status __debug_status;

#endif /* _LANGUAGE_ASSEMBLY */
#endif /* __ASM_GDB_STUB_H */