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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/frv/include/asm/gdb-stub.h
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/* gdb-stub.h: FRV GDB stub

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 *

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 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.

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 * Written by David Howells ([email protected])

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 * - Derived from asm-mips/gdb-stub.h (c) 1995 Andreas Busse

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 *

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 * This program is free software; you can redistribute it and/or

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 * modify it under the terms of the GNU General Public License

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 * as published by the Free Software Foundation; either version

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 * 2 of the License, or (at your option) any later version.

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 */

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#ifndef __ASM_GDB_STUB_H

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#define __ASM_GDB_STUB_H

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#undef GDBSTUB_DEBUG_IO

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#undef GDBSTUB_DEBUG_PROTOCOL

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#include <asm/ptrace.h>

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/*

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 * important register numbers in GDB protocol

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 * - GR0,  GR1,  GR2,  GR3,  GR4,  GR5,  GR6,  GR7,

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 * - GR8,  GR9,  GR10, GR11, GR12, GR13, GR14, GR15,

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 * - GR16, GR17, GR18, GR19, GR20, GR21, GR22, GR23,

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 * - GR24, GR25, GR26, GR27, GR28, GR29, GR30, GR31,

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 * - GR32, GR33, GR34, GR35, GR36, GR37, GR38, GR39,

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 * - GR40, GR41, GR42, GR43, GR44, GR45, GR46, GR47,

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 * - GR48, GR49, GR50, GR51, GR52, GR53, GR54, GR55,

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 * - GR56, GR57, GR58, GR59, GR60, GR61, GR62, GR63,

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 * - FR0,  FR1,  FR2,  FR3,  FR4,  FR5,  FR6,  FR7,

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 * - FR8,  FR9,  FR10, FR11, FR12, FR13, FR14, FR15,

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 * - FR16, FR17, FR18, FR19, FR20, FR21, FR22, FR23,

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 * - FR24, FR25, FR26, FR27, FR28, FR29, FR30, FR31,

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 * - FR32, FR33, FR34, FR35, FR36, FR37, FR38, FR39,

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 * - FR40, FR41, FR42, FR43, FR44, FR45, FR46, FR47,

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 * - FR48, FR49, FR50, FR51, FR52, FR53, FR54, FR55,

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 * - FR56, FR57, FR58, FR59, FR60, FR61, FR62, FR63,

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 * - PC, PSR, CCR, CCCR,

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 * - _X132, _X133, _X134

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 * - TBR, BRR, DBAR0, DBAR1, DBAR2, DBAR3,

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 * - SCR0, SCR1, SCR2, SCR3,

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 * - LR, LCR,

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 * - IACC0H, IACC0L,

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 * - FSR0,

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 * - ACC0, ACC1, ACC2, ACC3, ACC4, ACC5, ACC6, ACC7,

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 * - ACCG0123, ACCG4567,

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 * - MSR0, MSR1,

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 * - GNER0, GNER1,

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 * - FNER0, FNER1,

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 */

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#define GDB_REG_GR(N)	(N)

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#define GDB_REG_FR(N)	(64+(N))

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#define GDB_REG_PC	128

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#define GDB_REG_PSR	129

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#define GDB_REG_CCR	130

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#define GDB_REG_CCCR	131

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#define GDB_REG_TBR	135

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#define GDB_REG_BRR	136

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#define GDB_REG_DBAR(N)	(137+(N))

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#define GDB_REG_SCR(N)	(141+(N))

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#define GDB_REG_LR	145

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#define GDB_REG_LCR	146

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#define GDB_REG_FSR0	149

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#define GDB_REG_ACC(N)	(150+(N))

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#define GDB_REG_ACCG(N)	(158+(N)/4)

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#define GDB_REG_MSR(N)	(160+(N))

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#define GDB_REG_GNER(N)	(162+(N))

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#define GDB_REG_FNER(N)	(164+(N))

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#define GDB_REG_SP	GDB_REG_GR(1)

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#define GDB_REG_FP	GDB_REG_GR(2)

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#ifndef _LANGUAGE_ASSEMBLY

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/*

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 * Prototypes

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 */

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extern void show_registers_only(struct pt_regs *regs);

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extern void gdbstub_init(void);

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extern void gdbstub(int type);

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extern void gdbstub_exit(int status);

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extern void gdbstub_io_init(void);

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extern void gdbstub_set_baud(unsigned baud);

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extern int gdbstub_rx_char(unsigned char *_ch, int nonblock);

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extern void gdbstub_tx_char(unsigned char ch);

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extern void gdbstub_tx_flush(void);

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extern void gdbstub_do_rx(void);

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extern asmlinkage void __debug_stub_init_break(void);

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extern asmlinkage void __break_hijack_kernel_event(void);

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extern asmlinkage void __break_hijack_kernel_event_breaks_here(void);

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extern asmlinkage void gdbstub_rx_handler(void);

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extern asmlinkage void gdbstub_rx_irq(void);

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extern asmlinkage void gdbstub_intercept(void);

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extern uint32_t __entry_usertrap_table[];

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extern uint32_t __entry_kerneltrap_table[];

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extern volatile u8	gdbstub_rx_buffer[PAGE_SIZE];

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extern volatile u32	gdbstub_rx_inp;

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extern volatile u32	gdbstub_rx_outp;

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extern volatile u8	gdbstub_rx_overflow;

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extern u8		gdbstub_rx_unget;

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extern void gdbstub_printk(const char *fmt, ...);

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extern void debug_to_serial(const char *p, int n);

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extern void console_set_baud(unsigned baud);

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#ifdef GDBSTUB_DEBUG_IO

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#define gdbstub_io(FMT,...) gdbstub_printk(FMT, ##__VA_ARGS__)

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#else

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#define gdbstub_io(FMT,...) ({ 0; })

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#endif

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#ifdef GDBSTUB_DEBUG_PROTOCOL

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#define gdbstub_proto(FMT,...) gdbstub_printk(FMT,##__VA_ARGS__)

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#else

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#define gdbstub_proto(FMT,...) ({ 0; })

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#endif

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/*

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 * we dedicate GR31 to keeping a pointer to the gdbstub exception frame

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 * - gr31 is destroyed on entry to the gdbstub if !MMU

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 * - gr31 is saved in scr3 on entry to the gdbstub if in !MMU

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 */

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register struct frv_frame0 *__debug_frame0 asm("gr31");

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#define __debug_frame		(&__debug_frame0->regs)

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#define __debug_user_context	(&__debug_frame0->uc)

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#define __debug_regs		(&__debug_frame0->debug)

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#define __debug_reg(X)		((unsigned long *) ((unsigned long) &__debug_frame0 + (X)))

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struct frv_debug_status {

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	unsigned long		bpsr;

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	unsigned long		dcr;

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	unsigned long		brr;

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	unsigned long		nmar;

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};

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extern struct frv_debug_status __debug_status;

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#endif /* _LANGUAGE_ASSEMBLY */

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#endif /* __ASM_GDB_STUB_H */

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