Subversion Repositories openrisc

//========================================================================

//

//      openrisc_stub.h

//

//      OpenRISC-specific definitions for remote debugging via gdb

//

//========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

// eCos 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 or (at your option) any later version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT ANY

// WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):   sfurman

// Contributors:Red Hat, nickg, dmoseley

// Date:        2003-02-18

// Purpose:     OpenRISC-specific definitions for gdb stubs support

//              

//

//####DESCRIPTIONEND####

//

//=============================================================================

#ifndef CYGONCE_HAL_OPENRISC_STUB_H

#define CYGONCE_HAL_OPENRISC_STUB_H

#include <pkgconf/system.h>

#include <pkgconf/hal.h>

#ifdef CYGPKG_IO_SERIAL

#include <pkgconf/io_serial.h>

#endif

#include <cyg/hal/hal_diag.h>

#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

#include <cyg/infra/cyg_type.h>         // CYG_UNUSED_PARAM, externC

#define HAL_STUB_PLATFORM_INIT_SERIAL()       HAL_DIAG_INIT()

#define HAL_STUB_PLATFORM_GET_CHAR()                                        \

((cyg_int8)({                                                               \

    cyg_int8 _ch_;                                                          \

    HAL_DIAG_READ_CHAR(_ch_);                                               \

    _ch_;                                                                   \

}))

#define HAL_STUB_PLATFORM_PUT_CHAR(c)         HAL_DIAG_WRITE_CHAR((c))

#define HAL_STUB_PLATFORM_SET_BAUD_RATE(baud) CYG_UNUSED_PARAM(int,(baud))

#define HAL_STUB_PLATFORM_RESET()             HAL_DIAG_INIT()

#define HAL_STUB_PLATFORM_INIT()              HAL_DIAG_INIT()

#endif // ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

// 32 GPRs + 32 VFRs + PC reg + SR reg

#define NUMREGS 66

// VFR regs are unimplemented so they are 0 bytes in length

#define REGSIZE( _x_ ) ((((_x_) <= R31) || ((_x_) > VFR31)) ? 4 : 0)

typedef unsigned long target_register_t;

enum regnames {

     R0,   SP,   R2,   R3,   R4,   R5,   R6,   R7,

     R8,   R9,  R10,  R11,  R12,  R13,  R14,  R15,

    R16,  R17,  R18,  R19,  R20,  R21,  R22,  R23,

    R24,  R25,  R26,  R27,  R28,  R29,  R30,  R31,

     // Vector/Float registers, which are as yet unimplemented,

     // but defined in the or32 gdb back-end.

    VFR0,  VFR1,  VFR2,  VFR3,  VFR4,  VFR5,  VFR6,  VFR7,

    VFR8,  VFR9, VFR10, VFR11, VFR12, VFR13, VFR14, VFR15,

   VFR16, VFR17, VFR18, VFR19, VFR20, VFR21, VFR22, VFR23,

   VFR24, VFR25, VFR26, VFR27, VFR28, VFR29, VFR30, VFR31,

     // Special-purpose registers

      PC,    SR

};

typedef enum regnames regnames_t;

// Override generic stubs get_register() and use arch-specific version

#define CYGARC_STUB_REGISTER_ACCESS_DEFINED

#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT) || defined(CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT)

#define HAL_GET_PROFILE_INFO( _thepc_, _thesp_ )                \

    CYG_MACRO_START                                             \

    extern HAL_SavedRegisters *hal_saved_interrupt_state;       \

    if ( hal_saved_interrupt_state ) {                          \

        (_thepc_) = (char *)(hal_saved_interrupt_state->pc);    \

        (_thesp_) = (char *)(hal_saved_interrupt_state->sp);    \

    }                                                           \

    CYG_MACRO_END

#endif

/* Given a trap value TRAP, return the corresponding signal. */

externC int __computeSignal (unsigned int trap_number);

/* Return the trap number corresponding to the last-taken trap. */

externC int __get_trap_number (void);

/* Return the currently-saved value corresponding to register REG. */

externC target_register_t get_register (regnames_t reg);

/* Store VALUE in the register corresponding to WHICH. */

externC void put_register (regnames_t which, target_register_t value);

/* Set the currently-saved pc register value to PC. This also updates NPC

   as needed. */

externC void set_pc (target_register_t pc);

/* Set things up so that the next user resume will execute one instruction.

   This may be done by setting breakpoints or setting a single step flag

   in the saved user registers, for example. */

externC void __single_step (void);

/* Clear the single-step state. */

externC void __clear_single_step (void);

/* If the breakpoint we hit is in the breakpoint() instruction, return a

   non-zero value. */

externC int __is_breakpoint_function (void);

/* Skip the current instruction. */

externC void __skipinst (void);

externC void __install_breakpoints (void);

externC void __clear_breakpoints (void);

#endif // ifndef CYGONCE_HAL_OPENRISC_STUB_H