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/* fault.h                             */

/* Last change :  2.11.94              */

/*-------------------------------------*/

/*

 *  $Id: fault.h,v 1.2 2001-09-27 11:59:59 chris Exp $

 */

#ifndef _FAULT_H_

#define _FAULT_H_

  /* (RAM-based) Fault Handler.

   * Is invoked when there is no chance to repair current state.

   */

extern void faultBad(int invokedFromRom,

                     unsigned int inst, unsigned int * faultBuffer,

                     unsigned int type, unsigned int sbtp);

  /* (RAM-based) Fault Handler.

   * Is invoked when there is a chance to repair current state.

   */

extern void faultGood(unsigned int instr, unsigned int * faultBuffer,

                      unsigned int type, unsigned int sbtp);

  /* Some addresses that are defined in rom.ld.

   */

extern unsigned int faultCheckSum;

extern unsigned int faultBuffer[];

extern unsigned int faultStart[];

extern unsigned int faultEnd[];

  /* Interface for user to register fault handlers of his own.

   * Fault names.

   */

#define ParallelFLT     0

#define TraceFLT        1

#define OperationFLT    2

#define ArithmeticFLT   3

#define ConstraintFLT   5

#define ProtectionFLT   7

#define TypeFLT         9  

  /* User-registered fault handler.

   */

typedef void (* UserFaultHandler)(unsigned int inst, unsigned int * faultBuf,

                                  unsigned int type, unsigned int sbtp);

  /* Register user-defined fault handler. The third argument is

   * how many times this fault handler will be valid. This to avoid

   * the situation when handler is bad and it causes a fault itself.

   */

extern int faultRegister(int fault, UserFaultHandler, int cnt);

  /* Validate handler for one more time.

   */

extern int faultOk(int fault);

#endif

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