raw_exception.h

/*
 * raw_execption.h
 *
 *      This file contains implementation of C function to
 *          Instantiate mpc5xx primary exception entries.
 *      More detailled information can be found on the Motorola
 *      site and more precisely in the following book:
 *
 *      MPC555/MPC556 User's Manual
 *      Motorola REF : MPC555UM/D Rev. 3, 2000 October 15
 *
 *
 *  MPC5xx port sponsored by Defence Research and Development Canada - Suffield
 *  Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
 *
 *  Derived from libcpu/powerpc/mpc8xx/exceptions/raw_exception.h:
 *
 *  Copyright (C) 1999  Eric Valette (valette@crf.canon.fr)
 *                     Canon Centre Recherche France.
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.org/license/LICENSE.
 */
 
#ifndef _LIBCPU_RAW_EXCEPTION_H
#define _LIBCPU_RAW_EXCEPTION_H
 
#include <libcpu/vectors.h>
 
/*
 * Exception Vectors as defined in the MPC555 User's Manual
 */
 
#define ASM_RESET_VECTOR    0x01
#define ASM_MACH_VECTOR     0x02
 
#define ASM_EXT_VECTOR      0x05
#define ASM_ALIGN_VECTOR    0x06
#define ASM_PROG_VECTOR     0x07
#define ASM_FLOAT_VECTOR    0x08
#define ASM_DEC_VECTOR      0x09
 
#define ASM_SYS_VECTOR      0x0C
#define ASM_TRACE_VECTOR    0x0D
#define ASM_FLOATASSIST_VECTOR  0x0E
 
#define ASM_SOFTEMUL_VECTOR 0x10
 
#define ASM_IPROT_VECTOR    0x13
#define ASM_DPROT_VECTOR    0x14
 
#define ASM_DBREAK_VECTOR   0x1C
#define ASM_IBREAK_VECTOR   0x1D
#define ASM_MEBREAK_VECTOR  0x1E
#define ASM_NMEBREAK_VECTOR 0x1F
 
#ifndef ASM
 
/*
 * Type definition for raw exceptions.
 */
 
typedef unsigned char  rtems_vector;
struct  __rtems_raw_except_connect_data__;
typedef unsigned char   rtems_raw_except_hdl_size;
 
typedef struct {
  rtems_vector          vector;
  rtems_exception_handler_t*    raw_hdl;
}rtems_raw_except_hdl;
 
typedef void (*rtems_raw_except_enable)     (const struct __rtems_raw_except_connect_data__*);
typedef void (*rtems_raw_except_disable)    (const struct __rtems_raw_except_connect_data__*);
typedef int  (*rtems_raw_except_is_enabled) (const struct __rtems_raw_except_connect_data__*);
 
typedef struct __rtems_raw_except_connect_data__{
 /*
  * Exception vector (As defined in the manual)
  */
  rtems_vector          exceptIndex;
  /*
   * Exception raw handler. See comment on handler properties below in function prototype.
   */
  rtems_raw_except_hdl      hdl;
  /*
   * function for enabling raw exceptions. In order to be consistent
   * with the fact that the raw connexion can defined in the
   * libcpu library, this library should have no knowledge of
   * board specific hardware to manage exceptions and thus the
   * "on" routine must enable the except at processor level only.
   *
   */
    rtems_raw_except_enable on;
  /*
   * function for disabling raw exceptions. In order to be consistent
   * with the fact that the raw connexion can defined in the
   * libcpu library, this library should have no knowledge of
   * board specific hardware to manage exceptions and thus the
   * "on" routine must disable the except both at device and PIC level.
   *
   */
  rtems_raw_except_disable  off;
  /*
   * function enabling to know what exception may currently occur
   */
  rtems_raw_except_is_enabled   isOn;
}rtems_raw_except_connect_data;
 
typedef struct {
  /*
   * size of all the table fields (*Tbl) described below.
   */
  unsigned int              exceptSize;
  /*
   * Default handler used when disconnecting exceptions.
   */
  rtems_raw_except_connect_data     defaultRawEntry;
  /*
   * Table containing initials/current value.
   */
  rtems_raw_except_connect_data*    rawExceptHdlTbl;
}rtems_raw_except_global_settings;
 
/*
 * C callable function enabling to set up one raw idt entry
 */
extern int mpc5xx_set_exception (const rtems_raw_except_connect_data*);
 
/*
 * C callable function enabling to get one current raw idt entry
 */
extern int mpc5xx_get_current_exception (rtems_raw_except_connect_data*);
 
/*
 * C callable function enabling to remove one current raw idt entry
 */
extern int mpc5xx_delete_exception (const rtems_raw_except_connect_data*);
 
/*
 * C callable function enabling to check if vector is valid
 */
extern int mpc5xx_vector_is_valid(rtems_vector vector);
 
inline static  void* mpc5xx_get_vector_addr(rtems_vector vector)
{
  return ((void*)  (((unsigned) vector) << 8));
}
/*
 * Exception global init.
 */
extern int mpc5xx_init_exceptions (rtems_raw_except_global_settings* config);
extern int mpc5xx_get_exception_config (rtems_raw_except_global_settings** config);
 
# endif /* ASM */
 
#define SIZEOF_
 
#endif