source: rtems/cpukit/libcsupport/include/motorola/mc68230.h @ 7945944

/**
 * @file rtems/motorola/mc68230.h
 */

/*
 * mc68230.h -- Low level support code for the Motorola 68230 Parallel
 *              Interface/Timer (PIT)
 *
 * Modified by Doug McBride, Colorado Space Grant College
 *
 * Format taken partly from RTEMS code and mostly from Motorola IDP user's
 * manual.  RTEMS copyright information below.
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 *
 *  $Id$
 */

#ifndef _RTEMS_MOTOROLA_MC68230_H
#define _RTEMS_MOTOROLA_MC68230_H

/* Some Motorola IDP User manual defines: */
#define PIT_ADDR        0x00c01003              /* base address of the PIT */
#define REGOFF  0x04                            /* Difference between addresses */
#define VECT    64
#define H1VECT  0x00
#define H2VECT  0x01
#define H3VECT  0x02
#define H4VECT  0x03

/*
 * mc68230 register offsets
 */
#define PGCR    0x00
#define PSRR    1*REGOFF
#define PADDR   2*REGOFF
#define PBDDR   3*REGOFF
#define PCDDR   4*REGOFF
#define PIVR    5*REGOFF
#define PACR    6*REGOFF
#define PBCR    7*REGOFF
#define PADR    8*REGOFF
#define PBDR    9*REGOFF
#define PAAR    10*REGOFF
#define PBAR    11*REGOFF
#define PCDR    12*REGOFF
#define PITSR   13*REGOFF
#define TCR             16*REGOFF
#define TIVR    17*REGOFF
#define CPRH    19*REGOFF
#define CPRM    20*REGOFF
#define CPRL    21*REGOFF
#define CNTRH   23*REGOFF
#define CNTRM   24*REGOFF
#define CNTRL   25*REGOFF
#define TSR             26*REGOFF

/* Some RTEMS style defines: */
#ifndef VOL8
#define VOL8( ptr )   ((volatile uint8_t   *)(ptr))
#endif

#define MC68230_WRITE( reg, data ) \
   *(VOL8(PIT_ADDR+reg)) = (data)

#define MC68230_READ( reg, data ) \
   (data) = *(VOL8(PIT_ADDR+reg))

#endif