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root/bsp/drv/ppc/include/busio.h

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   1 /*
   2  * Copyright (c) 2009, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 /*
  31  * busio.h - BUS i/o operations
  32  */
  34 #ifndef _ARM_BUSIO_H
  35 #define _ARM_BUSIO_H
  37 #include <sys/cdefs.h>
  38 #include <sys/types.h>
  40 /* temp!! */
  41 #define IOBASE  0x80000000
  43 #define bus_read_8(addr)        (*((volatile uint8_t *)(IOBASE+addr)))
  44 #define bus_read_16(addr)       (*((volatile uint16_t *)(IOBASE+addr)))
  45 #define bus_read_32(addr)       (*((volatile uint32_t *)(IOBASE+addr)))
  47 #define bus_write_8(addr, val)  (*((volatile uint8_t *)(IOBASE+addr)) = (val))
  48 #define bus_write_16(addr, val) (*((volatile uint16_t *)(IOBASE+addr)) = (val))
  49 #define bus_write_32(addr, val) (*((volatile uint32_t *)(IOBASE+addr)) = (val))
  51 #endif /* !_ARM_BUSIO_H */