Home | History | Annotate | Line # | Download | only in boot
io.c revision 1.1 
      1 /*	$Id: io.c,v 1.1 1998/01/16 04:17:50 sakamoto Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 1995-1997 Gary Thomas (gdt (at) linuxppc.org)
      5  * All rights reserved.
      6  *
      7  * PCI/ISA I/O support
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *      This product includes software developed by Gary Thomas.
     20  * 4. The name of the author may not be used to endorse or promote products
     21  *    derived from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  */
     34 
     35 volatile unsigned char *ISA_io  = (unsigned char *)0x80000000;
     36 volatile unsigned char *ISA_mem = (unsigned char *)0xC0000000;
     37 
     38 void
     39 outb(int port, char val)
     40 {
     41 	ISA_io[port] = val;
     42 }
     43 
     44 unsigned char
     45 inb(int port)
     46 {
     47 	return (ISA_io[port]);
     48 }
     49 
     50 unsigned long
     51 local_to_PCI(unsigned long addr)
     52 {
     53 	return ((addr & 0x7FFFFFFF) | 0x80000000);
     54 }
     55