sys/ia64/ia64/sys_machdep.c

   1 /*-
   2  * Copyright (c) 1990 The Regents of the University of California.
   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 University nor the names of its 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 REGENTS 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 REGENTS 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  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/sysproto.h>
  36 #include <sys/sysent.h>
  37
  38 #include <machine/bus.h>
  39 #include <machine/cpu.h>
  40 #include <machine/sysarch.h>
  41
  42 #ifndef _SYS_SYSPROTO_H_
  43 struct sysarch_args {
  44         int op;
  45         char *parms;
  46 };
  47 #endif
  48
  49 int
  50 sysarch(struct thread *td, struct sysarch_args *uap)
  51 {
  52         struct ia64_iodesc iod;
  53         int error;
  54
  55         error = 0;
  56         switch(uap->op) {
  57         case IA64_IORD:
  58                 copyin(uap->parms, &iod, sizeof(iod));
  59                 switch (iod.width) {
  60                 case 1:
  61                         iod.val = inb(iod.port);
  62                         break;
  63                 case 2:
  64                         if (iod.port & 1) {
  65                                 iod.val = inb(iod.port);
  66                                 iod.val |= inb(iod.port + 1) << 8;
  67                         } else
  68                                 iod.val = inw(iod.port);
  69                         break;
  70                 case 4:
  71                         if (iod.port & 3) {
  72                                 if (iod.port & 1) {
  73                                         iod.val = inb(iod.port);
  74                                         iod.val |= inw(iod.port + 1) << 8;
  75                                         iod.val |= inb(iod.port + 3) << 24;
  76                                 } else {
  77                                         iod.val = inw(iod.port);
  78                                         iod.val |= inw(iod.port + 2) << 16;
  79                                 }
  80                         } else
  81                                 iod.val = inl(iod.port);
  82                         break;
  83                 default:
  84                         error = EINVAL;
  85                 }
  86                 copyout(&iod, uap->parms, sizeof(iod));
  87                 break;
  88         case IA64_IOWR:
  89                 copyin(uap->parms, &iod, sizeof(iod));
  90                 switch (iod.width) {
  91                 case 1:
  92                         outb(iod.port, iod.val);
  93                         break;
  94                 case 2:
  95                         if (iod.port & 1) {
  96                                 outb(iod.port, iod.val);
  97                                 outb(iod.port + 1, iod.val >> 8);
  98                         } else
  99                                 outw(iod.port, iod.val);
 100                         break;
 101                 case 4:
 102                         if (iod.port & 3) {
 103                                 if (iod.port & 1) {
 104                                         outb(iod.port, iod.val);
 105                                         outw(iod.port + 1, iod.val >> 8);
 106                                         outb(iod.port + 3, iod.val >> 24);
 107                                 } else {
 108                                         outw(iod.port, iod.val);
 109                                         outw(iod.port + 2, iod.val >> 16);
 110                                 }
 111                         } else
 112                                 outl(iod.port, iod.val);
 113                         break;
 114                 default:
 115                         error = EINVAL;
 116                 }
 117                 break;
 118         default:
 119                 error = EINVAL;
 120                 break;
 121         }
 122         return (error);
 123 }