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/cpu.h>
  39 #include <machine/sysarch.h>
  40
  41 #ifndef _SYS_SYSPROTO_H_
  42 struct sysarch_args {
  43         int op;
  44         char *parms;
  45 };
  46 #endif
  47
  48 int
  49 sysarch(struct thread *td, struct sysarch_args *uap)
  50 {
  51         struct ia64_iodesc iod;
  52         int error;
  53
  54         error = 0;
  55         switch(uap->op) {
  56         case IA64_IORD:
  57                 copyin(uap->parms, &iod, sizeof(iod));
  58                 switch (iod.width) {
  59                 case 1:
  60                         iod.val = inb(iod.port);
  61                         break;
  62                 case 2:
  63                         if (iod.port & 1) {
  64                                 iod.val = inb(iod.port);
  65                                 iod.val |= inb(iod.port + 1) << 8;
  66                         } else
  67                                 iod.val = inw(iod.port);
  68                         break;
  69                 case 4:
  70                         if (iod.port & 3) {
  71                                 if (iod.port & 1) {
  72                                         iod.val = inb(iod.port);
  73                                         iod.val |= inw(iod.port + 1) << 8;
  74                                         iod.val |= inb(iod.port + 3) << 24;
  75                                 } else {
  76                                         iod.val = inw(iod.port);
  77                                         iod.val |= inw(iod.port + 2) << 16;
  78                                 }
  79                         } else
  80                                 iod.val = inl(iod.port);
  81                         break;
  82                 default:
  83                         error = EINVAL;
  84                 }
  85                 copyout(&iod, uap->parms, sizeof(iod));
  86                 break;
  87         case IA64_IOWR:
  88                 copyin(uap->parms, &iod, sizeof(iod));
  89                 switch (iod.width) {
  90                 case 1:
  91                         outb(iod.port, iod.val);
  92                         break;
  93                 case 2:
  94                         if (iod.port & 1) {
  95                                 outb(iod.port, iod.val);
  96                                 outb(iod.port + 1, iod.val >> 8);
  97                         } else
  98                                 outw(iod.port, iod.val);
  99                         break;
 100                 case 4:
 101                         if (iod.port & 3) {
 102                                 if (iod.port & 1) {
 103                                         outb(iod.port, iod.val);
 104                                         outw(iod.port + 1, iod.val >> 8);
 105                                         outb(iod.port + 3, iod.val >> 24);
 106                                 } else {
 107                                         outw(iod.port, iod.val);
 108                                         outw(iod.port + 2, iod.val >> 16);
 109                                 }
 110                         } else
 111                                 outl(iod.port, iod.val);
 112                         break;
 113                 default:
 114                         error = EINVAL;
 115                 }
 116                 break;
 117         default:
 118                 error = EINVAL;
 119                 break;
 120         }
 121         return (error);
 122 }