sys/compat/irix/irix_kmem.c

   1 /*      $NetBSD: irix_kmem.c,v 1.9 2009/03/14 21:04:18 dsl Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Emmanuel Dreyfus.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: irix_kmem.c,v 1.9 2009/03/14 21:04:18 dsl Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/proc.h>
  38 #include <sys/errno.h>
  39 #include <sys/ioctl.h>
  40 #include <sys/device.h>
  41 #include <sys/vnode.h>
  42 #include <sys/conf.h>
  43
  44 #include <compat/irix/irix_kmem.h>
  45 #include <compat/irix/irix_sysmp.h>
  46
  47 /*
  48  * We have no idea of theses value's meaning yet, but time will come
  49  */
  50 long irix_kernel_var[32] = { 0x7fff2fc8, 0x0fb72194, 0x00000000, 0x0fb68890,
  51                              0x7fff2f74, 0x7fff2fc8, 0x7fff2fc8, 0x7fff2f74,
  52                              0x7fff2f7c, 0x0fb7246c, 0x0fbd9178, 0x0fb910d4,
  53                              0x0fb65440, 0x00000800, 0x00400034, 0x0000000a,
  54                              0x00000008, 0x0fb73fb0, 0x00000000, 0x00000000,
  55                              0x00000000, 0x7fff3000, 0x00000001, 0x7fff2f74,
  56                              0x7fff2d24, 0x0fa85880, 0x00000001, 0x0fb60188,
  57                              0x00000004, 0x00000000, 0x00000000, 0x00000001,
  58                            };
  59 struct irix_kmem_softc {
  60         struct device irix_kmem_dev;
  61 };
  62
  63 dev_type_open(irix_kmemopen);
  64 dev_type_close(irix_kmemclose);
  65 dev_type_read(irix_kmemread);
  66 dev_type_write(irix_kmemwrite);
  67
  68 const struct cdevsw irix_kmem_cdevsw = {
  69         irix_kmemopen, irix_kmemclose, irix_kmemread, irix_kmemwrite,
  70         noioctl, nostop, notty, nopoll, nommap, nokqfilter,
  71 };
  72
  73 void
  74 irix_kmemattach(struct device *parent, struct device *self, void *aux)
  75 {
  76         return;
  77 }
  78
  79 int
  80 irix_kmemopen(dev_t dev, int flags, int fmt, struct lwp *l)
  81 {
  82         return 0;
  83 }
  84
  85 int
  86 irix_kmemread(dev_t dev, struct uio *uio, int flag)
  87 {
  88         void *buf = NULL;
  89         off_t buflen = 0;
  90         void *offset;
  91         int error = 0;
  92
  93 #ifdef DEBUG_IRIX
  94         printf("irix_kmemread(): offset = 0x%08lx\n", (long)uio->uio_offset);
  95         printf("irix_kmemread(): addr = %p\n", uio->uio_iov->iov_base);
  96         printf("irix_kmemread(): len = 0x%08lx\n", (long)uio->uio_iov->iov_len);
  97 #endif
  98         offset = (void *)(uintptr_t)uio->uio_offset; /* XXX */
  99         if (offset == &averunnable) { /* load average */
 100                 struct irix_loadavg iav;
 101                 int scale = averunnable.fscale / IRIX_LOADAVG_SCALE;
 102
 103                 (void)memset(&iav, 0, sizeof(iav));
 104                 iav.ldavg[0] = averunnable.ldavg[0] / scale;
 105                 iav.ldavg[1] = averunnable.ldavg[1] / scale;
 106                 iav.ldavg[2] = averunnable.ldavg[2] / scale;
 107                 buf = (void *)&iav;
 108                 buflen = sizeof(iav);
 109         }
 110
 111         if (offset == &irix_kernel_var) { /* kernel variables */
 112                 buf = &irix_kernel_var;
 113                 buflen = sizeof(irix_kernel_var);
 114         }
 115
 116         if (buflen != 0)
 117                 error = uiomove(buf, buflen, uio);
 118         return error;
 119 }
 120
 121 int
 122 irix_kmemwrite(dev_t dev, struct uio *uio, int flag)
 123 {
 124         return 0;
 125 }
 126
 127 int
 128 irix_kmemclose(dev_t dev, int flags, int fmt, struct lwp *l)
 129 {
 130         return 0;
 131 }
 132