bsd/dev/unix_startup.c

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1992,7 NeXT Computer, Inc.
  24  *
  25  * Unix data structure initialization.
  26  *
  27  */
  28
  29 #include <mach/mach_types.h>
  30
  31 #include <vm/vm_kern.h>
  32 #include <mach/vm_prot.h>
  33
  34 #include <sys/param.h>
  35 #include <sys/buf_internal.h>
  36 #include <sys/clist.h>
  37 #include <sys/mbuf.h>
  38 #include <sys/systm.h>
  39 #include <sys/tty.h>
  40 #include <dev/ppc/cons.h>
  41
  42 extern vm_map_t mb_map;
  43
  44 extern u_long   tcp_sendspace;
  45 extern u_long   tcp_recvspace;
  46
  47 void            bsd_bufferinit(void);
  48 extern void     md_prepare_for_shutdown(int, int, char *);
  49
  50 /*
  51  * Declare these as initialized data so we can patch them.
  52  */
  53
  54 #ifdef  NBUF
  55 int             nbuf = NBUF;
  56 int             niobuf = NBUF / 2;
  57
  58 #else
  59 int             nbuf = 0;
  60 int             niobuf = 0;
  61
  62 #endif
  63
  64 int             srv = 0;        /* Flag indicates a server boot when set */
  65 int             ncl = 0;
  66
  67 vm_map_t        buffer_map;
  68 vm_map_t        bufferhdr_map;
  69
  70
  71 extern void     bsd_startupearly(void);
  72
  73 void
  74 bsd_startupearly(void)
  75 {
  76         vm_offset_t     firstaddr;
  77         vm_size_t       size;
  78         kern_return_t   ret;
  79
  80         if (nbuf == 0)
  81                 nbuf = atop(sane_size / 100);   /* Get 1% of ram, but no more than we can map */
  82         if (nbuf > 8192)
  83                 nbuf = 8192;
  84         if (nbuf < 256)
  85                 nbuf = 256;
  86
  87         if (niobuf == 0)
  88                 niobuf = nbuf;
  89         if (niobuf > 4096)
  90                 niobuf = 4096;
  91         if (niobuf < 128)
  92                 niobuf = 128;
  93
  94         size = (nbuf + niobuf) * sizeof(struct buf);
  95         size = round_page(size);
  96
  97         ret = kmem_suballoc(kernel_map,
  98                             &firstaddr,
  99                             size,
 100                             FALSE,
 101                             VM_FLAGS_ANYWHERE,
 102                             &bufferhdr_map);
 103
 104         if (ret != KERN_SUCCESS)
 105                 panic("Failed to create bufferhdr_map");
 106
 107         ret = kernel_memory_allocate(bufferhdr_map,
 108                                      &firstaddr,
 109                                      size,
 110                                      0,
 111                                      KMA_HERE | KMA_KOBJECT);
 112
 113         if (ret != KERN_SUCCESS)
 114                 panic("Failed to allocate bufferhdr_map");
 115
 116         buf = (struct buf *) firstaddr;
 117         bzero(buf, size);
 118
 119         if (sane_size > (64 * 1024 * 1024) || ncl) {
 120                 int             scale;
 121
 122                 if ((nmbclusters = ncl) == 0) {
 123                         if ((nmbclusters = ((sane_size / 16)/MCLBYTES)) > 32768)
 124                                 nmbclusters = 32768;
 125                 }
 126                 if ((scale = nmbclusters / NMBCLUSTERS) > 1) {
 127                         tcp_sendspace *= scale;
 128                         tcp_recvspace *= scale;
 129
 130                         if (tcp_sendspace > (32 * 1024))
 131                                 tcp_sendspace = 32 * 1024;
 132                         if (tcp_recvspace > (32 * 1024))
 133                                 tcp_recvspace = 32 * 1024;
 134                 }
 135         }
 136 }
 137
 138 void
 139 bsd_bufferinit(void)
 140 {
 141         kern_return_t   ret;
 142
 143         cons.t_dev = makedev(12, 0);
 144
 145         bsd_startupearly();
 146
 147         ret = kmem_suballoc(kernel_map,
 148                             (vm_offset_t *) & mbutl,
 149                             (vm_size_t) (nmbclusters * MCLBYTES),
 150                             FALSE,
 151                             VM_FLAGS_ANYWHERE,
 152                             &mb_map);
 153
 154         if (ret != KERN_SUCCESS)
 155                 panic("Failed to allocate mb_map\n");
 156
 157         /*
 158          * Set up buffers, so they can be used to read disk labels.
 159          */
 160         bufinit();
 161 }