bsd/dev/unix_startup.c

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1992,7 NeXT Computer, Inc.
  30  *
  31  * Unix data structure initialization.
  32  *
  33  */
  34
  35 #include <mach/mach_types.h>
  36
  37 #include <vm/vm_kern.h>
  38 #include <mach/vm_prot.h>
  39
  40 #include <sys/param.h>
  41 #include <sys/buf_internal.h>
  42 #include <sys/clist.h>
  43 #include <sys/mbuf.h>
  44 #include <sys/systm.h>
  45 #include <sys/tty.h>
  46 #include <dev/ppc/cons.h>
  47
  48 extern vm_map_t mb_map;
  49
  50 extern u_long   tcp_sendspace;
  51 extern u_long   tcp_recvspace;
  52
  53 void            bsd_bufferinit(void);
  54 extern void     md_prepare_for_shutdown(int, int, char *);
  55
  56 /*
  57  * Declare these as initialized data so we can patch them.
  58  */
  59
  60 #ifdef  NBUF
  61 int             nbuf = NBUF;
  62 int             niobuf = NBUF / 2;
  63
  64 #else
  65 int             nbuf = 0;
  66 int             niobuf = 0;
  67
  68 #endif
  69
  70 int             srv = 0;        /* Flag indicates a server boot when set */
  71 int             ncl = 0;
  72
  73 vm_map_t        buffer_map;
  74 vm_map_t        bufferhdr_map;
  75
  76
  77 extern void     bsd_startupearly(void);
  78
  79 void
  80 bsd_startupearly(void)
  81 {
  82         vm_offset_t     firstaddr;
  83         vm_size_t       size;
  84         kern_return_t   ret;
  85
  86         if (nbuf == 0)
  87                 nbuf = atop(sane_size / 100);   /* Get 1% of ram, but no more than we can map */
  88         if (nbuf > 8192)
  89                 nbuf = 8192;
  90         if (nbuf < 256)
  91                 nbuf = 256;
  92
  93         if (niobuf == 0)
  94                 niobuf = nbuf;
  95         if (niobuf > 4096)
  96                 niobuf = 4096;
  97         if (niobuf < 128)
  98                 niobuf = 128;
  99
 100         size = (nbuf + niobuf) * sizeof(struct buf);
 101         size = round_page(size);
 102
 103         ret = kmem_suballoc(kernel_map,
 104                             &firstaddr,
 105                             size,
 106                             FALSE,
 107                             VM_FLAGS_ANYWHERE,
 108                             &bufferhdr_map);
 109
 110         if (ret != KERN_SUCCESS)
 111                 panic("Failed to create bufferhdr_map");
 112
 113         ret = kernel_memory_allocate(bufferhdr_map,
 114                                      &firstaddr,
 115                                      size,
 116                                      0,
 117                                      KMA_HERE | KMA_KOBJECT);
 118
 119         if (ret != KERN_SUCCESS)
 120                 panic("Failed to allocate bufferhdr_map");
 121
 122         buf = (struct buf *) firstaddr;
 123         bzero(buf, size);
 124
 125         if (sane_size > (64 * 1024 * 1024) || ncl) {
 126                 int             scale;
 127
 128                 if ((nmbclusters = ncl) == 0) {
 129                         if ((nmbclusters = ((sane_size / 16)/MCLBYTES)) > 32768)
 130                                 nmbclusters = 32768;
 131                 }
 132                 if ((scale = nmbclusters / NMBCLUSTERS) > 1) {
 133                         tcp_sendspace *= scale;
 134                         tcp_recvspace *= scale;
 135
 136                         if (tcp_sendspace > (32 * 1024))
 137                                 tcp_sendspace = 32 * 1024;
 138                         if (tcp_recvspace > (32 * 1024))
 139                                 tcp_recvspace = 32 * 1024;
 140                 }
 141         }
 142 }
 143
 144 void
 145 bsd_bufferinit(void)
 146 {
 147         kern_return_t   ret;
 148
 149         cons.t_dev = makedev(12, 0);
 150
 151         bsd_startupearly();
 152
 153         ret = kmem_suballoc(kernel_map,
 154                             (vm_offset_t *) & mbutl,
 155                             (vm_size_t) (nmbclusters * MCLBYTES),
 156                             FALSE,
 157                             VM_FLAGS_ANYWHERE,
 158                             &mb_map);
 159
 160         if (ret != KERN_SUCCESS)
 161                 panic("Failed to allocate mb_map\n");
 162
 163         /*
 164          * Set up buffers, so they can be used to read disk labels.
 165          */
 166         bufinit();
 167 }