bsd/dev/unix_startup.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Copyright (c) 1992,7 NeXT Computer, Inc.
  32  *
  33  * Unix data structure initialization.
  34  *
  35  */
  36
  37 #include <mach/mach_types.h>
  38
  39 #include <vm/vm_kern.h>
  40 #include <mach/vm_prot.h>
  41
  42 #include <sys/param.h>
  43 #include <sys/buf_internal.h>
  44 #include <sys/clist.h>
  45 #include <sys/mbuf.h>
  46 #include <sys/systm.h>
  47 #include <sys/tty.h>
  48 #include <dev/ppc/cons.h>
  49
  50 extern vm_map_t mb_map;
  51
  52 extern u_long   tcp_sendspace;
  53 extern u_long   tcp_recvspace;
  54
  55 void            bsd_bufferinit(void);
  56 extern void     md_prepare_for_shutdown(int, int, char *);
  57
  58 /*
  59  * Declare these as initialized data so we can patch them.
  60  */
  61
  62 #ifdef  NBUF
  63 int             nbuf = NBUF;
  64 int             niobuf = NBUF / 2;
  65
  66 #else
  67 int             nbuf = 0;
  68 int             niobuf = 0;
  69
  70 #endif
  71
  72 int             srv = 0;        /* Flag indicates a server boot when set */
  73 int             ncl = 0;
  74
  75 vm_map_t        buffer_map;
  76 vm_map_t        bufferhdr_map;
  77
  78
  79 extern void     bsd_startupearly(void);
  80
  81 void
  82 bsd_startupearly(void)
  83 {
  84         vm_offset_t     firstaddr;
  85         vm_size_t       size;
  86         kern_return_t   ret;
  87
  88         if (nbuf == 0)
  89                 nbuf = atop(sane_size / 100);   /* Get 1% of ram, but no more than we can map */
  90         if (nbuf > 8192)
  91                 nbuf = 8192;
  92         if (nbuf < 256)
  93                 nbuf = 256;
  94
  95         if (niobuf == 0)
  96                 niobuf = nbuf;
  97         if (niobuf > 4096)
  98                 niobuf = 4096;
  99         if (niobuf < 128)
 100                 niobuf = 128;
 101
 102         size = (nbuf + niobuf) * sizeof(struct buf);
 103         size = round_page(size);
 104
 105         ret = kmem_suballoc(kernel_map,
 106                             &firstaddr,
 107                             size,
 108                             FALSE,
 109                             VM_FLAGS_ANYWHERE,
 110                             &bufferhdr_map);
 111
 112         if (ret != KERN_SUCCESS)
 113                 panic("Failed to create bufferhdr_map");
 114
 115         ret = kernel_memory_allocate(bufferhdr_map,
 116                                      &firstaddr,
 117                                      size,
 118                                      0,
 119                                      KMA_HERE | KMA_KOBJECT);
 120
 121         if (ret != KERN_SUCCESS)
 122                 panic("Failed to allocate bufferhdr_map");
 123
 124         buf = (struct buf *) firstaddr;
 125         bzero(buf, size);
 126
 127         if (sane_size > (64 * 1024 * 1024) || ncl) {
 128                 int             scale;
 129
 130                 if ((nmbclusters = ncl) == 0) {
 131                         if ((nmbclusters = ((sane_size / 16)/MCLBYTES)) > 32768)
 132                                 nmbclusters = 32768;
 133                 }
 134                 if ((scale = nmbclusters / NMBCLUSTERS) > 1) {
 135                         tcp_sendspace *= scale;
 136                         tcp_recvspace *= scale;
 137
 138                         if (tcp_sendspace > (32 * 1024))
 139                                 tcp_sendspace = 32 * 1024;
 140                         if (tcp_recvspace > (32 * 1024))
 141                                 tcp_recvspace = 32 * 1024;
 142                 }
 143         }
 144 }
 145
 146 void
 147 bsd_bufferinit(void)
 148 {
 149         kern_return_t   ret;
 150
 151         cons.t_dev = makedev(12, 0);
 152
 153         bsd_startupearly();
 154
 155         ret = kmem_suballoc(kernel_map,
 156                             (vm_offset_t *) & mbutl,
 157                             (vm_size_t) (nmbclusters * MCLBYTES),
 158                             FALSE,
 159                             VM_FLAGS_ANYWHERE,
 160                             &mb_map);
 161
 162         if (ret != KERN_SUCCESS)
 163                 panic("Failed to allocate mb_map\n");
 164
 165         /*
 166          * Set up buffers, so they can be used to read disk labels.
 167          */
 168         bufinit();
 169 }