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 <sys/vnode.h>
  47 #include <sys/sysctl.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 int             bsd_mbuf_cluster_reserve(void);
  59
  60 /*
  61  * Declare these as initialized data so we can patch them.
  62  */
  63
  64 #ifdef  NBUF
  65 int             max_nbuf_headers = NBUF;
  66 int             niobuf = NBUF / 2;
  67 int             nbuf_hashelements = NBUF;
  68 int             nbuf = NBUF;
  69 #else
  70 int             max_nbuf_headers = 0;
  71 int             niobuf = 0;
  72 int             nbuf_hashelements = 0;
  73 int             nbuf = 0;
  74 #endif
  75
  76 SYSCTL_INT (_kern, OID_AUTO, nbuf, CTLFLAG_RD, &nbuf, 0, "");
  77 SYSCTL_INT (_kern, OID_AUTO, maxnbuf, CTLFLAG_RW, &max_nbuf_headers, 0, "");
  78
  79 __private_extern__ int customnbuf = 0;
  80 int             srv = 0;        /* Flag indicates a server boot when set */
  81 int             ncl = 0;
  82
  83 vm_map_t        buffer_map;
  84 vm_map_t        bufferhdr_map;
  85
  86
  87 extern void     bsd_startupearly(void);
  88
  89 void
  90 bsd_startupearly(void)
  91 {
  92         vm_offset_t     firstaddr;
  93         vm_size_t       size;
  94         kern_return_t   ret;
  95
  96         /* clip the number of buf headers upto 16k */
  97         if (max_nbuf_headers == 0)
  98                 max_nbuf_headers = atop(sane_size / 50);        /* Get 2% of ram, but no more than we can map */
  99         if ((customnbuf == 0) && (max_nbuf_headers > 16384))
 100                 max_nbuf_headers = 16384;
 101         if (max_nbuf_headers < 256)
 102                 max_nbuf_headers = 256;
 103
 104         /* clip the number of hash elements  to 200000 */
 105         if ( (customnbuf == 0 ) && nbuf_hashelements == 0) {
 106                 nbuf_hashelements = atop(sane_size / 50);
 107                 if (nbuf_hashelements > 200000)
 108                         nbuf_hashelements = 200000;
 109         } else
 110                 nbuf_hashelements = max_nbuf_headers;
 111
 112         if (niobuf == 0)
 113                 niobuf = max_nbuf_headers;
 114         if (niobuf > 4096)
 115                 niobuf = 4096;
 116         if (niobuf < 128)
 117                 niobuf = 128;
 118
 119         size = (max_nbuf_headers + niobuf) * sizeof(struct buf);
 120         size = round_page(size);
 121
 122         ret = kmem_suballoc(kernel_map,
 123                             &firstaddr,
 124                             size,
 125                             FALSE,
 126                             VM_FLAGS_ANYWHERE,
 127                             &bufferhdr_map);
 128
 129         if (ret != KERN_SUCCESS)
 130                 panic("Failed to create bufferhdr_map");
 131
 132         ret = kernel_memory_allocate(bufferhdr_map,
 133                                      &firstaddr,
 134                                      size,
 135                                      0,
 136                                      KMA_HERE | KMA_KOBJECT);
 137
 138         if (ret != KERN_SUCCESS)
 139                 panic("Failed to allocate bufferhdr_map");
 140
 141         buf = (struct buf *) firstaddr;
 142         bzero(buf, size);
 143
 144         {
 145                 int             scale;
 146
 147                 nmbclusters = bsd_mbuf_cluster_reserve() / MCLBYTES;
 148
 149                 if ((scale = nmbclusters / NMBCLUSTERS) > 1) {
 150                         tcp_sendspace *= scale;
 151                         tcp_recvspace *= scale;
 152
 153                         if (tcp_sendspace > (32 * 1024))
 154                                 tcp_sendspace = 32 * 1024;
 155                         if (tcp_recvspace > (32 * 1024))
 156                                 tcp_recvspace = 32 * 1024;
 157                 }
 158         }
 159
 160         /*
 161          * Size vnodes based on memory
 162          * Number vnodes  is (memsize/64k) + 1024
 163          * This is the calculation that is used by launchd in tiger
 164          * we are clipping the max based on 16G
 165          * ie ((16*1024*1024*1024)/(64 *1024)) + 1024 = 263168;
 166          */
 167         desiredvnodes  = (sane_size/65536) + 1024;
 168         if (desiredvnodes > 263168)
 169                 desiredvnodes = 263168;
 170 }
 171
 172 void
 173 bsd_bufferinit(void)
 174 {
 175         kern_return_t   ret;
 176
 177         cons.t_dev = makedev(12, 0);
 178
 179         bsd_startupearly();
 180
 181         ret = kmem_suballoc(kernel_map,
 182                             (vm_offset_t *) & mbutl,
 183                             (vm_size_t) (nmbclusters * MCLBYTES),
 184                             FALSE,
 185                             VM_FLAGS_ANYWHERE,
 186                             &mb_map);
 187
 188         if (ret != KERN_SUCCESS)
 189                 panic("Failed to allocate mb_map\n");
 190
 191         /*
 192          * Set up buffers, so they can be used to read disk labels.
 193          */
 194         bufinit();
 195 }
 196
 197 /*
 198  * this has been broken out into a separate routine that
 199  * can be called from the x86 early vm initialization to
 200  * determine how much lo memory to reserve on systems with
 201  * DMA hardware that can't fully address all of the physical
 202  * memory that is present.
 203  */
 204 int
 205 bsd_mbuf_cluster_reserve(void)
 206 {
 207         if (sane_size > (64 * 1024 * 1024) || ncl) {
 208
 209                 if ((nmbclusters = ncl) == 0) {
 210                         if ((nmbclusters = ((sane_size / 16)/MCLBYTES)) > 32768)
 211                                 nmbclusters = 32768;
 212                 }
 213         }
 214
 215         return (nmbclusters * MCLBYTES);
 216 }