bsd/dev/unix_startup.c

   1 /*
   2  * Copyright (c) 2000-2004 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 <sys/vnode.h>
  49 #include <sys/sysctl.h>
  50 #include <dev/ppc/cons.h>
  51
  52 extern vm_map_t mb_map;
  53
  54 extern u_long   tcp_sendspace;
  55 extern u_long   tcp_recvspace;
  56
  57 void            bsd_bufferinit(void);
  58 extern void     md_prepare_for_shutdown(int, int, char *);
  59
  60 int             bsd_mbuf_cluster_reserve(void);
  61
  62 /*
  63  * Declare these as initialized data so we can patch them.
  64  */
  65
  66 #ifdef  NBUF
  67 int             max_nbuf_headers = NBUF;
  68 int             niobuf = NBUF / 2;
  69 int             nbuf_hashelements = NBUF;
  70 int             nbuf = NBUF;
  71 #else
  72 int             max_nbuf_headers = 0;
  73 int             niobuf = 0;
  74 int             nbuf_hashelements = 0;
  75 int             nbuf = 0;
  76 #endif
  77
  78 SYSCTL_INT (_kern, OID_AUTO, nbuf, CTLFLAG_RD, &nbuf, 0, "");
  79 SYSCTL_INT (_kern, OID_AUTO, maxnbuf, CTLFLAG_RW, &max_nbuf_headers, 0, "");
  80
  81 __private_extern__ int customnbuf = 0;
  82 int             srv = 0;        /* Flag indicates a server boot when set */
  83 int             ncl = 0;
  84
  85 vm_map_t        buffer_map;
  86 vm_map_t        bufferhdr_map;
  87
  88
  89 extern void     bsd_startupearly(void);
  90
  91 void
  92 bsd_startupearly(void)
  93 {
  94         vm_offset_t     firstaddr;
  95         vm_size_t       size;
  96         kern_return_t   ret;
  97
  98         /* clip the number of buf headers upto 16k */
  99         if (max_nbuf_headers == 0)
 100                 max_nbuf_headers = atop(sane_size / 50);        /* Get 2% of ram, but no more than we can map */
 101         if ((customnbuf == 0) && (max_nbuf_headers > 16384))
 102                 max_nbuf_headers = 16384;
 103         if (max_nbuf_headers < 256)
 104                 max_nbuf_headers = 256;
 105
 106         /* clip the number of hash elements  to 200000 */
 107         if ( (customnbuf == 0 ) && nbuf_hashelements == 0) {
 108                 nbuf_hashelements = atop(sane_size / 50);
 109                 if (nbuf_hashelements > 200000)
 110                         nbuf_hashelements = 200000;
 111         } else
 112                 nbuf_hashelements = max_nbuf_headers;
 113
 114         if (niobuf == 0)
 115                 niobuf = max_nbuf_headers;
 116         if (niobuf > 4096)
 117                 niobuf = 4096;
 118         if (niobuf < 128)
 119                 niobuf = 128;
 120
 121         size = (max_nbuf_headers + niobuf) * sizeof(struct buf);
 122         size = round_page(size);
 123
 124         ret = kmem_suballoc(kernel_map,
 125                             &firstaddr,
 126                             size,
 127                             FALSE,
 128                             VM_FLAGS_ANYWHERE,
 129                             &bufferhdr_map);
 130
 131         if (ret != KERN_SUCCESS)
 132                 panic("Failed to create bufferhdr_map");
 133
 134         ret = kernel_memory_allocate(bufferhdr_map,
 135                                      &firstaddr,
 136                                      size,
 137                                      0,
 138                                      KMA_HERE | KMA_KOBJECT);
 139
 140         if (ret != KERN_SUCCESS)
 141                 panic("Failed to allocate bufferhdr_map");
 142
 143         buf = (struct buf *) firstaddr;
 144         bzero(buf, size);
 145
 146         {
 147                 int             scale;
 148
 149                 nmbclusters = bsd_mbuf_cluster_reserve() / MCLBYTES;
 150
 151                 if ((scale = nmbclusters / NMBCLUSTERS) > 1) {
 152                         tcp_sendspace *= scale;
 153                         tcp_recvspace *= scale;
 154
 155                         if (tcp_sendspace > (32 * 1024))
 156                                 tcp_sendspace = 32 * 1024;
 157                         if (tcp_recvspace > (32 * 1024))
 158                                 tcp_recvspace = 32 * 1024;
 159                 }
 160         }
 161
 162         /*
 163          * Size vnodes based on memory
 164          * Number vnodes  is (memsize/64k) + 1024
 165          * This is the calculation that is used by launchd in tiger
 166          * we are clipping the max based on 16G
 167          * ie ((16*1024*1024*1024)/(64 *1024)) + 1024 = 263168;
 168          */
 169         desiredvnodes  = (sane_size/65536) + 1024;
 170         if (desiredvnodes > 263168)
 171                 desiredvnodes = 263168;
 172 }
 173
 174 void
 175 bsd_bufferinit(void)
 176 {
 177         kern_return_t   ret;
 178
 179         cons.t_dev = makedev(12, 0);
 180
 181         bsd_startupearly();
 182
 183         ret = kmem_suballoc(kernel_map,
 184                             (vm_offset_t *) & mbutl,
 185                             (vm_size_t) (nmbclusters * MCLBYTES),
 186                             FALSE,
 187                             VM_FLAGS_ANYWHERE,
 188                             &mb_map);
 189
 190         if (ret != KERN_SUCCESS)
 191                 panic("Failed to allocate mb_map\n");
 192
 193         /*
 194          * Set up buffers, so they can be used to read disk labels.
 195          */
 196         bufinit();
 197 }
 198
 199 /*
 200  * this has been broken out into a separate routine that
 201  * can be called from the x86 early vm initialization to
 202  * determine how much lo memory to reserve on systems with
 203  * DMA hardware that can't fully address all of the physical
 204  * memory that is present.
 205  */
 206 int
 207 bsd_mbuf_cluster_reserve(void)
 208 {
 209         if (sane_size > (64 * 1024 * 1024) || ncl) {
 210
 211                 if ((nmbclusters = ncl) == 0) {
 212                         if ((nmbclusters = ((sane_size / 16)/MCLBYTES)) > 32768)
 213                                 nmbclusters = 32768;
 214                 }
 215         }
 216
 217         return (nmbclusters * MCLBYTES);
 218 }