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 <sys/vnode.h>
  41 #include <sys/sysctl.h>
  42 #include <dev/ppc/cons.h>
  43
  44 extern vm_map_t mb_map;
  45
  46 extern u_long   tcp_sendspace;
  47 extern u_long   tcp_recvspace;
  48
  49 void            bsd_bufferinit(void);
  50 extern void     md_prepare_for_shutdown(int, int, char *);
  51
  52 int             bsd_mbuf_cluster_reserve(void);
  53
  54 /*
  55  * Declare these as initialized data so we can patch them.
  56  */
  57
  58 #ifdef  NBUF
  59 int             max_nbuf_headers = NBUF;
  60 int             niobuf = NBUF / 2;
  61 int             nbuf_hashelements = NBUF;
  62 int             nbuf = NBUF;
  63 #else
  64 int             max_nbuf_headers = 0;
  65 int             niobuf = 0;
  66 int             nbuf_hashelements = 0;
  67 int             nbuf = 0;
  68 #endif
  69
  70 SYSCTL_INT (_kern, OID_AUTO, nbuf, CTLFLAG_RD, &nbuf, 0, "");
  71 SYSCTL_INT (_kern, OID_AUTO, maxnbuf, CTLFLAG_RW, &max_nbuf_headers, 0, "");
  72
  73 __private_extern__ int customnbuf = 0;
  74 int             srv = 0;        /* Flag indicates a server boot when set */
  75 int             ncl = 0;
  76
  77 vm_map_t        buffer_map;
  78 vm_map_t        bufferhdr_map;
  79
  80
  81 extern void     bsd_startupearly(void);
  82
  83 void
  84 bsd_startupearly(void)
  85 {
  86         vm_offset_t     firstaddr;
  87         vm_size_t       size;
  88         kern_return_t   ret;
  89
  90         /* clip the number of buf headers upto 16k */
  91         if (max_nbuf_headers == 0)
  92                 max_nbuf_headers = atop(sane_size / 50);        /* Get 2% of ram, but no more than we can map */
  93         if ((customnbuf == 0) && (max_nbuf_headers > 16384))
  94                 max_nbuf_headers = 16384;
  95         if (max_nbuf_headers < 256)
  96                 max_nbuf_headers = 256;
  97
  98         /* clip the number of hash elements  to 200000 */
  99         if ( (customnbuf == 0 ) && nbuf_hashelements == 0) {
 100                 nbuf_hashelements = atop(sane_size / 50);
 101                 if (nbuf_hashelements > 200000)
 102                         nbuf_hashelements = 200000;
 103         } else
 104                 nbuf_hashelements = max_nbuf_headers;
 105
 106         if (niobuf == 0)
 107                 niobuf = max_nbuf_headers;
 108         if (niobuf > 4096)
 109                 niobuf = 4096;
 110         if (niobuf < 128)
 111                 niobuf = 128;
 112
 113         size = (max_nbuf_headers + niobuf) * sizeof(struct buf);
 114         size = round_page(size);
 115
 116         ret = kmem_suballoc(kernel_map,
 117                             &firstaddr,
 118                             size,
 119                             FALSE,
 120                             VM_FLAGS_ANYWHERE,
 121                             &bufferhdr_map);
 122
 123         if (ret != KERN_SUCCESS)
 124                 panic("Failed to create bufferhdr_map");
 125
 126         ret = kernel_memory_allocate(bufferhdr_map,
 127                                      &firstaddr,
 128                                      size,
 129                                      0,
 130                                      KMA_HERE | KMA_KOBJECT);
 131
 132         if (ret != KERN_SUCCESS)
 133                 panic("Failed to allocate bufferhdr_map");
 134
 135         buf = (struct buf *) firstaddr;
 136         bzero(buf, size);
 137
 138         {
 139                 int             scale;
 140
 141                 nmbclusters = bsd_mbuf_cluster_reserve() / MCLBYTES;
 142
 143                 if ((scale = nmbclusters / NMBCLUSTERS) > 1) {
 144                         tcp_sendspace *= scale;
 145                         tcp_recvspace *= scale;
 146
 147                         if (tcp_sendspace > (32 * 1024))
 148                                 tcp_sendspace = 32 * 1024;
 149                         if (tcp_recvspace > (32 * 1024))
 150                                 tcp_recvspace = 32 * 1024;
 151                 }
 152         }
 153
 154         /*
 155          * Size vnodes based on memory
 156          * Number vnodes  is (memsize/64k) + 1024
 157          * This is the calculation that is used by launchd in tiger
 158          * we are clipping the max based on 16G
 159          * ie ((16*1024*1024*1024)/(64 *1024)) + 1024 = 263168;
 160          */
 161         desiredvnodes  = (sane_size/65536) + 1024;
 162         if (desiredvnodes > 263168)
 163                 desiredvnodes = 263168;
 164 }
 165
 166 void
 167 bsd_bufferinit(void)
 168 {
 169         kern_return_t   ret;
 170
 171         cons.t_dev = makedev(12, 0);
 172
 173         bsd_startupearly();
 174
 175         ret = kmem_suballoc(kernel_map,
 176                             (vm_offset_t *) & mbutl,
 177                             (vm_size_t) (nmbclusters * MCLBYTES),
 178                             FALSE,
 179                             VM_FLAGS_ANYWHERE,
 180                             &mb_map);
 181
 182         if (ret != KERN_SUCCESS)
 183                 panic("Failed to allocate mb_map\n");
 184
 185         /*
 186          * Set up buffers, so they can be used to read disk labels.
 187          */
 188         bufinit();
 189 }
 190
 191 /*
 192  * this has been broken out into a separate routine that
 193  * can be called from the x86 early vm initialization to
 194  * determine how much lo memory to reserve on systems with
 195  * DMA hardware that can't fully address all of the physical
 196  * memory that is present.
 197  */
 198 int
 199 bsd_mbuf_cluster_reserve(void)
 200 {
 201         if (sane_size > (64 * 1024 * 1024) || ncl) {
 202
 203                 if ((nmbclusters = ncl) == 0) {
 204                         if ((nmbclusters = ((sane_size / 16)/MCLBYTES)) > 32768)
 205                                 nmbclusters = 32768;
 206                 }
 207         }
 208
 209         return (nmbclusters * MCLBYTES);
 210 }