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 #if INET || INET6
  53 extern u_long   tcp_sendspace;
  54 extern u_long   tcp_recvspace;
  55 #endif
  56
  57 void            bsd_bufferinit(void) __attribute__((section("__TEXT, initcode")));
  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_headers = NBUF / 2;
  69 int             nbuf_hashelements = NBUF;
  70 int             nbuf_headers = NBUF;
  71 #else
  72 int             max_nbuf_headers = 0;
  73 int             niobuf_headers = 0;
  74 int             nbuf_hashelements = 0;
  75 int             nbuf_headers = 0;
  76 #endif
  77
  78 SYSCTL_INT (_kern, OID_AUTO, nbuf, CTLFLAG_RD, &nbuf_headers, 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) __attribute__((section("__TEXT, initcode")));
  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 < CONFIG_MIN_NBUF)
 104                 max_nbuf_headers = CONFIG_MIN_NBUF;
 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_headers == 0)
 115                 niobuf_headers = max_nbuf_headers;
 116         if (niobuf_headers > 4096)
 117                 niobuf_headers = 4096;
 118         if (niobuf_headers < CONFIG_MIN_NIOBUF)
 119                 niobuf_headers = CONFIG_MIN_NIOBUF;
 120
 121         size = (max_nbuf_headers + niobuf_headers) * 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_headers = (struct buf *) firstaddr;
 144         bzero(buf_headers, size);
 145
 146 #if SOCKETS
 147         {
 148                 int             scale;
 149
 150                 nmbclusters = bsd_mbuf_cluster_reserve() / MCLBYTES;
 151
 152 #if INET || INET6
 153                 if ((scale = nmbclusters / NMBCLUSTERS) > 1) {
 154                         tcp_sendspace *= scale;
 155                         tcp_recvspace *= scale;
 156
 157                         if (tcp_sendspace > (64 * 1024))
 158                                 tcp_sendspace = 64 * 1024;
 159                         if (tcp_recvspace > (64 * 1024))
 160                                 tcp_recvspace = 64 * 1024;
 161                 }
 162 #endif /* INET || INET6 */
 163         }
 164 #endif /* SOCKETS */
 165
 166         /*
 167          * Size vnodes based on memory
 168          * Number vnodes  is (memsize/64k) + 1024
 169          * This is the calculation that is used by launchd in tiger
 170          * we are clipping the max based on 16G
 171          * ie ((16*1024*1024*1024)/(64 *1024)) + 1024 = 263168;
 172          * CONFIG_VNODES is set to 263168 for "medium" configurations (the default)
 173          * but can be smaller or larger.
 174          */
 175         desiredvnodes  = (sane_size/65536) + 1024;
 176         if (desiredvnodes > CONFIG_VNODES)
 177                 desiredvnodes = CONFIG_VNODES;
 178 }
 179
 180 void
 181 bsd_bufferinit(void)
 182 {
 183         kern_return_t   ret;
 184
 185         cons.t_dev = makedev(12, 0);
 186
 187         bsd_startupearly();
 188
 189 #if SOCKETS
 190         ret = kmem_suballoc(kernel_map,
 191                             (vm_offset_t *) & mbutl,
 192                             (vm_size_t) (nmbclusters * MCLBYTES),
 193                             FALSE,
 194                             VM_FLAGS_ANYWHERE,
 195                             &mb_map);
 196
 197         if (ret != KERN_SUCCESS)
 198                 panic("Failed to allocate mb_map\n");
 199 #endif /* SOCKETS */
 200
 201         /*
 202          * Set up buffers, so they can be used to read disk labels.
 203          */
 204         bufinit();
 205 }
 206
 207
 208 /*
 209  * this has been broken out into a separate routine that
 210  * can be called from the x86 early vm initialization to
 211  * determine how much lo memory to reserve on systems with
 212  * DMA hardware that can't fully address all of the physical
 213  * memory that is present.
 214  */
 215 int
 216 bsd_mbuf_cluster_reserve(void)
 217 {
 218         if (sane_size > (64 * 1024 * 1024) || ncl) {
 219
 220                 if ((nmbclusters = ncl) == 0) {
 221                         if ((nmbclusters = ((sane_size / 16)/MCLBYTES)) > 32768)
 222                                 nmbclusters = 32768;
 223                 }
 224                 /* Make sure it's not odd in case ncl is manually set */
 225                 if (nmbclusters & 0x1)
 226                         --nmbclusters;
 227         }
 228
 229         return (nmbclusters * MCLBYTES);
 230 }