bsd/kern/kern_mib.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*-
  26  * Copyright (c) 1982, 1986, 1989, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * This code is derived from software contributed to Berkeley by
  30  * Mike Karels at Berkeley Software Design, Inc.
  31  *
  32  * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
  33  * project, to make these variables more userfriendly.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. All advertising materials mentioning features or use of this software
  44  *    must display the following acknowledgement:
  45  *      This product includes software developed by the University of
  46  *      California, Berkeley and its contributors.
  47  * 4. Neither the name of the University nor the names of its contributors
  48  *    may be used to endorse or promote products derived from this software
  49  *    without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  61  * SUCH DAMAGE.
  62  *
  63  *      @(#)kern_sysctl.c       8.4 (Berkeley) 4/14/94
  64  */
  65
  66 #include <sys/param.h>
  67 #include <sys/kernel.h>
  68 #include <sys/systm.h>
  69 #include <sys/sysctl.h>
  70 #include <sys/proc.h>
  71 #include <sys/unistd.h>
  72
  73 #if defined(SMP)
  74 #include <machine/smp.h>
  75 #endif
  76
  77 #include <sys/param.h>  /* XXX prune includes */
  78 #include <sys/systm.h>
  79 #include <sys/kernel.h>
  80 #include <sys/malloc.h>
  81 #include <sys/proc.h>
  82 #include <sys/file.h>
  83 #include <sys/vnode.h>
  84 #include <sys/unistd.h>
  85 #include <sys/buf.h>
  86 #include <sys/ioctl.h>
  87 #include <sys/namei.h>
  88 #include <sys/tty.h>
  89 #include <sys/disklabel.h>
  90 #include <sys/vm.h>
  91 #include <sys/sysctl.h>
  92 #include <sys/user.h>
  93 #include <mach/machine.h>
  94 #include <mach/mach_types.h>
  95 #include <mach/vm_param.h>
  96 #include <kern/task.h>
  97 #include <vm/vm_kern.h>
  98 #include <mach/host_info.h>
  99
 100 extern vm_map_t bsd_pageable_map;
 101
 102 #include <sys/mount.h>
 103 #include <sys/kdebug.h>
 104
 105 #include <IOKit/IOPlatformExpert.h>
 106 #include <pexpert/pexpert.h>
 107
 108 #include <machine/machine_routines.h>
 109 #include <machine/cpu_capabilities.h>
 110
 111
 112 SYSCTL_NODE(, 0,          sysctl, CTLFLAG_RW, 0,
 113         "Sysctl internal magic");
 114 SYSCTL_NODE(, CTL_KERN,   kern,   CTLFLAG_RW, 0,
 115         "High kernel, proc, limits &c");
 116 SYSCTL_NODE(, CTL_VM,     vm,     CTLFLAG_RW, 0,
 117         "Virtual memory");
 118 SYSCTL_NODE(, CTL_VFS,    vfs,     CTLFLAG_RW, 0,
 119         "File system");
 120 SYSCTL_NODE(, CTL_NET,    net,    CTLFLAG_RW, 0,
 121         "Network, (see socket.h)");
 122 SYSCTL_NODE(, CTL_DEBUG,  debug,  CTLFLAG_RW, 0,
 123         "Debugging");
 124 SYSCTL_NODE(, CTL_HW,     hw,     CTLFLAG_RW, 0,
 125         "hardware");
 126 SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
 127         "machine dependent");
 128 SYSCTL_NODE(, CTL_USER,   user,   CTLFLAG_RW, 0,
 129         "user-level");
 130
 131 #define SYSCTL_RETURN(r, x)     SYSCTL_OUT(r, &x, sizeof(x))
 132
 133 /******************************************************************************
 134  * hw.* MIB
 135  */
 136
 137 #define CTLHW_RETQUAD   (1 << 31)
 138
 139 /*
 140  * Supporting some variables requires us to do "real" work.  We
 141  * gather some of that here.
 142  */
 143 static int
 144 sysctl_hw_generic SYSCTL_HANDLER_ARGS
 145 {
 146         char dummy[65];
 147         int  epochTemp;
 148         extern int vm_page_wire_count;
 149         ml_cpu_info_t cpu_info;
 150         int val, doquad;
 151         long long qval;
 152
 153         /*
 154          * Test and mask off the 'return quad' flag.
 155          * Note that only some things here support it.
 156          */
 157         doquad = arg2 & CTLHW_RETQUAD;
 158         arg2 &= ~CTLHW_RETQUAD;
 159
 160         ml_cpu_get_info(&cpu_info);
 161
 162         /*
 163          * Handle various OIDs.
 164          *
 165          * OIDs that can return int or quad set val and qval and then break.
 166          * Errors and int-only values return inline.
 167          */
 168         switch (arg2) {
 169         case HW_NCPU:
 170                 {
 171                 host_basic_info_data_t hinfo;
 172                 kern_return_t kret;
 173                 int count = HOST_BASIC_INFO_COUNT;
 174 #define BSD_HOST 1
 175
 176                         kret = host_info(BSD_HOST, HOST_BASIC_INFO, &hinfo, &count);
 177                         if (kret == KERN_SUCCESS) {
 178                                 return(SYSCTL_RETURN(req, hinfo.max_cpus));
 179                         } else {
 180                                 return(EINVAL);
 181                         }
 182                 }
 183         case HW_AVAILCPU:
 184                 {
 185                 host_basic_info_data_t hinfo;
 186                 kern_return_t kret;
 187                 int count = HOST_BASIC_INFO_COUNT;
 188 #define BSD_HOST 1
 189
 190                         kret = host_info(BSD_HOST, HOST_BASIC_INFO, &hinfo, &count);
 191                         if (kret == KERN_SUCCESS) {
 192                                 return(SYSCTL_RETURN(req, hinfo.avail_cpus));
 193                         } else {
 194                                 return(EINVAL);
 195                         }
 196                 }
 197         case HW_CACHELINE:
 198                 val = cpu_info.cache_line_size;
 199                 qval = (long long)val;
 200                 break;
 201         case HW_L1ICACHESIZE:
 202                 val = cpu_info.l1_icache_size;
 203                 qval = (long long)val;
 204                 break;
 205         case HW_L1DCACHESIZE:
 206                 val = cpu_info.l1_dcache_size;
 207                 qval = (long long)val;
 208                 break;
 209         case HW_L2CACHESIZE:
 210                 if (cpu_info.l2_cache_size == 0xFFFFFFFF)
 211                         return(EINVAL);
 212                 val = cpu_info.l2_cache_size;
 213                 qval = (long long)val;
 214                 break;
 215         case HW_L3CACHESIZE:
 216                 if (cpu_info.l3_cache_size == 0xFFFFFFFF)
 217                         return(EINVAL);
 218                 val = cpu_info.l3_cache_size;
 219                 qval = (long long)val;
 220                 break;
 221
 222                 /*
 223                  * Deprecated variables.  We still support these for
 224                  * backwards compatibility purposes only.
 225                  */
 226         case HW_MACHINE:
 227                 bzero(dummy, sizeof(dummy));
 228                 if(!PEGetMachineName(dummy,64))
 229                         return(EINVAL);
 230                 dummy[64] = 0;
 231                 return(SYSCTL_OUT(req, dummy, strlen(dummy) + 1));
 232         case HW_MODEL:
 233                 bzero(dummy, sizeof(dummy));
 234                 if(!PEGetModelName(dummy,64))
 235                         return(EINVAL);
 236                 dummy[64] = 0;
 237                 return(SYSCTL_OUT(req, dummy, strlen(dummy) + 1));
 238         case HW_USERMEM:
 239                 {
 240                 int usermem = mem_size - vm_page_wire_count * page_size;
 241
 242                         return(SYSCTL_RETURN(req, usermem));
 243                 }
 244         case HW_EPOCH:
 245                 epochTemp = PEGetPlatformEpoch();
 246                 if (epochTemp == -1)
 247                         return(EINVAL);
 248                 return(SYSCTL_RETURN(req, epochTemp));
 249         case HW_VECTORUNIT:
 250                 return(SYSCTL_RETURN(req, cpu_info.vector_unit));
 251         case HW_L2SETTINGS:
 252                 if (cpu_info.l2_cache_size == 0xFFFFFFFF)
 253                         return(EINVAL);
 254                 return(SYSCTL_RETURN(req, cpu_info.l2_settings));
 255         case HW_L3SETTINGS:
 256                 if (cpu_info.l3_cache_size == 0xFFFFFFFF)
 257                         return(EINVAL);
 258                 return(SYSCTL_RETURN(req, cpu_info.l3_settings));
 259         default:
 260                 return(ENOTSUP);
 261         }
 262         /*
 263          * Callers may come to us with either int or quad buffers.
 264          */
 265         if (doquad) {
 266                 return(SYSCTL_RETURN(req, qval));
 267         }
 268         return(SYSCTL_RETURN(req, val));
 269 }
 270
 271 /*
 272  * hw.* MIB variables.
 273  */
 274 SYSCTL_PROC    (_hw, HW_NCPU, ncpu, CTLTYPE_INT  | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_NCPU, sysctl_hw_generic, "I", "");
 275 SYSCTL_PROC    (_hw, HW_AVAILCPU, activecpu, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_AVAILCPU, sysctl_hw_generic, "I", "");
 276 SYSCTL_INT     (_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD | CTLFLAG_KERN, NULL, BYTE_ORDER, "");
 277 SYSCTL_INT     (_hw, OID_AUTO, cputype, CTLFLAG_RD | CTLFLAG_KERN, &machine_slot[0].cpu_type, 0, "");
 278 SYSCTL_INT     (_hw, OID_AUTO, cpusubtype, CTLFLAG_RD | CTLFLAG_KERN, &machine_slot[0].cpu_subtype, 0, "");
 279 SYSCTL_INT2QUAD(_hw, OID_AUTO, pagesize, CTLFLAG_RD | CTLFLAG_KERN, &page_size, "");
 280 SYSCTL_QUAD    (_hw, OID_AUTO, busfrequency, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.bus_frequency_hz, "");
 281 SYSCTL_QUAD    (_hw, OID_AUTO, busfrequency_min, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.bus_frequency_min_hz, "");
 282 SYSCTL_QUAD    (_hw, OID_AUTO, busfrequency_max, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.bus_frequency_max_hz, "");
 283 SYSCTL_QUAD    (_hw, OID_AUTO, cpufrequency, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.cpu_frequency_hz, "");
 284 SYSCTL_QUAD    (_hw, OID_AUTO, cpufrequency_min, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.cpu_frequency_min_hz, "");
 285 SYSCTL_QUAD    (_hw, OID_AUTO, cpufrequency_max, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.cpu_frequency_max_hz, "");
 286 SYSCTL_PROC    (_hw, OID_AUTO, cachelinesize, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_CACHELINE | CTLHW_RETQUAD, sysctl_hw_generic, "Q", "");
 287 SYSCTL_PROC    (_hw, OID_AUTO, l1icachesize, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_L1ICACHESIZE | CTLHW_RETQUAD, sysctl_hw_generic, "Q", "");
 288 SYSCTL_PROC    (_hw, OID_AUTO, l1dcachesize, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_L1DCACHESIZE | CTLHW_RETQUAD, sysctl_hw_generic, "Q", "");
 289 SYSCTL_PROC    (_hw, OID_AUTO, l2cachesize, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_L2CACHESIZE | CTLHW_RETQUAD, sysctl_hw_generic, "Q", "");
 290 SYSCTL_PROC    (_hw, OID_AUTO, l3cachesize, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_L3CACHESIZE | CTLHW_RETQUAD, sysctl_hw_generic, "Q", "");
 291 SYSCTL_INT2QUAD(_hw, OID_AUTO, tbfrequency, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.timebase_frequency_hz, "");
 292 SYSCTL_QUAD    (_hw, HW_MEMSIZE, memsize, CTLFLAG_RD | CTLFLAG_KERN, &max_mem, "");
 293
 294 /*
 295  * Optional features can register nodes below hw.optional.
 296  *
 297  * If the feature is not present, the node should either not be registered,
 298  * or it should return -1.  If the feature is present, the node should return
 299  * 0.  If the feature is present and its use is advised, the node should
 300  * return 1.
 301  */
 302 SYSCTL_NODE(_hw, OID_AUTO, optional, CTLFLAG_RW, NULL, "optional features");
 303
 304 SYSCTL_INT(_hw_optional, OID_AUTO, floatingpoint, CTLFLAG_RD | CTLFLAG_KERN, 0, 1, ""); /* always set */
 305
 306 /*
 307  * Deprecated variables.  These are supported for backwards compatibility
 308  * purposes only.  The MASKED flag requests that the variables not be
 309  * printed by sysctl(8) and similar utilities.
 310  *
 311  * The variables named *_compat here are int-sized versions of variables
 312  * that are now exported as quads.  The int-sized versions are normally
 313  * looked up only by number, wheras the quad-sized versions should be
 314  * looked up by name.
 315  *
 316  * The *_compat nodes are *NOT* visible within the kernel.
 317  */
 318 SYSCTL_INT (_hw, HW_PAGESIZE,     pagesize_compat, CTLFLAG_RD | CTLFLAG_MASKED, &page_size, 0, "");
 319 SYSCTL_INT (_hw, HW_BUS_FREQ,     busfrequency_compat, CTLFLAG_RD | CTLFLAG_MASKED, &gPEClockFrequencyInfo.bus_clock_rate_hz, 0, "");
 320 SYSCTL_INT (_hw, HW_CPU_FREQ,     cpufrequency_compat, CTLFLAG_RD | CTLFLAG_MASKED, &gPEClockFrequencyInfo.cpu_clock_rate_hz, 0, "");
 321 SYSCTL_PROC(_hw, HW_CACHELINE,    cachelinesize_compat, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_CACHELINE, sysctl_hw_generic, "I", "");
 322 SYSCTL_PROC(_hw, HW_L1ICACHESIZE, l1icachesize_compat, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L1ICACHESIZE, sysctl_hw_generic, "I", "");
 323 SYSCTL_PROC(_hw, HW_L1DCACHESIZE, l1dcachesize_compat, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L1DCACHESIZE, sysctl_hw_generic, "I", "");
 324 SYSCTL_PROC(_hw, HW_L2CACHESIZE,  l2cachesize_compat, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L2CACHESIZE, sysctl_hw_generic, "I", "");
 325 SYSCTL_PROC(_hw, HW_L3CACHESIZE,  l3cachesize_compat, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L3CACHESIZE, sysctl_hw_generic, "I", "");
 326 SYSCTL_INT (_hw, HW_TB_FREQ,      tbfrequency_compat, CTLFLAG_RD | CTLFLAG_MASKED, &gPEClockFrequencyInfo.timebase_frequency_hz, 0, "");
 327 SYSCTL_PROC(_hw, HW_MACHINE,      machine, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_MACHINE, sysctl_hw_generic, "A", "");
 328 SYSCTL_PROC(_hw, HW_MODEL,        model, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_MODEL, sysctl_hw_generic, "A", "");
 329 SYSCTL_UINT(_hw, HW_PHYSMEM,      physmem, CTLFLAG_RD | CTLFLAG_MASKED, &mem_size, 0, "");
 330 SYSCTL_PROC(_hw, HW_USERMEM,      usermem, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_USERMEM,    sysctl_hw_generic, "I", "");
 331 SYSCTL_PROC(_hw, HW_EPOCH,        epoch, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_EPOCH, sysctl_hw_generic, "I", "");
 332 SYSCTL_PROC(_hw, HW_VECTORUNIT,   vectorunit, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_VECTORUNIT, sysctl_hw_generic, "I", "");
 333 SYSCTL_PROC(_hw, HW_L2SETTINGS,   l2settings, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L2SETTINGS, sysctl_hw_generic, "I", "");
 334 SYSCTL_PROC(_hw, HW_L3SETTINGS,   l3settings, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L3SETTINGS, sysctl_hw_generic, "I", "");
 335
 336 /******************************************************************************
 337  * Generic MIB initialisation.
 338  *
 339  * This is a hack, and should be replaced with SYSINITs
 340  * at some point.
 341  */
 342 void
 343 sysctl_mib_init(void)
 344 {
 345
 346         /*
 347          * Populate the optional portion of the hw.* MIB.
 348          *
 349          * XXX This could be broken out into parts of the code
 350          *     that actually directly relate to the functions in
 351          *     question.
 352          */
 353 #ifdef __ppc__
 354         {
 355                 static int altivec_flag = -1;
 356                 static SYSCTL_INT(_hw_optional, OID_AUTO, altivec, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &altivec_flag, 0, "");
 357
 358                 if (_cpu_capabilities & kHasAltivec) {
 359                         altivec_flag = 1;
 360                         sysctl_register_oid(&sysctl__hw_optional_altivec);
 361                 }
 362         }
 363         {
 364                 static int graphicsops_flag = -1;
 365                 static SYSCTL_INT(_hw_optional, OID_AUTO, graphicsops, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &graphicsops_flag, 0, "");
 366
 367                 if (_cpu_capabilities & kHasGraphicsOps) {
 368                         graphicsops_flag = 1;
 369                         sysctl_register_oid(&sysctl__hw_optional_graphicsops);
 370                 }
 371         }
 372         {
 373                 static int x64bitops_flag = -1;
 374                 static SYSCTL_INT(_hw_optional, OID_AUTO, 64bitops, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &x64bitops_flag, 0, "");
 375
 376                 if (_cpu_capabilities & k64Bit) {
 377                         x64bitops_flag = 1;
 378                         sysctl_register_oid(&sysctl__hw_optional_64bitops);
 379                 }
 380         }
 381         {
 382                 static int fsqrt_flag = -1;
 383                 static SYSCTL_INT(_hw_optional, OID_AUTO, fsqrt, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &fsqrt_flag, 0, "");
 384
 385                 if (_cpu_capabilities & kHasFsqrt) {
 386                         fsqrt_flag = 1;
 387                         sysctl_register_oid(&sysctl__hw_optional_fsqrt);
 388                 }
 389         }
 390         {
 391                 static int stfiwx_flag = -1;
 392                 static SYSCTL_INT(_hw_optional, OID_AUTO, stfiwx, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &stfiwx_flag, 0, "");
 393
 394                 if (_cpu_capabilities & kHasStfiwx) {
 395                         stfiwx_flag = 1;
 396                         sysctl_register_oid(&sysctl__hw_optional_stfiwx);
 397                 }
 398         }
 399         {
 400                 static int dcba_flag = -1;
 401                 static SYSCTL_INT(_hw_optional, OID_AUTO, dcba, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &dcba_flag, 0, "");
 402
 403                 if (_cpu_capabilities & kDcbaAvailable)
 404                         dcba_flag = 0;
 405                 if (_cpu_capabilities & kDcbaRecommended)
 406                         dcba_flag = 1;
 407                 if (dcba_flag >= 0)
 408                         sysctl_register_oid(&sysctl__hw_optional_dcba);
 409         }
 410         {
 411                 static int datastreams_flag = -1;
 412                 static SYSCTL_INT(_hw_optional, OID_AUTO, datastreams, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &datastreams_flag, 0, "");
 413
 414                 if (_cpu_capabilities & kDataStreamsAvailable)
 415                         datastreams_flag = 0;
 416                 if (_cpu_capabilities & kDataStreamsRecommended)
 417                         datastreams_flag = 1;
 418                 if (datastreams_flag >= 0)
 419                         sysctl_register_oid(&sysctl__hw_optional_datastreams);
 420         }
 421         {
 422                 static int dcbtstreams_flag = -1;
 423                 static SYSCTL_INT(_hw_optional, OID_AUTO, dcbtstreams, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &dcbtstreams_flag, 0, "");
 424
 425                 if (_cpu_capabilities & kDcbtStreamsAvailable)
 426                         dcbtstreams_flag = 0;
 427                 if (_cpu_capabilities & kDcbtStreamsRecommended)
 428                         dcbtstreams_flag = 1;
 429                 if (dcbtstreams_flag >= 0)
 430                         sysctl_register_oid(&sysctl__hw_optional_dcbtstreams);
 431         }
 432 #else
 433 # warning we do not support this platform yet
 434 #endif /* __ppc__ */
 435
 436
 437 }