bsd/kern/kern_mib.c

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