FreeBSD/Linux Kernel Cross Reference
sys/bsd/kern/kern_mib.c

     /*
      * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /*-
     * Copyright (c) 1982, 1986, 1989, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * This code is derived from software contributed to Berkeley by
     * Mike Karels at Berkeley Software Design, Inc.
     *
     * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
     * project, to make these variables more userfriendly.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)kern_sysctl.c       8.4 (Berkeley) 4/14/94
     */
    
    #include <sys/param.h>
    #include <sys/kernel.h>
    #include <sys/systm.h>
    #include <sys/sysctl.h>
    #include <sys/proc.h>
    #include <sys/unistd.h>
    
    #if defined(SMP)
    #include <machine/smp.h>
    #endif
    
    #include <sys/param.h>  /* XXX prune includes */
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/proc.h>
    #include <sys/file.h>
    #include <sys/vnode.h>
    #include <sys/unistd.h>
    #include <sys/buf.h>
    #include <sys/ioctl.h>
    #include <sys/namei.h>
    #include <sys/tty.h>
    #include <sys/disklabel.h>
    #include <sys/vm.h>
    #include <sys/sysctl.h>
    #include <sys/user.h>
    #include <mach/machine.h>
    #include <mach/mach_types.h>
    #include <mach/vm_param.h>
    #include <kern/task.h>
    #include <vm/vm_kern.h>
    #include <mach/host_info.h>
    
   extern vm_map_t bsd_pageable_map;
   
   #include <sys/mount.h>
   #include <sys/kdebug.h>
   
   #include <IOKit/IOPlatformExpert.h>
   #include <pexpert/pexpert.h>
   
   #include <machine/machine_routines.h>
   #include <machine/cpu_capabilities.h>
   
   
   SYSCTL_NODE(, 0,          sysctl, CTLFLAG_RW, 0,
           "Sysctl internal magic");
   SYSCTL_NODE(, CTL_KERN,   kern,   CTLFLAG_RW, 0,
           "High kernel, proc, limits &c");
   SYSCTL_NODE(, CTL_VM,     vm,     CTLFLAG_RW, 0,
           "Virtual memory");
   SYSCTL_NODE(, CTL_VFS,    vfs,     CTLFLAG_RW, 0,
           "File system");
   SYSCTL_NODE(, CTL_NET,    net,    CTLFLAG_RW, 0,
           "Network, (see socket.h)");
   SYSCTL_NODE(, CTL_DEBUG,  debug,  CTLFLAG_RW, 0,
           "Debugging");
   SYSCTL_NODE(, CTL_HW,     hw,     CTLFLAG_RW, 0,
           "hardware");
   SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
           "machine dependent");
   SYSCTL_NODE(, CTL_USER,   user,   CTLFLAG_RW, 0,
           "user-level");
   
   #define SYSCTL_RETURN(r, x)     SYSCTL_OUT(r, &x, sizeof(x))
   
   /******************************************************************************
    * hw.* MIB
    */
   
   #define CTLHW_RETQUAD   (1 << 31)
   
   /*
    * Supporting some variables requires us to do "real" work.  We 
    * gather some of that here.
    */
   static int
   sysctl_hw_generic SYSCTL_HANDLER_ARGS
   {
           char dummy[65];
           int  epochTemp;
           extern int vm_page_wire_count;
           ml_cpu_info_t cpu_info;
           int val, doquad;
           long long qval;
   
           /*
            * Test and mask off the 'return quad' flag.
            * Note that only some things here support it.
            */
           doquad = arg2 & CTLHW_RETQUAD;
           arg2 &= ~CTLHW_RETQUAD;
   
           ml_cpu_get_info(&cpu_info);
   
           /*
            * Handle various OIDs.
            *
            * OIDs that can return int or quad set val and qval and then break.
            * Errors and int-only values return inline.
            */
           switch (arg2) {
           case HW_NCPU:
                   {
                   host_basic_info_data_t hinfo;
                   kern_return_t kret;
                   int count = HOST_BASIC_INFO_COUNT;
   #define BSD_HOST 1
   
                           kret = host_info(BSD_HOST, HOST_BASIC_INFO, &hinfo, &count);
                           if (kret == KERN_SUCCESS) {
                                   return(SYSCTL_RETURN(req, hinfo.max_cpus));
                           } else {
                                   return(EINVAL);
                           }
                   }
           case HW_AVAILCPU:
                   {
                   host_basic_info_data_t hinfo;
                   kern_return_t kret;
                   int count = HOST_BASIC_INFO_COUNT;
   #define BSD_HOST 1
   
                           kret = host_info(BSD_HOST, HOST_BASIC_INFO, &hinfo, &count);
                           if (kret == KERN_SUCCESS) {
                                   return(SYSCTL_RETURN(req, hinfo.avail_cpus));
                           } else {
                                   return(EINVAL);
                           }
                   }
           case HW_CACHELINE:
                   val = cpu_info.cache_line_size;
                   qval = (long long)val;
                   break;
           case HW_L1ICACHESIZE:
                   val = cpu_info.l1_icache_size;
                   qval = (long long)val;
                   break;
           case HW_L1DCACHESIZE:
                   val = cpu_info.l1_dcache_size;
                   qval = (long long)val;
                   break;
           case HW_L2CACHESIZE:
                   if (cpu_info.l2_cache_size == 0xFFFFFFFF)
                           return(EINVAL);
                   val = cpu_info.l2_cache_size;
                   qval = (long long)val;
                   break;
           case HW_L3CACHESIZE:
                   if (cpu_info.l3_cache_size == 0xFFFFFFFF)
                           return(EINVAL);
                   val = cpu_info.l3_cache_size;
                   qval = (long long)val;
                   break;
   
                   /*
                    * Deprecated variables.  We still support these for
                    * backwards compatibility purposes only.
                    */
           case HW_MACHINE:
                   bzero(dummy, sizeof(dummy));
                   if(!PEGetMachineName(dummy,64))
                           return(EINVAL);
                   dummy[64] = 0;
                   return(SYSCTL_OUT(req, dummy, strlen(dummy) + 1));
           case HW_MODEL:
                   bzero(dummy, sizeof(dummy));
                   if(!PEGetModelName(dummy,64))
                           return(EINVAL);
                   dummy[64] = 0;
                   return(SYSCTL_OUT(req, dummy, strlen(dummy) + 1));
           case HW_USERMEM:
                   {
                   int usermem = mem_size - vm_page_wire_count * page_size;
   
                           return(SYSCTL_RETURN(req, usermem));
                   }
           case HW_EPOCH:
                   epochTemp = PEGetPlatformEpoch();
                   if (epochTemp == -1)
                           return(EINVAL);
                   return(SYSCTL_RETURN(req, epochTemp));
           case HW_VECTORUNIT:
                   return(SYSCTL_RETURN(req, cpu_info.vector_unit));
           case HW_L2SETTINGS:
                   if (cpu_info.l2_cache_size == 0xFFFFFFFF)
                           return(EINVAL);
                   return(SYSCTL_RETURN(req, cpu_info.l2_settings));
           case HW_L3SETTINGS:
                   if (cpu_info.l3_cache_size == 0xFFFFFFFF)
                           return(EINVAL);
                   return(SYSCTL_RETURN(req, cpu_info.l3_settings));
           default:
                   return(ENOTSUP);
           }
           /*
            * Callers may come to us with either int or quad buffers.
            */
           if (doquad) {
                   return(SYSCTL_RETURN(req, qval));
           }
           return(SYSCTL_RETURN(req, val));
   }
   
   /*
    * hw.* MIB variables.
    */
   SYSCTL_PROC    (_hw, HW_NCPU, ncpu, CTLTYPE_INT  | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_NCPU, sysctl_hw_generic, "I", "");
   SYSCTL_PROC    (_hw, HW_AVAILCPU, activecpu, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_AVAILCPU, sysctl_hw_generic, "I", "");
   SYSCTL_INT     (_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD | CTLFLAG_KERN, NULL, BYTE_ORDER, "");
   SYSCTL_INT     (_hw, OID_AUTO, cputype, CTLFLAG_RD | CTLFLAG_KERN, &machine_slot[0].cpu_type, 0, "");
   SYSCTL_INT     (_hw, OID_AUTO, cpusubtype, CTLFLAG_RD | CTLFLAG_KERN, &machine_slot[0].cpu_subtype, 0, "");
   SYSCTL_INT2QUAD(_hw, OID_AUTO, pagesize, CTLFLAG_RD | CTLFLAG_KERN, &page_size, "");
   SYSCTL_QUAD    (_hw, OID_AUTO, busfrequency, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.bus_frequency_hz, "");
   SYSCTL_QUAD    (_hw, OID_AUTO, busfrequency_min, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.bus_frequency_min_hz, "");
   SYSCTL_QUAD    (_hw, OID_AUTO, busfrequency_max, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.bus_frequency_max_hz, "");
   SYSCTL_QUAD    (_hw, OID_AUTO, cpufrequency, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.cpu_frequency_hz, "");
   SYSCTL_QUAD    (_hw, OID_AUTO, cpufrequency_min, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.cpu_frequency_min_hz, "");
   SYSCTL_QUAD    (_hw, OID_AUTO, cpufrequency_max, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.cpu_frequency_max_hz, "");
   SYSCTL_PROC    (_hw, OID_AUTO, cachelinesize, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_CACHELINE | CTLHW_RETQUAD, sysctl_hw_generic, "Q", "");
   SYSCTL_PROC    (_hw, OID_AUTO, l1icachesize, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_L1ICACHESIZE | CTLHW_RETQUAD, sysctl_hw_generic, "Q", "");
   SYSCTL_PROC    (_hw, OID_AUTO, l1dcachesize, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_L1DCACHESIZE | CTLHW_RETQUAD, sysctl_hw_generic, "Q", "");
   SYSCTL_PROC    (_hw, OID_AUTO, l2cachesize, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_L2CACHESIZE | CTLHW_RETQUAD, sysctl_hw_generic, "Q", "");
   SYSCTL_PROC    (_hw, OID_AUTO, l3cachesize, CTLTYPE_QUAD | CTLFLAG_RD | CTLFLAG_KERN, 0, HW_L3CACHESIZE | CTLHW_RETQUAD, sysctl_hw_generic, "Q", "");
   SYSCTL_INT2QUAD(_hw, OID_AUTO, tbfrequency, CTLFLAG_RD | CTLFLAG_KERN, &gPEClockFrequencyInfo.timebase_frequency_hz, "");
   SYSCTL_QUAD    (_hw, HW_MEMSIZE, memsize, CTLFLAG_RD | CTLFLAG_KERN, &max_mem, "");
   
   /*
    * Optional features can register nodes below hw.optional.
    *
    * If the feature is not present, the node should either not be registered,
    * or it should return -1.  If the feature is present, the node should return
    * 0.  If the feature is present and its use is advised, the node should 
    * return 1.
    */
   SYSCTL_NODE(_hw, OID_AUTO, optional, CTLFLAG_RW, NULL, "optional features");
   
   SYSCTL_INT(_hw_optional, OID_AUTO, floatingpoint, CTLFLAG_RD | CTLFLAG_KERN, 0, 1, ""); /* always set */
   
   /*
    * Deprecated variables.  These are supported for backwards compatibility
    * purposes only.  The MASKED flag requests that the variables not be
    * printed by sysctl(8) and similar utilities.
    *
    * The variables named *_compat here are int-sized versions of variables
    * that are now exported as quads.  The int-sized versions are normally
    * looked up only by number, wheras the quad-sized versions should be
    * looked up by name.
    *
    * The *_compat nodes are *NOT* visible within the kernel.
    */
   SYSCTL_INT (_hw, HW_PAGESIZE,     pagesize_compat, CTLFLAG_RD | CTLFLAG_MASKED, &page_size, 0, "");
   SYSCTL_INT (_hw, HW_BUS_FREQ,     busfrequency_compat, CTLFLAG_RD | CTLFLAG_MASKED, &gPEClockFrequencyInfo.bus_clock_rate_hz, 0, "");
   SYSCTL_INT (_hw, HW_CPU_FREQ,     cpufrequency_compat, CTLFLAG_RD | CTLFLAG_MASKED, &gPEClockFrequencyInfo.cpu_clock_rate_hz, 0, "");
   SYSCTL_PROC(_hw, HW_CACHELINE,    cachelinesize_compat, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_CACHELINE, sysctl_hw_generic, "I", "");
   SYSCTL_PROC(_hw, HW_L1ICACHESIZE, l1icachesize_compat, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L1ICACHESIZE, sysctl_hw_generic, "I", "");
   SYSCTL_PROC(_hw, HW_L1DCACHESIZE, l1dcachesize_compat, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L1DCACHESIZE, sysctl_hw_generic, "I", "");
   SYSCTL_PROC(_hw, HW_L2CACHESIZE,  l2cachesize_compat, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L2CACHESIZE, sysctl_hw_generic, "I", "");
   SYSCTL_PROC(_hw, HW_L3CACHESIZE,  l3cachesize_compat, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L3CACHESIZE, sysctl_hw_generic, "I", "");
   SYSCTL_INT (_hw, HW_TB_FREQ,      tbfrequency_compat, CTLFLAG_RD | CTLFLAG_MASKED, &gPEClockFrequencyInfo.timebase_frequency_hz, 0, "");
   SYSCTL_PROC(_hw, HW_MACHINE,      machine, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_MACHINE, sysctl_hw_generic, "A", "");
   SYSCTL_PROC(_hw, HW_MODEL,        model, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_MODEL, sysctl_hw_generic, "A", "");
   SYSCTL_UINT(_hw, HW_PHYSMEM,      physmem, CTLFLAG_RD | CTLFLAG_MASKED, &mem_size, 0, "");
   SYSCTL_PROC(_hw, HW_USERMEM,      usermem, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_USERMEM,    sysctl_hw_generic, "I", "");
   SYSCTL_PROC(_hw, HW_EPOCH,        epoch, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_EPOCH, sysctl_hw_generic, "I", "");
   SYSCTL_PROC(_hw, HW_VECTORUNIT,   vectorunit, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_VECTORUNIT, sysctl_hw_generic, "I", "");
   SYSCTL_PROC(_hw, HW_L2SETTINGS,   l2settings, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L2SETTINGS, sysctl_hw_generic, "I", "");
   SYSCTL_PROC(_hw, HW_L3SETTINGS,   l3settings, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MASKED, 0, HW_L3SETTINGS, sysctl_hw_generic, "I", "");
   
   /******************************************************************************
    * Generic MIB initialisation.
    *
    * This is a hack, and should be replaced with SYSINITs
    * at some point.
    */
   void
   sysctl_mib_init(void)
   {
           
           /*
            * Populate the optional portion of the hw.* MIB.
            *
            * XXX This could be broken out into parts of the code
            *     that actually directly relate to the functions in
            *     question.
            */
   #ifdef __ppc__
           {
                   static int altivec_flag = -1;
                   static SYSCTL_INT(_hw_optional, OID_AUTO, altivec, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &altivec_flag, 0, "");
   
                   if (_cpu_capabilities & kHasAltivec) {
                           altivec_flag = 1;
                           sysctl_register_oid(&sysctl__hw_optional_altivec);
                   }
           }
           {
                   static int graphicsops_flag = -1;
                   static SYSCTL_INT(_hw_optional, OID_AUTO, graphicsops, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &graphicsops_flag, 0, "");
   
                   if (_cpu_capabilities & kHasGraphicsOps) {
                           graphicsops_flag = 1;
                           sysctl_register_oid(&sysctl__hw_optional_graphicsops);
                   }               
           }
           {
                   static int x64bitops_flag = -1;
                   static SYSCTL_INT(_hw_optional, OID_AUTO, 64bitops, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &x64bitops_flag, 0, "");
   
                   if (_cpu_capabilities & k64Bit) {
                           x64bitops_flag = 1;
                           sysctl_register_oid(&sysctl__hw_optional_64bitops);
                   }               
           }
           {
                   static int fsqrt_flag = -1;
                   static SYSCTL_INT(_hw_optional, OID_AUTO, fsqrt, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &fsqrt_flag, 0, "");
   
                   if (_cpu_capabilities & kHasFsqrt) {
                           fsqrt_flag = 1;
                           sysctl_register_oid(&sysctl__hw_optional_fsqrt);
                   }               
           }
           {
                   static int stfiwx_flag = -1;
                   static SYSCTL_INT(_hw_optional, OID_AUTO, stfiwx, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &stfiwx_flag, 0, "");
   
                   if (_cpu_capabilities & kHasStfiwx) {
                           stfiwx_flag = 1;
                           sysctl_register_oid(&sysctl__hw_optional_stfiwx);
                   }               
           }
           {
                   static int dcba_flag = -1;
                   static SYSCTL_INT(_hw_optional, OID_AUTO, dcba, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &dcba_flag, 0, "");
   
                   if (_cpu_capabilities & kDcbaAvailable)
                           dcba_flag = 0;
                   if (_cpu_capabilities & kDcbaRecommended)
                           dcba_flag = 1;
                   if (dcba_flag >= 0)
                           sysctl_register_oid(&sysctl__hw_optional_dcba);
           }
           {
                   static int datastreams_flag = -1;
                   static SYSCTL_INT(_hw_optional, OID_AUTO, datastreams, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &datastreams_flag, 0, "");
   
                   if (_cpu_capabilities & kDataStreamsAvailable)
                           datastreams_flag = 0;
                   if (_cpu_capabilities & kDataStreamsRecommended)
                           datastreams_flag = 1;
                   if (datastreams_flag >= 0)
                           sysctl_register_oid(&sysctl__hw_optional_datastreams);
           }
           {
                   static int dcbtstreams_flag = -1;
                   static SYSCTL_INT(_hw_optional, OID_AUTO, dcbtstreams, CTLFLAG_RD | CTLFLAG_NOAUTO | CTLFLAG_KERN, &dcbtstreams_flag, 0, "");
   
                   if (_cpu_capabilities & kDcbtStreamsAvailable)
                           dcbtstreams_flag = 0;
                   if (_cpu_capabilities & kDcbtStreamsRecommended)
                           dcbtstreams_flag = 1;
                   if (dcbtstreams_flag >= 0)
                           sysctl_register_oid(&sysctl__hw_optional_dcbtstreams);
           }
   #else
   # warning we do not support this platform yet
   #endif /* __ppc__ */
   
   
   }

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