The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/ibcs2/ibcs2_sysi86.c

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    1 /*-
    2  * Copyright (c) 1994 Søren Schmidt
    3  * Copyright (c) 1995 Steven Wallace
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer
   11  *    in this position and unchanged.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. The name of the author may not be used to endorse or promote products
   16  *    derived from this software without specific prior written permission
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/5.2/sys/i386/ibcs2/ibcs2_sysi86.c 115684 2003-06-02 06:48:51Z obrien $");
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/sysctl.h>
   36 
   37 #include <i386/ibcs2/ibcs2_types.h>
   38 #include <i386/ibcs2/ibcs2_signal.h>
   39 #include <i386/ibcs2/ibcs2_util.h>
   40 #include <i386/ibcs2/ibcs2_proto.h>
   41 
   42 #define IBCS2_FP_NO     0       /* no fp support */
   43 #define IBCS2_FP_SW     1       /* software emulator */
   44 #define IBCS2_FP_287    2       /* 80287 FPU */
   45 #define IBCS2_FP_387    3       /* 80387 FPU */
   46 
   47 #define SI86_FPHW       40
   48 #define STIME           54
   49 #define SETNAME         56
   50 #define SI86_MEM        65
   51 
   52 extern int hw_float;
   53 
   54 int
   55 ibcs2_sysi86(struct thread *td, struct ibcs2_sysi86_args *args)
   56 {
   57         switch (args->cmd) {
   58         case SI86_FPHW: {       /* Floating Point information */
   59                 int val, error;
   60 
   61                 if (hw_float) val = IBCS2_FP_387;       /* FPU hardware */
   62                 else val = IBCS2_FP_SW;                 /* FPU emulator */
   63                         
   64                 if ((error = copyout(&val, args->arg, sizeof(val))) != 0)
   65                         return error;
   66                 return 0;
   67                 }
   68 
   69         case STIME:       /* set the system time given pointer to long */
   70           /* gettimeofday; time.tv_sec = *args->arg; settimeofday */
   71                 return EINVAL;
   72 
   73         case SETNAME:  {  /* set hostname given string w/ len <= 7 chars */
   74                 int name[2];
   75                 int error;
   76 
   77                 if ((error = suser(td)))
   78                   return (error);
   79                 name[0] = CTL_KERN;
   80                 name[1] = KERN_HOSTNAME;
   81                 return (userland_sysctl(td, name, 2, 0, 0, 0, 
   82                         args->arg, 7, 0));
   83         }
   84 
   85         case SI86_MEM:  /* size of physical memory */
   86                 td->td_retval[0] = ctob(physmem);
   87                 return 0;
   88 
   89         default:
   90 #ifdef DIAGNOSTIC
   91                 printf("IBCS2: 'sysi86' function %d(0x%x) "
   92                         "not implemented yet\n", args->cmd, args->cmd);
   93 #endif
   94                 return EINVAL;
   95         }
   96 }

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