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 withough 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  *      ibcs2_sysi86.c,v 1.1 1994/10/14 08:53:11 sos Exp
   30  */
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/sysctl.h>
   35 
   36 #include <i386/ibcs2/ibcs2_types.h>
   37 #include <i386/ibcs2/ibcs2_signal.h>
   38 #include <i386/ibcs2/ibcs2_util.h>
   39 #include <i386/ibcs2/ibcs2_proto.h>
   40 
   41 #define IBCS2_FP_NO     0       /* no fp support */
   42 #define IBCS2_FP_SW     1       /* software emulator */
   43 #define IBCS2_FP_287    2       /* 80287 FPU */
   44 #define IBCS2_FP_387    3       /* 80387 FPU */
   45 
   46 #define SI86_FPHW       40
   47 #define STIME           54
   48 #define SETNAME         56
   49 #define SI86_MEM        65
   50 
   51 extern int hw_float;
   52 
   53 int
   54 ibcs2_sysi86(struct proc *p, struct ibcs2_sysi86_args *args)
   55 {
   56         switch (SCARG(args, cmd)) {
   57         case SI86_FPHW: {       /* Floating Point information */
   58                 int val, error;
   59 
   60                 if (hw_float) val = IBCS2_FP_387;       /* FPU hardware */
   61                 else val = IBCS2_FP_SW;                 /* FPU emulator */
   62                         
   63                 if ((error = copyout(&val, SCARG(args, arg), sizeof(val))) != 0)
   64                         return error;
   65                 return 0;
   66                 }
   67 
   68         case STIME:       /* set the system time given pointer to long */
   69           /* gettimeofday; time.tv_sec = *args->arg; settimeofday */
   70                 return EINVAL;
   71 
   72         case SETNAME:  {  /* set hostname given string w/ len <= 7 chars */
   73                 int name[2];
   74                 int error;
   75 
   76                 if ((error = suser(p)))
   77                   return (error);
   78                 name[0] = CTL_KERN;
   79                 name[1] = KERN_HOSTNAME;
   80                 return (userland_sysctl(p, name, 2, 0, 0, 0, 
   81                         SCARG(args, arg), 7, 0));
   82         }
   83 
   84         case SI86_MEM:  /* size of physical memory */
   85                 p->p_retval[0] = ctob(physmem);
   86                 return 0;
   87 
   88         default:
   89 #ifdef DIAGNOSTIC
   90                 printf("IBCS2: 'sysi86' function %d(0x%x) "
   91                         "not implemented yet\n", SCARG(args, cmd), args->cmd);
   92 #endif
   93                 return EINVAL;
   94         }
   95 }

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