source: trunk/third/xntp/kernel/clkinit.c @ 10832

/*
**      dynamically loadable clk driver
**
**      /src/NTP/REPOSITORY/v3/kernel/clkinit.c,v 1.1.1.1 1994/07/11 07:56:25 kardel Exp
**
**      william robertson <rob@agate.berkeley.edu>  
*/

#include <sys/types.h>
#include <sys/conf.h>
#include <sys/errno.h>
#include <sys/stream.h>
#include <sys/syslog.h>

#include <sun/openprom.h>
#include <sun/vddrv.h>

extern int findmod();           /* os/str_io.c */

extern struct streamtab clkinfo;

struct vdldrv vd = {
     VDMAGIC_USER,
     "clk"
  };


int
xxxinit(function_code, vdp, vdi, vds)
unsigned int function_code;
struct vddrv *vdp;
addr_t vdi;
struct vdstat *vds;
{
     register int i = 0;
     register int j;

     switch (function_code) {
        case VDLOAD:

          if (findmod("clk") >= 0) {
               log(LOG_ERR, "clk stream module already loaded\n");
               return (EADDRINUSE);
          }
 
          i = findmod("\0");

          if (i == -1 || fmodsw[i].f_name[0] != '\0') 
            return(-1);

          for (j = 0; vd.Drv_name[j] != '\0'; j++)      /* XXX check bounds */
            fmodsw[i].f_name[j] = vd.Drv_name[j];

          fmodsw[i].f_name[j] = '\0';
          fmodsw[i].f_str = &clkinfo;

          vdp->vdd_vdtab = (struct vdlinkage *)  &vd;

          return(0);

        case VDUNLOAD:
          if ((i = findmod(vd.Drv_name)) == -1)
            return(-1);

          fmodsw[i].f_name[0] = '\0';
          fmodsw[i].f_str = 0;

          return(0);
     
        case VDSTAT:
          return(0);

        default:
          return(EIO);
     }
}