sys/platform/vkernel64/platform/globaldata.c

   1 /*
   2  * Copyright (c) 2006 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sys/platform/vkernel/platform/globaldata.c,v 1.5 2008/04/28 07:05:08 dillon Exp $
  35  */
  36
  37 #include <sys/types.h>
  38 #include <sys/systm.h>
  39 #include <sys/stat.h>
  40 #include <sys/mman.h>
  41 #include <sys/tls.h>
  42 #include <sys/proc.h>
  43 #include <vm/vm_page.h>
  44
  45 #include <machine/md_var.h>
  46 #include <machine/globaldata.h>
  47 #include <machine/vmparam.h>
  48
  49 #include <stdio.h>
  50 #include <stdlib.h>
  51 #include <unistd.h>
  52 #include <fcntl.h>
  53 #include <string.h>
  54 #include <err.h>
  55 #include <errno.h>
  56 #include <assert.h>
  57
  58 struct globaldata *
  59 globaldata_find(int cpu)
  60 {
  61         KKASSERT(cpu >= 0 && cpu < ncpus);
  62         return (&CPU_prvspace[cpu].mdglobaldata.mi);
  63 }
  64
  65 void
  66 cpu_gdinit(struct mdglobaldata *gd, int cpu)
  67 {
  68         if (cpu)
  69                 gd->mi.gd_curthread = &gd->mi.gd_idlethread;
  70
  71         lwkt_init_thread(&gd->mi.gd_idlethread,
  72                         gd->mi.gd_prvspace->idlestack,
  73                         sizeof(gd->mi.gd_prvspace->idlestack),
  74                         0, &gd->mi);
  75         lwkt_set_comm(&gd->mi.gd_idlethread, "idle_%d", cpu);
  76         gd->mi.gd_idlethread.td_switch = cpu_lwkt_switch;
  77         gd->mi.gd_idlethread.td_sp -= sizeof(void *);
  78         *(void **)gd->mi.gd_idlethread.td_sp = cpu_idle_restore;
  79 }
  80
  81 int
  82 is_globaldata_space(vm_offset_t saddr, vm_offset_t eaddr)
  83 {
  84         if (saddr >= (vm_offset_t)&CPU_prvspace[0] &&
  85             eaddr <= (vm_offset_t)&CPU_prvspace[MAXCPU]) {
  86                 return (TRUE);
  87         }
  88         return (FALSE);
  89 }