sys/arch/xen/x86/xenfunc.c

   1 /*      $NetBSD: xenfunc.c,v 1.8 2009/07/29 12:02:08 cegger Exp $       */
   2
   3 /*
   4  *
   5  * Copyright (c) 2004 Christian Limpach.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  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 the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __KERNEL_RCSID(0, "$NetBSD: xenfunc.c,v 1.8 2009/07/29 12:02:08 cegger Exp $");
  31
  32 #include <sys/param.h>
  33
  34 #include <uvm/uvm_extern.h>
  35
  36 #include <machine/intr.h>
  37 #include <machine/vmparam.h>
  38 #include <machine/pmap.h>
  39 #include <xen/xen.h>
  40 #include <xen/hypervisor.h>
  41 //#include <xen/evtchn.h>
  42 #include <xen/xenpmap.h>
  43 #include <machine/pte.h>
  44
  45 #ifdef XENDEBUG_LOW
  46 #define __PRINTK(x) printk x
  47 #else
  48 #define __PRINTK(x)
  49 #endif
  50
  51 void xen_set_ldt(vaddr_t, uint32_t);
  52
  53 void
  54 invlpg(vaddr_t addr)
  55 {
  56         int s = splvm();
  57         xpq_queue_invlpg(addr);
  58         xpq_flush_queue();
  59         splx(s);
  60 }
  61
  62 #ifndef __x86_64__
  63 void
  64 lldt(u_short sel)
  65 {
  66         struct cpu_info *ci;
  67
  68         ci = curcpu();
  69
  70         if (ci->ci_curldt == sel)
  71                 return;
  72         /* __PRINTK(("ldt %x\n", IDXSELN(sel))); */
  73         if (sel == GSEL(GLDT_SEL, SEL_KPL))
  74                 xen_set_ldt((vaddr_t)ldt, NLDT);
  75         else
  76                 xen_set_ldt(ci->ci_gdt[IDXSELN(sel)].ld.ld_base,
  77                     ci->ci_gdt[IDXSELN(sel)].ld.ld_entries);
  78         ci->ci_curldt = sel;
  79 }
  80 #endif
  81
  82 void
  83 ltr(u_short sel)
  84 {
  85         __PRINTK(("XXX ltr not supported\n"));
  86 }
  87
  88 void
  89 lcr0(u_long val)
  90 {
  91         __PRINTK(("XXX lcr0 not supported\n"));
  92 }
  93
  94 u_long
  95 rcr0(void)
  96 {
  97         __PRINTK(("XXX rcr0 not supported\n"));
  98         return 0;
  99 }
 100
 101 #ifndef __x86_64__
 102 void
 103 lcr3(vaddr_t val)
 104 {
 105         int s = splvm();
 106         xpq_queue_pt_switch(xpmap_ptom_masked(val));
 107         xpq_flush_queue();
 108         splx(s);
 109 }
 110 #endif
 111
 112 void
 113 tlbflush(void)
 114 {
 115         int s = splvm();
 116         xpq_queue_tlb_flush();
 117         xpq_flush_queue();
 118         splx(s);
 119 }
 120
 121 void
 122 tlbflushg(void)
 123 {
 124         tlbflush();
 125 }
 126
 127 vaddr_t
 128 rdr6(void)
 129 {
 130         u_int val;
 131
 132         val = HYPERVISOR_get_debugreg(6);
 133         return val;
 134 }
 135
 136 void
 137 ldr6(vaddr_t val)
 138 {
 139
 140         HYPERVISOR_set_debugreg(6, val);
 141 }
 142
 143 void
 144 wbinvd(void)
 145 {
 146
 147         xpq_flush_cache();
 148 }
 149
 150 vaddr_t
 151 rcr2(void)
 152 {
 153         return curcpu()->ci_vcpu->arch.cr2;
 154 }