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xenfunc.c revision 1.12 
      1 /*	$NetBSD: xenfunc.c,v 1.12 2011/08/13 12:09:38 cherry 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 1.12 2011/08/13 12:09:38 cherry 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_lock();
     58 	xpq_queue_invlpg(addr);
     59 	xpq_queue_unlock();
     60 	splx(s);
     61 }
     62 
     63 void
     64 lldt(u_short sel)
     65 {
     66 #ifndef __x86_64__
     67 	struct cpu_info *ci;
     68 
     69 	ci = curcpu();
     70 
     71 	if (ci->ci_curldt == sel)
     72 		return;
     73 	/* __PRINTK(("ldt %x\n", IDXSELN(sel))); */
     74 	if (sel == GSEL(GLDT_SEL, SEL_KPL))
     75 		xen_set_ldt((vaddr_t)ldt, NLDT);
     76 	else
     77 		xen_set_ldt(ci->ci_gdt[IDXSELN(sel)].ld.ld_base,
     78 		    ci->ci_gdt[IDXSELN(sel)].ld.ld_entries);
     79 	ci->ci_curldt = sel;
     80 #endif
     81 }
     82 
     83 void
     84 ltr(u_short sel)
     85 {
     86 	panic("XXX ltr not supported\n");
     87 }
     88 
     89 void
     90 lcr0(u_long val)
     91 {
     92 	panic("XXX lcr0 not supported\n");
     93 }
     94 
     95 u_long
     96 rcr0(void)
     97 {
     98 	/* XXX: handle X86_CR0_TS ? */
     99 	return 0;
    100 }
    101 
    102 #ifndef __x86_64__
    103 void
    104 lcr3(vaddr_t val)
    105 {
    106 	int s = splvm();
    107 	xpq_queue_lock();
    108 	xpq_queue_pt_switch(xpmap_ptom_masked(val));
    109 	xpq_queue_unlock();
    110 	splx(s);
    111 }
    112 #endif
    113 
    114 void
    115 tlbflush(void)
    116 {
    117 	int s = splvm();
    118 	xpq_queue_lock();
    119 	xpq_queue_tlb_flush();
    120 	xpq_queue_unlock();
    121 	splx(s);
    122 }
    123 
    124 void
    125 tlbflushg(void)
    126 {
    127 	tlbflush();
    128 }
    129 
    130 vaddr_t
    131 rdr6(void)
    132 {
    133 	u_int val;
    134 
    135 	val = HYPERVISOR_get_debugreg(6);
    136 	return val;
    137 }
    138 
    139 void
    140 ldr6(vaddr_t val)
    141 {
    142 
    143 	HYPERVISOR_set_debugreg(6, val);
    144 }
    145 
    146 void
    147 wbinvd(void)
    148 {
    149 
    150 	xpq_flush_cache();
    151 }
    152 
    153 vaddr_t
    154 rcr2(void)
    155 {
    156 	return curcpu()->ci_vcpu->arch.cr2;
    157 }
    158