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xenfunc.c revision 1.7.12.2 
      1 /*	$NetBSD: xenfunc.c,v 1.7.12.2 2010/10/24 22:48:22 jym 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 1.7.12.2 2010/10/24 22:48:22 jym 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 	splx(s);
     59 }
     60 
     61 void
     62 lldt(u_short sel)
     63 {
     64 #ifndef __x86_64__
     65 	struct cpu_info *ci;
     66 
     67 	ci = curcpu();
     68 
     69 	if (ci->ci_curldt == sel)
     70 		return;
     71 	/* __PRINTK(("ldt %x\n", IDXSELN(sel))); */
     72 	if (sel == GSEL(GLDT_SEL, SEL_KPL))
     73 		xen_set_ldt((vaddr_t)ldt, NLDT);
     74 	else
     75 		xen_set_ldt(ci->ci_gdt[IDXSELN(sel)].ld.ld_base,
     76 		    ci->ci_gdt[IDXSELN(sel)].ld.ld_entries);
     77 	ci->ci_curldt = sel;
     78 #endif
     79 }
     80 
     81 void
     82 ltr(u_short sel)
     83 {
     84 	__PRINTK(("XXX ltr not supported\n"));
     85 }
     86 
     87 void
     88 lcr0(u_long val)
     89 {
     90 	__PRINTK(("XXX lcr0 not supported\n"));
     91 }
     92 
     93 u_long
     94 rcr0(void)
     95 {
     96 	__PRINTK(("XXX rcr0 not supported\n"));
     97 	return 0;
     98 }
     99 
    100 #ifndef __x86_64__
    101 void
    102 lcr3(vaddr_t val)
    103 {
    104 	int s = splvm();
    105 	xpq_queue_pt_switch(xpmap_ptom_masked(val));
    106 	splx(s);
    107 }
    108 #endif
    109 
    110 void
    111 tlbflush(void)
    112 {
    113 	int s = splvm();
    114 	xpq_queue_tlb_flush();
    115 	splx(s);
    116 }
    117 
    118 void
    119 tlbflushg(void)
    120 {
    121 	tlbflush();
    122 }
    123 
    124 vaddr_t
    125 rdr6(void)
    126 {
    127 	u_int val;
    128 
    129 	val = HYPERVISOR_get_debugreg(6);
    130 	return val;
    131 }
    132 
    133 void
    134 ldr6(vaddr_t val)
    135 {
    136 
    137 	HYPERVISOR_set_debugreg(6, val);
    138 }
    139 
    140 void
    141 wbinvd(void)
    142 {
    143 
    144 	xpq_flush_cache();
    145 }
    146 
    147 vaddr_t
    148 rcr2(void)
    149 {
    150 	return curcpu()->ci_vcpu->arch.cr2;
    151 }
    152