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