1 /* $NetBSD: xenfunc.c,v 1.7 2008/05/11 16:23:05 ad 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Christian Limpach. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: xenfunc.c,v 1.7 2008/05/11 16:23:05 ad Exp $"); 36 37 #include <sys/param.h> 38 39 #include <uvm/uvm_extern.h> 40 41 #include <machine/intr.h> 42 #include <machine/vmparam.h> 43 #include <machine/pmap.h> 44 #include <xen/xen.h> 45 #include <xen/hypervisor.h> 46 //#include <xen/evtchn.h> 47 #include <xen/xenpmap.h> 48 #include <machine/pte.h> 49 50 #ifdef XENDEBUG_LOW 51 #define __PRINTK(x) printk x 52 #else 53 #define __PRINTK(x) 54 #endif 55 56 void xen_set_ldt(vaddr_t, uint32_t); 57 58 void 59 invlpg(vaddr_t addr) 60 { 61 int s = splvm(); 62 xpq_queue_invlpg(addr); 63 xpq_flush_queue(); 64 splx(s); 65 } 66 67 #ifndef __x86_64__ 68 void 69 lldt(u_short sel) 70 { 71 struct cpu_info *ci; 72 73 ci = curcpu(); 74 75 if (ci->ci_curldt == sel) 76 return; 77 /* __PRINTK(("ldt %x\n", IDXSELN(sel))); */ 78 if (sel == GSEL(GLDT_SEL, SEL_KPL)) 79 xen_set_ldt((vaddr_t)ldt, NLDT); 80 else 81 xen_set_ldt(ci->ci_gdt[IDXSELN(sel)].ld.ld_base, 82 ci->ci_gdt[IDXSELN(sel)].ld.ld_entries); 83 ci->ci_curldt = sel; 84 } 85 #endif 86 87 void 88 ltr(u_short sel) 89 { 90 __PRINTK(("XXX ltr not supported\n")); 91 } 92 93 void 94 lcr0(u_long val) 95 { 96 __PRINTK(("XXX lcr0 not supported\n")); 97 } 98 99 u_long 100 rcr0(void) 101 { 102 __PRINTK(("XXX rcr0 not supported\n")); 103 return 0; 104 } 105 106 #ifndef __x86_64__ 107 void 108 lcr3(vaddr_t val) 109 { 110 int s = splvm(); 111 xpq_queue_pt_switch(xpmap_ptom_masked(val)); 112 xpq_flush_queue(); 113 splx(s); 114 } 115 #endif 116 117 void 118 tlbflush(void) 119 { 120 int s = splvm(); 121 xpq_queue_tlb_flush(); 122 xpq_flush_queue(); 123 splx(s); 124 } 125 126 void 127 tlbflushg(void) 128 { 129 tlbflush(); 130 } 131 132 vaddr_t 133 rdr6(void) 134 { 135 u_int val; 136 137 val = HYPERVISOR_get_debugreg(6); 138 return val; 139 } 140 141 void 142 ldr6(vaddr_t val) 143 { 144 145 HYPERVISOR_set_debugreg(6, val); 146 } 147 148 void 149 wbinvd(void) 150 { 151 152 xpq_flush_cache(); 153 } 154 155 vaddr_t 156 rcr2(void) 157 { 158 #ifdef XEN3 159 return curcpu()->ci_vcpu->arch.cr2; 160 #else 161 return 0; 162 #endif 163 } 164