1 /* $NetBSD: xen.h,v 1.48 2023/03/24 12:28:42 bouyer Exp $ */ 2 3 /* 4 * 5 * Copyright (c) 2003, 2004 Keir Fraser (on behalf of the Xen team) 6 * All rights reserved. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a copy 9 * of this software and associated documentation files (the "Software"), to 10 * deal in the Software without restriction, including without limitation the 11 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 12 * sell copies of the Software, and to permit persons to whom the Software is 13 * furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included in 16 * all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 24 * DEALINGS IN THE SOFTWARE. 25 */ 26 27 28 #ifndef _XEN_H 29 #define _XEN_H 30 31 #ifdef _KERNEL_OPT 32 #include "opt_xen.h" 33 #endif 34 35 36 #ifndef _LOCORE 37 38 #include <machine/cpufunc.h> 39 40 struct xen_netinfo { 41 uint32_t xi_ifno; 42 char *xi_root; 43 uint32_t xi_ip[5]; 44 }; 45 46 union xen_cmdline_parseinfo { 47 char xcp_bootdev[144]; 48 struct xen_netinfo xcp_netinfo; 49 char xcp_console[16]; 50 char xcp_pcidevs[64]; 51 }; 52 53 #define XEN_PARSE_BOOTDEV 0 54 #define XEN_PARSE_NETINFO 1 55 #define XEN_PARSE_CONSOLE 2 56 #define XEN_PARSE_BOOTFLAGS 3 57 #define XEN_PARSE_PCIBACK 4 58 59 void xen_parse_cmdline(int, union xen_cmdline_parseinfo *); 60 61 void xenconscn_attach(void); 62 63 int xen_pvh_consinit(void); 64 65 void xenprivcmd_init(void); 66 67 void xbdback_init(void); 68 void xennetback_init(void); 69 void xen_shm_init(void); 70 71 void xenevt_event(int); 72 void xenevt_setipending(int, int); 73 void xenevt_notify(void); 74 75 /* xen_machdep.c */ 76 void sysctl_xen_suspend_setup(void); 77 78 #include <sys/stdarg.h> 79 void printk(const char *, ...); 80 81 #endif 82 83 #endif /* _XEN_H */ 84 85 /****************************************************************************** 86 * os.h 87 * 88 * random collection of macros and definition 89 */ 90 91 #ifndef _OS_H_ 92 #define _OS_H_ 93 94 /* 95 * These are the segment descriptors provided for us by the hypervisor. 96 * For now, these are hardwired -- guest OSes cannot update the GDT 97 * or LDT. 98 * 99 * It shouldn't be hard to support descriptor-table frobbing -- let me 100 * know if the BSD or XP ports require flexibility here. 101 */ 102 103 104 /* 105 * these are also defined in xen-public/xen.h but can't be pulled in as 106 * they are used in start of day assembly. Need to clean up the .h files 107 * a bit more... 108 */ 109 110 #ifndef FLAT_RING1_CS 111 #define FLAT_RING1_CS 0xe019 /* GDT index 259 */ 112 #define FLAT_RING1_DS 0xe021 /* GDT index 260 */ 113 #define FLAT_RING1_SS 0xe021 /* GDT index 260 */ 114 #define FLAT_RING3_CS 0xe02b /* GDT index 261 */ 115 #define FLAT_RING3_DS 0xe033 /* GDT index 262 */ 116 #define FLAT_RING3_SS 0xe033 /* GDT index 262 */ 117 #endif 118 119 #define __KERNEL_CS FLAT_RING1_CS 120 #define __KERNEL_DS FLAT_RING1_DS 121 122 /* Everything below this point is not included by assembler (.S) files. */ 123 #ifndef _LOCORE 124 125 /* Version Specific Glue */ 126 #if __XEN_INTERFACE_VERSION__ >= 0x00030203 127 #define console_mfn console.domU.mfn 128 #define console_evtchn console.domU.evtchn 129 #endif 130 131 /* some function prototypes */ 132 void trap_init(void); 133 void xpq_flush_cache(void); 134 135 #define xendomain_is_dom0() (xen_start_info.flags & SIF_INITDOMAIN) 136 #define xendomain_is_privileged() (xen_start_info.flags & SIF_PRIVILEGED) 137 138 /* 139 * always assume we're on multiprocessor. We don't know how many CPU the 140 * underlying hardware has. 141 */ 142 #define __LOCK_PREFIX "lock; " 143 144 #define XATOMIC_T u_long 145 #ifdef __x86_64__ 146 #define LONG_SHIFT 6 147 #define LONG_MASK 63 148 #else /* __x86_64__ */ 149 #define LONG_SHIFT 5 150 #define LONG_MASK 31 151 #endif /* __x86_64__ */ 152 153 #define xen_ffs __builtin_ffsl 154 155 static __inline XATOMIC_T 156 xen_atomic_xchg(volatile XATOMIC_T *ptr, unsigned long val) 157 { 158 unsigned long result; 159 160 __asm volatile(__LOCK_PREFIX 161 #ifdef __x86_64__ 162 "xchgq %0,%1" 163 #else 164 "xchgl %0,%1" 165 #endif 166 :"=r" (result) 167 :"m" (*ptr), "0" (val) 168 :"memory"); 169 170 return result; 171 } 172 173 static __inline void 174 xen_atomic_setbits_l (volatile XATOMIC_T *ptr, unsigned long bits) { 175 #ifdef __x86_64__ 176 __asm volatile("lock ; orq %1,%0" : "=m" (*ptr) : "ir" (bits)); 177 #else 178 __asm volatile("lock ; orl %1,%0" : "=m" (*ptr) : "ir" (bits)); 179 #endif 180 } 181 182 static __inline void 183 xen_atomic_clearbits_l (volatile XATOMIC_T *ptr, unsigned long bits) { 184 #ifdef __x86_64__ 185 __asm volatile("lock ; andq %1,%0" : "=m" (*ptr) : "ir" (~bits)); 186 #else 187 __asm volatile("lock ; andl %1,%0" : "=m" (*ptr) : "ir" (~bits)); 188 #endif 189 } 190 191 static __inline XATOMIC_T 192 xen_atomic_test_and_clear_bit(volatile void *ptr, unsigned long bitno) 193 { 194 long result; 195 196 __asm volatile(__LOCK_PREFIX 197 #ifdef __x86_64__ 198 "btrq %2,%1 ;" 199 "sbbq %0,%0" 200 #else 201 "btrl %2,%1 ;" 202 "sbbl %0,%0" 203 #endif 204 :"=r" (result), "=m" (*(volatile XATOMIC_T *)(ptr)) 205 :"Ir" (bitno) : "memory"); 206 return result; 207 } 208 209 static __inline XATOMIC_T 210 xen_atomic_test_and_set_bit(volatile void *ptr, unsigned long bitno) 211 { 212 long result; 213 214 __asm volatile(__LOCK_PREFIX 215 #ifdef __x86_64__ 216 "btsq %2,%1 ;" 217 "sbbq %0,%0" 218 #else 219 "btsl %2,%1 ;" 220 "sbbl %0,%0" 221 #endif 222 :"=r" (result), "=m" (*(volatile XATOMIC_T *)(ptr)) 223 :"Ir" (bitno) : "memory"); 224 return result; 225 } 226 227 static __inline int 228 xen_constant_test_bit(const volatile void *ptr, unsigned long bitno) 229 { 230 return ((1UL << (bitno & LONG_MASK)) & 231 (((const volatile XATOMIC_T *) ptr)[bitno >> LONG_SHIFT])) != 0; 232 } 233 234 static __inline XATOMIC_T 235 xen_variable_test_bit(const volatile void *ptr, unsigned long bitno) 236 { 237 long result; 238 239 __asm volatile( 240 #ifdef __x86_64__ 241 "btq %2,%1 ;" 242 "sbbq %0,%0" 243 #else 244 "btl %2,%1 ;" 245 "sbbl %0,%0" 246 #endif 247 :"=r" (result) 248 :"m" (*(const volatile XATOMIC_T *)(ptr)), "Ir" (bitno)); 249 return result; 250 } 251 252 #define xen_atomic_test_bit(ptr, bitno) \ 253 (__builtin_constant_p(bitno) ? \ 254 xen_constant_test_bit((ptr),(bitno)) : \ 255 xen_variable_test_bit((ptr),(bitno))) 256 257 static __inline void 258 xen_atomic_set_bit(volatile void *ptr, unsigned long bitno) 259 { 260 __asm volatile(__LOCK_PREFIX 261 #ifdef __x86_64__ 262 "btsq %1,%0" 263 #else 264 "btsl %1,%0" 265 #endif 266 :"=m" (*(volatile XATOMIC_T *)(ptr)) 267 :"Ir" (bitno)); 268 } 269 270 static __inline void 271 xen_atomic_clear_bit(volatile void *ptr, unsigned long bitno) 272 { 273 __asm volatile(__LOCK_PREFIX 274 #ifdef __x86_64__ 275 "btrq %1,%0" 276 #else 277 "btrl %1,%0" 278 #endif 279 :"=m" (*(volatile XATOMIC_T *)(ptr)) 280 :"Ir" (bitno)); 281 } 282 283 #undef XATOMIC_T 284 285 void wbinvd(void); 286 287 #include <xen/include/public/features.h> 288 #include <sys/systm.h> 289 290 extern bool xen_feature_tables[]; 291 void xen_init_features(void); 292 static __inline bool 293 xen_feature(int f) 294 { 295 KASSERT(f < XENFEAT_NR_SUBMAPS * 32); 296 return xen_feature_tables[f]; 297 } 298 299 void xen_bootconf(void); 300 301 #endif /* !__ASSEMBLY__ */ 302 303 #endif /* _OS_H_ */ 304
Indexes created Sun Sep 21 20:09:37 GMT 2025