xen.h revision 1.44
1 /* $NetBSD: xen.h,v 1.44 2019/05/09 17:09:50 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 void xenprivcmd_init(void); 64 65 void xbdback_init(void); 66 void xennetback_init(void); 67 void xen_shm_init(void); 68 69 void xenevt_event(int); 70 void xenevt_setipending(int, int); 71 void xenevt_notify(void); 72 73 void idle_block(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 uint16_t 174 xen_atomic_cmpxchg16(volatile uint16_t *ptr, uint16_t val, uint16_t newval) 175 { 176 unsigned long result; 177 178 __asm volatile(__LOCK_PREFIX 179 "cmpxchgw %w1,%2" 180 :"=a" (result) 181 :"q"(newval), "m" (*ptr), "0" (val) 182 :"memory"); 183 184 return result; 185 } 186 187 static __inline void 188 xen_atomic_setbits_l (volatile XATOMIC_T *ptr, unsigned long bits) { 189 #ifdef __x86_64__ 190 __asm volatile("lock ; orq %1,%0" : "=m" (*ptr) : "ir" (bits)); 191 #else 192 __asm volatile("lock ; orl %1,%0" : "=m" (*ptr) : "ir" (bits)); 193 #endif 194 } 195 196 static __inline void 197 xen_atomic_clearbits_l (volatile XATOMIC_T *ptr, unsigned long bits) { 198 #ifdef __x86_64__ 199 __asm volatile("lock ; andq %1,%0" : "=m" (*ptr) : "ir" (~bits)); 200 #else 201 __asm volatile("lock ; andl %1,%0" : "=m" (*ptr) : "ir" (~bits)); 202 #endif 203 } 204 205 static __inline XATOMIC_T 206 xen_atomic_test_and_clear_bit(volatile void *ptr, unsigned long bitno) 207 { 208 long result; 209 210 __asm volatile(__LOCK_PREFIX 211 #ifdef __x86_64__ 212 "btrq %2,%1 ;" 213 "sbbq %0,%0" 214 #else 215 "btrl %2,%1 ;" 216 "sbbl %0,%0" 217 #endif 218 :"=r" (result), "=m" (*(volatile XATOMIC_T *)(ptr)) 219 :"Ir" (bitno) : "memory"); 220 return result; 221 } 222 223 static __inline XATOMIC_T 224 xen_atomic_test_and_set_bit(volatile void *ptr, unsigned long bitno) 225 { 226 long result; 227 228 __asm volatile(__LOCK_PREFIX 229 #ifdef __x86_64__ 230 "btsq %2,%1 ;" 231 "sbbq %0,%0" 232 #else 233 "btsl %2,%1 ;" 234 "sbbl %0,%0" 235 #endif 236 :"=r" (result), "=m" (*(volatile XATOMIC_T *)(ptr)) 237 :"Ir" (bitno) : "memory"); 238 return result; 239 } 240 241 static __inline int 242 xen_constant_test_bit(const volatile void *ptr, unsigned long bitno) 243 { 244 return ((1UL << (bitno & LONG_MASK)) & 245 (((const volatile XATOMIC_T *) ptr)[bitno >> LONG_SHIFT])) != 0; 246 } 247 248 static __inline XATOMIC_T 249 xen_variable_test_bit(const volatile void *ptr, unsigned long bitno) 250 { 251 long result; 252 253 __asm volatile( 254 #ifdef __x86_64__ 255 "btq %2,%1 ;" 256 "sbbq %0,%0" 257 #else 258 "btl %2,%1 ;" 259 "sbbl %0,%0" 260 #endif 261 :"=r" (result) 262 :"m" (*(const volatile XATOMIC_T *)(ptr)), "Ir" (bitno)); 263 return result; 264 } 265 266 #define xen_atomic_test_bit(ptr, bitno) \ 267 (__builtin_constant_p(bitno) ? \ 268 xen_constant_test_bit((ptr),(bitno)) : \ 269 xen_variable_test_bit((ptr),(bitno))) 270 271 static __inline void 272 xen_atomic_set_bit(volatile void *ptr, unsigned long bitno) 273 { 274 __asm volatile(__LOCK_PREFIX 275 #ifdef __x86_64__ 276 "btsq %1,%0" 277 #else 278 "btsl %1,%0" 279 #endif 280 :"=m" (*(volatile XATOMIC_T *)(ptr)) 281 :"Ir" (bitno)); 282 } 283 284 static __inline void 285 xen_atomic_clear_bit(volatile void *ptr, unsigned long bitno) 286 { 287 __asm volatile(__LOCK_PREFIX 288 #ifdef __x86_64__ 289 "btrq %1,%0" 290 #else 291 "btrl %1,%0" 292 #endif 293 :"=m" (*(volatile XATOMIC_T *)(ptr)) 294 :"Ir" (bitno)); 295 } 296 297 #undef XATOMIC_T 298 299 void wbinvd(void); 300 301 #include <xen/include/public/features.h> 302 #include <sys/systm.h> 303 304 extern bool xen_feature_tables[]; 305 void xen_init_features(void); 306 static __inline bool 307 xen_feature(int f) 308 { 309 KASSERT(f < XENFEAT_NR_SUBMAPS * 32); 310 return xen_feature_tables[f]; 311 } 312 313 #endif /* !__ASSEMBLY__ */ 314 315 #endif /* _OS_H_ */ 316
Indexes created Mon Oct 13 21:09:55 GMT 2025