1 /****************************************************************************** 2 * xen/xen-os.h 3 * 4 * Random collection of macros and definition 5 * 6 * Copyright (c) 2003, 2004 Keir Fraser (on behalf of the Xen team) 7 * All rights reserved. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a copy 10 * of this software and associated documentation files (the "Software"), to 11 * deal in the Software without restriction, including without limitation the 12 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or 13 * sell copies of the Software, and to permit persons to whom the Software is 14 * furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included in 17 * all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 25 * DEALINGS IN THE SOFTWARE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #ifndef _XEN_XEN_OS_H_ 31 #define _XEN_XEN_OS_H_ 32 33 #if !defined(__XEN_INTERFACE_VERSION__) 34 #define __XEN_INTERFACE_VERSION__ 0x00030208 35 #endif 36 37 #define GRANT_REF_INVALID 0xffffffff 38 39 #ifdef LOCORE 40 #define __ASSEMBLY__ 41 #endif 42 43 #include <xen/interface/xen.h> 44 45 #ifndef __ASSEMBLY__ 46 #include <xen/interface/event_channel.h> 47 48 struct hypervisor_info { 49 vm_paddr_t (*get_xenstore_mfn)(void); 50 evtchn_port_t (*get_xenstore_evtchn)(void); 51 vm_paddr_t (*get_console_mfn)(void); 52 evtchn_port_t (*get_console_evtchn)(void); 53 uint32_t (*get_start_flags)(void); 54 }; 55 extern struct hypervisor_info hypervisor_info; 56 57 static inline vm_paddr_t 58 xen_get_xenstore_mfn(void) 59 { 60 61 return (hypervisor_info.get_xenstore_mfn()); 62 } 63 64 static inline evtchn_port_t 65 xen_get_xenstore_evtchn(void) 66 { 67 68 return (hypervisor_info.get_xenstore_evtchn()); 69 } 70 71 static inline vm_paddr_t 72 xen_get_console_mfn(void) 73 { 74 75 return (hypervisor_info.get_console_mfn()); 76 } 77 78 static inline evtchn_port_t 79 xen_get_console_evtchn(void) 80 { 81 82 return (hypervisor_info.get_console_evtchn()); 83 } 84 85 static inline uint32_t 86 xen_get_start_flags(void) 87 { 88 89 return (hypervisor_info.get_start_flags()); 90 } 91 #endif 92 93 #include <machine/xen/xen-os.h> 94 95 /* Everything below this point is not included by assembler (.S) files. */ 96 #ifndef __ASSEMBLY__ 97 98 extern shared_info_t *HYPERVISOR_shared_info; 99 100 extern int xen_disable_pv_disks; 101 extern int xen_disable_pv_nics; 102 103 extern bool xen_suspend_cancelled; 104 105 enum xen_domain_type { 106 XEN_NATIVE, /* running on bare hardware */ 107 XEN_PV_DOMAIN, /* running in a PV domain */ 108 XEN_HVM_DOMAIN, /* running in a Xen hvm domain */ 109 }; 110 111 extern enum xen_domain_type xen_domain_type; 112 113 static inline int 114 xen_domain(void) 115 { 116 return (xen_domain_type != XEN_NATIVE); 117 } 118 119 static inline int 120 xen_pv_domain(void) 121 { 122 return (xen_domain_type == XEN_PV_DOMAIN); 123 } 124 125 static inline int 126 xen_hvm_domain(void) 127 { 128 return (xen_domain_type == XEN_HVM_DOMAIN); 129 } 130 131 static inline bool 132 xen_initial_domain(void) 133 { 134 135 return (xen_domain() && (xen_get_start_flags() & SIF_INITDOMAIN) != 0); 136 } 137 138 /* 139 * Based on ofed/include/linux/bitops.h 140 * 141 * Those helpers are prefixed by xen_ because xen-os.h is widely included 142 * and we don't want the other drivers using them. 143 * 144 */ 145 #define NBPL (NBBY * sizeof(long)) 146 147 static inline bool 148 xen_test_bit(int bit, volatile long *addr) 149 { 150 unsigned long mask = 1UL << (bit % NBPL); 151 152 return !!(atomic_load_acq_long(&addr[bit / NBPL]) & mask); 153 } 154 155 static inline void 156 xen_set_bit(int bit, volatile long *addr) 157 { 158 atomic_set_long(&addr[bit / NBPL], 1UL << (bit % NBPL)); 159 } 160 161 static inline void 162 xen_clear_bit(int bit, volatile long *addr) 163 { 164 atomic_clear_long(&addr[bit / NBPL], 1UL << (bit % NBPL)); 165 } 166 167 #undef NBPL 168 169 /* 170 * Functions to allocate/free unused memory in order 171 * to map memory from other domains. 172 */ 173 struct resource *xenmem_alloc(device_t dev, int *res_id, size_t size); 174 int xenmem_free(device_t dev, int res_id, struct resource *res); 175 176 /* Debug/emergency function, prints directly to hypervisor console */ 177 void xc_printf(const char *, ...) __printflike(1, 2); 178 179 #ifndef xen_mb 180 #define xen_mb() mb() 181 #endif 182 #ifndef xen_rmb 183 #define xen_rmb() rmb() 184 #endif 185 #ifndef xen_wmb 186 #define xen_wmb() wmb() 187 #endif 188 189 #endif /* !__ASSEMBLY__ */ 190 191 #endif /* _XEN_XEN_OS_H_ */ 192