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/hvm.h> 47 #include <xen/interface/event_channel.h> 48 49 static inline vm_paddr_t 50 xen_get_xenstore_mfn(void) 51 { 52 53 return (hvm_get_parameter(HVM_PARAM_STORE_PFN)); 54 } 55 56 static inline evtchn_port_t 57 xen_get_xenstore_evtchn(void) 58 { 59 60 return (hvm_get_parameter(HVM_PARAM_STORE_EVTCHN)); 61 } 62 63 static inline vm_paddr_t 64 xen_get_console_mfn(void) 65 { 66 67 return (hvm_get_parameter(HVM_PARAM_CONSOLE_PFN)); 68 } 69 70 static inline evtchn_port_t 71 xen_get_console_evtchn(void) 72 { 73 74 return (hvm_get_parameter(HVM_PARAM_CONSOLE_EVTCHN)); 75 } 76 #endif 77 78 #include <machine/xen/xen-os.h> 79 80 /* Everything below this point is not included by assembler (.S) files. */ 81 #ifndef __ASSEMBLY__ 82 83 extern shared_info_t *HYPERVISOR_shared_info; 84 85 extern int xen_disable_pv_disks; 86 extern int xen_disable_pv_nics; 87 88 extern bool xen_suspend_cancelled; 89 90 enum xen_domain_type { 91 XEN_NATIVE, /* running on bare hardware */ 92 XEN_PV_DOMAIN, /* running in a PV domain */ 93 XEN_HVM_DOMAIN, /* running in a Xen hvm domain */ 94 }; 95 96 extern enum xen_domain_type xen_domain_type; 97 98 static inline int 99 xen_domain(void) 100 { 101 return (xen_domain_type != XEN_NATIVE); 102 } 103 104 static inline int 105 xen_pv_domain(void) 106 { 107 return (xen_domain_type == XEN_PV_DOMAIN); 108 } 109 110 static inline int 111 xen_hvm_domain(void) 112 { 113 return (xen_domain_type == XEN_HVM_DOMAIN); 114 } 115 116 static inline bool 117 xen_initial_domain(void) 118 { 119 120 return (xen_domain() && (hvm_start_flags & SIF_INITDOMAIN) != 0); 121 } 122 123 /* 124 * Based on ofed/include/linux/bitops.h 125 * 126 * Those helpers are prefixed by xen_ because xen-os.h is widely included 127 * and we don't want the other drivers using them. 128 * 129 */ 130 #define NBPL (NBBY * sizeof(long)) 131 132 static inline bool 133 xen_test_bit(int bit, volatile long *addr) 134 { 135 unsigned long mask = 1UL << (bit % NBPL); 136 137 return !!(atomic_load_acq_long(&addr[bit / NBPL]) & mask); 138 } 139 140 static inline void 141 xen_set_bit(int bit, volatile long *addr) 142 { 143 atomic_set_long(&addr[bit / NBPL], 1UL << (bit % NBPL)); 144 } 145 146 static inline void 147 xen_clear_bit(int bit, volatile long *addr) 148 { 149 atomic_clear_long(&addr[bit / NBPL], 1UL << (bit % NBPL)); 150 } 151 152 #undef NBPL 153 154 /* 155 * Functions to allocate/free unused memory in order 156 * to map memory from other domains. 157 */ 158 struct resource *xenmem_alloc(device_t dev, int *res_id, size_t size); 159 int xenmem_free(device_t dev, int res_id, struct resource *res); 160 161 /* Debug/emergency function, prints directly to hypervisor console */ 162 void xc_printf(const char *, ...) __printflike(1, 2); 163 164 #ifndef xen_mb 165 #define xen_mb() mb() 166 #endif 167 #ifndef xen_rmb 168 #define xen_rmb() rmb() 169 #endif 170 #ifndef xen_wmb 171 #define xen_wmb() wmb() 172 #endif 173 174 #endif /* !__ASSEMBLY__ */ 175 176 #endif /* _XEN_XEN_OS_H_ */ 177