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 <machine/xen/xen-os.h> 44 45 #include <xen/interface/xen.h> 46 47 /* Everything below this point is not included by assembler (.S) files. */ 48 #ifndef __ASSEMBLY__ 49 50 extern shared_info_t *HYPERVISOR_shared_info; 51 extern start_info_t *HYPERVISOR_start_info; 52 53 /* XXX: we need to get rid of this and use HYPERVISOR_start_info directly */ 54 extern char *console_page; 55 56 extern int xen_disable_pv_disks; 57 extern int xen_disable_pv_nics; 58 59 enum xen_domain_type { 60 XEN_NATIVE, /* running on bare hardware */ 61 XEN_PV_DOMAIN, /* running in a PV domain */ 62 XEN_HVM_DOMAIN, /* running in a Xen hvm domain */ 63 }; 64 65 extern enum xen_domain_type xen_domain_type; 66 67 static inline int 68 xen_domain(void) 69 { 70 return (xen_domain_type != XEN_NATIVE); 71 } 72 73 static inline int 74 xen_pv_domain(void) 75 { 76 return (xen_domain_type == XEN_PV_DOMAIN); 77 } 78 79 static inline int 80 xen_hvm_domain(void) 81 { 82 return (xen_domain_type == XEN_HVM_DOMAIN); 83 } 84 85 static inline bool 86 xen_initial_domain(void) 87 { 88 return (xen_domain() && HYPERVISOR_start_info != NULL && 89 (HYPERVISOR_start_info->flags & SIF_INITDOMAIN) != 0); 90 } 91 92 /* 93 * Based on ofed/include/linux/bitops.h 94 * 95 * Those helpers are prefixed by xen_ because xen-os.h is widely included 96 * and we don't want the other drivers using them. 97 * 98 */ 99 #define NBPL (NBBY * sizeof(long)) 100 101 static inline bool 102 xen_test_bit(int bit, volatile long *addr) 103 { 104 unsigned long mask = 1UL << (bit % NBPL); 105 106 return !!(atomic_load_acq_long(&addr[bit / NBPL]) & mask); 107 } 108 109 static inline void 110 xen_set_bit(int bit, volatile long *addr) 111 { 112 atomic_set_long(&addr[bit / NBPL], 1UL << (bit % NBPL)); 113 } 114 115 static inline void 116 xen_clear_bit(int bit, volatile long *addr) 117 { 118 atomic_clear_long(&addr[bit / NBPL], 1UL << (bit % NBPL)); 119 } 120 121 #undef NBPL 122 123 /* 124 * Functions to allocate/free unused memory in order 125 * to map memory from other domains. 126 */ 127 struct resource *xenmem_alloc(device_t dev, int *res_id, size_t size); 128 int xenmem_free(device_t dev, int res_id, struct resource *res); 129 130 /* Debug/emergency function, prints directly to hypervisor console */ 131 void xc_printf(const char *, ...) __printflike(1, 2); 132 133 #ifndef xen_mb 134 #define xen_mb() mb() 135 #endif 136 #ifndef xen_rmb 137 #define xen_rmb() rmb() 138 #endif 139 #ifndef xen_wmb 140 #define xen_wmb() wmb() 141 #endif 142 143 #endif /* !__ASSEMBLY__ */ 144 145 #endif /* _XEN_XEN_OS_H_ */ 146