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 48struct 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}; 55extern struct hypervisor_info hypervisor_info; 56 57static inline vm_paddr_t 58xen_get_xenstore_mfn(void) 59{ 60 61 return (hypervisor_info.get_xenstore_mfn()); 62} 63 64static inline evtchn_port_t 65xen_get_xenstore_evtchn(void) 66{ 67 68 return (hypervisor_info.get_xenstore_evtchn()); 69} 70 71static inline vm_paddr_t 72xen_get_console_mfn(void) 73{ 74 75 return (hypervisor_info.get_console_mfn()); 76} 77 78static inline evtchn_port_t 79xen_get_console_evtchn(void) 80{ 81 82 return (hypervisor_info.get_console_evtchn()); 83} 84 85static inline uint32_t 86xen_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 98extern shared_info_t *HYPERVISOR_shared_info; 99 100extern int xen_disable_pv_disks; 101extern int xen_disable_pv_nics; 102 103extern bool xen_suspend_cancelled; 104 105enum 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 111extern enum xen_domain_type xen_domain_type; 112 113static inline int 114xen_domain(void) 115{ 116 return (xen_domain_type != XEN_NATIVE); 117} 118 119static inline int 120xen_pv_domain(void) 121{ 122 return (xen_domain_type == XEN_PV_DOMAIN); 123} 124 125static inline int 126xen_hvm_domain(void) 127{ 128 return (xen_domain_type == XEN_HVM_DOMAIN); 129} 130 131static inline bool 132xen_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 147static inline bool 148xen_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 155static inline void 156xen_set_bit(int bit, volatile long *addr) 157{ 158 atomic_set_long(&addr[bit / NBPL], 1UL << (bit % NBPL)); 159} 160 161static inline void 162xen_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 */ 173struct resource *xenmem_alloc(device_t dev, int *res_id, size_t size); 174int xenmem_free(device_t dev, int res_id, struct resource *res); 175 176/* Debug/emergency function, prints directly to hypervisor console */ 177void 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