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