Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux...
[linux-2.6] / arch / ia64 / include / asm / paravirt_patch.h
1 /******************************************************************************
2  * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
3  *                    VA Linux Systems Japan K.K.
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18  *
19  */
20
21 #ifndef __ASM_PARAVIRT_PATCH_H
22 #define __ASM_PARAVIRT_PATCH_H
23
24 #ifdef __ASSEMBLY__
25
26         .section .paravirt_branches, "a"
27         .previous
28 #define PARAVIRT_PATCH_SITE_BR(type)            \
29         {                                       \
30         [1:] ;                                  \
31         br.cond.sptk.many 2f ;                  \
32         nop.b 0 ;                               \
33         nop.b 0;; ;                             \
34         } ;                                     \
35         2:                                      \
36         .xdata8 ".paravirt_branches", 1b, type
37
38 #else
39
40 #include <linux/stringify.h>
41 #include <asm/intrinsics.h>
42
43 /* for binary patch */
44 struct paravirt_patch_site_bundle {
45         void            *sbundle;
46         void            *ebundle;
47         unsigned long   type;
48 };
49
50 /* label means the beginning of new bundle */
51 #define paravirt_alt_bundle(instr, privop)                              \
52         "\t998:\n"                                                      \
53         "\t" instr "\n"                                                 \
54         "\t999:\n"                                                      \
55         "\t.pushsection .paravirt_bundles, \"a\"\n"                     \
56         "\t.popsection\n"                                               \
57         "\t.xdata8 \".paravirt_bundles\", 998b, 999b, "                 \
58         __stringify(privop) "\n"
59
60
61 struct paravirt_patch_bundle_elem {
62         const void      *sbundle;
63         const void      *ebundle;
64         unsigned long   type;
65 };
66
67
68 struct paravirt_patch_site_inst {
69         unsigned long   stag;
70         unsigned long   etag;
71         unsigned long   type;
72 };
73
74 #define paravirt_alt_inst(instr, privop)                                \
75         "\t[998:]\n"                                                    \
76         "\t" instr "\n"                                                 \
77         "\t[999:]\n"                                                    \
78         "\t.pushsection .paravirt_insts, \"a\"\n"                       \
79         "\t.popsection\n"                                               \
80         "\t.xdata8 \".paravirt_insts\", 998b, 999b, "                   \
81         __stringify(privop) "\n"
82
83 struct paravirt_patch_site_branch {
84         unsigned long   tag;
85         unsigned long   type;
86 };
87
88 struct paravirt_patch_branch_target {
89         const void      *entry;
90         unsigned long   type;
91 };
92
93 void
94 __paravirt_patch_apply_branch(
95         unsigned long tag, unsigned long type,
96         const struct paravirt_patch_branch_target *entries,
97         unsigned int nr_entries);
98
99 void
100 paravirt_patch_reloc_br(unsigned long tag, const void *target);
101
102 void
103 paravirt_patch_reloc_brl(unsigned long tag, const void *target);
104
105
106 #if defined(ASM_SUPPORTED) && defined(CONFIG_PARAVIRT)
107 unsigned long
108 ia64_native_patch_bundle(void *sbundle, void *ebundle, unsigned long type);
109
110 unsigned long
111 __paravirt_patch_apply_bundle(void *sbundle, void *ebundle, unsigned long type,
112                               const struct paravirt_patch_bundle_elem *elems,
113                               unsigned long nelems,
114                               const struct paravirt_patch_bundle_elem **found);
115
116 void
117 paravirt_patch_apply_bundle(const struct paravirt_patch_site_bundle *start,
118                             const struct paravirt_patch_site_bundle *end);
119
120 void
121 paravirt_patch_apply_inst(const struct paravirt_patch_site_inst *start,
122                           const struct paravirt_patch_site_inst *end);
123
124 void paravirt_patch_apply(void);
125 #else
126 #define paravirt_patch_apply_bundle(start, end) do { } while (0)
127 #define paravirt_patch_apply_inst(start, end)   do { } while (0)
128 #define paravirt_patch_apply()                  do { } while (0)
129 #endif
130
131 #endif /* !__ASSEMBLEY__ */
132
133 #endif /* __ASM_PARAVIRT_PATCH_H */
134
135 /*
136  * Local variables:
137  * mode: C
138  * c-set-style: "linux"
139  * c-basic-offset: 8
140  * tab-width: 8
141  * indent-tabs-mode: t
142  * End:
143  */