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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1#ifndef __ASM_POWERPC_FEATURE_FIXUPS_H
2#define __ASM_POWERPC_FEATURE_FIXUPS_H
3
4/*
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.
9 */
10
11/*
12 * Feature section common macros
13 *
14 * Note that the entries now contain offsets between the table entry
15 * and the code rather than absolute code pointers in order to be
16 * useable with the vdso shared library. There is also an assumption
17 * that values will be negative, that is, the fixup table has to be
18 * located after the code it fixes up.
19 */
20#if defined(CONFIG_PPC64) && !defined(__powerpc64__)
21/* 64 bits kernel, 32 bits code (ie. vdso32) */
22#define FTR_ENTRY_LONG .8byte
23#define FTR_ENTRY_OFFSET .long 0xffffffff; .long
24#elif defined(CONFIG_PPC64)
25#define FTR_ENTRY_LONG .8byte
26#define FTR_ENTRY_OFFSET .8byte
27#else
28#define FTR_ENTRY_LONG .long
29#define FTR_ENTRY_OFFSET .long
30#endif
31
32#define START_FTR_SECTION(label) label##1:
33
34#define FTR_SECTION_ELSE_NESTED(label) \
35label##2: \
36 .pushsection __ftr_alt_##label,"a"; \
37 .align 2; \
38label##3:
39
40#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect) \
41label##4: \
42 .popsection; \
43 .pushsection sect,"a"; \
44 .align 3; \
45label##5: \
46 FTR_ENTRY_LONG msk; \
47 FTR_ENTRY_LONG val; \
48 FTR_ENTRY_OFFSET label##1b-label##5b; \
49 FTR_ENTRY_OFFSET label##2b-label##5b; \
50 FTR_ENTRY_OFFSET label##3b-label##5b; \
51 FTR_ENTRY_OFFSET label##4b-label##5b; \
52 .ifgt (label##4b- label##3b)-(label##2b- label##1b); \
53 .error "Feature section else case larger than body"; \
54 .endif; \
55 .popsection;
56
57
58/* CPU feature dependent sections */
59#define BEGIN_FTR_SECTION_NESTED(label) START_FTR_SECTION(label)
60#define BEGIN_FTR_SECTION START_FTR_SECTION(97)
61
62#define END_FTR_SECTION_NESTED(msk, val, label) \
63 FTR_SECTION_ELSE_NESTED(label) \
64 MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)
65
66#define END_FTR_SECTION(msk, val) \
67 END_FTR_SECTION_NESTED(msk, val, 97)
68
69#define END_FTR_SECTION_NESTED_IFSET(msk, label) \
70 END_FTR_SECTION_NESTED((msk), (msk), label)
71
72#define END_FTR_SECTION_IFSET(msk) END_FTR_SECTION((msk), (msk))
73#define END_FTR_SECTION_IFCLR(msk) END_FTR_SECTION((msk), 0)
74
75/* CPU feature sections with alternatives, use BEGIN_FTR_SECTION to start */
76#define FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97)
77#define ALT_FTR_SECTION_END_NESTED(msk, val, label) \
78 MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup)
79#define ALT_FTR_SECTION_END_NESTED_IFSET(msk, label) \
80 ALT_FTR_SECTION_END_NESTED(msk, msk, label)
81#define ALT_FTR_SECTION_END_NESTED_IFCLR(msk, label) \
82 ALT_FTR_SECTION_END_NESTED(msk, 0, label)
83#define ALT_FTR_SECTION_END(msk, val) \
84 ALT_FTR_SECTION_END_NESTED(msk, val, 97)
85#define ALT_FTR_SECTION_END_IFSET(msk) \
86 ALT_FTR_SECTION_END_NESTED_IFSET(msk, 97)
87#define ALT_FTR_SECTION_END_IFCLR(msk) \
88 ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
89
90/* MMU feature dependent sections */
91#define BEGIN_MMU_FTR_SECTION_NESTED(label) START_FTR_SECTION(label)
92#define BEGIN_MMU_FTR_SECTION START_FTR_SECTION(97)
93
94#define END_MMU_FTR_SECTION_NESTED(msk, val, label) \
95 FTR_SECTION_ELSE_NESTED(label) \
96 MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup)
97
98#define END_MMU_FTR_SECTION(msk, val) \
99 END_MMU_FTR_SECTION_NESTED(msk, val, 97)
100
101#define END_MMU_FTR_SECTION_IFSET(msk) END_MMU_FTR_SECTION((msk), (msk))
102#define END_MMU_FTR_SECTION_IFCLR(msk) END_MMU_FTR_SECTION((msk), 0)
103
104/* MMU feature sections with alternatives, use BEGIN_FTR_SECTION to start */
105#define MMU_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label)
106#define MMU_FTR_SECTION_ELSE MMU_FTR_SECTION_ELSE_NESTED(97)
107#define ALT_MMU_FTR_SECTION_END_NESTED(msk, val, label) \
108 MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup)
109#define ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, label) \
110 ALT_MMU_FTR_SECTION_END_NESTED(msk, msk, label)
111#define ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, label) \
112 ALT_MMU_FTR_SECTION_END_NESTED(msk, 0, label)
113#define ALT_MMU_FTR_SECTION_END(msk, val) \
114 ALT_MMU_FTR_SECTION_END_NESTED(msk, val, 97)
115#define ALT_MMU_FTR_SECTION_END_IFSET(msk) \
116 ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, 97)
117#define ALT_MMU_FTR_SECTION_END_IFCLR(msk) \
118 ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
119
120/* Firmware feature dependent sections */
121#define BEGIN_FW_FTR_SECTION_NESTED(label) START_FTR_SECTION(label)
122#define BEGIN_FW_FTR_SECTION START_FTR_SECTION(97)
123
124#define END_FW_FTR_SECTION_NESTED(msk, val, label) \
125 FTR_SECTION_ELSE_NESTED(label) \
126 MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)
127
128#define END_FW_FTR_SECTION(msk, val) \
129 END_FW_FTR_SECTION_NESTED(msk, val, 97)
130
131#define END_FW_FTR_SECTION_IFSET(msk) END_FW_FTR_SECTION((msk), (msk))
132#define END_FW_FTR_SECTION_IFCLR(msk) END_FW_FTR_SECTION((msk), 0)
133
134/* Firmware feature sections with alternatives */
135#define FW_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label)
136#define FW_FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97)
137#define ALT_FW_FTR_SECTION_END_NESTED(msk, val, label) \
138 MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup)
139#define ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, label) \
140 ALT_FW_FTR_SECTION_END_NESTED(msk, msk, label)
141#define ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, label) \
142 ALT_FW_FTR_SECTION_END_NESTED(msk, 0, label)
143#define ALT_FW_FTR_SECTION_END(msk, val) \
144 ALT_FW_FTR_SECTION_END_NESTED(msk, val, 97)
145#define ALT_FW_FTR_SECTION_END_IFSET(msk) \
146 ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, 97)
147#define ALT_FW_FTR_SECTION_END_IFCLR(msk) \
148 ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97)
149
150#ifndef __ASSEMBLY__
151
152#define ASM_FTR_IF(section_if, section_else, msk, val) \
153 stringify_in_c(BEGIN_FTR_SECTION) \
154 section_if "; " \
155 stringify_in_c(FTR_SECTION_ELSE) \
156 section_else "; " \
157 stringify_in_c(ALT_FTR_SECTION_END((msk), (val)))
158
159#define ASM_FTR_IFSET(section_if, section_else, msk) \
160 ASM_FTR_IF(section_if, section_else, (msk), (msk))
161
162#define ASM_FTR_IFCLR(section_if, section_else, msk) \
163 ASM_FTR_IF(section_if, section_else, (msk), 0)
164
165#define ASM_MMU_FTR_IF(section_if, section_else, msk, val) \
166 stringify_in_c(BEGIN_MMU_FTR_SECTION) \
167 section_if "; " \
168 stringify_in_c(MMU_FTR_SECTION_ELSE) \
169 section_else "; " \
170 stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val)))
171
172#define ASM_MMU_FTR_IFSET(section_if, section_else, msk) \
173 ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk))
174
175#define ASM_MMU_FTR_IFCLR(section_if, section_else, msk) \
176 ASM_MMU_FTR_IF(section_if, section_else, (msk), 0)
177
178#endif /* __ASSEMBLY__ */
179
180/* LWSYNC feature sections */
181#define START_LWSYNC_SECTION(label) label##1:
182#define MAKE_LWSYNC_SECTION_ENTRY(label, sect) \
183label##2: \
184 .pushsection sect,"a"; \
185 .align 2; \
186label##3: \
187 FTR_ENTRY_OFFSET label##1b-label##3b; \
188 .popsection;
189
190#ifndef __ASSEMBLY__
191void apply_feature_fixups(void);
192void setup_feature_keys(void);
193#endif
194
195#endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */