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c5157e58 ME |
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 | ||
c5157e58 ME |
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 | */ | |
c1137c37 | 20 | #if defined(CONFIG_PPC64) && !defined(__powerpc64__) |
c5157e58 | 21 | /* 64 bits kernel, 32 bits code (ie. vdso32) */ |
c1137c37 ME |
22 | #define FTR_ENTRY_LONG .llong |
23 | #define FTR_ENTRY_OFFSET .long 0xffffffff; .long | |
af20aeb1 MM |
24 | #elif defined(CONFIG_PPC64) |
25 | #define FTR_ENTRY_LONG .llong | |
26 | #define FTR_ENTRY_OFFSET .llong | |
c1137c37 | 27 | #else |
af20aeb1 MM |
28 | #define FTR_ENTRY_LONG .long |
29 | #define FTR_ENTRY_OFFSET .long | |
c1137c37 ME |
30 | #endif |
31 | ||
fac23fe4 ME |
32 | #define START_FTR_SECTION(label) label##1: |
33 | ||
34 | #define FTR_SECTION_ELSE_NESTED(label) \ | |
35 | label##2: \ | |
36 | .pushsection __ftr_alt_##label,"a"; \ | |
37 | .align 2; \ | |
38 | label##3: | |
39 | ||
c0337288 ME |
40 | #define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect) \ |
41 | label##4: \ | |
42 | .popsection; \ | |
43 | .pushsection sect,"a"; \ | |
44 | .align 3; \ | |
45 | label##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; \ | |
b3e6b5df | 52 | .ifgt (label##4b- label##3b)-(label##2b- label##1b); \ |
c0337288 ME |
53 | .error "Feature section else case larger than body"; \ |
54 | .endif; \ | |
fac23fe4 | 55 | .popsection; |
c5157e58 ME |
56 | |
57 | ||
58 | /* CPU feature dependent sections */ | |
fac23fe4 ME |
59 | #define BEGIN_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) |
60 | #define BEGIN_FTR_SECTION START_FTR_SECTION(97) | |
c5157e58 | 61 | |
fac23fe4 ME |
62 | #define END_FTR_SECTION_NESTED(msk, val, label) \ |
63 | FTR_SECTION_ELSE_NESTED(label) \ | |
c5157e58 ME |
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 | ||
9cba253d NP |
69 | #define END_FTR_SECTION_NESTED_IFSET(msk, label) \ |
70 | END_FTR_SECTION_NESTED((msk), (msk), label) | |
71 | ||
c5157e58 ME |
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 | ||
fac23fe4 ME |
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) | |
c5157e58 | 89 | |
7c03d653 BH |
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 | ||
c5157e58 | 120 | /* Firmware feature dependent sections */ |
fac23fe4 ME |
121 | #define BEGIN_FW_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) |
122 | #define BEGIN_FW_FTR_SECTION START_FTR_SECTION(97) | |
c5157e58 | 123 | |
fac23fe4 ME |
124 | #define END_FW_FTR_SECTION_NESTED(msk, val, label) \ |
125 | FTR_SECTION_ELSE_NESTED(label) \ | |
c5157e58 ME |
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 | ||
fac23fe4 ME |
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 | ||
af20aeb1 MM |
150 | #ifndef __ASSEMBLY__ |
151 | ||
a32e252f MN |
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 | ||
af20aeb1 MM |
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 | ||
c5157e58 ME |
178 | #endif /* __ASSEMBLY__ */ |
179 | ||
2d1b2027 KG |
180 | /* LWSYNC feature sections */ |
181 | #define START_LWSYNC_SECTION(label) label##1: | |
182 | #define MAKE_LWSYNC_SECTION_ENTRY(label, sect) \ | |
183 | label##2: \ | |
184 | .pushsection sect,"a"; \ | |
185 | .align 2; \ | |
186 | label##3: \ | |
3d98ffbf | 187 | FTR_ENTRY_OFFSET label##1b-label##3b; \ |
2d1b2027 KG |
188 | .popsection; |
189 | ||
ad7b3c45 AM |
190 | #define RFI_FLUSH_FIXUP_SECTION \ |
191 | 951: \ | |
192 | .pushsection __rfi_flush_fixup,"a"; \ | |
193 | .align 2; \ | |
194 | 952: \ | |
195 | FTR_ENTRY_OFFSET 951b-952b; \ | |
196 | .popsection; | |
197 | ||
198 | ||
9402c684 | 199 | #ifndef __ASSEMBLY__ |
ad7b3c45 AM |
200 | #include <linux/types.h> |
201 | ||
202 | extern long __start___rfi_flush_fixup, __stop___rfi_flush_fixup; | |
ad7b3c45 | 203 | |
9402c684 | 204 | void apply_feature_fixups(void); |
97f6e0cc | 205 | void setup_feature_keys(void); |
9402c684 BH |
206 | #endif |
207 | ||
c5157e58 | 208 | #endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */ |