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c5157e58 ME |
1 | #ifndef __ASM_POWERPC_FEATURE_FIXUPS_H |
2 | #define __ASM_POWERPC_FEATURE_FIXUPS_H | |
3 | ||
ec0c464c CL |
4 | #include <asm/asm-const.h> |
5 | ||
c5157e58 ME |
6 | /* |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * as published by the Free Software Foundation; either version | |
10 | * 2 of the License, or (at your option) any later version. | |
11 | */ | |
12 | ||
c5157e58 ME |
13 | /* |
14 | * Feature section common macros | |
15 | * | |
16 | * Note that the entries now contain offsets between the table entry | |
17 | * and the code rather than absolute code pointers in order to be | |
18 | * useable with the vdso shared library. There is also an assumption | |
19 | * that values will be negative, that is, the fixup table has to be | |
20 | * located after the code it fixes up. | |
21 | */ | |
c1137c37 | 22 | #if defined(CONFIG_PPC64) && !defined(__powerpc64__) |
c5157e58 | 23 | /* 64 bits kernel, 32 bits code (ie. vdso32) */ |
eb039161 | 24 | #define FTR_ENTRY_LONG .8byte |
c1137c37 | 25 | #define FTR_ENTRY_OFFSET .long 0xffffffff; .long |
af20aeb1 | 26 | #elif defined(CONFIG_PPC64) |
eb039161 TH |
27 | #define FTR_ENTRY_LONG .8byte |
28 | #define FTR_ENTRY_OFFSET .8byte | |
c1137c37 | 29 | #else |
af20aeb1 MM |
30 | #define FTR_ENTRY_LONG .long |
31 | #define FTR_ENTRY_OFFSET .long | |
c1137c37 ME |
32 | #endif |
33 | ||
fac23fe4 ME |
34 | #define START_FTR_SECTION(label) label##1: |
35 | ||
36 | #define FTR_SECTION_ELSE_NESTED(label) \ | |
37 | label##2: \ | |
38 | .pushsection __ftr_alt_##label,"a"; \ | |
39 | .align 2; \ | |
40 | label##3: | |
41 | ||
c0337288 ME |
42 | #define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect) \ |
43 | label##4: \ | |
44 | .popsection; \ | |
45 | .pushsection sect,"a"; \ | |
46 | .align 3; \ | |
47 | label##5: \ | |
48 | FTR_ENTRY_LONG msk; \ | |
49 | FTR_ENTRY_LONG val; \ | |
50 | FTR_ENTRY_OFFSET label##1b-label##5b; \ | |
51 | FTR_ENTRY_OFFSET label##2b-label##5b; \ | |
52 | FTR_ENTRY_OFFSET label##3b-label##5b; \ | |
53 | FTR_ENTRY_OFFSET label##4b-label##5b; \ | |
b3e6b5df | 54 | .ifgt (label##4b- label##3b)-(label##2b- label##1b); \ |
c0337288 ME |
55 | .error "Feature section else case larger than body"; \ |
56 | .endif; \ | |
fac23fe4 | 57 | .popsection; |
c5157e58 ME |
58 | |
59 | ||
60 | /* CPU feature dependent sections */ | |
fac23fe4 ME |
61 | #define BEGIN_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) |
62 | #define BEGIN_FTR_SECTION START_FTR_SECTION(97) | |
c5157e58 | 63 | |
fac23fe4 ME |
64 | #define END_FTR_SECTION_NESTED(msk, val, label) \ |
65 | FTR_SECTION_ELSE_NESTED(label) \ | |
c5157e58 ME |
66 | MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup) |
67 | ||
68 | #define END_FTR_SECTION(msk, val) \ | |
69 | END_FTR_SECTION_NESTED(msk, val, 97) | |
70 | ||
9cba253d NP |
71 | #define END_FTR_SECTION_NESTED_IFSET(msk, label) \ |
72 | END_FTR_SECTION_NESTED((msk), (msk), label) | |
73 | ||
c5157e58 ME |
74 | #define END_FTR_SECTION_IFSET(msk) END_FTR_SECTION((msk), (msk)) |
75 | #define END_FTR_SECTION_IFCLR(msk) END_FTR_SECTION((msk), 0) | |
76 | ||
fac23fe4 ME |
77 | /* CPU feature sections with alternatives, use BEGIN_FTR_SECTION to start */ |
78 | #define FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97) | |
79 | #define ALT_FTR_SECTION_END_NESTED(msk, val, label) \ | |
80 | MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup) | |
81 | #define ALT_FTR_SECTION_END_NESTED_IFSET(msk, label) \ | |
82 | ALT_FTR_SECTION_END_NESTED(msk, msk, label) | |
83 | #define ALT_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ | |
84 | ALT_FTR_SECTION_END_NESTED(msk, 0, label) | |
85 | #define ALT_FTR_SECTION_END(msk, val) \ | |
86 | ALT_FTR_SECTION_END_NESTED(msk, val, 97) | |
87 | #define ALT_FTR_SECTION_END_IFSET(msk) \ | |
88 | ALT_FTR_SECTION_END_NESTED_IFSET(msk, 97) | |
89 | #define ALT_FTR_SECTION_END_IFCLR(msk) \ | |
90 | ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97) | |
c5157e58 | 91 | |
7c03d653 BH |
92 | /* MMU feature dependent sections */ |
93 | #define BEGIN_MMU_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) | |
94 | #define BEGIN_MMU_FTR_SECTION START_FTR_SECTION(97) | |
95 | ||
96 | #define END_MMU_FTR_SECTION_NESTED(msk, val, label) \ | |
97 | FTR_SECTION_ELSE_NESTED(label) \ | |
98 | MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup) | |
99 | ||
100 | #define END_MMU_FTR_SECTION(msk, val) \ | |
101 | END_MMU_FTR_SECTION_NESTED(msk, val, 97) | |
102 | ||
103 | #define END_MMU_FTR_SECTION_IFSET(msk) END_MMU_FTR_SECTION((msk), (msk)) | |
104 | #define END_MMU_FTR_SECTION_IFCLR(msk) END_MMU_FTR_SECTION((msk), 0) | |
105 | ||
106 | /* MMU feature sections with alternatives, use BEGIN_FTR_SECTION to start */ | |
107 | #define MMU_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label) | |
108 | #define MMU_FTR_SECTION_ELSE MMU_FTR_SECTION_ELSE_NESTED(97) | |
109 | #define ALT_MMU_FTR_SECTION_END_NESTED(msk, val, label) \ | |
110 | MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup) | |
111 | #define ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, label) \ | |
112 | ALT_MMU_FTR_SECTION_END_NESTED(msk, msk, label) | |
113 | #define ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ | |
114 | ALT_MMU_FTR_SECTION_END_NESTED(msk, 0, label) | |
115 | #define ALT_MMU_FTR_SECTION_END(msk, val) \ | |
116 | ALT_MMU_FTR_SECTION_END_NESTED(msk, val, 97) | |
117 | #define ALT_MMU_FTR_SECTION_END_IFSET(msk) \ | |
118 | ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, 97) | |
119 | #define ALT_MMU_FTR_SECTION_END_IFCLR(msk) \ | |
120 | ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, 97) | |
121 | ||
c5157e58 | 122 | /* Firmware feature dependent sections */ |
fac23fe4 ME |
123 | #define BEGIN_FW_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) |
124 | #define BEGIN_FW_FTR_SECTION START_FTR_SECTION(97) | |
c5157e58 | 125 | |
fac23fe4 ME |
126 | #define END_FW_FTR_SECTION_NESTED(msk, val, label) \ |
127 | FTR_SECTION_ELSE_NESTED(label) \ | |
c5157e58 ME |
128 | MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup) |
129 | ||
130 | #define END_FW_FTR_SECTION(msk, val) \ | |
131 | END_FW_FTR_SECTION_NESTED(msk, val, 97) | |
132 | ||
133 | #define END_FW_FTR_SECTION_IFSET(msk) END_FW_FTR_SECTION((msk), (msk)) | |
134 | #define END_FW_FTR_SECTION_IFCLR(msk) END_FW_FTR_SECTION((msk), 0) | |
135 | ||
fac23fe4 ME |
136 | /* Firmware feature sections with alternatives */ |
137 | #define FW_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label) | |
138 | #define FW_FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97) | |
139 | #define ALT_FW_FTR_SECTION_END_NESTED(msk, val, label) \ | |
140 | MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup) | |
141 | #define ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, label) \ | |
142 | ALT_FW_FTR_SECTION_END_NESTED(msk, msk, label) | |
143 | #define ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ | |
144 | ALT_FW_FTR_SECTION_END_NESTED(msk, 0, label) | |
145 | #define ALT_FW_FTR_SECTION_END(msk, val) \ | |
146 | ALT_FW_FTR_SECTION_END_NESTED(msk, val, 97) | |
147 | #define ALT_FW_FTR_SECTION_END_IFSET(msk) \ | |
148 | ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, 97) | |
149 | #define ALT_FW_FTR_SECTION_END_IFCLR(msk) \ | |
150 | ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97) | |
151 | ||
af20aeb1 MM |
152 | #ifndef __ASSEMBLY__ |
153 | ||
a32e252f MN |
154 | #define ASM_FTR_IF(section_if, section_else, msk, val) \ |
155 | stringify_in_c(BEGIN_FTR_SECTION) \ | |
156 | section_if "; " \ | |
157 | stringify_in_c(FTR_SECTION_ELSE) \ | |
158 | section_else "; " \ | |
159 | stringify_in_c(ALT_FTR_SECTION_END((msk), (val))) | |
160 | ||
161 | #define ASM_FTR_IFSET(section_if, section_else, msk) \ | |
162 | ASM_FTR_IF(section_if, section_else, (msk), (msk)) | |
163 | ||
164 | #define ASM_FTR_IFCLR(section_if, section_else, msk) \ | |
165 | ASM_FTR_IF(section_if, section_else, (msk), 0) | |
166 | ||
af20aeb1 MM |
167 | #define ASM_MMU_FTR_IF(section_if, section_else, msk, val) \ |
168 | stringify_in_c(BEGIN_MMU_FTR_SECTION) \ | |
169 | section_if "; " \ | |
170 | stringify_in_c(MMU_FTR_SECTION_ELSE) \ | |
171 | section_else "; " \ | |
172 | stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val))) | |
173 | ||
174 | #define ASM_MMU_FTR_IFSET(section_if, section_else, msk) \ | |
175 | ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk)) | |
176 | ||
177 | #define ASM_MMU_FTR_IFCLR(section_if, section_else, msk) \ | |
178 | ASM_MMU_FTR_IF(section_if, section_else, (msk), 0) | |
179 | ||
c5157e58 ME |
180 | #endif /* __ASSEMBLY__ */ |
181 | ||
2d1b2027 KG |
182 | /* LWSYNC feature sections */ |
183 | #define START_LWSYNC_SECTION(label) label##1: | |
184 | #define MAKE_LWSYNC_SECTION_ENTRY(label, sect) \ | |
185 | label##2: \ | |
186 | .pushsection sect,"a"; \ | |
187 | .align 2; \ | |
188 | label##3: \ | |
3d98ffbf | 189 | FTR_ENTRY_OFFSET label##1b-label##3b; \ |
2d1b2027 KG |
190 | .popsection; |
191 | ||
a048a07d NP |
192 | #define STF_ENTRY_BARRIER_FIXUP_SECTION \ |
193 | 953: \ | |
194 | .pushsection __stf_entry_barrier_fixup,"a"; \ | |
195 | .align 2; \ | |
196 | 954: \ | |
197 | FTR_ENTRY_OFFSET 953b-954b; \ | |
198 | .popsection; | |
199 | ||
200 | #define STF_EXIT_BARRIER_FIXUP_SECTION \ | |
201 | 955: \ | |
202 | .pushsection __stf_exit_barrier_fixup,"a"; \ | |
203 | .align 2; \ | |
204 | 956: \ | |
205 | FTR_ENTRY_OFFSET 955b-956b; \ | |
206 | .popsection; | |
207 | ||
aa8a5e00 ME |
208 | #define RFI_FLUSH_FIXUP_SECTION \ |
209 | 951: \ | |
210 | .pushsection __rfi_flush_fixup,"a"; \ | |
211 | .align 2; \ | |
212 | 952: \ | |
213 | FTR_ENTRY_OFFSET 951b-952b; \ | |
214 | .popsection; | |
215 | ||
2eea7f06 MS |
216 | #define NOSPEC_BARRIER_FIXUP_SECTION \ |
217 | 953: \ | |
218 | .pushsection __barrier_nospec_fixup,"a"; \ | |
219 | .align 2; \ | |
220 | 954: \ | |
221 | FTR_ENTRY_OFFSET 953b-954b; \ | |
222 | .popsection; | |
223 | ||
76a5eaa3 DC |
224 | #define START_BTB_FLUSH_SECTION \ |
225 | 955: \ | |
226 | ||
227 | #define END_BTB_FLUSH_SECTION \ | |
228 | 956: \ | |
229 | .pushsection __btb_flush_fixup,"a"; \ | |
230 | .align 2; \ | |
231 | 957: \ | |
232 | FTR_ENTRY_OFFSET 955b-957b; \ | |
233 | FTR_ENTRY_OFFSET 956b-957b; \ | |
234 | .popsection; | |
aa8a5e00 | 235 | |
9402c684 | 236 | #ifndef __ASSEMBLY__ |
aa8a5e00 ME |
237 | #include <linux/types.h> |
238 | ||
a048a07d NP |
239 | extern long stf_barrier_fallback; |
240 | extern long __start___stf_entry_barrier_fixup, __stop___stf_entry_barrier_fixup; | |
241 | extern long __start___stf_exit_barrier_fixup, __stop___stf_exit_barrier_fixup; | |
aa8a5e00 | 242 | extern long __start___rfi_flush_fixup, __stop___rfi_flush_fixup; |
2eea7f06 | 243 | extern long __start___barrier_nospec_fixup, __stop___barrier_nospec_fixup; |
76a5eaa3 | 244 | extern long __start__btb_flush_fixup, __stop__btb_flush_fixup; |
aa8a5e00 | 245 | |
9402c684 | 246 | void apply_feature_fixups(void); |
97f6e0cc | 247 | void setup_feature_keys(void); |
9402c684 BH |
248 | #endif |
249 | ||
c5157e58 | 250 | #endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */ |