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 .llong 23 #define FTR_ENTRY_OFFSET .long 0xffffffff; .long 24 #elif defined(CONFIG_PPC64) 25 #define FTR_ENTRY_LONG .llong 26 #define FTR_ENTRY_OFFSET .llong 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) \ 35 label##2: \ 36 .pushsection __ftr_alt_##label,"a"; \ 37 .align 2; \ 38 label##3: 39 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; \ 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) \ 183 label##2: \ 184 .pushsection sect,"a"; \ 185 .align 2; \ 186 label##3: \ 187 FTR_ENTRY_OFFSET label##1b-label##3b; \ 188 .popsection; 189 190 #ifndef __ASSEMBLY__ 191 void apply_feature_fixups(void); 192 void setup_feature_keys(void); 193 #endif 194 195 #endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */ 196