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_IFSET(msk) END_FTR_SECTION((msk), (msk)) 70 #define END_FTR_SECTION_IFCLR(msk) END_FTR_SECTION((msk), 0) 71 72 /* CPU feature sections with alternatives, use BEGIN_FTR_SECTION to start */ 73 #define FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97) 74 #define ALT_FTR_SECTION_END_NESTED(msk, val, label) \ 75 MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup) 76 #define ALT_FTR_SECTION_END_NESTED_IFSET(msk, label) \ 77 ALT_FTR_SECTION_END_NESTED(msk, msk, label) 78 #define ALT_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ 79 ALT_FTR_SECTION_END_NESTED(msk, 0, label) 80 #define ALT_FTR_SECTION_END(msk, val) \ 81 ALT_FTR_SECTION_END_NESTED(msk, val, 97) 82 #define ALT_FTR_SECTION_END_IFSET(msk) \ 83 ALT_FTR_SECTION_END_NESTED_IFSET(msk, 97) 84 #define ALT_FTR_SECTION_END_IFCLR(msk) \ 85 ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97) 86 87 /* MMU feature dependent sections */ 88 #define BEGIN_MMU_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) 89 #define BEGIN_MMU_FTR_SECTION START_FTR_SECTION(97) 90 91 #define END_MMU_FTR_SECTION_NESTED(msk, val, label) \ 92 FTR_SECTION_ELSE_NESTED(label) \ 93 MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup) 94 95 #define END_MMU_FTR_SECTION(msk, val) \ 96 END_MMU_FTR_SECTION_NESTED(msk, val, 97) 97 98 #define END_MMU_FTR_SECTION_IFSET(msk) END_MMU_FTR_SECTION((msk), (msk)) 99 #define END_MMU_FTR_SECTION_IFCLR(msk) END_MMU_FTR_SECTION((msk), 0) 100 101 /* MMU feature sections with alternatives, use BEGIN_FTR_SECTION to start */ 102 #define MMU_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label) 103 #define MMU_FTR_SECTION_ELSE MMU_FTR_SECTION_ELSE_NESTED(97) 104 #define ALT_MMU_FTR_SECTION_END_NESTED(msk, val, label) \ 105 MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup) 106 #define ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, label) \ 107 ALT_MMU_FTR_SECTION_END_NESTED(msk, msk, label) 108 #define ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ 109 ALT_MMU_FTR_SECTION_END_NESTED(msk, 0, label) 110 #define ALT_MMU_FTR_SECTION_END(msk, val) \ 111 ALT_MMU_FTR_SECTION_END_NESTED(msk, val, 97) 112 #define ALT_MMU_FTR_SECTION_END_IFSET(msk) \ 113 ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, 97) 114 #define ALT_MMU_FTR_SECTION_END_IFCLR(msk) \ 115 ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, 97) 116 117 /* Firmware feature dependent sections */ 118 #define BEGIN_FW_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) 119 #define BEGIN_FW_FTR_SECTION START_FTR_SECTION(97) 120 121 #define END_FW_FTR_SECTION_NESTED(msk, val, label) \ 122 FTR_SECTION_ELSE_NESTED(label) \ 123 MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup) 124 125 #define END_FW_FTR_SECTION(msk, val) \ 126 END_FW_FTR_SECTION_NESTED(msk, val, 97) 127 128 #define END_FW_FTR_SECTION_IFSET(msk) END_FW_FTR_SECTION((msk), (msk)) 129 #define END_FW_FTR_SECTION_IFCLR(msk) END_FW_FTR_SECTION((msk), 0) 130 131 /* Firmware feature sections with alternatives */ 132 #define FW_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label) 133 #define FW_FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97) 134 #define ALT_FW_FTR_SECTION_END_NESTED(msk, val, label) \ 135 MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup) 136 #define ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, label) \ 137 ALT_FW_FTR_SECTION_END_NESTED(msk, msk, label) 138 #define ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ 139 ALT_FW_FTR_SECTION_END_NESTED(msk, 0, label) 140 #define ALT_FW_FTR_SECTION_END(msk, val) \ 141 ALT_FW_FTR_SECTION_END_NESTED(msk, val, 97) 142 #define ALT_FW_FTR_SECTION_END_IFSET(msk) \ 143 ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, 97) 144 #define ALT_FW_FTR_SECTION_END_IFCLR(msk) \ 145 ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97) 146 147 #ifndef __ASSEMBLY__ 148 149 #define ASM_MMU_FTR_IF(section_if, section_else, msk, val) \ 150 stringify_in_c(BEGIN_MMU_FTR_SECTION) \ 151 section_if "; " \ 152 stringify_in_c(MMU_FTR_SECTION_ELSE) \ 153 section_else "; " \ 154 stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val))) 155 156 #define ASM_MMU_FTR_IFSET(section_if, section_else, msk) \ 157 ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk)) 158 159 #define ASM_MMU_FTR_IFCLR(section_if, section_else, msk) \ 160 ASM_MMU_FTR_IF(section_if, section_else, (msk), 0) 161 162 #endif /* __ASSEMBLY__ */ 163 164 /* LWSYNC feature sections */ 165 #define START_LWSYNC_SECTION(label) label##1: 166 #define MAKE_LWSYNC_SECTION_ENTRY(label, sect) \ 167 label##2: \ 168 .pushsection sect,"a"; \ 169 .align 2; \ 170 label##3: \ 171 FTR_ENTRY_OFFSET label##1b-label##3b; \ 172 .popsection; 173 174 #endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */ 175