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) \ 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_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_FTR_IF(section_if, section_else, msk, val) \ 150 stringify_in_c(BEGIN_FTR_SECTION) \ 151 section_if "; " \ 152 stringify_in_c(FTR_SECTION_ELSE) \ 153 section_else "; " \ 154 stringify_in_c(ALT_FTR_SECTION_END((msk), (val))) 155 156#define ASM_FTR_IFSET(section_if, section_else, msk) \ 157 ASM_FTR_IF(section_if, section_else, (msk), (msk)) 158 159#define ASM_FTR_IFCLR(section_if, section_else, msk) \ 160 ASM_FTR_IF(section_if, section_else, (msk), 0) 161 162#define ASM_MMU_FTR_IF(section_if, section_else, msk, val) \ 163 stringify_in_c(BEGIN_MMU_FTR_SECTION) \ 164 section_if "; " \ 165 stringify_in_c(MMU_FTR_SECTION_ELSE) \ 166 section_else "; " \ 167 stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val))) 168 169#define ASM_MMU_FTR_IFSET(section_if, section_else, msk) \ 170 ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk)) 171 172#define ASM_MMU_FTR_IFCLR(section_if, section_else, msk) \ 173 ASM_MMU_FTR_IF(section_if, section_else, (msk), 0) 174 175#endif /* __ASSEMBLY__ */ 176 177/* LWSYNC feature sections */ 178#define START_LWSYNC_SECTION(label) label##1: 179#define MAKE_LWSYNC_SECTION_ENTRY(label, sect) \ 180label##2: \ 181 .pushsection sect,"a"; \ 182 .align 2; \ 183label##3: \ 184 FTR_ENTRY_OFFSET label##1b-label##3b; \ 185 .popsection; 186 187#endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */ 188