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 .popsection; 53 54 55/* CPU feature dependent sections */ 56#define BEGIN_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) 57#define BEGIN_FTR_SECTION START_FTR_SECTION(97) 58 59#define END_FTR_SECTION_NESTED(msk, val, label) \ 60 FTR_SECTION_ELSE_NESTED(label) \ 61 MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup) 62 63#define END_FTR_SECTION(msk, val) \ 64 END_FTR_SECTION_NESTED(msk, val, 97) 65 66#define END_FTR_SECTION_IFSET(msk) END_FTR_SECTION((msk), (msk)) 67#define END_FTR_SECTION_IFCLR(msk) END_FTR_SECTION((msk), 0) 68 69/* CPU feature sections with alternatives, use BEGIN_FTR_SECTION to start */ 70#define FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97) 71#define ALT_FTR_SECTION_END_NESTED(msk, val, label) \ 72 MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup) 73#define ALT_FTR_SECTION_END_NESTED_IFSET(msk, label) \ 74 ALT_FTR_SECTION_END_NESTED(msk, msk, label) 75#define ALT_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ 76 ALT_FTR_SECTION_END_NESTED(msk, 0, label) 77#define ALT_FTR_SECTION_END(msk, val) \ 78 ALT_FTR_SECTION_END_NESTED(msk, val, 97) 79#define ALT_FTR_SECTION_END_IFSET(msk) \ 80 ALT_FTR_SECTION_END_NESTED_IFSET(msk, 97) 81#define ALT_FTR_SECTION_END_IFCLR(msk) \ 82 ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97) 83 84/* MMU feature dependent sections */ 85#define BEGIN_MMU_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) 86#define BEGIN_MMU_FTR_SECTION START_FTR_SECTION(97) 87 88#define END_MMU_FTR_SECTION_NESTED(msk, val, label) \ 89 FTR_SECTION_ELSE_NESTED(label) \ 90 MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup) 91 92#define END_MMU_FTR_SECTION(msk, val) \ 93 END_MMU_FTR_SECTION_NESTED(msk, val, 97) 94 95#define END_MMU_FTR_SECTION_IFSET(msk) END_MMU_FTR_SECTION((msk), (msk)) 96#define END_MMU_FTR_SECTION_IFCLR(msk) END_MMU_FTR_SECTION((msk), 0) 97 98/* MMU feature sections with alternatives, use BEGIN_FTR_SECTION to start */ 99#define MMU_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label) 100#define MMU_FTR_SECTION_ELSE MMU_FTR_SECTION_ELSE_NESTED(97) 101#define ALT_MMU_FTR_SECTION_END_NESTED(msk, val, label) \ 102 MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup) 103#define ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, label) \ 104 ALT_MMU_FTR_SECTION_END_NESTED(msk, msk, label) 105#define ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ 106 ALT_MMU_FTR_SECTION_END_NESTED(msk, 0, label) 107#define ALT_MMU_FTR_SECTION_END(msk, val) \ 108 ALT_MMU_FTR_SECTION_END_NESTED(msk, val, 97) 109#define ALT_MMU_FTR_SECTION_END_IFSET(msk) \ 110 ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, 97) 111#define ALT_MMU_FTR_SECTION_END_IFCLR(msk) \ 112 ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, 97) 113 114/* Firmware feature dependent sections */ 115#define BEGIN_FW_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) 116#define BEGIN_FW_FTR_SECTION START_FTR_SECTION(97) 117 118#define END_FW_FTR_SECTION_NESTED(msk, val, label) \ 119 FTR_SECTION_ELSE_NESTED(label) \ 120 MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup) 121 122#define END_FW_FTR_SECTION(msk, val) \ 123 END_FW_FTR_SECTION_NESTED(msk, val, 97) 124 125#define END_FW_FTR_SECTION_IFSET(msk) END_FW_FTR_SECTION((msk), (msk)) 126#define END_FW_FTR_SECTION_IFCLR(msk) END_FW_FTR_SECTION((msk), 0) 127 128/* Firmware feature sections with alternatives */ 129#define FW_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label) 130#define FW_FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97) 131#define ALT_FW_FTR_SECTION_END_NESTED(msk, val, label) \ 132 MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup) 133#define ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, label) \ 134 ALT_FW_FTR_SECTION_END_NESTED(msk, msk, label) 135#define ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ 136 ALT_FW_FTR_SECTION_END_NESTED(msk, 0, label) 137#define ALT_FW_FTR_SECTION_END(msk, val) \ 138 ALT_FW_FTR_SECTION_END_NESTED(msk, val, 97) 139#define ALT_FW_FTR_SECTION_END_IFSET(msk) \ 140 ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, 97) 141#define ALT_FW_FTR_SECTION_END_IFCLR(msk) \ 142 ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97) 143 144#ifndef __ASSEMBLY__ 145 146#define ASM_MMU_FTR_IF(section_if, section_else, msk, val) \ 147 stringify_in_c(BEGIN_MMU_FTR_SECTION) \ 148 section_if "; " \ 149 stringify_in_c(MMU_FTR_SECTION_ELSE) \ 150 section_else "; " \ 151 stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val))) 152 153#define ASM_MMU_FTR_IFSET(section_if, section_else, msk) \ 154 ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk)) 155 156#define ASM_MMU_FTR_IFCLR(section_if, section_else, msk) \ 157 ASM_MMU_FTR_IF(section_if, section_else, (msk), 0) 158 159#endif /* __ASSEMBLY__ */ 160 161/* LWSYNC feature sections */ 162#define START_LWSYNC_SECTION(label) label##1: 163#define MAKE_LWSYNC_SECTION_ENTRY(label, sect) \ 164label##2: \ 165 .pushsection sect,"a"; \ 166 .align 2; \ 167label##3: \ 168 FTR_ENTRY_OFFSET label##1b-label##3b; \ 169 .popsection; 170 171#endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */ 172