diff options
Diffstat (limited to 'arch/powerpc/include/asm/feature-fixups.h')
| -rw-r--r-- | arch/powerpc/include/asm/feature-fixups.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/feature-fixups.h b/arch/powerpc/include/asm/feature-fixups.h new file mode 100644 index 000000000..9a67a38bf --- /dev/null +++ b/arch/powerpc/include/asm/feature-fixups.h @@ -0,0 +1,187 @@ +#ifndef __ASM_POWERPC_FEATURE_FIXUPS_H +#define __ASM_POWERPC_FEATURE_FIXUPS_H + +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +/* + * Feature section common macros + * + * Note that the entries now contain offsets between the table entry + * and the code rather than absolute code pointers in order to be + * useable with the vdso shared library. There is also an assumption + * that values will be negative, that is, the fixup table has to be + * located after the code it fixes up. + */ +#if defined(CONFIG_PPC64) && !defined(__powerpc64__) +/* 64 bits kernel, 32 bits code (ie. vdso32) */ +#define FTR_ENTRY_LONG .llong +#define FTR_ENTRY_OFFSET .long 0xffffffff; .long +#elif defined(CONFIG_PPC64) +#define FTR_ENTRY_LONG .llong +#define FTR_ENTRY_OFFSET .llong +#else +#define FTR_ENTRY_LONG .long +#define FTR_ENTRY_OFFSET .long +#endif + +#define START_FTR_SECTION(label) label##1: + +#define FTR_SECTION_ELSE_NESTED(label) \ +label##2: \ + .pushsection __ftr_alt_##label,"a"; \ + .align 2; \ +label##3: + +#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect) \ +label##4: \ + .popsection; \ + .pushsection sect,"a"; \ + .align 3; \ +label##5: \ + FTR_ENTRY_LONG msk; \ + FTR_ENTRY_LONG val; \ + FTR_ENTRY_OFFSET label##1b-label##5b; \ + FTR_ENTRY_OFFSET label##2b-label##5b; \ + FTR_ENTRY_OFFSET label##3b-label##5b; \ + FTR_ENTRY_OFFSET label##4b-label##5b; \ + .ifgt (label##4b- label##3b)-(label##2b- label##1b); \ + .error "Feature section else case larger than body"; \ + .endif; \ + .popsection; + + +/* CPU feature dependent sections */ +#define BEGIN_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) +#define BEGIN_FTR_SECTION START_FTR_SECTION(97) + +#define END_FTR_SECTION_NESTED(msk, val, label) \ + FTR_SECTION_ELSE_NESTED(label) \ + MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup) + +#define END_FTR_SECTION(msk, val) \ + END_FTR_SECTION_NESTED(msk, val, 97) + +#define END_FTR_SECTION_IFSET(msk) END_FTR_SECTION((msk), (msk)) +#define END_FTR_SECTION_IFCLR(msk) END_FTR_SECTION((msk), 0) + +/* CPU feature sections with alternatives, use BEGIN_FTR_SECTION to start */ +#define FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97) +#define ALT_FTR_SECTION_END_NESTED(msk, val, label) \ + MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup) +#define ALT_FTR_SECTION_END_NESTED_IFSET(msk, label) \ + ALT_FTR_SECTION_END_NESTED(msk, msk, label) +#define ALT_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ + ALT_FTR_SECTION_END_NESTED(msk, 0, label) +#define ALT_FTR_SECTION_END(msk, val) \ + ALT_FTR_SECTION_END_NESTED(msk, val, 97) +#define ALT_FTR_SECTION_END_IFSET(msk) \ + ALT_FTR_SECTION_END_NESTED_IFSET(msk, 97) +#define ALT_FTR_SECTION_END_IFCLR(msk) \ + ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97) + +/* MMU feature dependent sections */ +#define BEGIN_MMU_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) +#define BEGIN_MMU_FTR_SECTION START_FTR_SECTION(97) + +#define END_MMU_FTR_SECTION_NESTED(msk, val, label) \ + FTR_SECTION_ELSE_NESTED(label) \ + MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup) + +#define END_MMU_FTR_SECTION(msk, val) \ + END_MMU_FTR_SECTION_NESTED(msk, val, 97) + +#define END_MMU_FTR_SECTION_IFSET(msk) END_MMU_FTR_SECTION((msk), (msk)) +#define END_MMU_FTR_SECTION_IFCLR(msk) END_MMU_FTR_SECTION((msk), 0) + +/* MMU feature sections with alternatives, use BEGIN_FTR_SECTION to start */ +#define MMU_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label) +#define MMU_FTR_SECTION_ELSE MMU_FTR_SECTION_ELSE_NESTED(97) +#define ALT_MMU_FTR_SECTION_END_NESTED(msk, val, label) \ + MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup) +#define ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, label) \ + ALT_MMU_FTR_SECTION_END_NESTED(msk, msk, label) +#define ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ + ALT_MMU_FTR_SECTION_END_NESTED(msk, 0, label) +#define ALT_MMU_FTR_SECTION_END(msk, val) \ + ALT_MMU_FTR_SECTION_END_NESTED(msk, val, 97) +#define ALT_MMU_FTR_SECTION_END_IFSET(msk) \ + ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, 97) +#define ALT_MMU_FTR_SECTION_END_IFCLR(msk) \ + ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, 97) + +/* Firmware feature dependent sections */ +#define BEGIN_FW_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) +#define BEGIN_FW_FTR_SECTION START_FTR_SECTION(97) + +#define END_FW_FTR_SECTION_NESTED(msk, val, label) \ + FTR_SECTION_ELSE_NESTED(label) \ + MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup) + +#define END_FW_FTR_SECTION(msk, val) \ + END_FW_FTR_SECTION_NESTED(msk, val, 97) + +#define END_FW_FTR_SECTION_IFSET(msk) END_FW_FTR_SECTION((msk), (msk)) +#define END_FW_FTR_SECTION_IFCLR(msk) END_FW_FTR_SECTION((msk), 0) + +/* Firmware feature sections with alternatives */ +#define FW_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label) +#define FW_FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97) +#define ALT_FW_FTR_SECTION_END_NESTED(msk, val, label) \ + MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup) +#define ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, label) \ + ALT_FW_FTR_SECTION_END_NESTED(msk, msk, label) +#define ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ + ALT_FW_FTR_SECTION_END_NESTED(msk, 0, label) +#define ALT_FW_FTR_SECTION_END(msk, val) \ + ALT_FW_FTR_SECTION_END_NESTED(msk, val, 97) +#define ALT_FW_FTR_SECTION_END_IFSET(msk) \ + ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, 97) +#define ALT_FW_FTR_SECTION_END_IFCLR(msk) \ + ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97) + +#ifndef __ASSEMBLY__ + +#define ASM_FTR_IF(section_if, section_else, msk, val) \ + stringify_in_c(BEGIN_FTR_SECTION) \ + section_if "; " \ + stringify_in_c(FTR_SECTION_ELSE) \ + section_else "; " \ + stringify_in_c(ALT_FTR_SECTION_END((msk), (val))) + +#define ASM_FTR_IFSET(section_if, section_else, msk) \ + ASM_FTR_IF(section_if, section_else, (msk), (msk)) + +#define ASM_FTR_IFCLR(section_if, section_else, msk) \ + ASM_FTR_IF(section_if, section_else, (msk), 0) + +#define ASM_MMU_FTR_IF(section_if, section_else, msk, val) \ + stringify_in_c(BEGIN_MMU_FTR_SECTION) \ + section_if "; " \ + stringify_in_c(MMU_FTR_SECTION_ELSE) \ + section_else "; " \ + stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val))) + +#define ASM_MMU_FTR_IFSET(section_if, section_else, msk) \ + ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk)) + +#define ASM_MMU_FTR_IFCLR(section_if, section_else, msk) \ + ASM_MMU_FTR_IF(section_if, section_else, (msk), 0) + +#endif /* __ASSEMBLY__ */ + +/* LWSYNC feature sections */ +#define START_LWSYNC_SECTION(label) label##1: +#define MAKE_LWSYNC_SECTION_ENTRY(label, sect) \ +label##2: \ + .pushsection sect,"a"; \ + .align 2; \ +label##3: \ + FTR_ENTRY_OFFSET label##1b-label##3b; \ + .popsection; + +#endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */ |