projects / deliverable / linux.git / blame
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|---|---|---|
| ac5f89c7 ME |
1 | #ifndef _ASM_POWERPC_JUMP_LABEL_H |
| 2 | #define _ASM_POWERPC_JUMP_LABEL_H | |
| 3 | ||
| 4 | /* | |
| 5 | * Copyright 2010 Michael Ellerman, IBM Corp. | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU General Public License | |
| 9 | * as published by the Free Software Foundation; either version | |
| 10 | * 2 of the License, or (at your option) any later version. | |
| 11 | */ | |
| 12 | ||
| 13 | #include <linux/types.h> | |
| 14 | ||
| 15 | #include <asm/feature-fixups.h> | |
| 16 | ||
| 17 | #define JUMP_ENTRY_TYPE stringify_in_c(FTR_ENTRY_LONG) | |
| 18 | #define JUMP_LABEL_NOP_SIZE 4 | |
| 19 | ||
| c5905afb | 20 | static __always_inline bool arch_static_branch(struct static_key *key) |
| ac5f89c7 ME |
21 | { |
| 22 | asm goto("1:\n\t" | |
| 23 | "nop\n\t" | |
| 24 | ".pushsection __jump_table, \"aw\"\n\t" | |
| ac5f89c7 ME |
25 | JUMP_ENTRY_TYPE "1b, %l[l_yes], %c0\n\t" |
| 26 | ".popsection \n\t" | |
| 27 | : : "i" (key) : : l_yes); | |
| 28 | return false; | |
| 29 | l_yes: | |
| 30 | return true; | |
| 31 | } | |
| 32 | ||
| 33 | #ifdef CONFIG_PPC64 | |
| 34 | typedef u64 jump_label_t; | |
| 35 | #else | |
| 36 | typedef u32 jump_label_t; | |
| 37 | #endif | |
| 38 | ||
| 39 | struct jump_entry { | |
| 40 | jump_label_t code; | |
| 41 | jump_label_t target; | |
| 42 | jump_label_t key; | |
| ac5f89c7 ME |
43 | }; |
| 44 | ||
| 45 | #endif /* _ASM_POWERPC_JUMP_LABEL_H */ |