| #ifndef _ASM_POWERPC_JUMP_LABEL_H |
| #define _ASM_POWERPC_JUMP_LABEL_H |
| |
| /* |
| * Copyright 2010 Michael Ellerman, IBM Corp. |
| * |
| * 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. |
| */ |
| |
| #include <linux/types.h> |
| |
| #include <asm/feature-fixups.h> |
| |
| #define JUMP_ENTRY_TYPE stringify_in_c(FTR_ENTRY_LONG) |
| #define JUMP_LABEL_NOP_SIZE 4 |
| |
| static __always_inline bool arch_static_branch(struct static_key *key) |
| { |
| asm_volatile_goto("1:\n\t" |
| "nop\n\t" |
| ".pushsection __jump_table, \"aw\"\n\t" |
| JUMP_ENTRY_TYPE "1b, %l[l_yes], %c0\n\t" |
| ".popsection \n\t" |
| : : "i" (key) : : l_yes); |
| return false; |
| l_yes: |
| return true; |
| } |
| |
| #ifdef CONFIG_PPC64 |
| typedef u64 jump_label_t; |
| #else |
| typedef u32 jump_label_t; |
| #endif |
| |
| struct jump_entry { |
| jump_label_t code; |
| jump_label_t target; |
| jump_label_t key; |
| }; |
| |
| #endif /* _ASM_POWERPC_JUMP_LABEL_H */ |
