1 #ifndef _ASM_POWERPC_JUMP_LABEL_H
2 #define _ASM_POWERPC_JUMP_LABEL_H
5 * Copyright 2010 Michael Ellerman, IBM Corp.
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.
14 #include <linux/types.h>
16 #include <asm/feature-fixups.h>
18 #define JUMP_ENTRY_TYPE stringify_in_c(FTR_ENTRY_LONG)
19 #define JUMP_LABEL_NOP_SIZE 4
21 static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
23 asm_volatile_goto("1:\n\t"
25 ".pushsection __jump_table, \"aw\"\n\t"
26 JUMP_ENTRY_TYPE "1b, %l[l_yes], %c0\n\t"
28 : : "i" (&((char *)key)[branch]) : : l_yes);
35 static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
37 asm_volatile_goto("1:\n\t"
39 ".pushsection __jump_table, \"aw\"\n\t"
40 JUMP_ENTRY_TYPE "1b, %l[l_yes], %c0\n\t"
42 : : "i" (&((char *)key)[branch]) : : l_yes);
50 typedef u64 jump_label_t;
52 typedef u32 jump_label_t;
62 #define ARCH_STATIC_BRANCH(LABEL, KEY) \
64 .pushsection __jump_table, "aw"; \
65 FTR_ENTRY_LONG 1098b, LABEL, KEY; \
69 #endif /* _ASM_POWERPC_JUMP_LABEL_H */