projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 94bb0c1a DD |
1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public | |
| 3 | * License. See the file "COPYING" in the main directory of this archive | |
| 4 | * for more details. | |
| 5 | * | |
| 6 | * Copyright (c) 2010 Cavium Networks, Inc. | |
| 7 | */ | |
| 8 | #ifndef _ASM_MIPS_JUMP_LABEL_H | |
| 9 | #define _ASM_MIPS_JUMP_LABEL_H | |
| 10 | ||
| 55dd0df7 | 11 | #ifndef __ASSEMBLY__ |
| 94bb0c1a | 12 | |
| 55dd0df7 | 13 | #include <linux/types.h> |
| 94bb0c1a DD |
14 | |
| 15 | #define JUMP_LABEL_NOP_SIZE 4 | |
| 16 | ||
| 17 | #ifdef CONFIG_64BIT | |
| 18 | #define WORD_INSN ".dword" | |
| 19 | #else | |
| 20 | #define WORD_INSN ".word" | |
| 21 | #endif | |
| 22 | ||
| 935c2dbe MR |
23 | #ifdef CONFIG_CPU_MICROMIPS |
| 24 | #define NOP_INSN "nop32" | |
| 25 | #else | |
| 26 | #define NOP_INSN "nop" | |
| 27 | #endif | |
| 28 | ||
| 11276d53 | 29 | static __always_inline bool arch_static_branch(struct static_key *key, bool branch) |
| d430d3d7 | 30 | { |
| 935c2dbe | 31 | asm_volatile_goto("1:\t" NOP_INSN "\n\t" |
| d430d3d7 JB |
32 | "nop\n\t" |
| 33 | ".pushsection __jump_table, \"aw\"\n\t" | |
| 34 | WORD_INSN " 1b, %l[l_yes], %0\n\t" | |
| 35 | ".popsection\n\t" | |
| 11276d53 PZ |
36 | : : "i" (&((char *)key)[branch]) : : l_yes); |
| 37 | ||
| 38 | return false; | |
| 39 | l_yes: | |
| 40 | return true; | |
| 41 | } | |
| 42 | ||
| 43 | static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch) | |
| 44 | { | |
| 45 | asm_volatile_goto("1:\tj %l[l_yes]\n\t" | |
| 46 | "nop\n\t" | |
| 47 | ".pushsection __jump_table, \"aw\"\n\t" | |
| 48 | WORD_INSN " 1b, %l[l_yes], %0\n\t" | |
| 49 | ".popsection\n\t" | |
| 50 | : : "i" (&((char *)key)[branch]) : : l_yes); | |
| 51 | ||
| d430d3d7 JB |
52 | return false; |
| 53 | l_yes: | |
| 54 | return true; | |
| 55 | } | |
| 94bb0c1a | 56 | |
| 94bb0c1a DD |
57 | #ifdef CONFIG_64BIT |
| 58 | typedef u64 jump_label_t; | |
| 59 | #else | |
| 60 | typedef u32 jump_label_t; | |
| 61 | #endif | |
| 62 | ||
| 63 | struct jump_entry { | |
| 64 | jump_label_t code; | |
| 65 | jump_label_t target; | |
| 66 | jump_label_t key; | |
| 67 | }; | |
| 68 | ||
| 55dd0df7 | 69 | #endif /* __ASSEMBLY__ */ |
| 94bb0c1a | 70 | #endif /* _ASM_MIPS_JUMP_LABEL_H */ |