projects / linux-2.6-block.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 | ||
| 7e6b9db2 AB |
11 | #define arch_jump_label_transform_static arch_jump_label_transform |
| 12 | ||
| 55dd0df7 | 13 | #ifndef __ASSEMBLY__ |
| 94bb0c1a | 14 | |
| 55dd0df7 | 15 | #include <linux/types.h> |
| 9b6584e3 | 16 | #include <asm/isa-rev.h> |
| 94bb0c1a DD |
17 | |
| 18 | #define JUMP_LABEL_NOP_SIZE 4 | |
| 19 | ||
| 20 | #ifdef CONFIG_64BIT | |
| 21 | #define WORD_INSN ".dword" | |
| 22 | #else | |
| 23 | #define WORD_INSN ".word" | |
| 24 | #endif | |
| 25 | ||
| 935c2dbe | 26 | #ifdef CONFIG_CPU_MICROMIPS |
| 9b6584e3 PB |
27 | # define B_INSN "b32" |
| 28 | # define J_INSN "j32" | |
| 29 | #elif MIPS_ISA_REV >= 6 | |
| 30 | # define B_INSN "bc" | |
| 31 | # define J_INSN "bc" | |
| 935c2dbe | 32 | #else |
| 9b6584e3 PB |
33 | # define B_INSN "b" |
| 34 | # define J_INSN "j" | |
| 935c2dbe MR |
35 | #endif |
| 36 | ||
| 11276d53 | 37 | static __always_inline bool arch_static_branch(struct static_key *key, bool branch) |
| d430d3d7 | 38 | { |
| 47c25036 | 39 | asm_volatile_goto("1:\t" B_INSN " 2f\n\t" |
| c838b580 | 40 | "2:\t.insn\n\t" |
| d430d3d7 JB |
41 | ".pushsection __jump_table, \"aw\"\n\t" |
| 42 | WORD_INSN " 1b, %l[l_yes], %0\n\t" | |
| 43 | ".popsection\n\t" | |
| 11276d53 PZ |
44 | : : "i" (&((char *)key)[branch]) : : l_yes); |
| 45 | ||
| 46 | return false; | |
| 47 | l_yes: | |
| 48 | return true; | |
| 49 | } | |
| 50 | ||
| 51 | static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch) | |
| 52 | { | |
| 9b6584e3 | 53 | asm_volatile_goto("1:\t" J_INSN " %l[l_yes]\n\t" |
| 11276d53 PZ |
54 | ".pushsection __jump_table, \"aw\"\n\t" |
| 55 | WORD_INSN " 1b, %l[l_yes], %0\n\t" | |
| 56 | ".popsection\n\t" | |
| 57 | : : "i" (&((char *)key)[branch]) : : l_yes); | |
| 58 | ||
| d430d3d7 JB |
59 | return false; |
| 60 | l_yes: | |
| 61 | return true; | |
| 62 | } | |
| 94bb0c1a | 63 | |
| 94bb0c1a DD |
64 | #ifdef CONFIG_64BIT |
| 65 | typedef u64 jump_label_t; | |
| 66 | #else | |
| 67 | typedef u32 jump_label_t; | |
| 68 | #endif | |
| 69 | ||
| 70 | struct jump_entry { | |
| 71 | jump_label_t code; | |
| 72 | jump_label_t target; | |
| 73 | jump_label_t key; | |
| 74 | }; | |
| 75 | ||
| 55dd0df7 | 76 | #endif /* __ASSEMBLY__ */ |
| 94bb0c1a | 77 | #endif /* _ASM_MIPS_JUMP_LABEL_H */ |