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75 lines
1.5 KiB
75 lines
1.5 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (c) 2010 Cavium Networks, Inc. |
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*/ |
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#ifndef _ASM_MIPS_JUMP_LABEL_H |
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#define _ASM_MIPS_JUMP_LABEL_H |
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#ifndef __ASSEMBLY__ |
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#include <linux/types.h> |
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#include <asm/isa-rev.h> |
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#define JUMP_LABEL_NOP_SIZE 4 |
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#ifdef CONFIG_64BIT |
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#define WORD_INSN ".dword" |
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#else |
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#define WORD_INSN ".word" |
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#endif |
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#ifdef CONFIG_CPU_MICROMIPS |
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# define B_INSN "b32" |
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# define J_INSN "j32" |
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#elif MIPS_ISA_REV >= 6 |
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# define B_INSN "bc" |
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# define J_INSN "bc" |
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#else |
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# define B_INSN "b" |
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# define J_INSN "j" |
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#endif |
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static __always_inline bool arch_static_branch(struct static_key *key, bool branch) |
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{ |
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asm_volatile_goto("1:\t" B_INSN " 2f\n\t" |
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"2:\t.insn\n\t" |
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".pushsection __jump_table, \"aw\"\n\t" |
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WORD_INSN " 1b, %l[l_yes], %0\n\t" |
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".popsection\n\t" |
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: : "i" (&((char *)key)[branch]) : : l_yes); |
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return false; |
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l_yes: |
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return true; |
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} |
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static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch) |
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{ |
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asm_volatile_goto("1:\t" J_INSN " %l[l_yes]\n\t" |
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".pushsection __jump_table, \"aw\"\n\t" |
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WORD_INSN " 1b, %l[l_yes], %0\n\t" |
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".popsection\n\t" |
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: : "i" (&((char *)key)[branch]) : : l_yes); |
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return false; |
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l_yes: |
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return true; |
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} |
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#ifdef CONFIG_64BIT |
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typedef u64 jump_label_t; |
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#else |
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typedef u32 jump_label_t; |
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#endif |
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struct jump_entry { |
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jump_label_t code; |
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jump_label_t target; |
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jump_label_t key; |
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}; |
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#endif /* __ASSEMBLY__ */ |
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#endif /* _ASM_MIPS_JUMP_LABEL_H */
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