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authorDavid Daney <ddaney@caviumnetworks.com>2010-12-28 16:26:23 -0500
committerRalf Baechle <ralf@linux-mips.org>2011-01-18 13:30:24 -0500
commit94bb0c1ab293c298a8852e4f10c4215bad6daa9b (patch)
treee4e7dfa18bf2ffd832a97d7ab67863b1b363c6fe /arch/mips/include/asm/jump_label.h
parent8d662c8d34a05e8e47deaa9e22fe770dc557c2d3 (diff)
MIPS: jump label: Add MIPS support.
In order not to be left behind, we add jump label support for MIPS. Tested on 64-bit big endian (Octeon), and 32-bit little endian (malta/qemu). Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Jason Baron <jbaron@redhat.com> Patchwork: https://patchwork.linux-mips.org/patch/1923/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/jump_label.h')
-rw-r--r--arch/mips/include/asm/jump_label.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/mips/include/asm/jump_label.h b/arch/mips/include/asm/jump_label.h
new file mode 100644
index 000000000000..7622ccf75076
--- /dev/null
+++ b/arch/mips/include/asm/jump_label.h
@@ -0,0 +1,48 @@
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
11#include <linux/types.h>
12
13#ifdef __KERNEL__
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
23#define JUMP_LABEL(key, label) \
24 do { \
25 asm goto("1:\tnop\n\t" \
26 "nop\n\t" \
27 ".pushsection __jump_table, \"a\"\n\t" \
28 WORD_INSN " 1b, %l[" #label "], %0\n\t" \
29 ".popsection\n\t" \
30 : : "i" (key) : : label); \
31 } while (0)
32
33
34#endif /* __KERNEL__ */
35
36#ifdef CONFIG_64BIT
37typedef u64 jump_label_t;
38#else
39typedef u32 jump_label_t;
40#endif
41
42struct jump_entry {
43 jump_label_t code;
44 jump_label_t target;
45 jump_label_t key;
46};
47
48#endif /* _ASM_MIPS_JUMP_LABEL_H */