MIPS: sort MIPS and MIPS_GENERIC Kconfig selects alphabetically (again)
[linux-2.6-microblaze.git] / arch / mips / include / asm / ftrace.h
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 for
4  * more details.
5  *
6  * Copyright (C) 2009 DSLab, Lanzhou University, China
7  * Author: Wu Zhangjin <wuzhangjin@gmail.com>
8  */
9
10 #ifndef _ASM_MIPS_FTRACE_H
11 #define _ASM_MIPS_FTRACE_H
12
13 #ifdef CONFIG_FUNCTION_TRACER
14
15 #define MCOUNT_ADDR ((unsigned long)(_mcount))
16 #define MCOUNT_INSN_SIZE 4              /* sizeof mcount call */
17
18 #ifndef __ASSEMBLY__
19 extern void _mcount(void);
20 #define mcount _mcount
21
22 #define safe_load(load, src, dst, error)                \
23 do {                                                    \
24         asm volatile (                                  \
25                 "1: " load " %[tmp_dst], 0(%[tmp_src])\n"       \
26                 "   li %[tmp_err], 0\n"                 \
27                 "2: .insn\n"                            \
28                                                         \
29                 ".section .fixup, \"ax\"\n"             \
30                 "3: li %[tmp_err], 1\n"                 \
31                 "   j 2b\n"                             \
32                 ".previous\n"                           \
33                                                         \
34                 ".section\t__ex_table,\"a\"\n\t"        \
35                 STR(PTR) "\t1b, 3b\n\t"                 \
36                 ".previous\n"                           \
37                                                         \
38                 : [tmp_dst] "=&r" (dst), [tmp_err] "=r" (error)\
39                 : [tmp_src] "r" (src)                   \
40                 : "memory"                              \
41         );                                              \
42 } while (0)
43
44 #define safe_store(store, src, dst, error)      \
45 do {                                            \
46         asm volatile (                          \
47                 "1: " store " %[tmp_src], 0(%[tmp_dst])\n"\
48                 "   li %[tmp_err], 0\n"         \
49                 "2: .insn\n"                    \
50                                                 \
51                 ".section .fixup, \"ax\"\n"     \
52                 "3: li %[tmp_err], 1\n"         \
53                 "   j 2b\n"                     \
54                 ".previous\n"                   \
55                                                 \
56                 ".section\t__ex_table,\"a\"\n\t"\
57                 STR(PTR) "\t1b, 3b\n\t"         \
58                 ".previous\n"                   \
59                                                 \
60                 : [tmp_err] "=r" (error)        \
61                 : [tmp_dst] "r" (dst), [tmp_src] "r" (src)\
62                 : "memory"                      \
63         );                                      \
64 } while (0)
65
66 #define safe_load_code(dst, src, error) \
67         safe_load(STR(lw), src, dst, error)
68 #define safe_store_code(src, dst, error) \
69         safe_store(STR(sw), src, dst, error)
70
71 #define safe_load_stack(dst, src, error) \
72         safe_load(STR(PTR_L), src, dst, error)
73
74 #define safe_store_stack(src, dst, error) \
75         safe_store(STR(PTR_S), src, dst, error)
76
77
78 #ifdef CONFIG_DYNAMIC_FTRACE
79 static inline unsigned long ftrace_call_adjust(unsigned long addr)
80 {
81         return addr;
82 }
83
84 struct dyn_arch_ftrace {
85 };
86
87 #endif /*  CONFIG_DYNAMIC_FTRACE */
88 #endif /* __ASSEMBLY__ */
89 #endif /* CONFIG_FUNCTION_TRACER */
90 #endif /* _ASM_MIPS_FTRACE_H */