1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public
3*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive for
4*4882a593Smuzhiyun * more details.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Copyright (C) 2009 DSLab, Lanzhou University, China
7*4882a593Smuzhiyun * Author: Wu Zhangjin <wuzhangjin@gmail.com>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #ifndef _ASM_MIPS_FTRACE_H
11*4882a593Smuzhiyun #define _ASM_MIPS_FTRACE_H
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #ifdef CONFIG_FUNCTION_TRACER
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #define MCOUNT_ADDR ((unsigned long)(_mcount))
16*4882a593Smuzhiyun #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun #ifndef __ASSEMBLY__
19*4882a593Smuzhiyun extern void _mcount(void);
20*4882a593Smuzhiyun #define mcount _mcount
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #define safe_load(load, src, dst, error) \
23*4882a593Smuzhiyun do { \
24*4882a593Smuzhiyun asm volatile ( \
25*4882a593Smuzhiyun "1: " load " %[tmp_dst], 0(%[tmp_src])\n" \
26*4882a593Smuzhiyun " li %[tmp_err], 0\n" \
27*4882a593Smuzhiyun "2: .insn\n" \
28*4882a593Smuzhiyun \
29*4882a593Smuzhiyun ".section .fixup, \"ax\"\n" \
30*4882a593Smuzhiyun "3: li %[tmp_err], 1\n" \
31*4882a593Smuzhiyun " j 2b\n" \
32*4882a593Smuzhiyun ".previous\n" \
33*4882a593Smuzhiyun \
34*4882a593Smuzhiyun ".section\t__ex_table,\"a\"\n\t" \
35*4882a593Smuzhiyun STR(PTR) "\t1b, 3b\n\t" \
36*4882a593Smuzhiyun ".previous\n" \
37*4882a593Smuzhiyun \
38*4882a593Smuzhiyun : [tmp_dst] "=&r" (dst), [tmp_err] "=r" (error)\
39*4882a593Smuzhiyun : [tmp_src] "r" (src) \
40*4882a593Smuzhiyun : "memory" \
41*4882a593Smuzhiyun ); \
42*4882a593Smuzhiyun } while (0)
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun #define safe_store(store, src, dst, error) \
45*4882a593Smuzhiyun do { \
46*4882a593Smuzhiyun asm volatile ( \
47*4882a593Smuzhiyun "1: " store " %[tmp_src], 0(%[tmp_dst])\n"\
48*4882a593Smuzhiyun " li %[tmp_err], 0\n" \
49*4882a593Smuzhiyun "2: .insn\n" \
50*4882a593Smuzhiyun \
51*4882a593Smuzhiyun ".section .fixup, \"ax\"\n" \
52*4882a593Smuzhiyun "3: li %[tmp_err], 1\n" \
53*4882a593Smuzhiyun " j 2b\n" \
54*4882a593Smuzhiyun ".previous\n" \
55*4882a593Smuzhiyun \
56*4882a593Smuzhiyun ".section\t__ex_table,\"a\"\n\t"\
57*4882a593Smuzhiyun STR(PTR) "\t1b, 3b\n\t" \
58*4882a593Smuzhiyun ".previous\n" \
59*4882a593Smuzhiyun \
60*4882a593Smuzhiyun : [tmp_err] "=r" (error) \
61*4882a593Smuzhiyun : [tmp_dst] "r" (dst), [tmp_src] "r" (src)\
62*4882a593Smuzhiyun : "memory" \
63*4882a593Smuzhiyun ); \
64*4882a593Smuzhiyun } while (0)
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun #define safe_load_code(dst, src, error) \
67*4882a593Smuzhiyun safe_load(STR(lw), src, dst, error)
68*4882a593Smuzhiyun #define safe_store_code(src, dst, error) \
69*4882a593Smuzhiyun safe_store(STR(sw), src, dst, error)
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun #define safe_load_stack(dst, src, error) \
72*4882a593Smuzhiyun safe_load(STR(PTR_L), src, dst, error)
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun #define safe_store_stack(src, dst, error) \
75*4882a593Smuzhiyun safe_store(STR(PTR_S), src, dst, error)
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun #ifdef CONFIG_DYNAMIC_FTRACE
ftrace_call_adjust(unsigned long addr)79*4882a593Smuzhiyun static inline unsigned long ftrace_call_adjust(unsigned long addr)
80*4882a593Smuzhiyun {
81*4882a593Smuzhiyun return addr;
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun struct dyn_arch_ftrace {
85*4882a593Smuzhiyun };
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun #endif /* CONFIG_DYNAMIC_FTRACE */
88*4882a593Smuzhiyun #endif /* __ASSEMBLY__ */
89*4882a593Smuzhiyun #endif /* CONFIG_FUNCTION_TRACER */
90*4882a593Smuzhiyun #endif /* _ASM_MIPS_FTRACE_H */
91