1 /*
2  * arch/xtensa/include/asm/ftrace.h
3  *
4  * This file is subject to the terms and conditions of the GNU General Public
5  * License.  See the file "COPYING" in the main directory of this archive
6  * for more details.
7  *
8  * Copyright (C) 2013 Tensilica Inc.
9  */
10 #ifndef _XTENSA_FTRACE_H
11 #define _XTENSA_FTRACE_H
12 
13 #include <asm/processor.h>
14 
15 #ifndef __ASSEMBLY__
16 #define ftrace_return_address0 ({ unsigned long a0, a1; \
17 		__asm__ __volatile__ ( \
18 			"mov %0, a0\n" \
19 			"mov %1, a1\n" \
20 			: "=r"(a0), "=r"(a1)); \
21 		MAKE_PC_FROM_RA(a0, a1); })
22 
23 #ifdef CONFIG_FRAME_POINTER
24 extern unsigned long return_address(unsigned level);
25 #define ftrace_return_address(n) return_address(n)
26 #endif
27 #endif /* __ASSEMBLY__ */
28 
29 #ifdef CONFIG_FUNCTION_TRACER
30 
31 #define MCOUNT_ADDR ((unsigned long)(_mcount))
32 #define MCOUNT_INSN_SIZE 3
33 
34 #ifndef __ASSEMBLY__
35 extern void _mcount(void);
36 #define mcount _mcount
37 #endif /* __ASSEMBLY__ */
38 #endif /* CONFIG_FUNCTION_TRACER */
39 
40 #endif /* _XTENSA_FTRACE_H */
41