1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * arch/xtensa/include/asm/ftrace.h 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public 5*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive 6*4882a593Smuzhiyun * for more details. 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * Copyright (C) 2013 Tensilica Inc. 9*4882a593Smuzhiyun */ 10*4882a593Smuzhiyun #ifndef _XTENSA_FTRACE_H 11*4882a593Smuzhiyun #define _XTENSA_FTRACE_H 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include <asm/processor.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 16*4882a593Smuzhiyun #define ftrace_return_address0 ({ unsigned long a0, a1; \ 17*4882a593Smuzhiyun __asm__ __volatile__ ( \ 18*4882a593Smuzhiyun "mov %0, a0\n" \ 19*4882a593Smuzhiyun "mov %1, a1\n" \ 20*4882a593Smuzhiyun : "=r"(a0), "=r"(a1)); \ 21*4882a593Smuzhiyun MAKE_PC_FROM_RA(a0, a1); }) 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun #ifdef CONFIG_FRAME_POINTER 24*4882a593Smuzhiyun extern unsigned long return_address(unsigned level); 25*4882a593Smuzhiyun #define ftrace_return_address(n) return_address(n) 26*4882a593Smuzhiyun #endif 27*4882a593Smuzhiyun #endif /* __ASSEMBLY__ */ 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun #ifdef CONFIG_FUNCTION_TRACER 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun #define MCOUNT_ADDR ((unsigned long)(_mcount)) 32*4882a593Smuzhiyun #define MCOUNT_INSN_SIZE 3 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 35*4882a593Smuzhiyun extern void _mcount(void); 36*4882a593Smuzhiyun #define mcount _mcount 37*4882a593Smuzhiyun #endif /* __ASSEMBLY__ */ 38*4882a593Smuzhiyun #endif /* CONFIG_FUNCTION_TRACER */ 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun #endif /* _XTENSA_FTRACE_H */ 41