1 /* 2 * arch/xtensa/include/asm/traps.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) 2012 Tensilica Inc. 9 */ 10 #ifndef _XTENSA_TRAPS_H 11 #define _XTENSA_TRAPS_H 12 13 #include <asm/ptrace.h> 14 15 /* 16 * handler must be either of the following: 17 * void (*)(struct pt_regs *regs); 18 * void (*)(struct pt_regs *regs, unsigned long exccause); 19 */ 20 extern void * __init trap_set_handler(int cause, void *handler); 21 extern void do_unhandled(struct pt_regs *regs, unsigned long exccause); 22 23 static inline void spill_registers(void) 24 { 25 26 __asm__ __volatile__ ( 27 "movi a14, "__stringify((1 << PS_EXCM_BIT) | LOCKLEVEL)"\n\t" 28 "mov a12, a0\n\t" 29 "rsr a13, sar\n\t" 30 "xsr a14, ps\n\t" 31 "movi a0, _spill_registers\n\t" 32 "rsync\n\t" 33 "callx0 a0\n\t" 34 "mov a0, a12\n\t" 35 "wsr a13, sar\n\t" 36 "wsr a14, ps\n\t" 37 : : 38 #if defined(CONFIG_FRAME_POINTER) 39 : "a2", "a3", "a4", "a11", "a12", "a13", "a14", "a15", 40 #else 41 : "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15", 42 #endif 43 "memory"); 44 } 45 46 #endif /* _XTENSA_TRAPS_H */ 47