| /* |
| * arch/xtensa/include/asm/traps.h |
| * |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 2012 Tensilica Inc. |
| */ |
| #ifndef _XTENSA_TRAPS_H |
| #define _XTENSA_TRAPS_H |
| |
| #include <asm/ptrace.h> |
| |
| /* |
| * handler must be either of the following: |
| * void (*)(struct pt_regs *regs); |
| * void (*)(struct pt_regs *regs, unsigned long exccause); |
| */ |
| extern void * __init trap_set_handler(int cause, void *handler); |
| extern void do_unhandled(struct pt_regs *regs, unsigned long exccause); |
| void secondary_trap_init(void); |
| |
| static inline void spill_registers(void) |
| { |
| |
| __asm__ __volatile__ ( |
| "movi a14, "__stringify((1 << PS_EXCM_BIT) | LOCKLEVEL)"\n\t" |
| "mov a12, a0\n\t" |
| "rsr a13, sar\n\t" |
| "xsr a14, ps\n\t" |
| "movi a0, _spill_registers\n\t" |
| "rsync\n\t" |
| "callx0 a0\n\t" |
| "mov a0, a12\n\t" |
| "wsr a13, sar\n\t" |
| "wsr a14, ps\n\t" |
| : : |
| #if defined(CONFIG_FRAME_POINTER) |
| : "a2", "a3", "a4", "a11", "a12", "a13", "a14", "a15", |
| #else |
| : "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15", |
| #endif |
| "memory"); |
| } |
| |
| #endif /* _XTENSA_TRAPS_H */ |
