2012-11-19 12:30:15 +08:00
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/*
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* arch/xtensa/include/asm/traps.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2012 Tensilica Inc.
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*/
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#ifndef _XTENSA_TRAPS_H
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#define _XTENSA_TRAPS_H
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#include <asm/ptrace.h>
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/*
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* handler must be either of the following:
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* void (*)(struct pt_regs *regs);
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* void (*)(struct pt_regs *regs, unsigned long exccause);
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*/
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extern void * __init trap_set_handler(int cause, void *handler);
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extern void do_unhandled(struct pt_regs *regs, unsigned long exccause);
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2013-02-03 09:39:22 +08:00
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static inline void spill_registers(void)
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{
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__asm__ __volatile__ (
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2013-04-06 08:10:13 +08:00
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"movi a14, "__stringify((1 << PS_EXCM_BIT) | LOCKLEVEL)"\n\t"
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2013-02-03 09:39:22 +08:00
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"mov a12, a0\n\t"
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"rsr a13, sar\n\t"
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"xsr a14, ps\n\t"
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"movi a0, _spill_registers\n\t"
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"rsync\n\t"
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"callx0 a0\n\t"
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"mov a0, a12\n\t"
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"wsr a13, sar\n\t"
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"wsr a14, ps\n\t"
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2013-04-06 08:10:13 +08:00
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: :
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2013-02-03 09:39:22 +08:00
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#if defined(CONFIG_FRAME_POINTER)
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: "a2", "a3", "a4", "a11", "a12", "a13", "a14", "a15",
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#else
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: "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15",
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#endif
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"memory");
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}
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2012-11-19 12:30:15 +08:00
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#endif /* _XTENSA_TRAPS_H */
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