| Max Filippov | 28570e8 | 2012-11-19 08:30:15 +0400 | [diff] [blame] | 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 | |
| Max Filippov | 2d6f82f | 2013-02-03 05:39:22 +0400 | [diff] [blame] | 23 | static inline void spill_registers(void) |
| 24 | { |
| 25 | unsigned int a0, ps; |
| 26 | |
| 27 | __asm__ __volatile__ ( |
| 28 | "movi a14, " __stringify(PS_EXCM_BIT | LOCKLEVEL) "\n\t" |
| 29 | "mov a12, a0\n\t" |
| 30 | "rsr a13, sar\n\t" |
| 31 | "xsr a14, ps\n\t" |
| 32 | "movi a0, _spill_registers\n\t" |
| 33 | "rsync\n\t" |
| 34 | "callx0 a0\n\t" |
| 35 | "mov a0, a12\n\t" |
| 36 | "wsr a13, sar\n\t" |
| 37 | "wsr a14, ps\n\t" |
| 38 | : : "a" (&a0), "a" (&ps) |
| 39 | #if defined(CONFIG_FRAME_POINTER) |
| 40 | : "a2", "a3", "a4", "a11", "a12", "a13", "a14", "a15", |
| 41 | #else |
| 42 | : "a2", "a3", "a4", "a7", "a11", "a12", "a13", "a14", "a15", |
| 43 | #endif |
| 44 | "memory"); |
| 45 | } |
| 46 | |
| Max Filippov | 28570e8 | 2012-11-19 08:30:15 +0400 | [diff] [blame] | 47 | #endif /* _XTENSA_TRAPS_H */ |