| 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 | { |
| Max Filippov | c9f8722 | 2014-01-22 08:04:43 +0400 | [diff] [blame] | 25 | #if XCHAL_NUM_AREGS > 16 |
| Max Filippov | 2d6f82f | 2013-02-03 05:39:22 +0400 | [diff] [blame] | 26 | __asm__ __volatile__ ( |
| Max Filippov | c9f8722 | 2014-01-22 08:04:43 +0400 | [diff] [blame] | 27 | " call12 1f\n" |
| 28 | " _j 2f\n" |
| 29 | " retw\n" |
| 30 | " .align 4\n" |
| 31 | "1:\n" |
| 32 | " _entry a1, 48\n" |
| 33 | " addi a12, a0, 3\n" |
| 34 | #if XCHAL_NUM_AREGS > 32 |
| 35 | " .rept (" __stringify(XCHAL_NUM_AREGS) " - 32) / 12\n" |
| 36 | " _entry a1, 48\n" |
| 37 | " mov a12, a0\n" |
| 38 | " .endr\n" |
| Max Filippov | 2d6f82f | 2013-02-03 05:39:22 +0400 | [diff] [blame] | 39 | #endif |
| Max Filippov | c9f8722 | 2014-01-22 08:04:43 +0400 | [diff] [blame] | 40 | " _entry a1, 48\n" |
| 41 | #if XCHAL_NUM_AREGS % 12 == 0 |
| 42 | " mov a8, a8\n" |
| 43 | #elif XCHAL_NUM_AREGS % 12 == 4 |
| 44 | " mov a12, a12\n" |
| 45 | #elif XCHAL_NUM_AREGS % 12 == 8 |
| 46 | " mov a4, a4\n" |
| 47 | #endif |
| 48 | " retw\n" |
| 49 | "2:\n" |
| 50 | : : : "a12", "a13", "memory"); |
| 51 | #else |
| 52 | __asm__ __volatile__ ( |
| 53 | " mov a12, a12\n" |
| 54 | : : : "memory"); |
| 55 | #endif |
| Max Filippov | 2d6f82f | 2013-02-03 05:39:22 +0400 | [diff] [blame] | 56 | } |
| 57 | |
| Max Filippov | 28570e8 | 2012-11-19 08:30:15 +0400 | [diff] [blame] | 58 | #endif /* _XTENSA_TRAPS_H */ |