projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 28570e8d MF |
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); | |
| f615136c | 22 | void secondary_trap_init(void); |
| 28570e8d | 23 | |
| 2d6f82fe MF |
24 | static inline void spill_registers(void) |
| 25 | { | |
| e2fd1374 | 26 | #if XCHAL_NUM_AREGS > 16 |
| 2d6f82fe | 27 | __asm__ __volatile__ ( |
| e2fd1374 MF |
28 | " call12 1f\n" |
| 29 | " _j 2f\n" | |
| 30 | " retw\n" | |
| 31 | " .align 4\n" | |
| 32 | "1:\n" | |
| 33 | " _entry a1, 48\n" | |
| 34 | " addi a12, a0, 3\n" | |
| 35 | #if XCHAL_NUM_AREGS > 32 | |
| 36 | " .rept (" __stringify(XCHAL_NUM_AREGS) " - 32) / 12\n" | |
| 37 | " _entry a1, 48\n" | |
| 38 | " mov a12, a0\n" | |
| 39 | " .endr\n" | |
| 40 | #endif | |
| 41 | " _entry a1, 48\n" | |
| 42 | #if XCHAL_NUM_AREGS % 12 == 0 | |
| 43 | " mov a8, a8\n" | |
| 44 | #elif XCHAL_NUM_AREGS % 12 == 4 | |
| 45 | " mov a12, a12\n" | |
| 46 | #elif XCHAL_NUM_AREGS % 12 == 8 | |
| 47 | " mov a4, a4\n" | |
| 48 | #endif | |
| 49 | " retw\n" | |
| 50 | "2:\n" | |
| 51 | : : : "a12", "a13", "memory"); | |
| 2d6f82fe | 52 | #else |
| e2fd1374 MF |
53 | __asm__ __volatile__ ( |
| 54 | " mov a12, a12\n" | |
| 55 | : : : "memory"); | |
| 2d6f82fe | 56 | #endif |
| 2d6f82fe MF |
57 | } |
| 58 | ||
| 28570e8d | 59 | #endif /* _XTENSA_TRAPS_H */ |