projects / mirror_ubuntu-eoan-kernel.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__ ( |
| 77d6273e | 28 | " call8 1f\n" |
| e2fd1374 MF |
29 | " _j 2f\n" |
| 30 | " retw\n" | |
| 31 | " .align 4\n" | |
| 32 | "1:\n" | |
| 77d6273e MF |
33 | #if XCHAL_NUM_AREGS == 32 |
| 34 | " _entry a1, 32\n" | |
| 35 | " addi a8, a0, 3\n" | |
| 36 | " _entry a1, 16\n" | |
| 37 | " mov a12, a12\n" | |
| 38 | " retw\n" | |
| 39 | #else | |
| e2fd1374 | 40 | " _entry a1, 48\n" |
| 77d6273e MF |
41 | " call12 1f\n" |
| 42 | " retw\n" | |
| 43 | " .align 4\n" | |
| 44 | "1:\n" | |
| 45 | " .rept (" __stringify(XCHAL_NUM_AREGS) " - 16) / 12\n" | |
| e2fd1374 MF |
46 | " _entry a1, 48\n" |
| 47 | " mov a12, a0\n" | |
| 48 | " .endr\n" | |
| 77d6273e | 49 | " _entry a1, 16\n" |
| e2fd1374 | 50 | #if XCHAL_NUM_AREGS % 12 == 0 |
| e2fd1374 | 51 | " mov a12, a12\n" |
| 77d6273e | 52 | #elif XCHAL_NUM_AREGS % 12 == 4 |
| e2fd1374 | 53 | " mov a4, a4\n" |
| 77d6273e MF |
54 | #elif XCHAL_NUM_AREGS % 12 == 8 |
| 55 | " mov a8, a8\n" | |
| e2fd1374 MF |
56 | #endif |
| 57 | " retw\n" | |
| 77d6273e | 58 | #endif |
| e2fd1374 | 59 | "2:\n" |
| 77d6273e | 60 | : : : "a8", "a9", "memory"); |
| 2d6f82fe | 61 | #else |
| e2fd1374 MF |
62 | __asm__ __volatile__ ( |
| 63 | " mov a12, a12\n" | |
| 64 | : : : "memory"); | |
| 2d6f82fe | 65 | #endif |
| 2d6f82fe MF |
66 | } |
| 67 | ||
| 28570e8d | 68 | #endif /* _XTENSA_TRAPS_H */ |