diff options
Diffstat (limited to 'arch/xtensa/include/asm/traps.h')
| -rw-r--r-- | arch/xtensa/include/asm/traps.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/traps.h b/arch/xtensa/include/asm/traps.h index 54f70440185..677bfcf4ee5 100644 --- a/arch/xtensa/include/asm/traps.h +++ b/arch/xtensa/include/asm/traps.h @@ -19,5 +19,41 @@ */ extern void * __init trap_set_handler(int cause, void *handler); extern void do_unhandled(struct pt_regs *regs, unsigned long exccause); +void secondary_trap_init(void); + +static inline void spill_registers(void) +{ +#if XCHAL_NUM_AREGS > 16 + __asm__ __volatile__ ( + " call12 1f\n" + " _j 2f\n" + " retw\n" + " .align 4\n" + "1:\n" + " _entry a1, 48\n" + " addi a12, a0, 3\n" +#if XCHAL_NUM_AREGS > 32 + " .rept (" __stringify(XCHAL_NUM_AREGS) " - 32) / 12\n" + " _entry a1, 48\n" + " mov a12, a0\n" + " .endr\n" +#endif + " _entry a1, 48\n" +#if XCHAL_NUM_AREGS % 12 == 0 + " mov a8, a8\n" +#elif XCHAL_NUM_AREGS % 12 == 4 + " mov a12, a12\n" +#elif XCHAL_NUM_AREGS % 12 == 8 + " mov a4, a4\n" +#endif + " retw\n" + "2:\n" + : : : "a12", "a13", "memory"); +#else + __asm__ __volatile__ ( + " mov a12, a12\n" + : : : "memory"); +#endif +} #endif /* _XTENSA_TRAPS_H */ |