diff options
Diffstat (limited to 'arch/arc/kernel/process.c')
| -rw-r--r-- | arch/arc/kernel/process.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c index 2a018de6d6cd..5ac3b547453f 100644 --- a/arch/arc/kernel/process.c +++ b/arch/arc/kernel/process.c @@ -79,15 +79,40 @@ done: return uval; } +#ifdef CONFIG_ISA_ARCV2 + void arch_cpu_idle(void) { - /* sleep, but enable all interrupts before committing */ + /* Re-enable interrupts <= default irq priority before commiting SLEEP */ + const unsigned int arg = 0x10 | ARCV2_IRQ_DEF_PRIO; + __asm__ __volatile__( "sleep %0 \n" : - :"I"(ISA_SLEEP_ARG)); /* can't be "r" has to be embedded const */ + :"I"(arg)); /* can't be "r" has to be embedded const */ +} + +#elif defined(CONFIG_EZNPS_MTM_EXT) /* ARC700 variant in NPS */ + +void arch_cpu_idle(void) +{ + /* only the calling HW thread needs to sleep */ + __asm__ __volatile__( + ".word %0 \n" + : + :"i"(CTOP_INST_HWSCHD_WFT_IE12)); +} + +#else /* ARC700 */ + +void arch_cpu_idle(void) +{ + /* sleep, but enable both set E1/E2 (levels of interrutps) before committing */ + __asm__ __volatile__("sleep 0x3 \n"); } +#endif + asmlinkage void ret_from_fork(void); /* @@ -209,6 +234,10 @@ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long usp) */ regs->status32 = STATUS_U_MASK | STATUS_L_MASK | ISA_INIT_STATUS_BITS; +#ifdef CONFIG_EZNPS_MTM_EXT + regs->eflags = 0; +#endif + /* bogus seed values for debugging */ regs->lp_start = 0x10; regs->lp_end = 0x80; |