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ARC: create cpu specific version of arch_cpu_idle()

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This paves way for creating a 3rd variant needed for NPS ARC700 without
littering ifdey'ery all over the place

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2017-06-02 11:49:10 -07:00
parent 1112c3b2ce
commit 64f42cec84
3 changed files with 16 additions and 7 deletions
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3
arch/arc/include/asm/irqflags-arcv2.h
View file

@ -47,9 +47,6 @@
#define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \ #define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \
(ARCV2_IRQ_DEF_PRIO << 1)) (ARCV2_IRQ_DEF_PRIO << 1))
/* SLEEP needs default irq priority (<=) which can interrupt the doze */
#define ISA_SLEEP_ARG (0x10 | ARCV2_IRQ_DEF_PRIO)
#ifndef __ASSEMBLY__ #ifndef __ASSEMBLY__
/* /*

2
arch/arc/include/asm/irqflags-compact.h
View file

@ -43,8 +43,6 @@
#define ISA_INIT_STATUS_BITS STATUS_IE_MASK #define ISA_INIT_STATUS_BITS STATUS_IE_MASK
#define ISA_SLEEP_ARG 0x3
#ifndef __ASSEMBLY__ #ifndef __ASSEMBLY__
/****************************************************************** /******************************************************************

18
arch/arc/kernel/process.c
View file

@ -79,15 +79,29 @@ SYSCALL_DEFINE3(arc_usr_cmpxchg, int *, uaddr, int, expected, int, new)
return uval; return uval;
} }
#ifdef CONFIG_ISA_ARCV2
void arch_cpu_idle(void) 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__( __asm__ __volatile__(
"sleep %0 \n" "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 */
} }
#else
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); asmlinkage void ret_from_fork(void);
/* /*