From 64f42cec84deb32fdaf24649481c72fcd7800dc1 Mon Sep 17 00:00:00 2001 From: Vineet Gupta Date: Fri, 2 Jun 2017 11:49:10 -0700 Subject: [PATCH] ARC: create cpu specific version of arch_cpu_idle() 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 --- arch/arc/include/asm/irqflags-arcv2.h | 3 --- arch/arc/include/asm/irqflags-compact.h | 2 -- arch/arc/kernel/process.c | 18 ++++++++++++++++-- 3 files changed, 16 insertions(+), 7 deletions(-) diff --git a/arch/arc/include/asm/irqflags-arcv2.h b/arch/arc/include/asm/irqflags-arcv2.h index a64c447b0337..8a4f77ea3238 100644 --- a/arch/arc/include/asm/irqflags-arcv2.h +++ b/arch/arc/include/asm/irqflags-arcv2.h @@ -47,9 +47,6 @@ #define ISA_INIT_STATUS_BITS (STATUS_IE_MASK | STATUS_AD_MASK | \ (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__ /* diff --git a/arch/arc/include/asm/irqflags-compact.h b/arch/arc/include/asm/irqflags-compact.h index 4c6eed80cd8b..fcb80171fc34 100644 --- a/arch/arc/include/asm/irqflags-compact.h +++ b/arch/arc/include/asm/irqflags-compact.h @@ -43,8 +43,6 @@ #define ISA_INIT_STATUS_BITS STATUS_IE_MASK -#define ISA_SLEEP_ARG 0x3 - #ifndef __ASSEMBLY__ /****************************************************************** diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c index 2a018de6d6cd..fd5b2190a957 100644 --- a/arch/arc/kernel/process.c +++ b/arch/arc/kernel/process.c @@ -79,15 +79,29 @@ 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 */ +} + +#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); /* -- 2.20.1