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| author | Vineet Gupta <vgupta@synopsys.com> | 2017-06-02 11:49:10 -0700 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2017-08-28 15:17:36 -0700 |
| commit | 64f42cec84deb32fdaf24649481c72fcd7800dc1 (patch) | |
| tree | bd75a5d0e9f965fbc98e23310dd8fcbba497c97a /arch/arc | |
| parent | 1112c3b2ce5281a7118606648bb8cc010b2499ca (diff) | |
| download | linux-64f42cec84deb32fdaf24649481c72fcd7800dc1.tar.gz linux-64f42cec84deb32fdaf24649481c72fcd7800dc1.tar.bz2 linux-64f42cec84deb32fdaf24649481c72fcd7800dc1.zip | |
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 <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/irqflags-arcv2.h | 3 | ||||
| -rw-r--r-- | arch/arc/include/asm/irqflags-compact.h | 2 | ||||
| -rw-r--r-- | 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); /* |