aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arc/kernel/process.c
diff options
context:
space:
mode:
authorVineet Gupta <vgupta@synopsys.com>2017-06-02 11:49:10 -0700
committerVineet Gupta <vgupta@synopsys.com>2017-08-28 15:17:36 -0700
commit64f42cec84deb32fdaf24649481c72fcd7800dc1 (patch)
treebd75a5d0e9f965fbc98e23310dd8fcbba497c97a /arch/arc/kernel/process.c
parentARC: [plat-eznps] spinlock aware for MTM (diff)
downloadlinux-dev-64f42cec84deb32fdaf24649481c72fcd7800dc1.tar.xz
linux-dev-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 '')
-rw-r--r--arch/arc/kernel/process.c18
1 files changed, 16 insertions, 2 deletions
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);
/*