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nios2: implement nano_cpu_idle and nano_cpu_atomic_idle

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Nios II does not have a power saving instruction, so there is nothing
to really do here other than ensure that interrupts are in the correct
state when leaving nano_cpu_atomic_idle().

Change-Id: I664c7542dc2fc1795a453d35e183a737dcb20c38
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2016-06-07 10:26:57 -07:00 • committed by Anas Nashif
commit 45cff183a2
1 changed files with 7 additions and 2 deletions
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9
arch/nios2/core/cpu_idle.c
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@ -29,7 +29,9 @@
*/ */
void nano_cpu_idle(void) void nano_cpu_idle(void)
{ {
/* STUB */ /* Do nothing but return to the caller. This CPU does not have any
* kind of power saving instruction.
*/
} }
/** /**
@ -55,6 +57,9 @@ void nano_cpu_idle(void)
*/ */
void nano_cpu_atomic_idle(unsigned int key) void nano_cpu_atomic_idle(unsigned int key)
{ {
/* STUB */ /* Do nothing but restore IRQ state. This CPU does not have any
* kind of power saving instruction.
*/
irq_unlock(key);
} }