sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

arch: imx6: Add imx_idle.c

Browse Source 
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
This commit is contained in:
Masayuki Ishikawa 2020-02-20 09:35:32 +09:00 committed by patacongo
parent f38f39d410
commit 6ccf08a778
2 changed files with 62 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm/src/imx6/Make.defs
View File

@ -76,7 +76,7 @@ CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c arm_syscall.c
CMN_CSRCS += arm_unblocktask.c arm_undefinedinsn.c
ifneq ($(CONFIG_ARCH_IDLE_CUSTOM),y)
CMN_CSRCS += up_idle.c
CMN_CSRCS += imx_idle.c
endif
ifeq ($(CONFIG_SMP),y)

61
arch/arm/src/imx6/imx_idle.c Normal file
View File

@ -0,0 +1,61 @@
/****************************************************************************
* arch/arm/src/imx6/imx_idle.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/arch.h>
#include "up_internal.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_idle
*
* Description:
* up_idle() is the logic that will be executed when their is no other
* ready-to-run task. This is processor idle time and will continue until
* some interrupt occurs to cause a context switch from the idle task.
*
* Processing in this state may be processor-specific. e.g., this is where
* power management operations might be performed.
*
****************************************************************************/
void up_idle(void)
{
#if defined(CONFIG_SUPPRESS_INTERRUPTS) || defined(CONFIG_SUPPRESS_TIMER_INTS)
/* If the system is idle and there are no timer interrupts, then process
* "fake" timer interrupts. Hopefully, something will wake up.
*/
nxsched_process_timer();
#else
/* Sleep until an interrupt occurs to save power */
asm("WFI");
#endif
}