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arch: tiva: Introduce tiva_idle.c

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Masayuki Ishikawa 2020-05-24 20:04:49 +09:00 committed by Alan Carvalho de Assis
parent dd61d3d9f9
commit 36c1f7ccf0
2 changed files with 63 additions and 1 deletions
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2
arch/arm/src/tiva/Make.defs
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@ -59,7 +59,7 @@ ifeq ($(CONFIG_ARM_SEMIHOSTING_HOSTFS),y)
endif endif
ifneq ($(CONFIG_ARCH_IDLE_CUSTOM),y) ifneq ($(CONFIG_ARCH_IDLE_CUSTOM),y)
CMN_CSRCS += arm_idle.c CMN_CSRCS += tiva_idle.c
endif endif
ifeq ($(CONFIG_ARMV7M_LAZYFPU),y) ifeq ($(CONFIG_ARMV7M_LAZYFPU),y)

62
arch/arm/src/tiva/common/tiva_idle.c Normal file
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@ -0,0 +1,62 @@
/****************************************************************************
* arch/arm/src/tiva/common/tiva_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 "arm_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
}