* arch/arm/src/armv8-r/arm_smpcall.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 <stdint.h>
#include <assert.h>
#include <nuttx/arch.h>
#include <nuttx/sched.h>
#include <nuttx/spinlock.h>
#include <nuttx/sched_note.h>
#include "arm_internal.h"
#include "gic.h"
#include "sched/sched.h"
#ifndef CONFIG_UP
* Private Data
****************************************************************************/
* Public Functions
****************************************************************************/
* Name: arm_smp_sched_handler
*
* Description:
* This is the handler for sched.
*
* 1. It saves the current task state at the head of the current assigned
* task list.
* 2. It process g_delivertasks
* 3. Returns from interrupt, restoring the state of the new task at the
* head of the ready to run list.
*
* Input Parameters:
* Standard interrupt handling
*
* Returned Value:
* Zero on success; a negated errno value on failure.
*
****************************************************************************/
#ifdef CONFIG_SMP
int arm_smp_sched_handler(int irq, void *context, void *arg)
{
nxsched_process_delivered(this_cpu());
return OK;
}
* Name: up_send_smp_sched
*
* Description:
* pause task execution on the CPU
* check whether there are tasks delivered to specified cpu
* and try to run them.
*
* Input Parameters:
* cpu - The index of the CPU to be paused.
*
* Returned Value:
* Zero on success; a negated errno value on failure.
*
* Assumptions:
* Called from within a critical section;
*
****************************************************************************/
int up_send_smp_sched(int cpu)
{
arm_cpu_sgi(GIC_SMP_SCHED, (1 << cpu));
return OK;
}
#endif
* Name: up_send_smp_call
*
* Description:
* Send smp call to target cpu.
*
* Input Parameters:
* cpuset - The set of CPUs to receive the SGI.
*
* Returned Value:
* None.
*
****************************************************************************/
void up_send_smp_call(cpu_set_t cpuset)
{
up_trigger_irq(GIC_SMP_CALL, cpuset);
}
#endif