778f050102
Gregory Nutt has submitted the SGA and we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
146 lines
4.4 KiB
C
146 lines
4.4 KiB
C
/****************************************************************************
|
|
* arch/xtensa/src/common/xtensa_releasepending.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 <sched.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/arch.h>
|
|
#include <nuttx/sched.h>
|
|
#include <arch/chip/core-isa.h>
|
|
|
|
#include "sched/sched.h"
|
|
#include "group/group.h"
|
|
#include "xtensa.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: up_release_pending
|
|
*
|
|
* Description:
|
|
* Release and ready-to-run tasks that have
|
|
* collected in the pending task list. This can call a
|
|
* context switch if a new task is placed at the head of
|
|
* the ready to run list.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void up_release_pending(void)
|
|
{
|
|
struct tcb_s *rtcb = this_task();
|
|
|
|
sinfo("From TCB=%p\n", rtcb);
|
|
|
|
/* Merge the g_pendingtasks list into the ready-to-run task list */
|
|
|
|
/* sched_lock(); */
|
|
|
|
if (nxsched_merge_pending())
|
|
{
|
|
/* The currently active task has changed! We will need to
|
|
* switch contexts.
|
|
*/
|
|
|
|
/* Update scheduler parameters */
|
|
|
|
nxsched_suspend_scheduler(rtcb);
|
|
|
|
/* Are we operating in interrupt context? */
|
|
|
|
if (CURRENT_REGS)
|
|
{
|
|
/* Yes, then we have to do things differently.
|
|
* Just copy the CURRENT_REGS into the OLD rtcb.
|
|
*/
|
|
|
|
xtensa_savestate(rtcb->xcp.regs);
|
|
|
|
/* Restore the exception context of the rtcb at the (new) head
|
|
* of the ready-to-run task list.
|
|
*/
|
|
|
|
rtcb = this_task();
|
|
|
|
/* Update scheduler parameters */
|
|
|
|
nxsched_resume_scheduler(rtcb);
|
|
|
|
/* Then switch contexts. Any necessary address environment
|
|
* changes will be made when the interrupt returns.
|
|
*/
|
|
|
|
xtensa_restorestate(rtcb->xcp.regs);
|
|
}
|
|
|
|
/* Copy the exception context into the TCB of the task that
|
|
* was currently active. if up_saveusercontext returns a non-zero
|
|
* value, then this is really the previously running task
|
|
* restarting!
|
|
*/
|
|
|
|
else if (!xtensa_context_save(rtcb->xcp.regs))
|
|
{
|
|
#if XCHAL_CP_NUM > 0
|
|
/* Save the co-processor state in in the suspended thread's co-
|
|
* processor save area.
|
|
*/
|
|
|
|
xtensa_coproc_savestate(&rtcb->xcp.cpstate);
|
|
#endif
|
|
/* Restore the exception context of the rtcb at the (new) head
|
|
* of the ready-to-run task list.
|
|
*/
|
|
|
|
rtcb = this_task();
|
|
|
|
#if XCHAL_CP_NUM > 0
|
|
/* Set up the co-processor state for the newly started thread. */
|
|
|
|
xtensa_coproc_restorestate(&rtcb->xcp.cpstate);
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARCH_ADDRENV
|
|
/* Make sure that the address environment for the previously
|
|
* running task is closed down gracefully (data caches dump,
|
|
* MMU flushed) and set up the address environment for the new
|
|
* thread at the head of the ready-to-run list.
|
|
*/
|
|
|
|
group_addrenv(rtcb);
|
|
#endif
|
|
/* Update scheduler parameters */
|
|
|
|
nxsched_resume_scheduler(rtcb);
|
|
|
|
/* Then switch contexts */
|
|
|
|
xtensa_context_restore(rtcb->xcp.regs);
|
|
}
|
|
}
|
|
}
|