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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSTestSuites
*
* @brief This source file contains the implementation of CallWithinISR(),
* CallWithinISRSubmit(), and CallWithinISRWait().
*/
/*
* Copyright (C) 2021 embedded brains GmbH (http://www.embedded-brains.de)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "tx-support.h"
#include <rtems/sysinit.h>
#include <rtems/score/chainimpl.h>
#include <bsp.h>
/* Some target architectures need this variable for <tm27.h> */
uint32_t Interrupt_nest;
#define _RTEMS_TMTEST27
#include <tm27.h>
typedef struct {
Chain_Control pending;
RTEMS_INTERRUPT_LOCK_MEMBER( lock )
} CallWithinISRContext;
static CallWithinISRContext CallWithinISRInstance = {
#if defined( RTEMS_SMP )
.lock = RTEMS_INTERRUPT_LOCK_INITIALIZER( "CallWithinISR" ),
#endif
.pending = CHAIN_INITIALIZER_EMPTY( CallWithinISRInstance.pending )
};
static void CallWithinISRHandler( rtems_vector_number vector )
{
CallWithinISRContext *ctx;
(void) vector;
ctx = &CallWithinISRInstance;
Clear_tm27_intr();
while ( true ) {
rtems_interrupt_lock_context lock_context;
CallWithinISRRequest *request;
rtems_interrupt_lock_acquire( &ctx->lock, &lock_context );
request = (CallWithinISRRequest *)
_Chain_Get_unprotected( &ctx->pending );
rtems_interrupt_lock_release( &ctx->lock, &lock_context );
if ( request == NULL ) {
break;
}
( *request->handler )( request->arg );
_Atomic_Store_uint( &request->done, 1, ATOMIC_ORDER_RELEASE );
}
}
void CallWithinISR( void ( *handler )( void * ), void *arg )
{
CallWithinISRRequest request;
request.handler = handler;
request.arg = arg;
CallWithinISRSubmit( &request );
CallWithinISRWait( &request );
}
void CallWithinISRSubmit( CallWithinISRRequest *request )
{
CallWithinISRContext *ctx;
rtems_interrupt_lock_context lock_context;
ctx = &CallWithinISRInstance;
rtems_interrupt_lock_acquire( &ctx->lock, &lock_context );
_Atomic_Store_uint( &request->done, 0, ATOMIC_ORDER_RELAXED );
_Chain_Initialize_node( &request->node );
_Chain_Append_unprotected( &ctx->pending, &request->node );
rtems_interrupt_lock_release( &ctx->lock, &lock_context );
Cause_tm27_intr();
}
void CallWithinISRWait( const CallWithinISRRequest *request )
{
while ( _Atomic_Load_uint( &request->done, ATOMIC_ORDER_ACQUIRE ) == 0 ) {
/* Wait */
}
}
static void CallWithinISRInitialize( void )
{
Install_tm27_vector( CallWithinISRHandler );
}
RTEMS_SYSINIT_ITEM(
CallWithinISRInitialize,
RTEMS_SYSINIT_DEVICE_DRIVERS,
RTEMS_SYSINIT_ORDER_MIDDLE
);
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