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/**************************************************************************/
/* Copyright (c) Cadence Design Systems, Inc. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
/**************************************************************************/
/* */
/* DESCRIPTION */
/* */
/* Xtensa overlay manager OS hooks for ThreadX. XEA2 only. */
/* */
/**************************************************************************/
#ifdef XT_USE_OVLY
#include <xtensa/overlay.h>
#include "tx_api.h"
/* Required to work around a bug in the overlay header. */
#ifdef XT_DISABLE_OVERLAYS
#undef xt_overlay_fatal_error
#define xt_overlay_fatal_error(id)
#endif
/* Mutex object that controls access to the overlay. Currently only one
* overlay region is supported so one mutex suffices.
*/
static TX_MUTEX xt_overlay_mutex;
/**************************************************************************/
/* This function should be overridden to provide OS specific init such */
/* as the creation of a mutex lock that can be used for overlay locking. */
/* Typically this mutex would be set up with priority inheritance. See */
/* overlay manager documentation for more details. */
/**************************************************************************/
void
xt_overlay_init_os(void)
{
/* Create the mutex for overlay access. Priority inheritance is
* required.
*/
UINT status =
tx_mutex_create (&xt_overlay_mutex, "xt_overlay_lock", TX_INHERIT);
if (status != TX_SUCCESS) {
xt_overlay_fatal_error (-1);
}
}
/**************************************************************************/
/* This function locks access to shared overlay resources, typically */
/* by acquiring a mutex. */
/**************************************************************************/
void
xt_overlay_lock(void)
{
UINT status = tx_mutex_get (&xt_overlay_mutex, TX_WAIT_FOREVER);
if (status != TX_SUCCESS) {
xt_overlay_fatal_error (-1);
}
}
/**************************************************************************/
/* This function releases access to shared overlay resources, typically */
/* by unlocking a mutex. */
/**************************************************************************/
void
xt_overlay_unlock(void)
{
UINT status = tx_mutex_put (&xt_overlay_mutex);
if (status != TX_SUCCESS) {
xt_overlay_fatal_error (-1);
}
}
#endif /* XT_USE_OVLY */
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