110 lines
4.7 KiB
C
110 lines
4.7 KiB
C
/**************************************************************************/
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/* Copyright (c) Cadence Design Systems, Inc. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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/**************************************************************************/
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/* */
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/* DESCRIPTION */
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/* */
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/* Xtensa overlay manager OS hooks for ThreadX. XEA2 only. */
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/* */
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/* RELEASE HISTORY */
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/* */
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/* DATE NAME DESCRIPTION */
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/* */
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/* 12-31-2020 Cadence Design Systems Initial Version 6.1.3 */
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/* */
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/**************************************************************************/
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#ifdef XT_USE_OVLY
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#include <xtensa/overlay.h>
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#include "tx_api.h"
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/* Required to work around a bug in the overlay header. */
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#ifdef XT_DISABLE_OVERLAYS
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#undef xt_overlay_fatal_error
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#define xt_overlay_fatal_error(id)
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#endif
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/* Mutex object that controls access to the overlay. Currently only one
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* overlay region is supported so one mutex suffices.
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*/
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static TX_MUTEX xt_overlay_mutex;
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/**************************************************************************/
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/* This function should be overridden to provide OS specific init such */
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/* as the creation of a mutex lock that can be used for overlay locking. */
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/* Typically this mutex would be set up with priority inheritance. See */
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/* overlay manager documentation for more details. */
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/**************************************************************************/
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void
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xt_overlay_init_os(void)
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{
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/* Create the mutex for overlay access. Priority inheritance is
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* required.
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*/
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UINT status =
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tx_mutex_create (&xt_overlay_mutex, "xt_overlay_lock", TX_INHERIT);
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if (status != TX_SUCCESS) {
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xt_overlay_fatal_error (-1);
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}
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}
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/**************************************************************************/
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/* This function locks access to shared overlay resources, typically */
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/* by acquiring a mutex. */
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/**************************************************************************/
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void
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xt_overlay_lock(void)
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{
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UINT status = tx_mutex_get (&xt_overlay_mutex, TX_WAIT_FOREVER);
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if (status != TX_SUCCESS) {
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xt_overlay_fatal_error (-1);
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}
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}
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/**************************************************************************/
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/* This function releases access to shared overlay resources, typically */
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/* by unlocking a mutex. */
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/**************************************************************************/
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void
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xt_overlay_unlock(void)
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{
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UINT status = tx_mutex_put (&xt_overlay_mutex);
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if (status != TX_SUCCESS) {
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xt_overlay_fatal_error (-1);
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}
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}
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#endif /* XT_USE_OVLY */
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