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https://github.com/brain-hackers/u-boot-brain
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234 lines
5.6 KiB
C
234 lines
5.6 KiB
C
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/**
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* @file IxOsalOsSemaphore.c (eCos)
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*
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* @brief Implementation for semaphore and mutex.
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*
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*
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* @par
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* IXP400 SW Release version 1.5
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*
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* -- Copyright Notice --
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*
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* @par
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* Copyright 2001-2005, Intel Corporation.
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* All rights reserved.
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*
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* @par
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* @par
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @par
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* -- End of Copyright Notice --
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*/
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#include "IxOsal.h"
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#include "IxNpeMhReceive_p.h"
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/* Define a large number */
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#define IX_OSAL_MAX_LONG (0x7FFFFFFF)
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/* Max timeout in MS, used to guard against possible overflow */
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#define IX_OSAL_MAX_TIMEOUT_MS (IX_OSAL_MAX_LONG/HZ)
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PUBLIC IX_STATUS
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ixOsalSemaphoreInit (IxOsalSemaphore * sid, UINT32 start_value)
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{
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diag_printf("%s called\n", __FUNCTION__);
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return IX_SUCCESS;
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}
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/**
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* DESCRIPTION: If the semaphore is 'empty', the calling thread is blocked.
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* If the semaphore is 'full', it is taken and control is returned
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* to the caller. If the time indicated in 'timeout' is reached,
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* the thread will unblock and return an error indication. If the
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* timeout is set to 'IX_OSAL_WAIT_NONE', the thread will never block;
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* if it is set to 'IX_OSAL_WAIT_FOREVER', the thread will block until
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* the semaphore is available.
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*
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*
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*/
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PUBLIC IX_STATUS
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ixOsalSemaphoreWait (IxOsalOsSemaphore * sid, INT32 timeout)
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{
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diag_printf("%s called\n", __FUNCTION__);
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return IX_SUCCESS;
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}
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/*
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* Attempt to get semaphore, return immediately,
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* no error info because users expect some failures
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* when using this API.
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*/
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PUBLIC IX_STATUS
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ixOsalSemaphoreTryWait (IxOsalSemaphore * sid)
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{
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diag_printf("%s called\n", __FUNCTION__);
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return IX_FAIL;
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}
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/**
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*
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* DESCRIPTION: This function causes the next available thread in the pend queue
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* to be unblocked. If no thread is pending on this semaphore, the
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* semaphore becomes 'full'.
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*/
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PUBLIC IX_STATUS
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ixOsalSemaphorePost (IxOsalSemaphore * sid)
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{
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diag_printf("%s called\n", __FUNCTION__);
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return IX_SUCCESS;
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}
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PUBLIC IX_STATUS
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ixOsalSemaphoreGetValue (IxOsalSemaphore * sid, UINT32 * value)
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{
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diag_printf("%s called\n", __FUNCTION__);
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return IX_FAIL;
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}
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PUBLIC IX_STATUS
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ixOsalSemaphoreDestroy (IxOsalSemaphore * sid)
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{
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diag_printf("%s called\n", __FUNCTION__);
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return IX_FAIL;
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}
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/****************************
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* Mutex
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****************************/
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static void drv_mutex_init(IxOsalMutex *mutex)
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{
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*mutex = 0;
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}
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static void drv_mutex_destroy(IxOsalMutex *mutex)
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{
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*mutex = -1;
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}
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static int drv_mutex_trylock(IxOsalMutex *mutex)
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{
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int result = TRUE;
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if (*mutex == 1)
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result = FALSE;
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return result;
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}
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static void drv_mutex_unlock(IxOsalMutex *mutex)
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{
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if (*mutex == 1)
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printf("Trying to unlock unlocked mutex!");
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*mutex = 0;
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}
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PUBLIC IX_STATUS
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ixOsalMutexInit (IxOsalMutex * mutex)
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{
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drv_mutex_init(mutex);
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return IX_SUCCESS;
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}
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PUBLIC IX_STATUS
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ixOsalMutexLock (IxOsalMutex * mutex, INT32 timeout)
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{
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int tries;
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if (timeout == IX_OSAL_WAIT_NONE) {
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if (drv_mutex_trylock(mutex))
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return IX_SUCCESS;
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else
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return IX_FAIL;
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}
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tries = (timeout * 1000) / 50;
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while (1) {
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if (drv_mutex_trylock(mutex))
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return IX_SUCCESS;
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if (timeout != IX_OSAL_WAIT_FOREVER && tries-- <= 0)
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break;
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udelay(50);
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}
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return IX_FAIL;
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}
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PUBLIC IX_STATUS
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ixOsalMutexUnlock (IxOsalMutex * mutex)
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{
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drv_mutex_unlock(mutex);
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return IX_SUCCESS;
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}
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/*
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* Attempt to get mutex, return immediately,
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* no error info because users expect some failures
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* when using this API.
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*/
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PUBLIC IX_STATUS
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ixOsalMutexTryLock (IxOsalMutex * mutex)
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{
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if (drv_mutex_trylock(mutex))
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return IX_SUCCESS;
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return IX_FAIL;
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}
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PUBLIC IX_STATUS
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ixOsalMutexDestroy (IxOsalMutex * mutex)
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{
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drv_mutex_destroy(mutex);
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return IX_SUCCESS;
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}
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PUBLIC IX_STATUS
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ixOsalFastMutexInit (IxOsalFastMutex * mutex)
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{
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return ixOsalMutexInit(mutex);
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}
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PUBLIC IX_STATUS ixOsalFastMutexTryLock(IxOsalFastMutex *mutex)
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{
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return ixOsalMutexTryLock(mutex);
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}
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PUBLIC IX_STATUS
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ixOsalFastMutexUnlock (IxOsalFastMutex * mutex)
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{
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return ixOsalMutexUnlock(mutex);
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}
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PUBLIC IX_STATUS
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ixOsalFastMutexDestroy (IxOsalFastMutex * mutex)
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{
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return ixOsalMutexDestroy(mutex);
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}
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