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+/******************************************************************************
+*
+* (c) Copyright 2010-12 Xilinx, Inc. All rights reserved.
+*
+* This file contains confidential and proprietary information of Xilinx, Inc.
+* and is protected under U.S. and international copyright and other
+* intellectual property laws.
+*
+* DISCLAIMER
+* This disclaimer is not a license and does not grant any rights to the
+* materials distributed herewith. Except as otherwise provided in a valid
+* license issued to you by Xilinx, and to the maximum extent permitted by
+* applicable law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND WITH ALL
+* FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS,
+* IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
+* MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE;
+* and (2) Xilinx shall not be liable (whether in contract or tort, including
+* negligence, or under any other theory of liability) for any loss or damage
+* of any kind or nature related to, arising under or in connection with these
+* materials, including for any direct, or any indirect, special, incidental,
+* or consequential loss or damage (including loss of data, profits, goodwill,
+* or any type of loss or damage suffered as a result of any action brought by
+* a third party) even if such damage or loss was reasonably foreseeable or
+* Xilinx had been advised of the possibility of the same.
+*
+* CRITICAL APPLICATIONS
+* Xilinx products are not designed or intended to be fail-safe, or for use in
+* any application requiring fail-safe performance, such as life-support or
+* safety devices or systems, Class III medical devices, nuclear facilities,
+* applications related to the deployment of airbags, or any other applications
+* that could lead to death, personal injury, or severe property or
+* environmental damage (individually and collectively, "Critical
+* Applications"). Customer assumes the sole risk and liability of any use of
+* Xilinx products in Critical Applications, subject only to applicable laws
+* and regulations governing limitations on product liability.
+*
+* THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE
+* AT ALL TIMES.
+*
+******************************************************************************/
+/****************************************************************************/
+/**
+*
+* @file xscutimer_selftest.c
+*
+* Contains diagnostic self-test functions for the XScuTimer driver.
+*
+* <pre>
+* MODIFICATION HISTORY:
+*
+* Ver Who Date Changes
+* ----- --- -------- ---------------------------------------------
+* 1.00a nm 03/10/10 First release
+* </pre>
+*
+******************************************************************************/
+
+/***************************** Include Files *********************************/
+
+#include "xscutimer.h"
+
+/************************** Constant Definitions *****************************/
+
+#define XSCUTIMER_SELFTEST_VALUE 0xA55AF00F
+
+/**************************** Type Definitions *******************************/
+
+/***************** Macros (Inline Functions) Definitions *********************/
+
+/************************** Function Prototypes ******************************/
+
+/************************** Variable Definitions *****************************/
+
+/****************************************************************************/
+/**
+*
+* Run a self-test on the timer. This test clears the timer enable bit in
+* the control register, writes to the timer load register and verifies the
+* value read back matches the value written and restores the control register
+* and the timer load register.
+*
+* @param InstancePtr is a pointer to the XScuTimer instance.
+*
+* @return
+* - XST_SUCCESS if self-test was successful.
+* - XST_FAILURE if self test was not successful.
+*
+* @note None.
+*
+******************************************************************************/
+int XScuTimer_SelfTest(XScuTimer *InstancePtr)
+{
+ u32 Register;
+ u32 CtrlOrig;
+ u32 LoadOrig;
+
+ /*
+ * Assert to ensure the inputs are valid and the instance has been
+ * initialized.
+ */
+ Xil_AssertNonvoid(InstancePtr != NULL);
+ Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
+
+ /*
+ * Save the contents of the Control Register and stop the timer.
+ */
+ CtrlOrig = XScuTimer_ReadReg(InstancePtr->Config.BaseAddr,
+ XSCUTIMER_CONTROL_OFFSET);
+ Register = CtrlOrig & ~XSCUTIMER_CONTROL_ENABLE_MASK;
+ XScuTimer_WriteReg(InstancePtr->Config.BaseAddr,
+ XSCUTIMER_CONTROL_OFFSET, Register);
+
+ /*
+ * Save the contents of the Load Register.
+ * Load a new test value in the Load Register, read it back and
+ * compare it with the written value.
+ */
+ LoadOrig = XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr,
+ XSCUTIMER_LOAD_OFFSET);
+ XScuTimer_LoadTimer(InstancePtr, XSCUTIMER_SELFTEST_VALUE);
+ Register = XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr,
+ XSCUTIMER_LOAD_OFFSET);
+
+ /*
+ * Restore the contents of the Load Register and Control Register.
+ */
+ XScuTimer_LoadTimer(InstancePtr, LoadOrig);
+ XScuTimer_WriteReg(InstancePtr->Config.BaseAddr,
+ XSCUTIMER_CONTROL_OFFSET, CtrlOrig);
+
+ /*
+ * Return a Failure if the contents of the Load Register do not
+ * match with the value written to it.
+ */
+ if (Register != XSCUTIMER_SELFTEST_VALUE) {
+ return XST_FAILURE;
+ }
+
+ return XST_SUCCESS;
+}