2c8f92039d
Added initial support Xilinx Embedded Software. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
131 lines
4.6 KiB
C
Executable file
131 lines
4.6 KiB
C
Executable file
/******************************************************************************
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*
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* Copyright (C) 2010 - 2014 Xilinx, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Use of the Software is limited solely to applications:
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* (a) running on a Xilinx device, or
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* (b) that interact with a Xilinx device through a bus or interconnect.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* XILINX CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of the Xilinx shall not be used
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* in advertising or otherwise to promote the sale, use or other dealings in
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* this Software without prior written authorization from Xilinx.
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*
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******************************************************************************/
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/****************************************************************************/
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/**
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*
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* @file xscutimer_selftest.c
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*
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* Contains diagnostic self-test functions for the XScuTimer driver.
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*
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* <pre>
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* MODIFICATION HISTORY:
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*
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* Ver Who Date Changes
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* ----- --- -------- ---------------------------------------------
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* 1.00a nm 03/10/10 First release
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* </pre>
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*
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******************************************************************************/
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/***************************** Include Files *********************************/
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#include "xscutimer.h"
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/************************** Constant Definitions *****************************/
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#define XSCUTIMER_SELFTEST_VALUE 0xA55AF00F
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/**************************** Type Definitions *******************************/
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/***************** Macros (Inline Functions) Definitions *********************/
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/************************** Function Prototypes ******************************/
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/************************** Variable Definitions *****************************/
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/****************************************************************************/
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/**
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*
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* Run a self-test on the timer. This test clears the timer enable bit in
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* the control register, writes to the timer load register and verifies the
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* value read back matches the value written and restores the control register
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* and the timer load register.
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*
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* @param InstancePtr is a pointer to the XScuTimer instance.
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*
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* @return
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* - XST_SUCCESS if self-test was successful.
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* - XST_FAILURE if self test was not successful.
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*
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* @note None.
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*
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******************************************************************************/
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int XScuTimer_SelfTest(XScuTimer *InstancePtr)
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{
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u32 Register;
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u32 CtrlOrig;
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u32 LoadOrig;
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/*
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* Assert to ensure the inputs are valid and the instance has been
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* initialized.
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*/
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Xil_AssertNonvoid(InstancePtr != NULL);
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Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
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/*
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* Save the contents of the Control Register and stop the timer.
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*/
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CtrlOrig = XScuTimer_ReadReg(InstancePtr->Config.BaseAddr,
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XSCUTIMER_CONTROL_OFFSET);
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Register = CtrlOrig & ~XSCUTIMER_CONTROL_ENABLE_MASK;
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XScuTimer_WriteReg(InstancePtr->Config.BaseAddr,
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XSCUTIMER_CONTROL_OFFSET, Register);
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/*
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* Save the contents of the Load Register.
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* Load a new test value in the Load Register, read it back and
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* compare it with the written value.
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*/
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LoadOrig = XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr,
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XSCUTIMER_LOAD_OFFSET);
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XScuTimer_LoadTimer(InstancePtr, XSCUTIMER_SELFTEST_VALUE);
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Register = XScuTimer_ReadReg((InstancePtr)->Config.BaseAddr,
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XSCUTIMER_LOAD_OFFSET);
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/*
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* Restore the contents of the Load Register and Control Register.
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*/
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XScuTimer_LoadTimer(InstancePtr, LoadOrig);
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XScuTimer_WriteReg(InstancePtr->Config.BaseAddr,
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XSCUTIMER_CONTROL_OFFSET, CtrlOrig);
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/*
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* Return a Failure if the contents of the Load Register do not
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* match with the value written to it.
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*/
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if (Register != XSCUTIMER_SELFTEST_VALUE) {
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return XST_FAILURE;
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}
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return XST_SUCCESS;
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}
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