| /****************************************************************************** |
| * |
| * Copyright (C) 2009 - 2015 Xilinx, Inc. All rights reserved. |
| * |
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| * of this software and associated documentation files (the "Software"), to deal |
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| * 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. |
| * |
| * Use of the Software is limited solely to applications: |
| * (a) running on a Xilinx device, or |
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| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| * |
| ******************************************************************************/ |
| /*****************************************************************************/ |
| /** |
| * @file xtime_l.c |
| * |
| * This file contains low level functions to get/set time from the Global Timer |
| * register in the ARM Cortex A9 MP core. |
| * |
| * <pre> |
| * MODIFICATION HISTORY: |
| * |
| * Ver Who Date Changes |
| * ----- ------ -------- --------------------------------------------------- |
| * 1.00a rp/sdm 11/03/09 Initial release. |
| * 3.07a sgd 07/05/12 Upadted get/set time functions to make use Global Timer |
| * </pre> |
| * |
| * @note None. |
| * |
| ******************************************************************************/ |
| /***************************** Include Files *********************************/ |
| |
| #include "xtime_l.h" |
| #include "xpseudo_asm.h" |
| #include "xil_types.h" |
| #include "xil_assert.h" |
| #include "xil_io.h" |
| |
| /***************** Macros (Inline Functions) Definitions *********************/ |
| |
| /**************************** Type Definitions *******************************/ |
| |
| /************************** Constant Definitions *****************************/ |
| |
| /************************** Variable Definitions *****************************/ |
| |
| /************************** Function Prototypes ******************************/ |
| |
| /**************************************************************************** |
| * |
| * Set the time in the Global Timer Counter Register. |
| * |
| * @param Value to be written to the Global Timer Counter Register. |
| * |
| * @return None. |
| * |
| * @note In multiprocessor environment reference time will reset/lost for |
| * all processors, when this function called by any one processor. |
| * |
| ****************************************************************************/ |
| void XTime_SetTime(XTime Xtime_Global) |
| { |
| /* Disable Global Timer */ |
| Xil_Out32((u32)GLOBAL_TMR_BASEADDR + (u32)GTIMER_CONTROL_OFFSET, (u32)0x0); |
| |
| /* Updating Global Timer Counter Register */ |
| Xil_Out32((u32)GLOBAL_TMR_BASEADDR + (u32)GTIMER_COUNTER_LOWER_OFFSET, (u32)Xtime_Global); |
| Xil_Out32((u32)GLOBAL_TMR_BASEADDR + (u32)GTIMER_COUNTER_UPPER_OFFSET, |
| (u32)((u32)(Xtime_Global>>32U))); |
| |
| /* Enable Global Timer */ |
| Xil_Out32((u32)GLOBAL_TMR_BASEADDR + (u32)GTIMER_CONTROL_OFFSET, (u32)0x1); |
| } |
| |
| /**************************************************************************** |
| * |
| * Get the time from the Global Timer Counter Register. |
| * |
| * @param Pointer to the location to be updated with the time. |
| * |
| * @return None. |
| * |
| * @note None. |
| * |
| ****************************************************************************/ |
| void XTime_GetTime(XTime *Xtime_Global) |
| { |
| u32 low; |
| u32 high; |
| |
| /* Reading Global Timer Counter Register */ |
| do |
| { |
| high = Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_UPPER_OFFSET); |
| low = Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_LOWER_OFFSET); |
| } while(Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_UPPER_OFFSET) != high); |
| |
| *Xtime_Global = (((XTime) high) << 32U) | (XTime) low; |
| } |