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31 ******************************************************************************/
32 /*****************************************************************************/
36 * This file contains low level functions to get/set time from the Global Timer
37 * register in the ARM Cortex A9 MP core.
40 * MODIFICATION HISTORY:
42 * Ver Who Date Changes
43 * ----- ------ -------- ---------------------------------------------------
44 * 1.00a rp/sdm 11/03/09 Initial release.
45 * 3.07a sgd 07/05/12 Upadted get/set time functions to make use Global Timer
50 ******************************************************************************/
51 /***************************** Include Files *********************************/
54 #include "xpseudo_asm.h"
55 #include "xil_types.h"
56 #include "xil_assert.h"
59 /***************** Macros (Inline Functions) Definitions *********************/
61 /**************************** Type Definitions *******************************/
63 /************************** Constant Definitions *****************************/
65 /************************** Variable Definitions *****************************/
67 /************************** Function Prototypes ******************************/
69 /****************************************************************************/
71 * @brief Set the time in the Global Timer Counter Register.
73 * @param Xtime_Global: 64-bit Value to be written to the Global Timer
78 * @note When this function is called by any one processor in a multi-
79 * processor environment, reference time will reset/lost for all
82 ****************************************************************************/
83 void XTime_SetTime(XTime Xtime_Global)
85 /* Disable Global Timer */
86 Xil_Out32((u32)GLOBAL_TMR_BASEADDR + (u32)GTIMER_CONTROL_OFFSET, (u32)0x0);
88 /* Updating Global Timer Counter Register */
89 Xil_Out32((u32)GLOBAL_TMR_BASEADDR + (u32)GTIMER_COUNTER_LOWER_OFFSET, (u32)Xtime_Global);
90 Xil_Out32((u32)GLOBAL_TMR_BASEADDR + (u32)GTIMER_COUNTER_UPPER_OFFSET,
91 (u32)((u32)(Xtime_Global>>32U)));
93 /* Enable Global Timer */
94 Xil_Out32((u32)GLOBAL_TMR_BASEADDR + (u32)GTIMER_CONTROL_OFFSET, (u32)0x1);
97 /****************************************************************************/
99 * @brief Get the time from the Global Timer Counter Register.
101 * @param Xtime_Global: Pointer to the 64-bit location which will be
102 * updated with the current timer value.
108 ****************************************************************************/
109 void XTime_GetTime(XTime *Xtime_Global)
114 /* Reading Global Timer Counter Register */
117 high = Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_UPPER_OFFSET);
118 low = Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_LOWER_OFFSET);
119 } while(Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_UPPER_OFFSET) != high);
121 *Xtime_Global = (((XTime) high) << 32U) | (XTime) low;