#include <command.h>
#include <asm/system.h>
+DECLARE_GLOBAL_DATA_PTR;
+
/*
* Generic timer implementation of get_tbclk()
*/
unsigned long timer_read_counter(void)
{
unsigned long cntpct;
+#ifdef CONFIG_SYS_FSL_ERRATUM_A008585
+ /* This erratum number needs to be confirmed to match ARM document */
+ unsigned long temp;
+#endif
isb();
asm volatile("mrs %0, cntpct_el0" : "=r" (cntpct));
+#ifdef CONFIG_SYS_FSL_ERRATUM_A008585
+ asm volatile("mrs %0, cntpct_el0" : "=r" (temp));
+ while (temp != cntpct) {
+ asm volatile("mrs %0, cntpct_el0" : "=r" (cntpct));
+ asm volatile("mrs %0, cntpct_el0" : "=r" (temp));
+ }
+#endif
return cntpct;
}
+
+unsigned long long get_ticks(void)
+{
+ unsigned long ticks = timer_read_counter();
+
+ gd->arch.tbl = ticks;
+
+ return ticks;
+}
+
+unsigned long usec2ticks(unsigned long usec)
+{
+ ulong ticks;
+ if (usec < 1000)
+ ticks = ((usec * (get_tbclk()/1000)) + 500) / 1000;
+ else
+ ticks = ((usec / 10) * (get_tbclk() / 100000));
+
+ return ticks;
+}