* (C) Copyright 2007
* Daniel Hellstrom, Gaisler Research, daniel@gaisler.com
*
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
+ * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <config.h>
+#define TIMER_BASE_CLK 1000000
+#define US_PER_TICK (1000000 / CONFIG_SYS_HZ)
+
DECLARE_GLOBAL_DATA_PTR;
/* reset CPU (jump to 0, without reset) */
while (get_timer(start) < ticks) ;
}
-/* initiate and setup timer0 interrupt to 1MHz
+/* initiate and setup timer0 interrupt to configured HZ. Base clock is 1MHz.
* Return irq number for timer int or a negative number for
* dealing with self
*/
{
LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
- /* 1ms ticks */
+ /* SYS_HZ ticks per second */
leon2->Timer_Counter_1 = 0;
- leon2->Timer_Reload_1 = 999; /* (((1000000 / 100) - 1)) */
+ leon2->Timer_Reload_1 = (TIMER_BASE_CLK / CONFIG_SYS_HZ) - 1;
leon2->Timer_Control_1 =
(LEON2_TIMER_CTRL_EN | LEON2_TIMER_CTRL_RS | LEON2_TIMER_CTRL_LD);
return LEON2_TIMER1_IRQNO;
}
+ulong get_tbclk(void)
+{
+ return TIMER_BASE_CLK;
+}
+
/*
* This function is intended for SHORT delays only.
*/
unsigned long cpu_usec2ticks(unsigned long usec)
{
- /* timer set to 1kHz ==> 1 clk tick = 1 msec */
- if (usec < 1000)
+ if (usec < US_PER_TICK)
return 1;
- return (usec / 1000);
+ return usec / US_PER_TICK;
}
unsigned long cpu_ticks2usec(unsigned long ticks)
{
- /* 1tick = 1usec */
- return ticks * 1000;
+ return ticks * US_PER_TICK;
}