2 * linux/include/asm-arm/arch-epxa10db/time.h
4 * Copyright (C) 2001 Altera Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <asm/system.h>
22 #include <asm/arch/hardware.h>
23 #define TIMER00_TYPE (volatile unsigned int*)
24 #include <asm/arch/timer00.h>
28 * IRQ handler for the timer
31 excalibur_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
34 // ...clear the interrupt
35 *TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))|=TIMER0_CR_CI_MSK;
45 * Set up timer interrupt, and return the current time in seconds.
47 void __init time_init(void)
49 timer_irq.handler = excalibur_timer_interrupt;
52 * Make irqs happen for the system timer
54 setup_irq(IRQ_TIMER0, &timer_irq);
57 *TIMER0_LIMIT(IO_ADDRESS(EXC_TIMER00_BASE))=(unsigned int)(EXC_AHB2_CLK_FREQUENCY/200);
58 *TIMER0_PRESCALE(IO_ADDRESS(EXC_TIMER00_BASE))=1;
59 *TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))=TIMER0_CR_IE_MSK | TIMER0_CR_S_MSK;