time.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:2k
- /*
- * linux/include/asm-arm/arch-epxa10db/time.h
- *
- * Copyright (C) 2001 Altera Corporation
- *
- * 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
- */
- #include <linux/config.h>
- #include <asm/system.h>
- #include <asm/leds.h>
- #include <asm/arch/hardware.h>
- #define TIMER00_TYPE (volatile unsigned int*)
- #include <asm/arch/timer00.h>
- /*
- * IRQ handler for the timer
- */
- static void excalibur_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- // ...clear the interrupt
- *TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))|=TIMER0_CR_CI_MSK;
- do_leds();
- do_timer(regs);
- do_profile(regs);
- }
- /*
- * Set up timer interrupt, and return the current time in seconds.
- */
- extern __inline__ void setup_timer(void)
- {
- timer_irq.handler = excalibur_timer_interrupt;
- /*
- * Make irqs happen for the system timer
- */
- setup_arm_irq(IRQ_TIMER0, &timer_irq);
- /* Start the timer */
- *TIMER0_LIMIT(IO_ADDRESS(EXC_TIMER00_BASE))=(unsigned int)(EXC_AHB2_CLK_FREQUENCY/200);
- *TIMER0_PRESCALE(IO_ADDRESS(EXC_TIMER00_BASE))=1;
- *TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))=TIMER0_CR_IE_MSK | TIMER0_CR_S_MSK;
- }