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/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Use prescale timer at 25000 Hz instead of the baudrate timer at 
 * 19200 to get rid of the 64ppm to fast timer (and we get better 
 * resolution within a jiffie as well. 
 */
#ifndef _ASM_CRIS_ARCH_TIMEX_H
#define _ASM_CRIS_ARCH_TIMEX_H

/* The prescaler clock runs at 25MHz, we divide it by 1000 in the prescaler */
/* If you change anything here you must check time.c as well... */
#define PRESCALE_FREQ 25000000
#define PRESCALE_VALUE 1000
#define CLOCK_TICK_RATE 25000 /* Underlying frequency of the HZ timer */
/* The timer0 values gives 40us resolution (1/25000) but interrupts at HZ*/
#define TIMER0_FREQ (CLOCK_TICK_RATE)
#define TIMER0_CLKSEL flexible
#define TIMER0_DIV (TIMER0_FREQ/(HZ))


#define GET_JIFFIES_USEC() \
  ( (TIMER0_DIV - *R_TIMER0_DATA) * (1000000/HZ)/TIMER0_DIV )

unsigned long get_ns_in_jiffie(void);

static inline unsigned long get_us_in_jiffie_highres(void)
{
	return get_ns_in_jiffie()/1000;
}

#endif

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Name Type Size Permission Actions
bitops.h File 1.81 KB 0644
bug.h File 2.07 KB 0644
cache.h File 219 B 0644
checksum.h File 726 B 0644
delay.h File 394 B 0644
dma.h File 1.74 KB 0644
io.h File 6.46 KB 0644
io_interface_mux.h File 2.02 KB 0644
irq.h File 5.95 KB 0644
irqflags.h File 994 B 0644
memmap.h File 680 B 0644
mmu.h File 3.4 KB 0644
offset.h File 1.19 KB 0644
page.h File 920 B 0644
pgtable.h File 324 B 0644
processor.h File 2 KB 0644
swab.h File 672 B 0644
system.h File 809 B 0644
thread_info.h File 335 B 0644
timex.h File 982 B 0644
tlb.h File 394 B 0644
uaccess.h File 17.7 KB 0644
unistd.h File 4.38 KB 0644