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author | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-11 10:41:07 +0300 |
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committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2016-04-13 08:17:18 +0300 |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/h8300/lib/delay.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/h8300/lib/delay.c')
-rw-r--r-- | kernel/arch/h8300/lib/delay.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/kernel/arch/h8300/lib/delay.c b/kernel/arch/h8300/lib/delay.c new file mode 100644 index 000000000..463f6b3af --- /dev/null +++ b/kernel/arch/h8300/lib/delay.c @@ -0,0 +1,40 @@ +/* + * delay loops + * + * Copyright (C) 2015 Yoshinori Sato + */ + +#include <linux/module.h> +#include <linux/delay.h> +#include <asm/param.h> +#include <asm/processor.h> +#include <asm/timex.h> + +void __delay(unsigned long cycles) +{ + __asm__ volatile ("1: dec.l #1,%0\n\t" + "bne 1b":"=r"(cycles):"0"(cycles)); +} +EXPORT_SYMBOL(__delay); + +void __const_udelay(unsigned long xloops) +{ + u64 loops; + + loops = (u64)xloops * loops_per_jiffy * HZ; + + __delay(loops >> 32); +} +EXPORT_SYMBOL(__const_udelay); + +void __udelay(unsigned long usecs) +{ + __const_udelay(usecs * 0x10C7UL); /* 2**32 / 1000000 (rounded up) */ +} +EXPORT_SYMBOL(__udelay); + +void __ndelay(unsigned long nsecs) +{ + __const_udelay(nsecs * 0x5UL); /* 2**32 / 1000000000 (rounded up) */ +} +EXPORT_SYMBOL(__ndelay); |