linux-kernel - Re: [PATCH 24/56] microblaze

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Date:	Mon, 05 May 2008 12:19:09 +1000
From:	John Williams <john.williams@...alogix.com>
To:	monstr@...nam.cz
Cc:	linux-kernel@...r.kernel.org, arnd@...db.de,
	linux-arch@...r.kernel.org, stephen.neuendorffer@...inx.com,
	John.Linn@...inx.com, matthew@....cx, will.newton@...il.com,
	drepper@...hat.com, microblaze-uclinux@...e.uq.edu.au,
	grant.likely@...retlab.ca, Michal Simek <monstr@...str.eu>
Subject: Re: [PATCH 24/56] microblaze_v2: time support


> +static inline void udelay(unsigned long usec)
> +{
> +	unsigned long long tmp = usec;
> +	unsigned long loops = (tmp * 4295 * HZ * loops_per_jiffy) >> 32;
> +	__delay(loops);
> +}

Let's hope like hell the CPU has HW multipler and shifter for this
one! :)

> +++ b/include/asm-microblaze/timex.h
> @@ -0,0 +1,20 @@
> +
> +#define CLOCK_TICK_RATE 1000 /* Timer input freq. */

What's this?  Is it used anywhere?



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