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Subject: Re: svn commit: r266083 - in head/sys/arm: arm include
From: Michael Tuexen <tuexen@freebsd.org>
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Date: Sat, 24 May 2014 21:09:56 +0200
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References: <201405141911.s4EJBFZZ097826@svn.freebsd.org>
 <537D0952.2040001@selasky.org>
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To: Mark R V Murray <markm@FreeBSD.org>
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Cc: Hans Petter Selasky <hps@selasky.org>, svn-src-head@freebsd.org,
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On 22 May 2014, at 09:09, Mark R V Murray <markm@FreeBSD.org> wrote:

>=20
> On 21 May 2014, at 21:15, Hans Petter Selasky <hps@selasky.org> wrote:
>=20
>> On 05/14/14 21:11, Mark Murray wrote:
>>> Author: markm
>>> Date: Wed May 14 19:11:15 2014
>>> New Revision: 266083
>>> URL: http://svnweb.freebsd.org/changeset/base/266083
>>>=20
>>> Log:
>>>  Give suitably-endowed ARMs a register similar to the x86 TSC =
register.
>>>=20
>>=20
>> Hi,
>>=20
>> Regression issue:
>> This commit prevents RPI-B from booting.
>=20
> Thanks, I=92ll look at it ASAP.
Doesn't the ARM1176 use for example
MRC p15, 0, <Rd>, c15, c12, 1    ; Read Cycle Counter Register
to read the value, whereas the=20
you use=20
__asm __volatile("mrc p15, 0, %0, c9, c13, 0": "=3Dr" (ccnt));

Best regards
Michael
>=20
> M
> --=20
> Mark R V Murray
>=20
>=20
>=20