From: Pratyush Anand <panand@redhat.com>
To: Geoff Levand <geoff@infradead.org>
Cc: takahiro.akashi@linaro.org, kexec@lists.infradead.org
Subject: Re: [PATCH V2 11/11] arm64: wait for transmit completion before next character transmission
Date: Thu, 29 Oct 2015 16:05:04 +0530 [thread overview]
Message-ID: <20151029103504.GB5387@dhcppc13.redhat.com> (raw)
In-Reply-To: <1445360694.30908.58.camel@infradead.org>
Hi Geoff,
On 20/10/2015:10:04:54 AM, Geoff Levand wrote:
> Hi,
>
> On Tue, 2015-10-20 at 08:11 +0530, Pratyush Anand wrote:
> > On 19/10/2015:03:29:55 PM, Geoff Levand wrote:
> > I tested this on the foundation model and it hangs.
> >
> > Thanks for testing it.
> >
> > Which uart model has been used in foundation model?
>
> I only tested it, but did not look into it. The
> documentation should be on the ARM developer's site.
Line status register offset for pl011(which is in foundation model) and 8250
based uart are not same. I think, in that case we should keep separate argument
for lsr. Can you please try patch[1] and let me know your feedback.
If you are using UART0 of foundation model, then you would be passing
--port=0x1C090000. With patch[1], you may pass one more argument
--port-lsr=0x1C090018,0x80. Even if --port-lsr is not passed to kexec() system
call, it will not hang. However, one may not see all the printed character
without --port-lsr.
~Pratyush
[1] https://github.com/pratyushanand/kexec-tools/commit/57344a8516447cefabc2372daf9a6b0b04bd9851
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next prev parent reply other threads:[~2015-10-29 10:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-14 5:55 [PATCH V2 00/11] ARM64 Binary Image Support Pratyush Anand
2015-05-14 5:55 ` [PATCH V2 01/11] arm64: Kexec: Add support for binary image Pratyush Anand
2015-05-14 5:55 ` [PATCH V2 10/11] arm64: kdump: " Pratyush Anand
2015-05-14 5:55 ` [PATCH V2 11/11] arm64: wait for transmit completion before next character transmission Pratyush Anand
2015-10-19 22:29 ` Geoff Levand
2015-10-20 2:41 ` Pratyush Anand
2015-10-20 17:04 ` Geoff Levand
2015-10-29 10:35 ` Pratyush Anand [this message]
2015-06-05 5:29 ` [PATCH V2 00/11] ARM64 Binary Image Support Pratyush Anand
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