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From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Mon, 7 Nov 2016 10:44:00 +0100
Message-ID: <CAMuHMdVY41ZNypxUs487jpksdsvhzmfRC8SYVe8RA6TdFbx0VQ@mail.gmail.com>
Subject: Re: GEN2:Lager: Only 1 core works when turning off the SW8-PIN4
To: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Cc: Xuan Truong Nguyen <nx-truong@jinso.co.jp>,
        Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
        duclm <lm-duc@jinso.co.jp>,
        Ryusuke Sakato <ryusuke.sakato.bx@renesas.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>,
        Magnus Damm <magnus.damm@gmail.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        =?UTF-8?B?56iy5ZCJ?= <h-inayoshi@jinso.co.jp>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
        =?UTF-8?B?RHVuZ++8muS6uuOCvQ==?= <nv-dung@jinso.co.jp>,
        Simon Horman <horms+renesas@verge.net.au>,
        Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
        Wolfram Sang <wsa@sang-engineering.com>
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Sender: linux-renesas-soc-owner@vger.kernel.org
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Hi Hiep,

On Fri, Sep 30, 2016 at 12:05 PM, Hiep Cao Minh <cm-hiep@jinso.co.jp> wrote:
>>>> The issue you're seeing is due to a combination of commits
>>>> 5f3bca0db8ac01a7
>>>> ("ARM: shmobile: apmu: Add APMU DT support via Enable method") and
>>>> dc378795156d980c ("ARM: dts: r8a7790: Add APMU nodes").
>>>>
>>>> When debug mode is enabled (SW8-4 = OFF), trying to boot secondary CPUs
>>>> may
>>>> lock up the system after a cold boot, depending of boot load version.
>>>> Hence
>>>> we explicitly prohibit that. BTW, this has been the case on Koelsch
>>>> since
>>>> commit
>>>> 277efd30cfc72ec2 ("ARM: shmobile: Check r8a7791 MD21 at SMP boot").
>>>>
>>>> Now, does series "[PATCH/RFT 0/4] ARM: shmobile: R-Car Gen2: Allow
>>>> booting
>>>> secondary CPU cores in debug mode" (included in all renesas-drivers
>>>> releases
>>>> during September) fix it for you?
>>>
>>> Thanks for your series patches.
>>> I have had some problems of receiving post mail from Linux-Renesas
>>> Mailing
>>> List recently.
>>>
>>> Could you please forward these series patches to me?
>>
>> They're included in renesas-drivers.
>> You can also get them from gitweb at
>>
>> https://git.kernel.org/cgit/linux/kernel/git/geert/renesas-drivers.git/log/?h=topic/rcar-secondary-booting-in-debug-mode-v1
>
> Thanks, I'll confirm these patches on my board.

Have you tried this series on your Lager? If yes, can I add your Tested-by?

Which ES version of R-Car H1 do you have? If you don't know, you can
tell me the result of "md.l 0xff000044 1" in U-Boot.

Thanks!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds