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From: Juergen Beisert <jbe@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Alexey Galakhov <agalakhov@gmail.com>
Subject: Re: [PATCH 3/9] Minimal S5PV210 + Tiny210 support (2nd stage only)
Date: Mon, 14 May 2012 15:07:33 +0200	[thread overview]
Message-ID: <201205141507.33356.jbe@pengutronix.de> (raw)
In-Reply-To: <4FB0E757.5050508@gmail.com>

Hi Alexey,

Alexey Galakhov wrote:
> >> Using iROM to boot is generally a bad idea, but there's no alternative
> >> right now.
> >
> > For you there might be no alternative right now. But for Barebox its all
> > right if only a basic support for this new CPU is available.
>
> Even if it's not bootable?

At least it can act as a second stage bootloader (network boot for example). 
This is also the stage at which my S3C6410 currently is.

> Ok, there's better plan. Instead of adding iROM in a separate file, I'll
> just call its magic address in board's lowlevel init. So this will be
> for tiny210 only.
>
> > Skip the iROM entirely in your patch series if you want to remove it
> > later on. What sense would it make to include it and then remove it
> > again?
>
> It depends on what one means "remove again". This may happen after a
> year or so. While I think I can implement NAND quite fast, I'm not so
> optimistic about MMC.

In this case MMC boot support just not exists. If it will work with an ugly 
solution there is no more pressure to develop a correct solution for it...and 
it will stay forever.
Keep it in your repository if you need it for your work.

> >> However, there's one bad thing: it's better to add at least one board to
> >> Kconfig with the new arch.
> >
> > ?
>
> If there are no BOARDINFO and board-y defined, barebox cannot be built.
> So one cannot compile barebox with CONFIG_ARCH_something if there are no
> boards utilizing it, right? How to test the compilation then? Is it Ok?

But you can't first add the consumer of a new API (=board file) and after that 
the API itself!

jbe

-- 
Pengutronix e.K.                              | Juergen Beisert             |
Linux Solutions for Science and Industry      | http://www.pengutronix.de/  |

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  reply	other threads:[~2012-05-14 13:08 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-05-12 16:23 [Pull request] Minimal S5PV210 support Alexey Galakhov
2012-05-13  9:09 ` Sascha Hauer
2012-05-13 12:39   ` [PATCH 0/9] " Alexey Galakhov
2012-05-13 12:39     ` [PATCH 1/9] Support most Samsung SoCs in S3C serial driver Alexey Galakhov
2012-05-13 12:39     ` [PATCH 2/9] Fine split S3C arch dependencies from generic code Alexey Galakhov
2012-05-14  8:03       ` Juergen Beisert
2012-05-14  8:54         ` Alexey Galakhov
2012-05-14  8:57           ` Sascha Hauer
2012-05-14  8:59             ` Alexey Galakhov
2012-05-14  9:00           ` Juergen Beisert
2012-05-14  9:30             ` Alexey Galakhov
2012-05-14  8:12       ` Sascha Hauer
2012-05-13 12:40     ` [PATCH 3/9] Minimal S5PV210 + Tiny210 support (2nd stage only) Alexey Galakhov
2012-05-14  8:13       ` Juergen Beisert
2012-05-14  8:57         ` Alexey Galakhov
2012-05-14  9:04           ` Juergen Beisert
     [not found]             ` <4FB0D058.3070206@gmail.com>
2012-05-14  9:57               ` Juergen Beisert
2012-05-14 11:07                 ` Alexey Galakhov
2012-05-14 13:07                   ` Juergen Beisert [this message]
2012-05-14 13:38                     ` Alexey Galakhov
2012-05-13 12:40     ` [PATCH 4/9] S5PV210 iROM magic boot code Alexey Galakhov
2012-05-14  7:51       ` Sascha Hauer
2012-05-14  8:55         ` Alexey Galakhov
2012-05-13 12:40     ` [PATCH 5/9] S5P DRAM support Alexey Galakhov
2012-05-13 12:40     ` [PATCH 6/9] S5P lowlevel clock init Alexey Galakhov
2012-05-13 12:40     ` [PATCH 7/9] Revert "S5PV210 iROM magic boot code" Alexey Galakhov
2012-05-13 12:40     ` [PATCH 8/9] S5P iROM boot support - improved Alexey Galakhov
2012-05-13 12:40     ` [PATCH 9/9] S5P boot header and image generator Alexey Galakhov

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