From: Sascha Hauer <s.hauer@pengutronix.de>
To: robert.jarzmik@free.fr
Cc: barebox@lists.infradead.org
Subject: Re: Envfs embedded in barebox.bin
Date: Thu, 17 Nov 2011 16:49:23 +0100 [thread overview]
Message-ID: <20111117154923.GJ27267@pengutronix.de> (raw)
In-Reply-To: <6cf41d5b-a894-46f5-90e3-23f2b615b104@zimbra1-e1.priv.proxad.net>
On Thu, Nov 17, 2011 at 04:05:19PM +0100, robert.jarzmik@free.fr wrote:
> Hi,
>
> I'm working on a very specific board, where I lack :
> - a serial console (all UARTs are wired to GSM/Bluetooth/GPS chips)
> - a JTAG adapter
> - internal MTD access (I have not ported the MTD driver from linux kernel yet)
> - a USB ethernet / console access (put I didn't port the pxa27x_udc yet)
>
> What I have is :
> - a smartphone screen (framebuffer of PXA270)
>
> I launch barebox.bin using a tool which does it well : disable MMU, flush cache, copy barebox.bin to start of RAM, and transfer control to it.
>
> My issue is that while I'm developping my board code, I have no feedback (because no console available).
So you are doing LED debugging? That's brave ;)
> I'd like to run some hush scripts, and the only available way (so far) is to embed the envfs into barebox.bin.
>
> What I'm attempting is basically to :
> (1) ld -b binary barebox_default_env -o barebox_default_env.o
> (2) add barebox_default_env.o in Makefile, target barebox-common
> (3) add in my board code (board.c) the creation of env0 device:
> devfs_add_partition("ram0", _binary_barebox_default_env_start,
> _binary_barebox_default_env_size,
> PARTITION_FIXED, "env0")
Most boards have this in the config:
CONFIG_DEFAULT_ENVIRONMENT=y
CONFIG_DEFAULT_ENVIRONMENT_GENERIC=y
CONFIG_DEFAULT_ENVIRONMENT_PATH="defaultenv arch/arm/boards/guf-vincell/env"
This means that the content of defaultenv/ and arch/arm/boards/guf-vincell/env
is embedded into the binary (common/Makefile) and gets mounted during
startup (common/startup.c line 113)
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
next prev parent reply other threads:[~2011-11-17 15:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <15dd21bf-86c1-4ca8-a830-caef28d617ee@zimbra1-e1.priv.proxad.net>
2011-11-17 15:05 ` robert.jarzmik
2011-11-17 15:49 ` Sascha Hauer [this message]
2011-11-17 16:02 ` robert.jarzmik
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20111117154923.GJ27267@pengutronix.de \
--to=s.hauer@pengutronix.de \
--cc=barebox@lists.infradead.org \
--cc=robert.jarzmik@free.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox