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From: Otavio Salvador <otavio.salvador@ossystems.com.br>
To: u-boot@lists.denx.de
Subject: [U-Boot] Building u-boot.imx and SPL simultaneously
Date: Tue, 6 Sep 2016 10:53:30 -0300	[thread overview]
Message-ID: <CAP9ODKo9qZfBnJ1bZ5uCE7Ht0YD=kbLJ-AP2G0aEThKcxQoRVg@mail.gmail.com> (raw)
In-Reply-To: <20160906134051.GL4990@bill-the-cat>

On Tue, Sep 6, 2016 at 10:40 AM, Tom Rini <trini@konsulko.com> wrote:
> On Fri, Sep 02, 2016 at 10:53:58PM +0200, Petr Kulhavy wrote:
>> Hi Fabio,
>>
>> On 02/09/16 22:03, Fabio Estevam wrote:
>> >You don't need u-boot.imx to boot the board with imx_usb_loader.
>> >Check the README update that Stefano did with this commit:
>> >
>> >commit 40f4839ce12adfc0223d6e3035cf9c3a4754a0ec
>> >Author: Stefano Babic <sbabic@denx.de>
>> >Date:   Fri Dec 11 17:30:42 2015 +0100
>> >
>> >     imx_common: check for Serial Downloader in spl_boot_device
>> >
>> >     Check for bmode before reading the boot device
>> >     to check if a serial downloader is started,
>> >     and returns UART if the serial downloader is set,
>> >     letting SPL to wait for an image if
>> >     CONFIG_SPL_YMODEM_SUPPORT is set.
>> >
>> >     This allows to load again a SPL based board
>> >     with imx_usb_loader together with a tool
>> >     such as kermit.
>> >
>> >     Signed-off-by: Stefano Babic <sbabic@denx.de>
>> >     CC: Tim Harvey <tharvey@gateworks.com>
>> >     CC: Fabio Estevam <Fabio.Estevam@freescale.com>
>> >     CC: Eric Nelson <eric.nelson@boundarydevices.com>
>> >     Reviewed-by: Eric Nelson <eric@nelint.com>
>> >     Tested-by: Eric Nelson <eric@nelint.com>
>> This is not particularly what I want to do. I want to load the
>> u-boot.img directly via the imx_usb_loader.
>> The kermit method is unacceptably slow for a production environment.
>
> Another place this doesn't work (which is where it doesn't work for me)
> is when the console is already open and I can't easily take it away to
> shoot over the next stage via Y-MODEM.
>
> Would it be possible to implement having the next stage also be sent via
> imx_usb_loader?  ie there's examples today of doing u-boot.imx + kernel
> + initrd via imx_usb_loader, so what would be needed for SPL +
> u-boot.img (+ kenrel + initrd) via imx_usb_loader?  Thanks!

It should be the same except that the image will be already loaded and
we need to instruct the SPL to jump to it. Am I missing something?

...
zImage-foo:load 0x82000000
core-image-minimal-foo.cpio.gz:load 0x83800000
u-boot.imx:clear_dcd,jump header

-- 
Otavio Salvador                             O.S. Systems
http://www.ossystems.com.br        http://code.ossystems.com.br
Mobile: +55 (53) 9981-7854            Mobile: +1 (347) 903-9750

  reply	other threads:[~2016-09-06 13:53 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-02 16:46 [U-Boot] Building u-boot.imx and SPL simultaneously Petr Kulhavy
2016-09-02 18:18 ` Stefano Babic
2016-09-02 18:57   ` Petr Kulhavy
2016-09-02 20:03     ` Fabio Estevam
2016-09-02 20:53       ` Petr Kulhavy
2016-09-06 13:40         ` Tom Rini
2016-09-06 13:53           ` Otavio Salvador [this message]
2016-09-06 13:56             ` Tom Rini
2016-09-06 14:00           ` Eric Nelson
2016-09-06 14:12             ` Petr Kulhavy
2016-09-06 14:17               ` Tom Rini
2016-09-06 14:15             ` Tom Rini
2016-09-10 23:40               ` Eric Nelson
2016-09-18  6:50                 ` Peng Fan
2016-09-18  7:18                   ` Stefano Babic
2016-09-02 21:45     ` Stefano Babic
2016-09-02 23:15       ` Petr Kulhavy
2016-09-03  9:40         ` Stefano Babic
2016-09-03 20:27           ` Otavio Salvador
2016-09-04  8:53             ` Stefano Babic

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