[U-Boot] [PATCH] arm: vf610: fix boot from SD-card

[U-Boot] [PATCH] arm: vf610: fix boot from SD-card

[Stefan Agner]

Boot from SD-card (and probably also from NAND) was broken since
commit d6d07a9bec ("arm: vf610: add NAND support for vf610twr").
It looks like the increased size of U-Boot lead to a situation
where the boot ROM overwrote its own stack/heap while loading
U-Boot from the SD-card to the SRAM. However, U-Boot worked fine
when loaded through USB serial loader directly into SRAM. It
looks like loading from SD-card uses other stack/heap location
then the serial loader (or maybe no stack or heap at all).
This fix moves U-Boot to gfxRAM, which is 512kB in size and is not
used by the boot ROM nor the SD-card loader of it.

Signed-off-by: Stefan Agner <stefan@agner.ch>
---
We use U-Boot from gfxRAM on Vybrid since quite a while for the
Colibri VF50/VF61 modules in our downstream U-Boot branch. Hence
this is quite well tested.

Just today I discovered that this is broken on the Tower module.
Back then, when I made the offending change, I only tested on the
Tower board using the serial loader, since I thought the behaviour
should be exactly the same. But now, I know better... :-)

If still possible, it would be great to get this into v2015.01...

 include/configs/vf610twr.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/configs/vf610twr.h b/include/configs/vf610twr.h
index 6fd0b17..bd79e81 100644
--- a/include/configs/vf610twr.h
+++ b/include/configs/vf610twr.h
@@ -125,7 +125,10 @@
 #define CONFIG_BOOTDELAY		3
 
 #define CONFIG_LOADADDR			0x82000000
-#define CONFIG_SYS_TEXT_BASE		0x3f008000
+
+/* We boot from the gfxRAM area of the OCRAM. */
+#define CONFIG_SYS_TEXT_BASE		0x3f408000
+#define CONFIG_BOARD_SIZE_LIMIT		524288
 
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"script=boot.scr\0" \
-- 
2.2.1

[U-Boot] [PATCH] arm: vf610: fix boot from SD-card

[Bill Pringlemeir]

On  8 Jan 2015, stefan at agner.ch wrote:

> Boot from SD-card (and probably also from NAND) was broken since
> commit d6d07a9bec ("arm: vf610: add NAND support for vf610twr").
> It looks like the increased size of U-Boot lead to a situation
> where the boot ROM overwrote its own stack/heap while loading
> U-Boot from the SD-card to the SRAM. However, U-Boot worked fine
> when loaded through USB serial loader directly into SRAM. It
> looks like loading from SD-card uses other stack/heap location
> then the serial loader (or maybe no stack or heap at all).
> This fix moves U-Boot to gfxRAM, which is 512kB in size and is not
> used by the boot ROM nor the SD-card loader of it.
>
> Signed-off-by: Stefan Agner <stefan@agner.ch>
> ---
> We use U-Boot from gfxRAM on Vybrid since quite a while for the
> Colibri VF50/VF61 modules in our downstream U-Boot branch. Hence
> this is quite well tested.
>
> Just today I discovered that this is broken on the Tower module.
> Back then, when I made the offending change, I only tested on the
> Tower board using the serial loader, since I thought the behaviour
> should be exactly the same. But now, I know better... :-)
>
> If still possible, it would be great to get this into v2015.01...
>
> include/configs/vf610twr.h | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/include/configs/vf610twr.h b/include/configs/vf610twr.h
> index 6fd0b17..bd79e81 100644
> --- a/include/configs/vf610twr.h
> +++ b/include/configs/vf610twr.h
> @@ -125,7 +125,10 @@
> #define CONFIG_BOOTDELAY		3
>
> #define CONFIG_LOADADDR			0x82000000
> -#define CONFIG_SYS_TEXT_BASE		0x3f008000
> +
> +/* We boot from the gfxRAM area of the OCRAM. */
> +#define CONFIG_SYS_TEXT_BASE		0x3f408000
> +#define CONFIG_BOARD_SIZE_LIMIT		524288
>
> #define CONFIG_EXTRA_ENV_SETTINGS \
> 	"script=boot.scr\0" \

Acked-by: Bill Pringlemeir <bpringlemeir@nbsps.com>

See also:
 http://lists.denx.de/pipermail/u-boot/2014-December/197641.html

It seems since v2014.04 u-boot on the Vybrid Tower SD card has not
booted.  Most users will probably boot this way.

 https://community.freescale.com/docs/DOC-95248

Thanks,
Bill Pringlemeir.

[U-Boot] [PATCH] arm: vf610: fix boot from SD-card

[Bill Pringlemeir]

On  8 Jan 2015, stefan at agner.ch wrote:

> Boot from SD-card (and probably also from NAND) was broken since
> commit d6d07a9bec ("arm: vf610: add NAND support for vf610twr").

It was broke before that when fsl_qspi was added?  Or at least that also
added a lot of code.  It maybe dependant on the compiler (and hence
binary size).

> It looks like the increased size of U-Boot lead to a situation where
> the boot ROM overwrote its own stack/heap while loading U-Boot from
> the SD-card to the SRAM.

I didn't think of this.  That is a possibility.

> However, U-Boot worked fine when loaded through USB serial loader
> directly into SRAM. It looks like loading from SD-card uses other
> stack/heap location then the serial loader (or maybe no stack or heap
> at all).

I have tried various u-boot images with git-bisect.  For instance when
the QSPI was added, I had issues.  It seems that an image near 220k was
a threshold.  The offset in the On-chip SRAM is 0x8000 (from the 'ld'
file) and the imximage prints '3f008000'. So, I think that the offset
takes the breaking point to where we cross from OC-SRAM0 to OC-SRAM1; I
guess a stack maybe located here but it must be fairly small.  I thought
that maybe the HAB has a mapping of device memory start/size and didn't
like it when we crossed the boundary.

> This fix moves U-Boot to gfxRAM, which is 512kB in size and is not
> used by the boot ROM nor the SD-card loader of it.

Whatever the issue is, this fixes it for me as well.  I would guess that
NAND boot is also not possible or probably anything but serial-download
modes.

Thanks,
Bill Pringlemeir.

[U-Boot] [PATCH] arm: vf610: fix boot from SD-card

[Stefan Agner]

Hi Bill,

On 2015-01-08 18:32, Bill Pringlemeir wrote:
> On  8 Jan 2015, stefan at agner.ch wrote:
> 
>> Boot from SD-card (and probably also from NAND) was broken since
>> commit d6d07a9bec ("arm: vf610: add NAND support for vf610twr").
>> It looks like the increased size of U-Boot lead to a situation
>> where the boot ROM overwrote its own stack/heap while loading
>> U-Boot from the SD-card to the SRAM. However, U-Boot worked fine
>> when loaded through USB serial loader directly into SRAM. It
>> looks like loading from SD-card uses other stack/heap location
>> then the serial loader (or maybe no stack or heap at all).
>> This fix moves U-Boot to gfxRAM, which is 512kB in size and is not
>> used by the boot ROM nor the SD-card loader of it.
>>
>> Signed-off-by: Stefan Agner <stefan@agner.ch>
>> ---
>> We use U-Boot from gfxRAM on Vybrid since quite a while for the
>> Colibri VF50/VF61 modules in our downstream U-Boot branch. Hence
>> this is quite well tested.
>>
>> Just today I discovered that this is broken on the Tower module.
>> Back then, when I made the offending change, I only tested on the
>> Tower board using the serial loader, since I thought the behaviour
>> should be exactly the same. But now, I know better... :-)
>>
>> If still possible, it would be great to get this into v2015.01...
>>
>> include/configs/vf610twr.h | 5 ++++-
>> 1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/include/configs/vf610twr.h b/include/configs/vf610twr.h
>> index 6fd0b17..bd79e81 100644
>> --- a/include/configs/vf610twr.h
>> +++ b/include/configs/vf610twr.h
>> @@ -125,7 +125,10 @@
>> #define CONFIG_BOOTDELAY		3
>>
>> #define CONFIG_LOADADDR			0x82000000
>> -#define CONFIG_SYS_TEXT_BASE		0x3f008000
>> +
>> +/* We boot from the gfxRAM area of the OCRAM. */
>> +#define CONFIG_SYS_TEXT_BASE		0x3f408000
>> +#define CONFIG_BOARD_SIZE_LIMIT		524288
>>
>> #define CONFIG_EXTRA_ENV_SETTINGS \
>> 	"script=boot.scr\0" \
> 
> Acked-by: Bill Pringlemeir <bpringlemeir@nbsps.com>

Thx!

> 
> See also:
>  http://lists.denx.de/pipermail/u-boot/2014-December/197641.html

Oh, I even gave my Ack for that, but I did not remember it! Oh dear!

> It seems since v2014.04 u-boot on the Vybrid Tower SD card has not
> booted.  Most users will probably boot this way.
> 
>  https://community.freescale.com/docs/DOC-95248

Yes I agree, hence it would be nice to have that working again in
2015.1...

I also think that meta-fsl-arm creates a SD-card boot-able image by
default, but not sure whether mainline U-boot is in use there or not.
Added Otavio for that matter...

Albert, any chance that can make it into 2015.1 too?

--
Stefan

[U-Boot] [PATCH] arm: vf610: fix boot from SD-card

[Otavio Salvador]

On Fri, Jan 9, 2015 at 12:13 PM, Stefan Agner <stefan@agner.ch> wrote:
...
> I also think that meta-fsl-arm creates a SD-card boot-able image by
> default, but not sure whether mainline U-boot is in use there or not.
> Added Otavio for that matter...

Yes we generate and use U-Boot mainline. So I think we ought to
backport this fix for 2014.10 there as well.


-- 
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

[U-Boot] [PATCH] arm: vf610: fix boot from SD-card

[Stefano Babic]

Hi Tom, hi Stefan,

On 09/01/2015 15:13, Stefan Agner wrote:
> Hi Bill,
> 
> On 2015-01-08 18:32, Bill Pringlemeir wrote:
>> On  8 Jan 2015, stefan at agner.ch wrote:
>>
>>> Boot from SD-card (and probably also from NAND) was broken since
>>> commit d6d07a9bec ("arm: vf610: add NAND support for vf610twr").
>>> It looks like the increased size of U-Boot lead to a situation
>>> where the boot ROM overwrote its own stack/heap while loading
>>> U-Boot from the SD-card to the SRAM. However, U-Boot worked fine
>>> when loaded through USB serial loader directly into SRAM. It
>>> looks like loading from SD-card uses other stack/heap location
>>> then the serial loader (or maybe no stack or heap at all).
>>> This fix moves U-Boot to gfxRAM, which is 512kB in size and is not
>>> used by the boot ROM nor the SD-card loader of it.
>>>
>>> Signed-off-by: Stefan Agner <stefan@agner.ch>
>>> ---
>>> We use U-Boot from gfxRAM on Vybrid since quite a while for the
>>> Colibri VF50/VF61 modules in our downstream U-Boot branch. Hence
>>> this is quite well tested.
>>>
>>> Just today I discovered that this is broken on the Tower module.
>>> Back then, when I made the offending change, I only tested on the
>>> Tower board using the serial loader, since I thought the behaviour
>>> should be exactly the same. But now, I know better... :-)
>>>
>>> If still possible, it would be great to get this into v2015.01...
>>>
>>> include/configs/vf610twr.h | 5 ++++-
>>> 1 file changed, 4 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/include/configs/vf610twr.h b/include/configs/vf610twr.h
>>> index 6fd0b17..bd79e81 100644
>>> --- a/include/configs/vf610twr.h
>>> +++ b/include/configs/vf610twr.h
>>> @@ -125,7 +125,10 @@
>>> #define CONFIG_BOOTDELAY		3
>>>
>>> #define CONFIG_LOADADDR			0x82000000
>>> -#define CONFIG_SYS_TEXT_BASE		0x3f008000
>>> +
>>> +/* We boot from the gfxRAM area of the OCRAM. */
>>> +#define CONFIG_SYS_TEXT_BASE		0x3f408000
>>> +#define CONFIG_BOARD_SIZE_LIMIT		524288
>>>
>>> #define CONFIG_EXTRA_ENV_SETTINGS \
>>> 	"script=boot.scr\0" \
>>
>> Acked-by: Bill Pringlemeir <bpringlemeir@nbsps.com>
> 
> Thx!
> 
>>
>> See also:
>>  http://lists.denx.de/pipermail/u-boot/2014-December/197641.html
> 
> Oh, I even gave my Ack for that, but I did not remember it! Oh dear!
> 
>> It seems since v2014.04 u-boot on the Vybrid Tower SD card has not
>> booted.  Most users will probably boot this way.
>>
>>  https://community.freescale.com/docs/DOC-95248
> 
> Yes I agree, hence it would be nice to have that working again in
> 2015.1...
> 
> I also think that meta-fsl-arm creates a SD-card boot-able image by
> default, but not sure whether mainline U-boot is in use there or not.
> Added Otavio for that matter...
> 
> Albert, any chance that can make it into 2015.1 too?
> 

Maybe it is better if Tom can pick it up directly into his tree,
avoiding to go through custodian's tree. Release is coming soon :-).

Regards,
Stefano

-- 
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Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================

[U-Boot] arm: vf610: fix boot from SD-card

[Tom Rini]

On Thu, Jan 08, 2015 at 06:18:25PM +0100, Stefan Agner wrote:

> Boot from SD-card (and probably also from NAND) was broken since
> commit d6d07a9bec ("arm: vf610: add NAND support for vf610twr").
> It looks like the increased size of U-Boot lead to a situation
> where the boot ROM overwrote its own stack/heap while loading
> U-Boot from the SD-card to the SRAM. However, U-Boot worked fine
> when loaded through USB serial loader directly into SRAM. It
> looks like loading from SD-card uses other stack/heap location
> then the serial loader (or maybe no stack or heap at all).
> This fix moves U-Boot to gfxRAM, which is 512kB in size and is not
> used by the boot ROM nor the SD-card loader of it.
> 
> Signed-off-by: Stefan Agner <stefan@agner.ch>
> Acked-by: Bill Pringlemeir <bpringlemeir@nbsps.com>

Applied to u-boot/master, thanks!

-- 
Tom
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