[U-Boot] [PATCH V3] mx28: fix SPL code to make USB booting work

[Stefano Babic]

On 07/02/2012 10:32, Matthias Fuchs wrote:
> This patch fixes booting i.MX28 CPUs via USB download.
> In this mode the CPU's bootrom implements a USB HID device that
> accepts a bootstream.
> 
> When downloading the bootstream via USB, first the SPL code is
> received and executed. Then the u-boot image is received and
> called.
> 
> The USB bootmode is interrupt driven.
> 
> This patch fixes two things:
> 
> 1) The ARM's fast interrupt mode is disabled when the SPL code
> has been run. So save and restore the CPSR register.
> 
> 2) Save and restore c1 control register: the exception vector
> location needs to be set back to bootrom space to make the USB
> interrupts work again. The SPL code needs to change this
> option for the ram size probing.
> 
> Signed-off-by: Matthias Fuchs <matthias.fuchs at esd.eu>

Applied to u-boot-imx, thanks

Best regards,
Stefano Babic


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