[U-Boot] [U-Boot, v2, 1/7] spl: armv7m: to keep ARM v7M in thumb mode before booting next image

Tom Rini trini at konsulko.com
Sat Jun 10 13:45:54 UTC 2017


On Sun, May 28, 2017 at 12:55:08PM -0700, Vikas Manocha wrote:

> On ARM v7M, the processor will return to ARM mode when executing blx
> instruction with bit 0 of the address == 0. Always set it to 1 to stay in thumb
> mode.
> 
> At present, it is applied only for raw U-Boot. This patch moves it to just
> before booting next image. This way armv7m will be in thumb mode for any image
> like raw or image with header like zImage or standard U-Boot.
> 
> Signed-off-by: Vikas Manocha <vikas.manocha at st.com>

Reviewed-by: Tom Rini <trini at konsulko.com>

-- 
Tom
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