[U-Boot] ASM code for UART initialization

[U-Boot] ASM code for UART initialization

[André Schaller]

Hi,

could someone support me with developing ASM code for initializing UART
interface on OMAP4460 to send some bytes over the wire at a very early
stage of booting x-loader? The code needs to be executed in start.S.

Is it possible to use existing C code and use the generated assembly
from gcc as the actual code or does it need major modifications to be
executed in start.S?

Thanks in advance.

Regards,
Andr?

[U-Boot] ASM code for UART initialization

[Wolfgang Denk]

Dear Andr? Schaller,

In message <51B05614.8070505@googlemail.com> you wrote:
> 
> could someone support me with developing ASM code for initializing UART
> interface on OMAP4460 to send some bytes over the wire at a very early
> stage of booting x-loader? The code needs to be executed in start.S.

Why would you not just use C code?

> Is it possible to use existing C code and use the generated assembly
> from gcc as the actual code or does it need major modifications to be
> executed in start.S?

It should be possible - but you should ask yourself what you then
prevents from using C code instead?

Best regards,

Wolfgang Denk

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