[U-Boot] U-Boot loading kernel from mmc question

[Wolfgang Denk]

Dear quantumlight,

In message <1455856589187-246390.post at n7.nabble.com> you wrote:
> I am trying to figure out how the bootm command in U-Boot works. It seems to
> be a state machine that goes from start->findos->findother (fdt)->loados
> etc.
> 
> However I am having trouble understanding how, since my linux image is
> stored in some partition on the device (eMMC), does that get loaded into
> memory?

No, it doesn't.  The 'm' inte "bootm" command name stands for
"memory", i. e. "boot from memory".  Bootm is used on images that can
be found somewhere in the processor's memor address space.  So unless
you have parallel NOR flash or similar, booting is always a two step
procedure: in the first step you load the image from MMC into RAM,
then you use bootm.

Best regards,

Wolfgang Denk

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