On Thu, 29 Nov 2012, Simon Glass wrote:

Hi,

On Tue, Nov 20, 2012 at 8:16 AM, Lee Jones [off-list ref] wrote:

quoted

quoted

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+/* for automatic boot timing testcases */
+#define ATAG_BOOTTIME  0x41000403

Where can I refer this ATAG usage? can you point out the reference URL
or patches?

I assumed this would be in Mainline u-boot, but apparently not.
On closer inspection of the internal ST-Ericsson u-boot, this
functionality appears to be provided by patches which currently
exist as delta. So in essence, the bootloader you use will have
to be patched in a similar way for you to retrieve information
surrounding bootloader boot times.

And there was me thinking it was magic. ;)

Okay, so I'm going through the motions of upstreaming this magic
now. Please see the link below for reference:

http://marc.info/?l=u-boot&m=135342273317337&w=2

Given that U-Boot has bootstage, would it make sense to upstream that
to the kernel? Some RFC patches were sent before this went into U-Boot
to sound out the interest.

Right. As Simon and I have already discussed, I am pulling the
u-boot and kernel boottime components in lieu of bootstage.

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
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