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Kernel config option "ppc_of_boot_trampoline"
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Bones McCracker
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PostPosted: Wed Sep 16, 2009 8:09 pm    Post subject: Kernel config option "ppc_of_boot_trampoline" Reply with quote

What is the significance of the following kernel option (new in kernel 2.6.30 apparently):

---------------------------------------------------------------------------
PPC_OF_BOOT_TRAMPOLINE

Support from booting from Open Firmware or yaboot using an
Open Firmware client interface. This enables the kernel to
communicate with open firmware to retrieve system informations
such as the device tree.

In case of doubt, say Y
---------------------------------------------------------------------------

Is this what old-ish Macs have been doing all along, or does this enable some new capability (e.g., obviating yaboot)?
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gringo
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PostPosted: Thu Sep 17, 2009 2:53 pm    Post subject: Reply with quote

Quote:
obviating yaboot


i´m not an expert of course but looking to the first commit this looks like they have just split /deprecated an old configuration option :

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=28794d34ecb6815a3fa0a4256027c9b081a17c5f

so yes, if i understand it correctly, you should enable that in case you are booting from of using yaboot.

cheers
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Bones McCracker
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PostPosted: Thu Sep 17, 2009 4:56 pm    Post subject: Reply with quote

Okay, thanks. And looking at prom_init.c seems to confirm that.

Thank you.
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