Devel Digest, Vol 30, Issue 121

[Mitch Bradley]

paul fox wrote:
> mitch wrote:
>  > Open Firmware can boot ELF binaries directly.  Put your .elf file in the 
>  > root directory on a USB key that is formatted with either a FAT 
>  > filesystem (preferred) or an ext2 filesystem.  Then, on an unsecured XO 
>  > laptop, type:
>  > 
>  > ok boot u:\myprogram.elf
>
> mitch -- where are OFW capabilities such as this, and the "client
> interface" mentioned below, documented?  (i suspect i've probably
> seen the doc somewhere in my wiki travels, and didn't at the time
> recognize it for what it was.)
>   

My recent rewrite of the Olpc.fth wiki page documents the basics from 
the XO perspective.

The primary documentation for the client interface is in the IEEE Open 
Firmware standard; you might be able to find a near-final draft online 
with a bit of searching.

FirmWorks sells a book that explains the client interface in gory 
detail.  There might be a copy floating around 1cc; there are certainly 
some copies of the FirmWorks OFW command reference manual.

The OFW source tree contains some example programs that use the client 
interface; look in the "clients/" subdirectory.

A general-purpose call gateway, with templates for all the standard 
client services, can be found in the Linux kernel source at 
http://dev.laptop.org/git?p=olpc-2.6;a=blob;f=arch/x86/kernel/ofw.c