[OLPC-devel] Re: [One Laptop Per Child] #53: LinuxBIOS sometimes hangs after "Jumping to LinuxBIOS"

[Zarro Boogs per Child]

#53: LinuxBIOS sometimes hangs after "Jumping to LinuxBIOS"
-------------------------------+--------------------------------------------
 Reporter:  wmb at firmworks.com  |        Owner:  rminnich
     Type:  defect             |       Status:  new     
 Priority:  major              |    Milestone:          
Component:  linuxbios          |   Resolution:          
 Keywords:                     |  
-------------------------------+--------------------------------------------
Comment (by JordanCrouse):

 Tom Sylla felt that maybe the PLL isn't locking into place until we do our
 first memory access.  I tested writing to the memory in the debugger
 before the ROM copy, and early results were convincing,  so I patched the
 code to write to memory in {{{__main}}}, and subsequent ROMs seem to
 consistantly work.

 I am hesitant, however, because it seem that some of the wackiness is due
 to the debugger - removing the debugger seems to cause the un-fixed ROM to
 fail less (but it still fails).  I'm nowhere near convinced that this is
 actually '''the''' problem that others are seeing, but it is certainly
 '''a''' problem and in any case, doesn't hurt.

 My current patch is [http://dev.laptop.org/~jcrouse/warmboot.patch]
 PS:  Not being able to add attachments to bugs is double plus ungood,
 IMHO)

-- 
Ticket URL: <http://dev.laptop.org/ticket/53#comment:14>
One Laptop Per Child <http://laptop.org/>