RE: [XenPPC] systemsim-gpul problems: reserved memory areas

[Hollis Blanchard <hollisb@xxxxxxxxxx>]

On Thu, 2007-01-04 at 14:15 -0700, Yoder Stuart-B08248 wrote:

> I have turned on debug prints in arch/powerpc/boot_of.c.
> One thing I'm puzzling over is why boot_of_alloc_init()
> is marking overlapping regions of memory.  Does that 
> make sense??

It doesn't exactly make sense, but in this case it's not a real
problem...

>     [snip]
>     boot_of_alloc_init: marking 0x0 - 0x0^M
>     boot_of_alloc_init: marking 0x0 - 0x400^M

These two come from your Open Firmware device tree. They don't make
sense IMHO. systemsim may have a bug in its device tree.

We could also have a bug in the way we parse the "available" property,
but I believe our code has been tested on PowerMac and SLOF, and it
looks correct to me.

>     boot_of_alloc_init: marking 0x400000 - 0x88b000^M

This is our code reserving Xen's text, _start to _end.

>     boot_of_alloc_init: marking 0x0 - 0x3000^M

This is our code reserving the exception handlers.

-- 
Hollis Blanchard
IBM Linux Technology Center


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