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Re: [Xen-devel] Xen & Transmeta (from xen-users)

  • To: xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: "Carl Holtje ;021;vcsg6;" <cwh0803@xxxxxxxxxx>
  • Date: Thu, 26 May 2005 16:59:25 -0400 (EDT)
  • Delivery-date: Thu, 26 May 2005 20:58:48 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

On Wed, 25 May 2005, Keir Fraser wrote:

> GRUB should be passing a magic number in register %eax. Perhaps changes
> you made to the bootstrap assembly code are clobbering %eax before it
> is checked?

Yep -- that was it.. I was using %ax for writing ASCII out..

Ok.. next hurdle- the ACPI checksum function (xen/drivers/acpi/tables.c)
is returning zero -- it calculates the sum to be 1536 (0x600). After the
AND with 0xFF, zero results..

This appears to really throw everything else (the remaining ACPI stuff)
off, as other ACPI properties aren't located/read/understood. This
confusion results in a page fault originating from
xen/drivers/acpi/tables.c#acpi_table_get_sdt ..

I've not had a chance to track it further into the method, but I wanted to
ask the group if they had any idea what was going on/how I can fix

Is this indicative of issues to come, or is this just part of supporting a
new platform?



- --

"There are 10 types of people in the world: Those who understand binary
and those that don't."

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