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Re: [Xen-devel] SMBIOS starts at 0xe9000 (out of range)


  • To: Guy Zana <guy@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Tue, 13 Nov 2007 15:37:30 +0000
  • Delivery-date: Tue, 13 Nov 2007 07:38:25 -0800
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcgmCEj4SVwEbkIUR9iro4itpNXRaQAAtDe4
  • Thread-topic: [Xen-devel] SMBIOS starts at 0xe9000 (out of range)

I’ll have to double check, but I think that rombios picks up the smbios tables from 0xe9000 and copies them into the valid range. We do it that way because only rombios knows the memory layout 0xf0000-0xfffff.

 -- Keir

On 13/11/07 15:23, "Guy Zana" <guy@xxxxxxxxxxxx> wrote:

#define SMBIOS_PHYSICAL_ADDRESS       0x000E9000

By the spec it should be somewhere between 0xF0000 to 1MB,
There is even a comment in the code:

/* SMBIOS entry point -- must be written to a 16-bit aligned address
   between 0xf0000 and 0xfffff.
 */
struct smbios_entry_point {
...

Any reason for that?

Thanks,
Guy.



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