Re: [Xen-devel] xen_phys_start for 32b

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 06/01/2009 06:36, "Cihula, Joseph" <joseph.cihula@xxxxxxxxx> wrote:

> On 64b builds of Xen, xen_phys_start holds the starting (physical) address of
> the hypervisor.  However, on 32b systems it is 0.  While I realize that 32b
> Xen does not relocate the hypervisor, why not set this variable to the start
> of the code (__pa(&_start)) so that it will represent the same thing on all
> builds?

For both i386 and x86/64:
 __pa(&_start) == xen_phys_start + 1ul<<20

xen_phys_start marks the start of the Xen heap, which Xen text and data is
embedded within.

 -- Keir



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