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[Xen-devel] about map_pages_to_xen call during boot memory allocator initialization

  • To: xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: "余上" <yusunn@xxxxxxxxx>
  • Date: Sat, 16 Feb 2008 19:31:44 +0800
  • Delivery-date: Sat, 16 Feb 2008 03:32:08 -0800
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Hi All,
I know that during the initialization of boot memory allocator ,
memory is mapped into Xen's pagetable and I know this is a 1:1 mapping
under x86_32 which means the physical address equals the linear
address . So what purpose is this mapping? After all , boot allocator
just return page frame number , not the physical address the caller
must do another mapping , for example , in init_frametable .

Thank you very much

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