[Xen-changelog] Increase size of level-2 initial PDE identity map from first 64MB of

[Xen patchbot -3.0-testing <patchbot-3.0-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID d3db967d299a9193972a1e466e9a090358d1ec26
# Parent  b769efb6b1091068baf170b54b35189a3c776f5c
Increase size of level-2 initial PDE identity map from first 64MB of
physical RAM to first 1GB of physical RAM. This allows x86_64 xen to boot
larger dom0 images. Without this changes large dom0 images fail to
boot with "Unknown interrupt" on xen console and wedge.

Signed-off-by: Todd Clayton <todd.clayton@xxxxxxx>

diff -r b769efb6b109 -r d3db967d299a xen/arch/x86/boot/x86_64.S
--- a/xen/arch/x86/boot/x86_64.S        Thu Apr 20 17:04:58 2006 +0100
+++ b/xen/arch/x86/boot/x86_64.S        Thu Apr 20 17:10:51 2006 +0100
@@ -252,10 +252,10 @@ ENTRY(idle_pg_table_l3)
 ENTRY(idle_pg_table_l3)
         .quad idle_pg_table_l2 - __PAGE_OFFSET + 7
 
-/* Initial PDE -- level-2 page table. Maps first 64MB physical memory. */
+/* Initial PDE -- level-2 page table. Maps first 1GB physical memory. */
         .org 0x4000
 ENTRY(idle_pg_table_l2)
-        .macro identmap from=0, count=32
+        .macro identmap from=0, count=512
         .if \count-1
         identmap "(\from+0)","(\count/2)"
         identmap "(\from+(0x200000*(\count/2)))","(\count/2)"

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