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

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 7dc3c0bf1395415979d3dcc4c88e59dc611e2362
# Parent  3ff86698f3941f61d10cdaa97da11ecba5142982
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 3ff86698f394 -r 7dc3c0bf1395 xen/arch/x86/boot/x86_64.S
--- a/xen/arch/x86/boot/x86_64.S        Wed Apr 19 22:23:30 2006 +0100
+++ b/xen/arch/x86/boot/x86_64.S        Wed Apr 19 22:23:44 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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