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| author | Keir Fraser <keir.fraser@citrix.com> | 2008-02-14 11:24:49 +0000 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2008-02-14 11:24:49 +0000 |
| commit | df5b25e9af9248d8e00d0ef7e4ce3eec9eb44f97 (patch) | |
| tree | 3e02fd3063de7b4732f1eedf7c412dd44f8696ba /xen/arch/x86/boot/trampoline.S | |
| parent | a43d6abb4b879b46df6682d11f48307d70dfc53e (diff) | |
| download | xen-df5b25e9af9248d8e00d0ef7e4ce3eec9eb44f97.tar.gz xen-df5b25e9af9248d8e00d0ef7e4ce3eec9eb44f97.tar.bz2 xen-df5b25e9af9248d8e00d0ef7e4ce3eec9eb44f97.zip | |
x86/64: Make BIOS call to declare our intention to enter long mode.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
Diffstat (limited to 'xen/arch/x86/boot/trampoline.S')
| -rw-r--r-- | xen/arch/x86/boot/trampoline.S | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/xen/arch/x86/boot/trampoline.S b/xen/arch/x86/boot/trampoline.S index 2c92dc6a00..143612c91f 100644 --- a/xen/arch/x86/boot/trampoline.S +++ b/xen/arch/x86/boot/trampoline.S @@ -155,6 +155,13 @@ trampoline_boot_cpu_entry: lidt bootsym(rm_idt) sti +#if defined(__x86_64__) + /* Declare that our target operating mode is long mode. */ + movw $0xec00,%ax # declare target operating mode + movw $0x0002,%bx # long mode + int $0x15 +#endif + /* * Do real-mode work: * 1. Get memory map. |