x86: Fix GDT limit in start16.S

GDT limit should be one less than an integral multiple of eight.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/x86/cpu/start16.S b/arch/x86/cpu/start16.S
index 8b9b327cd48734fbd50b71dbe3d6a238151d7074..6968fda6494998d1d595c9862e64a10a8082a3e1 100644 (file)
--- a/arch/x86/cpu/start16.S
+++ b/arch/x86/cpu/start16.S
@@ -70,7 +70,7 @@ idt_ptr:
  * GDT is setup in a safe location in RAM
  */
 gdt_ptr:
-       .word   0x20            /* limit (32 bytes = 4 GDT entries) */
+       .word   0x1f            /* limit (31 bytes = 4 GDT entries - 1) */
        .long   BOOT_SEG + gdt  /* base */
 
 /* Some CPUs are picky about GDT alignment... */