x86: Tidy up the GDT size in start/16.S
Use a symbol to select the size of the GDT, rather than hard-coding a
value. This matches how it is done in start64
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/start16.S b/arch/x86/cpu/start16.S
index 865a497..8d9acb1 100644
--- a/arch/x86/cpu/start16.S
+++ b/arch/x86/cpu/start16.S
@@ -61,7 +61,7 @@
* GDT is setup in a safe location in RAM
*/
gdt_ptr:
- .word 0x1f /* limit (31 bytes = 4 GDT entries - 1) */
+ .word gdt_end - gdt_rom - 1
.long BOOT_SEG + gdt_rom /* base */
/* Some CPUs are picky about GDT alignment... */
@@ -120,3 +120,4 @@
.byte 0x93 /* access */
.byte 0xcf /* flags + limit_high */
.byte 0x00 /* base_high */
+gdt_end: