x86: Support booting SeaBIOS
SeaBIOS is an open source implementation of a 16-bit x86 BIOS.
It can run in an emulator or natively on x86 hardware with the
use of coreboot. With SeaBIOS's help, we can boot some OSes
that require 16-bit BIOS services like Windows/DOS.
As U-Boot, we have to manually create a table where SeaBIOS gets
system information (eg: E820) from. The table unfortunately has
to follow the coreboot table format as SeaBIOS currently supports
booting as a coreboot payload.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/include/asm/tables.h b/arch/x86/include/asm/tables.h
index 9e6754f..ae9f0d0 100644
--- a/arch/x86/include/asm/tables.h
+++ b/arch/x86/include/asm/tables.h
@@ -16,6 +16,9 @@
#define ROM_TABLE_ALIGN 1024
+/* SeaBIOS expects coreboot tables at address range 0x0000-0x1000 */
+#define CB_TABLE_ADDR 0x800
+
/**
* table_compute_checksum() - Compute a table checksum
*