from blob import Entry_blob
class Entry_x86_start16(Entry_blob):
+ """x86 16-bit start-up code for U-Boot
+
+ Properties / Entry arguments:
+ - filename: Filename of u-boot-x86-16bit.bin (default
+ 'u-boot-x86-16bit.bin')
+
+ x86 CPUs start up in 16-bit mode, even if they are 32-bit CPUs. This code
+ must be placed at a particular address. This entry holds that code. It is
+ typically placed at offset CONFIG_SYS_X86_START16. The code is responsible
+ for changing to 32-bit mode and jumping to U-Boot's entry point, which
+ requires 32-bit mode (for 32-bit U-Boot).
+
+ For 64-bit U-Boot, the 'x86_start16_spl' entry type is used instead.
+ """
def __init__(self, section, etype, node):
Entry_blob.__init__(self, section, etype, node)