[prefix] Use flat real mode for access to high memory
authorMichael Brown <mcb30@ipxe.org>
Mon, 19 Apr 2010 21:22:11 +0000 (22:22 +0100)
committerStefan Hajnoczi <stefanha@gmail.com>
Wed, 7 Jul 2010 19:14:36 +0000 (20:14 +0100)
commit8d2d6ac1ae50dd49e35f2d9b24323e84367a2506
tree35d84cb57a23f1465a127988bbd30dfcf04eb4c6
parent7e4a2d29c8927e27eabff1000d9365506bb41999
[prefix] Use flat real mode for access to high memory

Use flat real mode rather than 16-bit protected mode for access to
high memory during installation.  This simplifies the code by reducing
the number of CPU modes we need to think about, and also increases the
amount of code in common between the normal and (somewhat
hypothetical) KEEP_IT_REAL methods of operation.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com>
src/arch/i386/prefix/libprefix.S