tree 23953b1d7a5120432ce1d446d9ea63b4971a54c7
parent 390fb6b47144adbad453cdf95c130854728c56f8
author Kevin Wolf <mail@kevin-wolf.de> 1372018065 +0200
committer Anthony Liguori <aliguori@us.ibm.com> 1372446112 -0500

multiboot: Calculate upper_mem in the ROM

The upper_mem field of the Multiboot information struct doesn't really
contain the RAM size - 1 MB like we used to calculate it, but only the
memory from 1 MB up to the first (upper) memory hole.

In order to correctly retrieve this information, the multiboot ROM now
looks at the mmap it creates anyway and tries to find the size of
contiguous usable memory from 1 MB.

Drop the multiboot.c definition of lower_mem and upper_mem because both
are queried at runtime now.

Signed-off-by: Kevin Wolf <mail@kevin-wolf.de>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Message-id: 1372018066-21822-3-git-send-email-mail@kevin-wolf.de
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>