tree 006ba60fcd29b8fdee844ee6d90b85104a254d0d
parent 99aa45595f45603526513d5e29fc00f8afbf3913
author H. Peter Anvin <hpa@zytor.com> 1242082568 -0700
committer H. Peter Anvin <hpa@zytor.com> 1242089079 -0700

x86, boot: make kernel_alignment adjustable; new bzImage fields

Make the kernel_alignment field adjustable; this allows us to set it
to a large value (intended to be 16 MB to avoid ZONE_DMA contention,
memory holes and other weirdness) while a smart bootloader can still
force a loading at a lesser alignment if absolutely necessary.

Also export pref_address (preferred loading address, corresponding to
the link-time address) and init_size, the total amount of linear
memory the kernel will require during initialization.

[ Impact: allows better kernel placement, gives bootloader more info ]

Signed-off-by: H. Peter Anvin <hpa@zytor.com>