i386: handle an initrd in highmem (version 2)

Browse source

The boot protocol has until now required that the initrd be located in
lowmem, which makes the lowmem/highmem boundary visible to the boot
loader.  This was exported to the bootloader via a compile-time
field.  Unfortunately, the vmalloc= command-line option breaks this
part of the protocol; instead of adding yet another hack that affects
the bootloader, have the kernel relocate the initrd down below the
lowmem boundary inside the kernel itself.

Note that this does not rely on HIGHMEM being enabled in the kernel.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

This commit is contained in:

H. Peter Anvin 2008-01-30 13:32:51 +01:00 • committed by Ingo Molnar

parent 6d7d743375

commit cf8fa920cb

3 changed files with 112 additions and 27 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

arch/x86/boot/header.S

View file

130

arch/x86/kernel/setup_32.c

View file

4

arch/x86/mm/discontig_32.c

View file