Re: BOOT_CS

From: H. Peter Anvin (hpa_at_zytor.com)
Date: 02/24/04

  • Next message: Pekka Pietikainen: "Re: Promise SATA driver" 
    To: linux-kernel@vger.kernel.org
Date:	Tue, 24 Feb 2004 15:39:51 +0000 (UTC)

    Followup to: <20040224100530.68794.qmail@web11805.mail.yahoo.com>
    By author: =?iso-8859-1?q?Etienne=20Lorrain?= <etienne_lorrain@yahoo.fr>
    In newsgroup: linux.dev.kernel
    >
    > The other problem is for the people who want to check the validity
    > of the RAM disk before starting Linux - for instance by checking
    > the CRC32 of the decompressed RAM disk - and stop the boot process
    > before it is too late - i.e. in the bootloader when you can select
    > another kernel version / initrd to load.
    > You cannot place the decompressed initrd at a maximum address before
    > knowing its decompressed size - the address to place it is the max
    > address (or the end of free RAM) minus ramdisk size if I remember
    > correctly. That is working for so long loading the decompressed
    > initrd after few Mb after the last kernel byte (so that the kernel
    > will move it where it wants - no need to move it twice) that I do
    > not remember the details. Did you changed this part?
    >

    If you absolutely want to do this -- for pretty much no reason -- you
    can either decompress it twice, decompress it to nowhere (after all,
    the kernel will decompress it when it starts) or move it into place
    before starting the kernel.

            -hpa
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