From mboxrd@z Thu Jan 1 00:00:00 1970 To: Rudolf Ladyzhenskii Cc: "Linuxppc-Embedded (E-mail)" Subject: Re: autoboot with initial RAM disk From: Wolfgang Denk Mime-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 In-reply-to: Your message of "Fri, 21 Dec 2001 15:44:51 +1100." Date: Fri, 21 Dec 2001 09:49:30 +0100 Message-Id: <20011221084935.0CEFB10E21@denx.denx.de> Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: In message you wrote: > > I am using ppcboot to start my 8260 based card. At the moment, we load Linux > kernel via tftp and then start it. Linux kernel maps its root file system > over the network. This works fine qith ppcboot autoboot feature. > > Now, we want to put initial RAM disk into RAM as well as compressed kernel. > Do do that, both images have to be copied into card's memory using tftp and > them bootm command will be used with two arguments to start kernel. > > To continue to use ppcboot autoboot feature we have to pass two commands as > boot command (to tftp two kernels) and then issue bootm command with two > arguments. Is there any way of doing it without altering the ppcboot source > code? There are many ways. First, you can define a complex boot sequence in one command, for instance like this: => setenv bootcmd tftp 100000 /tftpboot/pImage\;tftp 200000 /tftpboot/pRamdisk\;bootm 100000 200000 You can also get the IP configuration in the first step for instance using DHCP and then re-use this: => setenv bootcmd dhcpboot 100000\;tftp 200000 /tftpboot/pRamdisk\;bootm 100000 200000 etc. But the most simple way is to combine the kernel and ramdisk images into one PPCBoot image (using the "multi-file image" format) and just use this: => setenv bootcmd tftp 100000 /tftpboot/pMulti\;bootm 100000 See the SELF Makefile for example how to build multifile images. You can find our Simple Embedded Linux Framework at ftp://ftp.denx.de/pub/LinuxPPC/usr/src/SELF/SELF-2001-12-13-2335.tar.bz2 Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de Far back in the mists of ancient time, in the great and glorious days of the former Galactic Empire, life was wild, rich and largely tax free. - Douglas Adams, _The Hitchhiker's Guide to the Galaxy_ ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/