From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Petazzoni Date: Thu, 11 Oct 2012 17:23:56 +0200 Subject: [Buildroot] Creating initrd In-Reply-To: <1349968569.14474.10.camel@Homeserver> References: <1349964303.8392.39.camel@Homeserver> <20121011164826.753f8312@skate> <1349968569.14474.10.camel@Homeserver> Message-ID: <20121011172356.6af76f39@skate> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net On Thu, 11 Oct 2012 11:16:09 -0400, Chris Wilkinson wrote: > The .config is here > > http://pastebin.com/84LqnBXS Are you sure you did a "make clean; make" after doing all your configuration changes? Your configuration has almost no packages enabled, the generated root filesystem definitely shouldn't be that big. > This shows what I'm trying to achieve. > > http://d-i.alioth.debian.org/manual/en.armel/ch05s01.html#boot-firmware. > > The output on the serial console goes like this on power up. > > >> > No network interfaces found > > EM-7210 ver.T04 2005-12-12 (For ver.AA) > == Executing boot script in 1.000 seconds - enter ^C to abort > > At this point, hit Control-C to interrupt the boot loader[4]. This > will give you the RedBoot prompt. Enter the following commands: > > > load -v -r -b 0x01800000 -m ymodem ramdisk.gz > > load -v -r -b 0x01008000 -m ymodem zImage > > exec -c "console=ttyS0,115200 rw root=/dev/ram mem=256M at 0xa0000000" -r 0x01800000 You have two choices: 1 Use an initramfs embedded inside the kernel image. This is what Buildroot does when you enable the BR2_TARGET_ROOTFS_INITRAMFS option. In that case, you only need to load zImage to RAM, and execute it, it already contains the initramfs. 2 Use an initramfs outside the kernel image. In that case, don't enable the BR2_TARGET_ROOTFS_INITRAMFS Buildroot option, and simply generated a compressed cpio archive for the root filesystem, thanks to BR2_TARGET_ROOTFS_CPIO + BR2_TARGET_ROOTFS_CPIO_GZIP. Then, make sure your kernel as the support for initramfs enabled. I am quite familiar with choice 1, but I haven't tested choice 2 with Buildroot. Best regards, Thomas -- Thomas Petazzoni, Free Electrons Kernel, drivers, real-time and embedded Linux development, consulting, training and support. http://free-electrons.com