On Friday 26 July 2019 17:35:01 Reco wrote: > Hi. > > On Thu, Jul 25, 2019 at 12:49:32PM -0400, Gene Heskett wrote: > > I am furious (fat lot of good that does me) with the lack of tools, > > and information on how to use them to build an installable > > kernel.deb for a rpi-3b. I know it can be done, I have witnessed > > apt do it several times, on at least two of the arm platforms, once > > on an arm64 running stretch and several times on armhf for releases > > from jessie to buster. > > Raspberry Pi does not use u-boot. Raspbian does not use u-boot. Their > proprietary bootloader can be forced to run u-boot, but its not worth > it - by using u-boot you're limiting yourself to armhf, and Raspberry > Pi3 is an aarch64 board. > > > I want to take a linux-rt tar.xz direct from kernel.org, and its > > patches to bring it up to realtime, build it and install it all on > > the pi-3b, to which I have added a 120GB SSD for workspace, and a > > 10GB swap so it can now build linuxcnc. > > Consider installing a proper Debian first the way it's outlined at > [1]. Booting a custom kernel will be as easy as adding an another > entry to grub.cfg. > > Reco > > [1] > https://pete.akeo.ie/2019/07/installing-debian-arm64-on-raspberry-pi.h >tml I have followed the instructions at that link to the point where I have a single 300MiB fat 16 (type e in fdisk) partition marked as bootable, with the contents of RPi3_UEFI_Firmware_v1.3.zip copied to it. Looks like this: gene@coyote:~/PublicA/pi-buster$ ls -l /media/sdf1 total 5016 -rwxr-xr-x 1 root root 25354 Jul 25 16:46 bcm2710-rpi-3-b.dtb -rwxr-xr-x 1 root root 25617 Jul 25 16:46 bcm2710-rpi-3-b-plus.dtb -rwxr-xr-x 1 root root 52296 Jul 25 16:47 bootcode.bin -rwxr-xr-x 1 root root 925 Jul 25 16:42 config.txt drwxr-xr-x 2 root root 8192 Jul 25 16:42 firmware -rwxr-xr-x 1 root root 6724 Jul 25 16:47 fixup.dat -rwxr-xr-x 1 root root 2617 Jul 25 16:42 Readme.md -rwxr-xr-x 1 root root 2097152 Jul 25 16:54 RPI_EFI.fd -rwxr-xr-x 1 root root 2878180 Jul 25 16:47 start.elf
But this instruction also wants the debian-10.0.0-arm64-netinst.iso written to it, which is 250MiB and which if I use dd to follow this instruction: Extract the content of the Debian ISO you downloaded to the root of the FAT partition. , will overwrite that whole partition. There is not another actual partition defined ATM. There is just barely room for the iso left. So how do I proceed? mc shows me the contents of the .iso, so I will copy that which mc can see starting with .disk So thats done and it did fit. But pete's choice of white on black means I have to waste a printout discovering the FF now has a "simplify" function that turns the 4 pages into 9, but does print sort of black on white paper. When thats done and I have readable hard copy, test time... Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene>
