Here are the files needed to run Linux on Plasmo's CB3030 board.

March 30,2020 Release

This is the initial release of a boot loader for the CB030 based upon Tobster's T030 boot loader and Linux 4.9.156 using an initrd for the file system. It does support the CF interface but does not contain any networking support.

Boot Loader

Before you can run use the boot loader, you'll need Updated CPLD from Plasmo's CB030 page. Currently there is a separate binary for each size of SIMM installed in the board:

The boot loader (via 0.cmd) will load the initrd and linux kernel and launch Linux. There should be a msdos or fat partition (NOT a vfat or any extended FAT partition type as the boot loader doesn't currently have support for extended/long fiel names) on the CF with this contents:

Mercury=>ls /mnt/tmp
total 4166
-rwxr-xr-x 1 root root     191 Mar 27 12:28 0.cmd
-rwxr-xr-x 1 root root 1132600 Mar 29 12:00 initrd.gz
-rwxr-xr-x 1 root root 3124952 Mar 30 11:43 linux.bin

And this is how I have my 4GB CF card (Transcend TS4GCF133)partitioned:

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1           2       16033+   c  W95 FAT32 (LBA)
/dev/sdd2               3          11       72292+  82  Linux swap / Solaris
/dev/sdd3              12         487     3823470   83  Linux

And I formatted the partitions under Linux using these commands:

   305  12:45   sudo mkfs.msdos -n "boot" /dev/sdd1
   309  12:45   sudo mkswap -L swap /dev/sdd2
   312  12:46   sudo mkfs.ext4 -L root /dev/sdd3

During initialization, the boot loader will run the “0.cmd” if it can find it on the first partition of the CF. You can opt out of that by hitting Enter during the first 5 seconds or so.

Once you get the Linux login prompt, root is the account name and there is no password. You should then be greeted by the shell prompt and a normal Linux experience.

Linux Images


To build the boot loader, you'll need a m68k cross compiler along with newlib built for the m68k. I then use this command to build the image:

=>make BOARD=cb030 clean && make BOARD=cb030

To build the Linux kernel, I use these commands:

=>make ARCH=m68k CROSS_COMPILE=m68k-elf- cb030_defconfig
=>make ARCH=m68k CROSS_COMPILE=m68k-elf- -j6 vmlinux && m68k-elf-objcopy -Obinary vmlinux linux.bin

You only have to make cb030_defconfig once. To change the build options, use:

=>make ARCH=m68k CROSS_COMPILE=m68k-elf- menuconfig
=>make ARCH=m68k CROSS_COMPILE=m68k-elf- -j6 vmlinux && m68k-elf-objcopy -Obinary vmlinux linux.bin

builderpages/mikemac/cb030.txt · Last modified: 2020/04/03 16:23 by mikemac
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