| |
| ******************** WARNING ******************** |
| The compiled U-Boot binary is intended for NAND flash only! |
| It won't work for NOR and will brick that bootloader! |
| |
| Also don't go playing around with different U-boot versions or flash targets |
| unless you've got the necessary hardware and/or know-how to unbrick your kit. |
| |
| 2014.04 is known good for NAND. |
| ******************** WARNING ******************** |
| |
| You'll need to program the files created by buildroot into the flash. |
| The fast way is to tftp transfer the files via one of the network interfaces. |
| |
| Alternatively you can transfer the files via serial console with an Ymodem |
| file transfer from your terminal program by using a "loady" command |
| from the u-boot prompt instead of the "tftp ..." commands stated below. |
| Beware that serial console file transfers are quite slow! |
| |
| Remember to set the MPC8315ERDB switches to NAND boot if you want to use |
| your newly built U-Boot. |
| |
| 1. Program the new U-Boot binary to NAND flash (optional) |
| If you don't feel confident upgrading your bootloader then don't do it, |
| it's unnecessary most of the time. |
| |
| => tftp $loadaddr u-boot-nand.bin |
| => nand erase 0 0x80000 |
| => nand write $loadaddr 0 0x80000 $filesize |
| |
| 2. Program the kernel to NAND flash |
| |
| => tftp $loadaddr uImage |
| => nand erase 0x100000 0x1e0000 |
| => nand write $loadaddr 0x100000 0x1e0000 |
| |
| 3. Program the DTB to NAND flash |
| |
| => tftp $loadaddr mpc8315erdb.dtb |
| => nand erase 0x2e0000 0x20000 |
| => nand write $loadaddr 0x2e0000 0x20000 |
| |
| 4. Program the root filesystem to NAND flash |
| |
| => tftp $loadaddr rootfs.jffs2 |
| => nand erase 0x400000 0x1c00000 |
| => nand write $loadaddr 0x400000 $filesize |
| |
| 5. Booting your new system |
| |
| => setenv nandboot 'setenv bootargs root=/dev/mtdblock3 rootfstype=jffs2 console=$consoledev,$baudrate;nand read $fdtaddr 0x2e0000 0x20000;nand read $loadaddr 0x100000 0x1e0000;bootm $loadaddr - $fdtaddr' |
| |
| If you want to set this boot option as default: |
| |
| => setenv bootcmd 'run nandboot' |
| => saveenv |
| |
| ...or for a single boot: |
| |
| => run nandboot |
| |
| You can login with user "root". |
