U-Boot
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HaraldWelte (Talk | contribs) |
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[[User:HaraldWelte]] is working on those issues, and in fact most of them have already been implemented. | [[User:HaraldWelte]] is working on those issues, and in fact most of them have already been implemented. | ||
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| + | == Bootloader source code == | ||
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| + | The current bootloader source code can be found at [http://people.gta01.hmw-consulting.de/laforge/src/u-boot/current ]. You will need the original tar.bz2 archive as well as the u-boot-qt2410.patch. | ||
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| + | Untar the sources, apply the patch. run "make qt2410_config", run "make". You will get a resulting "u-boot.bin" image, which you can directly flash (either using existing bootloader or [[sjf2410-linux]]) into NAND. | ||
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| + | == Bootloader development == | ||
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| + | If you want to do bootloader development on the QT2410, it's easier to work with a bootloader image that can be downloaded via USB into RAM instead of flashing. | ||
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| + | To do so, you need to edit the u-boot/include/configs/qt2410.h file, and change the "if 0" in Line 32 into a "if 1", then recompile with "make". | ||
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| + | The resulting "u-boot.bin" is _NOT SUITABLE_ for NAND flash, but only for direct execution from within ram, e.g. by using the [[s3c2410_boot_usb]] program. | ||
Revision as of 08:52, 7 August 2006
The GTA01 uses the u-boot bootloader.
More information on u-boot can be found at [1] and [2].
However, the vanilla u-boot doesn't support many of the features that GTA01 needs, such as
- Support for boot from NAND flahs using S3C2410 Steppingstone
- Support for reading kernel/initrd from SD/Transflash
- Support for S3C2410 NAND flash
- Support for downloading programs via S3C2410 USB Device Controller
- Support to display bootup logo / status on S3C2410 Framebuffer
User:HaraldWelte is working on those issues, and in fact most of them have already been implemented.
Bootloader source code
The current bootloader source code can be found at [3]. You will need the original tar.bz2 archive as well as the u-boot-qt2410.patch.
Untar the sources, apply the patch. run "make qt2410_config", run "make". You will get a resulting "u-boot.bin" image, which you can directly flash (either using existing bootloader or sjf2410-linux) into NAND.
Bootloader development
If you want to do bootloader development on the QT2410, it's easier to work with a bootloader image that can be downloaded via USB into RAM instead of flashing.
To do so, you need to edit the u-boot/include/configs/qt2410.h file, and change the "if 0" in Line 32 into a "if 1", then recompile with "make".
The resulting "u-boot.bin" is _NOT SUITABLE_ for NAND flash, but only for direct execution from within ram, e.g. by using the s3c2410_boot_usb program.
