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Andy Fleming87e29872015-11-04 15:48:32 -06001Rebuilding u-boot for Cyrus
2
3The Cyrus defconfigs are Cyrus_P5020_defconfig and Cyrus_P5040_defconfig.
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5They currently disable size optimization in order to avoid a relocation
6bug in some versions of GCC. As the output size is a constant, the size
7optimization is not currently important.
8
9Cyrus boots off a microSD card in a slot on the motherboard. This requires
10that the u-boot is built for the Pre-Boot Loader on the P5020/P5040.
11In order to reflash u-boot, you must download u-boot.pbl, then write it
12onto the card. To do that from u-boot:
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14> tftp 1000000 u-boot.pbl
15> mmc write 1000000 8 672
16
17If you want to do this via a card reader in linux:
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19> dd if=u-boot.pbl of=/dev/sdX bs=512 oseek=8