Memory map

0x00000000-0x0001ffff: U-Boot
0x00020000-0x007effff: usable flash space od 131072~8323071 . K dispozici je 8.191.999 bytu
0x007f0000-0x007fffff: U-Boot's environment nothing
0x10000000-0x20000000: SDRAM 
nothing
0x24000000-0x24003fff: internal SRAM
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aktivace SD karty a precteni obsahu:

mmc init  (ve starsich verzi U-boot: mmcinit)
fatls nebo ext2ls mmc 0:1   zobrazi se obsah sdkarty
------------------------------------
Summary of U-Boot commands

protect off	unlock flash
protect on	lock flash
erase		erase flash
cp.b		copy data (bytewise)

The flash of the Network Gateway is partitioned:

0x000000 - 0x01FFFF	U-Boot partition. You'll need a JTAGICEmkII if you corrupt this
0x020000 - 0x7EFFFF	Linux root partition. (This is what we'll update with this guide)
0x7F0000 - 0x7FFFFF	U-Boot environment area. Handled by U-Boot. Promenny 64kbyte
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Flesovani U-Boot pomoci SD-Card:
Uboot> mmcinit
Uboot> ext2load mmc 0:1 0x10000000 u-boot.bin
..reading /u-boot.bin
............
...
104292 bytes read (velikost file je v dec, nutne prevest na hex)
Uboot> protect off 0x0 0x1FFFF
Uboot> erase 0x0 0x1FFFF
Uboot> cp.b 0x10000000 0x0 0x19764 (0xXXXXX = size of u-boot.bin in hex) ; 
Uboot> protect 0x0 0x1FFFF
Uboot> reset
-----------------------------------
Flesovani FileSystem:

erase 0x020000 0x7effff
mmc init
fatload mmc 0:1 0x10000000  openwrt-avr32-squashfs.img (na konci nahrani se zobrazi velikost souboru v dec)
cp.b 0x10000000 0x020000 0xXXXXX (0xXXXXX = size of openwrt image) 0x240000
set bootargs console=tty S0,115200 root=/dev/mtdblock2 rootfstype=squashfs,jffs2 init=/etc/preinit
set bootcmd bootm 0x20000
saveenv