Dear everyone  i'm Phuong  i living vietnamesepresent, i research chip's atmel (AT91SAM9260) and i want to install u-boot on chip AT91SAM9260 but i have some problem with it, so that i need help from you  this is my step build u-boot: step 1: i configure it for chip AT91SAM9260 technical information:   Basetext :21f00000   set At45DB041D 0x1C   Bus with sdram to 16Bits step 2: i build it with gcc,toolchain   make 0=/tmp/build distclean   make 0=/tmp/build at91sam9260ek_dataflash_cs1_config   make 0=/tmp/build all step 3 : i open samba v2.9 in windows    i puts bootstrap v.1.5 in 0x0   i puts u-boot.bin in 8400 final: i'm reset my board but i get cksum bad.  i don't understand it. can you help me ???

note: i use linux OS(ubuntu 9.04)   I am looking forward to hear from you soon