On Tue, Oct 26, 2010 at 3:21 PM, Srinivas Ganji srinivasganji@gmail.comwrote:
Dear All,
I am new to this U-Boot boot loader environment. We have a AMCC PPC 440EP processor board which is derived from AMCC Yosemite board. I meant, we have prepared (customised) our own board which is equivalent to AMCC Yosemite board. For this board, I build the U-Boot boot loader with the help of ELDK on Ubuntu x86 host system. However, I have modified the following file contents as per my board and processor attributes.
file name located directory
- yosemite.h u-boot/include/configs
- board.c u-boot/arch/powerpc/lib
- init.S and yosemite.c u-boot/board/amcc/yosemite
- start.S u-boot/arch/powerpc/cpu/ppc4xx
After above four file modifications, the u-boot.bin file is created and able to load into our board. However, we are NOT getting any prompt on the hyper terminal. When we debug the sources through our laterbach debugger, we found that the control entered into the relocate_code() function which is called from board_init_f () function. The board_init_f () function is available in board.c file. However, the relocate_code() is implemented in the start.S file. As this is a assembly file, I am not able to understand it completely.
The memories that we are using in our board are DDR SDRAM (64MB - Bank0), Boot flash (32MB - CS0), Application flash (32MB - CS1). We modified these parameters in the yosemite.h file and after loading the u-boot.bin file, we are able to see all the memories configured correctly. However, we are not getting the U-Boot prompt on the hyper terminal.
Please let me know, If I am missing any thing here.
Any help would be greatly appreciated.
Thanks and Regards, Srinivas G
Dear All,
I am getting the following output on the hyper terminal without U-Boot prompt.
U-Boot 2010.09-00369-g1ba91ba-dirty (Oct 26 2010 - 10:35:31) CPU: AMCC PowerPC 440EP Rev. C at 333.333 MHz (PLB=133 OPB=66 EBC=33 PCI=33 MH z) Bootstrap Option E - Boot ROM Location EBC (16 bits) Internal PCI arbiter enabled, PCI async ext clock used 32 kB I-Cache 32 kB D-Cache Board: Yosemite - AMCC PPC440EP Evaluation Board, Rev. 0, PCI-Async=33 MHz I2C: ready DRAM: 64 MiB After init sequence functions completed! addr = 04000000 Before AND - Top of RAM usable for U-Boot at: 04000000 Top of RAM usable for U-Boot at: 04000000 Reserving 822k for U-Boot at: 03f32000 Reserving 1032k for malloc() at: 03e30000 Reserving 144 Bytes for Board Info at: 03e2ff70 Reserving 88 Bytes for Global Data at: 03e2ff18 Stack Pointer at: 03e2fef8 bd->bi_memsize: 67108864 New Stack Pointer is: 03e2fef8 before relocate_code() By the way, I build the sources with the following commands from u-boot directory.
make YOSEMITE_config make all
Please let me know, if you need any additional information. I will provide.
Thanks and Regards, Srinivas G