Dear all,
1) We have a custom designed MPC8280 board. We have brought up the board using BDi2000 ofcourse after a long struggle. :-) 2) We are trying to bringup the board with u-boot. 3) We are using 2 Micron Flash devices MT28F128J3 so total size is 32 MB. Also our system clock is 83.3 Mhz. Our flash device has a 125ns/25nsec read access time. 4) Our initial boot space as configured in Bdi is 0xfff00100. Our flash base address is 0xfe000000. 12 clock cycle is configured for system clock cycle. 5) In u-boot erase and write time-out are configured for 5000 and 5000 respectively. 6) While we try to debug the code using gdb, the program stops at 0xfff10108. This address is inside ListInserItem. 7) Before u-boot executes, there was data in 0xfff10108 but after it executes, the flash displays the status of the commands (flash specific commands for writing/erasing). When we write the following command in bdi:
mm 0xfe000000 0xffffffff
the flash displays the normal data. That means u-boot data is available from 0xfe000000 but at 0xfff00000 we are seeing all F's but at 0xfff10108 alone we see in the following manner. Something is trying to do a flash erase and that is causing the problem.
0xfff10108 0000ffff 8) From Bdi2000, the stepping happens fine. Atleast it not going till board_init_f, cpu_init_f yes.
My problem is doing debugging from GDB : Why is data at 0xfff00000 gets erased ? And also why is the command given incomplete ?
Hope somebody will help me solve the issue. I can send the map file if somebody needs it. I don't have any special logging or console buffer enabled. Even ethernet code is disabled. Only serial is enabled on SMC1.
With Thanks and Regards, C.R.Srivatsan