Hi All,

I am using a custom powerpc board with MPC8265 ( 66/200/300 Mhz) , 32MB of SDRAM     ( 0x00000000 - 0x01FFFFFF)  and 8 MB of Flash Simm ( 0xFF800000 -  0xFFFFFFFF) .

I am modifying the MPC8260ads configurations to match my board but I don't see any messages being printed on the serial port. I am using Codewarrior USB TAP debugger to debug the u-boot code with an initialization file as follows:

setMMRBaseAddr 0x00000000 writemmr        SCCR    0x0000 writemmr        SYPCR           0xffffffc3 writemmr        RMR                     0x0001 # Memory periodic timer prescaler writemmr        MPTPR           0x3200 # Internal memory map register writemmr        IMMR    0x04700000

#Change the debugger's base address to match the new register base setMMRBaseAddr 0x04700000

writemmr        BR0             0xff801001 writemmr        OR0             0xff800836 # CS2 is SDRAM, 64-bit port at 0x00000000

writemmr        BR2             0x00000041 writemmr        OR2             0xfe002ec0

# set 60x Bus assigned SDRAM Refresh Timer (PSRT) writemmr        PSRT            0x13 writemmr        MPTPR           0x2800

# 60x SDRAM Mode Register # precharge all banks

writemmr        PSDMR           0x824b36a3 writemmr        PSDMR           0xaa4b36a3 # perform an access writemem.b      0x00000000      0x00 # cbr refresh

writemmr        PSDMR           0x8a4b36a3

# perform 8 accesses writemem.b      0x00000000      0xFF writemem.b      0x00000000      0xFF writemem.b      0x00000000      0xFF writemem.b      0x00000000      0xFF writemem.b      0x00000000      0xFF writemem.b      0x00000000      0xFF writemem.b      0x00000000      0xFF writemem.b      0x00000000      0xFF

# 60x SDRAM Mode Register # Issue Mode register write

writemmr        PSDMR           0x9a4b36a3 writemem.b      0x00000190      0x00 writemmr        PSDMR           0xc24b36a3

With the above initialization file when I define CONFIG_IMMR to 0xF0000000 in u-boot it just doesn't go further and so I modified it to be same as the initilization file ( 0x0470000) and now I am stepping little further into the code but I am getting stuck at  a point in cpu_init_f in start.S.

Could anyone please let me know the exact configurations I need to define in mpc8260ads.h file in u-boot.

Any help is greatly appreciated.

Thanks in advance Best Regards Jyotshna