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<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008>hI,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008> i
am developing bootloader for mcf54452 board. i got a EVB for mcf54455
as well as u-boot code.i just changed the u-boot code for mcf54452. there are
few difference only there between the boards.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>In my
board(MCF54452):
In EVB board(MCF54455)</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008>-------------------------------------- -------------------------------------
</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008>FLASH: INTEL flash1(16MB),INTEL
flash2(16MB)=32MB ATMEL
flash1(16MB),INTEL
flash2(16MB)=32MB
</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008>SDRAM: 64 MB single
chip chip0(64
MB)+chip1(64 MB)+chip2(64 MB)+chip3(64 MB)=256 MB </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>Internal clock =200
MHZ 266
MHZ </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>these are
the diffrence only b/w them. </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>when i am executing
my code in my board(MCF54452);</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008>1. A</SPAN></FONT><FONT face=Arial size=2><SPAN
class=481335321-15052008>tter programming the u-boot code (372 KB) in
FLASH,flash itself , it is initializing some devices like serial ..etc. and then
it u-boot code is relocated to upper part of the SDRAM.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>2.IN SDRAM . it will
initialize the PCI,ETHERNET,I2C,SPI and...etc . </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>3. then i will
initialize the interrupts and timers.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>4. then i will got
to u-boot prompt where it gets the commnd from user.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>My problem
is:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>till u-boot code is
relocated to SDRAM is fine(Because i am getting msg a msg that saysthat now
running in RAM). after that my system(MCF54452) is getting
hanged. </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008> </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>i checked
:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>1. Clock
- fine</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>2. SDRAM - i did
read and write for 1 MB (more than u-boot size).</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>3. FLASH
initialization - fine -because code is relocated to SDRAM</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>4. interrupts -all
disabled.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>5. Peripherals
initialization disabled (what are initialized in
SDRAM)</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>when
it relocated the u-boot code to SDRAM , the system is getting out of
control. But we can access the SDRAM by writing and reading.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>i thougt problem in
peripheral initialization, i am not getting prompt even i disabled those
things.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>if anyone of get any
idea reg this problem,just let me know.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=481335321-15052008>Thanks
&Regards,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008>Karthikeyan. </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008> </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
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class=481335321-15052008></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=481335321-15052008></SPAN></FONT> </DIV>
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