<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE></TITLE>
<META http-equiv=Content-Type content="text/html; charset=us-ascii">
<META content="MSHTML 6.00.2900.2963" name=GENERATOR></HEAD>
<BODY text=#000000 bgColor=#ffffff>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=375025422-01092006>The xparameters.h file is generated by the Xilinx EDK
for our FPGA, so I don't see how there could be a mismatch. Using Chipscope, we
were able to find that the interrupt controller is triggered on kernel
initialization, but after the kernel has finished loading, the system moves to a
snail's pace at login. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=375025422-01092006></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=375025422-01092006>Does Linux use a different set of code to handle the
UART, INTC, etc. after the kernel is loaded? The system appears to work
perfectly up until after the kernel is done loading.</SPAN></FONT></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> Peter Ryser
[mailto:peter.ryser@xilinx.com] <BR><B>Sent:</B> Monday, August 28, 2006 8:45
PM<BR><B>To:</B> Clint Thomas<BR><B>Cc:</B>
linuxppc-embedded@ozlabs.org<BR><B>Subject:</B> Re: PPC405 system slow
boot<BR></FONT><BR></DIV>
<DIV></DIV>Clint,<BR><BR>check the interrupt sub-system of your design. What you
describe typically happens when the PPC does not get any interrupts from the
UART. It's most likely a mismatch between your hardware and the
xparameters.h.<BR><BR>- Peter<BR><BR><BR>Clint Thomas wrote:
<BLOCKQUOTE
cite=mid3C02138692C13C4BB675FE7EA240952918E1E2@bluefin.Soneticom.local
type="cite">
<META content="MSHTML 6.00.2900.2963" name=GENERATOR>
<DIV><SPAN class=068485119-28082006><FONT face=Arial size=2>Hey
guys,<BR><BR>I've run through the loops to try and figure what could be wrong
with this system. The board in question is modeled after the Xilinx ML300
board. It uses a Xilinx System ACE chip to load a FPGA / Kernel image from
compact flash. Originally, I was trying to use the CompactFlash as the root
file system, but because of issues in either the design or software, this
would only work if SysAce was in polled I/O mode. To circumvent this, I built
my root filesystem into an initrd image and built a single ELF file with the
Kernel and RFS, then strapped that to the FPGA bit file to make a single
FPGA/Kernel/RFS SysAce file.<BR><BR>Upon decompression, the Linux kernel boots
quickly and loads all of the device drivers. However when it gets to the
prompt, it starts slowing down. Output and input to and from the board becomes
very very slow (it displays 2 characters roughly every 20 seconds). Originally
I believed this to be the CPU still polling SystemAce, so I disabled the Linux
System ACE drivers to remove that as a possibility, however after doing this,
the problem still persists, even with the RFS in ram! Has anybody encountered
a similar situation to this before, with possible insight towards a solution?
Thank you for your time.</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV align=left><FONT face=Arial size=2>Clinton Thomas<BR><A
class=moz-txt-link-abbreviated
href="mailto:cthomas@soneticom.com">cthomas@soneticom.com</A></FONT></DIV>
<DIV> </DIV><PRE wrap=""><HR width="90%" SIZE=4>
_______________________________________________
Linuxppc-embedded mailing list
<A class=moz-txt-link-abbreviated href="mailto:Linuxppc-embedded@ozlabs.org">Linuxppc-embedded@ozlabs.org</A>
<A class=moz-txt-link-freetext href="https://ozlabs.org/mailman/listinfo/linuxppc-embedded">https://ozlabs.org/mailman/listinfo/linuxppc-embedded</A></PRE></BLOCKQUOTE></BODY></HTML>