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<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=DE
style='font-size:12.0pt'>Hi,</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=DE
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>I’m trying to get good IO throughput for network
and IDE with my MPC5200Lite board but for now I only have poor performances.</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>I’m using U-Boot 1.1.1 and the ppc linux kernel
from ELDK 3.0.</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>When booting the kernel, it says that the FEC is
working in HD mode. Not full duplex!</span></font></p>
<p class=MsoNormal style='text-indent:35.4pt'><font size=3
face="Times New Roman"><span lang=EN-GB style='font-size:12.0pt'>eth0: config:
auto-negotiation on, 100HDX, 10HDX</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>When testing the IDE throughput with hdparm 5.5, I’m
getting 80MB/s for cache read and 2,3MB/s for non-cache read.</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>I was able to improve the cache read to 160MB/s by restoring,
in u-boot, the </span></font><span lang=EN-GB>Wait</span><span lang=EN-GB> </span><span
lang=EN-GB>State</span><span lang=EN-GB> configuration that was removed in start.S
v1.5</span></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font><span
lang=PT-BR>lis r3, 0x00047800@h</span></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=PT-BR
style='font-size:12.0pt'> ori
r3, r3, 0x00047800@l</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> stw
r3, 0x300(r4)</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>But when trying to enable the DMA for IDE transfer,
the kernel returns a lot of DMA errors.</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>In the "drivers/ide/ppc/mpc5xxx_ide.c" file
at line 323, there is a comment saying: “Re-enable this code when DMA
atually works”. </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>That makes me wonder if DMA is working at all for IDE
transfer!</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>The linuxppc_2_4_devel tree from cvs.denx.de makes the
kernel panic while looking for the partition on the disk…</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>Has anyone got the MPC5200Lite configure to use DMA
for IDE transfer?</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>Cheers,</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>Bertrand</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>PS: Is there a place to discuss about the linux kernel
on the MPC5200?</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt'>I checked over at <a href="http://www.denx.de/">www.denx.de</a>,
but there is no link for such place.</span></font></p>
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