<br><font size=2 face="sans-serif">Hi All,</font>
<br><font size=2 face="sans-serif"> Our target is based on
PPC405EP and we are using a TDMoIP chip on the peripheral bus with chipselect
2. Since the access time to the chip is not deterministic we are planning
to use the Ready enable. By probing into Chipselect and ready enable bits
it looks like the chip select gets extended untill the ready enable becomes
1 but the access crashes with a Bus error.</font>
<br><font size=2 face="sans-serif">But If I just set the twt to a very
high value say 20 with ready enable set to 0 then it works. Any pointers
to understand what is happening will be of great help.</font>
<br><font size=2 face="sans-serif">####################### Screen Dump
#################################</font>
<br><font size=2 face="Courier New">Data machine check in kernel mode.</font>
<br><font size=2 face="Courier New">PLB0: BEAR= 0xf8000000 ACR=
0x00000000 BESR= 0x00000000</font>
<br><font size=2 face="Courier New">PLB0 to OPB: BEAR= 0x01000000 BESR0=
0x00000000 BESR1= 0x00000000</font>
<br><font size=2 face="Courier New">Oops: machine check, sig: 7 [#5]</font>
<br><font size=2 face="Courier New">NIP: C90C69BC LR: C90C6AA4 CTR: 000003E0</font>
<br><font size=2 face="Courier New">REGS: c023ef50 TRAP: 0202 Not
tainted (2.6.21)</font>
<br><font size=2 face="Courier New">MSR: 00029030 <EE,ME,IR,DR> CR:
84044408 XER: 00000007</font>
<br><font size=2 face="Courier New">TASK = c3fab050[666] 'cat' THREAD:
c2710000</font>
<br><font size=2 face="Courier New">GPR00: 00000000 C2711650 C3FAB050 C2729000
C2711EAC 00000000 00000C00 C2711EA8</font>
<br><font size=2 face="Courier New">GPR08: 00000000 00000040 FFFFFFFF C9400000
44044408 100A54C0 03FF9C00 00000001</font>
<br><font size=2 face="Courier New">GPR16: 0000005E C01DA824 C02E7F78 C01E0C50
C2711EA8 C01E0C20 C2711EAC C25DC320</font>
<br><font size=2 face="Courier New">GPR24: C2729000 00000000 C2711F20 C90C7FF4
C2729000 C2711EA8 C2711658 C2729000</font>
<br><font size=2 face="Courier New">Call Trace:</font>
<br><font size=2 face="Courier New">[C2711E80] [C90C6AA4]</font>
<br><font size=2 face="Courier New">[C2711EA0] [C009BA60]</font>
<br><font size=2 face="Courier New">[C2711EF0] [C0063E6C]</font>
<br><font size=2 face="Courier New">[C2711F10] [C00642C8]</font>
<br><font size=2 face="Courier New">[C2711F40] [C0002CB4]</font>
<br><font size=2 face="Courier New">Instruction dump:</font>
<br><font size=2 face="Courier New">bf210814 3b697ff4 90010834 817b006c
7c7f1b78 a00b0000 39200002 b0010008</font>
<br><font size=2 face="Courier New">380003ff 7c0903a6 3bc10008 7c0b4a2e
<7c09f32e> 39290002 4200fff4 3c80c90c</font>
<br><font size=2 face="Courier New">Bus error</font>
<br><font size=2 face="Courier New">Thanks,<br>
</font><font size=2 face="Tms Rmn">Ravishankar Govindarao<br>
RFL Electronics Inc.<br>
E-mail</font><font size=1 face="Tms Rmn"> </font><font size=2 face="Tms Rmn">:
</font><a href=mailto:Ravi.Rao@rflelect.com><font size=2 color=blue face="Tms Rmn"><u>Ravi.Rao@rflelect.com</u></font></a>
<br><font size=2 face="Tms Rmn">Voice: 973.334.3100 Ext. 233<br>
Fax: 973.334.3863</font>
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