>
>
>I am sorry. I meant 64Mhz , not 66Mhz.
>
>
>
>
>I am running my MPC855T at 66Mhz 1:1 CPU/bus clock mode without any problems.
>I used an app. note from Motorola to do this and according to the app.note, we
>just need to satisfy some timing constraints on the processor (latency of data
>reaching the MPC pins from SDRAM). The app. note suggests using specific
>Micron SDRAM which satisfy all these requirements.
>
>Subject: Re: linux-2.4.18 & copy-back cache mode
>
Maybe it's teh same problem.
I have some problems while strong memory usage, for example copying a lot of
files.
It stops on bus errors.
Anyone could send me UPM table for CAS_LATENCY==3. I'm not sure if burst is
realy needed. Now its disabled, because I do not have correct UPM table for
this.
==================================
I have CPU: XPC860xxZPnnD4 at 80 MHz: 4 kB I-Cache 4 kB D-Cache FEC present
And SDRAM:
DIMM size 0x08000000 (128 MB)
[00] 80 number of bytes written/used
[01] 08 total number of bytes in serial PD device
[02] 04 fundamental memory type (SDRAM)
[03] 0c number of rows
[04] 09 number of columns
[05] 02 number of banks
[06] 40 data width (lo)
[07] 00 data width (hi)
[08] 01 interface levels
[09] 75 RAS access
[0A] 54 CAS access
[0B] 00 configuration type (non-parity/parity/ECC)
[0C] 80 refresh rate/type
[0D] 08 primary DRAM organization
[0E] 00 secondary DRAM organization (parity/ECC-checkbits)
[0F] 01
[12] 04 supported CAS latencies: 3
[1F] 10 bank size (64 MB)
other:
0 1 2 3 4 5 6 7 8 9 a b c d e f
[1x] 8f 04 04 01 01 00 0e a0 60 00 00 14 0f 14 2c 10
[2x] 15 08 15 08 00 00 00 00 00 00 00 00 00 00 00 00
[3x] 00 00 00 00 00 00 00 00 00 00 00 00 00 00 12 9c
[4x] 2c ff ff ff ff ff ff ff 01 00 00 00 00 00 00 00
[5x] 00 00 00 00 00 00 00 00 00 00 00 01 00 ff ff ff
[6x] ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00
[7x] 00 00 00 00 00 00 00 00 00 00 00 00 00 00 64 fd
setup MEM like this
UPM 00804000
MPTPR 00001000
SDRAM 2 32MB BR fff00110=0x000000C1 OR fff00114=0xFE000F00
SDRAM 3 32MB BR fff00118=0x020000C1 OR fff0011c=0xFE000F00
SDRAM 5 32MB BR fff00128=0x040000C1 OR fff0012c=0xFE000F00
SDRAM 6 32MB BR fff00130=0x060000C1 OR fff00134=0xFE000F00
MBMR 4e944112 MAR 000000c8 MCR 80804234 80806234 8080a234 8080c234
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