plb_temac w/linux 2.6.18.1 driver init error

[Rick Moleres]

Robert,

I haven't seen this before, but perhaps the plb_temac hardware is built
for DMA but xparameters.h is out of sync and thinks it's built with FIFO
mode?  This would probably cause a machine check if trying to write a
FIFO register but it doesn't exist.  You can crosscheck xparameters.h
with your hardware design to verify.

-Rick

-----Original Message-----
From: linuxppc-embedded-bounces+moleres=xilinx.com at ozlabs.org
[mailto:linuxppc-embedded-bounces+moleres=xilinx.com at ozlabs.org] On
Behalf Of robert corley
Sent: Wednesday, November 01, 2006 1:33 PM
To: David Bolcsfoldi
Cc: linux linuxppc-embedded
Subject: RE: plb_temac w/linux 2.6.18.1 driver init error

Anyone?;

The offending instruction is:

out_be32((volatile unsigned *)
InstancePtr->RegBaseAddress+XPF_V200A_RESET_REG_OFFSET,
XPF_V200A_RESET_FIFO_MASK);

called vai a #define in "drivers/xilinx_edk/xpacket_fifo_v2_00_a.c"

Would anyone care to speculate if the error is in the out_be32
definition or is this a function of a memory access to an incorrect
value?

Here is the latest dump:

[    2.702189] xtenet_probe: xtemac 0: IO resources obtained.  IRQ = 0,
MEM = 0x60000000
[    2.710095] xtenet_probe: xtemac 0: private data initialized
[    2.715872]     remap info => start = 0x60000000, end=0x60003fff,
total=16384, virtual dest.=0xc5050000
[    2.725007] xtenet_probe: TEMAC config lookup succeeded.  Details = 
[    2.731369]         Base address    = 0x60000000
[    2.735471]         Unique ID       = 0x0000
[    2.739230]         RCV FIFO depth  = 0x131072
[    2.743161]         XMIT FIFO depth = 0x131072
[    2.747091]         MAC FIFO depth  = 0x64
[    2.750677]         IPIF/DMA config = 0x03
[    2.754260]         DCR Host        = 0x0
[    2.757759]         DRE Engine?     = 0x1
[    2.761260] Initialize : Handlers set up.  Configuring FIFO access...
[    2.767709] XPacketFifoV200a_Initialize : setting FIFO REG base
address to 0xC5052010
[    2.775548] XPacketFifoV200a_Initialize : setting FIFO DATA base
address to 0xC5052200
[    2.783474] XPacketFifoV200a_Initialize : setting IsReady to
286331153
[    2.790011] XPacketFifoV200a_Initialize : resetting FIFO by writing
0x000A to 0xC5052010
[    2.798103] Data machine check in kernel mode.
[    2.802544] Oops: machine check, sig: 7 [#1]

-cy





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