[U-Boot] Malformed ARP packets

[Remi Lefevre]

Hello,

I ported U-Boot on my custom MPC8270 board.
Everything seems to go well but my ARP packets are malformed:

=> ping 192.168.0.1
Trying FCC1 ETHERNET
Using FCC1 ETHERNET device
sending ARP for c0a80001
ARP broadcast 1
cycles: 25 status: 6c00
ARP broadcast 2
cycles: 20 status: 6c00
ping failed; host 192.168.0.1 is not alive

[60 bytes on wire]                                            <- correct
          correct broadcast  correct mac addr   ARP type
          ----------------- ------------------ -----------
00000000  ff ff ff ff ff ff da b0  4e 0f 0a 26 08 06 00 01  | <- correct
00000010  4e 0f 0a 26 08 06 00 01  4e 0f 0a 26 08 06 00 01  | <- malformed
00000020  00 00 00 00 00 00 c0 a8  00 01 00 00 00 00 00 00  | <- correct
00000030  c0 a8 00 01 00 00 00 00  00 00 00 01              | <- malformed
0000003c

The source mac address seems incorrectly and partially duplicated at
byte 16. Data is not random, but duplicated or mispositioned.

I saw the following thread:
http://lists.denx.de/pipermail/u-boot/2008-January/028159.html

So I checked and double-checked my SDRAM configuration but cannot
find anything wrong. I also get the same results in BBI or PBI.

MII monitoring works correctly:
=> mii dump

miiphy_read(0x0) @ 0x1 = 0x2100
0.     (2100)                 -- PHY control register --
  (8000:0000) 0.15    =     0    reset
  (4000:0000) 0.14    =     0    loopback
  (2040:2000) 0. 6,13 =   b01    speed selection = 100 Mbps
  (1000:0000) 0.12    =     0    A/N enable
  (0800:0000) 0.11    =     0    power-down
  (0400:0000) 0.10    =     0    isolate
  (0200:0000) 0. 9    =     0    restart A/N
  (0100:0100) 0. 8    =     1    duplex = full
  (0080:0000) 0. 7    =     0    collision test enable
  (003f:0000) 0. 5- 0 =     0    (reserved)

=> bdinfo
bd address  = 0x07BA3FB4
memstart    = 0x00000000
memsize     = 0x08000000
flashstart  = 0xF4000000
flashsize   = 0x02000000
flashoffset = 0x00033000
sramstart   = 0x00000000
sramsize    = 0x00000000
immr_base   = 0xF0000000
bootflags   = 0x00000001
vco         = 580.608 MHz
sccfreq     = 145.152 MHz
brgfreq     = 145.152 MHz
intfreq     = 414.720 MHz
cpmfreq     = 290.304 MHz
busfreq     = 82.944 MHz
ethaddr     = DA:B0:4E:0F:0A:26
IP addr     = 192.168.0.42
baudrate    = 115200 bps


Anything I could have forgotten to check ?

Best regards,
Rémi Lefevre