[PATCH v3 0/4] mvebu: Add network support for Armada 370/XP
Uwe Kleine-König
u.kleine-koenig at pengutronix.de
Thu Nov 13 01:09:38 PST 2014
On Wed, Nov 12, 2014 at 12:22:22PM +0100, Sebastian Hesselbarth wrote:
> On 11/12/2014 11:56 AM, Uwe Kleine-König wrote:
> >Hello again,
> >
> >here come the recent insights.
> [...]
> >
> >It seems to be not possible to easily dump the register space in both
> >U-Boot and barebox for comparison. md 0xf1074000+0x4000 just hangs
> >somewhere in the middle.
> >
> >A difference between U-Boot and barebox is the location where the
> >internal registers are mapped. Maybe something that depends on U-Boot's
> >memory layout leaks into barebox because I do 2nd stage booting?
> >
> >Out of ideas at the moment. :-(
>
> Uwe,
>
> Nice comparison, but did you double check caches are disabled? There is
> no support for Dcache on mvebu SoCs in barebox atm.
I would expect that U-Boot disables caches on go. But I remember there
was a bug in that area some time ago.
Now I saw a different behaviour:
Marvell>> dhcp
BOOTP broadcast 1
*** Unhandled DHCP Option in OFFER/ACK: 28
*** Unhandled DHCP Option in OFFER/ACK: 28
DHCP client bound to address 192.168.77.133
Marvell>> tftp barebox-netgear-rn104-2nd.img
Using egiga1 device
TFTP from server 192.168.77.157; our IP address is 192.168.77.133
Filename 'barebox-netgear-rn104-2nd.img'.
Load address: 0x2000000
Loading: ####################
done
Bytes transferred = 292299 (475cb hex)
Marvell>> md 0x01f15000
That is where the descriptor ...
01f15000: ffffffff ffffffff ffffffff ffffffff ................
01f15010: ffffffff ffffffff ffffffff ffffffff ................
01f15020: ffffffff ffffffff ffffffff ffffffff ................
01f15030: ffffffff ffffffff ffffffff ffffffff ................
01f15040: ffffffff ffffffff ffffffff ffffffff ................
01f15050: ffffffff ffffffff ffffffff ffffffff ................
01f15060: ffffffff ffffffff ffffffff ffffffff ................
01f15070: ffffffff ffffffff ffffffff ffffffff ................
01f15080: ffffffff ffffffff ffffffff ffffffff ................
01f15090: ffffffff ffffffff ffffffff ffffffff ................
01f150a0: ffffffff ffffffff ffffffff ffffffff ................
01f150b0: ffffffff ffffffff ffffffff ffffffff ................
01f150c0: ffffffff ffffffff ffffffff ffffffff ................
01f150d0: ffffffff ffffffff ffffffff ffffffff ................
01f150e0: ffffffff ffffffff ffffffff ffffffff ................
01f150f0: ffffffff ffffffff ffffffff ffffffff ................
Marvell>> md 0x01f12040
... and the actual data will be located by barebox:
01f12040: ffffffff ffffffff ffffffff ffffffff ................
01f12050: ffffffff ffffffff ffffffff ffffffff ................
01f12060: ffffffff ffffffff ffffffff ffffffff ................
01f12070: ffffffff ffffffff ffffffff ffffffff ................
01f12080: ffffffff ffffffff ffffffff ffffffff ................
01f12090: ffffffff ffffffff ffffffff ffffffff ................
01f120a0: ffffffff ffffffff ffffffff ffffffff ................
01f120b0: ffffffff ffffffff ffffffff ffffffff ................
01f120c0: ffffffff ffffffff ffffffff ffffffff ................
01f120d0: ffffffff ffffffff ffffffff ffffffff ................
01f120e0: ffffffff ffffffff ffffffff ffffffff ................
01f120f0: ffffffff ffffffff ffffffff ffffffff ................
01f12100: ffffffff ffffffff ffffffff ffffffff ................
01f12110: ffffffff ffffffff ffffffff ffffffff ................
01f12120: ffffffff ffffffff ffffffff ffffffff ................
01f12130: ffffffff ffffffff ffffffff ffffffff ................
Marvell>> go $loadaddr
## Starting application at 0x02000000 ...
barebox 2014.11.0-00127-g263044f25b47-dirty #14 Thu Nov 13 09:26:54 CET 2014
Board: NETGEAR ReadyNAS 104
SoC: Marvell 6710 rev 1
mdio_bus: miibus0: probed
mvneta_setup_tx_rx: port = 0x01f11210, regbase = f1070000
mvneta_setup_tx_rx: port = 0x01f11520, regbase = f1074000
eth1: got preset MAC address: 28:c6:8e:36:df:57
of_get_named_gpio_flags: unable to get gpio num of device pca95540: -19
of_get_named_gpio_flags: unable to get gpio num of device pca95540: -19
of_get_named_gpio_flags: unable to get gpio num of device pca95540: -19
of_get_named_gpio_flags: unable to get gpio num of device pca95540: -19
malloc space: 0x01f00000 -> 0x03dfffff (size 31 MiB)
environment load /dev/env0: No such file or directory
Maybe you have to create the partition.
no valid environment found on /dev/env0. Using default environment
running /env/bin/init...
/env/bin/init not found
barebox:/ ethact eth1
barebox:/ eth1.ipaddr=192.168.77.133
barebox:/ eth1.netmask=255.255.255.0
barebox:/ ping 192.168.77.1
eth1: 1000Mbps full duplex link detected
Send a packet (len = 42, txdesc=0x01f15000):
01f12040: ff ff ff ff ff ff 28 c6 8e 36 df 57 08 06 00 01 ......(..6.W....
01f12050: 08 00 06 04 00 01 28 c6 8e 36 df 57 c0 a8 4d 85 ......(..6.W..M.
01f12060: 00 00 00 00 00 00 c0 a8 4d 01 ........M.
eth1: transmit error 3
ping failed: I/O error
Hmm, never saw an I/O error before. What does error 3 mean?
barebox:/ md 0x01f15000
01f15000: ffffffff 002affff 01f12040 ffffffff ......*.@ ......
01f15010: ffffffff ffffffff ffffffff 01f14ff8 .............O..
01f15020: 00000028 03e303f0 03e30408 00000000 (...............
01f15030: 00000000 01f11fd8 00000000 03e616fc ................
01f15040: 00000000 01f15070 01f11fbc 00000028 ....pP......(...
01f15050: 03e303f0 03e30408 00000000 00000000 ................
01f15060: 01f1507c 00000000 03e616fc 00000000 |P..............
01f15070: 01f150b0 01f15044 00000010 746f6f62 .P..DP......boot
01f15080: 666f2e6d 65657274 01f15000 00000028 m.oftree.P..(...
01f15090: 03e303f0 03e30408 00000000 00000000 ................
01f150a0: 01f150bc 00000000 03e616fc 00000000 .P..............
01f150b0: 01f150f0 01f15070 00000010 746f6f62 .P..pP......boot
01f150c0: 6e692e6d 64727469 01f15000 00000028 m.initrd.P..(...
01f150d0: 03e303f0 03e30408 00000000 00000000 ................
01f150e0: 01f150fc 00000000 03e616fc 00000000 .P..............
01f150f0: 01f15224 01f150b0 00000018 746f6f62 $R...P......boot
barebox:/ md 0x01f12040
01f12040: ffffffff c628ffff 57df368e 01000608 ......(..6.W....
01f12050: 04060008 c6280100 57df368e 854da8c0 ......(..6.W..M.
01f12060: 00000000 a8c00000 ffff014d ffffffff ........M.......
01f12070: ffffffff ffffffff ffffffff ffffffff ................
01f12080: ffffffff ffffffff ffffffff ffffffff ................
01f12090: ffffffff ffffffff ffffffff ffffffff ................
01f120a0: ffffffff ffffffff ffffffff ffffffff ................
01f120b0: ffffffff ffffffff ffffffff ffffffff ................
01f120c0: ffffffff ffffffff ffffffff ffffffff ................
01f120d0: ffffffff ffffffff ffffffff ffffffff ................
01f120e0: ffffffff ffffffff ffffffff ffffffff ................
01f120f0: ffffffff ffffffff ffffffff ffffffff ................
01f12100: ffffffff ffffffff ffffffff ffffffff ................
01f12110: ffffffff ffffffff ffffffff ffffffff ................
01f12120: ffffffff ffffffff ffffffff ffffffff ................
01f12130: ffffffff ffffffff ffffffff ffffffff ................
That looks ok. And when I warm reset and look at these memory locations
using U-Boot again, they are still holding that arp packet. So if it's
really a cache problem, the cache is very insistent and U-Boot has a
problem, too.
Furthermore Sascha interpreted
barebox:/ cpuinfo
implementer: Marvell Semiconductor Inc.
architecture: v7
core: unknown r1p1
cache: 512 bytes (linelen = 64)
Control register: A W P D L Z I DT IT U XP
as: The MMU is off (as there is no M in the Control register line) and
so caches must be off, too.
Looking into the vendor U-Boot sources and they didn't change
drivers/net/kirkwood_egiga.c compared to v2009.08.
Best regards
Uwe
--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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