Hi Gray,
On 2012/07/12, at 0:13, Gary Thomas wrote:
On 2012-07-11 07:08, Gary Thomas wrote:
I just tried rev 211e47549b668c7cdd8658c0413a272f0d0495d4 (v2012.07-rc1) for my PandaBoard. Sadly, this is failing when I try to use the onboard ethernet (EHCI USB based) controller:
U-Boot SPL 2012.07-rc1 (Jul 11 2012 - 06:56:00) OMAP4430 ES2.2 OMAP SD/MMC: 0 reading u-boot.img reading u-boot.img
U-Boot 2012.07-rc1 (Jul 11 2012 - 06:56:00)
CPU : OMAP4430 ES2.2 Board: OMAP4 Panda I2C: ready DRAM: 1 GiB MMC: OMAP SD/MMC: 0 Using default environment
In: serial Out: serial Err: serial Net: No ethernet found. Hit any key to stop autoboot: 0 Panda # usb start (Re)start USB... USB: Register 1313 NbrPorts 3 data abort pc : [<bff9acb0>] lr : [<bff9ac91>] sp : bff08e28 ip : 0000000f fp : 00000000 r10: bff0a370 r9 : 00000002 r8 : bff08f68 r7 : bffbb070 r6 : 00000000 r5 : bffaee04 r4 : 00001313 r3 : bffaee04 r2 : 98000000 r1 : 0000000a r0 : 00000019 Flags: Nzcv IRQs off FIQs off Mode SVC_32 Resetting CPU ...
Anyone else see this? Ideas?
How do I map these addresses (PC=0xbff9acb0) to the ones in my u-boot ELF image (so I can figure out what went wrong)?
Thanks
This turns out to be related to access to the wHubCharacteristics field in a hub descriptor. This field is u16, but not u16 aligned, hence the data abort.
Has something changed recently? I have a version of U-Boot built for this board based on 2011.06 from the meta-ti tree which does not suffer from these problems.
How about this patch?
[PATCH] arm: armv7: add compile option -mno-unaligned-access if available http://lists.denx.de/pipermail/u-boot/2012-July/127260.html