Date: Wed, 3 Aug 2016 21:44:09 -0500 From: Erik Moe <e.moe@rcn.com> To: freebsd-arm <freebsd-arm@freebsd.org> Cc: manu@FreeBSD.org Subject: Re: U-boot issues on Banana Pi M2 Message-ID: <DCDF4E6D-8F92-4C05-A128-75D544C4EC39@rcn.com> In-Reply-To: <0403B533-40BC-4674-84CC-2CC3F732B45E@rcn.com> References: <0403B533-40BC-4674-84CC-2CC3F732B45E@rcn.com>
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I spent some time looking into this issue. I believe that the =
u-boot-bananapim2 port is broken because the underlining u-boot code is =
broken, at least for the BPI M2. I built u-boot directly from source =
trying both the v2016.07 and v2016.09-rc1 releases and saw the same =
failure: "Net: data abort". I built u-boot from HEAD as of 26fb8db =
since there were a number of commits for sunxi. I=E2=80=99m not sure =
which one resolved the issue, but by checking out the latest sources and =
applying the freebsd patches I was able to get my BPI M2 to boot:
U-Boot SPL 2016.09-rc1-00211-g26fb8db-dirty (Aug 02 2016 - 04:43:10)
DRAM: 1024 MiB
Trying to boot from MMC1
U-Boot 2016.09-rc1-00211-g26fb8db-dirty (Aug 02 2016 - 04:43:10 -0500) =
Allwinner Technology
CPU: Allwinner A31s (SUN6I)
Model: Sinovoip BPI-M2
DRAM: 1 GiB
WARNING: Caches not enabled
MMC: SUNXI SD/MMC: 0
reading u-boot.env
** Unable to read "u-boot.env" from mmc0:1 **
Using default environment
In: serial
Out: serial
Err: serial
Net: eth0: ethernet@01c30000
starting USB...
USB0: USB EHCI 1.00
USB1: USB OHCI 1.0
scanning bus 0 for devices... 2 USB Device(s) found
Hit any key to stop autoboot: 0
Booting from: mmc 0 ubldr.bin
reading ubldr.bin
224660 bytes read in 51 ms (4.2 MiB/s)
## No elf image at address 0x42000000
## Starting application at 0x42000000 ...
Consoles: U-Boot console
Compatible U-Boot API signature found @0x7af3f4e8
FreeBSD/armv6 U-Boot loader, Revision 1.2
(root@dora, Sat Jul 16 04:11:42 CDT 2016)
DRAM: 1024MB
MMC Device 1 not found
Number of U-Boot devices: 1
U-Boot env: loaderdev=3D'mmc 0'
Found U-Boot device: disk
Checking unit=3D0 slice=3D<auto> partition=3D<auto>... good.
Booting from disk0s2a:
/boot/kernel/kernel data=3D0x65cd64+0x12729c =
syms=3D[0x4+0x8e630+0x4+0xa3375]
Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
/boot/dtb/bananapim2.dtb size=3D0x6151
Loaded DTB from file 'bananapim2.dtb'.
Kernel entry at 0x42200100...
Kernel args: (null)
KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2016 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights =
reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 12.0-CURRENT #0 24eff34(master): Sat Jul 16 04:23:13 CDT 2016
=
root@dora:/usr/home/emoe/Projects/ARM/bannapi-m2/obj/arm.armv6/usr/home/em=
oe/Projects/ARM/src/sys/ALLWINNER arm
FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on =
LLVM 3.8.0)
WARNING: WITNESS option enabled, expect reduced performance.
VT: init without driver.
CPU: Cortex A7 rev 3 (Cortex-A core)
Supported features: ARM_ISA THUMB2 JAZELLE THUMBEE ARMv4 Security_Ext
WB enabled LABT branch prediction disabled
LoUU:2 LoC:3 LoUIS:2
Cache level 1:
32KB/64B 4-way data cache WB Read-Alloc Write-Alloc
32KB/32B 2-way instruction cache Read-Alloc
Cache level 2:
1024KB/64B 8-way unified cache WB Read-Alloc Write-Alloc
real memory =3D 1073741824 (1024 MB)
avail memory =3D 1035898880 (987 MB)
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
random: entropy device external interface
kbd0 at kbdmux0
ofwbus0: <Open Firmware Device Tree>
aw_ccu0: <Allwinner Clock Control Unit> on ofwbus0
.
.
.
Thanks,
Erik
> On Jul 28, 2016, at 6:49 PM, Erik Moe <e.moe@rcn.com> wrote:
>=20
> I=E2=80=99m having some issues with the u-boot-bananapim2 in ports. =
It looks like a data abort exception. Does anybody else have a BPI M2 =
that this port is working for them? If I read this right it=E2=80=99s =
dying in the following function:
>=20
> 4a00218c g F .text 00000038 sunxi_gpio_set_cfgpin
>=20
> I think someone reported a similar but not the same issue upstream: =
http://lists.denx.de/pipermail/u-boot/2016-June/258837.html
>=20
> Thanks,
> Erik
>=20
>=20
> U-Boot SPL 2016.07 (Jul 16 2016 - 02:40:04)
> DRAM: 1024 MiB
> Trying to boot from MMC1
>=20
>=20
> U-Boot 2016.07 (Jul 16 2016 - 02:40:04 -0500) Allwinner Technology
>=20
> CPU: Allwinner A31s (SUN6I)
> Model: Sinovoip BPI-M2
> DRAM: 1 GiB
> WARNING: Caches not enabled
> MMC: SUNXI SD/MMC: 0
> reading u-boot.env
>=20
> ** Unable to read "u-boot.env" from mmc0:1 **
> Using default environment
>=20
> In: serial
> Out: serial
> Err: serial
> Net: data abort
> pc : [<7ef5f180>] lr : [<00000000>]
> reloc pc : [<4a002180>] lr : [<cb0a3000>]
> sp : 7af35f84 ip : 7efab502 fp : 00000017
> r10: 7efaaefe r9 : 7af3cee8 r8 : 000040a0
> r7 : 7ef9ee14 r6 : 00000000 r5 : 00000001 r4 : 00000000
> r3 : 0000000f r2 : 00000001 r1 : 00000000 r0 : ea00000e
> Flags: nzCv IRQs off FIQs off Mode SVC_32
> Resetting CPU ...
>=20
> resetting ...
>=20
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