onion omega2+
Mike Wolman
mike at wolman.co.uk
Mon May 8 19:02:40 UTC 2017
Thanks Aleksandr,
I will have a go with trying to get the address correct - this was the
main thing I was unsure if I had got right
Will report back hopefully with a dmesg later,
Mike.
On 08/05/2017 19:41, Aleksandr Rybalko wrote:
> Hi Mike!
>
> I see you have no "OK" after "Uncompressing Kernel Image ...", so
> first point uboot decompressor fail.
> Why fail? Because you have wrong base address in image:
> Load Address: fffffff2
> Entry Point: fffffff2
> MIPS32 machines have RAM mapped to 0x80000000 address, so adding its
> size, you will get max address (if 16MB, it will be 0x81000000), but
> you uboot image was created with 0xfffffff2.
>
> Even more, unpacked kernel expects it will be called at 0x80001100. so
> if you have ELF kernel (file with ELF header, like every executable)
> that file have to be loaded at (0x80001100 - ELF_HEADER_SIZE).
> In most cases it will be 0x80001100 - 0x100 = 0x80001000. But sometime
> (I did not found why) it can be 0x20, you can find it by looking at
> .text section in readelf -S.
>
> So if you have kernel with entry point 0x80001100 and .text segment
> offset 0x100, you have to create uboot image with load address
> 0x80001000 and entry point 0x80001100.
>
> If that step successful you will get:
> /Uncompressing Kernel Image/ ... OK
> Starting kernel ...
>
> Last line mean, uboot did jump into kernel code.
>
> Good luck.
>
> 2017-05-07 18:20 GMT+03:00 Mike Wolman <mike at wolman.co.uk
> <mailto:mike at wolman.co.uk>>:
>
> Hi,
>
> I am trying to get FreeBSD working on this board - I think I am
> almost there in getting it working but need some help please.
>
> I have followed instructions from the freebsd-wifi-build and
> *think* I have got everything correct - I am trying to do this on
> a CURRENT setup:
>
> FreeBSD f64-current.mw.office 12.0-CURRENT FreeBSD 12.0-CURRENT #0
> r317887: Sun May 7 03:20:34 UTC 2017
> mike at f64-current.mw.office:/usr/obj/usr/src/sys/GENERIC-NODEBUG amd64
>
>
> $ cat ~/.freebsd-wifi-build-settings.cfg
> X_SKIP_MORE_STUFF=YES
> X_EXTRA_SRC_CONF=~/omega2/src.conf
>
> $ cat ~/omega2/src.conf
> WITHOUT_CLANG=YES
> WITHOUT_CLANG_FULL=YES
>
> get dts files from thread
> http://community.onion.io/topic/1099/openwrt-on-the-omega-2/8
> <http://community.onion.io/topic/1099/openwrt-on-the-omega-2/8>
>
>
> cd ~/omega2/src/sys/gnu/dts/mips
> fetch
> https://raw.githubusercontent.com/WereCatf/source/image/target/linux/ramips/dts/OMEGA2.dtsi
> <https://raw.githubusercontent.com/WereCatf/source/image/target/linux/ramips/dts/OMEGA2.dtsi>
> fetch
> https://raw.githubusercontent.com/WereCatf/source/image/target/linux/ramips/dts/OMEGA2.dts
> <https://raw.githubusercontent.com/WereCatf/source/image/target/linux/ramips/dts/OMEGA2.dts>
> fetch
> https://raw.githubusercontent.com/WereCatf/source/image/target/linux/ramips/dts/OMEGA2P.dts
> <https://raw.githubusercontent.com/WereCatf/source/image/target/linux/ramips/dts/OMEGA2P.dts>
>
> X_DTS_FILE=OMEGA2P.dts KERNCONF=MT7628_FDT
> ../freebsd-wifi-build/build/bin/build ralink buildworld
> X_DTS_FILE=OMEGA2P.dts KERNCONF=MT7628_FDT
> ../freebsd-wifi-build/build/bin/build ralink buildkernel
> X_DTS_FILE=OMEGA2P.dts KERNCONF=MT7628_FDT
> ../freebsd-wifi-build/build/bin/build ralink installworld
> X_DTS_FILE=OMEGA2P.dts KERNCONF=MT7628_FDT
> ../freebsd-wifi-build/build/bin/build ralink installkernel
> X_DTS_FILE=OMEGA2P.dts KERNCONF=MT7628_FDT
> ../freebsd-wifi-build/build/bin/build ralink distribution
>
>
> X_DTS_FILE=OMEGA2P.dts KERNCONF=MT7628_FDT
> ../freebsd-wifi-build/build/bin/build ralink mfsroot
> X_DTS_FILE=OMEGA2P.dts KERNCONF=MT7628_FDT
> ../freebsd-wifi-build/build/bin/build ralink fsimage
> X_DTS_FILE=OMEGA2P.dts KERNCONF=MT7628_FDT
> ../freebsd-wifi-build/build/bin/build ralink uboot
>
>
> Create flash:
>
> X_FLASH=kernel.MT7628_FDT.lzma.flash
> dd if=/dev/zero bs=$(( 0x200000 )) count=1 of=${X_FLASH}
> dd if=kernel.MT7628_FDT.lzma.uImage of=${X_FLASH} conv=notrunc
> dd if= mfsroot-ralink.img.lzma >> ${X_FLASH}
>
>
> $ readelf -h kernel.MT7628_FDT | grep Entry
> Entry point address: 0x80001100
>
>
>
>
> Now on the omega over serial - I didnt get the network expansion
> doc thing so am doing stuff with usb rather than tftp
>
> I am not 100% sure about the 0x80001100 and the fatload and have
> tried this
>
> Omega2 # fatload usb 0:1 0x80001100 /kernel.MT7628_FDT.lzma.flash
> *
> *
> Reading file "/kernel.MT7628_FDT.lzma.flash"
> *
> **
> **
> **
> ******
> *********************************************************************************************************************************************
> ******
> *
> FAT: 2108463 Bytes read
> Omega2 # bootm 0x80001100
> ## Booting image at 80001100 ...
> Image Name: FreeBSD
> Image Type: MIPS Linux Kernel Image (lzma compressed)
> Data Size: 1365122 Bytes = 1.3 MB
> Load Address: fffffff2
> Entry Point: fffffff2
> Verifying Checksum ... OK
> Uncompressing Kernel Image ...
>
>
> At this point nothing happens and console hangs - note in
> OMEGA2.dtsithe console is set to ttyS0:
>
> bootargs = "console=ttyS0,115200";
>
>
>
>
> I have also tried with just kernel.MT7628_FDT and
> kernel.MT7628_FDT.lzma but both fail:
>
> Omega2 # fatload usb 0:1 0x80001100 /kernel.MT7628_FDT.lzma.uImage
> *
> *
> Reading file "/kernel.MT7628_FDT.lzma.uImage"
> *
> **
> **
> ******
> ******************************************************************************************************************************
> **********
> *
> FAT: 1365186 Bytes read
> Omega2 # bootm 0x80001100
> ## Booting image at 80001100 ...
> Image Name: FreeBSD
> Image Type: MIPS Linux Kernel Image (lzma compressed)
> Data Size: 1365122 Bytes = 1.3 MB
> Load Address: fffffff2
> Entry Point: fffffff2
> Verifying Checksum ... OK
> Uncompressing Kernel Image ...
>
>
> A few comments on the hardware for anyone who wants to get one:
>
> Get the expansion dock with serial port access - the power dock
> does not provide serial access - i think it is possible to use an
> ftdi ttl serial chip/cable but have not tried.
>
> Stupidly I forgot this only has wifi access so you are not able to
> tftp boot this without getting the ethernet network expansion but
> loading stuff up from a usb memory stick is seem fine from u-boot.
>
> I do not think that it is possible to boot from the SD card on the
> Omega2+ - which is a shame.
>
> Thanks for reading,
>
> Mike.
>
>
>
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>
>
> --
> WBW
> -------
> Rybalko Aleksandr <ray at ddteam.net <mailto:ray at ddteam.net>>
>
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