SG-1000 alternative use

stephenw10

I don't believe there are any Linux builds that will run on the SG-1000 directly. At least there wasn't last time I checked. The SG-1000 is very similar to the Beaglebone Black board but with two significant differences. The SG-1000 has an onboard switch and both NICs are connected via that. the BBB does not. The CPU in the SG-1000 runs 200MHz slower to remain inside the thermal envelope with the additonal components.

But if you are trying this I would start with a BBB image.

Steve

sgw

@stephenw10 @jimp thanks to both of you for your feedback.
I'll see if I take the effort to try a BBB image or just modify the installed 22.05 to my needs. Too bad there is no ready linux image ...

stephenw10

Yup after some testing there is enough upstreamed in FreeBSD that, for example, this image will just work if you boot it from SD. The dtb file describing the sg-1000 hardware is included.

Booting Linux probably requires changing the uboot values at a minimum.

Steve

sgw

@stephenw10 Ah, great, thanks for the pointer. Did you actually try that?

stephenw10

I did:

root@generic:~ # uname -a
FreeBSD generic 12.4-STABLE FreeBSD 12.4-STABLE r372994 GENERIC  arm
root@generic:~ # ifconfig
cpsw0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=8000b<RXCSUM,TXCSUM,VLAN_MTU,LINKSTATE>
        ether 68:9e:19:8c:14:86
        inet6 fe80::6a9e:19ff:fe8c:1486%cpsw0 prefixlen 64 scopeid 0x1
        inet 172.21.16.128 netmask 0xffffff00 broadcast 172.21.16.255
        media: Ethernet autoselect (1000baseT <full-duplex,master>)
        status: active
        nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
cpsw1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=8000b<RXCSUM,TXCSUM,VLAN_MTU,LINKSTATE>
        ether 68:9e:19:8c:14:88
        inet6 fe80::6a9e:19ff:fe8c:1488%cpsw1 prefixlen 64 scopeid 0x2
        media: Ethernet autoselect (none)
        status: no carrier
        nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3
        inet 127.0.0.1 netmask 0xff000000
        groups: lo
        nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL>

sgw

@stephenw10 said in SG-1000 alternative use:

FreeBSD 12.4

will try asap. I assume it's enough to write the img to USB media and then "run usbrecovery" ? thanks!

stephenw10

It probably will run from USB fine. I tested it from a uSD card internally.

You don't need to run anything from uboot. The envs in the SG-1000 will try to boot from both USB and SD card before eMMC.

jimp

You'll probably need to write that to an SD card, open the case and put the card in, and put a jumper on the SD boot pins so it will boot from SD.

That or you can boot from USB and manually write that image to the mmc, but using SD is probably a better move.

stephenw10

I actually found it won't boot from the SD card directly, using the jumper. The uboot version in the image doesn't seem to be compatible. I forget exactly what changes we did there.

Without the jumper it runs uboot from eMMC then loads ubldr.bin from the SD card and boots that.

jimp

Ah, yeah that might help. Probably a difference in how I made my FreeBSD image since my MMC is dead so I couldn't rely on its u-boot.

When I made the SD card image I use there was a way to inject a specific u-boot into it with dd and I used the u-boot I copied out of the existing 1000 image.

I can't remember which page had the instructions for that but it's under https://wiki.freebsd.org/arm/ somewhere.

Personally I'm more comfortable knowing it is 100% on SD so it's a consistent environment.

sgw

oh, that seems complicated ;-)
Tried to write the img to a SD card, inserted it ... had to choose a boot device ... not really successful so far.

As I understand you, the image won't boot this way. Reading the docs I learn that the jumper isn't there per default. So I wonder if I need one ... and I wonder if I have to insert that uboot somehow.

That is a bit too much for me right now, I have to wait for a free time slot to attack this from start. Thanks anyway for your help.

stephenw10

I would expect it to boot that if a uboot image is present and readable on the eMMC.

It looks like this:

U-Boot SPL 2016.03 (Jul 18 2019 - 08:00:56)
Trying to boot from MMC
Card doesn't support part_switch
MMC partition switch failed
*** Warning - MMC partition switch failed, using default environment

reading u-boot.img
reading u-boot.img


U-Boot 2016.03 (Jul 18 2019 - 08:00:56 -0400)

       Watchdog enabled
I2C:   ready
DRAM:  512 MiB
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1
reading u-boot.env

** Unable to read "u-boot.env" from mmc0:1 **
Using default environment

Net:   <ethaddr> not set. Validating first E-fuse MAC
cpsw, usb_ether
starting USB...
USB0:   Port not available.
** Bad device usb 0 **
Hit any key to stop autoboot:  0
Booting from: mmc 0 ubldr.bin
reading ubldr.bin
386136 bytes read in 32 ms (11.5 MiB/s)
## Starting application at 0x88000000 ...
Consoles: U-Boot console
Compatible U-Boot API signature found @0x9ef3bb58

FreeBSD/armv7 U-Boot loader, Revision 1.2

DRAM: 512MB
Number of U-Boot devices: 3
U-Boot env: loaderdev='mmc 0'
Found U-Boot device: disk
  Checking unit=0 slice=<auto> partition=<auto>... good.
Booting from disk0s2a:
Loading /boot/defaults/loader.conf
Loading /boot/defaults/loader.conf
Loading /boot/device.hints
Loading /boot/loader.conf
Loading /boot/loader.conf.local
Loading kernel...
/boot/kernel/kernel text=0x1b4 text=0x735378 text=0x185aec data=0xa52b0 data=0x0+0x1f0000 syms=[0x4+0xa6ff0+0x4+0x109fc4]
Loading configured modules...
/boot/kernel/umodem.ko text=0x14c0 text=0xed0 data=0x22c+0x4 syms=[0x4+0xe10+0x4+0xa4f]
loading required module 'ucom'
/boot/kernel/ucom.ko text=0x1714 text=0x2cbc data=0x3c4+0x838 syms=[0x4+0x13e0+0x4+0xbac]
/boot/entropy size=0x1000
/etc/hostid size=0x25

Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
/boot/dtb/ufw.dtb size=0x12b06
Loaded DTB from file 'ufw.dtb'.
Kernel entry at 0x88400200...
Kernel args: (null)
---<<BOOT>>---
Copyright (c) 1992-2021 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 12.4-STABLE r372994 GENERIC arm
FreeBSD clang version 13.0.0 (git@github.com:llvm/llvm-project.git llvmorg-13.0.0-0-gd7b669b3a303)

sgw

@stephenw10 forgive me following up this old thread. I actually didn't try anything related since back then.

Now with my failed beta-upgrade etc I want to set up some minimal appliance just to get me online again quickly for rescue research etc ;-)

I am currently running a firmware recovery to one of these SG-1000 boxes. The file used brings pfSense Plus 21.02p1 ... I am not sure if I could get anything later by filing a ticket, but anyway: even the latest release for that platform is unsupported (and unsafe?) for a long time now.

The recovery stick boots and writes stuff to the internal SD (?) mmcsd1. Is that correct? Because it takes a while, shuts down, tells me to remove the recovery stick and cycle the power. After that no booting ...

EDIT: ah, remove that extra SD. Now: mmcsd0

stephenw10

You can get a 22.05 recovery image but that was the last version that built for it. You should still be able to upgrade to that too.