Date: Thu, 24 Mar 2016 10:00:05 +0200 From: Daniel Braniss <danny@cs.huji.ac.il> To: Ian Lepore <ian@FreeBSD.org> Cc: Russell Haley <russ.haley@gmail.com>, Ilya Bakulin <ilya@bakulin.de>, freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: about netbooting on armv6 [was: Fwd: SDIO Patch D4761.diff Not Building For Me] Message-ID: <D20A4045-E834-433A-8AC7-8029C978C7C0@cs.huji.ac.il> In-Reply-To: <1458751414.1091.47.camel@freebsd.org> References: <CABx9NuRq4ZKrHEPkf%2BNRLxjdg9e%2B=FHUfi_7Q4HrRT4C_oMNQg@mail.gmail.com> <b85f676d6c1150e8e7384433f7983f7b@bakulin.de> <CABx9NuTEiOPEH6JaU-HDgvPwRSu_CTYb7643fV=10AY6uiyRkQ@mail.gmail.com> <ce69cba9e622e8ea5048d012d65e4908@bakulin.de> <CABx9NuT8Fc6JvAD75vaijAQ2C8%2BKuY0Yw4BENcrhYAMP4fqWnw@mail.gmail.com> <CABx9NuS9%2BEWVFV8jfpcYc2OEe7%2BUWfa4uGiQ7vg7_RPXxNnhzQ@mail.gmail.com> <CABx9NuQuDVOZJt7%2B%2BK0cY%2B7oDLRkhrWmZ5WoNqFdTEMhZ0zQQQ@mail.gmail.com> <CABx9NuRXWEY%2BsBQN==q5YSaPU0f-o_pLQCpQOw1e32w=R0nPsg@mail.gmail.com> <CABx9NuSMK-X%2BvzTBH4bVsFLDFwWuF49t5JU7mzqVErDOMXGEzA@mail.gmail.com> <5432b449f37a481bc7099fbab25fbd2e@bakulin.de> <CABx9NuQKTFWUoTr2ufXANDo6C2AwLiYC7wd_5wSUg9J7M1Rofg@mail.gmail.com> <CABx9NuRTao6YhdzKPONwKgzfeAN80UmQ060QTf%2Buv18gkHogtg@mail.gmail.com> <CABx9NuSaWNX3qEwmGdpez-qf8GEjH4%2Bvd3y9tuR1ogZBDzsAng@mail.gmail.com> <a4a95b7a9617eea06212c50ec23bf5cc@bakulin.de> <CABx9NuQLbWjK8DfBLPDcRX9Bb1MY5Bk=TRDW_Fx63uP9orT2Og@mail.gmail.com> <1458751414.1091.47.camel@freebsd.org>
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> On 23 Mar 2016, at 18:43, Ian Lepore <ian@FreeBSD.org> wrote: > > On Wed, 2016-03-23 at 09:09 -0700, Russell Haley wrote: >> On Wed, Mar 23, 2016 at 4:00 AM, Ilya Bakulin <ilya@bakulin.de> >> wrote: >>> On 2016-03-23 06:16, Russell Haley wrote: >>>> >>>> Hi Ilya, >>>> >>>> Mixed success tonight. I tried to install the kernel but got an >>>> error: >>> >>> >>> You should give MODULES_OVERRIDE= to installkernel as well. >>> >> Great, Thank you. >>>> >>>> Well, it booted the kernel and then spewed output and eventually >>>> ended >>>> with a failed DHCP request (?). Here is the pastebin of said >>>> output. >>>> >>> >>> I never copy the newly built kernel to the SD card. >>> Instead I configure U-Boot+ubldr to boot kernel from TFTP and mount >>> root >>> over NFS, it's much faster and it's impossible to crash filesystem >>> if the >>> kernel crashes. >>> I guess you should set ROOTDEVNAME manually in the kernel config >>> file and >>> disable NFSCLIENT-related options. >> >> Thanks for this advice. I have had something similar working before >> (I >> had rootfs on USB) so should be able to get that running this weekend >> >>> From your boot log it's clear that the system boots and probes SD >>> cards. >> >> Yes, very exciting to see!!! I will be looking to try and match debug >> output with code paths asap. >> >>> There are two slots and none of them has SDIO card in it. >>> From what I find about Hummingboard, it actually doesn't have WiFi >>> SDIO >>> chips on it. >> >> I don't understand. It was booted using an SD card? Also, here is the >> information about the board and the Wi-Fi (the Solid-Run site can be >> hard to navigate): >> >> Carrier Board spec: >> http://wiki.solid-run.com/doku.php?id=products:imx6:hummingboard:hbpr >> o >> >> This is my SOM: >> http://wiki.solid-run.com/doku.php?id=products:imx6:microsom:dual&s[] >> =bcm4330 >> >> Schematic. I believe page 5 shows the SDIO WIFI module interface? >> http://wiki.solid-run.com/lib/exe/fetch.php?media=imx6:microsom:docs: >> sr-usom-mx6-rev-1_3-simplified-schematics.pdf >> >> Broadcom BCM4330 >> http://linux-sunxi.org/images/0/05/4330-DS206-R.pdf >> >> I have used it successfully through Kodi and Debian (Raspbian >> specifically) >> >> Thanks, >> Russ > > The quick and easy config for netbooting armv6 these days is to set a > few vars in your uboot env. This assumes that you let uboot load > ubldr.bin from sdcard, and then have ubldr load the kernel and the > kernel will mount nfsroot. > > If you have a dhcp server to provide an IP, this is all you need in > uboot env: > > loaderdev=net > rootpath=<nfs server ip>:/<rootpath> you can set the footpath via dhcp / dhcpd.conf: option root-path “nfs:ip.root.host:/path-to-root”; > > If you manually configure the ip, add these: > > ipaddr=<ip addr> > netmask=255.etc.etc.etc > > When ubldr loads the kernel via nfs, it also sets up all the info > needed to mount root via nfs and passes the info to the kernel in env > vars. It will also set vfs.root.mountfrom to the server:path you set > in the rootpath var in uboot, which gets the initial root fs mount > done. You still need an /etc/fstab that also has the nfs mount info > for the nfsroot, so that the rc scripts can remount root writable. > > All you need in the kernel config is options NFSCL, NFSLOCKD, NFS_ROOT > and all of those are already standard in all armv6 kernels. You don't > need to change the ROOTDEVNAME option because the vfs.root.mountfrom > overrides it (ROOTDEVNAME is used as a fallback if the nfs mount > fails). > > -- Ian > > _______________________________________________ > freebsd-arm@freebsd.org <mailto:freebsd-arm@freebsd.org> mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-arm <https://lists.freebsd.org/mailman/listinfo/freebsd-arm>; > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org <mailto:freebsd-arm-unsubscribe@freebsd.org>"
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