Re: U-Boot as ARM Coreboot Payload (for Chromebook Duet)
Hi Dennis, On Mon, 3 Aug 2020 at 11:08, Dennis Gilmore wrote: > > Simon, > > Is there a way to replace the firmware on those boards with u-boot? I > have a Tegra, a rockchip, and a pair of Samsung Exynos based > Chromebooks that are end of life for ChromeOS but are still quite > useful hardware platforms if there was a way to replace entirely the > bootloader with u-boot I could have hardware running supported > operating systems. Yes you can do that, likely with all of those you mention, although the Samsung may already use U-Boot. You can flash an image on the device's command line. The problem is getting back if you brick it. You need a servo board to be able to reflash it. Regards, Simon > > Dennis > > On Sun, Aug 2, 2020 at 10:00 PM Simon Glass wrote: > > > > Hi Matthew, > > > > On Sun, 2 Aug 2020 at 20:17, Matthew Grochowalski wrote: > > > > > > Hello, > > > > > > Reading > > > https://chromium.googlesource.com/chromiumos/docs/+/master/developer_mode.md, > > > it appears U-Boot should work as an alternate firmware on new ARM > > > Chromebooks. > > > > > > Trying on my Duet (Kukui/Krane), this doesn't work. Looking at the > > > RW_LEGACY contents, there's basically nothing there from the factory. > > > > > > I tried "make coreboot_defconfig" from u-boot master, but it looks > > > like this is x86 only. > > > > > > Any way to get this working on ARM(64)? > > > > I think this is Mediatek and U-Boot doesn't have support for that > > particular MT part, at least in mainline. I suspect it will happen at > > some point. > > > > The altfw U-Boot feature works on x86 Chromebooks only, at present. > > That said, most tegra and rockchip Chromebooks support U-Boot running > > 'bare-metal'. > > > > Regards, > > Simon
Re: U-Boot as ARM Coreboot Payload (for Chromebook Duet)
Simon, Is there a way to replace the firmware on those boards with u-boot? I have a Tegra, a rockchip, and a pair of Samsung Exynos based Chromebooks that are end of life for ChromeOS but are still quite useful hardware platforms if there was a way to replace entirely the bootloader with u-boot I could have hardware running supported operating systems. Dennis On Sun, Aug 2, 2020 at 10:00 PM Simon Glass wrote: > > Hi Matthew, > > On Sun, 2 Aug 2020 at 20:17, Matthew Grochowalski wrote: > > > > Hello, > > > > Reading > > https://chromium.googlesource.com/chromiumos/docs/+/master/developer_mode.md, > > it appears U-Boot should work as an alternate firmware on new ARM > > Chromebooks. > > > > Trying on my Duet (Kukui/Krane), this doesn't work. Looking at the > > RW_LEGACY contents, there's basically nothing there from the factory. > > > > I tried "make coreboot_defconfig" from u-boot master, but it looks > > like this is x86 only. > > > > Any way to get this working on ARM(64)? > > I think this is Mediatek and U-Boot doesn't have support for that > particular MT part, at least in mainline. I suspect it will happen at > some point. > > The altfw U-Boot feature works on x86 Chromebooks only, at present. > That said, most tegra and rockchip Chromebooks support U-Boot running > 'bare-metal'. > > Regards, > Simon
U-Boot as ARM Coreboot Payload (for Chromebook Duet)
Hello, Reading https://chromium.googlesource.com/chromiumos/docs/+/master/developer_mode.md, it appears U-Boot should work as an alternate firmware on new ARM Chromebooks. Trying on my Duet (Kukui/Krane), this doesn't work. Looking at the RW_LEGACY contents, there's basically nothing there from the factory. I tried "make coreboot_defconfig" from u-boot master, but it looks like this is x86 only. Any way to get this working on ARM(64)? Thanks, --Matt
Re: U-Boot as ARM Coreboot Payload (for Chromebook Duet)
Hi Matthew, On Sun, 2 Aug 2020 at 20:17, Matthew Grochowalski wrote: > > Hello, > > Reading > https://chromium.googlesource.com/chromiumos/docs/+/master/developer_mode.md, > it appears U-Boot should work as an alternate firmware on new ARM > Chromebooks. > > Trying on my Duet (Kukui/Krane), this doesn't work. Looking at the > RW_LEGACY contents, there's basically nothing there from the factory. > > I tried "make coreboot_defconfig" from u-boot master, but it looks > like this is x86 only. > > Any way to get this working on ARM(64)? I think this is Mediatek and U-Boot doesn't have support for that particular MT part, at least in mainline. I suspect it will happen at some point. The altfw U-Boot feature works on x86 Chromebooks only, at present. That said, most tegra and rockchip Chromebooks support U-Boot running 'bare-metal'. Regards, Simon
