Regarding FSPs: My mistake. > About the southbridge, I don't know if > Cedarview can use NM10 (found > on Pineview) or if it must use an EG20T PCH:
I noted that the inteltool log mentioned an NM10 On Fri., Mar. 13, 2020, 6:24 a.m. Angel Pons, <[email protected]> wrote: > Hi, > > On Thu, Mar 12, 2020 at 11:07 AM Michal Zygowski > <[email protected]> wrote: > > > > Hi, > > > > it may also be a Cedarview chipset. According to my knowledge there is > > no support for Cedarview chipset in coreboot. However coreboot has > > slightly older (1 year older) chipset support - Pineview. > > Pineview is very different, though. Memory initialization for Pineview > resembles that of Eaglelake (src/northbridge/intel/x4x). Although it > only has one memory channel, the registers in MCHBAR are very similar. > > On the other hand, Cedarview's internal architecture differs radically > from Pineview, and it is actually more like Bay Trail. Both use the > IOSF architecture, and memory is initialized by interacting with > various "units" inside the chip. > > About the southbridge, I don't know if Cedarview can use NM10 (found > on Pineview) or if it must use an EG20T PCH: > > https://ark.intel.com/content/www/us/en/ark/products/52501/intel-platform-controller-hub-eg20t.html > > > My experience is very little when it comes to older chipsets, but > > judging by how sanydbridge and ivybridge works, pineview and cedarview > > should have most thing in common. That said, i would try to go out from > > pineview northbridge in coreboot. The next question is which southbirdge > > to choose. There are two mainboards based on pineview. Most likely you > > would have to select: > > > > select CPU_INTEL_SOCKET_FCBGA559 > > select NORTHBRIDGE_INTEL_PINEVIEW > > select SOUTHBRIDGE_INTEL_I82801GX > > > > in your mainboard Kconfig. The CPU socket also matches according to > > Intel ARK about N2600 > > > > > https://ark.intel.com/content/www/us/en/ark/products/58916/intel-atom-processor-n2600-1m-cache-1-6-ghz.html > > Note that, even though the LGA775 socket was used for many different > CPU generations, not every LGA775 mainboard can take any LGA775 CPU. > > > The initialization for that particular silicon is native so no FSP > > required. Since it may be hard to debug, I advise to get a USB debug > > dongle and enable it in coreboot menuconfig. But before that, find out > > which USB port on this netbook is connected to EHCI debug port. > > Typically it is the first port on the root hub. You can find it out > > using lspci and lsusb in Linux (by connecting a USB-UART dongle for > > example to the investigated port). The dongles supported by coreboot > > are: FTDI232H/FTDI2232H, or you can use BeagleBone board. > > There's also `util/find_usbdebug` in coreboot. > > > Regards, > > > > -- > > Michał Żygowski > > Firmware Engineer > > https://3mdeb.com | @3mdeb_com > > > > On 12.03.2020 06:06, Benjamin Doron wrote: > > > Hi, > > > The Intel FSP (Firmware Support Package) is a required part of chipset > initialisation. I can't find one for Cedar View, (github.com/IntelFsp/FSP) > the family your CPU, an Atom N2600, is a part of. > > There is an old FSP around: QueensBayFspBinPkg. However, it will not > work with current coreboot, as FSP 1.0 support had to be dropped. > > > > Somebody else should confirm (I don't know your platform well), but it > seems impossible about this. Sorry. > > The first MinnowBoard uses a Cedarview chip. There is some ancient EFI > firmware around: > https://github.com/RafaelRMachado/MinnowBoard/tree/master > > There might be something better thank stinky binaries somewhere, but I > don't know if it's still around after eight years... > > > > _______________________________________________ > > > coreboot mailing list -- [email protected] > > > To unsubscribe send an email to [email protected] > > > > _______________________________________________ > > coreboot mailing list -- [email protected] > > To unsubscribe send an email to [email protected] > > Best regards, > > Angel Pons > _______________________________________________ > coreboot mailing list -- [email protected] > To unsubscribe send an email to [email protected] >
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