Hi Alex > -----Original Message----- > From: Alexander Graf [mailto:[email protected]] > Sent: Monday, January 15, 2018 2:45 PM > To: Udit Kumar <[email protected]> > > Hi Udit, > > On 15.01.18 10:09, Udit Kumar wrote: > > Hi Alex, > > Hope you are doing great, > > > > Could you help on UEFI over the u-boot. > > 1- I couldn't locate EFI_DXE_SERVICES in u-boot, do you have plan to > > add those > > Right now the model is that all device drivers are implemented by U-Boot > and that only exposes their interfaces to EFI applications. Implementing DXE > in U-Boot would open quite a big can of worms, as it would really only be > useful in compilation with PI which is a terrible interface :).
Ok, > > 2- If I load a driver (with bootefi) which install few protocols, is > > this ok to do with u-boot > > It depends on how much the driver does, but in general yes. Heinrich is > currently working on making the iPXE iSCSI driver work, so his EFI payload > would expose an EFI block device to yet another payload running after his. Thanks for this, Heinrich, in this driver, are you accessing underneath hardware register by UEFI-Driver and managing UEFI protocols or you are relying on some h/w access exposed by u-boot driver > > 3- if you say, 2 is ok then I hope these protocols are kept in some > > data base, and this new protocol can be opened by an application > > Yes, the protocol database is now global and persistent across bootefi > invocations. Thanks > > 4- if there is some known limitation, like we cannot run DXE_driver > > etc > > What exactly are you trying to do? With the U-Boot UEFI implementation > we're trying to find a sweet spot between implementing as much as makes > sense, but not the whole UEFI world, as that would just bloat the code > needlessly. I am trying to add a driver (DXE by definition) which a) Access the hardware registers. (I said DXE could due to hardware registers) b) Update memory map as well (AddMemorySpace call) c) Finally it export a protocol, which could be used by its test application. For b) I am not able to find function call, For a), if I say driver is UEFI and accessing hardware register, will this be acceptable ? > > Alex _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
