On 04/17/18 10:15, Udit Kumar wrote: > Hi Laszlo, > > Considering all possible option is best to have in code 😊 > But IMO, We are running UEFI on LE CPU only, Not sure someone is running on > BE. AFAIK even specs says LE. > >> (c) assuming we introduce a CPU with BE byte order, the same driver >> source will work (for both LE and BE devices), only the lib >> instances will have to be switched around. (This might even happen >> dynamically, via function pointers.) > > I assume , when we say CPU in BE , this means we are talking here new CPU > architecture > and new SOC. So I expect some changes in hardware IP as well. > If not then, I see still this working with patch of Leif > > Like > CPU (LE,) Driver (LE) Uses Mmio > CPU (LE,) Driver (BE) Uses BeMmio (Mmio with swap) > > CPU (BE,) Driver (LE) Uses Mmio (Does read and Swap) <-- This will be new > Mmio Lib for particular architecture > CPU (BE,) Driver (BE) Uses BeMmio (Mmio with swap) <-- Swap of swap will > make same value > > With this, I see driver code is same irrespective of CPU arch > > thoughts ?
Apparently I've needlessly complicated things already. Feel free to proceed as you see fit. Laszlo _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
