Hi, Does this work for you? https://edk2-docs.gitbook.io/edk-ii-uefi-driver-writer-s-guide/18_pci_driver_design_guidelines/readme.5
On Mon, Jun 13, 2022 at 8:39 PM M.T. <xzavierpo...@gmail.com> wrote: > Hello > > I'm trying to port some code which interacts with memory mapped hardware > registers. > The original code was developed in 2015-18 on edk2, and does not want to > compile anymore. > > The way it works is there are three 32 bit registers. > The first is a status/command register which I read to determine if the > hardware is ready. > The next two are used to pass a 64-bit memory address (hi + lo). > Once the param registers are set, I update the command/status register and > the hardware executes the command returning the results at the address > provided by the two param registers. > > In the original code, the address of the buffer is used to fill in the two > param registers, and as far as I can tell this worked back then. > When I try to do the same, the address in my pointer is only 32 bits long, > a virtual address, not a physical address. > > Is there a way I can convert this 32 bit virtual address to a 64-bit > physical address in a uefi shell app, or would I need a driver to do this? > I did something similar in linux for memory mapped IO, I am guessing I > just haven't found the right function for this yet. > > I would greatly appreciate it if someone could point me in the right > direction. > > Thank you > xp > > > > > > -- Pedro Falcato -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#90504): https://edk2.groups.io/g/devel/message/90504 Mute This Topic: https://groups.io/mt/91734630/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
