Re: [edk2-devel] How to add a DXE driver to an OVMF image?

[d.meneses@softi9.pt]

[-- Attachment #1: Type: text/plain, Size: 2027 bytes --]

Thank you Andrew for this information.
I set it to *true* cause the builder was asking for a *Depex section*.
Setting it to *false allows QEMU* to boot properly.
Nonetheless, the driver *doesn't seem to be called*... yet.

Concerning Pedro's suggestion (Olá!!!), thank you for pointing me to the DebugLib, I'll look into it.
Nonetheless, I'll need to *use ConInt and ConOut in production*.
I am aware of a DXE program that does it. Maybe I was passed the wrong information and the program is running on another phase...
Anyhow, in theory I'd be able to install the I/O protocols in the DXE phase in order to be able to use them. Right?
The *TerminalDxe.inf* , a *UEFI driver* , states: *Terminal module installs Simple Text Input(ex)/Out protocols for serial devices
*
I think assumed erroneously that the *OvmfX64.fdf* is setting the ordering of the DXE drivers.
After Andrew's answer I realised that may actually be done in the *Depex Section?*
I'll read its specification now in order to better understand how to use it.

Nonetheless, I tried turning it from a *DXE_DRIVER* into a *UEFI_DRIVER* and it's still not natively being listed in EFI Shell's *drivers* command.
I don't see yet how mine differs from *TerminalDxe*. Maybe it's crashing and being unloaded.

Maybe it's simpler than all of this.
My true goal is: my program needs to be shipped with the BIOS image in ROM and run for sure on every boot, with no possibility of being *circumvented*.
I have also read that some DXE drivers are not guaranteed to run if something like fast boot is activated.
Taking that in consideration, what module type should I create to achieve my goal?

Finally, is there any documentation on actual programming using EDK2 ?
Say, which functions can I use to read user input?
Or what dependencies do I have to include as LibraryClasses if I want to use a certain function?
Is reading source code the only way to go ?
I have also used DoxyGen to generate docs, but it's far from ideal.

Cheers,
Diogo

[-- Attachment #2: Type: text/html, Size: 2663 bytes --]