AHCI driver error on qemu

[MikyBart]

Hi all, I wrote an ahci driver for my kernel in assembly (nasm).
when I run qemu, the kernel in the initialization of the ahci driver does not hang but in exit qemu gives me the following error:

Code: Select all

qemu: AHCI: Failed to start FIS receive engine: bad FIS receive buffer address

so that the buffer must be in physical memory and not virtual.

What can I do to overcome this problem?

thanks to all.

[Octocontrabass]

Put a valid physical address in the PxFB and PxFBU registers.