This repository contains a PCI Device for QEMU and a driver for it.
The PCI devices comes with two memory space BARs. BAR1 is 4kB in size and offers memory storage. Values written to it, will be stored and can be read back.
BAR0 is also memory space and is diveded in four 4 Byte registers according to the following table:
| Offset | Name | Default Value | Description |
|---|---|---|---|
| 0x0 | ID | 0xcafeaffe | ID for identification |
| 0x4 | INVERT | 0 | The inverted writen value can be read back |
| 0x8 | IRQ CTRL | 0 | Can be used to fire and acknowledge IRQs |
| 0xC | RANDOM VAL | 0 | Returns a random value on read |
Tbd.
implementation of a custom QEMU PCI device by Nikos Mouzakitis