Function shift_and_mask

pci/src/bus.rs:510–512

(value: u32, offset: usize, mask: u32)

}

fn shift_and_mask(value: u32, offset: usize, mask: u32) -> usize {
    ((value >> offset) & mask) as usize
}

// Parse the MMIO address offset to a (bus, device, function, register) tuple.
// See section 7.2.2 PCI Express Enhanced Configuration Access Mechanism (ECAM)