Struct LegacyIoAccess

pub struct LegacyIoAccess;

Legacy I/O port PCI configuration access (0xCF8/0xCFC).

Uses standalone assembly (pci_io.S) for reliable I/O port access without compiler optimization interference.

Implementations

impl LegacyIoAccess

pub fn new() -> Self

Create a new legacy I/O accessor.

pub fn test_io_ports() -> bool

Test if PCI I/O ports are working. Returns true if the enable bit (bit 31) is readable after write.

Trait Implementations

impl ConfigAccess for LegacyIoAccess

unsafe fn read32(&self, device: DeviceFunction, offset: u8) -> u32

Read a 32-bit value from configuration space.

unsafe fn write32(&self, device: DeviceFunction, offset: u8, value: u32)

Write a 32-bit value to configuration space.

unsafe fn read16(&self, device: DeviceFunction, offset: u8) -> u16

Read a 16-bit value from configuration space.

unsafe fn read8(&self, device: DeviceFunction, offset: u8) -> u8

Read an 8-bit value from configuration space.

impl Default for LegacyIoAccess

fn default() -> Self

Returns the “default value” for a type.