Struct PciConfig 

pub struct PciConfig {
    ecam_base: usize,
}

PCI configuration space accessor

Provides safe access to PCI configuration space through ECAM mapping.

Fields

ecam_base: usize

Base address of ECAM region

Implementations

impl PciConfig

pub const fn new(ecam_base: usize) -> Self

Create a new PCI configuration accessor

Arguments

• ecam_base - Physical base address of the ECAM region

Safety

The caller must ensure that the ECAM base address is valid and mapped.

fn config_address(&self, addr: &PciAddress, offset: usize) -> usize

Calculate the physical address for a configuration register

pub fn read_u32(&self, addr: &PciAddress, offset: usize) -> u32

Read a 32-bit value from PCI configuration space

Arguments

• addr - PCI device address
• offset - Offset within configuration space (must be 4-byte aligned)

Returns

The 32-bit value read from configuration space

Safety

This performs a volatile MMIO read. The caller must ensure the address is valid.

pub fn write_u32(&self, addr: &PciAddress, offset: usize, value: u32)

Write a 32-bit value to PCI configuration space

Arguments

• addr - PCI device address
• offset - Offset within configuration space (must be 4-byte aligned)
• value - Value to write

Safety

This performs a volatile MMIO write. The caller must ensure the address is valid.

pub fn read_u16(&self, addr: &PciAddress, offset: usize) -> u16

Read a 16-bit value from PCI configuration space

Arguments

• addr - PCI device address
• offset - Offset within configuration space (must be 2-byte aligned)

Returns

The 16-bit value read from configuration space

pub fn write_u16(&self, addr: &PciAddress, offset: usize, value: u16)

Write a 16-bit value to PCI configuration space

Arguments

• addr - PCI device address
• offset - Offset within configuration space (must be 2-byte aligned)
• value - Value to write

pub fn read_u8(&self, addr: &PciAddress, offset: usize) -> u8

Read an 8-bit value from PCI configuration space

Arguments

• addr - PCI device address
• offset - Offset within configuration space

Returns

The 8-bit value read from configuration space

pub fn write_u8(&self, addr: &PciAddress, offset: usize, value: u8)

Write an 8-bit value to PCI configuration space

Arguments

• addr - PCI device address
• offset - Offset within configuration space
• value - Value to write

pub fn read_vendor_id(&self, addr: &PciAddress) -> u16

Read vendor ID

pub fn read_device_id(&self, addr: &PciAddress) -> u16

Read device ID

pub fn read_class_code(&self, addr: &PciAddress) -> u32

Read class code (24-bit: base class, sub class, interface)

pub fn read_header_type(&self, addr: &PciAddress) -> u8

Read header type