Enum BarInfo

pub enum BarInfo {
    Memory {
        address_type: MemoryBarType,
        prefetchable: bool,
        address: u64,
        size: u32,
        virtaddress: u64,
    },
    IO {
        address: u32,
        size: u32,
    },
    Unused,
}

Information about a PCI Base Address Register. BAR的三种类型 Memory/IO/Unused

Variants

Memory

The BAR is for a memory region.

Fields

address_type: MemoryBarType

The size of the BAR address and where it can be located.

prefetchable: bool

If true, then reading from the region doesn’t have side effects. The CPU may cache reads and merge repeated stores.

address: u64

The memory address, always 16-byte aligned.

size: u32

The size of the BAR in bytes.

virtaddress: u64

The virtaddress for a memory bar(mapped).

IO

The BAR is for an I/O region.

Fields

address: u32

The I/O address, always 4-byte aligned.

size: u32

The size of the BAR in bytes.

Unused

Implementations

impl BarInfo

pub fn memory_address_size(&self) -> Option<(u64, u32)>

Returns the address and size of this BAR if it is a memory bar, or None if it is an IO BAR. @brief 得到某个bar的memory_address与size(前提是他的类型为Memory Bar) @param self @return Option<(u64, u32) 是Memory Bar返回内存地址与大小，不是则返回None

pub fn virtual_address(&self) -> Option<u64>

@brief 得到某个bar的virtaddress(前提是他的类型为Memory Bar) @param self @return Option<(u64) 是Memory Bar返回映射的虚拟地址，不是则返回None

Trait Implementations

impl Clone for BarInfo

fn clone(&self) -> BarInfo

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BarInfo

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for BarInfo

实现BarInfo的Display trait，自定义输出

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for BarInfo

fn eq(&self, other: &BarInfo) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for BarInfo

impl StructuralPartialEq for BarInfo