Enum Segment 

pub enum Segment {
    Direct {
        addr: u32,
        cached: Cached,
    },
    Mapped,
    Invalid,
}

Which segment a virtual address falls in, and how it translates.

Variants

Direct

Unmapped: physical address is the virtual one minus the segment base.

Fields

addr: u32

The physical address.

cached: Cached

Whether the access is cached.

Mapped

TLB-mapped: KUSEG, KSSEG or KSEG3. The TLB decides the physical address and the cacheability, from the matching entry’s C field.

Invalid

Not a valid address in this mode: raises an address error before the TLB is consulted.

A distinct variant rather than a TlbFault, because the two produce different exceptions from different vectors. Folding an out-of-range kernel address into a TLB refill would send a user program to the refill handler, where a well-behaved kernel would map the page and hand it the access it was never allowed to make.

Trait Implementations

impl Clone for Segment

fn clone(&self) -> Segment

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Segment

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Segment

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Segment

fn eq(&self, other: &Segment) -> 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 Serialize for Segment

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Segment

impl Eq for Segment

impl StructuralPartialEq for Segment