PageUsage

ostd::specs::mm::frame::meta_owners

Enum PageUsage 

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#[repr(u8)]
pub enum PageUsage {
    Unused = 0,
    Reserved = 1,
    Frame = 2,
    PageTable = 3,
    Meta = 4,
    Kernel = 5,
}

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Unused = 0

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Reserved = 1

The page is reserved or unusable. The kernel should not touch it.

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Frame = 2

The page is used as a frame, i.e., a page of untyped memory.

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PageTable = 3

The page is used by a page table.

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Meta = 4

The page stores metadata of other pages.

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Kernel = 5

The page stores the kernel such as kernel code, data, etc.

Implementations§

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impl PageUsage

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pub open spec fn as_u8_spec(&self) -> u8

{
    match self {
        PageUsage::Unused => 0,
        PageUsage::Reserved => 1,
        PageUsage::Frame => 32,
        PageUsage::PageTable => 64,
        PageUsage::Meta => 65,
        PageUsage::Kernel => 66,
    }
}
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pub exec fn as_u8(&self) -> res : u8

ensures
res == self.as_u8_spec(),
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pub exec fn as_state(&self) -> res : PageState

Trait Implementations§

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impl Clone for PageUsage

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fn clone(&self) -> PageUsage

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for PageUsage

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

Formats the value using the given formatter. Read more
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impl PartialEq for PageUsage

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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impl StructuralPartialEq for PageUsage

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, VERUS_SPEC__A> FromSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: From<T>,

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fn obeys_from_spec() -> bool

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fn from_spec(v: T) -> VERUS_SPEC__A

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, VERUS_SPEC__A> IntoSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: Into<T>,

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fn obeys_into_spec() -> bool

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fn into_spec(self) -> T

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impl<T, U> IntoSpecImpl<U> for T
where U: From<T>,

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fn obeys_into_spec() -> bool

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fn into_spec(self) -> U

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impl<A, Rhs> PartialEqIs<Rhs> for A
where A: PartialEq<Rhs> + ?Sized, Rhs: ?Sized,

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

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

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impl<Rhs, VERUS_SPEC__A> PartialEqSpec<Rhs> for VERUS_SPEC__A
where VERUS_SPEC__A: PartialEq<Rhs> + ?Sized, Rhs: ?Sized,

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fn obeys_eq_spec() -> bool

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

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, VERUS_SPEC__A> TryFromSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: TryFrom<T>,

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fn obeys_try_from_spec() -> bool

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fn try_from_spec( v: T, ) -> Result<VERUS_SPEC__A, <VERUS_SPEC__A as TryFrom<T>>::Error>

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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T, VERUS_SPEC__A> TryIntoSpec<T> for VERUS_SPEC__A
where VERUS_SPEC__A: TryInto<T>,

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fn obeys_try_into_spec() -> bool

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fn try_into_spec(self) -> Result<T, <VERUS_SPEC__A as TryInto<T>>::Error>

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impl<T, U> TryIntoSpecImpl<U> for T
where U: TryFrom<T>,

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fn obeys_try_into_spec() -> bool

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fn try_into_spec(self) -> Result<U, <U as TryFrom<T>>::Error>