Struct page_table_entry::aarch64::DescriptorAttr

pub struct DescriptorAttr(_);

Available on AArch64 only.

Memory attribute fields in the VMSAv8-64 translation table format descriptors.

Implementations

impl DescriptorAttr

pub const VALID: Self = _

Whether the descriptor is valid.

pub const NON_BLOCK: Self = _

The descriptor gives the address of the next level of translation table or 4KB page. (not a 2M, 1G block)

pub const ATTR_INDX: Self = _

Memory attributes index field.

pub const NS: Self = _

Non-secure bit. For memory accesses from Secure state, specifies whether the output address is in Secure or Non-secure memory.

pub const AP_EL0: Self = _

Access permission: accessable at EL0.

pub const AP_RO: Self = _

Access permission: read-only.

pub const INNER: Self = _

Shareability: Inner Shareable (otherwise Outer Shareable).

pub const SHAREABLE: Self = _

Shareability: Inner or Outer Shareable (otherwise Non-shareable).

pub const AF: Self = _

The Access flag.

pub const NG: Self = _

The not global bit.

pub const CONTIGUOUS: Self = _

Indicates that 16 adjacent translation table entries point to contiguous memory regions.

pub const PXN: Self = _

The Privileged execute-never field.

pub const UXN: Self = _

The Execute-never or Unprivileged execute-never field.

pub const PXN_TABLE: Self = _

PXN limit for subsequent levels of lookup.

pub const XN_TABLE: Self = _

XN limit for subsequent levels of lookup.

pub const AP_NO_EL0_TABLE: Self = _

Access permissions limit for subsequent levels of lookup: access at EL0 not permitted.

pub const AP_NO_WRITE_TABLE: Self = _

Access permissions limit for subsequent levels of lookup: write access not permitted.

pub const NS_TABLE: Self = _

For memory accesses from Secure state, specifies the Security state for subsequent levels of lookup.

impl DescriptorAttr

pub const fn empty() -> Self

Returns an empty set of flags.

pub const fn all() -> Self

Returns the set containing all flags.

pub const fn bits(&self) -> u64

Returns the raw value of the flags currently stored.

pub const fn from_bits(bits: u64) -> Option<Self>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

pub const fn from_bits_truncate(bits: u64) -> Self

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

pub const fn from_bits_retain(bits: u64) -> Self

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

pub fn from_name(name: &str) -> Option<Self>

Get the value for a flag from its stringified name.

Names are case-sensitive, so must correspond exactly to the identifier given to the flag.

pub const fn iter(&self) -> Iter

Iterate over enabled flag values.

pub const fn iter_names(&self) -> IterRaw

Iterate over enabled flag values with their stringified names.

pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

pub const fn is_all(&self) -> bool

Returns true if all flags are currently set.

pub const fn intersects(&self, other: Self) -> bool

Returns true if there are flags common to both self and other.

pub const fn contains(&self, other: Self) -> bool

Returns true if all of the flags in other are contained within self.

pub fn insert(&mut self, other: Self)

Inserts the specified flags in-place.

pub fn remove(&mut self, other: Self)

Removes the specified flags in-place.

pub fn toggle(&mut self, other: Self)

Toggles the specified flags in-place.

pub fn set(&mut self, other: Self, value: bool)

Inserts or removes the specified flags depending on the passed value.

pub const fn intersection(self, other: Self) -> Self

Returns the intersection between the flags in self and other.

Specifically, the returned set contains only the flags which are present in both self and other.

This is equivalent to using the & operator (e.g. ops::BitAnd), as in flags & other.

pub const fn union(self, other: Self) -> Self

Returns the union of between the flags in self and other.

Specifically, the returned set contains all flags which are present in either self or other, including any which are present in both (see Self::symmetric_difference if that is undesirable).

This is equivalent to using the | operator (e.g. ops::BitOr), as in flags | other.

pub const fn difference(self, other: Self) -> Self

Returns the difference between the flags in self and other.

Specifically, the returned set contains all flags present in self, except for the ones present in other.

It is also conceptually equivalent to the “bit-clear” operation: flags & !other (and this syntax is also supported).

This is equivalent to using the - operator (e.g. ops::Sub), as in flags - other.

pub const fn symmetric_difference(self, other: Self) -> Self

Returns the symmetric difference between the flags in self and other.

Specifically, the returned set contains the flags present which are present in self or other, but that are not present in both. Equivalently, it contains the flags present in exactly one of the sets self and other.

This is equivalent to using the ^ operator (e.g. ops::BitXor), as in flags ^ other.

pub const fn complement(self) -> Self

Returns the complement of this set of flags.

Specifically, the returned set contains all the flags which are not set in self, but which are allowed for this type.

Alternatively, it can be thought of as the set difference between Self::all() and self (e.g. Self::all() - self)

This is equivalent to using the ! operator (e.g. ops::Not), as in !flags.

Trait Implementations

impl Binary for DescriptorAttr

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

Formats the value using the given formatter.

impl BitAnd<DescriptorAttr> for DescriptorAttr

fn bitand(self, other: Self) -> Self

Returns the intersection between the two sets of flags.

type Output = DescriptorAttr

The resulting type after applying the & operator.

impl BitAndAssign<DescriptorAttr> for DescriptorAttr

fn bitand_assign(&mut self, other: Self)

Disables all flags disabled in the set.

impl BitFlags for DescriptorAttr

type Bits = u64

The underlying integer type.

type Iter = Iter

An iterator over enabled flags in an instance of the type.

type IterNames = IterRaw

An iterator over the raw names and bits for enabled flags in an instance of the type.

fn empty() -> Self

Returns an empty set of flags.

fn all() -> Self

Returns the set containing all flags.

fn bits(&self) -> u64

Returns the raw value of the flags currently stored.

fn from_bits(bits: u64) -> Option<DescriptorAttr>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

fn from_bits_truncate(bits: u64) -> DescriptorAttr

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

fn from_bits_retain(bits: u64) -> DescriptorAttr

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

fn from_name(name: &str) -> Option<DescriptorAttr>

Get the flag for a particular name.

fn iter(&self) -> Self::Iter

Iterate over enabled flag values.

fn iter_names(&self) -> Self::IterNames

Iterate over the raw names and bits for enabled flag values.

fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

fn is_all(&self) -> bool

Returns true if all flags are currently set.

fn intersects(&self, other: DescriptorAttr) -> bool

Returns true if there are flags common to both self and other.

fn contains(&self, other: DescriptorAttr) -> bool

Returns true if all of the flags in other are contained within self.

fn insert(&mut self, other: DescriptorAttr)

Inserts the specified flags in-place.

fn remove(&mut self, other: DescriptorAttr)

Removes the specified flags in-place.

fn toggle(&mut self, other: DescriptorAttr)

Toggles the specified flags in-place.

fn set(&mut self, other: DescriptorAttr, value: bool)

Inserts or removes the specified flags depending on the passed value.

impl BitOr<DescriptorAttr> for DescriptorAttr

fn bitor(self, other: DescriptorAttr) -> Self

Returns the union of the two sets of flags.

type Output = DescriptorAttr

The resulting type after applying the | operator.

impl BitOrAssign<DescriptorAttr> for DescriptorAttr

fn bitor_assign(&mut self, other: Self)

Adds the set of flags.

impl BitXor<DescriptorAttr> for DescriptorAttr

fn bitxor(self, other: Self) -> Self

Returns the left flags, but with all the right flags toggled.

type Output = DescriptorAttr

The resulting type after applying the ^ operator.

impl BitXorAssign<DescriptorAttr> for DescriptorAttr

fn bitxor_assign(&mut self, other: Self)

Toggles the set of flags.

impl Debug for DescriptorAttr

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

Formats the value using the given formatter.

impl Extend<DescriptorAttr> for DescriptorAttr

fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl From<DescriptorAttr> for MappingFlags

fn from(attr: DescriptorAttr) -> Self

Converts to this type from the input type.

impl From<MappingFlags> for DescriptorAttr

fn from(flags: MappingFlags) -> Self

Converts to this type from the input type.

impl FromIterator<DescriptorAttr> for DescriptorAttr

fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self

Creates a value from an iterator.

impl IntoIterator for DescriptorAttr

type Item = DescriptorAttr

The type of the elements being iterated over.

type IntoIter = Iter

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl LowerHex for DescriptorAttr

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

Formats the value using the given formatter.

impl Not for DescriptorAttr

fn not(self) -> Self

Returns the complement of this set of flags.

type Output = DescriptorAttr

The resulting type after applying the ! operator.

impl Octal for DescriptorAttr

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

Formats the value using the given formatter.

impl PublicFlags for DescriptorAttr

type Internal = InternalBitFlags

The type of the internal field on the generated flags type.

impl Sub<DescriptorAttr> for DescriptorAttr

fn sub(self, other: Self) -> Self

Returns the set difference of the two sets of flags.

type Output = DescriptorAttr

The resulting type after applying the - operator.

impl SubAssign<DescriptorAttr> for DescriptorAttr

fn sub_assign(&mut self, other: Self)

Disables all flags enabled in the set.

impl UpperHex for DescriptorAttr

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

Formats the value using the given formatter.