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MemoryAttribute

patina::boot_services::allocation

Struct MemoryAttribute 

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pub struct MemoryAttribute(/* private fields */);
Expand description

Memory attributes as specified in the UEFI specification.

Used to describe the attributes of a memory region.

https://uefi.org/specs/UEFI/2.11/07_Services_Boot_Services.html#efi-boot-services-getmemorymap

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impl MemoryAttribute

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pub const UC: MemoryAttribute

Memory cacheability attribute: The memory region is not cacheable.

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pub const WC: MemoryAttribute

Memory cacheability attribute: The memory region is write combined.

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pub const WT: MemoryAttribute

Memory cacheability attribute: The memory region is cacheable with a “write through” policy. Writes that hit in the cache will also be written to main memory.

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pub const WB: MemoryAttribute

Memory cacheability attribute: The memory region is cacheable with a “write back” policy. Reads and writes that hit in the cache do not propagate to main memory. Dirty data is written back to main memory when a new cache line is allocated.

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pub const UCE: MemoryAttribute

Memory cacheability attribute: The memory region is cacheable, exported, and supports the “fetch and add” semaphore mechanism.

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pub const WP: MemoryAttribute

Physical memory protection attribute: The memory region is write-protected by system hardware. This is typically used as a cacheability attribute today. The memory region is cacheable with a “write protected” policy. Reads come from cache lines when possible, and read misses cause cache fills. Writes are propagated to the system bus and cause corresponding cache lines on all processors on the bus to be invalidated.

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pub const RP: MemoryAttribute

Physical memory protection attribute: The memory region is read-protected by system hardware.

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pub const XP: MemoryAttribute

Physical memory protection attribute: The memory region supports is protected by system hardware from executing code.

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pub const NV: MemoryAttribute

Runtime memory attribute: The memory region refers to persistent memory

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pub const MORE_RELIABLE: MemoryAttribute

The memory region provides higher reliability relative to other memory in the system. If all memory has the same reliability, then this bit is not used.

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pub const RO: MemoryAttribute

Physical memory protection attribute: The memory region supports making this memory range read-only by system hardware.

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pub const SP: MemoryAttribute

Specific-purpose memory (SPM). The memory is earmarked for specific purposes such as for specific device drivers or applications. The SPM attribute serves as a hint to the OS to avoid allocating this memory for core OS data or code that can not be relocated. Prolonged use of this memory for purposes other than the intended purpose may result in suboptimal platform performance.

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pub const CPU_CRYPTO: MemoryAttribute

The memory region is protected with the CPU’s memory cryptographic capabilities. If this flag is clear, the memory region is not capable of being protected with the CPU’s memory cryptographic capabilities or the CPU does not support CPU memory cryptographic capabilities.

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pub const RUNTIME: MemoryAttribute

Runtime memory attribute: The memory region needs to be given a virtual mapping by the operating system when SetVirtualAddressMap() is called.

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pub const ISA_VALID: MemoryAttribute

The memory region is described with additional ISA-specific memory attributes as specified in EFI_MEMORY_ISA_MASK.

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pub const ISA_MASK: MemoryAttribute

Bits reserved for describing optional ISA-specific cacheability attributes that are not covered by the standard UEFI Memory Attributes cacheability bits (EFI_MEMORY_UC, EFI_MEMORY_WC, EFI_MEMORY_WT, EFI_MEMORY_WB and EFI_MEMORY_UCE). See Calling Conventions for further ISA-specific enumeration of these bits.

Trait Implementations§

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impl BitOr for MemoryAttribute

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type Output = MemoryAttribute

The resulting type after applying the | operator.
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fn bitor(self, rhs: Self) -> Self::Output

Performs the | operation. Read more
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impl BitOrAssign for MemoryAttribute

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fn bitor_assign(&mut self, rhs: Self)

Performs the |= operation. Read more
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impl Clone for MemoryAttribute

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fn clone(&self) -> MemoryAttribute

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 MemoryAttribute

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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 From<MemoryAttribute> for u64

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fn from(val: MemoryAttribute) -> Self

Converts to this type from the input type.
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impl PartialEq for MemoryAttribute

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fn eq(&self, other: &MemoryAttribute) -> 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 MemoryAttribute

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impl Eq for MemoryAttribute

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impl StructuralPartialEq for MemoryAttribute

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

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fn type_id(&self) -> TypeId

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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)
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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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where Self: LowerHex,

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where Self: Octal,

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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

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fn from(t: T) -> T

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fn into(self) -> U

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where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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fn tap_mut(self, func: impl FnOnce(&mut Self)) -> Self

Mutable access to a value. Read more
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fn tap_borrow<B>(self, func: impl FnOnce(&B)) -> Self
where Self: Borrow<B>, B: ?Sized,

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fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
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Calls .tap_ref() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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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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Uses borrowed data to replace owned data, usually by cloning. Read more
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type Error = Infallible

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Performs the conversion.
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Performs the conversion.