Trait sunrise_kernel::frame_allocator::FrameAllocatorTrait

pub trait FrameAllocatorTrait: FrameAllocatorTraitPrivate {
    fn allocate_region(length: usize) -> Result<PhysicalMemRegion, KernelError>;
    fn allocate_frames_fragmented(
        length: usize
    ) -> Result<Vec<PhysicalMemRegion>, KernelError>;

    fn allocate_frame() -> Result<PhysicalMemRegion, KernelError> { ... }
}

An arch-specific FrameAllocator must expose the following functions

Required methods

fn allocate_region(length: usize) -> Result<PhysicalMemRegion, KernelError>

Allocates a single PhysicalMemRegion. Frames are physically consecutive.

fn allocate_frames_fragmented(
    length: usize
) -> Result<Vec<PhysicalMemRegion>, KernelError>

Allocates physical frames, possibly fragmented across several physical regions.

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Provided methods

fn allocate_frame() -> Result<PhysicalMemRegion, KernelError>

Allocates a single physical frame.

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Implementors

impl FrameAllocatorTrait for FrameAllocator

fn allocate_region(length: usize) -> Result<PhysicalMemRegion, KernelError>

Allocates a single PhysicalMemRegion. Frames are physically consecutive.

Errors

• InvalidSize
  • length is not page size aligned.
  • length is 0.

Panics

• Panics if FRAME_ALLOCATOR was not initialized.

fn allocate_frames_fragmented(
    length: usize
) -> Result<Vec<PhysicalMemRegion>, KernelError>

Allocates physical frames, possibly fragmented across several physical regions.

Errors

• InvalidSize:
  • length is not page size aligned.
  • length is 0.

Panics

• Panics if FRAME_ALLOCATOR was not initialized.

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