Struct kernel::memory_management::physical_page_allocator::PhysicalPageAllocator

struct PhysicalPageAllocator {
    low_mem_free_list_head: Option<NonNull<FreePage>>,
    high_mem_start: usize,
    start: usize,
    end: usize,
    free_count: usize,
    used_count: usize,
}

Fields

low_mem_free_list_head: Option<NonNull<FreePage>>

high_mem_start: usize

start: usize

end: usize

free_count: usize

used_count: usize

Implementations

impl PhysicalPageAllocator

fn new(multiboot_info: &MultiBoot2Info) -> Self

fn init_range(&mut self, start: *mut u8, end: *mut u8)

unsafe fn alloc(&mut self) -> *mut u8

SAFETY: this must be called after init

Allocates a 4K page of memory

unsafe fn free(&mut self, page: *mut u8) -> Option<()>

SAFETY: this must be called after init this must never be called with same page twice, the allocator doesn’t check itself

fails if:

• page is null
• page is not in the range of the allocator
• page is not aligned to 4K with None, otherwise, Some(())

Trait Implementations

impl Send for PhysicalPageAllocator