kernel::mm::state

Struct Mm

#[repr(align(64))]pub struct Mm {
    hhdm_offset: AtomicU64,
    pmm: UncheckedCell<IrqMutex<Pmm>>,
    kernel_addr_space: UncheckedCell<IrqMutex<AddressSpace>>,
    next_kernel_stack: AtomicU64,
}

Expand description

Holds memory management state such as slab allocators and virtual memory areas

Fields§

§hhdm_offset: AtomicU64§pmm: UncheckedCell<IrqMutex<Pmm>>§kernel_addr_space: UncheckedCell<IrqMutex<AddressSpace>>§next_kernel_stack: AtomicU64

Implementations§

Source §

impl Mm

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pub const fn new() -> Self

Constructor; initializes all values zeroed or uninited

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pub fn init(&self)

Initialize Mm’s default values

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pub fn set_hhdm_offset(&self, offset: u64)

Sets the HHDM offset

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pub unsafe fn init_pmm(&self, pmm: Pmm)

Move the given Pmm into Mm::pmm

§Safety

The caller must guarantee the following:

That this method has never been called before and will never be called again
That at the time of calling this method, no references or pointers to this data exist
While this method is being called, no other CPU is working with the given data

Source

pub unsafe fn init_kernel_addr_space(&self, kernel_addr_space: AddressSpace)

Move the given AddressSpace into Mm::kernel_addr_space

§Safety

The caller must guarantee the following:

That this method has never been called before and will never be called again
That at the time of calling this method, no references or pointers to this data exist
While this method is being called, no other CPU is working with the given data

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pub fn hhdm_offset(&self) -> u64

Getter for the hhdm offset

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pub unsafe fn pmm(&self) -> &IrqMutex<Pmm>

Getter for Mm::pmm

§Safety

The caller must guarantee the following:

That this value’s init method has already been called before
That at this method’s entire execution time, no mutable references or pointers to this data exist or will exist

Source

pub unsafe fn kernel_addr_space(&self) -> &IrqMutex<AddressSpace>

Getter for Mm::kernel_address_space

§Safety

The caller must guarantee the following:

That this value’s init method has already been called before
That at this method’s entire execution time, no mutable references or pointers to this data exist or will exist

Source