Trait Hal 

pub trait Hal {
    // Required methods
    fn dma_alloc(pages: usize) -> usize;
    fn dma_dealloc(paddr: usize, pages: usize) -> i32;
    fn phys_to_virt(paddr: usize) -> usize;
    fn virt_to_phys(vaddr: usize) -> usize;
}

The interface which a particular hardware implementation must implement.

Required Methods

fn dma_alloc(pages: usize) -> usize

Allocates the given number of contiguous physical pages of DMA memory for virtio use.

fn dma_dealloc(paddr: usize, pages: usize) -> i32

Deallocates the given contiguous physical DMA memory pages.

fn phys_to_virt(paddr: usize) -> usize

Converts a physical address used for virtio to a virtual address which the program can access.

fn virt_to_phys(vaddr: usize) -> usize

Converts a virtual address which the program can access to the corresponding physical address to use for virtio.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors