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28 lines
814 B
28 lines
814 B
pub use crate::arch::paging::PageTableImpl;
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use crate::memory::{alloc_frame, dealloc_frame, phys_to_virt, virt_to_phys};
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use isomorphic_drivers::provider;
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use rcore_memory::PAGE_SIZE;
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pub struct Provider;
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impl provider::Provider for Provider {
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const PAGE_SIZE: usize = PAGE_SIZE;
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fn alloc_dma(size: usize) -> (usize, usize) {
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// TODO: allocate continuous pages
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let mut paddr = alloc_frame().unwrap();
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for i in 1..(size / PAGE_SIZE) {
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let paddr_new = alloc_frame().unwrap();
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assert_eq!(paddr - PAGE_SIZE, paddr_new);
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paddr = paddr_new;
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}
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let vaddr = phys_to_virt(paddr);
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(vaddr, paddr)
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}
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fn dealloc_dma(vaddr: usize, size: usize) {
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let paddr = virt_to_phys(vaddr);
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dealloc_frame(paddr);
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}
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}
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