84 lines
2 KiB
Rust
84 lines
2 KiB
Rust
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use core::{future::Future, task::Poll};
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use hbvm::{
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mem::{softpaging::icache::ICache, Address},
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Vm, VmRunError, VmRunOk,
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};
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use {
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alloc::boxed::Box,
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hbvm::mem::softpaging::{HandlePageFault, SoftPagedMem},
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};
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const TIMER_QUOTIENT: usize = 100;
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pub struct ExecThread<'p> {
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vm: Vm<SoftPagedMem<'p, PageFaultHandler, true>, TIMER_QUOTIENT>,
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}
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unsafe impl<'p> Send for ExecThread<'p> {}
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impl<'p> ExecThread<'p> {
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pub unsafe fn new(program: &'p [u8], entrypoint: Address) -> Self {
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ExecThread {
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vm: unsafe {
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Vm::new(
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SoftPagedMem {
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root_pt: Box::into_raw(Box::default()),
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pf_handler: PageFaultHandler,
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program,
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icache: ICache::default(),
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},
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entrypoint,
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)
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},
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}
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}
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}
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impl<'p> Future for ExecThread<'p> {
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type Output = Result<(), VmRunError>;
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fn poll(
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mut self: core::pin::Pin<&mut Self>,
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cx: &mut core::task::Context<'_>,
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) -> Poll<Self::Output> {
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match self.vm.run() {
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Err(err) => return Poll::Ready(Err(err)),
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Ok(VmRunOk::End) => return Poll::Ready(Ok(())),
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Ok(VmRunOk::Ecall) => {
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log::info!("Ecall");
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log::info!("{:?}", self.vm.registers);
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}
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Ok(VmRunOk::Timer) => (),
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}
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cx.waker().wake_by_ref();
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Poll::Pending
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}
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}
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struct PageFaultHandler;
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impl HandlePageFault for PageFaultHandler {
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fn page_fault(
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&mut self,
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reason: hbvm::mem::MemoryAccessReason,
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pagetable: &mut hbvm::mem::softpaging::paging::PageTable,
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vaddr: hbvm::mem::Address,
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size: hbvm::mem::softpaging::PageSize,
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dataptr: *mut u8,
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) -> bool
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where
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Self: Sized,
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{
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log::error!(
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"REASON: {reason} \
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vaddr: {vaddr} \
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size: {size:?} \
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Dataptr {dataptr:p}",
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);
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false
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}
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}
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