diff --git a/Cargo.lock b/Cargo.lock index 13f2fd3..ad23089 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -12,21 +12,6 @@ dependencies = [ "versioning", ] -[[package]] -name = "addr2line" -version = "0.20.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f4fa78e18c64fce05e902adecd7a5eed15a5e0a3439f7b0e169f0252214865e3" -dependencies = [ - "gimli", -] - -[[package]] -name = "adler" -version = "1.0.2" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe" - [[package]] name = "ahash" version = "0.7.6" @@ -55,27 +40,6 @@ version = "0.2.16" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "0942ffc6dcaadf03badf6e6a2d0228460359d5e34b57ccdc720b7382dfbd5ec5" -[[package]] -name = "android-tzdata" -version = "0.1.1" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0" - 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[[package]] name = "bit" version = "0.1.1" @@ -127,54 +70,18 @@ version = "1.3.2" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a" -[[package]] -name = "bumpalo" -version = "3.13.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "a3e2c3daef883ecc1b5d58c15adae93470a91d425f3532ba1695849656af3fc1" - [[package]] name = "byteorder" version = "1.4.3" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610" -[[package]] -name = "bytes" -version = "1.4.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "89b2fd2a0dcf38d7971e2194b6b6eebab45ae01067456a7fd93d5547a61b70be" - -[[package]] -name = "cc" -version = "1.0.83" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f1174fb0b6ec23863f8b971027804a42614e347eafb0a95bf0b12cdae21fc4d0" -dependencies = [ - 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-[[package]] -name = "windows_x86_64_msvc" -version = "0.48.5" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538" - -[[package]] -name = "winreg" -version = "0.50.0" -source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "524e57b2c537c0f9b1e69f1965311ec12182b4122e45035b1508cd24d2adadb1" -dependencies = [ - "cfg-if", - "windows-sys", -] - [[package]] name = "x2apic" version = "0.4.2" diff --git a/Cargo.toml b/Cargo.toml index 9d2b277..47c7f15 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -1,3 +1,3 @@ [workspace] resolver = "2" -members = ["kernel", "repbuild"] +members = ["kernel"] diff --git a/kernel/Cargo.toml b/kernel/Cargo.toml index 2588850..2765f2d 100644 --- a/kernel/Cargo.toml +++ b/kernel/Cargo.toml @@ -15,6 +15,7 @@ xml.git = "https://git.ablecorp.us/ableos/ableos_userland" versioning.git = "https://git.ablecorp.us/ableos/ableos_userland" able_graphics_library.git = "https://git.ablecorp.us/ableos/ableos_userland" hashbrown = "*" +kiam = "0.1.1" [dependencies.limine] version = "0.1" diff --git a/kernel/src/holeybytes.rs b/kernel/src/holeybytes.rs new file mode 100644 index 0000000..225ce3d --- /dev/null +++ b/kernel/src/holeybytes.rs @@ -0,0 +1,83 @@ +use core::{future::Future, task::Poll}; + +use hbvm::{ + mem::{softpaging::icache::ICache, Address}, + Vm, VmRunError, VmRunOk, +}; + +use { + alloc::boxed::Box, + hbvm::mem::softpaging::{HandlePageFault, SoftPagedMem}, +}; + +const TIMER_QUOTIENT: usize = 100; + +pub struct ExecThread<'p> { + vm: Vm, TIMER_QUOTIENT>, +} + +unsafe impl<'p> Send for ExecThread<'p> {} + +impl<'p> ExecThread<'p> { + pub unsafe fn new(program: &'p [u8], entrypoint: Address) -> Self { + ExecThread { + vm: unsafe { + Vm::new( + SoftPagedMem { + root_pt: Box::into_raw(Box::default()), + pf_handler: PageFaultHandler, + program, + icache: ICache::default(), + }, + entrypoint, + ) + }, + } + } +} + +impl<'p> Future for ExecThread<'p> { + type Output = Result<(), VmRunError>; + + fn poll( + mut self: core::pin::Pin<&mut Self>, + cx: &mut core::task::Context<'_>, + ) -> Poll { + match self.vm.run() { + Err(err) => return Poll::Ready(Err(err)), + Ok(VmRunOk::End) => return Poll::Ready(Ok(())), + Ok(VmRunOk::Ecall) => { + log::info!("Ecall"); + log::info!("{:?}", self.vm.registers); + } + Ok(VmRunOk::Timer) => (), + } + + cx.waker().wake_by_ref(); + Poll::Pending + } +} + +struct PageFaultHandler; +impl HandlePageFault for PageFaultHandler { + fn page_fault( + &mut self, + reason: hbvm::mem::MemoryAccessReason, + pagetable: &mut hbvm::mem::softpaging::paging::PageTable, + vaddr: hbvm::mem::Address, + size: hbvm::mem::softpaging::PageSize, + dataptr: *mut u8, + ) -> bool + where + Self: Sized, + { + log::error!( + "REASON: {reason} \ + vaddr: {vaddr} \ + size: {size:?} \ + Dataptr {dataptr:p}", + ); + + false + } +} diff --git a/kernel/src/host.rs b/kernel/src/host.rs deleted file mode 100644 index 5cb0c29..0000000 --- a/kernel/src/host.rs +++ /dev/null @@ -1,90 +0,0 @@ -//! the system interface - -// use { -// crate::ipc::message::Message, -// alloc::vec::Vec, -// crossbeam_queue::{ArrayQueue, SegQueue}, -// // hbvm::engine::Engine, -// log::trace, -// HostError::MemoryError, -// }; -/// Host errors -pub enum HostError { - /// A host memory error - MemoryError, -} - -// / Check f0 register for the handle -// / check f1 for the message ptr -// / check f2 for the message length -// pub fn ipc_send(engine: &mut Engine) -> Result<(), HostError> { -// let _handle = engine.registers.f0; -// let message_start = engine.registers.f1; -// let message_length = engine.registers.f2; - -// let mut ipc_msg: Vec = alloc::vec![]; - -// for x in message_start..message_start + message_length { -// let byte = engine.read_mem_addr_8(x); -// match byte { -// Ok(byte) => ipc_msg.push(byte), -// Err(_) => return Err(MemoryError), -// } -// } -// log::trace!("Message bytes {:?}", ipc_msg); -// Ok(()) -// } - -// // pub fn ipc_recv(_engine: &mut Engine) {} - -// /// Check f0 for the buffer type -// /// 0 means an unbound buffer -// /// 1 means a bound buffer -// /// Check f1 if the buffer is bound -// /// -// /// f2 Return a handle to the sender -// /// f3 returns a handle the the reciever -// pub fn ipc_mkbuf(engine: &mut Engine) { -// match engine.registers.f0 as usize { -// 0 => { -// trace!("Making a new ipc unbound buffer"); -// let _buf: SegQueue = SegQueue::new(); -// } -// 1 => { -// let buf_len = engine.registers.f1 as usize; -// trace!("Making a new ipc buffer with capacity {}", buf_len); -// let _buf: ArrayQueue = ArrayQueue::new(buf_len); -// } -// _ => {} -// } -// } - -// // pub fn rpc_discover(_engine: &mut Engine) {} -// // pub fn rpc_register(_engine: &mut Engine) {} -// // pub fn rpc_call(_engine: &mut Engine) {} - -use hbvm::mem::softpaging::HandlePageFault; -/// AbleOS HBVM traphandler -pub struct TrapHandler; -impl HandlePageFault for TrapHandler { - fn page_fault( - &mut self, - reason: hbvm::mem::MemoryAccessReason, - pagetable: &mut hbvm::mem::softpaging::paging::PageTable, - vaddr: hbvm::mem::Address, - size: hbvm::mem::softpaging::PageSize, - dataptr: *mut u8, - ) -> bool - where - Self: Sized, - { - log::error!( - "REASON: {reason} \ - vaddr: {vaddr} \ - size: {size:?} \ - Dataptr {dataptr:p}", - ); - - false - } -} diff --git a/kernel/src/kmain.rs b/kernel/src/kmain.rs index 029b6f6..be037f1 100644 --- a/kernel/src/kmain.rs +++ b/kernel/src/kmain.rs @@ -1,11 +1,14 @@ //! AbleOS Kernel Entrypoint +use hbvm::mem::Address; + +use crate::holeybytes::ExecThread; + // use crate::arch::sloop; use { crate::{ bootmodules::{build_cmd, BootModules}, device_tree::DeviceTree, - scheduler::Scheduler, }, alloc::format, log::{debug, info, trace}, @@ -16,7 +19,7 @@ use { pub fn kmain(cmdline: &str, boot_modules: BootModules) -> ! { debug!("Entered kmain"); - let kcmd = build_cmd("Kernel Command Line", &cmdline); + let kcmd = build_cmd("Kernel Command Line", cmdline); trace!("Cmdline: {kcmd:?}"); for (i, bm) in boot_modules.iter().enumerate() { @@ -39,13 +42,20 @@ pub fn kmain(cmdline: &str, boot_modules: BootModules) -> ! { // capabilities::example(); - let mut sched = Scheduler::new(); + let mut executor = crate::task::Executor::default(); + unsafe { + for module in boot_modules.into_iter().take(2) { + executor.spawn(async move { + if let Err(e) = ExecThread::new(&module.bytes, Address::new(4)).await { + log::error!("{e:?}"); + } + }); + } - sched.new_process(boot_modules[0].bytes.clone()); - sched.new_process(boot_modules[1].bytes.clone()); + executor.run(); + }; - sched.run(); - // spin_loop(); + crate::arch::spin_loop() } pub static DEVICE_TREE: Lazy> = Lazy::new(|| { diff --git a/kernel/src/lib.rs b/kernel/src/lib.rs index 882fe60..7b04017 100644 --- a/kernel/src/lib.rs +++ b/kernel/src/lib.rs @@ -12,7 +12,6 @@ ptr_sub_ptr, custom_test_frameworks )] -#![deny(clippy::pedantic, missing_docs, warnings)] #![allow(dead_code)] #![test_runner(crate::test_runner)] @@ -21,16 +20,16 @@ extern crate alloc; mod allocator; mod arch; mod bootmodules; -pub mod capabilities; -pub mod device_tree; -pub mod handle; -pub mod host; -pub mod ipc; +mod capabilities; +mod device_tree; +mod handle; +mod holeybytes; +mod ipc; mod kmain; mod logger; mod memory; -mod scheduler; -pub mod utils; +mod task; +mod utils; use versioning::Version; diff --git a/kernel/src/scheduler.rs b/kernel/src/scheduler.rs deleted file mode 100644 index 899ea39..0000000 --- a/kernel/src/scheduler.rs +++ /dev/null @@ -1,76 +0,0 @@ -use { - alloc::{collections::VecDeque, rc::Rc, slice, vec::Vec}, - hbvm::validate::validate, -}; - -use {crate::host::TrapHandler, hbvm::Vm}; -const TIMER_QUOTIENT: usize = 100; - -pub struct Scheduler<'a> { - data: VecDeque>, -} - -// NOTE: This is a very simple schduler and it sucks and should be replaced with a better one -// Written By Yours Truly: Munir - -impl Scheduler<'_> { - pub fn new() -> Self { - Self { - data: VecDeque::new(), - } - } - pub fn new_process(&mut self, program: Vec) { - let prog = program.clone(); - let prog_arc = Rc::new(prog); - - let binding = Rc::try_unwrap(prog_arc).ok().unwrap(); - - #[allow(clippy::redundant_else)] - if let Err(e) = validate(&program.as_slice()) { - log::error!("Program validation error: {e:?}"); - } else { - log::info!("valid program"); - unsafe { - let slice = slice::from_raw_parts(binding.as_ptr(), binding.len()); - let mut vm = Vm::new_unchecked(&*slice, TrapHandler); - vm.memory.insert_test_page(); - self.data.push_front(vm); - } - } - } - - pub fn run(&mut self) -> ! { - loop { - // If there are no programs to run then sleep. - if self.data.is_empty() { - use crate::arch::spin_loop; - spin_loop(); - } - - let mut prog = self.data.pop_front().unwrap(); - let ret = prog.run(); - match ret { - Ok(oki) => match oki { - hbvm::VmRunOk::End => { - log::info!( - "Program ended. {} programs remaining.", - // Add one here because we pop a program - self.data.len() + 1 - ) - } - hbvm::VmRunOk::Timer => { - log::info!("Timer exhausted. Scheduled program"); - self.data.push_back(prog); - } - hbvm::VmRunOk::Ecall => { - // panic!(); - log::info!("{:?}", prog.registers); - self.data.push_back(prog); - } - }, - - Err(_) => {} - } - } - } -} diff --git a/kernel/src/task.rs b/kernel/src/task.rs new file mode 100644 index 0000000..ea39f84 --- /dev/null +++ b/kernel/src/task.rs @@ -0,0 +1,138 @@ +#![allow(unused)] + +use { + alloc::{boxed::Box, collections::BTreeMap, sync::Arc, task::Wake}, + core::{ + future::Future, + pin::Pin, + task::{Context, Poll, Waker}, + }, + crossbeam_queue::SegQueue, + kiam::when, + slab::Slab, + spin::RwLock, +}; + +static SPAWN_QUEUE: RwLock> = RwLock::new(None); +pub fn spawn(future: impl Future + Send + 'static) { + match &*SPAWN_QUEUE.read() { + Some(s) => s.push(Task::new(future)), + None => panic!("no task executor is running"), + } +} + +pub fn yield_now() -> impl Future { + struct YieldNow(bool); + impl Future for YieldNow { + type Output = (); + + fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll { + if self.0 { + Poll::Ready(()) + } else { + self.0 = true; + cx.waker().wake_by_ref(); + Poll::Pending + } + } + } + + YieldNow(false) +} + +#[derive(Default)] +pub struct Executor { + tasks: Slab, + queue: TaskQueue, + to_spawn: SpawnQueue, + wakers: BTreeMap, +} + +impl Executor { + pub fn spawn(&mut self, future: impl Future + Send + 'static) { + self.queue + .push(TaskId(self.tasks.insert(Task::new(future)))); + } + + pub fn run(&mut self) { + { + let mut global_spawner = SPAWN_QUEUE.write(); + if global_spawner.is_some() { + panic!("Task executor is already running"); + } + + *global_spawner = Some(Arc::clone(&self.to_spawn)); + } + + loop { + when! { + let Some(id) = self + .to_spawn + .pop() + .map(|t| TaskId(self.tasks.insert(t))) + .or_else(|| self.queue.pop()) + => { + let Some(task) = self.tasks.get_mut(id.0) else { + panic!("Attempted to get task from empty slot: {}", id.0); + }; + + let mut cx = Context::from_waker(self.wakers.entry(id).or_insert_with(|| { + Waker::from(Arc::new(TaskWaker { + id, + queue: Arc::clone(&self.queue), + })) + })); + + match task.poll(&mut cx) { + Poll::Ready(()) => { + self.tasks.remove(id.0); + self.wakers.remove(&id); + } + Poll::Pending => (), + } + }, + self.tasks.is_empty() => break, + _ => (), + } + } + + *SPAWN_QUEUE.write() = None; + } +} + +struct Task { + future: Pin + Send>>, +} + +impl Task { + pub fn new(future: impl Future + Send + 'static) -> Self { + Self { + future: Box::pin(future), + } + } + + fn poll(&mut self, cx: &mut Context) -> Poll<()> { + self.future.as_mut().poll(cx) + } +} + +#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)] +struct TaskId(usize); + +type TaskQueue = Arc>; +type SpawnQueue = Arc>; + +struct TaskWaker { + id: TaskId, + queue: TaskQueue, +} + +impl Wake for TaskWaker { + fn wake(self: Arc) { + self.wake_by_ref(); + } + + fn wake_by_ref(self: &Arc) { + self.queue.push(self.id); + } +} diff --git a/repbuild/holeybytes/ecall.hb b/repbuild/holeybytes/ecall.hb index 3ecd89a..6550b82 100644 Binary files a/repbuild/holeybytes/ecall.hb and b/repbuild/holeybytes/ecall.hb differ