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"registry+https://github.com/rust-lang/crates.io-index" +checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0" diff --git a/devfs_rpc/Cargo.toml b/devfs_rpc/Cargo.toml new file mode 100644 index 0000000..395849a --- /dev/null +++ b/devfs_rpc/Cargo.toml @@ -0,0 +1,9 @@ +[package] +name = "devfs_rpc" +version = "0.1.0" +edition = "2021" + +[dependencies] +parking_lot = "0.12.3" +rmp-serde = "1.3.0" +serde = { version = "1.0.203", features = ["derive"] } diff --git a/devfs_rpc/src/lib.rs b/devfs_rpc/src/lib.rs new file mode 100644 index 0000000..863e01a --- /dev/null +++ b/devfs_rpc/src/lib.rs @@ -0,0 +1,51 @@ +#![allow(clippy::result_unit_err)] + +use std::{ + os::mikros::ipc::rpc::{self, IncomingCall}, path::Path, +}; + +use parking_lot::RwLock; + +static SERVER: RwLock>> = RwLock::new(None); + +const PROTO: u16 = 4; + +pub trait Server: Send + Sync { + fn register_dev(&self, from: u64, name: &str) -> Result<(), ()>; +} + +#[derive(Copy, Clone)] +pub struct Client(u64); + +impl Client { + pub fn new(pid: u64) -> Self { + Self(pid) + } + + pub fn register_dev(self, name: &str) -> Result<(), ()> { + rmp_serde::from_slice( + &rpc::send_call(self.0, PROTO, 0, &rmp_serde::to_vec(name).unwrap()).get_return(), + ) + .unwrap() + } +} + +pub fn register_server(server: Box) { + *SERVER.write() = Some(server); + rpc::register_callback(PROTO, callback); +} + +pub fn unregister_server() { + rpc::unregister_callback(PROTO); + *SERVER.write() = None; +} + +fn callback(call: IncomingCall) { + let server_lock = SERVER.read(); + let server = server_lock.as_ref().unwrap(); + if call.func == 0 { + let kind = rmp_serde::from_slice(&call.args).unwrap(); + let ret = rmp_serde::to_vec(&server.register_dev(call.from, kind)).unwrap(); + call.send_return(&ret); + } +} diff --git a/rust-toolchain.toml b/rust-toolchain.toml new file mode 100644 index 0000000..a5535e3 --- /dev/null +++ b/rust-toolchain.toml @@ -0,0 +1,2 @@ +[toolchain] +channel = "dev-x86_64-unknown-mikros" diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..faa9d1d --- /dev/null +++ b/src/main.rs @@ -0,0 +1,48 @@ +use std::{collections::HashMap, os::mikros::{ipc, syscalls}, sync::Arc}; + +use parking_lot::RwLock; + +#[derive(Debug, Clone)] +struct Serv { + devices: Arc>>, +} + +impl fs_rpc::Server for Serv { + fn mount(&self, _dev: &std::path::Path, _path: &std::path::Path) -> Result { + Ok(0) + } + + fn open(&self, path: &std::path::Path, _mount_id: u64) -> Result<(Option, u64), ()> { + let name = path.to_str().ok_or(())?; + let device_pid = *self.devices.read().get(name).ok_or(())?; + let fd = dev_driver_rpc::Client::new(device_pid).open(path)?; + Ok((Some(device_pid), fd)) + } +} + +impl devfs_rpc::Server for Serv { + fn register_dev(&self, from: u64, name: &str) -> Result<(), ()> { + self.devices.write().insert(name.to_owned(), from); + Ok(()) + } +} + +fn main() { + let serv = Serv { + devices: Arc::new(RwLock::new(HashMap::new())) + }; + fs_rpc::register_server(Box::new(serv.clone())); + devfs_rpc::register_server(Box::new(serv)); + let vfs_pid; + loop { + if let Some(pid) = syscalls::try_get_registered(0) { + vfs_pid = pid; + break; + } + } + vfs_rpc::Client::new(vfs_pid).register_fs("devfs").unwrap(); + syscalls::register(1); + loop { + ipc::process_messages() + } +}