commit 1061a11597ad7e9e85e0833e3feef2d7fa268d7b
Author: pjht <pterpstra@pterpstra.com>
Date:   Sun Jun 9 18:31:16 2024 -0500

    Initial commit

diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..bec4b7a
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,5 @@
+[build]
+target = "x86_64-unknown-mikros"
+
+[install]
+root = "../os_build/sysroot"
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..44433a7
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,279 @@
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+# It is not intended for manual editing.
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..f83083c
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "initrd_driver"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+dev_driver_rpc = { version = "0.1.0", path = "../dev_driver_rpc" }
+devfs_rpc = { version = "0.1.0", path = "../devfs/devfs_rpc" }
+file_rpc = { version = "0.1.0", path = "../file_rpc" }
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..0d0b7c7
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,52 @@
+use std::os::mikros::{ipc, syscalls::{self, get_initrd}};
+
+struct Serv {
+    initrd: &'static [u8]
+}
+
+impl dev_driver_rpc::Server for Serv {
+    fn open(&self, _path: &std::path::Path) -> Result<u64, ()> {
+        Ok(0)
+    }
+}
+
+impl file_rpc::Server for Serv {
+    fn read(&self, _fd: u64, pos: u64, len: usize) -> Result<Vec<u8>, ()> {
+        if pos as usize >= self.initrd.len() {
+            return Err(())
+        }
+        let avail_bytes = self.initrd.len() - pos as usize;
+        let read_len = usize::min(len, avail_bytes);
+        Ok(self.initrd[(pos as usize)..((pos as usize)+read_len)].to_vec())
+    }
+
+    fn write(&self, _fd: u64, _pos: u64, data: &[u8]) -> Result<(), ()> {
+        print!("{}", std::str::from_utf8(data).map_err(|_| ())?);
+        Ok(())
+    }
+
+    fn close(&self, _fd: u64) {
+    }
+
+    fn size(&self, _fd: u64) -> Option<u64> {
+        Some(self.initrd.len() as u64)
+    }
+}
+
+fn main() {
+    let initrd = get_initrd();
+    dev_driver_rpc::register_server(Box::new(Serv {initrd}));
+    file_rpc::register_server(Box::new(Serv {initrd}));
+    let devfs_pid;
+    loop {
+        if let Some(pid) = syscalls::try_get_registered(1) {
+            devfs_pid = pid;
+            break;
+        }
+    }
+    devfs_rpc::Client::new(devfs_pid).register_dev("initrd").unwrap();
+    loop {
+        ipc::process_messages()
+    }
+}
+