From 585fc3f72adc94b92ed1c0566f8cefe922f634ef Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marcin=20Miko=C5=82ajczyk?= <marcinmikolajcz@gmail.com>
Date: Sat, 3 Feb 2024 23:27:26 +0000
Subject: [PATCH] Implement /dev/sbl_srv file

---
 src/kernel/src/fs/dev/cdev.rs |  1 +
 src/kernel/src/fs/mod.rs      |  2 +-
 src/kernel/src/main.rs        |  3 +++
 src/kernel/src/sbl/mod.rs     | 45 +++++++++++++++++++++++++++++++++++
 4 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 src/kernel/src/sbl/mod.rs

diff --git a/src/kernel/src/fs/dev/cdev.rs b/src/kernel/src/fs/dev/cdev.rs
index f9bad1f8c..2353f2a3f 100644
--- a/src/kernel/src/fs/dev/cdev.rs
+++ b/src/kernel/src/fs/dev/cdev.rs
@@ -195,6 +195,7 @@ bitflags! {
     #[derive(Debug, Clone, Copy)]
     pub struct DriverFlags: u32 {
         const D_NEEDMINOR = 0x00800000;
+        const D_INIT = 0x80000000;
     }
 }
 
diff --git a/src/kernel/src/fs/mod.rs b/src/kernel/src/fs/mod.rs
index a64233928..5c502a0f0 100644
--- a/src/kernel/src/fs/mod.rs
+++ b/src/kernel/src/fs/mod.rs
@@ -25,7 +25,7 @@ pub use self::perm::*;
 pub use self::stat::*;
 pub use self::vnode::*;
 
-mod dev;
+pub mod dev;
 mod dirent;
 mod file;
 mod host;
diff --git a/src/kernel/src/main.rs b/src/kernel/src/main.rs
index 15e50c8da..1f92d2321 100644
--- a/src/kernel/src/main.rs
+++ b/src/kernel/src/main.rs
@@ -13,6 +13,7 @@ use crate::osem::OsemManager;
 use crate::process::{VProc, VProcInitError, VThread};
 use crate::regmgr::RegMgr;
 use crate::rtld::{LoadFlags, ModuleFlags, RuntimeLinker};
+use crate::sbl::SblManager;
 use crate::shm::SharedMemoryManager;
 use crate::syscalls::Syscalls;
 use crate::sysctl::Sysctl;
@@ -52,6 +53,7 @@ mod osem;
 mod process;
 mod regmgr;
 mod rtld;
+mod sbl;
 mod shm;
 mod signal;
 mod syscalls;
@@ -276,6 +278,7 @@ fn run<E: crate::ee::ExecutionEngine>(
     TimeManager::new(&mut syscalls);
     KernelQueueManager::new(&mut syscalls);
     NetManager::new(&mut syscalls);
+    SblManager::new();
 
     // TODO: Get correct budget name from the PS4.
     let budget_id = budget.create(Budget::new("big app", ProcType::BigApp));
diff --git a/src/kernel/src/sbl/mod.rs b/src/kernel/src/sbl/mod.rs
new file mode 100644
index 000000000..0a9f56d4e
--- /dev/null
+++ b/src/kernel/src/sbl/mod.rs
@@ -0,0 +1,45 @@
+use std::sync::Arc;
+
+use crate::{
+    errno::Errno,
+    fs::{make_dev, Cdev, CdevSw, DriverFlags, MakeDev, Mode, OpenFlags},
+    process::VThread,
+    ucred::{Gid, Uid},
+};
+
+#[derive(Debug)]
+pub struct SblManager {}
+
+impl SblManager {
+    pub fn new() -> Arc<Self> {
+        let sbl = Arc::new(Self {});
+
+        let sbl_srv_cdevsw = Arc::new(CdevSw::new(
+            DriverFlags::D_INIT,
+            Some(Self::sbl_srv_open),
+            None,
+        ));
+
+        let _ = make_dev(
+            &sbl_srv_cdevsw,
+            0,
+            "sbl_srv",
+            Uid::ROOT,
+            Gid::ROOT,
+            Mode::new(0o600).unwrap(),
+            None,
+            MakeDev::MAKEDEV_ETERNAL,
+        );
+
+        sbl
+    }
+
+    fn sbl_srv_open(
+        _: &Arc<Cdev>,
+        _: OpenFlags,
+        _: i32,
+        _: Option<&VThread>,
+    ) -> Result<(), Box<dyn Errno>> {
+        todo!()
+    }
+}