From d29845968666e15f4b1a2c9dbe4c0fb2561e8baf Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jackpot51@gmail.com>
Date: Fri, 18 Nov 2022 14:18:06 -0700
Subject: [PATCH] Add sys:irq

---
 src/scheme/irq.rs     |  2 +-
 src/scheme/sys/irq.rs | 20 ++++++++++++++++++++
 src/scheme/sys/mod.rs |  6 ++++--
 3 files changed, 25 insertions(+), 3 deletions(-)
 create mode 100644 src/scheme/sys/irq.rs

diff --git a/src/scheme/irq.rs b/src/scheme/irq.rs
index 2f46d29..abd7b59 100644
--- a/src/scheme/irq.rs
+++ b/src/scheme/irq.rs
@@ -20,7 +20,7 @@ use crate::syscall::scheme::{calc_seek_offset_usize, Scheme};
 pub static IRQ_SCHEME_ID: AtomicSchemeId = AtomicSchemeId::default();
 
 /// IRQ queues
-static COUNTS: Mutex<[usize; 224]> = Mutex::new([0; 224]);
+pub(super) static COUNTS: Mutex<[usize; 224]> = Mutex::new([0; 224]);
 static HANDLES: RwLock<Option<BTreeMap<usize, Handle>>> = RwLock::new(None);
 
 /// These are IRQs 0..=15 (corresponding to interrupt vectors 32..=47). They are opened without the
diff --git a/src/scheme/sys/irq.rs b/src/scheme/sys/irq.rs
new file mode 100644
index 0000000..7e4b69c
--- /dev/null
+++ b/src/scheme/sys/irq.rs
@@ -0,0 +1,20 @@
+use alloc::{
+    string::String,
+    vec::Vec,
+};
+use core::fmt::Write;
+
+use crate::syscall::error::Result;
+
+pub fn resource() -> Result<Vec<u8>> {
+    let mut string = String::new();
+
+    {
+        let counts = crate::scheme::irq::COUNTS.lock();
+        for (i, count) in counts.iter().enumerate() {
+            let _ = writeln!(string, "{}: {}", i, count);
+        }
+    }
+
+    Ok(string.into_bytes())
+}
diff --git a/src/scheme/sys/mod.rs b/src/scheme/sys/mod.rs
index 70b5399..fadbd5b 100644
--- a/src/scheme/sys/mod.rs
+++ b/src/scheme/sys/mod.rs
@@ -9,13 +9,14 @@ use crate::syscall::data::Stat;
 use crate::syscall::error::{Error, EBADF, ENOENT, Result};
 use crate::syscall::flag::{MODE_DIR, MODE_FILE};
 use crate::syscall::scheme::{calc_seek_offset_usize, Scheme};
-use crate::arch::interrupt::irq;
+use crate::arch::interrupt;
 
 mod block;
 mod context;
 mod cpu;
 mod exe;
 mod iostat;
+mod irq;
 mod log;
 mod scheme;
 mod scheme_num;
@@ -47,6 +48,7 @@ impl SysScheme {
         files.insert("cpu", Box::new(cpu::resource));
         files.insert("exe", Box::new(exe::resource));
         files.insert("iostat", Box::new(iostat::resource));
+        files.insert("irq", Box::new(irq::resource));
         files.insert("log", Box::new(log::resource));
         files.insert("scheme", Box::new(scheme::resource));
         files.insert("scheme_num", Box::new(scheme_num::resource));
@@ -54,7 +56,7 @@ impl SysScheme {
         files.insert("uname", Box::new(uname::resource));
         files.insert("env", Box::new(|| Ok(Vec::from(crate::init_env()))));
         #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-        files.insert("spurious_irq", Box::new(irq::spurious_irq_resource));
+        files.insert("spurious_irq", Box::new(interrupt::irq::spurious_irq_resource));
 
         SysScheme {
             next_id: AtomicUsize::new(0),