some stuff

kernel-rs/Makefile

@@ -6,8 +6,8 @@ TARGET	?= $(ARCH)-$(OS)
 
 all:
 	@printf "make kernel\t# build kernel binary\n"
-	@printf "make iso\t# build iso cdrom with grub\n"
-	@printf "make qemu\t# run qemu+gdb in tmux window\n"
+	@printf "make iso\t# build iso cdrom\n"
+	@printf "make qemu\t# run iso in qemu\n"
 
 ## COMPILE ASM (nasm)
 asm_source		:= $(wildcard src/arch/$(ARCH)/*.asm)
@@ -35,11 +35,12 @@ clean:
 
 .PHONY: clean kernel iso $(rust_os)
 
+# Bootloader recipes
+ISO	:= $(kernel:.bin=.iso)
+iso: $(ISO)
+include mk/grub.mk
+
 # Emulation recipes
 include mk/qemu.mk
 
-# Bootloader recipes
-include mk/grub.mk
-iso: $(grub-iso)
-
 kernel: $(kernel)

kernel-rs/mk/grub.mk

@@ -1,8 +1,7 @@
-grub-iso	:= $(kernel:.bin=.iso)
 grub-cfg	:= src/arch/$(ARCH)/grub.cfg
 isodir		:= build/isofiles
 
-$(grub-iso): $(kernel) $(grub-cfg) Makefile
+$(ISO): $(kernel) $(grub-cfg) Makefile
 	@mkdir -p $(isodir)/boot/grub
 	@cp $(grub-cfg) $(isodir)/boot/grub
 	@cp $(kernel) $(isodir)/boot/$(OS)

kernel-rs/mk/qemu.mk

@@ -1,35 +1,24 @@
-ifeq ($(shell whoami), jack)
-	PORT_MONIT := 4242
-	PORT_GDB := 4244
-else
-	PORT_MONIT := 4342
-	PORT_GDB := 4344
-endif
+QEMU_SOCKET := /tmp/qemu.sock
+QEMU_MONITOR := socat - unix-connect:$(QEMU_SOCKET)
+QEMU_GDB_PORT := 4242
 
-QEMU		:= qemu-system-i386\
-	-cdrom build/bluesnow-x86.iso\
-	-S\
-	-enable-kvm\
-	-curses\
-	-gdb tcp::$(PORT_GDB)\
-	-monitor telnet:127.0.0.1:$(PORT_MONIT),server,nowait
 qemu:
-	$(QEMU)
+	qemu-system-i386\
+		-cdrom $(ISO)\
+		-S\
+		-enable-kvm\
+		-curses\
+		-gdb tcp::$(QEMU_GDB_PORT)\
+		-monitor unix:${QEMU_SOCKET},server,nowait
 
-GDB			:= gdb -q\
-	-symbols "$(kernel)" \
-	-ex "target remote :$(PORT_GDB)"\
-	-ex "set arch i386"
-gdb:
-	$(GDB)
+qemu-gdb:
+	gdb -q\
+		-symbols "$(kernel)" \
+		-ex "target remote :$(QEMU_GDB_PORT)"\
+		-ex "set arch i386"
 
-MONITOR 	:= telnet 127.0.0.1 $(PORT_MONIT);\
-	kill \`ps -x | grep \"[g]db -q\" | cut -d \  -f 1 \`;\
-	kill \`ps -x | grep \"[g]db -q\" | cut -d \  -f 2 \`
-monitor:
-	telnet 127.0.0.1 $(PORT_MONIT)
-
-#not using this anymore
-william:
-	@tmux info >&- || { echo -e "\033[38;5;16mPlease run inside a tmux session\033[0m" ; exit 1; }
-	@tmux new-window 'tmux split-window -h "$(MONITOR)"; tmux split-window -fv "$(GDB)"; tmux select-pane -t 1; tmux resize-pane -x 80 -y 25; $(QEMU)'
+qemu-monitor:
+	$(QEMU_MONITOR)
+qemu-reload:
+	echo "change ide1-cd0 $(ISO)" | $(QEMU_MONITOR) &>-
+	echo "system_reset" | $(QEMU_MONITOR) &>-

kernel-rs/src/arch/x86/interrupt/irq.rs

@@ -56,9 +56,6 @@ interrupt!(0, pit, {
         let sum = offset.1 + PIT_RATE;
         offset.1 = sum % 1_000_000;
         offset.0 += sum / 1_000_000;
-        if sum > 1_000_000 {
-            // fprintln!("uptime: {}s", offset.0);
-        }
     }
     unsafe { pic::MASTER.ack() };
 });

kernel-rs/src/console.rs

@@ -2,6 +2,7 @@ extern crate core;
 // extern crate multiboot2;
 
 use acpi;
+use time;
 use keyboard::PS2;
 use core::char;
 use vga::*;
@@ -28,6 +29,9 @@ fn dispatch(command: &str) -> Result<(), &'static str> {
         "overflow" => self::overflow(),
         "page_fault" => self::page_fault(),
 
+        // time
+        "uptime" => self::uptime(),
+
         _ => Err("Command unknown. (h|help for help)"),
     }
 }
@@ -59,6 +63,13 @@ fn help() -> Result<(), &'static str> {
     Ok(())
 }
 
+fn uptime() -> Result<(), &'static str> {
+    let mut offset = time::OFFSET.lock();
+    fprintln!("{}s", offset.0 + offset.1 / 1_000_000);
+    flush!();
+    Ok(())
+}
+
 use x86::instructions::halt;
 /// Reboot the kernel
 ///

kernel-rs/src/lib.rs

@@ -54,10 +54,11 @@ pub fn kmain() -> ! {
     // memory init after heap is available
     memory::init_noncore();
 
-    // vga is *not* cpu specific I think
+    // load vga after core because is *not* cpu specific I think
     vga::init();
 
-    scheduling::schedule();
+    // scheduler WIP
+    // scheduling::schedule();
     unreachable!();
 }
 

kernel-rs/src/scheduling/mod.rs

@@ -1,9 +1,10 @@
 mod process;
+mod sleep;
+
 mod fifo;
 
 use spin::Mutex;
 pub use self::process::*; 
-
 lazy_static! {
     pub static ref SCHEDULER: Mutex<fifo::Fifo> = Mutex::new({
         let init_process: u32 = self::init as *const () as u32;
@@ -13,6 +14,7 @@ lazy_static! {
     });
 }
 
+/// Scheduler algorithm needs to implement this
 pub trait Scheduler {
     fn add_task(&mut self, ip: u32);
     fn next(&mut self) -> Option<Process>;
@@ -42,7 +44,9 @@ pub fn fork() -> i32 {
     0
 }
 
-pub fn sleep() {}
+pub fn sleep() {
+    
+}
 
 pub fn init() {
     fprintln!("init first line");

kernel-rs/src/scheduling/sleep.rs

@@ -4,3 +4,38 @@
 //! managing these
 //!
 //! inspired from https://wiki.osdev.org/Blocking_Process
+
+use alloc::VecDeque;
+use super::*;
+
+struct Sleeper {
+    process: Process,
+    // ms
+    ticks: u32,
+}
+
+/// osdev calls this a delta queue but google doesnt know
+struct DeltaQueue {
+    queue: VecDeque<Sleeper>,
+}
+
+impl DeltaQueue {
+    pub fn insert(&mut self, process: Process, ticks: u32) {
+        let sleeper = Sleeper { process, ticks };
+    }
+
+    /// decreases timer on the list and returns the number
+    /// of finished sleepers
+    pub fn tick(&mut self) -> u32 {
+        let mut i: u32 = 0;
+        while let Some(link) = self.queue.get_mut(i as usize) {
+            // find how many links have 0 ticks left
+            if link.ticks > 0 {
+                link.ticks -= 1;
+                break;
+            }
+            i += 1;
+        }
+        i
+    }
+}