This will be the end of me

Cargo.lock

@@ -20,6 +20,15 @@ version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5c6cb57a04249c6480766f7f7cef5467412af1490f8d1e243141daddada3264f"
 
+[[package]]
+name = "approx"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cab112f0a86d568ea0e627cc1d6be74a1e9cd55214684db5561995f6dad897c6"
+dependencies = [
+ "num-traits",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.3.0"
@@ -111,11 +120,13 @@ name = "kernel"
 version = "0.1.0"
 dependencies = [
  "bitflags 2.5.0",
+ "cfg-if",
  "crossbeam",
  "hashbrown",
  "lazy_static",
  "log",
  "multiboot2",
+ "nalgebra",
  "once",
  "pc-keyboard",
  "pic8259",
@@ -164,6 +175,57 @@ dependencies = [
  "uefi-raw",
 ]
 
+[[package]]
+name = "nalgebra"
+version = "0.33.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c4b5f057b303842cf3262c27e465f4c303572e7f6b0648f60e16248ac3397f4"
+dependencies = [
+ "approx",
+ "num-complex",
+ "num-rational",
+ "num-traits",
+ "simba",
+ "typenum",
+]
+
+[[package]]
+name = "num-complex"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73f88a1307638156682bada9d7604135552957b7818057dcef22705b4d509495"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f83d14da390562dca69fc84082e73e548e1ad308d24accdedd2720017cb37824"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "once"
 version = "0.3.4"
@@ -176,6 +238,12 @@ version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
+[[package]]
+name = "paste"
+version = "1.0.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
+
 [[package]]
 name = "pc-keyboard"
 version = "0.7.0"
@@ -250,6 +318,18 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
+[[package]]
+name = "simba"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3a386a501cd104797982c15ae17aafe8b9261315b5d07e3ec803f2ea26be0fa"
+dependencies = [
+ "approx",
+ "num-complex",
+ "num-traits",
+ "paste",
+]
+
 [[package]]
 name = "spin"
 version = "0.5.2"
@@ -296,6 +376,12 @@ dependencies = [
  "lock_api",
 ]
 
+[[package]]
+name = "typenum"
+version = "1.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
+
 [[package]]
 name = "uart_16550"
 version = "0.3.0"

Cargo.toml

@@ -5,3 +5,8 @@ members = [
 
 exclude = ["boot"]
 resolver = "2"
+
+
+[profile.release]
+strip = false
+

boot/multiboot.s

@@ -1,3 +1,10 @@
+%define VIDEO_MODE 1
+
+section .data
+global __VIDEO_MODE
+__VIDEO_MODE: db VIDEO_MODE
+
+
 section .multiboot_header
 header_start:
     dd 0xe85250d6                ; magic number (multiboot 2)
@@ -8,7 +15,17 @@ header_start:
 
     ; insert optional multiboot tags here
 
-    ; required end tag
+%if VIDEO_MODE
+    dw 5 ; type
+    dw 1 ; flags
+    dd 20 ; size
+    dd 0  ; width
+    dd 0  ; height
+    dd 24  ; depth
+    ; grub 2 expects 8 byte alignment
+    dw 0 ; padding
+    dw 0 ; padding
+%endif
     dw 0    ; type
     dw 0    ; flags
     dd 8    ; size

build.sh

@@ -2,6 +2,9 @@ BUILD_DIR="./target"
 BIN="$BUILD_DIR/poppin.bin"
 ISO="$BUILD_DIR/poppin.iso"
 
+# config
+VIDEO_MODE=true;
+
 set -e
 
 function cmd_exists() {

kernel/Cargo.toml

@@ -2,7 +2,6 @@
 name = "kernel"
 version = "0.1.0"
 edition = "2021"
-test=false
 
 [lib]
 name="kernel"
@@ -10,16 +9,15 @@ test=false
 crate-type=["staticlib"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[profile.release]
-strip = false
-
 [dependencies]
 bitflags = "2.5.0"
+cfg-if = "1.0.0"
 crossbeam = { version = "0.8.4", default-features = false, features = ["alloc"] }
 hashbrown = "0.14.5"
 lazy_static = { version = "1.4.0", features = ["spin_no_std"] }
 log = "0.4.21"
 multiboot2 = "0.20.2"
+nalgebra = { version = "0.33.0", default-features = false }
 once = "0.3.4"
 pc-keyboard = "0.7.0"
 pic8259 = "0.11.0"

kernel/src/events/mod.rs

@@ -37,12 +37,10 @@ impl EventManager {
     }
 
     pub fn dispatch(&self, ev: &Event){
-        for listener in &self.listeners {
+        for listener in self.listeners.iter().flatten() {
-            if let Some(l) = listener {
+            if discriminant(ev) == discriminant(&listener.typ) {
-                if discriminant(ev) == discriminant(&l.typ) {
+                // TODO: Do something with the result
-                    // TODO: Do something with the result
+                let _ = (listener.func)(ev);
-                    let _ = (l.func)(ev);
-                }
             }
         }
     }

kernel/src/gdt/mod.rs

@@ -21,14 +21,12 @@ lazy_static! {
             
             #[allow(unused_unsafe)]
             let stack_start = VirtAddr::from_ptr(unsafe { addr_of!(STACK) });
-            let stack_end = stack_start + STACK_SIZE as u64;
+            stack_start + STACK_SIZE as u64
-            stack_end
         };
         tss.privilege_stack_table[0] = {
             #[allow(unused_unsafe)]
             let stack_start = VirtAddr::from_ptr(unsafe { addr_of!(PRIV_TSS_STACK) });
-            let stack_end = stack_start + STACK_SIZE as u64;
+            stack_start + STACK_SIZE as u64
-            stack_end
         };
         tss
     };

kernel/src/interrupts/handlers/mod.rs

@@ -1,5 +1,5 @@
 use x86_64::structures::idt::{InterruptStackFrame, PageFaultErrorCode};
-use crate::{events::EVENTMAN, interrupts::InterruptIndex};
+use crate::interrupts::InterruptIndex;
 
 mod ps2_keyboard;
 

kernel/src/interrupts/handlers/ps2_keyboard.rs

@@ -1,14 +1,10 @@
-use hashbrown::HashSet;
-use pc_keyboard::{DecodedKey, KeyState};
-use spin::Mutex;
 use x86_64::structures::idt::InterruptStackFrame;
 
 use crate::{events::EVENTMAN, interrupts::PICS};
 
-pub struct Ps2KbPressEvent(DecodedKey);
 
 pub extern "x86-interrupt" fn ps2_kb_int(_sf: InterruptStackFrame){
-    use pc_keyboard::{layouts, DecodedKey, HandleControl, Keyboard, ScancodeSet1};
+    use pc_keyboard::{layouts, HandleControl, Keyboard, ScancodeSet1};
     use spin::Mutex;
     use x86_64::instructions::port::Port;
 

kernel/src/lib.rs

@@ -6,13 +6,12 @@
 #![feature(ptr_internals)]
 #![feature(allocator_api)]
 
-use core::ptr::addr_of;
+use std::vga::video::Color;
 
-use alloc::vec::Vec;
+use mem::paging::ActivePageTable;
-use pc_keyboard::{DecodedKey, KeyCode};
+use multiboot2::{BootInformation, BootInformationHeader};
-use x86_64::instructions::nop;
+use pc_keyboard::KeyCode;
 
-use crate::{gdt::PRIV_TSS_STACK, scheduler::{executor::Executor, Task}, utils::jmp_to_usermode};
 
 extern crate alloc;
 
@@ -27,50 +26,24 @@ mod mem;
 mod scheduler;
 mod std;
 
-
+fn init(mb2p: *const BootInformationHeader) -> ActivePageTable {
-
-#[no_mangle]
-extern "C" fn kmain(mb2_info_addr: usize) -> ! {
-    // Init
     logger::init(log::LevelFilter::Trace).unwrap();
     gdt::init();
     interrupts::init_idt();
     utils::enable_nxe_bit();
     utils::enable_write_protect_bit();
     std::init();
+    mem::init(mb2p)
+}
+
+#[no_mangle]
+extern "C" fn kmain(mb2p: *const BootInformationHeader) -> ! {
+    let _ = init(mb2p); // active table
     
-    let active_table = mem::init(mb2_info_addr);
+    let vc = std::vga::video::VideoControler::new(mb2p);
-    
+    // vc.set_px(0, 0, Color::new(0xFF, 0xFF, 0x0));
-    //unsafe {
+    // vc.fill_screen(Color::new(0xFF, 0x0, 0x0));
-    //    jmp_to_usermode(active_table, usermode_code as *const () as usize, addr_of!(PRIV_TSS_STACK) as *const () as usize);
-    //}
 
-    //let mut executor = Executor::new();
-    //executor.spawn(Task::new(usermode_code()));
-    //executor.run();
-
-    //let mut a = Vec::new();
-    
-
-    //a.push(6);
-    //a.push(9);
-    //a.push(4);
-    //a.push(2);
-    //a.push(0);
-    
-    //log::error!("{:?}", a); 
-
-
-    
-    // EVENTMAN.lock().add_listener(events::Event::Ps2KeyPress(None), |k| {
-    //    let Event::Ps2KeyPress(v) = k else {panic!()};
-    //
-    //    log::debug!("Keypress event received! ({:?})", v.unwrap());
-    //   Ok(())
-    // });
-
-    // let (level_4_page_table, _) = Cr3::read();
-    // println!("Level 4 page table at: {:?}", level_4_page_table.start_address());
     log::info!("end of work");
     loop {
         if std::input::is_key_down(KeyCode::A) {
@@ -88,6 +61,3 @@ fn panic(pi: &core::panic::PanicInfo) -> ! {
 }
 
 
-async fn usermode_code() {
-    log::info!("Hello from usermode!");
-}

kernel/src/logger/mod.rs

@@ -1,12 +1,9 @@
-
+use core::fmt::Write;
 use log::{Level, LevelFilter, Metadata, Record, SetLoggerError};
-
 use crate::logger::serial::{write_com, ANSI_COLORS, COM0};
+use crate::std::vga::text::{Color, ColorCode, WRITER};
 
-use self::vga::{Color, ColorCode, WRITER};
 
-#[macro_use]
-pub mod vga;
 pub mod serial;
 #[macro_use]
 pub mod macros;
@@ -16,7 +13,6 @@ pub static LOGGER: KLogger = KLogger;
 pub struct KLogger;
 
 
-
 const C_TRACE: ColorCode = ColorCode::new(Color::Cyan, Color::Black);
 const C_DEBUG: ColorCode = ColorCode::new(Color::Blue, Color::Black);
 const C_INFO: ColorCode = ColorCode::new(Color::Green, Color::Black);
@@ -32,51 +28,77 @@ impl log::Log for KLogger {
 
     fn log(&self, record: &Record) {
         if self.enabled(record.metadata()) {
-            {WRITER.lock().set_color(Color::Magenta, Color::Black); }
+            if !crate::std::vga::video::is_video_mode_enabled() {
-            print!("[");
+                self.log_vga(record).unwrap();
-            write_com(&COM0, format_args!("{}[", ANSI_COLORS::MAGENTA));
-            match record.level() {
-                Level::Trace => {
-                    {WRITER.lock().set_color_code(C_TRACE); }
-                    print!("TRACE");
-                    write_com(&COM0, format_args!("{}TRACE", ANSI_COLORS::BLUE2));
-                }
-                Level::Debug => {
-                    {WRITER.lock().set_color_code(C_DEBUG); }
-                    print!("DEBUG");
-                    write_com(&COM0, format_args!("{}DEBUG", ANSI_COLORS::BLUE));
-                }
-                Level::Info => {
-                    {WRITER.lock().set_color_code(C_INFO); }
-                    print!("INFO");
-                    write_com(&COM0, format_args!("{}INFO", ANSI_COLORS::GREEN));
-                }
-                Level::Warn => {
-                    {WRITER.lock().set_color_code(C_WARN); }
-                    print!("WARN");
-                    write_com(&COM0, format_args!("{}WARN", ANSI_COLORS::YELLOW));
-                }
-                Level::Error => {
-                    {WRITER.lock().set_color_code(C_ERROR); }
-                    print!("ERROR");
-                    write_com(&COM0, format_args!("{}ERROR", ANSI_COLORS::RED));
-                }
             }
-            {WRITER.lock().set_color(Color::Magenta, Color::Black); }
+            self.log_serial(record)
-            print!("]");
-            {WRITER.lock().set_color_code(C_NORMAL); }
-
-            write_com(&COM0, format_args!("{}]", ANSI_COLORS::MAGENTA));
-            
-            println!(" {}: {}", record.module_path().unwrap_or(""), record.args());
-
-            write_com(&COM0, format_args!(" {}{}: {}\n", ANSI_COLORS::RESET, record.module_path().unwrap_or(""), record.args()));
         }
     }
 
     fn flush(&self) {}
 }
 
+impl KLogger {
+    fn log_vga(&self, record: &Record) -> core::fmt::Result {
+        let mut f = WRITER.lock();
+        f.set_color(Color::Magenta, Color::Black);
+        write!(f, "[")?;
+        match record.level() {
+            Level::Trace => {
+                f.set_color_code(C_TRACE);
+                write!(f, "TRACE")?;
+            }
+            Level::Debug => {
+                f.set_color_code(C_DEBUG);
+                write!(f, "DEBUG")?;
+            }
+            Level::Info => {
+                f.set_color_code(C_INFO);
+                write!(f, "INFO")?;
+            }
+            Level::Warn => {
+                f.set_color_code(C_WARN);
+                write!(f, "WARN")?;
+            }
+            Level::Error => {
+                f.set_color_code(C_ERROR);
+                write!(f, "ERROR")?;
+            }
+        }
+        f.set_color(Color::Magenta, Color::Black);
+        write!(f, "]")?;
+        f.set_color_code(C_NORMAL);
+
+        writeln!(f, " {}: {}", record.module_path().unwrap_or(""), record.args())?;
+        Ok(())
+    }
+    fn log_serial(&self, record: &Record) {
+        {WRITER.lock().set_color(Color::Magenta, Color::Black); }
+            write_com(&COM0, format_args!("{}[", ANSI_COLORS::MAGENTA));
+            match record.level() {
+                Level::Trace => {
+                    write_com(&COM0, format_args!("{}TRACE", ANSI_COLORS::BLUE2));
+                }
+                Level::Debug => {
+                    write_com(&COM0, format_args!("{}DEBUG", ANSI_COLORS::BLUE));
+                }
+                Level::Info => {
+                    write_com(&COM0, format_args!("{}INFO", ANSI_COLORS::GREEN));
+                }
+                Level::Warn => {
+                    write_com(&COM0, format_args!("{}WARN", ANSI_COLORS::YELLOW));
+                }
+                Level::Error => {
+                    write_com(&COM0, format_args!("{}ERROR", ANSI_COLORS::RED));
+                }
+            }
+
+            write_com(&COM0, format_args!("{}]", ANSI_COLORS::MAGENTA));            
+            write_com(&COM0, format_args!(" {}{}: {}\n", ANSI_COLORS::RESET, record.module_path().unwrap_or(""), record.args()));
+
+    }
+}
+
 pub fn init(lvl: LevelFilter) ->  Result<(), SetLoggerError> {
     log::set_logger(&LOGGER)?;
     log::set_max_level(lvl);

kernel/src/logger/vga/macros.rs

@@ -1,30 +0,0 @@
-use core::fmt;
-use x86_64::instructions::interrupts;
-
-use crate::logger::vga::Writer;
-
-impl fmt::Write for Writer {
-    fn write_str(&mut self, s: &str) -> fmt::Result {
-        self.write_string(s);
-        Ok(())
-    }
-}
-
-#[macro_export]
-macro_rules! print {
-    ($($arg:tt)*) => ($crate::logger::vga::macros::_print(format_args!($($arg)*)));
-}
-
-#[macro_export]
-macro_rules! println {
-    () => ($crate::print!("\n"));
-    ($($arg:tt)*) => ($crate::print!("{}\n", format_args!($($arg)*)));
-}
-
-#[doc(hidden)]
-pub fn _print(args: fmt::Arguments) {
-    use core::fmt::Write;
-    interrupts::without_interrupts(|| {
-        crate::logger::vga::WRITER.lock().write_fmt(args).unwrap();
-    });
-}

kernel/src/mem/heap/mod.rs

@@ -2,7 +2,7 @@
 
 //use x86_64::align_up;
 
-pub const HEAP_START: usize = 0o_000_001_000_000_0000; // 0x40000000 - 0x40019000
+pub const HEAP_START: usize = 0x40000000; // 0x40000000 - 0x40019000
 pub const HEAP_SIZE: usize = 100 * 1024; // 100 KiB
 
 // A simple allocator that allocates memory linearly and ignores freed memory.

kernel/src/mem/mod.rs

@@ -20,7 +20,9 @@ static GLOBAL_ALLOCATOR: Talck<spin::Mutex<()>, ErrOnOom> = Talc::new(ErrOnOom).
 
 pub struct DummyAlloc;
 unsafe impl GlobalAlloc for DummyAlloc {
-    unsafe fn alloc(&self, _: Layout) -> *mut u8 { 0 as *mut u8 }
+    unsafe fn alloc(&self, _: Layout) -> *mut u8 { 
+        core::ptr::null_mut::<u8>()
+    }
     unsafe fn dealloc(&self, _ptr: *mut u8, _: Layout) {}
 }
 
@@ -122,12 +124,14 @@ pub struct MemInfo<'a>{
     pub kernel_end: usize,
     pub mb_start: usize,
     pub mb_end: usize,
+    pub vga_vide_start: usize,
+    pub vga_vide_size: usize,
 }
 
 impl MemInfo<'_> {
-    pub fn load(mb_ptr: usize) -> Self {
+    pub fn load(mb_ptr: *const BootInformationHeader) -> Self {
         let boot_info = unsafe {
-            multiboot2::BootInformation::load(mb_ptr as *const BootInformationHeader).unwrap()
+            multiboot2::BootInformation::load(mb_ptr).unwrap()
         };
         let mmap_tag = boot_info.memory_map_tag().unwrap();
 
@@ -146,22 +150,27 @@ impl MemInfo<'_> {
         let kernel_end = elf_secs.clone().filter(|s| s.is_allocated()).map(|s| s.end_address()).min().unwrap() as usize;
         let mb_start = boot_info.start_address();
         let mb_end = boot_info.end_address();
+        let vv_info = boot_info.framebuffer_tag().unwrap().unwrap();
+        let vv_start = vv_info.address();
+        let vv_size = vv_info.width() * vv_info.height();
 
         //log::debug!("Kernel: start: 0x{:x} sz: 0x{:x}", mi.kernel_start, mi.kernel_end - mi.kernel_start);
         //log::debug!("Multiboot: start: 0x{:x} sz: 0x{:x}", mi.mb_start, mi.mb_end - mi.mb_start);
         
         Self {
-            boot_info:unsafe { multiboot2::BootInformation::load(mb_ptr as *const BootInformationHeader).unwrap()},
+            boot_info: unsafe { multiboot2::BootInformation::load(mb_ptr).unwrap()},
             mem_area_iter: MemoryAreaIter::new(mmap_tag),
             kernel_start,
             kernel_end,
             mb_start,
             mb_end,
+            vga_vide_start: vv_start as usize,
+            vga_vide_size: vv_size as usize
         }
     }
 }
 
-pub fn init(mb_ptr: usize) -> paging::ActivePageTable {
+pub fn init(mb_ptr: *const BootInformationHeader) -> paging::ActivePageTable {
     once::assert_has_not_been_called!("mem::init must be called only once");
     let mem_info = MemInfo::load(mb_ptr);
     let mut frame_alloc = area_frame_alloc::AreaFrameAllocator::new(&mem_info);

kernel/src/mem/paging/entry.rs

@@ -28,13 +28,13 @@ impl EntryFlags {
 
         if section.flags().contains(ElfSectionFlags::ALLOCATED) {
             // section is loaded to memory
-            flags = flags | EntryFlags::PRESENT;
+            flags |= EntryFlags::PRESENT;
         }
         if section.flags().contains(ElfSectionFlags::WRITABLE) {
-            flags = flags | EntryFlags::WRITABLE;
+            flags |= EntryFlags::WRITABLE;
         }
         if !section.flags().contains(ElfSectionFlags::EXECUTABLE) {
-            flags = flags | EntryFlags::NO_EXECUTE;
+            flags |= EntryFlags::NO_EXECUTE;
         }
 
         flags

kernel/src/mem/paging/mapper.rs

@@ -7,7 +7,7 @@ use super::{
     Frame, FrameAllocator,
     PAGE_SIZE, PhysicalAddress,
     VirtualAddress, Page,
-    ENTRY_COUNT, InactivePageTable
+    ENTRY_COUNT,
 };
 use core::ptr::Unique;
 

kernel/src/mem/paging/mod.rs

@@ -1,3 +1,4 @@
+#![allow(unexpected_cfgs)]
 use core::ops::{Deref, DerefMut};
 use self::{entry::*, mapper::Mapper, temporary::TemporaryPage};
 use super::{Frame, FrameAllocator, MemInfo, PAGE_SIZE};
@@ -119,8 +120,8 @@ impl InactivePageTable {
 
 impl Page {
     pub fn containing_address(address: VirtualAddress) -> Page {
-        assert!(address < 0x0000_8000_0000_0000 ||
+        assert!(
-            address >= 0xffff_8000_0000_0000,
+            !(0x0000_8000_0000_0000..0xffff_8000_0000_0000).contains(&address),
             "invalid address: 0x{:x}", address);
         Page { number: address / PAGE_SIZE }
     }
@@ -137,7 +138,7 @@ impl Page {
         (self.number >> 9) & 0o777
     }
     fn p1_index(&self) -> usize {
-        (self.number >> 0) & 0o777
+        self.number & 0o777
     }
     pub fn range_inclusive(start: Page, end: Page) -> PageIter {
         PageIter {
@@ -204,8 +205,13 @@ pub fn remap_the_kernel<A>(allocator: &mut A, mem_info: &MemInfo) -> ActivePageT
                 mapper.identity_map(frame, flags, allocator);
             }
         }
-        let vga_buffer_frame = Frame::containing_address(0xb8000);
+        let vga_text_buffer_frame = Frame::containing_address(0xb8000);
-        mapper.identity_map(vga_buffer_frame, EntryFlags::WRITABLE, allocator);
+        let vga_video_buffer_frame_start = Frame::containing_address(mem_info.vga_vide_start);
+        let vga_video_buffer_frame_end = Frame::containing_address((mem_info.vga_vide_start + mem_info.vga_vide_size*3));
+        for frame in Frame::range_inclusive(vga_video_buffer_frame_start, vga_video_buffer_frame_end) {
+            mapper.identity_map(frame, EntryFlags::PRESENT | EntryFlags::WRITABLE, allocator);
+        }
+        mapper.identity_map(vga_text_buffer_frame, EntryFlags::WRITABLE, allocator);
         let multiboot_start = Frame::containing_address(mem_info.boot_info.start_address());
         let multiboot_end = Frame::containing_address(mem_info.boot_info.end_address() - 1);
         for frame in Frame::range_inclusive(multiboot_start, multiboot_end) {
@@ -225,8 +231,7 @@ pub fn remap_the_kernel<A>(allocator: &mut A, mem_info: &MemInfo) -> ActivePageT
     active_table
 }
 
-
+#[cfg(disabled)]
-
 pub fn test_paging<A>(allocator: &mut A)
     where A: FrameAllocator
 {

kernel/src/mem/paging/tables.rs

@@ -44,12 +44,12 @@ impl<L> Table<L> where L: HierarchicalLevel {
         self.next_table_mut(index).unwrap()
     }
 
-    pub fn next_table<'a>(&'a self, index: usize) -> Option<&'a Table<L::NextLevel>> {
+    pub fn next_table(&self, index: usize) -> Option<&Table<L::NextLevel>> {
         self.next_table_address(index)
             .map(|address| unsafe { &*(address as *const _) })
     }
 
-    pub fn next_table_mut<'a>(&'a mut self, index: usize) -> Option<&'a mut Table<L::NextLevel>> {
+    pub fn next_table_mut(&mut self, index: usize) -> Option<&mut Table<L::NextLevel>> {
         self.next_table_address(index)
             .map(|address| unsafe { &mut *(address as *mut _) })
     }

kernel/src/mem/paging/temporary.rs

@@ -18,7 +18,7 @@ impl TemporaryPage {
         where A: FrameAllocator
     {
         TemporaryPage {
-            page: page,
+            page,
             allocator: TinyAllocator::new(allocator),
         }
     }

kernel/src/scheduler/executor.rs

@@ -1,3 +1,4 @@
+#![allow(dead_code)]
 use core::task::{Context, Poll, Waker};
 
 use super::{Task, TaskId};
@@ -53,7 +54,7 @@ impl Executor {
             };
             let waker = waker_cache
                 .entry(task_id)
-                .or_insert_with(|| TaskWaker::new(task_id, task_queue.clone()));
+                .or_insert_with(|| TaskWaker::new_waker(task_id, task_queue.clone()));
             let mut context = Context::from_waker(waker);
             match task.poll(&mut context) {
                 Poll::Ready(()) => {
@@ -77,7 +78,7 @@ impl TaskWaker {
     fn wake_task(&self) {
         self.task_queue.push(self.task_id).expect("task_queue full");
     }
-    fn new(task_id: TaskId, task_queue: Arc<ArrayQueue<TaskId>>) -> Waker {
+    fn new_waker(task_id: TaskId, task_queue: Arc<ArrayQueue<TaskId>>) -> Waker {
         Waker::from(Arc::new(TaskWaker {
             task_id,
             task_queue,
@@ -96,3 +97,4 @@ impl Wake for TaskWaker {
 }
 
 
+

kernel/src/scheduler/mod.rs

@@ -1,3 +1,4 @@
+#![allow(dead_code)]
 use core::{future::Future, pin::Pin, sync::atomic::{AtomicU64, Ordering}, task::{Context, Poll}};
 use alloc::boxed::Box;
 

kernel/src/std/input.rs

@@ -1,9 +1,6 @@
-use alloc::{boxed::Box, collections::{btree_set::BTreeSet, vec_deque::VecDeque}, sync::Arc, vec::Vec};
+use alloc::collections::{btree_set::BTreeSet, vec_deque::VecDeque};
-use hashbrown::HashSet;
+use pc_keyboard::{KeyCode, KeyEvent, KeyState};
-use lazy_static::lazy_static;
-use pc_keyboard::{DecodedKey, KeyCode, KeyEvent, KeyState};
 use spin::Mutex;
-use x86_64::instructions::nop;
 
 use crate::events::{Event, EVENTMAN};
 static mut KEYS_PRESSED: Mutex<BTreeSet<KeyCode>> = Mutex::new(BTreeSet::new());

kernel/src/std/mod.rs

@@ -1,5 +1,5 @@
 pub mod input;
-
+pub mod vga;
 
 
 

kernel/src/std/vga/mod.rs

@@ -0,0 +1,2 @@
+pub mod text;
+pub mod video;

kernel/src/std/vga/text/mod.rs

@@ -1,9 +1,7 @@
 use x86::io::{outb, inb};
 
 use spin::Mutex;
-
+use x86_64::instructions::interrupts;
-#[macro_use]
-pub mod macros;
 
 lazy_static::lazy_static!{
     pub static ref WRITER: Mutex<Writer> = Mutex::new(Writer::new());
@@ -93,7 +91,7 @@ impl Writer {
         }
     }
 
-    pub fn write_string(&mut self, s: &str) {
+    fn write_string(&mut self, s: &str) {
         for c in s.as_bytes() {
             match c {
                 // printable ASCII byte or newline
@@ -197,3 +195,12 @@ pub fn get_cursor_position() -> (u16, u16) {
     }
     (pos / (BUFFER_WIDTH as u16), pos % (BUFFER_WIDTH as u16))
 }
+
+impl core::fmt::Write for Writer {
+    fn write_str(&mut self, s: &str) -> core::fmt::Result {
+        interrupts::without_interrupts(|| {    
+            self.write_string(s);
+        });
+        Ok(())
+    }
+}

kernel/src/std/vga/video/mod.rs

@@ -0,0 +1,72 @@
+mod util;
+use core::{borrow::BorrowMut, ops::Deref};
+
+use alloc::boxed::Box;
+use lazy_static::lazy_static;
+use multiboot2::{BootInformation, BootInformationHeader, FramebufferTag, FramebufferType, TagTrait};
+use nalgebra::Vector2;
+use spin::{Mutex, MutexGuard};
+pub use util::is_video_mode_enabled;
+
+
+#[derive(Clone, Copy)]
+pub struct Color {
+    r: u8,
+    g: u8,
+    b: u8,
+}
+
+impl Color {
+    pub fn new(r: u8, g: u8, b: u8) -> Self {
+        Self {r, g, b}
+    }
+}
+
+pub struct VideoControler{
+    component_size: u8,
+    r_ofs: u8,
+    g_ofs: u8,
+    b_ofs: u8,
+    buf_addr: u64,
+    size: Vector2<usize>,
+}
+
+impl VideoControler {
+    pub fn new(mb2p: *const BootInformationHeader) -> Self {
+        let boot_info = unsafe { BootInformation::load(mb2p).unwrap() };
+        let fbt = boot_info.framebuffer_tag().unwrap().unwrap();
+        let FramebufferType::RGB { red, green, blue } = fbt.buffer_type().unwrap() else {
+            panic!();
+        };
+        assert!(red.size == green.size && green.size == blue.size);
+        log::info!("VGA VIDEO adddr: {:x}", fbt.address());
+        log::info!("VGA VIDEO FB TYPE: {:?}", fbt.buffer_type());
+        Self {
+            component_size: red.size,
+            r_ofs: red.position,
+            g_ofs: green.position,
+            b_ofs: blue.position,
+            buf_addr: fbt.address(),
+            size: Vector2::new(fbt.width() as usize, fbt.height() as usize)
+        }
+    }
+
+    pub fn set_px(&self, x: usize, y: usize, c: Color) {
+        let ptr = self.buf_addr as *mut () as *mut u8;
+        let px = ptr.wrapping_add(x * self.size.x + y);
+        unsafe {
+            *px.wrapping_add((self.r_ofs % 8) as usize) = c.r;
+            *px.wrapping_add((self.g_ofs % 8) as usize) = c.g;
+            *px.wrapping_add((self.b_ofs % 8) as usize) = c.b;
+        }
+    }
+
+    pub fn fill_screen(&self, c: Color) {    
+        for x in 0..100 {
+            for y in 0..100 {
+                self.set_px(x, y, c);
+            }
+        }
+    }
+    
+}

kernel/src/std/vga/video/util.rs

@@ -0,0 +1,9 @@
+extern "C" {
+    static __VIDEO_MODE: u8;
+}
+
+pub fn is_video_mode_enabled() -> bool {
+    unsafe {
+        __VIDEO_MODE == 1
+    }
+}