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feat: change font and release greate tty output

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This commit is contained in:
Faynot
2026-06-26 22:07:16 +03:00
parent 3f87a93d52
commit b59779ca4a
13 changed files with 183 additions and 139 deletions
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12
kernel/src/cpu/idt.rs
View File

@@ -53,17 +53,7 @@ impl InterruptDescriptorTable {
pub fn set_handler(&mut self, vector: u8, handler: u64) {
// 0x8E = Interrupt Gate, Ring 0, Present
self.entries[vector as usize].set_handler(handler, 0x28, 0x8E); // 0x28 - Kernel CS в Limine (по стандарту 5-й сегмент)
self.entries[vector as usize].set_handler(handler, 0x28, 0x8E);
}
pub unsafe fn load(&'static self) {
let ptr = IdtPtr {
limit: (core::mem::size_of::<Self>() - 1) as u16,
base: self as *const _ as u64,
};
// Исправление для Rust 2024: явный unsafe блок внутри unsafe fn
unsafe {
asm!("lidt [{}]", in(reg) &ptr, options(readonly, nostack, preserves_flags));
}
}
}

18
kernel/src/cpu/interrupts.rs
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@@ -1,12 +1,10 @@
use core::arch::global_asm;
use core::arch::asm;
use crate::mem::vmm::KERNEL_SPACE; // Оставили только один импорт
use crate::mem::vmm::KERNEL_SPACE;
use crate::mem::address::VirtAddr;
// Глобальная статическая таблица дескрипторов прерываний (IDT)
pub static mut IDT: crate::cpu::idt::InterruptDescriptorTable = crate::cpu::idt::InterruptDescriptorTable::new();
// Низкоуровневый ассемблерный трамплин (Context Save & Restore)
global_asm!(
".global page_fault_stub",
"page_fault_stub:",
@@ -80,10 +78,8 @@ pub extern "C" fn rust_page_fault_handler(error_code: u64) {
let present = (error_code & 0x1) != 0;
let virt_addr = VirtAddr(fault_addr);
// 1. Сначала применяем все отложенные отзывы прав из других Actor'ов (чтобы избежать Deadlock)
process_deferred_mmu_events();
// 2. Теперь захватываем VMM для обработки текущего сбоя
let mut vmm_guard = KERNEL_SPACE.lock();
if let Some(space) = vmm_guard.as_mut() {
@@ -91,11 +87,11 @@ pub extern "C" fn rust_page_fault_handler(error_code: u64) {
Ok(_) => return,
Err(e) => {
panic!(
"KERNEL PANIC: Необработанный сбой виртуальной памяти (Page Fault)!\n\
Адрес: {:#X}\n\
Режим: {}\n\
Присутствие: {}\n\
Причина VMM: {:?}",
"KERNEL PANIC: Unprocessed failure of virtual memory (Page Fault)!\n\
Address: {:#X}\n\
Mode: {}\n\
Presence: {}\n\
Cause VMM: {:?}",
fault_addr,
if write { "WRITE" } else { "READ" },
if present { "YES (Protection Violation)" } else { "NO (Not Present)" },
@@ -105,7 +101,7 @@ pub extern "C" fn rust_page_fault_handler(error_code: u64) {
}
} else {
panic!(
"KERNEL PANIC: Критический Page Fault до аллокации глобального KERNEL_SPACE!\n\
"KERNEL PANIC: Critical Page Fault before alocate global KERNEL_SPACE!\n\
Адрес сбоя: {:#X}",
fault_addr
);

26
kernel/src/debug.rs
View File

@@ -1,8 +1,5 @@
pub mod serial;
use embedded_graphics::pixelcolor::Rgb888;
use embedded_graphics::prelude::RgbColor;
pub enum LogLevel {
Info, Warn, Error,
}
@@ -16,11 +13,11 @@ impl LogLevel {
}
}
pub fn console_color(&self) -> Rgb888 {
pub fn console_color(&self) -> u32 {
match self {
LogLevel::Info => Rgb888::GREEN,
LogLevel::Warn => Rgb888::YELLOW,
LogLevel::Error => Rgb888::RED,
LogLevel::Info => 0x00FF00, // GREEN
LogLevel::Warn => 0xFFFF00, // YELLOW
LogLevel::Error => 0xFF0000, // RED
}
}
}
@@ -29,24 +26,23 @@ impl LogLevel {
macro_rules! log {
($console:expr, $level:expr, $module:expr, $($arg:tt)*) => {{
use core::fmt::Write;
use embedded_graphics::pixelcolor::Rgb888;
// Visual screen output
$console.set_color($level.console_color());
let _ = write!($console, "[ LOG ] ");
$console.set_color(Rgb888::WHITE);
$console.set_color(0xFFFFFF); // WHITE
let _ = write!($console, "{:<6} | ", $module);
let _ = writeln!($console, $($arg)*);
// Serial debug output
let mut sp = unsafe { $crate::debug::serial::SerialPort::init() };
let _ = writeln!(
sp,
"{}[{:>5}]\x1b[0m {:<8} | {}",
$level.serial_color_code(),
"LOG",
$module,
sp,
"{}[{:>5}]\x1b[0m {:<8} | {}",
$level.serial_color_code(),
"LOG",
$module,
format_args!($($arg)*)
);
}};

12
kernel/src/events.rs
View File

@@ -1,14 +1,10 @@
use core::sync::atomic::{AtomicU64, AtomicUsize, Ordering};
const QUEUE_SIZE: usize = 1024; // Должно быть степенью двойки для быстрой битовой маски
const QUEUE_SIZE: usize = 1024;
const QUEUE_MASK: usize = QUEUE_SIZE - 1;
/// Lock-free MPSC (Multi-Producer, Single-Consumer) очередь.
/// Оптимизирована для передачи токенов инвалидации без блокировок.
pub struct RevocationQueue {
buffer: [AtomicU64; QUEUE_SIZE],
// Используем паддинг (cache line size = 64 bytes) для предотвращения False Sharing
// между head (изменяется VMM) и tail (изменяется Cap-системой).
#[doc(hidden)]
_pad0: [u8; 64],
head: AtomicUsize,
@@ -29,15 +25,12 @@ impl RevocationQueue {
}
}
/// Вызывается со стороны Actor'ов и подсистемы Capabilities (Multi-Producer)
pub fn push(&self, token_sig: u64) -> Result<(), &'static str> {
let mut tail = self.tail.load(Ordering::Relaxed);
loop {
let head = self.head.load(Ordering::Acquire);
if tail.wrapping_sub(head) >= QUEUE_SIZE {
// Очередь переполнена. В проде здесь должен быть триггер ballooning'а
// или принудительный yield для VMM, но пока возвращаем ошибку.
return Err("Revocation queue overflow");
}
@@ -56,13 +49,12 @@ impl RevocationQueue {
}
}
/// Вызывается только из активного VMM контекста (Single-Consumer)
pub fn pop(&self) -> Option<u64> {
let head = self.head.load(Ordering::Relaxed);
let tail = self.tail.load(Ordering::Acquire);
if head == tail {
return None; // Очередь пуста
return None;
}
let token = self.buffer[head & QUEUE_MASK].load(Ordering::Acquire);

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kernel/src/font.psf Normal file
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13
kernel/src/main.rs
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@@ -18,8 +18,12 @@ use crate::mem::pm_manages::{PMActor, PMRequest, PMResult};
pub mod cap;
pub mod cpu;
pub mod events;
pub mod tty;
mod mem;
static KERNEL_FONT: &[u8] = include_bytes!("font.psf");
#[macro_use]
pub mod debug;
@@ -164,6 +168,7 @@ static _END_MARKER: RequestsEndMarker = RequestsEndMarker::new();
#[unsafe(no_mangle)]
unsafe extern "C" fn kmain() -> ! {
assert!(BASE_REVISION.is_supported());
let fb_res = FRAMEBUFFER_REQUEST.get_response().expect("Limine: No Framebuffer");
@@ -173,7 +178,8 @@ unsafe extern "C" fn kmain() -> ! {
let hhdm_offset = hhdm_res.offset();
let fb = fb_res.framebuffers().next().expect("Limine: No active framebuffer found");
let mut console = Console::new(FramebufferDisplay { framebuffer: &fb });
let mut console = tty::Console::new(&fb, KERNEL_FONT);
console.clear();
info!(console, "BOOT", "LISA Kernel Starting...");
@@ -224,7 +230,7 @@ unsafe extern "C" fn kmain() -> ! {
unsafe { core::arch::asm!("sti", options(nomem, nostack, preserves_flags)); }
// --- Тестирование подсистемы Capability ---
// Capability test
let root_cnode = cap::CNode::new(256);
if let Some(frame) = mem::pmm::alloc_frame() {
@@ -252,7 +258,7 @@ unsafe extern "C" fn kmain() -> ! {
}
}
// --- Тестирование PMActor (Lock-Free Очереди) ---
// PMActor test
info!(console, "PM", "--- PMActor Buddy Test ---");
let actor_base_phys = PhysAddr(0x4000_0000);
@@ -323,7 +329,6 @@ unsafe extern "C" fn kmain() -> ! {
// --- Логотип ---
let logo = r#"
###########
##################

8
kernel/src/mem/allocator.rs
View File

@@ -25,7 +25,7 @@ impl<A> Locked<A> {
pub fn lock(&self) -> LockedGuard<'_, A> {
while self.lock.compare_exchange_weak(false, true, Ordering::Acquire, Ordering::Relaxed).is_err() {
core::hint::spin_loop(); // Уступка в spinlock для снижения нагрузки на шину
core::hint::spin_loop();
}
LockedGuard {
lock: &self.lock,
@@ -49,14 +49,12 @@ impl<A> DerefMut for LockedGuard<'_, A> {
fn deref_mut(&mut self) -> &mut Self::Target { self.data }
}
/// Узел односвязного списка свободных блоков
struct ListNode {
next: Option<&'static mut ListNode>,
}
const BLOCK_SIZES: &[usize] = &[8, 16, 32, 64, 128, 256, 512, 1024, 2048];
/// Slab аллокатор для гранулярного выделения памяти
pub struct SlabAllocator {
list_heads: [Option<&'static mut ListNode>; BLOCK_SIZES.len()],
heap_start: usize,
@@ -80,13 +78,11 @@ impl SlabAllocator {
self.heap_end = start + size;
}
/// Поиск индекса блока под требуемый размер
fn list_index(layout: &Layout) -> Option<usize> {
let required_block_size = layout.size().max(layout.align());
BLOCK_SIZES.iter().position(|&s| s >= required_block_size)
}
/// Резервный Bump-аллокатор для нарезки новых Slab-блоков
fn fallback_alloc(&mut self, layout: Layout) -> *mut u8 {
let alloc_start = (self.next_bump + layout.align() - 1) & !(layout.align() - 1);
let alloc_end = alloc_start.checked_add(layout.size()).unwrap_or(self.heap_end + 1);
@@ -143,8 +139,6 @@ unsafe impl GlobalAlloc for Locked<SlabAllocator> {
}
}
None => {
// Крупные регионы освобождаются через вызовы дескрипторов VMM/PMM,
// глобальный аллокатор ядра их не трекает.
}
}
}

20
kernel/src/mem/buddy.rs
View File

@@ -37,15 +37,12 @@
extern crate alloc;
use alloc::vec::Vec;
// ══════════════════════════════════════════════════════════════════════════════
// Constants & helpers
// ══════════════════════════════════════════════════════════════════════════════
/// Maximum allocation order.
/// `2^11 × 4 096 bytes = 8 MiB` per single allocation.
pub const MAX_ORDER: usize = 11;
/// ⌈log₂(n)⌉ — the minimum order whose block size covers `page_count` pages.
/// ⌈log2(n)⌉ — the minimum order whose block size covers `page_count` pages.
///
/// ```text
/// order_for(1) = 0 (2^0 = 1)
@@ -63,10 +60,7 @@ pub fn order_for(page_count: usize) -> usize {
}
}
// ══════════════════════════════════════════════════════════════════════════════
// BuddyAllocator
// ══════════════════════════════════════════════════════════════════════════════
/// Buddy allocator over a contiguous, pre-committed range of physical pages.
///
/// All page indices stored in free lists are **relative to the start of the
@@ -89,8 +83,7 @@ pub struct BuddyAllocator {
}
impl BuddyAllocator {
// ─── Construction ─────────────────────────────────────────────────────────
//Construction
/// Create a new allocator over `total_pages` pages, **all initially free**.
///
/// Uses a greedy largest-first decomposition to build the initial free lists
@@ -127,7 +120,7 @@ impl BuddyAllocator {
// Size constraint: 2^order ≤ remaining → order ≤ ⌊log₂(remaining)⌋.
let size_order = (usize::BITS as usize - 1)
- remaining.leading_zeros() as usize; // ⌊log₂(remaining)⌋
- remaining.leading_zeros() as usize; // ⌊log2(remaining)⌋
let order = MAX_ORDER.min(align_order).min(size_order);
let block_size = 1usize << order;
@@ -140,8 +133,7 @@ impl BuddyAllocator {
this
}
// ─── Allocation ───────────────────────────────────────────────────────────
//Allocation
/// Allocate a 2^`order`-page block.
///
/// Returns the **relative** page index of the block's first page, or `None`
@@ -206,7 +198,7 @@ impl BuddyAllocator {
self.alloc(order).map(|idx| (idx, order))
}
// ─── Deallocation ─────────────────────────────────────────────────────────
//Deallocation
/// Return a 2^`order`-page block at **relative** index `block_idx` to the
/// free pool, coalescing with free buddies up the order chain.
@@ -269,7 +261,7 @@ impl BuddyAllocator {
self.free_lists[order].push(block_idx);
}
// ─── Introspection ────────────────────────────────────────────────────────
//Introspection
/// Number of pages currently available for allocation.
#[inline]

10
kernel/src/mem/paging.rs
View File

@@ -29,7 +29,7 @@ pub struct PageTable {
}
impl PageTable {
// ── Bulk mapping ─────────────────────────────────────────────────────────
//Bulk mapping
/// Map a contiguous physical range to a contiguous virtual range.
/// Allocates intermediate page-table pages from the PMM as needed.
@@ -48,7 +48,7 @@ impl PageTable {
}
}
// ── Single-page operations ────────────────────────────────────────────────
//Single-page operations
/// Map a single 4 KiB page.
/// Allocates intermediate PT pages from the PMM if they do not exist.
@@ -134,7 +134,7 @@ impl PageTable {
Some(PhysAddr((p1e & PTE_ADDR_MASK) | (virt.0 & 0xFFF)))
}
// ── CR3 ──────────────────────────────────────────────────────────────────
// CR3
/// Load this page table into CR3 (full TLB flush, no PCID).
///
@@ -151,7 +151,7 @@ impl PageTable {
}
}
// ── Private walk helpers ──────────────────────────────────────────────────────
//Private walk helpers
impl PageTable {
/// Walk (or create) the path P4 → P3 → P2 → P1, returning a mutable
@@ -201,7 +201,7 @@ impl PageTable {
}
}
// ── PMM shim ─────────────────────────────────────────────────────────────────
//PMM shim
/// Allocate a single physical frame for page-table use.
/// This thin wrapper avoids a direct dependency cycle between paging ↔ pmm.

25
kernel/src/mem/pm_manages.rs
View File

@@ -49,9 +49,7 @@ use crate::mem::pmm::PAGE_SIZE;
extern crate alloc;
// ══════════════════════════════════════════════════════════════════════════════
// Message packing constants
// ══════════════════════════════════════════════════════════════════════════════
const QUEUE_SIZE: usize = 1024; // power-of-two
const QUEUE_MASK: usize = QUEUE_SIZE - 1;
@@ -67,10 +65,7 @@ mod packing {
pub const ARG_MASK: u64 = 0x000F_FFFF; // 20 bits
}
// ══════════════════════════════════════════════════════════════════════════════
// Request type
// ══════════════════════════════════════════════════════════════════════════════
/// Asynchronous request submitted to a `PMActor` inbox.
///
/// `channel_id` identifies where the response should be routed.
@@ -163,9 +158,7 @@ impl PMRequest {
}
}
// ══════════════════════════════════════════════════════════════════════════════
// Response type
// ══════════════════════════════════════════════════════════════════════════════
/// Result returned by `PMActor::process_messages()` for each completed request.
#[derive(Debug, Clone, Copy)]
@@ -194,10 +187,7 @@ pub enum PMResult {
Freed { pages_returned: usize },
}
// ══════════════════════════════════════════════════════════════════════════════
// Lock-free MPSC inbox
// ══════════════════════════════════════════════════════════════════════════════
/// MPSC ring buffer for PMRequest values.
///
/// Producers (any core, any context) call `send`; the owning PMActor calls
@@ -268,10 +258,7 @@ impl PMActorQueue {
}
}
// ══════════════════════════════════════════════════════════════════════════════
// PM Actor
// ══════════════════════════════════════════════════════════════════════════════
/// An autonomous physical-memory actor.
///
/// Owns a `BuddyAllocator` over its capital range and a lock-free MPSC inbox.
@@ -284,16 +271,12 @@ impl PMActorQueue {
pub struct PMActor {
/// Unique identity within the actor federation.
pub actor_id: u64,
/// Root strong capability over the entire managed physical range.
pub root_untyped: Capability,
/// `(inclusive_start, exclusive_end)` physical addresses.
pub managed_range: (PhysAddr, PhysAddr),
/// Inbox — producers write here, actor reads here.
queue: PMActorQueue,
/// Local buddy allocator. Only ever touched in `process_messages`.
buddy: BuddyAllocator,
}
@@ -319,7 +302,7 @@ impl PMActor {
}
}
// ─── Producer API (callable from any context) ──────────────────────────
//Producer API (callable from any context)
/// Submit a request to this actor's inbox.
///
@@ -329,7 +312,7 @@ impl PMActor {
self.queue.send(req)
}
// ─── Consumer API (actor's own scheduled context) ─────────────────────
//Consumer API (actor's own scheduled context)
/// Drain the inbox and execute all pending requests.
///
@@ -370,7 +353,7 @@ impl PMActor {
responses
}
// ─── Introspection ────────────────────────────────────────────────────
//Introspection
/// Free pages remaining in this actor's buddy pool.
#[inline]
@@ -385,7 +368,7 @@ impl PMActor {
}
}
// ── Private handler implementations ──────────────────────────────────────────
//Private handler implementations
impl PMActor {
fn handle_allocate(

4
kernel/src/mem/pmm.rs
View File

@@ -71,7 +71,7 @@ impl BitmapPMM {
*PMM.lock() = Some(pmm);
}
// ── Core operations ───────────────────────────────────────────────────────
//Core operations
/// Mark a frame as free. Idempotent (double-free is a no-op, not UB).
pub fn free_frame(&mut self, phys_addr: PhysAddr) {
@@ -175,7 +175,7 @@ impl BitmapPMM {
}
}
// ── Module-level convenience functions ───────────────────────────────────────
//Module-level convenience functions
pub fn alloc_frame() -> Option<PhysAddr> {
PMM.lock().as_mut()?.alloc_frame()

41
kernel/src/mem/vmm.rs
View File

@@ -37,10 +37,7 @@ use crate::events::MMU_REVOCATION_QUEUE;
extern crate alloc;
// ══════════════════════════════════════════════════════════════════════════════
// Error type
// ══════════════════════════════════════════════════════════════════════════════
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum VmError {
/// PMM returned `None` — no physical frames available.
@@ -80,9 +77,7 @@ impl core::fmt::Display for VmError {
}
}
// ══════════════════════════════════════════════════════════════════════════════
// VMA flags
// ══════════════════════════════════════════════════════════════════════════════
bitflags::bitflags! {
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -113,9 +108,7 @@ impl VmaFlags {
}
}
// ══════════════════════════════════════════════════════════════════════════════
// VMA backing
// ══════════════════════════════════════════════════════════════════════════════
#[derive(Debug)]
pub enum VmaBacking {
@@ -159,9 +152,7 @@ impl VmaBacking {
}
}
// ══════════════════════════════════════════════════════════════════════════════
// VMA region
// ══════════════════════════════════════════════════════════════════════════════
#[derive(Debug)]
pub struct VmaRegion {
@@ -180,9 +171,7 @@ impl VmaRegion {
}
}
// ══════════════════════════════════════════════════════════════════════════════
// ASID / PCID allocator (bitmap-based, const-initializable, O(1) amortised)
// ══════════════════════════════════════════════════════════════════════════════
/// x86-64 PCIDs: 0 (kernel, no PCID tagging) and 4095 (reserved by spec).
/// Valid user ASIDs: 1 – 4094 inclusive.
@@ -262,9 +251,7 @@ fn free_asid(asid: u16) {
ASID_ALLOC.lock().free(asid);
}
// ══════════════════════════════════════════════════════════════════════════════
// CPU feature detection (call once during boot, before first activate())
// ══════════════════════════════════════════════════════════════════════════════
/// Set to `true` at boot if CPUID.07H:EBX[10] = 1 (INVPCID supported).
static INVPCID_SUPPORTED: AtomicBool = AtomicBool::new(false);
@@ -302,9 +289,7 @@ pub fn init_cpu_features() {
INVPCID_SUPPORTED.store(supported, Ordering::Relaxed);
}
// ══════════════════════════════════════════════════════════════════════════════
// Address space
// ══════════════════════════════════════════════════════════════════════════════
pub struct AddressSpace {
/// Hardware PCID written to CR3 bits 11:0.
@@ -317,8 +302,6 @@ pub struct AddressSpace {
hhdm: u64,
}
// ── Private helpers ───────────────────────────────────────────────────────────
impl AddressSpace {
#[inline]
unsafe fn pml4_raw(&self) -> *mut PageTable {
@@ -392,11 +375,7 @@ impl AddressSpace {
}
}
// ── Public API ────────────────────────────────────────────────────────────────
impl AddressSpace {
// ─── Construction ──────────────────────────────────────────────────────
/// Allocate a fresh, empty address space with a zeroed PML4.
pub fn new(hhdm: u64) -> Result<Self, VmError> {
let pml4_phys = pmm::alloc_frame().ok_or(VmError::OutOfMemory)?;
@@ -480,8 +459,6 @@ impl AddressSpace {
Ok(virt)
}
// ─── Zero-copy shared mapping (new) ───────────────────────────────────
/// Map `page_count` pages of physical memory owned by `owner_cap` into
/// this address space at `virt`.
///
@@ -533,8 +510,6 @@ impl AddressSpace {
Ok(virt)
}
// ─── Demand paging ─────────────────────────────────────────────────────
/// Handle a hardware page fault at `fault_addr`.
///
/// Returns `Ok(())` if the fault was a valid lazy demand-page (caller should
@@ -579,8 +554,6 @@ impl AddressSpace {
Ok(())
}
// ─── Unmapping ─────────────────────────────────────────────────────────
/// Unmap the VMA containing `virt`, free its frames (if owned), flush TLB.
pub fn unmap_region(&mut self, virt: VirtAddr) -> Result<(), VmError> {
let idx = self.find_idx(virt).ok_or(VmError::RegionNotFound)?;
@@ -591,8 +564,6 @@ impl AddressSpace {
Ok(())
}
// ─── Capability revocation ─────────────────────────────────────────────
/// Atomically unmap all VMAs associated with `cap_token` (skip PINNED).
///
/// Hardware access is terminated before this function returns.
@@ -618,14 +589,14 @@ impl AddressSpace {
tlb_flush_asid(self.asid);
}
// ─── Address translation ───────────────────────────────────────────────
//Address translation
/// Walk the live page table to translate `virt` → physical address.
pub fn translate(&self, virt: VirtAddr) -> Option<PhysAddr> {
unsafe { (*self.pml4_raw()).translate(virt, self.hhdm) }
}
// ─── Activation ────────────────────────────────────────────────────────
//Activation
/// Load this address space into the CPU (context switch).
///
@@ -646,8 +617,6 @@ impl AddressSpace {
}
}
// ─── Introspection ─────────────────────────────────────────────────────
#[inline] pub fn regions(&self) -> &[VmaRegion] { &self.regions }
#[inline] pub fn region_count(&self) -> usize { self.regions.len() }
@@ -670,10 +639,7 @@ impl Drop for AddressSpace {
}
}
// ══════════════════════════════════════════════════════════════════════════════
// TLB management
// ══════════════════════════════════════════════════════════════════════════════
/// Flush all TLB entries tagged with `asid` (PCID) on the current core.
///
/// Uses `INVPCID` type-1 (single-context flush) when available (Broadwell+,
@@ -714,10 +680,7 @@ pub fn tlb_flush_all() {
}
}
// ══════════════════════════════════════════════════════════════════════════════
// Global kernel address space
// ══════════════════════════════════════════════════════════════════════════════
/// The one kernel address space. Initialised once during boot.
pub static KERNEL_SPACE: Locked<Option<AddressSpace>> = Locked::new(None);

133
kernel/src/tty.rs Normal file
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@@ -0,0 +1,133 @@
use core::fmt;
use limine::framebuffer::Framebuffer;
#[derive(Debug)]
#[repr(C, packed)]
struct Psf2Header {
magic: u32,
version: u32,
header_size: u32,
flags: u32,
num_glyphs: u32,
bytes_per_glyph: u32,
height: u32,
width: u32,
}
pub struct Console<'a> {
framebuffer: &'a Framebuffer<'a>,
font: &'static [u8],
pub x: usize,
pub y: usize,
pub fg_color: u32,
pub bg_color: u32,
}
impl<'a> Console<'a> {
pub fn new(framebuffer: &'a Framebuffer<'a>, font: &'static [u8]) -> Self {
Self {
framebuffer,
font,
x: 0,
y: 0,
fg_color: 0xFFFFFF, // White
bg_color: 0x000000, // Black
}
}
pub fn set_color(&mut self, fg: u32) {
self.fg_color = fg;
}
pub fn clear(&mut self) {
let fb = self.framebuffer;
unsafe {
core::ptr::write_bytes(fb.addr(), 0, (fb.pitch() * fb.height()) as usize);
}
self.x = 0;
self.y = 0;
}
fn header(&self) -> &Psf2Header {
unsafe { &*(self.font.as_ptr() as *const Psf2Header) }
}
fn scroll(&mut self) {
let header = self.header();
let font_height = header.height as usize;
let fb = self.framebuffer;
let pitch = fb.pitch() as usize;
let height = fb.height() as usize;
let shift = font_height * pitch;
let size = pitch * (height - font_height);
unsafe {
let addr = fb.addr();
core::ptr::copy(addr.add(shift), addr, size);
core::ptr::write_bytes(addr.add(size), 0, shift);
}
self.y -= font_height;
}
fn draw_glyph(&mut self, glyph_index: u32, x: usize, y: usize) {
let header = self.header();
let bytes_per_line = (header.width + 7) / 8;
let glyph_offset = header.header_size + (glyph_index * header.bytes_per_glyph);
let fb = self.framebuffer;
let fb_pitch = fb.pitch() as usize;
let fb_addr = fb.addr();
for cy in 0..header.height {
let glyph_row = self.font[(glyph_offset + cy * bytes_per_line) as usize];
for cx in 0..header.width {
if (glyph_row & (0x80 >> cx)) != 0 {
let offset = ((y + cy as usize) * fb_pitch) + ((x + cx as usize) * 4);
unsafe {
fb_addr.add(offset).cast::<u32>().write_volatile(self.fg_color);
}
}
}
}
}
pub fn write_char(&mut self, c: char) {
let (font_width, font_height, num_glyphs) = {
let h = self.header();
(h.width as usize, h.height as usize, h.num_glyphs)
};
if c == '\n' {
self.x = 0;
self.y += font_height;
} else {
if self.x + font_width > self.framebuffer.width() as usize {
self.x = 0;
self.y += font_height;
}
let glyph_index = if (c as u32) < num_glyphs {
c as u32
} else {
0 // symbol placeholder
};
self.draw_glyph(glyph_index, self.x, self.y);
self.x += font_width;
}
if self.y + font_height > self.framebuffer.height() as usize {
self.scroll();
}
}
}
impl fmt::Write for Console<'_> {
fn write_str(&mut self, s: &str) -> fmt::Result {
for c in s.chars() {
self.write_char(c);
}
Ok(())
}
}