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feat: implement MMU core functionality

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* feat: Implement a basic MMU configuration

* feat: Enhance MMU by separating sections and configuring permissions

* feat: Update MMU configuration and memory allocation functions

* fix: Level 3 translation fault

* docs: add code documentation

* fix: linter

* feat: map translation tables to kernel space

* feat: move el1 stack to kernel VA space

* feat: use virtual memory for heap allocation

* docs: update Readme
This commit is contained in:
Alexander Neuhäuser
2026-03-17 19:30:45 +01:00
committed by GitHub
parent 55f410e2bb
commit f78388ee2c
23 changed files with 992 additions and 264 deletions
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26
src/lib.rs
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@@ -12,30 +12,36 @@ use core::{
use heap::Heap;
use crate::{interrupt_handlers::initialize_interrupt_handler, logger::DefaultLogger};
use crate::{
aarch64::mmu::{
allocate_memory, KERNEL_VIRTUAL_MEM_SPACE, LEVEL2_BLOCK_SIZE, NORMAL_MEM, UXN, WRITABLE,
},
interrupt_handlers::initialize_interrupt_handler,
logger::DefaultLogger,
};
static PERIPHERAL_BASE: u32 = 0x3F00_0000;
static PERIPHERAL_BASE: usize = 0x3F00_0000;
unsafe extern "C" {
unsafe static mut __heap_start: u8;
unsafe static mut __heap_end: u8;
unsafe static mut __kernel_end: u8;
}
#[global_allocator]
pub static mut GLOBAL_ALLOCATOR: Heap = Heap::empty();
pub unsafe fn init_heap() {
let start = core::ptr::addr_of_mut!(__heap_start) as usize;
let end = core::ptr::addr_of_mut!(__heap_end) as usize;
pub unsafe fn init_kernel_heap() {
let start = core::ptr::addr_of_mut!(__kernel_end) as usize | KERNEL_VIRTUAL_MEM_SPACE;
let size = LEVEL2_BLOCK_SIZE * 2;
allocate_memory(start, size, NORMAL_MEM | UXN | WRITABLE).unwrap();
let heap = core::ptr::addr_of_mut!(GLOBAL_ALLOCATOR);
(*heap).init(start, end);
(*heap).init(start, start + size);
}
#[panic_handler]
fn panic(_panic: &PanicInfo) -> ! {
loop {
println!("Panic");
println!("Panic: {}", _panic.message());
}
}
@@ -46,7 +52,6 @@ pub mod configuration;
pub mod framebuffer;
pub mod interrupt_handlers;
pub mod logger;
pub mod timer;
pub mod pi3;
@@ -73,6 +78,7 @@ pub fn get_current_el() -> u64 {
}
pub fn initialize_kernel() {
unsafe { init_kernel_heap() };
logger::set_logger(Box::new(DefaultLogger));
initialize_interrupt_handler();
}