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feat(adapter-riscv): add Sv39 page tables with identity mapping and MMU activation

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This commit is contained in:
Gabriel Kaszewski
2026-10-18 01:48:00 +02:00
parent 44a0ead7f2
commit d9de828420
2 changed files with 177 additions and 0 deletions
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8
crates/adapter-riscv/src/main.rs
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@@ -1,6 +1,7 @@
#![no_std]
#![no_main]
mod page_table;
mod uart;
use core::arch::global_asm;
@@ -22,6 +23,7 @@ spin:
unsafe extern "C" {
static _bss_start: u8;
static _bss_end: u8;
static _heap_start: u8;
}
fn zero_bss() {
@@ -40,6 +42,12 @@ extern "C" fn kmain() -> ! {
let uart = Uart::new();
uart.write_str("k-os: booted on RISC-V\n");
let heap_start = unsafe { &_heap_start as *const u8 as usize };
page_table::init_page_allocator(heap_start);
let kernel_pt = page_table::init_kernel_page_table();
page_table::activate(kernel_pt);
uart.write_str("k-os: MMU enabled (Sv39)\n");
loop {
unsafe { core::arch::asm!("wfi") };
}