GKaszewski/k-os
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feat: SMP stage 1 (4 harts, per-hart guarded stacks, home-core affinity, IPIs, TLB shootdown, one temporary kernel lock), 4-core storm

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This commit is contained in:
Gabriel Kaszewski
2026-10-27 00:56:15 +01:00
parent b87a62475f
commit 2e665fd66e
22 changed files with 995 additions and 230 deletions
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14
crates/adapter-riscv/src/boot/hardware.rs
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@@ -8,12 +8,21 @@ unsafe extern "C" {
static _heap_start: u8;
}
pub fn init(uart: &Uart) -> &'static mut mmu::PageTable {
pub fn init(uart: &Uart, boot_hart: usize) -> &'static mut mmu::PageTable {
zero_bss();
let heap_start = unsafe { &_heap_start as *const u8 as usize };
mmu::init_allocator(heap_start);
let kernel_pt = mmu::init_kernel_page_table();
let harts = crate::smp::probe_harts();
if boot_hart >= harts {
crate::halt(uart, "boot hart outside the hart range");
}
crate::smp::init(
boot_hart,
harts,
mmu::virt_to_phys(kernel_pt as *const mmu::PageTable as usize),
);
mmu::activate(kernel_pt);
uart.write_str("k-os: MMU enabled (Sv39)\n");
match mmu::check_wx(kernel_pt) {
@@ -46,7 +55,8 @@ pub fn init(uart: &Uart) -> &'static mut mmu::PageTable {
if board::USER_POOL_PAGES > domain::memory::frame::MAX_FRAMES {
crate::halt(uart, "user pool larger than the frame table");
}
let riscv_platform = platform::RiscVPlatform::new(kernel_pt as *const mmu::PageTable as usize);
let riscv_platform =
platform::RiscVPlatform::new(kernel_pt as *const mmu::PageTable as usize, harts as u8);
// SAFETY: `init_in_place` writes every field of the kernel.
unsafe {
KERNEL.init_with(|slot| {