GKaszewski/k-os
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refactor: unsafe only in adapter + libkos; forbid(unsafe_code) everywhere else; libkos Window (volatile, bounds-checked MMIO/DMA/shared mem), entry!, thread::spawn; MapRegion returns pages; kernel const-built (with_cores/install_platform); newtype addrs

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This commit is contained in:
Gabriel Kaszewski
2026-10-27 21:43:24 +01:00
parent 83809bbe94
commit 842d14987c
107 changed files with 771 additions and 647 deletions
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20
crates/init/src/devices.rs
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@@ -7,12 +7,13 @@ use hw_virtio::mmio::{
use libkos::device::{self, Device};
use libkos::syscall;
use types::badge::Badge;
use types::bootinfo::{BOOT_INFO_VA, BootInfo, KIND_UART_16550, KIND_VIRTIO, NO_SLOT};
use types::address::VirtualAddress;
use types::bootinfo::{BootInfo, KIND_UART_16550, KIND_VIRTIO, NO_SLOT};
use types::bounded::CapSlot;
use types::permission::{Permission, PermissionSet};
/// Where init briefly maps a device to ask what it is (top of the window).
const PROBE_VA: usize = 0x01F0_0000;
const PROBE_VA: VirtualAddress = VirtualAddress::from_raw(0x01F0_0000);
pub struct Devices {
pub disk: Device,
@@ -36,10 +37,10 @@ fn virtio_id(region: CapSlot) -> u32 {
return 0;
};
let id = match device::map_mmio(copy, PROBE_VA) {
// SAFETY: PROBE_VA maps the device's registers until the drop below.
Ok(()) => unsafe {
let reg = |off: usize| core::ptr::read_volatile((PROBE_VA + off) as *const u32);
if reg(REG_MAGIC) == MAGIC { reg(REG_DEVICE_ID) } else { 0 }
// The registers stay mapped until the drop below.
Ok(regs) => match regs.read::<u32>(REG_MAGIC) == MAGIC {
true => regs.read(REG_DEVICE_ID),
false => 0,
},
Err(_) => 0,
};
@@ -47,10 +48,9 @@ fn virtio_id(region: CapSlot) -> u32 {
id
}
fn boot_info() -> &'static BootInfo {
// SAFETY: boot maps the BootInfo page read-only at BOOT_INFO_VA before
// init runs; readers check its magic.
unsafe { &*(BOOT_INFO_VA as *const BootInfo) }
/// What boot left for init; readers check its magic.
fn boot_info() -> BootInfo {
libkos::boot_info()
}
/// The capability that halts the machine, if boot said where it is.