pie-boot-loader-aarch64 0.1.25

Boot kernel code with mmu.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

use core::ptr::NonNull;

use fdt_parser::Fdt;

use crate::debug::setup_debugcon;

pub fn init_debugcon(fdt: *mut u8) -> Option<()> {
    fn phys_to_virt(p: usize) -> *mut u8 {
        p as _
    }
    let fdt = Fdt::from_ptr(NonNull::new(fdt)?).ok()?;
    let choson = fdt.chosen()?;
    let node = choson.debugcon()?;

    let uart = any_uart::Uart::new_by_fdt_node(&node, phys_to_virt)?;

    let reg = node.reg()?.next()?;

    setup_debugcon(reg.address as _, node.compatibles());

    super::set_uart(uart)?;

    Some(())
}