forked from AbleOS/ableos
68 lines
1.3 KiB
Rust
68 lines
1.3 KiB
Rust
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use core::ptr;
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// mod panic;
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pub mod drivers;
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pub mod init;
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pub mod serial;
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use crate::arch::drivers::nrf52::{Level, Pins};
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use core::ptr::write_volatile;
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global_asm!(include_str!("boot.s"));
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fn delay(ticks: usize) {
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static mut DUMMY: usize = 0;
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// Reduce the number of iterations when in debug mode
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#[cfg(debug_assertions)]
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let ticks = ticks / 128;
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for t in 0..ticks {
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// Prevent the optimizer from removing this loop
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unsafe {
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write_volatile(&mut DUMMY, t);
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}
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}
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}
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use crate::print;
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#[no_mangle]
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pub extern "C" fn not_main() {
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const UART0: *mut u8 = 0x0900_0000 as *mut u8;
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for byte in b"ableOS Arm 64" {
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unsafe {
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ptr::write_volatile(UART0, *byte);
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}
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}
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let gpios = Pins::take();
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let mut led = gpios.p0_31;
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loop {
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led.set_high();
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delay(2_000_000);
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led.set_low();
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delay(6_000_000);
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}
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led.set_push_pull_output(Level::Low);
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crate::kmain::kernel_main();
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sloop();
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}
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pub fn sloop() -> ! {
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loop {}
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}
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pub fn print() {
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for byte in b"ableOS Arm 64" {
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const UART0: *mut u8 = 0x0900_0000 as *mut u8;
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unsafe {
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ptr::write_volatile(UART0, *byte);
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}
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}
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}
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pub fn shutdown() {}
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