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61 lines
1.8 KiB
Rust
61 lines
1.8 KiB
Rust
5 years ago
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// SPDX-License-Identifier: MIT
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//
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// Copyright (c) 2018-2019 Andre Richter <andre.o.richter@gmail.com>
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// Rust embedded logo for `make doc`.
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#![doc(html_logo_url = "https://git.io/JeGIp")]
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//! The `kernel`
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//!
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//! The `kernel` is composed by glueing together hardware-specific Board Support
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//! Package (`BSP`) code and hardware-agnostic `kernel` code through the
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//! [`kernel::interface`] traits.
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//!
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//! [`kernel::interface`]: interface/index.html
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#![feature(format_args_nl)]
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#![feature(panic_info_message)]
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#![feature(trait_alias)]
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#![no_main]
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#![no_std]
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// This module conditionally includes the correct `BSP` which provides the
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// `_start()` function, the first function to run.
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mod bsp;
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// Afterwards, `BSP`'s early init code calls `runtime_init::init()` of this
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// module, which on completion, jumps to `kernel_entry()`.
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mod runtime_init;
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mod interface;
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mod print;
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/// Entrypoint of the `kernel`.
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fn kernel_entry() -> ! {
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use interface::console::Statistics;
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// Initialize the BSP's device drivers.
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for i in bsp::device_drivers().iter() {
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if let Err(()) = i.init() {
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// This message will only be readable if, at the time of failure,
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// the return value of `bsp::console()` is already in functioning
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// state.
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panic!("Error loading driver: {}", i.compatible())
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}
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}
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// If all drivers are loaded, UART is functional now and `println!()` calls
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// are transmitted on the physical wires.
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println!("[0] Hello from pure Rust!");
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println!("[1] Drivers probed:");
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for (i, driver) in bsp::device_drivers().iter().enumerate() {
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println!(" {}. {}", i + 1, driver.compatible());
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}
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println!("[2] Chars written: {}", bsp::console().chars_written());
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println!("[3] Stopping here.");
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bsp::wait_forever()
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}
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