xen 0.0.0-pre1

Idomatic Rust interfaces to Xen hypercall APIs
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/*
 * Copyright 2016-2017 Doug Goldstein <cardoe@cardoe.com>
 *
 * Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
 * http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
 * <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
 * option. This file may not be copied, modified, or distributed
 * except according to those terms.
 */

use xen_sys::hypercall::Hypercall;

#[derive(Debug)]
pub enum ConsoleIO {
    /// CONSOLEIO_write
    Write = 0,
}

/// writes to the system serial console which
/// is disabled for non-dom0 domains unless
/// Xen is built with CONFIG_VERBOSE
pub fn write(out: &[u8]) {
    unsafe {
        hypercall!(Hypercall::console_io,
                    ConsoleIO::Write as u64,
                    out.len() as u64,
                    out.as_ptr() as u64)
    };
}