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author | Dennis Kobert <dennis@kobert.dev> | 2019-11-03 01:22:02 +0100 |
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committer | Dennis Kobert <dennis@kobert.dev> | 2019-11-03 01:22:02 +0100 |
commit | b47731c6fd99d80b1023d906dd4b3bb377e49438 (patch) | |
tree | 0777c9eef5c416b5e58e1c44ded42d7b53382c57 /kernel/src/io/serial.rs | |
parent | 41bff6a115b9625747f08651aa8209c6767254da (diff) |
Merge: 41bff6a a2d6311
Diffstat (limited to 'kernel/src/io/serial.rs')
-rw-r--r-- | kernel/src/io/serial.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/kernel/src/io/serial.rs b/kernel/src/io/serial.rs new file mode 100644 index 0000000..e1d4660 --- /dev/null +++ b/kernel/src/io/serial.rs @@ -0,0 +1,25 @@ +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +#[repr(u32)] +pub enum QemuExitCode { + Success = 0x10, // The actual exit code is (value << 1) | 1. + Failed = 0x11, +} + +pub fn exit_qemu(exit_code: QemuExitCode) { + use x86_64::instructions::port::Port; + + unsafe { + let mut port = Port::new(0xf4); + port.write(exit_code as u32); + } +} + +fn trivial_assertion() { + use crate::io::vga_text::OStream; + let mut stdout = OStream::new(); + stdout.clear(); + + stdout.print(b"trivial assertion... "); + assert_eq!(0, 1); + stdout.print(b"[ok]"); +} |