jD91mZM2
53 lines
1.3 KiB
Rust
53 lines
1.3 KiB
Rust
#[cfg(feature = "acpi")]
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use crate::acpi;
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use crate::syscall::io::{Io, Pio};
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#[no_mangle]
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pub unsafe extern fn kreset() -> ! {
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println!("kreset");
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// 8042 reset
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{
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println!("Reset with 8042");
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let mut port = Pio::<u8>::new(0x64);
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while port.readf(2) {}
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port.write(0xFE);
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}
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// Use triple fault to guarantee reset
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llvm_asm!("cli" : : : : "intel", "volatile");
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llvm_asm!("lidt cs:0" : : : : "intel", "volatile");
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llvm_asm!("int $$3" : : : : "intel", "volatile");
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unreachable!();
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}
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#[no_mangle]
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pub unsafe extern fn kstop() -> ! {
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println!("kstop");
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#[cfg(feature = "acpi")]
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acpi::set_global_s_state(5);
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// Magic shutdown code for bochs and qemu (older versions).
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for c in "Shutdown".bytes() {
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let port = 0x8900;
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println!("Shutdown with outb(0x{:X}, '{}')", port, c as char);
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Pio::<u8>::new(port).write(c);
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}
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// Magic shutdown using qemu default ACPI method
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{
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let port = 0x604;
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let data = 0x2000;
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println!("Shutdown with outb(0x{:X}, 0x{:X})", port, data);
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Pio::<u16>::new(port).write(data);
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}
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// Magic code for VMWare. Also a hard lock.
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println!("Shutdown with cli hlt");
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loop {
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llvm_asm!("cli; hlt" : : : : "intel", "volatile");
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}
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}
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