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// x86 port i/o
//
// these are pretty important cause all drivers which rely
// on serial rely on these 2 instructions so
pub inline fn outb(port: u16, val: u8) void {
asm volatile ("outb %[val], %[port]"
:
: [val] "{al}" (val),
[port] "N{dx}" (port),
);
}
pub inline fn inb(port: u16) u8 {
return asm volatile ("inb %[port], %[result]"
: [result] "={al}" (-> u8),
: [port] "N{dx}" (port),
);
}
pub inline fn outw(port: u16, val: u16) void {
asm volatile ("outw %[val], %[port]"
:
: [val] "{ax}" (val),
[port] "N{dx}" (port),
);
}
pub inline fn inw(port: u16) u16 {
return asm volatile ("inw %[port], %[result]"
: [result] "={ax}" (-> u16),
: [port] "N{dx}" (port),
);
}
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