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//! I/O Port Operations
pub inline fn out_byte(port: u16, value: u8) void {
asm volatile ("outb %[value], %[port]"
:
: [value] "{al}" (value),
[port] "N{dx}" (port),
);
}
pub inline fn in_byte(port: u16) u8 {
return asm volatile ("inb %[port], %[result]"
: [result] "={al}" (-> u8),
: [port] "N{dx}" (port),
);
}
pub inline fn out_word(port: u16, value: u16) void {
asm volatile ("outw %[value], %[port]"
:
: [value] "{ax}" (value),
[port] "N{dx}" (port),
);
}
pub inline fn in_word(port: u16) u16 {
return asm volatile ("inw %[port], %[result]"
: [result] "={ax}" (-> u16),
: [port] "N{dx}" (port),
);
}
pub inline fn out_long(port: u16, value: u32) void {
asm volatile ("outl %[value], %[port]"
:
: [value] "{eax}" (value),
[port] "N{dx}" (port),
);
}
pub inline fn in_long(port: u16) u32 {
return asm volatile ("inl %[port], %[result]"
: [result] "={eax}" (-> u32),
: [port] "N{dx}" (port),
);
}
|
