Lines Matching refs:IO
682 \subsection{IO}
683 An IO capability gives the holder the ability to read and write to IO ports.
684 IO capabilities are currently only supported on x86-64.
687 \item[Origin] A single IO capability covering the whole IO region created at
707 datatype io_cap "IO capability" {
708 start 16 "Start of the granted IO range";
709 end 16 "End of the granted IO range";
715 \arg IO port number
718 This invocation writes a byte to the the specified IO port
721 \arg IO port number
724 This invocation writes a two byte word to the the specified IO port
727 \arg IO port number
730 This invocation writes a four byte to the the specified IO port
733 \arg IO port number
735 This invocation returns a byte read from the specified IO port.
738 \arg IO port number
740 This invocation returns a 16-bit word read from the specified IO port.
743 \arg IO port number
745 This invocation returns a 32-bit doubleword read from the specified IO port.