/dev/ioports works like /dev/port, but supports 16-bit and 32-bit ports. Signed-off-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx> --- Wasn't sure whether I should update the "Modified" notice at the top; ideally such things should go away in favor of git. man4/ioports.4 | 1 + man4/mem.4 | 21 +++++++++++++++++++-- 2 files changed, 20 insertions(+), 2 deletions(-) create mode 100644 man4/ioports.4 diff --git a/man4/ioports.4 b/man4/ioports.4 new file mode 100644 index 0000000..d4c1762 --- /dev/null +++ b/man4/ioports.4 @@ -0,0 +1 @@ +.so man4/mem.4 diff --git a/man4/mem.4 b/man4/mem.4 index 74b7b89..adfd810 100644 --- a/man4/mem.4 +++ b/man4/mem.4 @@ -25,7 +25,7 @@ .\" Modified Sat Jul 24 16:59:10 1993 by Rik Faith (faith@xxxxxxxxxx) .TH MEM 4 1992-11-21 "Linux" "Linux Programmer's Manual" .SH NAME -mem, kmem, port \- system memory, kernel memory and system ports +mem, kmem, port, ioports \- system memory, kernel memory and system ports .SH DESCRIPTION .B mem is a character device file @@ -66,7 +66,8 @@ chown root:kmem /dev/kmem .B port is similar to .BR mem , -but the I/O ports are accessed. +but the I/O ports are accessed. Multi-byte reads or writes to port will +operate on successive byte-sized ports. .LP It is typically created by: .RS @@ -75,12 +76,28 @@ mknod \-m 660 /dev/port c 1 4 .br chown root:mem /dev/port .RE +.LP +.B ioports +is similar to +.BR port , +but supports reads and writes of 16-bit or 32-bit ports. Reads or writes to +ioport with sizes other than 1, 2, or 4 will return EINVAL. +.LP +It is typically created by: +.RS +.sp +mknod \-m 660 /dev/ioports c 1 12 +.br +chown root:mem /dev/ioports +.RE .SH FILES .I /dev/mem .br .I /dev/kmem .br .I /dev/port +.br +.I /dev/ioports .SH SEE ALSO .BR chown (1), .BR mknod (1), -- 2.0.0.rc2 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
