summaryrefslogtreecommitdiff
path: root/gpxe/src/core/console.c
diff options
context:
space:
mode:
Diffstat (limited to 'gpxe/src/core/console.c')
-rw-r--r--gpxe/src/core/console.c130
1 files changed, 0 insertions, 130 deletions
diff --git a/gpxe/src/core/console.c b/gpxe/src/core/console.c
deleted file mode 100644
index e22d2601..00000000
--- a/gpxe/src/core/console.c
+++ /dev/null
@@ -1,130 +0,0 @@
-#include "stddef.h"
-#include "console.h"
-#include <gpxe/process.h>
-#include <gpxe/nap.h>
-
-/** @file */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-/**
- * Write a single character to each console device.
- *
- * @v character Character to be written
- * @ret None -
- * @err None -
- *
- * The character is written out to all enabled console devices, using
- * each device's console_driver::putchar() method.
- *
- */
-void putchar ( int character ) {
- struct console_driver *console;
-
- /* Automatic LF -> CR,LF translation */
- if ( character == '\n' )
- putchar ( '\r' );
-
- for_each_table_entry ( console, CONSOLES ) {
- if ( ( ! console->disabled ) && console->putchar )
- console->putchar ( character );
- }
-}
-
-/**
- * Check to see if any input is available on any console.
- *
- * @v None -
- * @ret console Console device that has input available, if any.
- * @ret NULL No console device has input available.
- * @err None -
- *
- * All enabled console devices are checked once for available input
- * using each device's console_driver::iskey() method. The first
- * console device that has available input will be returned, if any.
- *
- */
-static struct console_driver * has_input ( void ) {
- struct console_driver *console;
-
- for_each_table_entry ( console, CONSOLES ) {
- if ( ( ! console->disabled ) && console->iskey ) {
- if ( console->iskey () )
- return console;
- }
- }
- return NULL;
-}
-
-/**
- * Read a single character from any console.
- *
- * @v None -
- * @ret character Character read from a console.
- * @err None -
- *
- * A character will be read from the first enabled console device that
- * has input available using that console's console_driver::getchar()
- * method. If no console has input available to be read, this method
- * will block. To perform a non-blocking read, use something like
- *
- * @code
- *
- * int key = iskey() ? getchar() : -1;
- *
- * @endcode
- *
- * The character read will not be echoed back to any console.
- *
- */
-int getchar ( void ) {
- struct console_driver *console;
- int character;
-
- while ( 1 ) {
- console = has_input();
- if ( console && console->getchar ) {
- character = console->getchar ();
- break;
- }
-
- /* Doze for a while (until the next interrupt). This works
- * fine, because the keyboard is interrupt-driven, and the
- * timer interrupt (approx. every 50msec) takes care of the
- * serial port, which is read by polling. This reduces the
- * power dissipation of a modern CPU considerably, and also
- * makes Etherboot waiting for user interaction waste a lot
- * less CPU time in a VMware session.
- */
- cpu_nap();
-
- /* Keep processing background tasks while we wait for
- * input.
- */
- step();
- }
-
- /* CR -> LF translation */
- if ( character == '\r' )
- character = '\n';
-
- return character;
-}
-
-/** Check for available input on any console.
- *
- * @v None -
- * @ret True Input is available on a console
- * @ret False Input is not available on any console
- * @err None -
- *
- * All enabled console devices are checked once for available input
- * using each device's console_driver::iskey() method. If any console
- * device has input available, this call will return True. If this
- * call returns True, you can then safely call getchar() without
- * blocking.
- *
- */
-int iskey ( void ) {
- return has_input() ? 1 : 0;
-}