Add gPXE into the source tree; build unified imagesyslinux-3.70-pre7

1 files changed, 114 insertions, 0 deletions

diff --git a/gpxe/src/include/console.h b/gpxe/src/include/console.h
new file mode 100644
index 00000000..9addd526
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+++ b/gpxe/src/include/console.h
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+#ifndef CONSOLE_H
+#define CONSOLE_H
+
+#include <gpxe/tables.h>
+
+/** @file
+ *
+ * User interaction.
+ *
+ * Various console devices can be selected via the build options
+ * CONSOLE_FIRMWARE, CONSOLE_SERIAL etc.  The console functions
+ * putchar(), getchar() and iskey() delegate to the individual console
+ * drivers.
+ *
+ */
+
+/**
+ * A console driver
+ *
+ * Defines the functions that implement a particular console type.
+ * Must be made part of the console drivers table by using
+ * #__console_driver.
+ *
+ * @note Consoles that cannot be used before their initialisation
+ * function has completed should set #disabled=1 initially.  This
+ * allows other console devices to still be used to print out early
+ * debugging messages.
+ *
+ */
+struct console_driver {
+	/** Console is disabled.
+	 *
+	 * The console's putchar(), putline(), getchar() and iskey()
+	 * methods will not be called while #disabled==1. Typically
+	 * the console's initialisation functions will set #disabled=0
+	 * upon completion.
+	 *
+	 */
+	int disabled;
+
+	/** Write a character to the console.
+	 *
+	 * @v character		Character to be written
+	 * @ret None		-
+	 * @err None		-
+	 *
+	 */
+	void ( *putchar ) ( int character );
+
+	/** Write an entire line to the console.
+	 * This is intended to be used by line-oriented output media,
+	 * like system logging facilities or line printers.
+	 * Line output will not contain non-printable characters.
+	 *
+	 * @v linebuffer	Pointer to the \0-terminated line
+	 * @ret None		-
+	 * @err None		-
+	 */
+	void ( * putline ) ( unsigned char * linebuffer );
+
+	/** Read a character from the console.
+	 *
+	 * @v None		-
+	 * @ret character	Character read
+	 * @err None		-
+	 *
+	 * If no character is available to be read, this method will
+	 * block.  The character read should not be echoed back to the
+	 * console.
+	 *
+	 */
+	int ( *getchar ) ( void );
+
+	/** Check for available input.
+	 *
+	 * @v None		-
+	 * @ret True		Input is available
+	 * @ret False		Input is not available
+	 * @err None		-
+	 *
+	 * This should return True if a subsequent call to getchar()
+	 * will not block.
+	 *
+	 */
+	int ( *iskey ) ( void );
+};
+
+/**
+ * Mark a <tt> struct console_driver </tt> as being part of the
+ * console drivers table.
+ *
+ * Use as e.g.
+ *
+ * @code
+ *
+ *   struct console_driver my_console __console_driver = {
+ *      .putchar = my_putchar,
+ *	.getchar = my_getchar,
+ *	.iskey = my_iskey,
+ *   };
+ *
+ * @endcode
+ *
+ */
+#define __console_driver __table ( struct console_driver, console, 01 )
+
+/* Function prototypes */
+
+extern void putchar ( int character );
+extern int getchar ( void );
+extern int iskey ( void );
+extern int getkey ( void );
+
+#endif /* CONSOLE_H */