Added real-time clock support written by Jeff Ward (for the kernel).

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5137 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/arch/real_time_clock.h

@@ -0,0 +1,15 @@
+/* 
+** Copyright 2003, Jeff Ward, [email protected]. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+#ifndef KERNEL_ARCH_REAL_TIME_CLOCK_H
+#define KERNEL_ARCH_REAL_TIME_CLOCK_H
+
+#include <kernel.h>
+
+void arch_rtc_set_hw_time(uint32 seconds);
+	// Set HW clock to 'seconds' since 1/1/1970
+uint32 arch_rtc_get_hw_time(void);
+	// Returns number of seconds since 1/1/1970 as stored in HW
+
+#endif	/* KERNEL_ARCH_REAL_TIME_CLOCK_H */

headers/private/kernel/real_time_clock.h

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+/* 
+** Copyright 2003, Jeff Ward, [email protected]. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+#ifndef _KERNEL_REAL_TIME_CLOCK_H
+#define _KERNEL_REAL_TIME_CLOCK_H
+
+
+#include <KernelExport.h>
+
+
+int rtc_init(kernel_args *ka);
+// Initialize the real-time clock.
+
+void rtc_set_system_time(uint32 current_time);
+// Set the system time.  'current_time' is the number of seconds elapsed since
+// Jan. 1, 1970.
+
+bigtime_t rtc_boot_time(void);
+// Returns the time at which the system was booted in microseconds since Jan 1, 1970.
+
+#endif /* _KERNEL_REAL_TIME_CLOCK_H */