85 lines
1.6 KiB
C
85 lines
1.6 KiB
C
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/*
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** Copyright 2003, Jeff Ward, jeff@r2d2.stcloudstate.edu. All rights reserved.
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** Distributed under the terms of the OpenBeOS License.
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*/
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#include <OS.h>
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#include <debug.h>
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#include <stdlib.h>
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#include <arch/real_time_clock.h>
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#include <real_time_clock.h>
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static bigtime_t boot_time;
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static void
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rtc_print(void) {
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uint32 current_time;
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current_time = (boot_time + system_time()) / 1000000;
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dprintf("system_time: %u\n", (unsigned)system_time());
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dprintf("boot_time: %u\n", (unsigned)boot_time);
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dprintf("current_time: %u\n", (unsigned)current_time);
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}
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static int
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rtc_debug(int argc, char** argv) {
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// If no arguments were given, output all usefull data.
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if (argc < 2)
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rtc_print();
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// If there was an argument, reset the system and hw time.
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else {
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rtc_set_system_time( strtoul(argv[1], NULL, 10) );
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rtc_system_to_hw();
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}
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return 0;
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}
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int
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rtc_init(kernel_args *ka) {
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dprintf("rtc_init: entry\n");
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add_debugger_command("rtc", &rtc_debug, "Set and test the real-time clock");
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rtc_hw_to_system();
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return 0;
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}
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void
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rtc_set_system_time(uint32 current_time) {
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uint64 useconds;
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useconds = (uint64)current_time * 1000000;
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boot_time = useconds - system_time();
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}
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/** Write the system time to CMOS. */
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void
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rtc_system_to_hw(void) {
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uint32 seconds;
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seconds = (boot_time + system_time()) / 1000000;
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arch_rtc_set_hw_time(seconds);
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}
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/** Read the CMOS clock and update the system time accordingly. */
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void
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rtc_hw_to_system(void) {
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uint32 current_time;
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current_time = arch_rtc_get_hw_time();
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rtc_set_system_time(current_time);
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}
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bigtime_t
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rtc_boot_time(void) {
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return boot_time;
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}
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