diff options
Diffstat (limited to 'tools/build/os/msdos/fixtimer.c')
-rw-r--r-- | tools/build/os/msdos/fixtimer.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/tools/build/os/msdos/fixtimer.c b/tools/build/os/msdos/fixtimer.c deleted file mode 100644 index 3b71032550..0000000000 --- a/tools/build/os/msdos/fixtimer.c +++ /dev/null @@ -1,111 +0,0 @@ -/* - * $Id$ - */ - -#include <stdio.h> -#include <dos.h> - -#define IO_RTC 0x70 /* RTC */ - -#define RTC_SEC 0x00 /* seconds */ -#define RTC_MIN 0x02 /* minutes */ -#define RTC_HRS 0x04 /* hours */ -#define RTC_WDAY 0x06 /* week day */ -#define RTC_DAY 0x07 /* day of month */ -#define RTC_MONTH 0x08 /* month of year */ -#define RTC_YEAR 0x09 /* month of year */ -#define RTC_STATUSA 0x0a /* status register A */ -#define RTCSA_TUP 0x80 /* time update, don't look now */ - -#define RTC_STATUSB 0x0b /* status register B */ - -#define RTC_DIAG 0x0e /* status register E - bios diagnostic */ -#define RTCDG_BITS "\020\010clock_battery\007ROM_cksum\006config_unit\005memory_size\004fixed_disk\003invalid_time" - - - -/* convert 2 digit BCD number */ -static int bcd( unsigned int i ) -{ - return ((i/16)*10 + (i%16)); -} - -static unsigned int rtcin( unsigned int what ) -{ - outportb( IO_RTC, what ); - return inportb( IO_RTC+1 ); -} - - -void fix_date( void ) -{ - int s; - struct date date; - struct time time; - - /* initialize brain-dead battery powered clock */ - outportb( IO_RTC, RTC_STATUSA ); - outportb( IO_RTC+1, 0x26 ); - outportb( IO_RTC, RTC_STATUSB ); - outportb( IO_RTC+1, 2 ); - - outportb( IO_RTC, RTC_DIAG ); - s = inportb( IO_RTC+1 ); - if (s) printf("RTC BIOS diagnostic error %b\n", s, RTCDG_BITS); - - /* check for presence of clock */ - s = rtcin(RTC_STATUSA); - if ( s == 0xff || s == 0 ) { - printf( "Real-time clock not found\n" ); - return; - } - - /* ready for a read? */ - while ((s & RTCSA_TUP) == RTCSA_TUP) - s = rtcin(RTC_STATUSA); - - date.da_year = bcd(rtcin(RTC_YEAR)) + 1900; /* year */ - if ( date.da_year < 1970) date.da_year += 100; - date.da_year -= 1980; - date.da_mon = bcd(rtcin(RTC_MONTH)); /* month */ - date.da_day = bcd(rtcin(RTC_DAY)); /* day */ - - (void)bcd(rtcin(RTC_WDAY)); /* weekday */ - - time.ti_hour = bcd(rtcin(RTC_HRS)); /* hour */ - time.ti_min = bcd(rtcin(RTC_MIN)); /* minutes */ - time.ti_sec = bcd(rtcin(RTC_SEC)); /* seconds */ - time.ti_hund = 0; - - setdate( & date ); - settime( & time ); -} - - - - -void fix_timer( void ) -{ -#define PIT_PORT 0x40 -#define TIMER_CNTR0 (PIT_PORT + 0) /* timer 0 counter port */ -#define TIMER_MODE (PIT_PORT + 3) /* timer mode port */ -#define TIMER_SEL0 0x00 /* select counter 0 */ -#define TIMER_RATEGEN 0x04 /* mode 2, rate generator */ -#define TIMER_16BIT 0x30 /* r/w counter 16 bits, LSB first */ - - /* set timer 0 to generate interrupts every period */ - outportb( TIMER_MODE, TIMER_SEL0|TIMER_RATEGEN|TIMER_16BIT ); - outportb( TIMER_CNTR0, 0 ); /* counter low */ - outportb( TIMER_CNTR0, 0 ); /* counter high */ -} - -int main(void) -{ - /* Make timer count at correct pace */ - fix_timer(); - - /* Fix the date */ - fix_date(); - - return 0; -} |