Annotation of sys/arch/aviion/stand/libsa/clock.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: clock.c,v 1.1 2006/05/16 22:48:18 miod Exp $ */
! 2:
! 3:
! 4: #include <sys/types.h>
! 5: #include <machine/prom.h>
! 6:
! 7: #include "stand.h"
! 8: #include "libsa.h"
! 9:
! 10: #include "nvramreg.h"
! 11:
! 12: /*
! 13: * BCD to decimal and decimal to BCD.
! 14: */
! 15: #define FROMBCD(x) (((x) >> 4) * 10 + ((x) & 0xf))
! 16: #define TOBCD(x) (((x) / 10 * 16) + ((x) % 10))
! 17:
! 18: #define SECDAY (24 * 60 * 60)
! 19: #define SECYR (SECDAY * 365)
! 20: #define LEAPYEAR(y) (((y) & 3) == 0)
! 21:
! 22: /*
! 23: * This code is defunct after 2068.
! 24: * Will Unix still be here then??
! 25: */
! 26: const int dayyr[12] =
! 27: { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
! 28:
! 29: u_long
! 30: chiptotime(sec, min, hour, day, mon, year)
! 31: int sec, min, hour, day, mon, year;
! 32: {
! 33: int days, yr;
! 34:
! 35: sec = FROMBCD(sec);
! 36: min = FROMBCD(min);
! 37: hour = FROMBCD(hour);
! 38: day = FROMBCD(day);
! 39: mon = FROMBCD(mon);
! 40: year = FROMBCD(year) + YEAR0;
! 41:
! 42: /* simple sanity checks */
! 43: if (year > 164 || mon < 1 || mon > 12 || day < 1 || day > 31)
! 44: return (0);
! 45: yr = 70;
! 46: days = 0;
! 47:
! 48: if (year < 70) {
! 49: for (; yr < year; yr++)
! 50: days += LEAPYEAR(yr) ? 366 : 365;
! 51: yr = 0;
! 52: }
! 53:
! 54: for (; yr < year; yr++)
! 55: days += LEAPYEAR(yr) ? 366 : 365;
! 56:
! 57: days += dayyr[mon - 1] + day - 1;
! 58:
! 59: if (LEAPYEAR(yr) && mon > 2)
! 60: days++;
! 61:
! 62: /* now have days since Jan 1, 1970; the rest is easy... */
! 63: return (days * SECDAY + hour * 3600 + min * 60 + sec);
! 64: }
! 65:
! 66: time_t
! 67: getsecs()
! 68: {
! 69: int sec, min, hour, day, mon, year;
! 70: #define TOD_BASE (0xfff80000 + AV400_NVRAM_TOD_OFF)
! 71:
! 72: *(volatile u_int32_t *)(TOD_BASE + (CLK_CSR << 2)) = CLK_READ |
! 73: *(volatile u_int32_t *)(TOD_BASE + (CLK_CSR << 2));
! 74: sec = *(volatile u_int32_t *)(TOD_BASE + (CLK_SEC << 2)) & 0xff;
! 75: min = *(volatile u_int32_t *)(TOD_BASE + (CLK_MIN << 2)) & 0xff;
! 76: hour = *(volatile u_int32_t *)(TOD_BASE + (CLK_HOUR << 2)) & 0xff;
! 77: day = *(volatile u_int32_t *)(TOD_BASE + (CLK_DAY << 2)) & 0xff;
! 78: mon = *(volatile u_int32_t *)(TOD_BASE + (CLK_MONTH << 2)) & 0xff;
! 79: year = *(volatile u_int32_t *)(TOD_BASE + (CLK_YEAR << 2)) & 0xff;
! 80: *(volatile u_int32_t *)(TOD_BASE + (CLK_CSR << 2)) = ~CLK_READ &
! 81: *(volatile u_int32_t *)(TOD_BASE + (CLK_CSR << 2));
! 82:
! 83: return (chiptotime(sec, min, hour, day, mon, year));
! 84: }
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