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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [libgloss/] [moxie/] [qemu-time.c] - Rev 207
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/* qemu-time.c -- stubs so clock can be linked in. * * Copyright (c) 2008 Anthony Green * * The authors hereby grant permission to use, copy, modify, distribute, * and license this software and its documentation for any purpose, provided * that existing copyright notices are retained in all copies and that this * notice is included verbatim in any distributions. No written agreement, * license, or royalty fee is required for any of the authorized uses. * Modifications to this software may be copyrighted by their authors * and need not follow the licensing terms described here, provided that * the new terms are clearly indicated on the first page of each file where * they apply. */ #include <errno.h> #include <time.h> #include <sys/time.h> #include <sys/times.h> #include "glue.h" /* This is the base address of the mc146818 RTC i/o port. */ #define RTC_PORT 0x400 #define RTC_SECONDS 0x00 #define RTC_SECONDS_ALARM 0x01 #define RTC_MINUTES 0x02 #define RTC_MINUTES_ALARM 0x03 #define RTC_HOURS 0x04 #define RTC_HOURS_ALARM 0x05 #define RTC_DAY_OF_WEEK 0x06 #define RTC_DATE_OF_MONTH 0x07 #define RTC_MONTH 0x08 #define RTC_YEAR 0x09 #define RTC_CONFIG_A 0x0A #define RTC_CONFIG_B 0x0B #define RTC_CONFIG_C 0x0C #define RTC_CONFIG_D 0x0D /* * _times -- FIXME */ int _DEFUN (_times, _times (buf), struct tms *buf) { errno = EINVAL; return (-1); } /* Read a value from the RTC port. */ static unsigned char rtc_read (unsigned char reg) { *(volatile unsigned char *)(RTC_PORT) = reg; return *(volatile unsigned char *)(RTC_PORT + 1); } /* Write a value to the RTC port. */ static void rtc_write (unsigned char reg, unsigned char val) { *(volatile unsigned char *)(RTC_PORT) = reg; *(volatile unsigned char *)(RTC_PORT + 1) = val; } /* Convert BCD to Decimal. */ #define BCD2DEC(BYTE) ((((BYTE >> 4) & 0xF) * 10) + (BYTE & 0xF)) /* * time -- return current time in seconds. */ time_t _DEFUN (time, time (t), time_t *t) { struct tm tm; time_t ret; tm.tm_sec = BCD2DEC(rtc_read(RTC_SECONDS)); tm.tm_min = BCD2DEC(rtc_read(RTC_MINUTES)); tm.tm_hour = BCD2DEC(rtc_read(RTC_HOURS)); tm.tm_wday = BCD2DEC(rtc_read(RTC_DAY_OF_WEEK)) - 1; tm.tm_mday = BCD2DEC(rtc_read(RTC_DATE_OF_MONTH)); tm.tm_mon = BCD2DEC(rtc_read(RTC_MONTH)) - 1; tm.tm_year = BCD2DEC(rtc_read(RTC_YEAR)) + 100; /* FIXME. Not really sure how to handle this. */ tm.tm_isdst = 1; ret = mktime(&tm); if (t) *t = ret; return ret; } /* * _gettimeofday -- implement in terms of time, which means we can't * return the microseconds. */ int _DEFUN (_gettimeofday, _gettimeofday (tv, tz), struct timeval *tv _AND void *tzvp) { struct timezone *tz = tzvp; struct tm tm; if (tz) tz->tz_minuteswest = tz->tz_dsttime = 0; tv->tv_usec = 0; tv->tv_sec = time(0); return 0; }