cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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intersil.c (1690B)

      1/*
      2 * arch/m68k/sun3/intersil.c
      3 *
      4 * basic routines for accessing the intersil clock within the sun3 machines
      5 *
      6 * started 11/12/1999 Sam Creasey
      7 *
      8 * This file is subject to the terms and conditions of the GNU General Public
      9 * License.  See the file COPYING in the main directory of this archive
     10 * for more details.
     11 */
     12
     13#include <linux/kernel.h>
     14#include <linux/rtc.h>
     15
     16#include <asm/errno.h>
     17#include <asm/intersil.h>
     18#include <asm/machdep.h>
     19
     20
     21/* bits to set for start/run of the intersil */
     22#define STOP_VAL (INTERSIL_STOP | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
     23#define START_VAL (INTERSIL_RUN | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
     24
     25/* get/set hwclock */
     26
     27int sun3_hwclk(int set, struct rtc_time *t)
     28{
     29	volatile struct intersil_dt *todintersil;
     30	unsigned long flags;
     31
     32        todintersil = (struct intersil_dt *) &intersil_clock->counter;
     33
     34	local_irq_save(flags);
     35
     36	intersil_clock->cmd_reg = STOP_VAL;
     37
     38	/* set or read the clock */
     39	if(set) {
     40		todintersil->csec = 0;
     41		todintersil->hour = t->tm_hour;
     42		todintersil->minute = t->tm_min;
     43		todintersil->second = t->tm_sec;
     44		todintersil->month = t->tm_mon + 1;
     45		todintersil->day = t->tm_mday;
     46		todintersil->year = (t->tm_year - 68) % 100;
     47		todintersil->weekday = t->tm_wday;
     48	} else {
     49		/* read clock */
     50		t->tm_sec = todintersil->csec;
     51		t->tm_hour = todintersil->hour;
     52		t->tm_min = todintersil->minute;
     53		t->tm_sec = todintersil->second;
     54		t->tm_mon = todintersil->month - 1;
     55		t->tm_mday = todintersil->day;
     56		t->tm_year = todintersil->year + 68;
     57		t->tm_wday = todintersil->weekday;
     58		if (t->tm_year < 70)
     59			t->tm_year += 100;
     60	}
     61
     62	intersil_clock->cmd_reg = START_VAL;
     63
     64	local_irq_restore(flags);
     65
     66	return 0;
     67
     68}
     69