[qemu.git] / tests / rtc-test.c

/*
 * QTest testcase for the MC146818 real-time clock
 *
 * Copyright IBM, Corp. 2012
 *
 * Authors:
 *  Anthony Liguori   <[email protected]>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 *
 */
#include "libqtest.h"
#include "hw/mc146818rtc_regs.h"

#include <glib.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>

static uint8_t base = 0x70;

static int bcd2dec(int value)
{
    return (((value >> 4) & 0x0F) * 10) + (value & 0x0F);
}

static int dec2bcd(int value)
{
    return ((value / 10) << 4) | (value % 10);
}

static uint8_t cmos_read(uint8_t reg)
{
    outb(base + 0, reg);
    return inb(base + 1);
}

static void cmos_write(uint8_t reg, uint8_t val)
{
    outb(base + 0, reg);
    outb(base + 1, val);
}

static int tm_cmp(struct tm *lhs, struct tm *rhs)
{
    time_t a, b;
    struct tm d1, d2;

    memcpy(&d1, lhs, sizeof(d1));
    memcpy(&d2, rhs, sizeof(d2));

    a = mktime(&d1);
    b = mktime(&d2);

    if (a < b) {
        return -1;
    } else if (a > b) {
        return 1;
    }

    return 0;
}

#if 0
static void print_tm(struct tm *tm)
{
    printf("%04d-%02d-%02d %02d:%02d:%02d\n",
           tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
           tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_gmtoff);
}
#endif

static void cmos_get_date_time(struct tm *date)
{
    int base_year = 2000, hour_offset;
    int sec, min, hour, mday, mon, year;
    time_t ts;
    struct tm dummy;

    sec = cmos_read(RTC_SECONDS);
    min = cmos_read(RTC_MINUTES);
    hour = cmos_read(RTC_HOURS);
    mday = cmos_read(RTC_DAY_OF_MONTH);
    mon = cmos_read(RTC_MONTH);
    year = cmos_read(RTC_YEAR);

    if ((cmos_read(RTC_REG_B) & REG_B_DM) == 0) {
        sec = bcd2dec(sec);
        min = bcd2dec(min);
        hour = bcd2dec(hour);
        mday = bcd2dec(mday);
        mon = bcd2dec(mon);
        year = bcd2dec(year);
        hour_offset = 80;
    } else {
        hour_offset = 0x80;
    }

    if ((cmos_read(0x0B) & REG_B_24H) == 0) {
        if (hour >= hour_offset) {
            hour -= hour_offset;
            hour += 12;
        }
    }

    ts = time(NULL);
    localtime_r(&ts, &dummy);

    date->tm_isdst = dummy.tm_isdst;
    date->tm_sec = sec;
    date->tm_min = min;
    date->tm_hour = hour;
    date->tm_mday = mday;
    date->tm_mon = mon - 1;
    date->tm_year = base_year + year - 1900;
#ifndef __sun__
    date->tm_gmtoff = 0;
#endif

    ts = mktime(date);
}

static void check_time(int wiggle)
{
    struct tm start, date[4], end;
    struct tm *datep;
    time_t ts;

    /*
     * This check assumes a few things.  First, we cannot guarantee that we get
     * a consistent reading from the wall clock because we may hit an edge of
     * the clock while reading.  To work around this, we read four clock readings
     * such that at least two of them should match.  We need to assume that one
     * reading is corrupt so we need four readings to ensure that we have at
     * least two consecutive identical readings
     *
     * It's also possible that we'll cross an edge reading the host clock so
     * simply check to make sure that the clock reading is within the period of
     * when we expect it to be.
     */

    ts = time(NULL);
    gmtime_r(&ts, &start);

    cmos_get_date_time(&date[0]);
    cmos_get_date_time(&date[1]);
    cmos_get_date_time(&date[2]);
    cmos_get_date_time(&date[3]);

    ts = time(NULL);
    gmtime_r(&ts, &end);

    if (tm_cmp(&date[0], &date[1]) == 0) {
        datep = &date[0];
    } else if (tm_cmp(&date[1], &date[2]) == 0) {
        datep = &date[1];
    } else if (tm_cmp(&date[2], &date[3]) == 0) {
        datep = &date[2];
    } else {
        g_assert_not_reached();
    }

    if (!(tm_cmp(&start, datep) <= 0 && tm_cmp(datep, &end) <= 0)) {
        long t, s;

        start.tm_isdst = datep->tm_isdst;

        t = (long)mktime(datep);
        s = (long)mktime(&start);
        if (t < s) {
            g_test_message("RTC is %ld second(s) behind wall-clock\n", (s - t));
        } else {
            g_test_message("RTC is %ld second(s) ahead of wall-clock\n", (t - s));
        }

        g_assert_cmpint(ABS(t - s), <=, wiggle);
    }
}

static int wiggle = 2;

static void set_year_20xx(void)
{
    /* Set BCD mode */
    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) & ~REG_B_DM);
    cmos_write(RTC_REG_A, 0x76);
    cmos_write(RTC_YEAR, 0x11);
    cmos_write(RTC_CENTURY, 0x20);
    cmos_write(RTC_MONTH, 0x02);
    cmos_write(RTC_DAY_OF_MONTH, 0x02);
    cmos_write(RTC_HOURS, 0x02);
    cmos_write(RTC_MINUTES, 0x04);
    cmos_write(RTC_SECONDS, 0x58);
    cmos_write(RTC_REG_A, 0x26);

    g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
    g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
    g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
    g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);

    if (sizeof(time_t) == 4) {
        return;
    }

    /* Set a date in 2080 to ensure there is no year-2038 overflow.  */
    cmos_write(RTC_REG_A, 0x76);
    cmos_write(RTC_YEAR, 0x80);
    cmos_write(RTC_REG_A, 0x26);

    g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
    g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
    g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x80);
    g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);

    cmos_write(RTC_REG_A, 0x76);
    cmos_write(RTC_YEAR, 0x11);
    cmos_write(RTC_REG_A, 0x26);

    g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
    g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
    g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
    g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
}

static void set_year_1980(void)
{
    /* Set BCD mode */
    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) & ~REG_B_DM);
    cmos_write(RTC_REG_A, 0x76);
    cmos_write(RTC_YEAR, 0x80);
    cmos_write(RTC_CENTURY, 0x19);
    cmos_write(RTC_MONTH, 0x02);
    cmos_write(RTC_DAY_OF_MONTH, 0x02);
    cmos_write(RTC_HOURS, 0x02);
    cmos_write(RTC_MINUTES, 0x04);
    cmos_write(RTC_SECONDS, 0x58);
    cmos_write(RTC_REG_A, 0x26);

    g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
    g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
    g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x80);
    g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x19);
}

static void bcd_check_time(void)
{
    /* Set BCD mode */
    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) & ~REG_B_DM);
    check_time(wiggle);
}

static void dec_check_time(void)
{
    /* Set DEC mode */
    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) | REG_B_DM);
    check_time(wiggle);
}

static void set_alarm_time(struct tm *tm)
{
    int sec;

    sec = tm->tm_sec;

    if ((cmos_read(RTC_REG_B) & REG_B_DM) == 0) {
        sec = dec2bcd(sec);
    }

    cmos_write(RTC_SECONDS_ALARM, sec);
    cmos_write(RTC_MINUTES_ALARM, RTC_ALARM_DONT_CARE);
    cmos_write(RTC_HOURS_ALARM, RTC_ALARM_DONT_CARE);
}

static void alarm_time(void)
{
    struct tm now;
    time_t ts;
    int i;

    ts = time(NULL);
    gmtime_r(&ts, &now);

    /* set DEC mode */
    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) | REG_B_DM);

    g_assert(!get_irq(RTC_ISA_IRQ));
    cmos_read(RTC_REG_C);

    now.tm_sec = (now.tm_sec + 2) % 60;
    set_alarm_time(&now);
    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) | REG_B_AIE);

    for (i = 0; i < 2 + wiggle; i++) {
        if (get_irq(RTC_ISA_IRQ)) {
            break;
        }

        clock_step(1000000000);
    }

    g_assert(get_irq(RTC_ISA_IRQ));
    g_assert((cmos_read(RTC_REG_C) & REG_C_AF) != 0);
    g_assert(cmos_read(RTC_REG_C) == 0);
}

/* success if no crash or abort */
static void fuzz_registers(void)
{
    unsigned int i;

    for (i = 0; i < 1000; i++) {
        uint8_t reg, val;

        reg = (uint8_t)g_test_rand_int_range(0, 16);
        val = (uint8_t)g_test_rand_int_range(0, 256);

        cmos_write(reg, val);
        cmos_read(reg);
    }
}

static void register_b_set_flag(void)
{
    /* Enable binary-coded decimal (BCD) mode and SET flag in Register B*/
    cmos_write(RTC_REG_B, (cmos_read(RTC_REG_B) & ~REG_B_DM) | REG_B_SET);

    cmos_write(RTC_REG_A, 0x76);
    cmos_write(RTC_YEAR, 0x11);
    cmos_write(RTC_CENTURY, 0x20);
    cmos_write(RTC_MONTH, 0x02);
    cmos_write(RTC_DAY_OF_MONTH, 0x02);
    cmos_write(RTC_HOURS, 0x02);
    cmos_write(RTC_MINUTES, 0x04);
    cmos_write(RTC_SECONDS, 0x58);
    cmos_write(RTC_REG_A, 0x26);

    /* Since SET flag is still enabled, these are equality checks. */
    g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
    g_assert_cmpint(cmos_read(RTC_SECONDS), ==, 0x58);
    g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
    g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);

    /* Disable SET flag in Register B */
    cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) & ~REG_B_SET);

    g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);

    /* Since SET flag is disabled, this is an inequality check.
     * We (reasonably) assume that no (sexagesimal) overflow occurs. */
    g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
    g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
    g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
    g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
}

int main(int argc, char **argv)
{
    QTestState *s = NULL;
    int ret;

    g_test_init(&argc, &argv, NULL);

    s = qtest_start("-display none -rtc clock=vm");
    qtest_irq_intercept_in(s, "ioapic");

    qtest_add_func("/rtc/bcd/check-time", bcd_check_time);
    qtest_add_func("/rtc/dec/check-time", dec_check_time);
    qtest_add_func("/rtc/alarm-time", alarm_time);
    qtest_add_func("/rtc/set-year/20xx", set_year_20xx);
    qtest_add_func("/rtc/set-year/1980", set_year_1980);
    qtest_add_func("/rtc/register_b_set_flag", register_b_set_flag);
    qtest_add_func("/rtc/fuzz-registers", fuzz_registers);
    ret = g_test_run();

    if (s) {
        qtest_quit(s);
    }

    return ret;
}
Commit	Line	Data
d1aaf543 AL	1	/*
	2	* QTest testcase for the MC146818 real-time clock
	3	*
	4	* Copyright IBM, Corp. 2012
	5	*
	6	* Authors:
	7	* Anthony Liguori <[email protected]>
	8	*
	9	* This work is licensed under the terms of the GNU GPL, version 2 or later.
	10	* See the COPYING file in the top-level directory.
	11	*
	12	*/
	13	#include "libqtest.h"
	14	#include "hw/mc146818rtc_regs.h"
	15
	16	#include <glib.h>
	17	#include <stdio.h>
	18	#include <string.h>
	19	#include <stdlib.h>
	20	#include <unistd.h>
	21
	22	static uint8_t base = 0x70;
	23
	24	static int bcd2dec(int value)
	25	{
	26	return (((value >> 4) & 0x0F) * 10) + (value & 0x0F);
	27	}
	28
	29	static int dec2bcd(int value)
	30	{
	31	return ((value / 10) << 4) \| (value % 10);
	32	}
	33
	34	static uint8_t cmos_read(uint8_t reg)
	35	{
	36	outb(base + 0, reg);
	37	return inb(base + 1);
	38	}
	39
	40	static void cmos_write(uint8_t reg, uint8_t val)
	41	{
	42	outb(base + 0, reg);
	43	outb(base + 1, val);
	44	}
	45
	46	static int tm_cmp(struct tm lhs, struct tm rhs)
	47	{
	48	time_t a, b;
	49	struct tm d1, d2;
	50
	51	memcpy(&d1, lhs, sizeof(d1));
	52	memcpy(&d2, rhs, sizeof(d2));
	53
	54	a = mktime(&d1);
	55	b = mktime(&d2);
	56
	57	if (a < b) {
	58	return -1;
	59	} else if (a > b) {
	60	return 1;
	61	}
	62
	63	return 0;
	64	}
65
66	#if 0
67	static void print_tm(struct tm *tm)
68	{
69	printf("%04d-%02d-%02d %02d:%02d:%02d\n",
70	tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
71	tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_gmtoff);
72	}
73	#endif
74
75	static void cmos_get_date_time(struct tm *date)
76	{
77	int base_year = 2000, hour_offset;
78	int sec, min, hour, mday, mon, year;
79	time_t ts;
80	struct tm dummy;
81
82	sec = cmos_read(RTC_SECONDS);
83	min = cmos_read(RTC_MINUTES);
84	hour = cmos_read(RTC_HOURS);
85	mday = cmos_read(RTC_DAY_OF_MONTH);
86	mon = cmos_read(RTC_MONTH);
87	year = cmos_read(RTC_YEAR);
88
89	if ((cmos_read(RTC_REG_B) & REG_B_DM) == 0) {
90	sec = bcd2dec(sec);
91	min = bcd2dec(min);
92	hour = bcd2dec(hour);
93	mday = bcd2dec(mday);
94	mon = bcd2dec(mon);
95	year = bcd2dec(year);
96	hour_offset = 80;
97	} else {
98	hour_offset = 0x80;
99	}
100
101	if ((cmos_read(0x0B) & REG_B_24H) == 0) {
102	if (hour >= hour_offset) {
103	hour -= hour_offset;
104	hour += 12;
105	}
106	}
107
108	ts = time(NULL);
109	localtime_r(&ts, &dummy);
110
111	date->tm_isdst = dummy.tm_isdst;
112	date->tm_sec = sec;
113	date->tm_min = min;
114	date->tm_hour = hour;
115	date->tm_mday = mday;
116	date->tm_mon = mon - 1;
117	date->tm_year = base_year + year - 1900;
a05ddd92	118	#ifndef __sun__
d1aaf543	119	date->tm_gmtoff = 0;
a05ddd92	120	#endif
d1aaf543 AL	121
	122	ts = mktime(date);
	123	}
	124
	125	static void check_time(int wiggle)
	126	{
	127	struct tm start, date[4], end;
	128	struct tm *datep;
	129	time_t ts;
	130
	131	/*
	132	* This check assumes a few things. First, we cannot guarantee that we get
	133	* a consistent reading from the wall clock because we may hit an edge of
	134	* the clock while reading. To work around this, we read four clock readings
	135	* such that at least two of them should match. We need to assume that one
	136	* reading is corrupt so we need four readings to ensure that we have at
	137	* least two consecutive identical readings
	138	*
	139	* It's also possible that we'll cross an edge reading the host clock so
	140	* simply check to make sure that the clock reading is within the period of
	141	* when we expect it to be.
	142	*/
	143
	144	ts = time(NULL);
	145	gmtime_r(&ts, &start);
	146
	147	cmos_get_date_time(&date[0]);
	148	cmos_get_date_time(&date[1]);
	149	cmos_get_date_time(&date[2]);
	150	cmos_get_date_time(&date[3]);
	151
	152	ts = time(NULL);
	153	gmtime_r(&ts, &end);
	154
	155	if (tm_cmp(&date[0], &date[1]) == 0) {
	156	datep = &date[0];
	157	} else if (tm_cmp(&date[1], &date[2]) == 0) {
	158	datep = &date[1];
	159	} else if (tm_cmp(&date[2], &date[3]) == 0) {
	160	datep = &date[2];
	161	} else {
	162	g_assert_not_reached();
	163	}
	164
	165	if (!(tm_cmp(&start, datep) <= 0 && tm_cmp(datep, &end) <= 0)) {
02b3efcb	166	long t, s;
d1aaf543 AL	167
	168	start.tm_isdst = datep->tm_isdst;
	169
02b3efcb BS	170	t = (long)mktime(datep);
02b3efcb BS	171	s = (long)mktime(&start);
d1aaf543 AL	172	if (t < s) {
	173	g_test_message("RTC is %ld second(s) behind wall-clock\n", (s - t));
	174	} else {
	175	g_test_message("RTC is %ld second(s) ahead of wall-clock\n", (t - s));
	176	}
	177
	178	g_assert_cmpint(ABS(t - s), <=, wiggle);
	179	}
	180	}
	181
	182	static int wiggle = 2;
	183
b8994faf	184	static void set_year_20xx(void)
b6db4aca PB	185	{
	186	/* Set BCD mode */
	187	cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) & ~REG_B_DM);
	188	cmos_write(RTC_REG_A, 0x76);
	189	cmos_write(RTC_YEAR, 0x11);
b8994faf	190	cmos_write(RTC_CENTURY, 0x20);
b6db4aca PB	191	cmos_write(RTC_MONTH, 0x02);
	192	cmos_write(RTC_DAY_OF_MONTH, 0x02);
	193	cmos_write(RTC_HOURS, 0x02);
	194	cmos_write(RTC_MINUTES, 0x04);
	195	cmos_write(RTC_SECONDS, 0x58);
	196	cmos_write(RTC_REG_A, 0x26);
	197
	198	g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
	199	g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
	200	g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
	201	g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
	202	g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
	203	g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
b8994faf	204	g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
b6db4aca	205
4e45deed GH	206	if (sizeof(time_t) == 4) {
	207	return;
	208	}
	209
b6db4aca PB	210	/* Set a date in 2080 to ensure there is no year-2038 overflow. */
	211	cmos_write(RTC_REG_A, 0x76);
	212	cmos_write(RTC_YEAR, 0x80);
	213	cmos_write(RTC_REG_A, 0x26);
	214
	215	g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
	216	g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
	217	g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
	218	g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
	219	g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
	220	g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x80);
b8994faf	221	g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
b6db4aca PB	222
	223	cmos_write(RTC_REG_A, 0x76);
	224	cmos_write(RTC_YEAR, 0x11);
	225	cmos_write(RTC_REG_A, 0x26);
	226
	227	g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
	228	g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
	229	g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
	230	g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
	231	g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
	232	g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
b8994faf PB	233	g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
	234	}
	235
	236	static void set_year_1980(void)
	237	{
	238	/* Set BCD mode */
	239	cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) & ~REG_B_DM);
	240	cmos_write(RTC_REG_A, 0x76);
	241	cmos_write(RTC_YEAR, 0x80);
	242	cmos_write(RTC_CENTURY, 0x19);
	243	cmos_write(RTC_MONTH, 0x02);
	244	cmos_write(RTC_DAY_OF_MONTH, 0x02);
	245	cmos_write(RTC_HOURS, 0x02);
	246	cmos_write(RTC_MINUTES, 0x04);
	247	cmos_write(RTC_SECONDS, 0x58);
	248	cmos_write(RTC_REG_A, 0x26);
	249
	250	g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
	251	g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
	252	g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
	253	g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
	254	g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
	255	g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x80);
	256	g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x19);
b6db4aca PB	257	}
b6db4aca PB	258
d1aaf543 AL	259	static void bcd_check_time(void)
	260	{
	261	/* Set BCD mode */
	262	cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) & ~REG_B_DM);
	263	check_time(wiggle);
	264	}
	265
	266	static void dec_check_time(void)
	267	{
	268	/* Set DEC mode */
	269	cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) \| REG_B_DM);
	270	check_time(wiggle);
	271	}
	272
	273	static void set_alarm_time(struct tm *tm)
	274	{
	275	int sec;
	276
	277	sec = tm->tm_sec;
	278
	279	if ((cmos_read(RTC_REG_B) & REG_B_DM) == 0) {
	280	sec = dec2bcd(sec);
	281	}
	282
	283	cmos_write(RTC_SECONDS_ALARM, sec);
	284	cmos_write(RTC_MINUTES_ALARM, RTC_ALARM_DONT_CARE);
	285	cmos_write(RTC_HOURS_ALARM, RTC_ALARM_DONT_CARE);
	286	}
	287
	288	static void alarm_time(void)
	289	{
	290	struct tm now;
	291	time_t ts;
	292	int i;
	293
	294	ts = time(NULL);
	295	gmtime_r(&ts, &now);
	296
	297	/* set DEC mode */
	298	cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) \| REG_B_DM);
	299
	300	g_assert(!get_irq(RTC_ISA_IRQ));
	301	cmos_read(RTC_REG_C);
	302
	303	now.tm_sec = (now.tm_sec + 2) % 60;
	304	set_alarm_time(&now);
	305	cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) \| REG_B_AIE);
	306
	307	for (i = 0; i < 2 + wiggle; i++) {
	308	if (get_irq(RTC_ISA_IRQ)) {
	309	break;
	310	}
	311
	312	clock_step(1000000000);
	313	}
	314
	315	g_assert(get_irq(RTC_ISA_IRQ));
	316	g_assert((cmos_read(RTC_REG_C) & REG_C_AF) != 0);
	317	g_assert(cmos_read(RTC_REG_C) == 0);
	318	}
	319
85215d41 BS	320	/* success if no crash or abort */
	321	static void fuzz_registers(void)
	322	{
	323	unsigned int i;
	324
	325	for (i = 0; i < 1000; i++) {
	326	uint8_t reg, val;
	327
	328	reg = (uint8_t)g_test_rand_int_range(0, 16);
	329	val = (uint8_t)g_test_rand_int_range(0, 256);
	330
	331	cmos_write(reg, val);
	332	cmos_read(reg);
	333	}
	334	}
	335
02c6ccc6 AH	336	static void register_b_set_flag(void)
	337	{
	338	/* Enable binary-coded decimal (BCD) mode and SET flag in Register B*/
	339	cmos_write(RTC_REG_B, (cmos_read(RTC_REG_B) & ~REG_B_DM) \| REG_B_SET);
	340
	341	cmos_write(RTC_REG_A, 0x76);
	342	cmos_write(RTC_YEAR, 0x11);
	343	cmos_write(RTC_CENTURY, 0x20);
	344	cmos_write(RTC_MONTH, 0x02);
	345	cmos_write(RTC_DAY_OF_MONTH, 0x02);
	346	cmos_write(RTC_HOURS, 0x02);
	347	cmos_write(RTC_MINUTES, 0x04);
	348	cmos_write(RTC_SECONDS, 0x58);
	349	cmos_write(RTC_REG_A, 0x26);
	350
	351	/* Since SET flag is still enabled, these are equality checks. */
	352	g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
	353	g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
	354	g_assert_cmpint(cmos_read(RTC_SECONDS), ==, 0x58);
	355	g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
	356	g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
	357	g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
	358	g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
	359
	360	/* Disable SET flag in Register B */
	361	cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) & ~REG_B_SET);
	362
	363	g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
	364	g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
	365
	366	/* Since SET flag is disabled, this is an inequality check.
	367	* We (reasonably) assume that no (sexagesimal) overflow occurs. */
	368	g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
	369	g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
	370	g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
	371	g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
	372	g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
	373	}
	374
d1aaf543 AL	375	int main(int argc, char **argv)
	376	{
	377	QTestState *s = NULL;
	378	int ret;
	379
	380	g_test_init(&argc, &argv, NULL);
	381
	382	s = qtest_start("-display none -rtc clock=vm");
	383	qtest_irq_intercept_in(s, "ioapic");
	384
	385	qtest_add_func("/rtc/bcd/check-time", bcd_check_time);
	386	qtest_add_func("/rtc/dec/check-time", dec_check_time);
	387	qtest_add_func("/rtc/alarm-time", alarm_time);
b8994faf PB	388	qtest_add_func("/rtc/set-year/20xx", set_year_20xx);
b8994faf PB	389	qtest_add_func("/rtc/set-year/1980", set_year_1980);
02c6ccc6	390	qtest_add_func("/rtc/register_b_set_flag", register_b_set_flag);
85215d41	391	qtest_add_func("/rtc/fuzz-registers", fuzz_registers);
d1aaf543 AL	392	ret = g_test_run();
	393
	394	if (s) {
	395	qtest_quit(s);
	396	}
	397
	398	return ret;
	399	}