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/*
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* QTest testcase for the MC146818 real-time clock
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*
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* Copyright IBM, Corp. 2012
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "libqtest.h" |
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#include "hw/mc146818rtc_regs.h" |
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#include <glib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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static uint8_t base = 0x70; |
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static int bcd2dec(int value) |
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{
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return (((value >> 4) & 0x0F) * 10) + (value & 0x0F); |
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} |
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static uint8_t cmos_read(uint8_t reg)
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{
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outb(base + 0, reg);
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return inb(base + 1); |
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} |
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static void cmos_write(uint8_t reg, uint8_t val) |
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{
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outb(base + 0, reg);
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outb(base + 1, val);
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} |
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static int tm_cmp(struct tm *lhs, struct tm *rhs) |
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{
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time_t a, b; |
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struct tm d1, d2;
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|
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memcpy(&d1, lhs, sizeof(d1));
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memcpy(&d2, rhs, sizeof(d2));
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a = mktime(&d1); |
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b = mktime(&d2); |
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|
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if (a < b) {
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return -1; |
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} else if (a > b) { |
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return 1; |
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} |
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return 0; |
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} |
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|
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#if 0
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static void print_tm(struct tm *tm)
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{
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printf("%04d-%02d-%02d %02d:%02d:%02d\n",
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tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
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tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_gmtoff);
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}
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#endif
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static void cmos_get_date_time(struct tm *date) |
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{
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int base_year = 2000, hour_offset; |
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int sec, min, hour, mday, mon, year;
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time_t ts; |
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struct tm dummy;
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sec = cmos_read(RTC_SECONDS); |
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min = cmos_read(RTC_MINUTES); |
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hour = cmos_read(RTC_HOURS); |
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mday = cmos_read(RTC_DAY_OF_MONTH); |
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mon = cmos_read(RTC_MONTH); |
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year = cmos_read(RTC_YEAR); |
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|
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if ((cmos_read(RTC_REG_B) & REG_B_DM) == 0) { |
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sec = bcd2dec(sec); |
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min = bcd2dec(min); |
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hour = bcd2dec(hour); |
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mday = bcd2dec(mday); |
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mon = bcd2dec(mon); |
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year = bcd2dec(year); |
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hour_offset = 80;
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} else {
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hour_offset = 0x80;
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} |
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if ((cmos_read(0x0B) & REG_B_24H) == 0) { |
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if (hour >= hour_offset) {
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hour -= hour_offset; |
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hour += 12;
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} |
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} |
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ts = time(NULL);
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localtime_r(&ts, &dummy); |
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date->tm_isdst = dummy.tm_isdst; |
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date->tm_sec = sec; |
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date->tm_min = min; |
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date->tm_hour = hour; |
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date->tm_mday = mday; |
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date->tm_mon = mon - 1;
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date->tm_year = base_year + year - 1900;
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#ifndef __sun__
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date->tm_gmtoff = 0;
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#endif
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ts = mktime(date); |
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} |
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static void check_time(int wiggle) |
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{
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struct tm start, date[4], end; |
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struct tm *datep;
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time_t ts; |
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/*
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* This check assumes a few things. First, we cannot guarantee that we get
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* a consistent reading from the wall clock because we may hit an edge of
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* the clock while reading. To work around this, we read four clock readings
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* such that at least two of them should match. We need to assume that one
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* reading is corrupt so we need four readings to ensure that we have at
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* least two consecutive identical readings
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*
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* It's also possible that we'll cross an edge reading the host clock so
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* simply check to make sure that the clock reading is within the period of
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* when we expect it to be.
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*/
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ts = time(NULL);
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gmtime_r(&ts, &start); |
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cmos_get_date_time(&date[0]);
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cmos_get_date_time(&date[1]);
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cmos_get_date_time(&date[2]);
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cmos_get_date_time(&date[3]);
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ts = time(NULL);
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gmtime_r(&ts, &end); |
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if (tm_cmp(&date[0], &date[1]) == 0) { |
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datep = &date[0];
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} else if (tm_cmp(&date[1], &date[2]) == 0) { |
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datep = &date[1];
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} else if (tm_cmp(&date[2], &date[3]) == 0) { |
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datep = &date[2];
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} else {
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g_assert_not_reached(); |
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} |
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if (!(tm_cmp(&start, datep) <= 0 && tm_cmp(datep, &end) <= 0)) { |
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long t, s;
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start.tm_isdst = datep->tm_isdst; |
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t = (long)mktime(datep);
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s = (long)mktime(&start);
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if (t < s) {
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g_test_message("RTC is %ld second(s) behind wall-clock\n", (s - t));
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} else {
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g_test_message("RTC is %ld second(s) ahead of wall-clock\n", (t - s));
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} |
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g_assert_cmpint(ABS(t - s), <=, wiggle); |
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} |
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} |
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static int wiggle = 2; |
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static void set_year_20xx(void) |
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{
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/* Set BCD mode */
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cmos_write(RTC_REG_B, REG_B_24H); |
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cmos_write(RTC_REG_A, 0x76);
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cmos_write(RTC_YEAR, 0x11);
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cmos_write(RTC_CENTURY, 0x20);
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cmos_write(RTC_MONTH, 0x02);
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cmos_write(RTC_DAY_OF_MONTH, 0x02);
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cmos_write(RTC_HOURS, 0x02);
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cmos_write(RTC_MINUTES, 0x04);
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cmos_write(RTC_SECONDS, 0x58);
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cmos_write(RTC_REG_A, 0x26);
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g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
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g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
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g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
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g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
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if (sizeof(time_t) == 4) { |
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return;
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} |
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/* Set a date in 2080 to ensure there is no year-2038 overflow. */
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cmos_write(RTC_REG_A, 0x76);
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cmos_write(RTC_YEAR, 0x80);
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cmos_write(RTC_REG_A, 0x26);
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g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
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g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
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g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x80);
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g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
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cmos_write(RTC_REG_A, 0x76);
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cmos_write(RTC_YEAR, 0x11);
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cmos_write(RTC_REG_A, 0x26);
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g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
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g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
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g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
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g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
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} |
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|
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static void set_year_1980(void) |
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{
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/* Set BCD mode */
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cmos_write(RTC_REG_B, REG_B_24H); |
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cmos_write(RTC_REG_A, 0x76);
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cmos_write(RTC_YEAR, 0x80);
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cmos_write(RTC_CENTURY, 0x19);
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cmos_write(RTC_MONTH, 0x02);
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cmos_write(RTC_DAY_OF_MONTH, 0x02);
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cmos_write(RTC_HOURS, 0x02);
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cmos_write(RTC_MINUTES, 0x04);
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cmos_write(RTC_SECONDS, 0x58);
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cmos_write(RTC_REG_A, 0x26);
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g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
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g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
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g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
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g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x80);
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g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x19);
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} |
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static void bcd_check_time(void) |
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{
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/* Set BCD mode */
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cmos_write(RTC_REG_B, REG_B_24H); |
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check_time(wiggle); |
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} |
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static void dec_check_time(void) |
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{
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/* Set DEC mode */
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cmos_write(RTC_REG_B, REG_B_24H | REG_B_DM); |
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check_time(wiggle); |
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} |
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static void alarm_time(void) |
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{
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struct tm now;
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time_t ts; |
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int i;
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ts = time(NULL);
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gmtime_r(&ts, &now); |
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/* set DEC mode */
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cmos_write(RTC_REG_B, REG_B_24H | REG_B_DM); |
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g_assert(!get_irq(RTC_ISA_IRQ)); |
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cmos_read(RTC_REG_C); |
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now.tm_sec = (now.tm_sec + 2) % 60; |
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cmos_write(RTC_SECONDS_ALARM, now.tm_sec); |
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cmos_write(RTC_MINUTES_ALARM, RTC_ALARM_DONT_CARE); |
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cmos_write(RTC_HOURS_ALARM, RTC_ALARM_DONT_CARE); |
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cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) | REG_B_AIE); |
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for (i = 0; i < 2 + wiggle; i++) { |
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if (get_irq(RTC_ISA_IRQ)) {
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break;
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} |
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clock_step(1000000000);
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} |
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g_assert(get_irq(RTC_ISA_IRQ)); |
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g_assert((cmos_read(RTC_REG_C) & REG_C_AF) != 0);
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g_assert(cmos_read(RTC_REG_C) == 0);
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} |
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|
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static void set_time(int mode, int h, int m, int s) |
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{
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/* set BCD 12 hour mode */
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cmos_write(RTC_REG_B, mode); |
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cmos_write(RTC_REG_A, 0x76);
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cmos_write(RTC_HOURS, h); |
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cmos_write(RTC_MINUTES, m); |
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cmos_write(RTC_SECONDS, s); |
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cmos_write(RTC_REG_A, 0x26);
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} |
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#define assert_time(h, m, s) \
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do { \
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g_assert_cmpint(cmos_read(RTC_HOURS), ==, h); \ |
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g_assert_cmpint(cmos_read(RTC_MINUTES), ==, m); \ |
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g_assert_cmpint(cmos_read(RTC_SECONDS), ==, s); \ |
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} while(0) |
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|
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static void basic_12h_bcd(void) |
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{
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/* set BCD 12 hour mode */
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set_time(0, 0x81, 0x59, 0x00); |
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clock_step(1000000000LL);
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assert_time(0x81, 0x59, 0x01); |
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clock_step(59000000000LL);
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assert_time(0x82, 0x00, 0x00); |
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|
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/* test BCD wraparound */
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set_time(0, 0x09, 0x59, 0x59); |
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clock_step(60000000000LL);
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assert_time(0x10, 0x00, 0x59); |
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|
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/* 12 AM -> 1 AM */
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set_time(0, 0x12, 0x59, 0x59); |
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clock_step(1000000000LL);
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assert_time(0x01, 0x00, 0x00); |
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|
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/* 12 PM -> 1 PM */
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set_time(0, 0x92, 0x59, 0x59); |
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clock_step(1000000000LL);
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assert_time(0x81, 0x00, 0x00); |
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|
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/* 11 AM -> 12 PM */
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set_time(0, 0x11, 0x59, 0x59); |
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clock_step(1000000000LL);
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assert_time(0x92, 0x00, 0x00); |
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/* TODO: test day wraparound */
|
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|
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/* 11 PM -> 12 AM */
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set_time(0, 0x91, 0x59, 0x59); |
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clock_step(1000000000LL);
|
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assert_time(0x12, 0x00, 0x00); |
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/* TODO: test day wraparound */
|
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} |
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|
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static void basic_12h_dec(void) |
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{
|
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/* set decimal 12 hour mode */
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set_time(REG_B_DM, 0x81, 59, 0); |
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clock_step(1000000000LL);
|
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assert_time(0x81, 59, 1); |
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clock_step(59000000000LL);
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assert_time(0x82, 0, 0); |
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|
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/* 12 PM -> 1 PM */
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set_time(REG_B_DM, 0x8c, 59, 59); |
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clock_step(1000000000LL);
|
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assert_time(0x81, 0, 0); |
| 371 |
|
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/* 12 AM -> 1 AM */
|
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set_time(REG_B_DM, 0x0c, 59, 59); |
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clock_step(1000000000LL);
|
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assert_time(0x01, 0, 0); |
| 376 |
|
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/* 11 AM -> 12 PM */
|
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set_time(REG_B_DM, 0x0b, 59, 59); |
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clock_step(1000000000LL);
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assert_time(0x8c, 0, 0); |
| 381 |
|
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/* 11 PM -> 12 AM */
|
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set_time(REG_B_DM, 0x8b, 59, 59); |
| 384 |
clock_step(1000000000LL);
|
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assert_time(0x0c, 0, 0); |
| 386 |
/* TODO: test day wraparound */
|
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} |
| 388 |
|
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static void basic_24h_bcd(void) |
| 390 |
{
|
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/* set BCD 24 hour mode */
|
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set_time(REG_B_24H, 0x09, 0x59, 0x00); |
| 393 |
clock_step(1000000000LL);
|
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assert_time(0x09, 0x59, 0x01); |
| 395 |
clock_step(59000000000LL);
|
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assert_time(0x10, 0x00, 0x00); |
| 397 |
|
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/* test BCD wraparound */
|
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set_time(REG_B_24H, 0x09, 0x59, 0x00); |
| 400 |
clock_step(60000000000LL);
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assert_time(0x10, 0x00, 0x00); |
| 402 |
|
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/* TODO: test day wraparound */
|
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set_time(REG_B_24H, 0x23, 0x59, 0x00); |
| 405 |
clock_step(60000000000LL);
|
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assert_time(0x00, 0x00, 0x00); |
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} |
| 408 |
|
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static void basic_24h_dec(void) |
| 410 |
{
|
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/* set decimal 24 hour mode */
|
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set_time(REG_B_24H | REG_B_DM, 9, 59, 0); |
| 413 |
clock_step(1000000000LL);
|
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assert_time(9, 59, 1); |
| 415 |
clock_step(59000000000LL);
|
| 416 |
assert_time(10, 0, 0); |
| 417 |
|
| 418 |
/* test BCD wraparound */
|
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set_time(REG_B_24H | REG_B_DM, 9, 59, 0); |
| 420 |
clock_step(60000000000LL);
|
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assert_time(10, 0, 0); |
| 422 |
|
| 423 |
/* TODO: test day wraparound */
|
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set_time(REG_B_24H | REG_B_DM, 23, 59, 0); |
| 425 |
clock_step(60000000000LL);
|
| 426 |
assert_time(0, 0, 0); |
| 427 |
} |
| 428 |
|
| 429 |
static void am_pm_alarm(void) |
| 430 |
{
|
| 431 |
cmos_write(RTC_MINUTES_ALARM, 0xC0);
|
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cmos_write(RTC_SECONDS_ALARM, 0xC0);
|
| 433 |
|
| 434 |
/* set BCD 12 hour mode */
|
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cmos_write(RTC_REG_B, 0);
|
| 436 |
|
| 437 |
/* Set time and alarm hour. */
|
| 438 |
cmos_write(RTC_REG_A, 0x76);
|
| 439 |
cmos_write(RTC_HOURS_ALARM, 0x82);
|
| 440 |
cmos_write(RTC_HOURS, 0x81);
|
| 441 |
cmos_write(RTC_MINUTES, 0x59);
|
| 442 |
cmos_write(RTC_SECONDS, 0x00);
|
| 443 |
cmos_read(RTC_REG_C); |
| 444 |
cmos_write(RTC_REG_A, 0x26);
|
| 445 |
|
| 446 |
/* Check that alarm triggers when AM/PM is set. */
|
| 447 |
clock_step(60000000000LL);
|
| 448 |
g_assert(cmos_read(RTC_HOURS) == 0x82);
|
| 449 |
g_assert((cmos_read(RTC_REG_C) & REG_C_AF) != 0);
|
| 450 |
|
| 451 |
/*
|
| 452 |
* Each of the following two tests takes over 60 seconds due to the time
|
| 453 |
* needed to report the PIT interrupts. Unfortunately, our PIT device
|
| 454 |
* model keeps counting even when GATE=0, so we cannot simply disable
|
| 455 |
* it in main().
|
| 456 |
*/
|
| 457 |
if (g_test_quick()) {
|
| 458 |
return;
|
| 459 |
} |
| 460 |
|
| 461 |
/* set DEC 12 hour mode */
|
| 462 |
cmos_write(RTC_REG_B, REG_B_DM); |
| 463 |
|
| 464 |
/* Set time and alarm hour. */
|
| 465 |
cmos_write(RTC_REG_A, 0x76);
|
| 466 |
cmos_write(RTC_HOURS_ALARM, 0x82);
|
| 467 |
cmos_write(RTC_HOURS, 3);
|
| 468 |
cmos_write(RTC_MINUTES, 0);
|
| 469 |
cmos_write(RTC_SECONDS, 0);
|
| 470 |
cmos_read(RTC_REG_C); |
| 471 |
cmos_write(RTC_REG_A, 0x26);
|
| 472 |
|
| 473 |
/* Check that alarm triggers. */
|
| 474 |
clock_step(3600 * 11 * 1000000000LL); |
| 475 |
g_assert(cmos_read(RTC_HOURS) == 0x82);
|
| 476 |
g_assert((cmos_read(RTC_REG_C) & REG_C_AF) != 0);
|
| 477 |
|
| 478 |
/* Same as above, with inverted HOURS and HOURS_ALARM. */
|
| 479 |
cmos_write(RTC_REG_A, 0x76);
|
| 480 |
cmos_write(RTC_HOURS_ALARM, 2);
|
| 481 |
cmos_write(RTC_HOURS, 3);
|
| 482 |
cmos_write(RTC_MINUTES, 0);
|
| 483 |
cmos_write(RTC_SECONDS, 0);
|
| 484 |
cmos_read(RTC_REG_C); |
| 485 |
cmos_write(RTC_REG_A, 0x26);
|
| 486 |
|
| 487 |
/* Check that alarm does not trigger if hours differ only by AM/PM. */
|
| 488 |
clock_step(3600 * 11 * 1000000000LL); |
| 489 |
g_assert(cmos_read(RTC_HOURS) == 0x82);
|
| 490 |
g_assert((cmos_read(RTC_REG_C) & REG_C_AF) == 0);
|
| 491 |
} |
| 492 |
|
| 493 |
/* success if no crash or abort */
|
| 494 |
static void fuzz_registers(void) |
| 495 |
{
|
| 496 |
unsigned int i; |
| 497 |
|
| 498 |
for (i = 0; i < 1000; i++) { |
| 499 |
uint8_t reg, val; |
| 500 |
|
| 501 |
reg = (uint8_t)g_test_rand_int_range(0, 16); |
| 502 |
val = (uint8_t)g_test_rand_int_range(0, 256); |
| 503 |
|
| 504 |
cmos_write(reg, val); |
| 505 |
cmos_read(reg); |
| 506 |
} |
| 507 |
} |
| 508 |
|
| 509 |
static void register_b_set_flag(void) |
| 510 |
{
|
| 511 |
/* Enable binary-coded decimal (BCD) mode and SET flag in Register B*/
|
| 512 |
cmos_write(RTC_REG_B, REG_B_24H | REG_B_SET); |
| 513 |
|
| 514 |
cmos_write(RTC_REG_A, 0x76);
|
| 515 |
cmos_write(RTC_YEAR, 0x11);
|
| 516 |
cmos_write(RTC_CENTURY, 0x20);
|
| 517 |
cmos_write(RTC_MONTH, 0x02);
|
| 518 |
cmos_write(RTC_DAY_OF_MONTH, 0x02);
|
| 519 |
cmos_write(RTC_HOURS, 0x02);
|
| 520 |
cmos_write(RTC_MINUTES, 0x04);
|
| 521 |
cmos_write(RTC_SECONDS, 0x58);
|
| 522 |
cmos_write(RTC_REG_A, 0x26);
|
| 523 |
|
| 524 |
/* Since SET flag is still enabled, these are equality checks. */
|
| 525 |
g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
|
| 526 |
g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
|
| 527 |
g_assert_cmpint(cmos_read(RTC_SECONDS), ==, 0x58);
|
| 528 |
g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
|
| 529 |
g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
|
| 530 |
g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
|
| 531 |
g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
|
| 532 |
|
| 533 |
/* Disable SET flag in Register B */
|
| 534 |
cmos_write(RTC_REG_B, cmos_read(RTC_REG_B) & ~REG_B_SET); |
| 535 |
|
| 536 |
g_assert_cmpint(cmos_read(RTC_HOURS), ==, 0x02);
|
| 537 |
g_assert_cmpint(cmos_read(RTC_MINUTES), ==, 0x04);
|
| 538 |
|
| 539 |
/* Since SET flag is disabled, this is an inequality check.
|
| 540 |
* We (reasonably) assume that no (sexagesimal) overflow occurs. */
|
| 541 |
g_assert_cmpint(cmos_read(RTC_SECONDS), >=, 0x58);
|
| 542 |
g_assert_cmpint(cmos_read(RTC_DAY_OF_MONTH), ==, 0x02);
|
| 543 |
g_assert_cmpint(cmos_read(RTC_MONTH), ==, 0x02);
|
| 544 |
g_assert_cmpint(cmos_read(RTC_YEAR), ==, 0x11);
|
| 545 |
g_assert_cmpint(cmos_read(RTC_CENTURY), ==, 0x20);
|
| 546 |
} |
| 547 |
|
| 548 |
int main(int argc, char **argv) |
| 549 |
{
|
| 550 |
QTestState *s = NULL;
|
| 551 |
int ret;
|
| 552 |
|
| 553 |
g_test_init(&argc, &argv, NULL);
|
| 554 |
|
| 555 |
s = qtest_start("-display none -rtc clock=vm");
|
| 556 |
qtest_irq_intercept_in(s, "ioapic");
|
| 557 |
|
| 558 |
qtest_add_func("/rtc/check-time/bcd", bcd_check_time);
|
| 559 |
qtest_add_func("/rtc/check-time/dec", dec_check_time);
|
| 560 |
qtest_add_func("/rtc/alarm/interrupt", alarm_time);
|
| 561 |
qtest_add_func("/rtc/alarm/am-pm", am_pm_alarm);
|
| 562 |
qtest_add_func("/rtc/basic/dec-24h", basic_24h_dec);
|
| 563 |
qtest_add_func("/rtc/basic/bcd-24h", basic_24h_bcd);
|
| 564 |
qtest_add_func("/rtc/basic/dec-12h", basic_12h_dec);
|
| 565 |
qtest_add_func("/rtc/basic/bcd-12h", basic_12h_bcd);
|
| 566 |
qtest_add_func("/rtc/set-year/20xx", set_year_20xx);
|
| 567 |
qtest_add_func("/rtc/set-year/1980", set_year_1980);
|
| 568 |
qtest_add_func("/rtc/misc/register_b_set_flag", register_b_set_flag);
|
| 569 |
qtest_add_func("/rtc/misc/fuzz-registers", fuzz_registers);
|
| 570 |
ret = g_test_run(); |
| 571 |
|
| 572 |
if (s) {
|
| 573 |
qtest_quit(s); |
| 574 |
} |
| 575 |
|
| 576 |
return ret;
|
| 577 |
} |