2 * QTest testcase for the M48T59 and M48T08 real-time clocks
4 * Based on MC146818 RTC test:
5 * Copyright IBM, Corp. 2012
10 * This work is licensed under the terms of the GNU GPL, version 2 or later.
11 * See the COPYING file in the top-level directory.
15 #include "qemu/osdep.h"
20 #define RTC_SECONDS 0x9
21 #define RTC_MINUTES 0xa
24 #define RTC_DAY_OF_WEEK 0xc
25 #define RTC_DAY_OF_MONTH 0xd
30 static uint16_t reg_base = 0x1ff0; /* 0x7f0 for m48t02 */
34 static uint8_t cmos_read_mmio(uint8_t reg)
36 return readb(base + (uint32_t)reg_base + (uint32_t)reg);
39 static void cmos_write_mmio(uint8_t reg, uint8_t val)
43 writeb(base + (uint32_t)reg_base + (uint32_t)reg, data);
46 static uint8_t cmos_read_ioio(uint8_t reg)
48 outw(base + 0, reg_base + (uint16_t)reg);
52 static void cmos_write_ioio(uint8_t reg, uint8_t val)
54 outw(base + 0, reg_base + (uint16_t)reg);
58 static uint8_t cmos_read(uint8_t reg)
61 return cmos_read_mmio(reg);
63 return cmos_read_ioio(reg);
67 static void cmos_write(uint8_t reg, uint8_t val)
70 cmos_write_mmio(reg, val);
72 cmos_write_ioio(reg, val);
76 static int bcd2dec(int value)
78 return (((value >> 4) & 0x0F) * 10) + (value & 0x0F);
81 static int tm_cmp(struct tm *lhs, struct tm *rhs)
86 memcpy(&d1, lhs, sizeof(d1));
87 memcpy(&d2, rhs, sizeof(d2));
102 static void print_tm(struct tm *tm)
104 printf("%04d-%02d-%02d %02d:%02d:%02d %+02ld\n",
105 tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
106 tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_gmtoff);
110 static void cmos_get_date_time(struct tm *date)
112 int sec, min, hour, mday, mon, year;
116 sec = cmos_read(RTC_SECONDS);
117 min = cmos_read(RTC_MINUTES);
118 hour = cmos_read(RTC_HOURS);
119 mday = cmos_read(RTC_DAY_OF_MONTH);
120 mon = cmos_read(RTC_MONTH);
121 year = cmos_read(RTC_YEAR);
125 hour = bcd2dec(hour);
126 mday = bcd2dec(mday);
128 year = bcd2dec(year);
131 localtime_r(&ts, &dummy);
133 date->tm_isdst = dummy.tm_isdst;
136 date->tm_hour = hour;
137 date->tm_mday = mday;
138 date->tm_mon = mon - 1;
139 date->tm_year = base_year + year - 1900;
147 static void check_time(int wiggle)
149 struct tm start, date[4], end;
154 * This check assumes a few things. First, we cannot guarantee that we get
155 * a consistent reading from the wall clock because we may hit an edge of
156 * the clock while reading. To work around this, we read four clock readings
157 * such that at least two of them should match. We need to assume that one
158 * reading is corrupt so we need four readings to ensure that we have at
159 * least two consecutive identical readings
161 * It's also possible that we'll cross an edge reading the host clock so
162 * simply check to make sure that the clock reading is within the period of
163 * when we expect it to be.
167 gmtime_r(&ts, &start);
169 cmos_get_date_time(&date[0]);
170 cmos_get_date_time(&date[1]);
171 cmos_get_date_time(&date[2]);
172 cmos_get_date_time(&date[3]);
177 if (tm_cmp(&date[0], &date[1]) == 0) {
179 } else if (tm_cmp(&date[1], &date[2]) == 0) {
181 } else if (tm_cmp(&date[2], &date[3]) == 0) {
184 g_assert_not_reached();
187 if (!(tm_cmp(&start, datep) <= 0 && tm_cmp(datep, &end) <= 0)) {
190 start.tm_isdst = datep->tm_isdst;
192 t = (long)mktime(datep);
193 s = (long)mktime(&start);
195 g_test_message("RTC is %ld second(s) behind wall-clock\n", (s - t));
197 g_test_message("RTC is %ld second(s) ahead of wall-clock\n", (t - s));
200 g_assert_cmpint(ABS(t - s), <=, wiggle);
204 static int wiggle = 2;
206 static void bcd_check_time(void)
208 if (strcmp(qtest_get_arch(), "sparc64") == 0) {
212 } else if (strcmp(qtest_get_arch(), "sparc") == 0) {
216 } else { /* PPC: need to map macio in PCI */
217 g_assert_not_reached();
222 /* success if no crash or abort */
223 static void fuzz_registers(void)
227 for (i = 0; i < 1000; i++) {
230 reg = (uint8_t)g_test_rand_int_range(0, 16);
231 val = (uint8_t)g_test_rand_int_range(0, 256);
234 /* watchdog setup register, may trigger system reset, skip */
238 cmos_write(reg, val);
243 int main(int argc, char **argv)
245 QTestState *s = NULL;
248 g_test_init(&argc, &argv, NULL);
250 s = qtest_start("-rtc clock=vm");
252 qtest_add_func("/rtc/bcd/check-time", bcd_check_time);
253 qtest_add_func("/rtc/fuzz-registers", fuzz_registers);