qemu

m48t59-test.c (6617B)

---

 /*
  * QTest testcase for the M48T59 and M48T08 real-time clocks
  *
  * Based on MC146818 RTC test:
  * Copyright IBM, Corp. 2012
  *
  * Authors:
  *  Anthony Liguori   <aliguori@us.ibm.com>
  *
  * 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 "qemu/osdep.h"
 
 #include "libqtest.h"
 
 #define RTC_SECONDS             0x9
 #define RTC_MINUTES             0xa
 #define RTC_HOURS               0xb
 
 #define RTC_DAY_OF_WEEK         0xc
 #define RTC_DAY_OF_MONTH        0xd
 #define RTC_MONTH               0xe
 #define RTC_YEAR                0xf
 
 static uint32_t base;
 static uint16_t reg_base = 0x1ff0; /* 0x7f0 for m48t02 */
 static int base_year;
 static const char *base_machine;
 static bool use_mmio;
 
 static uint8_t cmos_read_mmio(QTestState *s, uint8_t reg)
 {
     return qtest_readb(s, base + (uint32_t)reg_base + (uint32_t)reg);
 }
 
 static void cmos_write_mmio(QTestState *s, uint8_t reg, uint8_t val)
 {
     uint8_t data = val;
 
     qtest_writeb(s, base + (uint32_t)reg_base + (uint32_t)reg, data);
 }
 
 static uint8_t cmos_read_ioio(QTestState *s, uint8_t reg)
 {
     qtest_outw(s, base + 0, reg_base + (uint16_t)reg);
     return qtest_inb(s, base + 3);
 }
 
 static void cmos_write_ioio(QTestState *s, uint8_t reg, uint8_t val)
 {
     qtest_outw(s, base + 0, reg_base + (uint16_t)reg);
     qtest_outb(s, base + 3, val);
 }
 
 static uint8_t cmos_read(QTestState *s, uint8_t reg)
 {
     if (use_mmio) {
         return cmos_read_mmio(s, reg);
     } else {
         return cmos_read_ioio(s, reg);
     }
 }
 
 static void cmos_write(QTestState *s, uint8_t reg, uint8_t val)
 {
     if (use_mmio) {
         cmos_write_mmio(s, reg, val);
     } else {
         cmos_write_ioio(s, reg, val);
     }
 }
 
 static int bcd2dec(int value)
 {
     return (((value >> 4) & 0x0F) * 10) + (value & 0x0F);
 }
 
 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 %+02ld\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(QTestState *s, struct tm *date)
 {
     int sec, min, hour, mday, mon, year;
     time_t ts;
     struct tm dummy;
 
     sec = cmos_read(s, RTC_SECONDS);
     min = cmos_read(s, RTC_MINUTES);
     hour = cmos_read(s, RTC_HOURS);
     mday = cmos_read(s, RTC_DAY_OF_MONTH);
     mon = cmos_read(s, RTC_MONTH);
     year = cmos_read(s, RTC_YEAR);
 
     sec = bcd2dec(sec);
     min = bcd2dec(min);
     hour = bcd2dec(hour);
     mday = bcd2dec(mday);
     mon = bcd2dec(mon);
     year = bcd2dec(year);
 
     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;
 #if !defined(__sun__) && !defined(_WIN32)
     date->tm_gmtoff = 0;
 #endif
 
     ts = mktime(date);
 }
 
 static QTestState *m48t59_qtest_start(void)
 {
     return qtest_initf("-M %s -rtc clock=vm", base_machine);
 }
 
 static void bcd_check_time(void)
 {
     struct tm start, date[4], end;
     struct tm *datep;
     time_t ts;
     const int wiggle = 2;
     QTestState *s = m48t59_qtest_start();
 
     /*
      * 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(s, &date[0]);
     cmos_get_date_time(s, &date[1]);
     cmos_get_date_time(s, &date[2]);
     cmos_get_date_time(s, &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", (s - t));
         } else {
             g_test_message("RTC is %ld second(s) ahead of wall-clock", (t - s));
         }
 
         g_assert_cmpint(ABS(t - s), <=, wiggle);
     }
 
     qtest_quit(s);
 }
 
 /* success if no crash or abort */
 static void fuzz_registers(void)
 {
     unsigned int i;
     QTestState *s = m48t59_qtest_start();
 
     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);
 
         if (reg == 7) {
             /* watchdog setup register, may trigger system reset, skip */
             continue;
         }
 
         cmos_write(s, reg, val);
         cmos_read(s, reg);
     }
 
     qtest_quit(s);
 }
 
 static void base_setup(void)
 {
     const char *arch = qtest_get_arch();
 
     if (g_str_equal(arch, "sparc")) {
         /* Note: For sparc64, we'd need to map-in the PCI bridge memory first */
         base = 0x71200000;
         base_year = 1968;
         base_machine = "SS-5";
         use_mmio = true;
     } else if (g_str_equal(arch, "ppc") || g_str_equal(arch, "ppc64")) {
         base = 0xF0000000;
         base_year = 1968;
         base_machine = "ref405ep";
         use_mmio = true;
     } else {
         g_assert_not_reached();
     }
 }
 
 int main(int argc, char **argv)
 {
     base_setup();
 
     g_test_init(&argc, &argv, NULL);
 
     if (g_test_slow()) {
         /* Do not run this in timing-sensitive environments */
         qtest_add_func("/rtc/bcd-check-time", bcd_check_time);
     }
     qtest_add_func("/rtc/fuzz-registers", fuzz_registers);
     return g_test_run();
 }