1 files changed, 269 insertions, 0 deletions
diff --git a/tests/qtest/m48t59-test.c b/tests/qtest/m48t59-test.c
new file mode 100644
index 0000000000..b94a1230f7
--- /dev/null
+++ b/tests/qtest/m48t59-test.c
@@ -0,0 +1,269 @@
+/*
+ * 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;
+#ifndef __sun__
+    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();
+}