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1.1 root 1: /*
2: * QTest testcase for the M48T59 and M48T08 real-time clocks
3: *
4: * Based on MC146818 RTC test:
5: * Copyright IBM, Corp. 2012
6: *
7: * Authors:
8: * Anthony Liguori <[email protected]>
9: *
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.
12: *
13: */
14: #include "libqtest.h"
15:
16: #include <glib.h>
17: #include <stdio.h>
18: #include <string.h>
19: #include <stdlib.h>
20: #include <unistd.h>
21:
22: #define RTC_SECONDS 0x9
23: #define RTC_MINUTES 0xa
24: #define RTC_HOURS 0xb
25:
26: #define RTC_DAY_OF_WEEK 0xc
27: #define RTC_DAY_OF_MONTH 0xd
28: #define RTC_MONTH 0xe
29: #define RTC_YEAR 0xf
30:
31: static uint32_t base;
32: static uint16_t reg_base = 0x1ff0; /* 0x7f0 for m48t02 */
33: static int base_year;
34: static bool use_mmio;
35:
36: static uint8_t cmos_read_mmio(uint8_t reg)
37: {
38: uint8_t data;
39:
40: memread(base + (uint32_t)reg_base + (uint32_t)reg, &data, 1);
41: return data;
42: }
43:
44: static void cmos_write_mmio(uint8_t reg, uint8_t val)
45: {
46: uint8_t data = val;
47:
48: memwrite(base + (uint32_t)reg_base + (uint32_t)reg, &data, 1);
49: }
50:
51: static uint8_t cmos_read_ioio(uint8_t reg)
52: {
53: outw(base + 0, reg_base + (uint16_t)reg);
54: return inb(base + 3);
55: }
56:
57: static void cmos_write_ioio(uint8_t reg, uint8_t val)
58: {
59: outw(base + 0, reg_base + (uint16_t)reg);
60: outb(base + 3, val);
61: }
62:
63: static uint8_t cmos_read(uint8_t reg)
64: {
65: if (use_mmio) {
66: return cmos_read_mmio(reg);
67: } else {
68: return cmos_read_ioio(reg);
69: }
70: }
71:
72: static void cmos_write(uint8_t reg, uint8_t val)
73: {
74: if (use_mmio) {
75: cmos_write_mmio(reg, val);
76: } else {
77: cmos_write_ioio(reg, val);
78: }
79: }
80:
81: static int bcd2dec(int value)
82: {
83: return (((value >> 4) & 0x0F) * 10) + (value & 0x0F);
84: }
85:
86: static int tm_cmp(struct tm *lhs, struct tm *rhs)
87: {
88: time_t a, b;
89: struct tm d1, d2;
90:
91: memcpy(&d1, lhs, sizeof(d1));
92: memcpy(&d2, rhs, sizeof(d2));
93:
94: a = mktime(&d1);
95: b = mktime(&d2);
96:
97: if (a < b) {
98: return -1;
99: } else if (a > b) {
100: return 1;
101: }
102:
103: return 0;
104: }
105:
106: #if 0
107: static void print_tm(struct tm *tm)
108: {
109: printf("%04d-%02d-%02d %02d:%02d:%02d %+02ld\n",
110: tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
111: tm->tm_hour, tm->tm_min, tm->tm_sec, tm->tm_gmtoff);
112: }
113: #endif
114:
115: static void cmos_get_date_time(struct tm *date)
116: {
117: int sec, min, hour, mday, mon, year;
118: time_t ts;
119: struct tm dummy;
120:
121: sec = cmos_read(RTC_SECONDS);
122: min = cmos_read(RTC_MINUTES);
123: hour = cmos_read(RTC_HOURS);
124: mday = cmos_read(RTC_DAY_OF_MONTH);
125: mon = cmos_read(RTC_MONTH);
126: year = cmos_read(RTC_YEAR);
127:
128: sec = bcd2dec(sec);
129: min = bcd2dec(min);
130: hour = bcd2dec(hour);
131: mday = bcd2dec(mday);
132: mon = bcd2dec(mon);
133: year = bcd2dec(year);
134:
135: ts = time(NULL);
136: localtime_r(&ts, &dummy);
137:
138: date->tm_isdst = dummy.tm_isdst;
139: date->tm_sec = sec;
140: date->tm_min = min;
141: date->tm_hour = hour;
142: date->tm_mday = mday;
143: date->tm_mon = mon - 1;
144: date->tm_year = base_year + year - 1900;
145: date->tm_gmtoff = 0;
146:
147: ts = mktime(date);
148: }
149:
150: static void check_time(int wiggle)
151: {
152: struct tm start, date[4], end;
153: struct tm *datep;
154: time_t ts;
155:
156: /*
157: * This check assumes a few things. First, we cannot guarantee that we get
158: * a consistent reading from the wall clock because we may hit an edge of
159: * the clock while reading. To work around this, we read four clock readings
160: * such that at least two of them should match. We need to assume that one
161: * reading is corrupt so we need four readings to ensure that we have at
162: * least two consecutive identical readings
163: *
164: * It's also possible that we'll cross an edge reading the host clock so
165: * simply check to make sure that the clock reading is within the period of
166: * when we expect it to be.
167: */
168:
169: ts = time(NULL);
170: gmtime_r(&ts, &start);
171:
172: cmos_get_date_time(&date[0]);
173: cmos_get_date_time(&date[1]);
174: cmos_get_date_time(&date[2]);
175: cmos_get_date_time(&date[3]);
176:
177: ts = time(NULL);
178: gmtime_r(&ts, &end);
179:
180: if (tm_cmp(&date[0], &date[1]) == 0) {
181: datep = &date[0];
182: } else if (tm_cmp(&date[1], &date[2]) == 0) {
183: datep = &date[1];
184: } else if (tm_cmp(&date[2], &date[3]) == 0) {
185: datep = &date[2];
186: } else {
187: g_assert_not_reached();
188: }
189:
190: if (!(tm_cmp(&start, datep) <= 0 && tm_cmp(datep, &end) <= 0)) {
191: long t, s;
192:
193: start.tm_isdst = datep->tm_isdst;
194:
195: t = (long)mktime(datep);
196: s = (long)mktime(&start);
197: if (t < s) {
198: g_test_message("RTC is %ld second(s) behind wall-clock\n", (s - t));
199: } else {
200: g_test_message("RTC is %ld second(s) ahead of wall-clock\n", (t - s));
201: }
202:
203: g_assert_cmpint(ABS(t - s), <=, wiggle);
204: }
205: }
206:
207: static int wiggle = 2;
208:
209: static void bcd_check_time(void)
210: {
211: if (strcmp(qtest_get_arch(), "sparc64") == 0) {
212: base = 0x74;
213: base_year = 1900;
214: use_mmio = false;
215: } else if (strcmp(qtest_get_arch(), "sparc") == 0) {
216: base = 0x71200000;
217: base_year = 1968;
218: use_mmio = true;
219: } else { /* PPC: need to map macio in PCI */
220: g_assert_not_reached();
221: }
222: check_time(wiggle);
223: }
224:
225: /* success if no crash or abort */
226: static void fuzz_registers(void)
227: {
228: unsigned int i;
229:
230: for (i = 0; i < 1000; i++) {
231: uint8_t reg, val;
232:
233: reg = (uint8_t)g_test_rand_int_range(0, 16);
234: val = (uint8_t)g_test_rand_int_range(0, 256);
235:
236: cmos_write(reg, val);
237: cmos_read(reg);
238: }
239: }
240:
241: int main(int argc, char **argv)
242: {
243: QTestState *s = NULL;
244: int ret;
245:
246: g_test_init(&argc, &argv, NULL);
247:
248: s = qtest_start("-display none -rtc clock=vm");
249:
250: qtest_add_func("/rtc/bcd/check-time", bcd_check_time);
251: qtest_add_func("/rtc/fuzz-registers", fuzz_registers);
252: ret = g_test_run();
253:
254: if (s) {
255: qtest_quit(s);
256: }
257:
258: return ret;
259: }
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