diff options
Diffstat (limited to 'src/dev/alpha/tsunami_io.cc')
-rw-r--r-- | src/dev/alpha/tsunami_io.cc | 82 |
1 files changed, 69 insertions, 13 deletions
diff --git a/src/dev/alpha/tsunami_io.cc b/src/dev/alpha/tsunami_io.cc index 38986b77e..d701dc98f 100644 --- a/src/dev/alpha/tsunami_io.cc +++ b/src/dev/alpha/tsunami_io.cc @@ -57,25 +57,77 @@ using namespace std; //Should this be AlphaISA? using namespace TheISA; -TsunamiIO::RTC::RTC(const string &n, Tsunami* tsunami, time_t t, Tick i) - : _name(n), event(tsunami, i), addr(0) +TsunamiIO::RTC::RTC(const string &n, Tsunami* tsunami, const vector<int> &t, + bool bcd, Tick i) + : _name(n), event(tsunami, i), addr(0), year_is_bcd(bcd) { memset(clock_data, 0, sizeof(clock_data)); stat_regA = RTCA_32768HZ | RTCA_1024HZ; stat_regB = RTCB_PRDC_IE |RTCB_BIN | RTCB_24HR; + if (year_is_bcd) { + // The RTC uses BCD for the last two digits in the year. + // They python year is a full year. + int _year = t[0] % 100; + int tens = _year / 10; + int ones = _year % 10; + + year = (tens << 4) + ones; + } else { + // Even though the datasheet says that the year field should be + // interpreted as BCD, we just enter the number of years since + // 1900 since linux seems to be happy with that (and I believe + // that Tru64 was as well) + year = t[0] - 1900; + } + + mon = t[1]; + mday = t[2]; + hour = t[3]; + min = t[4]; + sec = t[5]; + + // wday is defined to be in the range from 1 - 7 with 1 being Sunday. + // the value coming from python is in the range from 0 - 6 with 0 being + // Monday. Fix that here. + wday = t[6] + 2; + if (wday > 7) + wday -= 7; + + DPRINTFN("Real-time clock set to %s", getDateString()); +} + +std::string +TsunamiIO::RTC::getDateString() +{ struct tm tm; - gmtime_r(&t, &tm); - sec = tm.tm_sec; - min = tm.tm_min; - hour = tm.tm_hour; - wday = tm.tm_wday + 1; - mday = tm.tm_mday; - mon = tm.tm_mon + 1; - year = tm.tm_year; + memset(&tm, 0, sizeof(tm)); + + if (year_is_bcd) { + // undo the BCD and conver to years since 1900 guessing that + // anything before 1970 is actually after 2000 + int _year = (year >> 4) * 10 + (year & 0xf); + if (_year < 70) + _year += 100; + + tm.tm_year = _year; + } else { + // number of years since 1900 + tm.tm_year = year; + } + + // unix is 0-11 for month + tm.tm_mon = mon - 1; + tm.tm_mday = mday; + tm.tm_hour = hour; + tm.tm_min = min; + tm.tm_sec = sec; + + // to add more annoyance unix is 0 - 6 with 0 as sunday + tm.tm_wday = wday - 1; - DPRINTFN("Real-time clock set to %s", asctime(&tm)); + return asctime(&tm); } void @@ -424,7 +476,8 @@ TsunamiIO::PITimer::Counter::CounterEvent::description() TsunamiIO::TsunamiIO(Params *p) : BasicPioDevice(p), tsunami(p->tsunami), pitimer(p->name + "pitimer"), - rtc(p->name + ".rtc", p->tsunami, p->init_time, p->frequency) + rtc(p->name + ".rtc", p->tsunami, p->init_time, p->year_is_bcd, + p->frequency) { pioSize = 0x100; @@ -649,7 +702,8 @@ BEGIN_DECLARE_SIM_OBJECT_PARAMS(TsunamiIO) Param<Tick> frequency; SimObjectParam<Platform *> platform; SimObjectParam<System *> system; - Param<time_t> time; + VectorParam<int> time; + Param<bool> year_is_bcd; SimObjectParam<Tsunami *> tsunami; END_DECLARE_SIM_OBJECT_PARAMS(TsunamiIO) @@ -662,6 +716,7 @@ BEGIN_INIT_SIM_OBJECT_PARAMS(TsunamiIO) INIT_PARAM(platform, "platform"), INIT_PARAM(system, "system object"), INIT_PARAM(time, "System time to use (0 for actual time"), + INIT_PARAM(year_is_bcd, ""), INIT_PARAM(tsunami, "Tsunami") END_INIT_SIM_OBJECT_PARAMS(TsunamiIO) @@ -676,6 +731,7 @@ CREATE_SIM_OBJECT(TsunamiIO) p->platform = platform; p->system = system; p->init_time = time; + p->year_is_bcd = year_is_bcd; p->tsunami = tsunami; return new TsunamiIO(p); } |