changeset 835a99bdab10 in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=835a99bdab10
description:
RTC: Make calls to writeData update the RTCs internal representation of
time.
diffstat:
1 file changed, 18 insertions(+), 2 deletions(-)
src/dev/mc146818.cc | 20 ++++++++++++++++++--
diffs (38 lines):
diff -r ade9a088bb14 -r 835a99bdab10 src/dev/mc146818.cc
--- a/src/dev/mc146818.cc Thu Aug 20 00:42:43 2009 -0700
+++ b/src/dev/mc146818.cc Thu Aug 20 23:09:03 2009 -0700
@@ -52,6 +52,15 @@
return result;
}
+static uint8_t
+unbcdize(uint8_t val)
+{
+ uint8_t result;
+ result = val & 0xf;
+ result += (val >> 4) * 10;
+ return result;
+}
+
void
MC146818::setTime(const struct tm time)
{
@@ -101,9 +110,16 @@
void
MC146818::writeData(const uint8_t addr, const uint8_t data)
{
- if (addr < RTC_STAT_REGA)
+ if (addr < RTC_STAT_REGA) {
clock_data[addr] = data;
- else {
+ curTime.tm_sec = unbcdize(sec);
+ curTime.tm_min = unbcdize(min);
+ curTime.tm_hour = unbcdize(hour);
+ curTime.tm_mday = unbcdize(mday);
+ curTime.tm_mon = unbcdize(mon) - 1;
+ curTime.tm_year = ((unbcdize(year) + 50) % 100) + 1950;
+ curTime.tm_wday = unbcdize(wday) - 1;
+ } else {
switch (addr) {
case RTC_STAT_REGA:
// The "update in progress" bit is read only.
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