[Qemu-devel] [PATCH] move date/time initialization into mc146818rtc.c

[Qemu-devel] [PATCH] move date/time initialization into mc146818rtc.c

[Aurelien Jarno]

The patch below moves the initialisation of the RTC date/time, currently
into hw/pc.c into hw/mc146818rtc.c as this part of the initialization
is not guest specific. This avoid duplication of code in (future)
platforms emulation.

-- 
  .''`.  Aurelien Jarno	            | GPG: 1024D/F1BCDB73
 : :' :  Debian developer           | Electrical Engineer
 `. `'   aurel32@debian.org         | aurelien@aurel32.net
   `-    people.debian.org/~aurel32 | www.aurel32.net


Index: mc146818rtc.c
===================================================================
RCS file: /sources/qemu/qemu/hw/mc146818rtc.c,v
retrieving revision 1.6
diff -u -d -p -r1.6 mc146818rtc.c
--- mc146818rtc.c	3 Jun 2004 12:51:19 -0000	1.6
+++ mc146818rtc.c	18 Nov 2006 21:26:38 -0000
@@ -380,6 +380,29 @@ void rtc_set_date(RTCState *s, const str
     rtc_copy_date(s);
 }
 
+/* PC cmos mappings */
+#define REG_IBM_CENTURY_BYTE        0x32
+#define REG_IBM_PS2_CENTURY_BYTE    0x37
+
+void rtc_set_date_from_host(RTCState *s)
+{
+    time_t ti;
+    struct tm *tm;
+    int val;
+
+    /* set the CMOS date */
+    time(&ti);
+    if (rtc_utc)
+        tm = gmtime(&ti);
+    else
+        tm = localtime(&ti);
+    rtc_set_date(s, tm);
+
+    val = to_bcd(s, (tm->tm_year / 100) + 19);
+    rtc_set_memory(s, REG_IBM_CENTURY_BYTE, val);
+    rtc_set_memory(s, REG_IBM_PS2_CENTURY_BYTE, val);
+}
+
 static void rtc_save(QEMUFile *f, void *opaque)
 {
     RTCState *s = opaque;
@@ -444,6 +467,8 @@ RTCState *rtc_init(int base, int irq)
     s->cmos_data[RTC_REG_C] = 0x00;
     s->cmos_data[RTC_REG_D] = 0x80;
 
+    rtc_set_date_from_host(s);
+
     s->periodic_timer = qemu_new_timer(vm_clock, 
                                        rtc_periodic_timer, s);
     s->second_timer = qemu_new_timer(vm_clock, 
Index: pc.c
===================================================================
RCS file: /sources/qemu/qemu/hw/pc.c,v
retrieving revision 1.62
diff -u -d -p -r1.62 pc.c
--- pc.c	24 Sep 2006 18:48:00 -0000	1.62
+++ pc.c	18 Nov 2006 21:26:38 -0000
@@ -111,14 +111,6 @@ static void pic_irq_request(void *opaque
 /* PC cmos mappings */
 
 #define REG_EQUIPMENT_BYTE          0x14
-#define REG_IBM_CENTURY_BYTE        0x32
-#define REG_IBM_PS2_CENTURY_BYTE    0x37
-
-
-static inline int to_bcd(RTCState *s, int a)
-{
-    return ((a / 10) << 4) | (a % 10);
-}
 
 static int cmos_get_fd_drive_type(int fd0)
 {
@@ -171,18 +163,6 @@ static void cmos_init(int ram_size, int 
     struct tm *tm;
     int i;
 
-    /* set the CMOS date */
-    time(&ti);
-    if (rtc_utc)
-        tm = gmtime(&ti);
-    else
-        tm = localtime(&ti);
-    rtc_set_date(s, tm);
-
-    val = to_bcd(s, (tm->tm_year / 100) + 19);
-    rtc_set_memory(s, REG_IBM_CENTURY_BYTE, val);
-    rtc_set_memory(s, REG_IBM_PS2_CENTURY_BYTE, val);
-
     /* various important CMOS locations needed by PC/Bochs bios */
 
     /* memory size */