3 files changed, 67 insertions, 58 deletions

diff --git a/arch/ppc64/kernel/mf.c b/arch/ppc64/kernel/mf.c
index 1bd52ece497c..5aca7e8005a8 100644
--- a/arch/ppc64/kernel/mf.c
+++ b/arch/ppc64/kernel/mf.c
@@ -1,7 +1,7 @@
 /*
   * mf.c
   * Copyright (C) 2001 Troy D. Armstrong  IBM Corporation
-  * Copyright (C) 2004 Stephen Rothwell  IBM Corporation
+  * Copyright (C) 2004-2005 Stephen Rothwell  IBM Corporation
   *
   * This modules exists as an interface between a Linux secondary partition
   * running on an iSeries and the primary partition's Virtual Service
@@ -36,10 +36,12 @@
 
 #include <asm/time.h>
 #include <asm/uaccess.h>
+#include <asm/paca.h>
 #include <asm/iSeries/vio.h>
 #include <asm/iSeries/mf.h>
 #include <asm/iSeries/HvLpConfig.h>
 #include <asm/iSeries/ItSpCommArea.h>
+#include <asm/iSeries/ItLpQueue.h>
 
 /*
  * This is the structure layout for the Machine Facilites LPAR event
@@ -696,36 +698,23 @@ static void get_rtc_time_complete(void *token, struct ce_msg_data *ce_msg)
         complete(&rtc->com);
 }
 
-int mf_get_rtc(struct rtc_time *tm)
+static int rtc_set_tm(int rc, u8 *ce_msg, struct rtc_time *tm)
 {
-        struct ce_msg_comp_data ce_complete;
-        struct rtc_time_data rtc_data;
-        int rc;
-
-        memset(&ce_complete, 0, sizeof(ce_complete));
-        memset(&rtc_data, 0, sizeof(rtc_data));
-        init_completion(&rtc_data.com);
-        ce_complete.handler = &get_rtc_time_complete;
-        ce_complete.token = &rtc_data;
-        rc = signal_ce_msg_simple(0x40, &ce_complete);
-        if (rc)
-                return rc;
-        wait_for_completion(&rtc_data.com);
         tm->tm_wday = 0;
         tm->tm_yday = 0;
         tm->tm_isdst = 0;
-        if (rtc_data.rc) {
+        if (rc) {
                 tm->tm_sec = 0;
                 tm->tm_min = 0;
                 tm->tm_hour = 0;
                 tm->tm_mday = 15;
                 tm->tm_mon = 5;
                 tm->tm_year = 52;
-                return rtc_data.rc;
+                return rc;
         }
 
-        if ((rtc_data.ce_msg.ce_msg[2] == 0xa9) ||
-            (rtc_data.ce_msg.ce_msg[2] == 0xaf)) {
+        if ((ce_msg[2] == 0xa9) ||
+            (ce_msg[2] == 0xaf)) {
                 /* TOD clock is not set */
                 tm->tm_sec = 1;
                 tm->tm_min = 1;
@@ -736,7 +725,6 @@ int mf_get_rtc(struct rtc_time *tm)
                 mf_set_rtc(tm);
         }
         {
-                u8 *ce_msg = rtc_data.ce_msg.ce_msg;
                 u8 year = ce_msg[5];
                 u8 sec = ce_msg[6];
                 u8 min = ce_msg[7];
@@ -765,6 +753,63 @@ int mf_get_rtc(struct rtc_time *tm)
         return 0;
 }
 
+int mf_get_rtc(struct rtc_time *tm)
+{
+        struct ce_msg_comp_data ce_complete;
+        struct rtc_time_data rtc_data;
+        int rc;
+
+        memset(&ce_complete, 0, sizeof(ce_complete));
+        memset(&rtc_data, 0, sizeof(rtc_data));
+        init_completion(&rtc_data.com);
+        ce_complete.handler = &get_rtc_time_complete;
+        ce_complete.token = &rtc_data;
+        rc = signal_ce_msg_simple(0x40, &ce_complete);
+        if (rc)
+                return rc;
+        wait_for_completion(&rtc_data.com);
+        return rtc_set_tm(rtc_data.rc, rtc_data.ce_msg.ce_msg, tm);
+}
+
+struct boot_rtc_time_data {
+        int busy;
+        struct ce_msg_data ce_msg;
+        int rc;
+};
+
+static void get_boot_rtc_time_complete(void *token, struct ce_msg_data *ce_msg)
+{
+        struct boot_rtc_time_data *rtc = token;
+
+        memcpy(&rtc->ce_msg, ce_msg, sizeof(rtc->ce_msg));
+        rtc->rc = 0;
+        rtc->busy = 0;
+}
+
+int mf_get_boot_rtc(struct rtc_time *tm)
+{
+        struct ce_msg_comp_data ce_complete;
+        struct boot_rtc_time_data rtc_data;
+        int rc;
+
+        memset(&ce_complete, 0, sizeof(ce_complete));
+        memset(&rtc_data, 0, sizeof(rtc_data));
+        rtc_data.busy = 1;
+        ce_complete.handler = &get_boot_rtc_time_complete;
+        ce_complete.token = &rtc_data;
+        rc = signal_ce_msg_simple(0x40, &ce_complete);
+        if (rc)
+                return rc;
+        /* We need to poll here as we are not yet taking interrupts */
+        while (rtc_data.busy) {
+                extern unsigned long lpevent_count;
+                struct ItLpQueue *lpq = get_paca()->lpqueue_ptr;
+                if (lpq && ItLpQueue_isLpIntPending(lpq))
+                        lpevent_count += ItLpQueue_process(lpq, NULL);
+        }
+        return rtc_set_tm(rtc_data.rc, rtc_data.ce_msg.ce_msg, tm);
+}
+
 int mf_set_rtc(struct rtc_time *tm)
 {
         char ce_time[12];
diff --git a/arch/ppc64/kernel/rtc.c b/arch/ppc64/kernel/rtc.c
index 3e70b91375fc..67989055a9fe 100644
--- a/arch/ppc64/kernel/rtc.c
+++ b/arch/ppc64/kernel/rtc.c
@@ -292,47 +292,10 @@ int iSeries_set_rtc_time(struct rtc_time *tm)
 
 void iSeries_get_boot_time(struct rtc_time *tm)
 {
-        unsigned long time;
-        static unsigned long lastsec = 1;
-
-        u32 dataWord1 = *((u32 *)(&xSpCommArea.xBcdTimeAtIplStart));
-        u32 dataWord2 = *(((u32 *)&(xSpCommArea.xBcdTimeAtIplStart)) + 1);
-        int year = 1970;
-        int year1 = ( dataWord1 >> 24 ) & 0x000000FF;
-        int year2 = ( dataWord1 >> 16 ) & 0x000000FF;
-        int sec = ( dataWord1 >> 8 ) & 0x000000FF;
-        int min = dataWord1 & 0x000000FF;
-        int hour = ( dataWord2 >> 24 ) & 0x000000FF;
-        int day = ( dataWord2 >> 8 ) & 0x000000FF;
-        int mon = dataWord2 & 0x000000FF;
-
         if ( piranha_simulator )
                 return;
 
-        BCD_TO_BIN(sec);
-        BCD_TO_BIN(min);
-        BCD_TO_BIN(hour);
-        BCD_TO_BIN(day);
-        BCD_TO_BIN(mon);
-        BCD_TO_BIN(year1);
-        BCD_TO_BIN(year2);
-        year = year1 * 100 + year2;
-
-        time = mktime(year, mon, day, hour, min, sec);
-        time += ( jiffies / HZ );
-
-        /* Now THIS is a nasty hack!
-        * It ensures that the first two calls get different answers.  
-        * That way the loop in init_time (time.c) will not think
-        * the clock is stuck.
-        */
-        if ( lastsec ) {
-                time -= lastsec;
-                --lastsec;
-        }
-
-        to_tm(time, tm); 
-        tm->tm_year -= 1900;
+        mf_get_boot_rtc(tm);
         tm->tm_mon  -= 1;
 }
 #endif
diff --git a/include/asm-ppc64/iSeries/mf.h b/include/asm-ppc64/iSeries/mf.h
index 2e59a8e15a0b..db333e1ee216 100644
--- a/include/asm-ppc64/iSeries/mf.h
+++ b/include/asm-ppc64/iSeries/mf.h
@@ -52,6 +52,7 @@ extern void mf_clear_src(void);
 extern void mf_init(void);
 
 extern int mf_get_rtc(struct rtc_time *tm);
+extern int mf_get_boot_rtc(struct rtc_time *tm);
 extern int mf_set_rtc(struct rtc_time *tm);
 
 #endif /* _ASM_PPC64_ISERIES_MF_H */