Changeset 83298e8 in mainline for uspace/drv/time/cmos-rtc/cmos-rtc.c

Timestamp:

2012-08-16T21:35:20Z (12 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

4f351432

Parents:

16639bb

Message:

rtc: make use of the getuptime() function

File:

• uspace/drv/time/cmos-rtc/cmos-rtc.c (modified) (3 diffs)

uspace/drv/time/cmos-rtc/cmos-rtc.c

@@ -51 +51 @@
 #include <macros.h>
 #include <ipc/clock_ctl.h>
+#include <time.h>
 
 #include "cmos-regs.h"
@@ -75 +76 @@
         bool removed;
 } rtc_t;
-
-/** Pointer to the kernel shared variables with time */
-struct {
-        volatile sysarg_t seconds1;
-        volatile sysarg_t useconds;
-        volatile sysarg_t seconds2;
-} *kuptime = NULL;
 
 static int  rtc_time_get(ddf_fun_t *fun, struct tm *t);
@@ -650 +644 @@
 }
 
-/** Get the current uptime
- *
- * The time variables are memory mapped (read-only) from kernel which
- * updates them periodically.
- *
- * As it is impossible to read 2 values atomically, we use a trick:
- * First we read the seconds, then we read the microseconds, then we
- * read the seconds again. If a second elapsed in the meantime, set
- * the microseconds to zero.
- *
- * This assures that the values returned by two subsequent calls
- * to gettimeofday() are monotonous.
- *
- */
 static time_t
 uptime_get(void)
 {
-        if (kuptime == NULL) {
-                uintptr_t faddr;
-                int rc = sysinfo_get_value("clock.faddr", &faddr);
-                if (rc != EOK) {
-                        errno = rc;
-                        return -1;
-                }
-                
-                void *addr;
-                rc = physmem_map((void *) faddr, 1,
-                    AS_AREA_READ | AS_AREA_CACHEABLE, &addr);
-                if (rc != EOK) {
-                        as_area_destroy(addr);
-                        errno = rc;
-                        return -1;
-                }
-                
-                kuptime = addr;
-        }
-
-        sysarg_t s2 = kuptime->seconds2;
-        
-        read_barrier();
-        sysarg_t s1 = kuptime->seconds1;
-        
-        return max(s1, s2);
+        struct timeval tv;
+
+        getuptime(&tv);
+
+        return tv.tv_sec;
 }