1 files changed, 19 insertions, 0 deletions
diff --git a/include/hw/s390x/tod.h b/include/hw/s390x/tod.h
index 7096b574ae..413c0d7c02 100644
--- a/include/hw/s390x/tod.h
+++ b/include/hw/s390x/tod.h
@@ -30,6 +30,9 @@ typedef struct S390TOD {
 typedef struct S390TODState {
     /* private */
     DeviceState parent_obj;
+
+    /* unused by KVM implementation */
+    S390TOD base;
 } S390TODState;
 
 typedef struct S390TODClass {
@@ -41,6 +44,22 @@ typedef struct S390TODClass {
     void (*set)(S390TODState *td, const S390TOD *tod, Error **errp);
 } S390TODClass;
 
+/* The value of the TOD clock for 1.1.1970. */
+#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
+
+/* Converts ns to s390's clock format */
+static inline uint64_t time2tod(uint64_t ns)
+{
+    return (ns << 9) / 125 + (((ns & 0xff10000000000000ull) / 125) << 9);
+}
+
+/* Converts s390's clock format to ns */
+static inline uint64_t tod2time(uint64_t t)
+{
+    return ((t >> 9) * 125) + (((t & 0x1ff) * 125) >> 9);
+}
+
 void s390_init_tod(void);
+S390TODState *s390_get_todstate(void);
 
 #endif