pc-bios/s390-ccw: add utility functions and "export" some others

Add several utility functions, make IPL_check and IPL_assert generally
available, etc.

Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

3 files changed, 40 insertions, 19 deletions

diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h
index e074587665..bea168714b 100644
--- a/pc-bios/s390-ccw/bootmap.h
+++ b/pc-bios/s390-ccw/bootmap.h
@@ -264,24 +264,6 @@ typedef enum {
 
 /* utility code below */
 
-static inline void IPL_assert(bool term, const char *message)
-{
-    if (!term) {
-        sclp_print("\n! ");
-        sclp_print(message);
-        panic(" !\n"); /* no return */
-    }
-}
-
-static inline void IPL_check(bool term, const char *message)
-{
-    if (!term) {
-        sclp_print("\n! WARNING: ");
-        sclp_print(message);
-        sclp_print(" !\n");
-    }
-}
-
 static const unsigned char ebc2asc[256] =
       /* 0123456789abcdef0123456789abcdef */
         "................................" /* 1F */
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index c24f7202e4..51359113ae 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -67,6 +67,7 @@ bool virtio_is_blk(struct subchannel_id schid);
 void virtio_setup_block(struct subchannel_id schid);
 int virtio_read(ulong sector, void *load_addr);
 int enable_mss_facility(void);
+ulong get_second(void);
 
 /* bootmap.c */
 void zipl_load(void);
@@ -143,4 +144,42 @@ static inline void yield(void)
 
 #define MAX_SECTOR_SIZE 4096
 
+static inline void sleep(unsigned int seconds)
+{
+    ulong target = get_second() + seconds;
+
+    while (get_second() < target) {
+        yield();
+    }
+}
+
+static inline void *memcpy(void *s1, const void *s2, size_t n)
+{
+    uint8_t *p1 = s1;
+    const uint8_t *p2 = s2;
+
+    while (n--) {
+        p1[n] = p2[n];
+    }
+    return s1;
+}
+
+static inline void IPL_assert(bool term, const char *message)
+{
+    if (!term) {
+        sclp_print("\n! ");
+        sclp_print(message);
+        panic(" !\n"); /* no return */
+    }
+}
+
+static inline void IPL_check(bool term, const char *message)
+{
+    if (!term) {
+        sclp_print("\n! WARNING: ");
+        sclp_print(message);
+        sclp_print(" !\n");
+    }
+}
+
 #endif /* S390_CCW_H */
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index 2d27b1d500..da51fb7be0 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -162,7 +162,7 @@ static u64 get_clock(void)
     return r;
 }
 
-static ulong get_second(void)
+ulong get_second(void)
 {
     return (get_clock() >> 12) / 1000000;
 }