pc-bios/s390-ccw: Move byteswap functions to a separate header

We'll need them in code that is not related to bootmap.h, so
they should reside in an independent header.

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1499863793-18627-6-git-send-email-thuth@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

3 files changed, 31 insertions, 26 deletions

diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
index 458d3dac36..67a6123ed4 100644
--- a/pc-bios/s390-ccw/bootmap.c
+++ b/pc-bios/s390-ccw/bootmap.c
@@ -12,6 +12,7 @@
 #include "s390-ccw.h"
 #include "bootmap.h"
 #include "virtio.h"
+#include "bswap.h"
 
 #ifdef DEBUG
 /* #define DEBUG_FALLBACK */
diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h
index 7f367820f3..cf99a4c728 100644
--- a/pc-bios/s390-ccw/bootmap.h
+++ b/pc-bios/s390-ccw/bootmap.h
@@ -324,32 +324,6 @@ static inline int _memcmp(const void *s1, const void *s2, size_t n)
     return 0;
 }
 
-/* from include/qemu/bswap.h */
-
-/* El Torito is always little-endian */
-static inline uint16_t bswap16(uint16_t x)
-{
-    return ((x & 0x00ff) << 8) | ((x & 0xff00) >> 8);
-}
-
-static inline uint32_t bswap32(uint32_t x)
-{
-    return ((x & 0x000000ffU) << 24) | ((x & 0x0000ff00U) <<  8) |
-           ((x & 0x00ff0000U) >>  8) | ((x & 0xff000000U) >> 24);
-}
-
-static inline uint64_t bswap64(uint64_t x)
-{
-    return ((x & 0x00000000000000ffULL) << 56) |
-           ((x & 0x000000000000ff00ULL) << 40) |
-           ((x & 0x0000000000ff0000ULL) << 24) |
-           ((x & 0x00000000ff000000ULL) <<  8) |
-           ((x & 0x000000ff00000000ULL) >>  8) |
-           ((x & 0x0000ff0000000000ULL) >> 24) |
-           ((x & 0x00ff000000000000ULL) >> 40) |
-           ((x & 0xff00000000000000ULL) >> 56);
-}
-
 static inline uint32_t iso_733_to_u32(uint64_t x)
 {
     return (uint32_t)x;
diff --git a/pc-bios/s390-ccw/bswap.h b/pc-bios/s390-ccw/bswap.h
new file mode 100644
index 0000000000..a4226042bc
--- /dev/null
+++ b/pc-bios/s390-ccw/bswap.h
@@ -0,0 +1,30 @@
+/*
+ * Byte swap functions - taken from include/qemu/bswap.h
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+static inline uint16_t bswap16(uint16_t x)
+{
+    return ((x & 0x00ff) << 8) | ((x & 0xff00) >> 8);
+}
+
+static inline uint32_t bswap32(uint32_t x)
+{
+    return ((x & 0x000000ffU) << 24) | ((x & 0x0000ff00U) <<  8) |
+           ((x & 0x00ff0000U) >>  8) | ((x & 0xff000000U) >> 24);
+}
+
+static inline uint64_t bswap64(uint64_t x)
+{
+    return ((x & 0x00000000000000ffULL) << 56) |
+           ((x & 0x000000000000ff00ULL) << 40) |
+           ((x & 0x0000000000ff0000ULL) << 24) |
+           ((x & 0x00000000ff000000ULL) <<  8) |
+           ((x & 0x000000ff00000000ULL) >>  8) |
+           ((x & 0x0000ff0000000000ULL) >> 24) |
+           ((x & 0x00ff000000000000ULL) >> 40) |
+           ((x & 0xff00000000000000ULL) >> 56);
+}