Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / m68k / include / asm / div64.h

diff --git a/kernel/arch/m68k/include/asm/div64.h b/kernel/arch/m68k/include/asm/div64.h
new file mode 100644 (file)
index 0000000..ef881cf
--- /dev/null
+++ b/kernel/arch/m68k/include/asm/div64.h
@@ -0,0 +1,35 @@
+#ifndef _M68K_DIV64_H
+#define _M68K_DIV64_H
+
+#ifdef CONFIG_CPU_HAS_NO_MULDIV64
+#include <asm-generic/div64.h>
+#else
+
+#include <linux/types.h>
+
+/* n = n / base; return rem; */
+
+#define do_div(n, base) ({                                     \
+       union {                                                 \
+               unsigned long n32[2];                           \
+               unsigned long long n64;                         \
+       } __n;                                                  \
+       unsigned long __rem, __upper;                           \
+       unsigned long __base = (base);                          \
+                                                               \
+       __n.n64 = (n);                                          \
+       if ((__upper = __n.n32[0])) {                           \
+               asm ("divul.l %2,%1:%0"                         \
+                    : "=d" (__n.n32[0]), "=d" (__upper)        \
+                    : "d" (__base), "0" (__n.n32[0]));         \
+       }                                                       \
+       asm ("divu.l %2,%1:%0"                                  \
+            : "=d" (__n.n32[1]), "=d" (__rem)                  \
+            : "d" (__base), "1" (__upper), "0" (__n.n32[1]));  \
+       (n) = __n.n64;                                          \
+       __rem;                                                  \
+})
+
+#endif /* CONFIG_CPU_HAS_NO_MULDIV64 */
+
+#endif /* _M68K_DIV64_H */