[S390] Calibrate delay and bogomips.

Preset the bogomips number to the cpu capacity value reported by
store system information in SYSIB 1.2.2. This value is constant
for a particular machine model and can be used to determine
relative performance differences between machines.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/include/asm-s390/sfp-util.h b/include/asm-s390/sfp-util.h
new file mode 100644
index 000000000000..8cabcd23d976
--- /dev/null
+++ b/include/asm-s390/sfp-util.h
@@ -0,0 +1,66 @@
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+#define add_ssaaaa(sh, sl, ah, al, bh, bl) ({		\
+	unsigned int __sh = (ah);			\
+	unsigned int __sl = (al);			\
+	asm volatile(					\
+		"	alr	%1,%3\n"		\
+		"	brc	12,0f\n"		\
+		"	ahi	%0,1\n"			\
+		"0:	alr  %0,%2"			\
+		: "+&d" (__sh), "+d" (__sl)		\
+		: "d" (bh), "d" (bl) : "cc");		\
+	(sh) = __sh;					\
+	(sl) = __sl;					\
+})
+
+#define sub_ddmmss(sh, sl, ah, al, bh, bl) ({		\
+	unsigned int __sh = (ah);			\
+	unsigned int __sl = (al);			\
+	asm volatile(					\
+		"	slr	%1,%3\n"		\
+		"	brc	3,0f\n"			\
+		"	ahi	%0,-1\n"		\
+		"0:	slr	%0,%2"			\
+		: "+&d" (__sh), "+d" (__sl)		\
+		: "d" (bh), "d" (bl) : "cc");		\
+	(sh) = __sh;					\
+	(sl) = __sl;					\
+})
+
+/* a umul b = a mul b + (a>=2<<31) ? b<<32:0 + (b>=2<<31) ? a<<32:0 */
+#define umul_ppmm(wh, wl, u, v) ({			\
+	unsigned int __wh = u;				\
+	unsigned int __wl = v;				\
+	asm volatile(					\
+		"	ltr	1,%0\n"			\
+		"	mr	0,%1\n"			\
+		"	jnm	0f\n"				\
+		"	alr	0,%1\n"			\
+		"0:	ltr	%1,%1\n"			\
+		"	jnm	1f\n"				\
+		"	alr	0,%0\n"			\
+		"1:	lr	%0,0\n"			\
+		"	lr	%1,1\n"			\
+		: "+d" (__wh), "+d" (__wl)		\
+		: : "0", "1", "cc");			\
+	wh = __wh;					\
+	wl = __wl;					\
+})
+
+#define udiv_qrnnd(q, r, n1, n0, d)			\
+  do { unsigned int __r;				\
+    (q) = __udiv_qrnnd (&__r, (n1), (n0), (d));		\
+    (r) = __r;						\
+  } while (0)
+extern unsigned long __udiv_qrnnd (unsigned int *, unsigned int,
+				   unsigned int , unsigned int);
+
+#define UDIV_NEEDS_NORMALIZATION 0
+
+#define abort() return 0
+
+#define __BYTE_ORDER __BIG_ENDIAN