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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2007-02-05 21:18:31 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-02-05 21:18:31 +0100
commit31ee4b2f40994e8b21691f85cdd4052551a789b7 (patch)
tree1bb167e720e25a2ea9a5168b21cc882f85b18fa8 /arch
parent31cb4bd31a48f62105d037ad53192b94d4c08f53 (diff)
downloadlinux-2.6.34-ux500-31ee4b2f40994e8b21691f85cdd4052551a789b7.tar.gz
[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>
Diffstat (limited to 'arch')
-rw-r--r--arch/s390/Kconfig4
-rw-r--r--arch/s390/kernel/setup.c1
-rw-r--r--arch/s390/lib/Makefile2
-rw-r--r--arch/s390/lib/qrnnd.S77
-rw-r--r--arch/s390/math-emu/Makefile2
-rw-r--r--arch/s390/math-emu/math.c2
-rw-r--r--arch/s390/math-emu/qrnnd.S77
-rw-r--r--arch/s390/math-emu/sfp-util.h66
8 files changed, 81 insertions, 150 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 5c7e981c115..eaed402ad34 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -34,10 +34,6 @@ config GENERIC_HWEIGHT
bool
default y
-config GENERIC_CALIBRATE_DELAY
- bool
- default y
-
config GENERIC_TIME
def_bool y
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 2569aafcc54..2fa866f6f71 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -938,6 +938,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
struct cpuinfo_S390 *cpuinfo;
unsigned long n = (unsigned long) v - 1;
+ s390_adjust_jiffies();
preempt_disable();
if (!n) {
seq_printf(m, "vendor_id : IBM/S390\n"
diff --git a/arch/s390/lib/Makefile b/arch/s390/lib/Makefile
index b5f94cf3bde..7a44fed21b3 100644
--- a/arch/s390/lib/Makefile
+++ b/arch/s390/lib/Makefile
@@ -4,7 +4,7 @@
EXTRA_AFLAGS := -traditional
-lib-y += delay.o string.o uaccess_std.o uaccess_pt.o
+lib-y += delay.o string.o uaccess_std.o uaccess_pt.o qrnnd.o
lib-$(CONFIG_32BIT) += div64.o
lib-$(CONFIG_64BIT) += uaccess_mvcos.o
lib-$(CONFIG_SMP) += spinlock.o
diff --git a/arch/s390/lib/qrnnd.S b/arch/s390/lib/qrnnd.S
new file mode 100644
index 00000000000..eb1df632e74
--- /dev/null
+++ b/arch/s390/lib/qrnnd.S
@@ -0,0 +1,77 @@
+# S/390 __udiv_qrnnd
+
+# r2 : &__r
+# r3 : upper half of 64 bit word n
+# r4 : lower half of 64 bit word n
+# r5 : divisor d
+# the reminder r of the division is to be stored to &__r and
+# the quotient q is to be returned
+
+ .text
+ .globl __udiv_qrnnd
+__udiv_qrnnd:
+ st %r2,24(%r15) # store pointer to reminder for later
+ lr %r0,%r3 # reload n
+ lr %r1,%r4
+ ltr %r2,%r5 # reload and test divisor
+ jp 5f
+ # divisor >= 0x80000000
+ srdl %r0,2 # n/4
+ srl %r2,1 # d/2
+ slr %r1,%r2 # special case if last bit of d is set
+ brc 3,0f # (n/4) div (n/2) can overflow by 1
+ ahi %r0,-1 # trick: subtract n/2, then divide
+0: dr %r0,%r2 # signed division
+ ahi %r1,1 # trick part 2: add 1 to the quotient
+ # now (n >> 2) = (d >> 1) * %r1 + %r0
+ lhi %r3,1
+ nr %r3,%r1 # test last bit of q
+ jz 1f
+ alr %r0,%r2 # add (d>>1) to r
+1: srl %r1,1 # q >>= 1
+ # now (n >> 2) = (d&-2) * %r1 + %r0
+ lhi %r3,1
+ nr %r3,%r5 # test last bit of d
+ jz 2f
+ slr %r0,%r1 # r -= q
+ brc 3,2f # borrow ?
+ alr %r0,%r5 # r += d
+ ahi %r1,-1
+2: # now (n >> 2) = d * %r1 + %r0
+ alr %r1,%r1 # q <<= 1
+ alr %r0,%r0 # r <<= 1
+ brc 12,3f # overflow on r ?
+ slr %r0,%r5 # r -= d
+ ahi %r1,1 # q += 1
+3: lhi %r3,2
+ nr %r3,%r4 # test next to last bit of n
+ jz 4f
+ ahi %r0,1 # r += 1
+4: clr %r0,%r5 # r >= d ?
+ jl 6f
+ slr %r0,%r5 # r -= d
+ ahi %r1,1 # q += 1
+ # now (n >> 1) = d * %r1 + %r0
+ j 6f
+5: # divisor < 0x80000000
+ srdl %r0,1
+ dr %r0,%r2 # signed division
+ # now (n >> 1) = d * %r1 + %r0
+6: alr %r1,%r1 # q <<= 1
+ alr %r0,%r0 # r <<= 1
+ brc 12,7f # overflow on r ?
+ slr %r0,%r5 # r -= d
+ ahi %r1,1 # q += 1
+7: lhi %r3,1
+ nr %r3,%r4 # isolate last bit of n
+ alr %r0,%r3 # r += (n & 1)
+ clr %r0,%r5 # r >= d ?
+ jl 8f
+ slr %r0,%r5 # r -= d
+ ahi %r1,1 # q += 1
+8: # now n = d * %r1 + %r0
+ l %r2,24(%r15)
+ st %r0,0(%r2)
+ lr %r2,%r1
+ br %r14
+ .end __udiv_qrnnd
diff --git a/arch/s390/math-emu/Makefile b/arch/s390/math-emu/Makefile
index c10df144f2a..73b3e72efc4 100644
--- a/arch/s390/math-emu/Makefile
+++ b/arch/s390/math-emu/Makefile
@@ -2,7 +2,7 @@
# Makefile for the FPU instruction emulation.
#
-obj-$(CONFIG_MATHEMU) := math.o qrnnd.o
+obj-$(CONFIG_MATHEMU) := math.o
EXTRA_CFLAGS := -I$(src) -Iinclude/math-emu -w
EXTRA_AFLAGS := -traditional
diff --git a/arch/s390/math-emu/math.c b/arch/s390/math-emu/math.c
index 6b9aec5a2c1..3ee78ccb617 100644
--- a/arch/s390/math-emu/math.c
+++ b/arch/s390/math-emu/math.c
@@ -15,7 +15,7 @@
#include <asm/uaccess.h>
#include <asm/lowcore.h>
-#include "sfp-util.h"
+#include <asm/sfp-util.h>
#include <math-emu/soft-fp.h>
#include <math-emu/single.h>
#include <math-emu/double.h>
diff --git a/arch/s390/math-emu/qrnnd.S b/arch/s390/math-emu/qrnnd.S
deleted file mode 100644
index b01c2b648e2..00000000000
--- a/arch/s390/math-emu/qrnnd.S
+++ /dev/null
@@ -1,77 +0,0 @@
-# S/390 __udiv_qrnnd
-
-# r2 : &__r
-# r3 : upper half of 64 bit word n
-# r4 : lower half of 64 bit word n
-# r5 : divisor d
-# the reminder r of the division is to be stored to &__r and
-# the quotient q is to be returned
-
- .text
- .globl __udiv_qrnnd
-__udiv_qrnnd:
- st %r2,24(%r15) # store pointer to reminder for later
- lr %r0,%r3 # reload n
- lr %r1,%r4
- ltr %r2,%r5 # reload and test divisor
- jp 5f
- # divisor >= 0x80000000
- srdl %r0,2 # n/4
- srl %r2,1 # d/2
- slr %r1,%r2 # special case if last bit of d is set
- brc 3,0f # (n/4) div (n/2) can overflow by 1
- ahi %r0,-1 # trick: subtract n/2, then divide
-0: dr %r0,%r2 # signed division
- ahi %r1,1 # trick part 2: add 1 to the quotient
- # now (n >> 2) = (d >> 1) * %r1 + %r0
- lhi %r3,1
- nr %r3,%r1 # test last bit of q
- jz 1f
- alr %r0,%r2 # add (d>>1) to r
-1: srl %r1,1 # q >>= 1
- # now (n >> 2) = (d&-2) * %r1 + %r0
- lhi %r3,1
- nr %r3,%r5 # test last bit of d
- jz 2f
- slr %r0,%r1 # r -= q
- brc 3,2f # borrow ?
- alr %r0,%r5 # r += d
- ahi %r1,-1
-2: # now (n >> 2) = d * %r1 + %r0
- alr %r1,%r1 # q <<= 1
- alr %r0,%r0 # r <<= 1
- brc 12,3f # overflow on r ?
- slr %r0,%r5 # r -= d
- ahi %r1,1 # q += 1
-3: lhi %r3,2
- nr %r3,%r4 # test next to last bit of n
- jz 4f
- ahi %r0,1 # r += 1
-4: clr %r0,%r5 # r >= d ?
- jl 6f
- slr %r0,%r5 # r -= d
- ahi %r1,1 # q += 1
- # now (n >> 1) = d * %r1 + %r0
- j 6f
-5: # divisor < 0x80000000
- srdl %r0,1
- dr %r0,%r2 # signed division
- # now (n >> 1) = d * %r1 + %r0
-6: alr %r1,%r1 # q <<= 1
- alr %r0,%r0 # r <<= 1
- brc 12,7f # overflow on r ?
- slr %r0,%r5 # r -= d
- ahi %r1,1 # q += 1
-7: lhi %r3,1
- nr %r3,%r4 # isolate last bit of n
- alr %r0,%r3 # r += (n & 1)
- clr %r0,%r5 # r >= d ?
- jl 8f
- slr %r0,%r5 # r -= d
- ahi %r1,1 # q += 1
-8: # now n = d * %r1 + %r0
- l %r2,24(%r15)
- st %r0,0(%r2)
- lr %r2,%r1
- br %r14
- .end __udiv_qrnnd
diff --git a/arch/s390/math-emu/sfp-util.h b/arch/s390/math-emu/sfp-util.h
deleted file mode 100644
index 5b6ca4570ea..00000000000
--- a/arch/s390/math-emu/sfp-util.h
+++ /dev/null
@@ -1,66 +0,0 @@
-#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 long __r; \
- (q) = __udiv_qrnnd (&__r, (n1), (n0), (d)); \
- (r) = __r; \
- } while (0)
-extern unsigned long __udiv_qrnnd (unsigned long *, unsigned long,
- unsigned long , unsigned long);
-
-#define UDIV_NEEDS_NORMALIZATION 0
-
-#define abort() return 0
-
-#define __BYTE_ORDER __BIG_ENDIAN