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-rw-r--r--ChangeLog20
-rw-r--r--manual/platform.texi8
-rw-r--r--sysdeps/powerpc/sys/platform/ppc.h1
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/Makefile6
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/bits/ppc.h33
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c26
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions3
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions3
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libc.abilist1
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/test-gettimebasefreq.c62
11 files changed, 164 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 1fff9bad72..5acd55be26 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,23 @@
+2012-09-25 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
+
+ * manual/platform.texi (PowerPC): Document __ppc_get_timebase_freq.
+ * sysdeps/powerpc/sys/platform/ppc.h: Include the operating
+ system header.
+ * sysdeps/unix/sysv/linux/powerpc/Makefile (sysdep_headers):
+ Likewise.
+ (sydep_routines): Add the new and the internal functions.
+ * sysdeps/unix/sysv/linux/powerpc/bits/ppc.h: New file.
+ * sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c: Likewise.
+ * sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions
+ (GLIBC_2.17): Add the new function.
+ * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libc.abilist
+ (GLIBC_2.17): Likewise.
+ * sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions
+ (GLIBC_2.17): Likewise.
+ * sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libc.abilist
+ (GLIBC_2.17): Likewise.
+ * sysdeps/unix/sysv/linux/powerpc/test-gettimebasefreq.c: New file.
+
2012-09-25 Alan Modra <amodra@gmail.com>
* sysdeps/unix/sysv/linux/powerpc/pthread_once.c (__pthread_once):
diff --git a/manual/platform.texi b/manual/platform.texi
index 02b5c554ab..e387ff4cc9 100644
--- a/manual/platform.texi
+++ b/manual/platform.texi
@@ -26,3 +26,11 @@ different from the processor frequency. More information is available in
without requiring assistance from the operating system, so it is very
efficient.
@end deftypefun
+
+@deftypefun {uint64_t} __ppc_get_timebase_freq (void)
+Read the current frequency at which the Time Base Register is updated.
+
+This frequency is not related to the processor clock or the bus clock.
+It is also possible that this frequency is not constant. More information is
+available in @cite{Power ISA 2.06b - Book II - Section 5.2}.
+@end deftypefun
diff --git a/sysdeps/powerpc/sys/platform/ppc.h b/sysdeps/powerpc/sys/platform/ppc.h
index 165652c7cc..3780f57ba1 100644
--- a/sysdeps/powerpc/sys/platform/ppc.h
+++ b/sysdeps/powerpc/sys/platform/ppc.h
@@ -20,6 +20,7 @@
#define _SYS_PLATFORM_PPC_H 1
#include <stdint.h>
+#include <bits/ppc.h>
/* Read the Time Base Register. */
static inline uint64_t
diff --git a/sysdeps/unix/sysv/linux/powerpc/Makefile b/sysdeps/unix/sysv/linux/powerpc/Makefile
index f6dccd9a3f..6bdf4dc7f5 100644
--- a/sysdeps/unix/sysv/linux/powerpc/Makefile
+++ b/sysdeps/unix/sysv/linux/powerpc/Makefile
@@ -16,3 +16,9 @@ endif
ifeq ($(subdir),elf)
sysdep_routines += dl-vdso
endif
+
+ifeq ($(subdir),misc)
+sysdep_headers += bits/ppc.h
+sysdep_routines += get_clockfreq get_timebase_freq
+tests += test-gettimebasefreq
+endif
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/ppc.h b/sysdeps/unix/sysv/linux/powerpc/bits/ppc.h
new file mode 100644
index 0000000000..76542d9d86
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/ppc.h
@@ -0,0 +1,33 @@
+/* Facilities specific to the PowerPC architecture on Linux
+ Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _BITS_PPC_H
+#define _BITS_PPC_H
+
+#ifndef _SYS_PLATFORM_PPC_H
+# error "Never include this file directly; use <sys/platform/ppc.h> instead."
+#endif
+
+__BEGIN_DECLS
+
+/* Read the time base frequency. */
+extern uint64_t __ppc_get_timebase_freq (void);
+
+__END_DECLS
+
+#endif
diff --git a/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c b/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c
new file mode 100644
index 0000000000..f62ed86055
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c
@@ -0,0 +1,26 @@
+/* Get the frequency of the time base.
+ Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <libc-internal.h>
+
+uint64_t
+__get_timebase_freq (void)
+{
+ return (uint64_t) __get_clockfreq ();
+}
+weak_alias (__get_timebase_freq, __ppc_get_timebase_freq)
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions b/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions
index 6fa0119e95..8d1c3a59de 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/Versions
@@ -30,4 +30,7 @@ libc {
GLIBC_2.11 {
fallocate64;
}
+ GLIBC_2.17 {
+ __ppc_get_timebase_freq;
+ }
}
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libc.abilist
index 75123b9f3a..ab96361d40 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/nptl/libc.abilist
@@ -1775,6 +1775,7 @@ GLIBC_2.16
GLIBC_2.17
GLIBC_2.17 A
secure_getenv F
+ __ppc_get_timebase_freq F
GLIBC_2.2
GLIBC_2.2 A
_IO_adjust_wcolumn F
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions b/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions
index 8334741aec..3ff01d1c14 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions
@@ -19,4 +19,7 @@ libc {
setcontext;
swapcontext;
}
+ GLIBC_2.17 {
+ __ppc_get_timebase_freq;
+ }
}
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libc.abilist b/sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libc.abilist
index e2484d3f22..a60b72ad1a 100644
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libc.abilist
+++ b/sysdeps/unix/sysv/linux/powerpc/powerpc64/nptl/libc.abilist
@@ -81,6 +81,7 @@ GLIBC_2.16
GLIBC_2.17
GLIBC_2.17 A
secure_getenv F
+ __ppc_get_timebase_freq F
GLIBC_2.3
GLIBC_2.3 A
_Exit F
diff --git a/sysdeps/unix/sysv/linux/powerpc/test-gettimebasefreq.c b/sysdeps/unix/sysv/linux/powerpc/test-gettimebasefreq.c
new file mode 100644
index 0000000000..a3f3bd6f55
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/test-gettimebasefreq.c
@@ -0,0 +1,62 @@
+/* Check __ppc_get_timebase_freq() for architecture changes
+ Copyright (C) 2012 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+/* Test if __ppc_get_timebase_freq() works and is different from zero. A read
+ failure might indicate a Linux Kernel change.
+ This test also use the frequency to compute the real elapsed time. */
+
+#include <inttypes.h>
+#include <stdio.h>
+
+#include <sys/platform/ppc.h>
+
+/* Maximum value of the Time Base Register: 2^60 - 1. */
+#define MAX_TB 0xFFFFFFFFFFFFFFF
+
+static int
+do_test (void)
+{
+ uint64_t t1, t2, f, diff;
+
+ t1 = __ppc_get_timebase ();
+ printf ("t1 = %"PRIu64"\n", t1);
+
+ f = __ppc_get_timebase_freq ();
+ printf ("Time Base frequency = %"PRIu64" Hz\n", f);
+
+ if (f == 0) {
+ printf ("Fail: The time base frequency can't be zero.");
+ return 1;
+ }
+
+ t2 = __ppc_get_timebase ();
+ printf ("t2 = %"PRIu64"\n", t2);
+
+ if (t2 > t1) {
+ diff = t2 - t1;
+ } else {
+ diff = (MAX_TB - t2) + t1;
+ }
+
+ printf ("Elapsed time = %1.2f usecs\n", (double) diff * 1000000 / f );
+
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
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