Add __ppc_get_timebase_freq to ppc.h.

8 files changed, 135 insertions, 0 deletions

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"