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commit 6e8ba7fd574f530afb9681f21604475d5756d773
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Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Date: Fri Feb 8 16:53:40 2019 +0000
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Remove __get_clockfreq
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With clock_getres, clock_gettime, and clock_settime refactor to remove the
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generic CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID support through
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hp-timing, there is no usage of internal __get_clockfreq. This patch removes
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both generic and Linux implementation..
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Checked with a build against aarch64-linux-gnu, i686-linux-gnu, ia64-linux-gnu,
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sparc64-linux-gnu, powerpc-linux-gnu-power4.
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* include/libc-internal.h (__get_clockfreq): Remove prototype.
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* rt/Makefile (clock-routines): Remove get_clockfreq.
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* rt/get_clockfreq.c: Remove file.
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* sysdeps/unix/sysv/linux/i386/get_clockfreq.c: Likewise.
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* sysdeps/unix/sysv/linux/ia64/get_clockfreq.c: Likewise.
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* sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c: Likewise.
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* sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c: Move code to ...
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* sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c: ... here.
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Conflicts:
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rt/get_clockfreq.c
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sysdeps/unix/sysv/linux/i386/get_clockfreq.c
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sysdeps/unix/sysv/linux/ia64/get_clockfreq.c
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sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
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(Removal after copyright year change upstream.)
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sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c
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(Likewise. Missing backport of aa0e46636a5b71 ("Break
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further lines before not after operators.").)
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diff --git a/include/libc-internal.h b/include/libc-internal.h
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index 2167990c52bd708b..2ec07d9355db1808 100644
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--- a/include/libc-internal.h
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+++ b/include/libc-internal.h
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@@ -36,9 +36,6 @@ libc_hidden_proto (__profile_frequency)
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extern void __cyg_profile_func_enter (void *this_fn, void *call_site);
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extern void __cyg_profile_func_exit (void *this_fn, void *call_site);
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-/* Get frequency of the system processor. */
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-extern hp_timing_t __get_clockfreq (void);
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-
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/* Free all allocated resources. */
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extern void __libc_freeres (void);
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libc_hidden_proto (__libc_freeres)
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diff --git a/rt/Makefile b/rt/Makefile
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index 6d6b896ee9817c5c..14f38ef74d262188 100644
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--- a/rt/Makefile
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+++ b/rt/Makefile
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@@ -28,7 +28,7 @@ aio-routines := aio_cancel aio_error aio_fsync aio_misc aio_read \
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aio_read64 aio_return aio_suspend aio_write \
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aio_write64 lio_listio lio_listio64 aio_sigqueue \
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aio_notify
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-clock-routines := get_clockfreq clock_getcpuclockid \
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+clock-routines := clock_getcpuclockid \
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clock_getres clock_gettime clock_settime \
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clock_nanosleep
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timer-routines := timer_create timer_delete timer_getoverr \
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diff --git a/rt/get_clockfreq.c b/rt/get_clockfreq.c
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deleted file mode 100644
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index e695a6018c0b8322..0000000000000000
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--- a/rt/get_clockfreq.c
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+++ /dev/null
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@@ -1,27 +0,0 @@
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-/* Get frequency of the system processor.
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- Copyright (C) 2000-2018 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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-
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- The GNU C Library is free software; you can redistribute it and/or
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- modify it under the terms of the GNU Lesser General Public
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- License as published by the Free Software Foundation; either
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- version 2.1 of the License, or (at your option) any later version.
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-
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- The GNU C Library is distributed in the hope that it will be useful,
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- but WITHOUT ANY WARRANTY; without even the implied warranty of
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- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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- Lesser General Public License for more details.
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-
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- You should have received a copy of the GNU Lesser General Public
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- License along with the GNU C Library; if not, see
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- <http://www.gnu.org/licenses/>. */
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-
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-#include <libc-internal.h>
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-
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-hp_timing_t
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-__get_clockfreq (void)
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-{
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- /* There is no generic way to find this out since we have in general
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- no counter register either. */
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- return 0;
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-}
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diff --git a/sysdeps/unix/sysv/linux/i386/get_clockfreq.c b/sysdeps/unix/sysv/linux/i386/get_clockfreq.c
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deleted file mode 100644
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index 633f186be80f10b0..0000000000000000
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--- a/sysdeps/unix/sysv/linux/i386/get_clockfreq.c
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+++ /dev/null
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@@ -1,88 +0,0 @@
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-/* Get frequency of the system processor. i386/Linux version.
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- Copyright (C) 2000-2018 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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-
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- The GNU C Library is free software; you can redistribute it and/or
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- modify it under the terms of the GNU Lesser General Public
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- License as published by the Free Software Foundation; either
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- version 2.1 of the License, or (at your option) any later version.
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-
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- The GNU C Library is distributed in the hope that it will be useful,
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- but WITHOUT ANY WARRANTY; without even the implied warranty of
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- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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- Lesser General Public License for more details.
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-
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- You should have received a copy of the GNU Lesser General Public
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- License along with the GNU C Library; if not, see
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- <http://www.gnu.org/licenses/>. */
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-
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-#include <ctype.h>
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-#include <fcntl.h>
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-#include <string.h>
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-#include <unistd.h>
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-
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-hp_timing_t
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-__get_clockfreq (void)
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-{
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- /* We read the information from the /proc filesystem. It contains at
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- least one line like
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- cpu MHz : 497.840237
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- or also
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- cpu MHz : 497.841
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- We search for this line and convert the number in an integer. */
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- static hp_timing_t result;
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- int fd;
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-
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- /* If this function was called before, we know the result. */
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- if (result != 0)
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- return result;
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-
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- fd = __open ("/proc/cpuinfo", O_RDONLY);
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- if (__glibc_likely (fd != -1))
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- {
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- /* XXX AFAIK the /proc filesystem can generate "files" only up
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- to a size of 4096 bytes. */
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- char buf[4096];
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- ssize_t n;
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-
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- n = __read (fd, buf, sizeof buf);
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- if (__builtin_expect (n, 1) > 0)
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- {
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- char *mhz = memmem (buf, n, "cpu MHz", 7);
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-
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- if (__glibc_likely (mhz != NULL))
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- {
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- char *endp = buf + n;
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- int seen_decpoint = 0;
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- int ndigits = 0;
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-
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- /* Search for the beginning of the string. */
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- while (mhz < endp && (*mhz < '0' || *mhz > '9') && *mhz != '\n')
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- ++mhz;
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-
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- while (mhz < endp && *mhz != '\n')
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- {
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- if (*mhz >= '0' && *mhz <= '9')
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- {
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- result *= 10;
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- result += *mhz - '0';
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- if (seen_decpoint)
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- ++ndigits;
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- }
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- else if (*mhz == '.')
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- seen_decpoint = 1;
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-
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- ++mhz;
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- }
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-
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- /* Compensate for missing digits at the end. */
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- while (ndigits++ < 6)
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- result *= 10;
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- }
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- }
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-
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- __close (fd);
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- }
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-
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- return result;
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-}
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diff --git a/sysdeps/unix/sysv/linux/ia64/get_clockfreq.c b/sysdeps/unix/sysv/linux/ia64/get_clockfreq.c
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deleted file mode 100644
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index f9d683a90247ac60..0000000000000000
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--- a/sysdeps/unix/sysv/linux/ia64/get_clockfreq.c
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+++ /dev/null
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@@ -1,87 +0,0 @@
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-/* Get frequency of the system processor. IA-64/Linux version.
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- Copyright (C) 2001-2018 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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-
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- The GNU C Library is free software; you can redistribute it and/or
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- modify it under the terms of the GNU Lesser General Public
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- License as published by the Free Software Foundation; either
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- version 2.1 of the License, or (at your option) any later version.
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-
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- The GNU C Library is distributed in the hope that it will be useful,
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- but WITHOUT ANY WARRANTY; without even the implied warranty of
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- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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- Lesser General Public License for more details.
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-
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- You should have received a copy of the GNU Lesser General Public
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- License along with the GNU C Library; if not, see
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- <http://www.gnu.org/licenses/>. */
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-
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-#include <ctype.h>
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-#include <fcntl.h>
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-#include <string.h>
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-#include <unistd.h>
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-
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-
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-hp_timing_t
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-__get_clockfreq (void)
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-{
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- /* We read the information from the /proc filesystem. It contains at
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- least one line like
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- itc MHz : 733.390988
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- We search for this line and convert the number in an integer. */
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- static hp_timing_t result;
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- int fd;
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-
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- /* If this function was called before, we know the result. */
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- if (result != 0)
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- return result;
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-
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- fd = __open ("/proc/cpuinfo", O_RDONLY);
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- if (__builtin_expect (fd != -1, 1))
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- {
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- /* XXX AFAIK the /proc filesystem can generate "files" only up
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- to a size of 4096 bytes. */
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- char buf[4096];
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- ssize_t n;
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-
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- n = __read (fd, buf, sizeof buf);
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- if (__builtin_expect (n, 1) > 0)
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- {
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- char *mhz = memmem (buf, n, "itc MHz", 7);
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-
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- if (__builtin_expect (mhz != NULL, 1))
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- {
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- char *endp = buf + n;
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- int seen_decpoint = 0;
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- int ndigits = 0;
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-
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- /* Search for the beginning of the string. */
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- while (mhz < endp && (*mhz < '0' || *mhz > '9') && *mhz != '\n')
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- ++mhz;
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-
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- while (mhz < endp && *mhz != '\n')
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- {
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- if (*mhz >= '0' && *mhz <= '9')
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- {
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- result *= 10;
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- result += *mhz - '0';
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- if (seen_decpoint)
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- ++ndigits;
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- }
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- else if (*mhz == '.')
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- seen_decpoint = 1;
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-
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- ++mhz;
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- }
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-
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- /* Compensate for missing digits at the end. */
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- while (ndigits++ < 6)
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- result *= 10;
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- }
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- }
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-
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- __close (fd);
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- }
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-
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- return result;
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-}
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diff --git a/sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c b/sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
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deleted file mode 100644
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index 3a2216021bfb5408..0000000000000000
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--- a/sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
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981dc9 |
+++ /dev/null
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@@ -1,107 +0,0 @@
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981dc9 |
-/* Get frequency of the system processor. powerpc/Linux version.
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981dc9 |
- Copyright (C) 2000-2018 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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-
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|
981dc9 |
- The GNU C Library is free software; you can redistribute it and/or
|
|
|
981dc9 |
- modify it under the terms of the GNU Lesser General Public
|
|
|
981dc9 |
- License as published by the Free Software Foundation; either
|
|
|
981dc9 |
- version 2.1 of the License, or (at your option) any later version.
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- The GNU C Library is distributed in the hope that it will be useful,
|
|
|
981dc9 |
- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
981dc9 |
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
981dc9 |
- Lesser General Public License for more details.
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- You should have received a copy of the GNU Lesser General Public
|
|
|
981dc9 |
- License along with the GNU C Library; if not, see
|
|
|
981dc9 |
- <http://www.gnu.org/licenses/>. */
|
|
|
981dc9 |
-
|
|
|
981dc9 |
-#include <ctype.h>
|
|
|
981dc9 |
-#include <fcntl.h>
|
|
|
981dc9 |
-#include <stdint.h>
|
|
|
981dc9 |
-#include <string.h>
|
|
|
981dc9 |
-#include <unistd.h>
|
|
|
981dc9 |
-#include <sysdep.h>
|
|
|
981dc9 |
-#include <libc-vdso.h>
|
|
|
981dc9 |
-#include <not-cancel.h>
|
|
|
981dc9 |
-
|
|
|
981dc9 |
-hp_timing_t
|
|
|
981dc9 |
-__get_clockfreq (void)
|
|
|
981dc9 |
-{
|
|
|
981dc9 |
- hp_timing_t result = 0L;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
-#ifdef SHARED
|
|
|
981dc9 |
- /* The vDSO does not return an error (it clear cr0.so on returning). */
|
|
|
981dc9 |
- INTERNAL_SYSCALL_DECL (err);
|
|
|
981dc9 |
- result =
|
|
|
981dc9 |
- INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK (get_tbfreq, err, uint64_t, 0);
|
|
|
981dc9 |
-#else
|
|
|
981dc9 |
- /* We read the information from the /proc filesystem. /proc/cpuinfo
|
|
|
981dc9 |
- contains at least one line like:
|
|
|
981dc9 |
- timebase : 33333333
|
|
|
981dc9 |
- We search for this line and convert the number into an integer. */
|
|
|
981dc9 |
- int fd = __open_nocancel ("/proc/cpuinfo", O_RDONLY);
|
|
|
981dc9 |
- if (__glibc_likely (fd != -1))
|
|
|
981dc9 |
- return result;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- /* The timebase will be in the 1st 1024 bytes for systems with up
|
|
|
981dc9 |
- to 8 processors. If the first read returns less then 1024
|
|
|
981dc9 |
- bytes read, we have the whole cpuinfo and can start the scan.
|
|
|
981dc9 |
- Otherwise we will have to read more to insure we have the
|
|
|
981dc9 |
- timebase value in the scan. */
|
|
|
981dc9 |
- char buf[1024];
|
|
|
981dc9 |
- ssize_t n;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- n = __read_nocancel (fd, buf, sizeof (buf));
|
|
|
981dc9 |
- if (n == sizeof (buf))
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- /* We are here because the 1st read returned exactly sizeof
|
|
|
981dc9 |
- (buf) bytes. This implies that we are not at EOF and may
|
|
|
981dc9 |
- not have read the timebase value yet. So we need to read
|
|
|
981dc9 |
- more bytes until we know we have EOF. We copy the lower
|
|
|
981dc9 |
- half of buf to the upper half and read sizeof (buf)/2
|
|
|
981dc9 |
- bytes into the lower half of buf and repeat until we
|
|
|
981dc9 |
- reach EOF. We can assume that the timebase will be in
|
|
|
981dc9 |
- the last 512 bytes of cpuinfo, so two 512 byte half_bufs
|
|
|
981dc9 |
- will be sufficient to contain the timebase and will
|
|
|
981dc9 |
- handle the case where the timebase spans the half_buf
|
|
|
981dc9 |
- boundry. */
|
|
|
981dc9 |
- const ssize_t half_buf = sizeof (buf) / 2;
|
|
|
981dc9 |
- while (n >= half_buf)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- memcpy (buf, buf + half_buf, half_buf);
|
|
|
981dc9 |
- n = __read_nocancel (fd, buf + half_buf, half_buf);
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- if (n >= 0)
|
|
|
981dc9 |
- n += half_buf;
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- __close_nocancel (fd);
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- if (__glibc_likely (n > 0))
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- char *mhz = memmem (buf, n, "timebase", 7);
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- if (__glibc_likely (mhz != NULL))
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- char *endp = buf + n;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- /* Search for the beginning of the string. */
|
|
|
981dc9 |
- while (mhz < endp && (*mhz < '0' || *mhz > '9') && *mhz != '\n')
|
|
|
981dc9 |
- ++mhz;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- while (mhz < endp && *mhz != '\n')
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- if (*mhz >= '0' && *mhz <= '9')
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- result *= 10;
|
|
|
981dc9 |
- result += *mhz - '0';
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- ++mhz;
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
-#endif
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- return result;
|
|
|
981dc9 |
-}
|
|
|
981dc9 |
diff --git a/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c b/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c
|
|
|
981dc9 |
index 6435e1f31529c7de..1177ccbc8faeafe7 100644
|
|
|
981dc9 |
--- a/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c
|
|
|
981dc9 |
+++ b/sysdeps/unix/sysv/linux/powerpc/get_timebase_freq.c
|
|
|
981dc9 |
@@ -17,11 +17,90 @@
|
|
|
981dc9 |
<http://www.gnu.org/licenses/>. */
|
|
|
981dc9 |
|
|
|
981dc9 |
#include <stdint.h>
|
|
|
981dc9 |
+#include <string.h>
|
|
|
981dc9 |
+
|
|
|
981dc9 |
#include <libc-internal.h>
|
|
|
981dc9 |
+#include <not-cancel.h>
|
|
|
981dc9 |
+#include <libc-vdso.h>
|
|
|
981dc9 |
|
|
|
981dc9 |
uint64_t
|
|
|
981dc9 |
__get_timebase_freq (void)
|
|
|
981dc9 |
{
|
|
|
981dc9 |
- return (uint64_t) __get_clockfreq ();
|
|
|
981dc9 |
+ hp_timing_t result = 0L;
|
|
|
981dc9 |
+
|
|
|
981dc9 |
+#ifdef SHARED
|
|
|
981dc9 |
+ /* The vDSO does not return an error (it clear cr0.so on returning). */
|
|
|
981dc9 |
+ INTERNAL_SYSCALL_DECL (err);
|
|
|
981dc9 |
+ result =
|
|
|
981dc9 |
+ INTERNAL_VSYSCALL_NO_SYSCALL_FALLBACK (get_tbfreq, err, uint64_t, 0);
|
|
|
981dc9 |
+#else
|
|
|
981dc9 |
+ /* We read the information from the /proc filesystem. /proc/cpuinfo
|
|
|
981dc9 |
+ contains at least one line like:
|
|
|
981dc9 |
+ timebase : 33333333
|
|
|
981dc9 |
+ We search for this line and convert the number into an integer. */
|
|
|
981dc9 |
+ int fd = __open_nocancel ("/proc/cpuinfo", O_RDONLY);
|
|
|
981dc9 |
+ if (__glibc_likely (fd != -1))
|
|
|
981dc9 |
+ return result;
|
|
|
981dc9 |
+
|
|
|
981dc9 |
+ /* The timebase will be in the 1st 1024 bytes for systems with up
|
|
|
981dc9 |
+ to 8 processors. If the first read returns less then 1024
|
|
|
981dc9 |
+ bytes read, we have the whole cpuinfo and can start the scan.
|
|
|
981dc9 |
+ Otherwise we will have to read more to insure we have the
|
|
|
981dc9 |
+ timebase value in the scan. */
|
|
|
981dc9 |
+ char buf[1024];
|
|
|
981dc9 |
+ ssize_t n;
|
|
|
981dc9 |
+
|
|
|
981dc9 |
+ n = __read_nocancel (fd, buf, sizeof (buf));
|
|
|
981dc9 |
+ if (n == sizeof (buf))
|
|
|
981dc9 |
+ {
|
|
|
981dc9 |
+ /* We are here because the 1st read returned exactly sizeof
|
|
|
981dc9 |
+ (buf) bytes. This implies that we are not at EOF and may
|
|
|
981dc9 |
+ not have read the timebase value yet. So we need to read
|
|
|
981dc9 |
+ more bytes until we know we have EOF. We copy the lower
|
|
|
981dc9 |
+ half of buf to the upper half and read sizeof (buf)/2
|
|
|
981dc9 |
+ bytes into the lower half of buf and repeat until we
|
|
|
981dc9 |
+ reach EOF. We can assume that the timebase will be in
|
|
|
981dc9 |
+ the last 512 bytes of cpuinfo, so two 512 byte half_bufs
|
|
|
981dc9 |
+ will be sufficient to contain the timebase and will
|
|
|
981dc9 |
+ handle the case where the timebase spans the half_buf
|
|
|
981dc9 |
+ boundry. */
|
|
|
981dc9 |
+ const ssize_t half_buf = sizeof (buf) / 2;
|
|
|
981dc9 |
+ while (n >= half_buf)
|
|
|
981dc9 |
+ {
|
|
|
981dc9 |
+ memcpy (buf, buf + half_buf, half_buf);
|
|
|
981dc9 |
+ n = __read_nocancel (fd, buf + half_buf, half_buf);
|
|
|
981dc9 |
+ }
|
|
|
981dc9 |
+ if (n >= 0)
|
|
|
981dc9 |
+ n += half_buf;
|
|
|
981dc9 |
+ }
|
|
|
981dc9 |
+ __close_nocancel (fd);
|
|
|
981dc9 |
+
|
|
|
981dc9 |
+ if (__glibc_likely (n > 0))
|
|
|
981dc9 |
+ {
|
|
|
981dc9 |
+ char *mhz = memmem (buf, n, "timebase", 7);
|
|
|
981dc9 |
+
|
|
|
981dc9 |
+ if (__glibc_likely (mhz != NULL))
|
|
|
981dc9 |
+ {
|
|
|
981dc9 |
+ char *endp = buf + n;
|
|
|
981dc9 |
+
|
|
|
981dc9 |
+ /* Search for the beginning of the string. */
|
|
|
981dc9 |
+ while (mhz < endp && (*mhz < '0' || *mhz > '9') && *mhz != '\n')
|
|
|
981dc9 |
+ ++mhz;
|
|
|
981dc9 |
+
|
|
|
981dc9 |
+ while (mhz < endp && *mhz != '\n')
|
|
|
981dc9 |
+ {
|
|
|
981dc9 |
+ if (*mhz >= '0' && *mhz <= '9')
|
|
|
981dc9 |
+ {
|
|
|
981dc9 |
+ result *= 10;
|
|
|
981dc9 |
+ result += *mhz - '0';
|
|
|
981dc9 |
+ }
|
|
|
981dc9 |
+
|
|
|
981dc9 |
+ ++mhz;
|
|
|
981dc9 |
+ }
|
|
|
981dc9 |
+ }
|
|
|
981dc9 |
+ }
|
|
|
981dc9 |
+#endif
|
|
|
981dc9 |
+
|
|
|
981dc9 |
+ return result;
|
|
|
981dc9 |
}
|
|
|
981dc9 |
weak_alias (__get_timebase_freq, __ppc_get_timebase_freq)
|
|
|
981dc9 |
diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c b/sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c
|
|
|
981dc9 |
deleted file mode 100644
|
|
|
981dc9 |
index 6838a77a769ddae8..0000000000000000
|
|
|
981dc9 |
--- a/sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c
|
|
|
981dc9 |
+++ /dev/null
|
|
|
981dc9 |
@@ -1,250 +0,0 @@
|
|
|
981dc9 |
-/* Get frequency of the system processor. sparc64 version.
|
|
|
981dc9 |
- Copyright (C) 2001-2018 Free Software Foundation, Inc.
|
|
|
981dc9 |
- This file is part of the GNU C Library.
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- The GNU C Library is free software; you can redistribute it and/or
|
|
|
981dc9 |
- modify it under the terms of the GNU Lesser General Public
|
|
|
981dc9 |
- License as published by the Free Software Foundation; either
|
|
|
981dc9 |
- version 2.1 of the License, or (at your option) any later version.
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- The GNU C Library is distributed in the hope that it will be useful,
|
|
|
981dc9 |
- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
981dc9 |
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
981dc9 |
- Lesser General Public License for more details.
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- You should have received a copy of the GNU Lesser General Public
|
|
|
981dc9 |
- License along with the GNU C Library; if not, see
|
|
|
981dc9 |
- <http://www.gnu.org/licenses/>. */
|
|
|
981dc9 |
-
|
|
|
981dc9 |
-#include <ctype.h>
|
|
|
981dc9 |
-#include <fcntl.h>
|
|
|
981dc9 |
-#include <string.h>
|
|
|
981dc9 |
-#include <unistd.h>
|
|
|
981dc9 |
-#include <dirent.h>
|
|
|
981dc9 |
-#include <stdlib.h>
|
|
|
981dc9 |
-#include <inttypes.h>
|
|
|
981dc9 |
-#include <sys/ioctl.h>
|
|
|
981dc9 |
-#include <asm/openpromio.h>
|
|
|
981dc9 |
-
|
|
|
981dc9 |
-static hp_timing_t
|
|
|
981dc9 |
-__get_clockfreq_via_cpuinfo (void)
|
|
|
981dc9 |
-{
|
|
|
981dc9 |
- hp_timing_t result;
|
|
|
981dc9 |
- int fd;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- result = 0;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- fd = __open ("/proc/cpuinfo", O_RDONLY);
|
|
|
981dc9 |
- if (fd != -1)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- char buf[8192];
|
|
|
981dc9 |
- ssize_t n;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- n = __read (fd, buf, sizeof buf);
|
|
|
981dc9 |
- if (n > 0)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- char *mhz = memmem (buf, n, "Cpu0ClkTck", 7);
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- if (mhz != NULL)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- char *endp = buf + n;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- /* Search for the beginning of the string. */
|
|
|
981dc9 |
- while (mhz < endp
|
|
|
981dc9 |
- && (*mhz < '0' || *mhz > '9')
|
|
|
981dc9 |
- && (*mhz < 'a' || *mhz > 'f')
|
|
|
981dc9 |
- && *mhz != '\n')
|
|
|
981dc9 |
- ++mhz;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- while (mhz < endp && *mhz != '\n')
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- if ((*mhz >= '0' && *mhz <= '9') ||
|
|
|
981dc9 |
- (*mhz >= 'a' && *mhz <= 'f'))
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- result <<= 4;
|
|
|
981dc9 |
- if (*mhz >= '0' && *mhz <= '9')
|
|
|
981dc9 |
- result += *mhz - '0';
|
|
|
981dc9 |
- else
|
|
|
981dc9 |
- result += (*mhz - 'a') + 10;
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- ++mhz;
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- __close (fd);
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- return result;
|
|
|
981dc9 |
-}
|
|
|
981dc9 |
-
|
|
|
981dc9 |
-static hp_timing_t
|
|
|
981dc9 |
-__get_clockfreq_via_proc_openprom (void)
|
|
|
981dc9 |
-{
|
|
|
981dc9 |
- hp_timing_t result;
|
|
|
981dc9 |
- int obp_fd;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- result = 0;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- obp_fd = __open ("/proc/openprom", O_RDONLY);
|
|
|
981dc9 |
- if (obp_fd != -1)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- unsigned long int buf[4096 / sizeof (unsigned long int)];
|
|
|
981dc9 |
- struct dirent64 *dirp = (struct dirent64 *) buf;
|
|
|
981dc9 |
- ssize_t len;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- while ((len = __getdents64 (obp_fd, (char *) dirp, sizeof (buf))) > 0)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- struct dirent64 *this_dirp = dirp;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- while (len > 0)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- char node[strlen ("/proc/openprom/")
|
|
|
981dc9 |
- + _D_ALLOC_NAMLEN (this_dirp)
|
|
|
981dc9 |
- + strlen ("/clock-frequency")];
|
|
|
981dc9 |
- char *prop;
|
|
|
981dc9 |
- int fd;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- /* Note that
|
|
|
981dc9 |
- strlen("/clock-frequency") > strlen("/device_type")
|
|
|
981dc9 |
- */
|
|
|
981dc9 |
- __stpcpy (prop = __stpcpy (__stpcpy (node, "/proc/openprom/"),
|
|
|
981dc9 |
- this_dirp->d_name),
|
|
|
981dc9 |
- "/device_type");
|
|
|
981dc9 |
- fd = __open (node, O_RDONLY);
|
|
|
981dc9 |
- if (fd != -1)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- char type_string[128];
|
|
|
981dc9 |
- int ret;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- ret = __read (fd, type_string, sizeof (type_string));
|
|
|
981dc9 |
- if (ret > 0 && strncmp (type_string, "'cpu'", 5) == 0)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- int clkfreq_fd;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- __stpcpy (prop, "/clock-frequency");
|
|
|
981dc9 |
- clkfreq_fd = __open (node, O_RDONLY);
|
|
|
981dc9 |
- if (clkfreq_fd != -1)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- if (__read (clkfreq_fd, type_string,
|
|
|
981dc9 |
- sizeof (type_string)) > 0)
|
|
|
981dc9 |
- result = (hp_timing_t)
|
|
|
981dc9 |
- strtoumax (type_string, NULL, 16);
|
|
|
981dc9 |
- __close (clkfreq_fd);
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- __close (fd);
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- if (result != 0)
|
|
|
981dc9 |
- break;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- len -= this_dirp->d_reclen;
|
|
|
981dc9 |
- this_dirp = (struct dirent64 *)
|
|
|
981dc9 |
- ((char *) this_dirp + this_dirp->d_reclen);
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- if (result != 0)
|
|
|
981dc9 |
- break;
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- __close (obp_fd);
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- return result;
|
|
|
981dc9 |
-}
|
|
|
981dc9 |
-
|
|
|
981dc9 |
-static void set_obp_int (struct openpromio *op, int val)
|
|
|
981dc9 |
-{
|
|
|
981dc9 |
- char *cp = op->oprom_array;
|
|
|
981dc9 |
- int *ip = (int *) cp;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- *ip = val;
|
|
|
981dc9 |
-}
|
|
|
981dc9 |
-
|
|
|
981dc9 |
-static int get_obp_int (struct openpromio *op)
|
|
|
981dc9 |
-{
|
|
|
981dc9 |
- char *cp = op->oprom_array;
|
|
|
981dc9 |
- int *ip = (int *) cp;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- return *ip;
|
|
|
981dc9 |
-}
|
|
|
981dc9 |
-
|
|
|
981dc9 |
-static hp_timing_t
|
|
|
981dc9 |
-__get_clockfreq_via_dev_openprom (void)
|
|
|
981dc9 |
-{
|
|
|
981dc9 |
- hp_timing_t result;
|
|
|
981dc9 |
- int obp_dev_fd;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- result = 0;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- obp_dev_fd = __open ("/dev/openprom", O_RDONLY);
|
|
|
981dc9 |
- if (obp_dev_fd != -1)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- char obp_buf[8192];
|
|
|
981dc9 |
- struct openpromio *obp_cmd = (struct openpromio *)obp_buf;
|
|
|
981dc9 |
- int ret;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- obp_cmd->oprom_size =
|
|
|
981dc9 |
- sizeof (obp_buf) - sizeof (unsigned int);
|
|
|
981dc9 |
- set_obp_int (obp_cmd, 0);
|
|
|
981dc9 |
- ret = __ioctl (obp_dev_fd, OPROMCHILD, (char *) obp_cmd);
|
|
|
981dc9 |
- if (ret == 0)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- int cur_node = get_obp_int (obp_cmd);
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- while (cur_node != 0 && cur_node != -1)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- obp_cmd->oprom_size = sizeof (obp_buf) - sizeof (unsigned int);
|
|
|
981dc9 |
- strcpy (obp_cmd->oprom_array, "device_type");
|
|
|
981dc9 |
- ret = __ioctl (obp_dev_fd, OPROMGETPROP, (char *) obp_cmd);
|
|
|
981dc9 |
- if (ret == 0
|
|
|
981dc9 |
- && strncmp (obp_cmd->oprom_array, "cpu", 3) == 0)
|
|
|
981dc9 |
- {
|
|
|
981dc9 |
- obp_cmd->oprom_size = (sizeof (obp_buf)
|
|
|
981dc9 |
- - sizeof (unsigned int));
|
|
|
981dc9 |
- strcpy (obp_cmd->oprom_array, "clock-frequency");
|
|
|
981dc9 |
- ret = __ioctl (obp_dev_fd, OPROMGETPROP, (char *) obp_cmd);
|
|
|
981dc9 |
- if (ret == 0)
|
|
|
981dc9 |
- result = (hp_timing_t) get_obp_int (obp_cmd);
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- obp_cmd->oprom_size = sizeof (obp_buf) - sizeof (unsigned int);
|
|
|
981dc9 |
- set_obp_int (obp_cmd, cur_node);
|
|
|
981dc9 |
- ret = __ioctl (obp_dev_fd, OPROMNEXT, (char *) obp_cmd);
|
|
|
981dc9 |
- if (ret < 0)
|
|
|
981dc9 |
- break;
|
|
|
981dc9 |
- cur_node = get_obp_int (obp_cmd);
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
- }
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- return result;
|
|
|
981dc9 |
-}
|
|
|
981dc9 |
-
|
|
|
981dc9 |
-hp_timing_t
|
|
|
981dc9 |
-__get_clockfreq (void)
|
|
|
981dc9 |
-{
|
|
|
981dc9 |
- static hp_timing_t result;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- /* If this function was called before, we know the result. */
|
|
|
981dc9 |
- if (result != 0)
|
|
|
981dc9 |
- return result;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- /* We first read the information from the /proc/cpuinfo file.
|
|
|
981dc9 |
- It contains at least one line like
|
|
|
981dc9 |
- Cpu0ClkTick : 000000002cb41780
|
|
|
981dc9 |
- We search for this line and convert the number in an integer. */
|
|
|
981dc9 |
- result = __get_clockfreq_via_cpuinfo ();
|
|
|
981dc9 |
- if (result != 0)
|
|
|
981dc9 |
- return result;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- /* If that did not work, try to find an OpenPROM node
|
|
|
981dc9 |
- with device_type equal to 'cpu' using /dev/openprom
|
|
|
981dc9 |
- and fetch the clock-frequency property from there. */
|
|
|
981dc9 |
- result = __get_clockfreq_via_dev_openprom ();
|
|
|
981dc9 |
- if (result != 0)
|
|
|
981dc9 |
- return result;
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- /* Finally, try the same lookup as above but using /proc/openprom. */
|
|
|
981dc9 |
- result = __get_clockfreq_via_proc_openprom ();
|
|
|
981dc9 |
-
|
|
|
981dc9 |
- return result;
|
|
|
981dc9 |
-}
|