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Update.
2001-04-25 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/sparc/sparc64/bits/time.h: Move to... * sysdeps/unix/sysv/linux/sparc/bits/time.h: ...here. * sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/bits/time.h: Remove. * sysdeps/unix/sysv/linux/sparc/sparc64/bits/socket.h: Move to... * sysdeps/unix/sysv/linux/sparc/bits/socket.h: ...here. Adjust struct msghdr for __WORDSIZE == 32. * sysdeps/unix/sysv/linux/sparc/sparc64/bits/statvfs.h: Move to... * sysdeps/unix/sysv/linux/sparc/bits/statvfs.h: ...here. Adjust for __WORDSIZE == 32. * sysdeps/unix/sysv/linux/sparc/sparc64/bits/siginfo.h: Remove. * sysdeps/unix/sysv/linux/sparc/sparc32/sparcv9/get_clockfreq.c: New file. * sysdeps/unix/sysv/linux/sparc/sparc64/longjmp.S (__libc_siglongjmp): Rename from longjmp, make longjmp weak alias to it. 2001-04-24 David S. Miller <davem@redhat.com> * sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c: New file.
This commit is contained in:
Ulrich Drepper
240
sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c
Normal file
240
sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c
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@ -0,0 +1,240 @@
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/* Get frequency of the system processor. sparc64 version.
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Copyright (C) 2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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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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#include <dirent.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <libc-internal.h>
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#include <asm/openpromio.h>
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static hp_timing_t
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__get_clockfreq_via_cpuinfo (void)
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{
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hp_timing_t result;
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int fd;
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result = 0;
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fd = open ("/proc/cpuinfo", O_RDONLY);
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if (fd != -1)
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{
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char buf[8192];
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ssize_t n;
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n = read (fd, buf, sizeof buf);
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if (n > 0)
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{
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char *mhz = memmem (buf, n, "Cpu0ClkTck", 7);
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if (mhz != NULL)
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{
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char *endp = buf + n;
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/* Search for the beginning of the string. */
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while (mhz < endp
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&& (*mhz < '0' || *mhz > '9')
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&& (*mhz < 'a' || *mhz > 'f')
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&& *mhz != '\n')
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++mhz;
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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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(*mhz >= 'a' && *mhz <= 'f'))
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{
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result <<= 4;
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if (*mhz >= '0' && *mhz <= '9')
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result += *mhz - '0';
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else
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result += (*mhz - 'a') + 10;
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}
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++mhz;
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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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return result;
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}
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static hp_timing_t
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__get_clockfreq_via_proc_openprom (void)
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{
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hp_timing_t result;
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int obp_fd;
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result = 0;
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obp_fd = open ("/proc/openprom", O_RDONLY);
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if (obp_fd != -1)
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{
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unsigned long buf[4096 / sizeof (unsigned long)];
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struct dirent *dirp = (struct dirent *) buf;
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off_t dbase = (off_t) 0;
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int len;
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while ((len = getdirentries (obp_fd, (char *) dirp,
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sizeof (buf), &dbase)) > 0)
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{
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struct dirent *this_dirp = dirp;
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while (len > 0)
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{
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char node_name[strlen ("/proc/openprom/")
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+ this_dirp->d_reclen
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+ strlen ("/clock-frequency")];
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int fd;
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strcpy (node_name, "/proc/openprom/");
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strcat (node_name, this_dirp->d_name);
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strcat (node_name, "/device_type");
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fd = open (node_name, O_RDONLY);
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if (fd != -1)
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{
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char type_string[128];
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int ret;
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ret = read (fd, type_string, sizeof (type_string));
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if (ret > 0 && !strncmp (type_string, "'cpu'", 5))
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{
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int clkfreq_fd;
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strcpy (node_name, "/proc/openprom/");
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strcat (node_name, this_dirp->d_name);
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strcat (node_name, "/clock-frequency");
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clkfreq_fd = open (node_name, O_RDONLY);
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if (fd != -1)
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{
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if (read (clkfreq_fd, type_string,
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sizeof (type_string)) > 0)
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result = (hp_timing_t)
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strtol (type_string, (char **)NULL, 16);
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close (clkfreq_fd);
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}
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}
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close (fd);
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}
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if (result != 0)
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break;
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len -= this_dirp->d_reclen;
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this_dirp = (struct dirent *)
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((char *)this_dirp + this_dirp->d_reclen);
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}
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if (result != 0)
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break;
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}
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close (obp_fd);
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}
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return result;
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}
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static hp_timing_t
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__get_clockfreq_via_dev_openprom (void)
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{
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hp_timing_t result;
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int obp_dev_fd;
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result = 0;
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obp_dev_fd = open ("/dev/openprom", O_RDONLY);
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if (obp_dev_fd != -1)
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{
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char obp_buf[8192];
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struct openpromio *obp_cmd = (struct openpromio *)obp_buf;
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int ret;
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obp_cmd->oprom_size =
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sizeof (obp_buf) - sizeof (unsigned int);
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*(int *)obp_cmd->oprom_array = 0;
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ret = ioctl (obp_dev_fd, OPROMCHILD, (char *) obp_cmd);
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if (ret == 0)
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{
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int cur_node = *(int *)obp_cmd->oprom_array;
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while (cur_node != 0 && cur_node != -1)
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{
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obp_cmd->oprom_size = sizeof (obp_buf) - sizeof (unsigned int);
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strcpy (obp_cmd->oprom_array, "device_type");
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ret = ioctl (obp_dev_fd, OPROMGETPROP, (char *) obp_cmd);
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if (ret == 0
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&& !strncmp (obp_cmd->oprom_array, "cpu", 3))
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{
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obp_cmd->oprom_size = sizeof (obp_buf) - sizeof (unsigned int);
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strcpy (obp_cmd->oprom_array, "clock-frequency");
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ret = ioctl (obp_dev_fd, OPROMGETPROP, (char *) obp_cmd);
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if (ret == 0)
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{
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result = (hp_timing_t)
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*(unsigned int *)obp_cmd->oprom_array;
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}
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}
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obp_cmd->oprom_size = sizeof (obp_buf) - sizeof (unsigned int);
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*(int *)obp_cmd->oprom_array = cur_node;
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ret = ioctl (obp_dev_fd, OPROMNEXT, (char *) obp_cmd);
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if (ret < 0)
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break;
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cur_node = *(int *)obp_cmd->oprom_array;
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}
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}
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}
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return result;
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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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static hp_timing_t result;
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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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/* We first read the information from the /proc/cpuinfo file.
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It contains at least one line like
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Cpu0ClkTick : 000000002cb41780
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We search for this line and convert the number in an integer. */
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result = __get_clockfreq_via_cpuinfo ();
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if (result != 0)
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return result;
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/* If that did not work, try to find an OpenPROM node
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with device_type equal to 'cpu' using /dev/openprom
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and fetch the clock-frequency property from there. */
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result = __get_clockfreq_via_dev_openprom ();
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if (result != 0)
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return result;
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/* Finally, try the same lookup as above but using /proc/openprom. */
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result = __get_clockfreq_via_proc_openprom ();
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return result;
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}
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