sl@0: /*
sl@0:  * LIBOIL - Library of Optimized Inner Loops
sl@0:  * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org>
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
sl@0:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
sl@0:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
sl@0:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
sl@0:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
sl@0:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
sl@0:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
sl@0:  * POSSIBILITY OF SUCH DAMAGE.
sl@0:  */
sl@0: 
sl@0: #ifdef HAVE_CONFIG_H
sl@0: #include "config.h"
sl@0: #endif
sl@0: #include <liboil/liboilfunction.h>
sl@0: #include <liboil/liboildebug.h>
sl@0: #include <liboil/liboilcpu.h>
sl@0: #include <liboil/liboilfault.h>
sl@0: #include <liboil/liboilutils.h>
sl@0: 
sl@0: #include <unistd.h>
sl@0: #include <fcntl.h>
sl@0: #include <stdlib.h>
sl@0: #include <string.h>
sl@0: #include <stdio.h>
sl@0: #include <setjmp.h>
sl@0: #include <signal.h>
sl@0: #include <sys/time.h>
sl@0: #include <time.h>
sl@0: 
sl@0: /***** arm *****/
sl@0: 
sl@0: //#ifdef __arm__		
sl@0: #if 0
sl@0: static unsigned long
sl@0: oil_profile_stamp_xscale(void)
sl@0: {
sl@0:   unsigned int ts;
sl@0:   __asm__ __volatile__ (
sl@0:       "  mrc p14, 0, %0, c1, c0, 0 \n"
sl@0:       : "=r" (ts));
sl@0:   return ts;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: static void
sl@0: oil_cpu_arm_getflags_cpuinfo (char *cpuinfo)
sl@0: {
sl@0:   char *cpuinfo_flags;
sl@0:   char **flags;
sl@0:   char **f;
sl@0: 
sl@0:   cpuinfo_flags = get_cpuinfo_line(cpuinfo, "Features");
sl@0:   if (cpuinfo_flags == NULL) {
sl@0:     free (cpuinfo);
sl@0:     return;
sl@0:   }
sl@0: 
sl@0:   flags = strsplit(cpuinfo_flags);
sl@0:   for (f = flags; *f; f++) {
sl@0:     if (strcmp (*f, "edsp") == 0) {
sl@0:       OIL_DEBUG ("cpu feature %s", *f);
sl@0:       oil_cpu_flags |= OIL_IMPL_FLAG_EDSP;
sl@0:     }
sl@0:     if (strcmp (*f, "vfp") == 0) {
sl@0:       OIL_DEBUG ("cpu feature %s", *f);
sl@0:       oil_cpu_flags |= OIL_IMPL_FLAG_VFP;
sl@0:     }
sl@0: 
sl@0:     free (*f);
sl@0:   }
sl@0:   free (flags);
sl@0:   free (cpuinfo_flags);
sl@0: }
sl@0: 
sl@0: static char *
sl@0: get_proc_cpuinfo (void)
sl@0: {
sl@0:   char *cpuinfo;
sl@0:   int fd;
sl@0:   int n;
sl@0: 
sl@0:   cpuinfo = malloc(4096);
sl@0:   if (cpuinfo == NULL) return NULL;
sl@0: 
sl@0:   fd = open("/proc/cpuinfo", O_RDONLY);
sl@0:   if (fd < 0) {
sl@0:     free (cpuinfo);
sl@0:     return NULL;
sl@0:   }
sl@0: 
sl@0:   n = read(fd, cpuinfo, 4095);
sl@0:   if (n < 0) {
sl@0:     free (cpuinfo);
sl@0:     close (fd);
sl@0:     return NULL;
sl@0:   }
sl@0:   cpuinfo[n] = 0;
sl@0: 
sl@0:   close (fd);
sl@0: 
sl@0:   return cpuinfo;
sl@0: }
sl@0: #ifdef __SYMBIAN32__
sl@0: EXPORT_C
sl@0: #endif
sl@0: void
sl@0: oil_cpu_detect_arch(void)
sl@0: {
sl@0: #ifdef __linux__
sl@0:   int arm_implementer = 0;
sl@0:   int arm_arch;
sl@0:   char *cpuinfo;
sl@0:   char *s;
sl@0: 
sl@0:   cpuinfo = get_proc_cpuinfo();
sl@0:   if (cpuinfo == NULL) return;
sl@0: 
sl@0:   s = get_cpuinfo_line(cpuinfo, "CPU implementer");
sl@0:   if (s) {
sl@0:     arm_implementer = strtoul (s, NULL, 0);
sl@0:     free(s);
sl@0:   }
sl@0: 
sl@0:   switch(arm_implementer) {
sl@0:     case 0x69: /* Intel */
sl@0:     case 0x41: /* ARM */
sl@0:       /* ARM chips are known to not have timestamping available from 
sl@0:        * user space */
sl@0:       break;
sl@0:     default:
sl@0:       break;
sl@0:   }
sl@0: 
sl@0:   s = get_cpuinfo_line(cpuinfo, "CPU architecture");
sl@0:   if (s) {
sl@0:     arm_arch = strtoul (s, NULL, 0);
sl@0:     if (arm_arch >= 6)
sl@0:       oil_cpu_flags |= OIL_IMPL_FLAG_ARM6;
sl@0:     free(s);
sl@0:   }
sl@0: 
sl@0:   oil_cpu_arm_getflags_cpuinfo (cpuinfo);
sl@0:   free (cpuinfo);
sl@0: #endif
sl@0: }
sl@0: //#endif   
sl@0: 
sl@0: