michael@0: /*
michael@0:  * Copyright © 2000 SuSE, Inc.
michael@0:  * Copyright © 2007 Red Hat, Inc.
michael@0:  *
michael@0:  * Permission to use, copy, modify, distribute, and sell this software and its
michael@0:  * documentation for any purpose is hereby granted without fee, provided that
michael@0:  * the above copyright notice appear in all copies and that both that
michael@0:  * copyright notice and this permission notice appear in supporting
michael@0:  * documentation, and that the name of SuSE not be used in advertising or
michael@0:  * publicity pertaining to distribution of the software without specific,
michael@0:  * written prior permission.  SuSE makes no representations about the
michael@0:  * suitability of this software for any purpose.  It is provided "as is"
michael@0:  * without express or implied warranty.
michael@0:  *
michael@0:  * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
michael@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE
michael@0:  * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
michael@0:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
michael@0:  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
michael@0:  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
michael@0:  */
michael@0: #ifdef HAVE_CONFIG_H
michael@0: #include <config.h>
michael@0: #endif
michael@0: 
michael@0: #include "pixman-private.h"
michael@0: 
michael@0: #if defined(USE_MIPS_DSPR2) || defined(USE_LOONGSON_MMI)
michael@0: 
michael@0: #include <string.h>
michael@0: #include <stdlib.h>
michael@0: 
michael@0: static pixman_bool_t
michael@0: have_feature (const char *search_string)
michael@0: {
michael@0: #if defined (__linux__) /* linux ELF */
michael@0:     /* Simple detection of MIPS features at runtime for Linux.
michael@0:      * It is based on /proc/cpuinfo, which reveals hardware configuration
michael@0:      * to user-space applications.  According to MIPS (early 2010), no similar
michael@0:      * facility is universally available on the MIPS architectures, so it's up
michael@0:      * to individual OSes to provide such.
michael@0:      */
michael@0:     const char *file_name = "/proc/cpuinfo";
michael@0:     char cpuinfo_line[256];
michael@0:     FILE *f = NULL;
michael@0: 
michael@0:     if ((f = fopen (file_name, "r")) == NULL)
michael@0:         return FALSE;
michael@0: 
michael@0:     while (fgets (cpuinfo_line, sizeof (cpuinfo_line), f) != NULL)
michael@0:     {
michael@0:         if (strstr (cpuinfo_line, search_string) != NULL)
michael@0:         {
michael@0:             fclose (f);
michael@0:             return TRUE;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     fclose (f);
michael@0: #endif
michael@0: 
michael@0:     /* Did not find string in the proc file, or not Linux ELF. */
michael@0:     return FALSE;
michael@0: }
michael@0: 
michael@0: #endif
michael@0: 
michael@0: pixman_implementation_t *
michael@0: _pixman_mips_get_implementations (pixman_implementation_t *imp)
michael@0: {
michael@0: #ifdef USE_LOONGSON_MMI
michael@0:     /* I really don't know if some Loongson CPUs don't have MMI. */
michael@0:     if (!_pixman_disabled ("loongson-mmi") && have_feature ("Loongson"))
michael@0: 	imp = _pixman_implementation_create_mmx (imp);
michael@0: #endif
michael@0: 
michael@0: #ifdef USE_MIPS_DSPR2
michael@0:     if (!_pixman_disabled ("mips-dspr2"))
michael@0:     {
michael@0: 	int already_compiling_everything_for_dspr2 = 0;
michael@0: #if defined(__mips_dsp) && (__mips_dsp_rev >= 2)
michael@0: 	already_compiling_everything_for_dspr2 = 1;
michael@0: #endif
michael@0: 	if (already_compiling_everything_for_dspr2 ||
michael@0: 	    /* Only currently available MIPS core that supports DSPr2 is 74K. */
michael@0: 	    have_feature ("MIPS 74K"))
michael@0: 	{
michael@0: 	    imp = _pixman_implementation_create_mips_dspr2 (imp);
michael@0: 	}
michael@0:     }
michael@0: #endif
michael@0: 
michael@0:     return imp;
michael@0: }