cpuid_arm64.c

/**************************************************************************
  Copyright (c) 2013, The OpenBLAS Project
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  derived from this software without specific prior written permission.
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  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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#include <string.h>

#define CPU_UNKNOWN     	0
#define CPU_ARMV8       	1
#define CPU_CORTEXA57       	2

static char *cpuname[] = {
  "UNKNOWN",
  "ARMV8" ,
  "CORTEXA57"
};

static char *cpuname_lower[] = {
  "unknown",
  "armv8" ,
  "cortexa57"
};

int get_feature(char *search)
{

#ifdef linux
	FILE *infile;
  	char buffer[2048], *p,*t;
  	p = (char *) NULL ;

  	infile = fopen("/proc/cpuinfo", "r");

	while (fgets(buffer, sizeof(buffer), infile))
	{

		if (!strncmp("Features", buffer, 8))
		{
			p = strchr(buffer, ':') + 2;
			break;
		}
	}

	fclose(infile);


	if( p == NULL ) return 0;

	t = strtok(p," ");
	while( t = strtok(NULL," "))
	{
		if (!strcmp(t, search))   { return(1); }
	}

#endif
	return(0);
}


int detect(void)
{

#ifdef linux

	FILE *infile;
  	char buffer[512], *p;
  	p = (char *) NULL ;

  	infile = fopen("/proc/cpuinfo", "r");
	while (fgets(buffer, sizeof(buffer), infile))
	{

		if (!strncmp("CPU part", buffer, 8))
		{
			p = strchr(buffer, ':') + 2;
			break;
		}
	}

	fclose(infile);
	if(p != NULL) {
	  if (strstr(p, "0xd07")) {
	    return CPU_CORTEXA57;
	  }
	}

	p = (char *) NULL ;
	infile = fopen("/proc/cpuinfo", "r");
	while (fgets(buffer, sizeof(buffer), infile))
	{

		if ((!strncmp("model name", buffer, 10)) || (!strncmp("Processor", buffer, 9)) ||
		    (!strncmp("CPU architecture", buffer, 16)))
		{
			p = strchr(buffer, ':') + 2;
			break;
      		}
  	}

  	fclose(infile);

  	if(p != NULL)
	{

		if (strstr(p, "AArch64"))
		{
			return CPU_ARMV8;

		}


	}
#endif

	return CPU_UNKNOWN;
}

char *get_corename(void)
{
	return cpuname[detect()];
}

void get_architecture(void)
{
	printf("ARM64");
}

void get_subarchitecture(void)
{
	int d = detect();
	printf("%s", cpuname[d]);
}

void get_subdirname(void)
{
	printf("arm64");
}

void get_cpuconfig(void)
{

	int d = detect();
	switch (d)
	{

		case CPU_ARMV8:
    			printf("#define ARMV8\n");
    			printf("#define L1_DATA_SIZE 32768\n");
    			printf("#define L1_DATA_LINESIZE 64\n");
    			printf("#define L2_SIZE 262144\n");
    			printf("#define L2_LINESIZE 64\n");
    			printf("#define DTB_DEFAULT_ENTRIES 64\n");
    			printf("#define DTB_SIZE 4096\n");
    			printf("#define L2_ASSOCIATIVE 4\n");
			break;

		case CPU_CORTEXA57:
			printf("#define CORTEXA57\n");
			printf("#define HAVE_VFP\n");
			printf("#define HAVE_VFPV3\n");
			printf("#define HAVE_NEON\n");
			printf("#define HAVE_VFPV4\n");
			printf("#define L1_CODE_SIZE 49152\n");
			printf("#define L1_CODE_LINESIZE 64\n");
			printf("#define L1_CODE_ASSOCIATIVE 3\n");
			printf("#define L1_DATA_SIZE 32768\n");
			printf("#define L1_DATA_LINESIZE 64\n");
			printf("#define L1_DATA_ASSOCIATIVE 2\n");
			printf("#define L2_SIZE 2097152\n");
			printf("#define L2_LINESIZE 64\n");
			printf("#define L2_ASSOCIATIVE 16\n");
			break;
	}
}


void get_libname(void)
{
	int d = detect();
	printf("%s", cpuname_lower[d]);
}

void get_features(void)
{

#ifdef linux
	FILE *infile;
  	char buffer[2048], *p,*t;
  	p = (char *) NULL ;

  	infile = fopen("/proc/cpuinfo", "r");

	while (fgets(buffer, sizeof(buffer), infile))
	{

		if (!strncmp("Features", buffer, 8))
		{
			p = strchr(buffer, ':') + 2;
			break;
      		}
  	}

  	fclose(infile);


	if( p == NULL ) return;

	t = strtok(p," ");
	while( t = strtok(NULL," "))
	{
	}

#endif
	return;
}