cpuid_arm64.c

/**************************************************************************
  Copyright (c) 2013, The OpenBLAS Project
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  its contributors may be used to endorse or promote products
  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

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


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;

	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("model name", buffer, 10)) || (!strncmp("Processor", buffer, 9)))
		{
			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("ARM");
}

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

		case CPU_ARMV8:
			printf("ARMV8");
			break;

		default:
			printf("UNKNOWN");
			break;
	}
}

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;


	}
}


void get_libname(void)
{

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

		case CPU_ARMV8:
    			printf("armv8\n");
			break;

	}
}


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;
}