cpuid_arm64.c

/**************************************************************************
  Copyright (c) 2013, The OpenBLAS Project
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  modification, are permitted provided that the following conditions are
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  1. Redistributions of source code must retain the above copyright
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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
// Arm
#define CPU_CORTEXA53     2
#define CPU_CORTEXA57     3
#define CPU_CORTEXA72     4
#define CPU_CORTEXA73     5
#define CPU_NEOVERSEN1    11
// Qualcomm
#define CPU_FALKOR        6
// Cavium
#define CPU_THUNDERX      7
#define CPU_THUNDERX2T99  8
//Hisilicon
#define CPU_TSV110        9
// Ampere
#define CPU_EMAG8180	 10

static char *cpuname[] = {
  "UNKNOWN",
  "ARMV8" ,
  "CORTEXA53",
  "CORTEXA57",
  "CORTEXA72",
  "CORTEXA73",
  "FALKOR",
  "THUNDERX",
  "THUNDERX2T99",
  "TSV110",
  "EMAG8180",
  "NEOVERSEN1"
};

static char *cpuname_lower[] = {
  "unknown",
  "armv8",
  "cortexa53",
  "cortexa57",
  "cortexa72",
  "cortexa73",
  "falkor",
  "thunderx",
  "thunderx2t99",
  "tsv110",
  "emag8180",
  "neoversen1"
};

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, *cpu_part = NULL, *cpu_implementer = NULL;
	p = (char *) NULL ;

	infile = fopen("/proc/cpuinfo", "r");
	while (fgets(buffer, sizeof(buffer), infile)) {
		if ((cpu_part != NULL) && (cpu_implementer != NULL)) {
			break;
		}

		if ((cpu_part == NULL) && !strncmp("CPU part", buffer, 8)) {
			cpu_part = strchr(buffer, ':') + 2;
			cpu_part = strdup(cpu_part);
		} else if ((cpu_implementer == NULL) && !strncmp("CPU implementer", buffer, 15)) {
			cpu_implementer = strchr(buffer, ':') + 2;
			cpu_implementer = strdup(cpu_implementer);
		}
	}

	fclose(infile);
	if(cpu_part != NULL && cpu_implementer != NULL) {
    // Arm
    if (strstr(cpu_implementer, "0x41")) {
      if (strstr(cpu_part, "0xd03"))
        return CPU_CORTEXA53;
      else if (strstr(cpu_part, "0xd07"))
        return CPU_CORTEXA57;
      else if (strstr(cpu_part, "0xd08"))
        return CPU_CORTEXA72;
      else if (strstr(cpu_part, "0xd09"))
        return CPU_CORTEXA73;
      else if (strstr(cpu_part, "0xd0c"))
        return CPU_NEOVERSEN1;
    }
    // Qualcomm
    else if (strstr(cpu_implementer, "0x51") && strstr(cpu_part, "0xc00"))
      return CPU_FALKOR;
    // Cavium
    else if (strstr(cpu_implementer, "0x43") && strstr(cpu_part, "0x0a1"))
			return CPU_THUNDERX;
    else if (strstr(cpu_implementer, "0x43") && strstr(cpu_part, "0x0af"))
			return CPU_THUNDERX2T99;
    // HiSilicon
    else if (strstr(cpu_implementer, "0x48") && strstr(cpu_part, "0xd01"))
                        return CPU_TSV110;
    // Ampere
    else if (strstr(cpu_implementer, "0x50") && strstr(cpu_part, "0x000"))
                        return CPU_EMAG8180;
	}

	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")) || (strstr(p, "8")))
		{
			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_cpucount(void)
{
int n=0;

#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("processor", buffer, 9))
		n++;
  	}

  	fclose(infile);

	printf("#define NUM_CORES %d\n",n);
#endif

}



void get_cpuconfig(void)
{

  // All arches should define ARMv8
  printf("#define ARMV8\n");
  printf("#define HAVE_NEON\n"); // This shouldn't be necessary
  printf("#define HAVE_VFPV4\n"); // This shouldn't be necessary

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

    case CPU_CORTEXA53:
      printf("#define %s\n", cpuname[d]);
      // Fall-through
		case CPU_ARMV8:
      // Minimum parameters for ARMv8 (based on A53)
    	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:
		case CPU_CORTEXA72:
		case CPU_CORTEXA73:
      // Common minimum settings for these Arm cores
      // Can change a lot, but we need to be conservative
      // TODO: detect info from /sys if possible
      printf("#define %s\n", cpuname[d]);
			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 524288\n");
			printf("#define L2_LINESIZE 64\n");
			printf("#define L2_ASSOCIATIVE 16\n");
			printf("#define DTB_DEFAULT_ENTRIES 64\n");
			printf("#define DTB_SIZE 4096\n");
			break;
		case CPU_NEOVERSEN1:
			printf("#define %s\n", cpuname[d]);
			printf("#define L1_CODE_SIZE 65536\n");
			printf("#define L1_CODE_LINESIZE 64\n");
			printf("#define L1_CODE_ASSOCIATIVE 4\n");
			printf("#define L1_DATA_SIZE 65536\n");
			printf("#define L1_DATA_LINESIZE 64\n");
			printf("#define L1_DATA_ASSOCIATIVE 4\n");
			printf("#define L2_SIZE 1048576\n");
			printf("#define L2_LINESIZE 64\n");
			printf("#define L2_ASSOCIATIVE 16\n");
			printf("#define DTB_DEFAULT_ENTRIES 64\n");
			printf("#define DTB_SIZE 4096\n");
			break;

    case CPU_FALKOR:
      printf("#define FALKOR\n");
      printf("#define L1_CODE_SIZE 65536\n");
      printf("#define L1_CODE_LINESIZE 64\n");
      printf("#define L1_DATA_SIZE 32768\n");
      printf("#define L1_DATA_LINESIZE 128\n");
      printf("#define L2_SIZE 524288\n");
      printf("#define L2_LINESIZE 64\n");
      printf("#define DTB_DEFAULT_ENTRIES 64\n");
      printf("#define DTB_SIZE 4096\n");
      printf("#define L2_ASSOCIATIVE 16\n");
      break;

		case CPU_THUNDERX:
			printf("#define THUNDERX\n");
			printf("#define L1_DATA_SIZE 32768\n");
			printf("#define L1_DATA_LINESIZE 128\n");
			printf("#define L2_SIZE 16777216\n");
			printf("#define L2_LINESIZE 128\n");
			printf("#define DTB_DEFAULT_ENTRIES 64\n");
			printf("#define DTB_SIZE 4096\n");
			printf("#define L2_ASSOCIATIVE 16\n");
			break;

		case CPU_THUNDERX2T99:
			printf("#define THUNDERX2T99                  \n");
			printf("#define L1_CODE_SIZE         32768    \n");
			printf("#define L1_CODE_LINESIZE     64       \n");
			printf("#define L1_CODE_ASSOCIATIVE  8        \n");
			printf("#define L1_DATA_SIZE         32768    \n");
			printf("#define L1_DATA_LINESIZE     64       \n");
			printf("#define L1_DATA_ASSOCIATIVE  8        \n");
			printf("#define L2_SIZE              262144   \n");
			printf("#define L2_LINESIZE          64       \n");
			printf("#define L2_ASSOCIATIVE       8        \n");
			printf("#define L3_SIZE              33554432 \n");
			printf("#define L3_LINESIZE          64       \n");
			printf("#define L3_ASSOCIATIVE       32       \n");
			printf("#define DTB_DEFAULT_ENTRIES  64       \n");
			printf("#define DTB_SIZE             4096     \n");
			break;
			
		case CPU_TSV110:
			printf("#define TSV110                        \n");
			printf("#define L1_CODE_SIZE         65536    \n");
			printf("#define L1_CODE_LINESIZE     64       \n");
			printf("#define L1_CODE_ASSOCIATIVE  4        \n");
			printf("#define L1_DATA_SIZE         65536    \n");
			printf("#define L1_DATA_LINESIZE     64       \n");
			printf("#define L1_DATA_ASSOCIATIVE  4        \n");
			printf("#define L2_SIZE              524228   \n");
			printf("#define L2_LINESIZE          64       \n");
			printf("#define L2_ASSOCIATIVE       8        \n");
			printf("#define DTB_DEFAULT_ENTRIES  64       \n");
			printf("#define DTB_SIZE             4096     \n");
			break;	

		case CPU_EMAG8180:
      // Minimum parameters for ARMv8 (based on A53)
	printf("#define EMAG8180\n");
    	printf("#define L1_CODE_SIZE 32768\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");

	}
	get_cpucount();
}


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;
}