CPU test flow

在CPU 的 test_flow中,大概分成底下部份 1. AC/DC Test 確保沒有短路或者漏電的問題造成Power Supply不穩... 2. Function Test 用Function Vector(PLL test, TX/RX...)來測試 3. Cache test 用BIST測, 如果有row/column fail, 可用 Cache repair的機制來修補. 4. bin class. 分出CPU的等級 所以不管是那種Test, 都要打vector到TX, 接收RX的 Data來判斷 Fail/OK. 底下就寫了個簡單的 Test-Vector Generator. step1. 打Config Cycle, 確定 Mode selection. step2. 打Vector到TX, 抓RX的訊號. PS: 這只是Emulator, 離實際 Platform上的實現還有一段距離. 底下是 Physical Platform 下要考慮的因素 1. sample ratio 2. package size (Byte/Bit...) 3. latency ... 可以參考print port control UART/RS232

#include < stdio.h>
#include < stdlib.h>
#include < util.h>

#ifdef DEBUG
int  VIA_DEBUG =1;
#else
int VIA_DEBUG =0;
#endif
//==================================
//Hash Definition
//==================================
enum TSTLIST {
 TST_VECTOR_1 =0,
 TST_VECTOR_2 =1,
 TST_VECTOR_3 =2,
};


enum ERRORLIST {
 OUT_POWER =0,
 OUT_FREQ =1,
 OUT_THEM =2, 
 OUT_BOOL =3,
};

//==================================
//THEM[31:20], FREQ[19:8], POWER[7:0]
//==================================
enum CONFIGREG {
 POWER_TAG =8,
 FREQ_TAG =12,
 THEM_TAG =12,
};

//===================================
// Range Definition
//===================================
#define MAX_POWER 5 
#define MIN_POWER 1
#define MAX_FREQ 1000
#define MIN_FREQ 20
#define MAX_THEM 50
#define MIN_THEM 2


struct Supply {
 char* Name_Supply;  //Name  Test_Vector Name;
 int Power_Supply;  //Power  Supply unit in voltage(.v)
 int Freq_Supply;  //Frequency Supply unit in Mhz
 int Them_Supply;  //Thermal  Supply unit in .c
} SPLY_TSTLIST[] = {
 {"TST_VECTOR_1", 2, 500, 30 },
 {"TST_VECTOR_2", 3, 500, 30 },
 {"TST_VECTOR_3", 3, 400, 28 },
};

//===================================
// TEST Vector Support
//===================================

struct Vector {
 char*  Name_Vector;
 char* v; 
} VECT_TSTLIST[] = {
 {"TST_VECTOR_1", "0101 0100 0010 0110 0101 0100 0010 0110" },
 {"TST_VECTOR_2", "0101 0111 0010 0010 0101 0111 0010 0010" },
 {"TST_VECTOR_2", "0101 0110 1010 0110 0101 0110 1010 0110" },
};

#define ON "1" 
#define OFF "0"
#define HZ "Z"
#define HX "X"
//===================================
//TESTER Definition
//===================================
struct TESTER {
 char*  Name_TESTER;
 char* CLK;
 char* RST;
 char* VAL;
 char* TX;
 char* RX;

} OUR_TESTER = { "VIA_TST", OFF, OFF, OFF, OFF, OFF }; 

//===================================
//
//===================================
struct Detect {
 char*  Name_Detect;
 int Power_Detect;
 
};


int ERROR_HANDLE(int a, int i){
 switch(a){
   case 0 : printf("Please Check Power_Supply at V-%d\n", i); return -1; break;
   case 1 : printf("Please Check Freq_Supply  at V-%d\n", i); return -1; break;
   case 2 : printf("Please Check Them_Supply  at V-%d\n", i); return -1; break;
   case 3 : printf("Please Check Test Vector  at V-%d\n", i); return -1; break;
  default : return 0; break; 
 }
return 0;
}



int SETREG(int p, int f, int t ){

     if( p < MIN_POWER || p > MAX_POWER) { return OUT_POWER; }
     if( f < MIN_FREQ  || f > MAX_FREQ ) { return OUT_FREQ;  }
     if( t < MIN_THEM  || t > MAX_THEM ) { return OUT_THEM;  }
      
     return  t << (POWER_TAG + FREQ_TAG) + f << (FREQ_TAG) + p;
  }


void Set2TESTER(char* c, char* r, char* v,char* t){
OUR_TESTER.CLK = c;
OUR_TESTER.RST = r;
OUR_TESTER.TX  = t;
OUR_TESTER.VAL = v;
}

char* Put2TESTER() {
char* c = OUR_TESTER.CLK;
char* s = OUR_TESTER.RST;
char* v = OUR_TESTER.VAL;
char* t = OUR_TESTER.TX;

OUR_TESTER.RX = "1";

char* r = OUR_TESTER.RX;
printf ("CLK:%2s, RST:%2s,VAL: %2s, TX:%2s, RX:%2s\n",c,s,v,t,r);
return r;
}


void Set2TSTVector(int a,int i){
char* v = VECT_TSTLIST[i].v;

 Set2TESTER(ON, OFF, OFF, OFF);
 Put2TESTER();

while( (*v++)!='\0'){
       ((*v)==' ')?  : 
 ((*v)=='0')? Set2TESTER(OFF, OFF, ON, OFF) : Set2TESTER(OFF, OFF, ON, ON);
 Put2TESTER();

 ((*v)==' ')?  : 
 ((*v)=='0')? Set2TESTER(ON, OFF, ON, OFF) : Set2TESTER(ON, OFF, ON, ON);
 Put2TESTER();

 }
 Set2TESTER(OFF, OFF, OFF, OFF);
 Put2TESTER();

}

void Set2Config(int a,int i){
    char* t = int2bin(a);

    if(VIA_DEBUG) printf("Config Vector (%d) :: %s\n",i,t);

 Set2TESTER(ON, OFF, OFF, OFF);
 Put2TESTER();

while( (*t++)!= '\0'){
 ((*t)=='0')? Set2TESTER(OFF, OFF, ON, OFF) : Set2TESTER(OFF, OFF, ON, ON);
 Put2TESTER();
    
 ((*t)=='0')? Set2TESTER(ON, OFF, ON, OFF) : Set2TESTER(ON, OFF, ON, ON);
  Put2TESTER();
    }


 Set2TESTER(OFF, OFF, OFF, OFF);
 Put2TESTER();
}

void Set2Ini(int a,int i){
int j;
 
 Set2TESTER(OFF, ON, OFF, OFF);
 Put2TESTER();
 
   for( j=0; j<=3; j++){
 Set2TESTER(ON, ON, OFF, OFF);
 Put2TESTER();

 (j==3)? Set2TESTER(OFF, OFF, OFF, OFF) : Set2TESTER(OFF, ON, OFF, OFF);

 Put2TESTER();
   }
}

int main() {
int i,a;


for(i=0; i<sizeof(SPLY_TSTLIST)/sizeof(SPLY_TSTLIST[0]); i++){
//Step.1 initial 
Set2Ini(a,i);

//Step.2 Set Config REG
a = SETREG(SPLY_TSTLIST[i].Power_Supply, SPLY_TSTLIST[i].Freq_Supply, SPLY_TSTLIST[i].Them_Supply);
if (ERROR_HANDLE(a,i)== -1) return -1;

Set2Config(a,i);

//Step.3 Set Test Vector
Set2TSTVector(a,i);


//printf("%d\n",a);
}

return 0;
}