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/* Cache test */

#include "support.h"

#include "spr_defs.h"

/* Number of IC sets (power of 2) */

#define IC_SETS 512

#define DC_SETS 512

/* Block size in bytes (1, 2, 4, 8, 16, 32 etc.) */

#define IC_BLOCK_SIZE 16

#define DC_BLOCK_SIZE 16

/* Number of IC ways (1, 2, 3 etc.). */

#define IC_WAYS 1

#define DC_WAYS 1

/* Cache size */

#define IC_SIZE (IC_WAYS*IC_SETS*IC_BLOCK_SIZE)

#define DC_SIZE (DC_WAYS*DC_SETS*DC_BLOCK_SIZE)

/* Memory access macros */

#define REG8(add) *((volatile unsigned char *)(add))

#define REG16(add) *((volatile unsigned short *)(add))

#define REG32(add) *((volatile unsigned long *)(add))

extern void (*jalr)(void);

extern void (*jr)(void);

void dummy();

void jump_and_link(void)

{

        asm("_jalr:");

}

void jump(void)

{

        asm("_jr:");

        /* Read and increment index */

        asm("l.lwz\t\tr3,0(r0)");

        asm("l.addi\t\tr3,r3,4");

        asm("l.sw\t\t0(r0),r3");

        /* Load next executin address from table */

        asm("l.lwz\t\tr3,0(r3)");

        /* Jump to that address */

        asm("l.jr\t\tr3") ;

        /* Report that we succeeded */

        asm("l.mtspr\t\tr0,r3,0x1234");

}

void copy_jr(unsigned long add)

{

        memcpy((void *)add, (void *)&jr, 24);

}

void call(unsigned long add)

{

        asm("l.jr\t\t%0" : : "r" (add) : "r11");

        asm("l.nop" : :);

}

void icache_enable(void)

{

        unsigned long add;

        /* First invalidate the cache. As at this point cache is disabled,

           the cache acts as it contains image of lowest memory block */

        for(add = 1; add <= IC_SIZE; add += IC_BLOCK_SIZE)

                mtspr(SPR_ICBIR, add);

        mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_ICE);

}

void dcache_enable(void)

{

        unsigned long add;

        /* First invalidate the cache. As at this point cache is disabled,

           the cache acts as it contains image of lowest memory block */

        for(add = 1; add <= DC_SIZE; add += DC_BLOCK_SIZE)

                mtspr(SPR_DCBIR, add);

        mtspr(SPR_SR, mfspr(SPR_SR) | SPR_SR_DCE);

}

void icache_disable(void)

{

        /* This is write trough cache so we dont have to flush it */

        mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_ICE);

}

void dcache_disable(void)

{

        /* This is write trough cache so we dont have to flush it */

        mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_DCE);

}

int dc_test(void)

{

        int i;

        unsigned long base, add, ul;

        base = (((unsigned long)&dummy / (IC_SETS*IC_BLOCK_SIZE)) * IC_SETS*IC_BLOCK_SIZE) + IC_SETS*IC_BLOCK_SIZE;

        dcache_enable();

        /* Cache miss r */

        add = base;

        for(i = 0; i < DC_WAYS; i++) {

                ul = REG32(add);

                ul = REG32(add + DC_BLOCK_SIZE);

                ul = REG32(add + 2*DC_BLOCK_SIZE);

                ul = REG32(add + 3*DC_BLOCK_SIZE);

                add += DC_SETS*DC_BLOCK_SIZE;

        }

        /* Cache hit w */

        add = base;

        for(i = 0; i < DC_WAYS; i++) {

                REG32(add + 0) = 0x00000001;

                REG32(add + DC_BLOCK_SIZE + 4) = 0x00000002;

                REG32(add + 2*DC_BLOCK_SIZE + 8) = 0x00000003;

                REG32(add + 3*DC_BLOCK_SIZE + 12) = 0x00000004;

                add += DC_SETS*DC_BLOCK_SIZE;

        }

        /* Cache hit r/w */

        add = base;

        for(i = 0; i < DC_WAYS; i++) {

                REG8(add + DC_BLOCK_SIZE - 4) = REG8(add + 3);

                REG8(add + 2*DC_BLOCK_SIZE - 8) = REG8(add + DC_BLOCK_SIZE + 7);

                REG8(add + 3*DC_BLOCK_SIZE - 12) = REG8(add + 2*DC_BLOCK_SIZE + 11);

                REG8(add + 4*DC_BLOCK_SIZE - 16) = REG8(add + 3*DC_BLOCK_SIZE + 15);

                add += DC_SETS*DC_BLOCK_SIZE;

        }

        /* Cache hit/miss r/w */

        add = base;

        for(i = 0; i < DC_WAYS; i++) {

                REG16(add + (IC_SETS - 1)*IC_BLOCK_SIZE) = REG16(add + DC_BLOCK_SIZE - 4) + REG16(add + 2);

                REG16(add + (IC_SETS - 1)*IC_BLOCK_SIZE + 2) = REG16(add + DC_BLOCK_SIZE - 8) + REG16(add + DC_BLOCK_SIZE + 6);

                REG16(add + (IC_SETS - 1)*IC_BLOCK_SIZE + 4) = REG16(add + DC_BLOCK_SIZE - 12) + REG16(add + 2*DC_BLOCK_SIZE + 10);

                REG16(add + (IC_SETS - 1)*IC_BLOCK_SIZE + 6) = REG16(add+ DC_BLOCK_SIZE - 16) + REG16(add + 2*DC_BLOCK_SIZE + 14);

                add += DC_SETS*DC_BLOCK_SIZE;

        }

        /* Fill cache with unused data */

        add = base + DC_WAYS*DC_SETS*DC_BLOCK_SIZE;

        for(i = 0; i < DC_WAYS; i++) {

                ul = REG32(add);

                ul = REG32(add + DC_BLOCK_SIZE);

                ul = REG32(add + 2*DC_BLOCK_SIZE);

                ul = REG32(add + 3*DC_BLOCK_SIZE);

                add += DC_SETS*DC_BLOCK_SIZE;

        }

        /* Cache hit/miss r */

        ul = 0;

        add = base;

        for(i = 0; i < DC_WAYS; i++) {

                ul +=   REG16(add + (IC_SETS - 1)*IC_BLOCK_SIZE) +

                        REG16(add + DC_BLOCK_SIZE - 4) +

                        REG16(add + 2);

                ul +=   REG16(add + (IC_SETS - 1)*IC_BLOCK_SIZE + 2) +

                        REG16(add + DC_BLOCK_SIZE - 8) +

                        REG16(add + DC_BLOCK_SIZE + 6);

                ul +=   REG16(add + (IC_SETS - 1)*IC_BLOCK_SIZE + 4) +

                        REG16(add + DC_BLOCK_SIZE - 12) +

                        REG16(add + 2*DC_BLOCK_SIZE + 10);

                ul +=   REG16(add + (IC_SETS - 1)*IC_BLOCK_SIZE + 6) +

                        REG16(add+ DC_BLOCK_SIZE - 16) +

                        REG16(add + 2*DC_BLOCK_SIZE + 14);

                add += DC_SETS*DC_BLOCK_SIZE;

        }

        dcache_disable();

        return ul;

}

int ic_test(void)

{

        int i;

        unsigned long base, add;

        base = (((unsigned long)&dummy / (IC_SETS*IC_BLOCK_SIZE)) * IC_SETS*IC_BLOCK_SIZE) + IC_SETS*IC_BLOCK_SIZE;

        icache_enable();

        /* Copy jr to various location */

        add = base;

        for(i = 0; i < IC_WAYS; i++) {

                copy_jr(add);

                copy_jr(add + 2*IC_BLOCK_SIZE + 4);

                copy_jr(add + 4*IC_BLOCK_SIZE + 8);

                copy_jr(add + 6*IC_BLOCK_SIZE + 12);

                copy_jr(add + (IC_SETS - 2)*IC_BLOCK_SIZE + 0);

                copy_jr(add + (IC_SETS - 4)*IC_BLOCK_SIZE + 4);

                copy_jr(add + (IC_SETS - 6)*IC_BLOCK_SIZE + 8);

                copy_jr(add + (IC_SETS - 8)*IC_BLOCK_SIZE + 12);

                add += IC_SETS*IC_BLOCK_SIZE;

        }

        /* Load execution table which starts at address 4 (at address 0 is table index) */

        add = base;

        for(i = 0; i < IC_WAYS; i++) {

                /* Cache miss */

                REG32(0x3c*i + 0x04) = add + 2*IC_BLOCK_SIZE + 4;

                REG32(0x3c*i + 0x08) = add + 4*IC_BLOCK_SIZE + 8;

                REG32(0x3c*i + 0x0c) = add + 6*IC_BLOCK_SIZE + 12;

                /* Cache hit/miss */

                REG32(0x3c*i + 0x10) = add;

                REG32(0x3c*i + 0x14) = add + (IC_SETS - 2)*IC_BLOCK_SIZE + 0;

                REG32(0x3c*i + 0x18) = add + 2*IC_BLOCK_SIZE + 4;

                REG32(0x3c*i + 0x1c) = add + (IC_SETS - 4)*IC_BLOCK_SIZE + 4;

                REG32(0x3c*i + 0x20) = add + 4*IC_BLOCK_SIZE + 8;

                REG32(0x3c*i + 0x24) = add + (IC_SETS - 6)*IC_BLOCK_SIZE + 8;

                REG32(0x3c*i + 0x28) = add + 6*IC_BLOCK_SIZE + 12;

                REG32(0x3c*i + 0x2c) = add + (IC_SETS - 8)*IC_BLOCK_SIZE + 12;

                /* Cache hit */

                REG32(0x3c*i + 0x30) = add + (IC_SETS - 2)*IC_BLOCK_SIZE + 0;

                REG32(0x3c*i + 0x34) = add + (IC_SETS - 4)*IC_BLOCK_SIZE + 4;

                REG32(0x3c*i + 0x38) = add + (IC_SETS - 6)*IC_BLOCK_SIZE + 8;

                REG32(0x3c*i + 0x3c) = add + (IC_SETS - 8)*IC_BLOCK_SIZE + 12;

                add += IC_SETS*IC_BLOCK_SIZE;

        }

        /* Go home */

        REG32(0x3c*i + 4) = (unsigned long)&jalr;

        /* Initilalize table index */

        REG32(0) = 0;

        /* Go */

        call(base);

        icache_disable();

        return 0xdeaddead;

}

int main(void)

{

        int rc;

        rc = dc_test();

        report(rc + 0xdeaddca1);

        /* Be aware that this test doesn't report result troug report call.

           It writes to spr 0x1234 directly (in jump function)!!!

           This test can not be run on or1ksim. */

        rc = ic_test();

        report(rc);

        exit(0);

}

/* just for size calculation */

void dummy()

{

}