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#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include "memtest.hpp"
/*
*
*/
template <typename T>
class Generator {
public:
Generator(void) : pattern(0) {;}
virtual T get(void) = 0;
virtual void init(T seed) {
pattern = seed;
}
protected:
T pattern;
};
/*
*
*/
template <typename T>
class GeneratorWalkingOne : public Generator<T> {
T get(void) {
T ret = this->pattern;
this->pattern <<= 1;
if (0 == this->pattern)
this->pattern = 1;
return ret;
}
};
/*
*
*/
template <typename T>
class GeneratorWalkingZero : public Generator<T> {
T get(void) {
T ret = ~this->pattern;
this->pattern <<= 1;
if (0 == this->pattern)
this->pattern = 1;
return ret;
}
};
/*
*
*/
template <typename T>
class GeneratorOwnAddress : public Generator<T> {
T get(void) {
T ret = this->pattern;
this->pattern++;
return ret;
}
};
/*
*
*/
template <typename T>
class GeneratorMovingInv : public Generator<T> {
T get(void) {
T ret = this->pattern;
this->pattern = ~this->pattern;
return ret;
}
};
/*
*
*/
template <typename T>
class GeneratorMovingInvRand : public Generator<T> {
public:
GeneratorMovingInvRand(void) : step(0), prev(0){;}
void init(T seed) {
srand(seed);
step = 0;
prev = 0;
}
T get(void) {
T ret;
T mask = -1;
if ((step & 1) == 0) {
ret = rand() & mask;
prev = ret;
}
else {
ret = ~prev & mask;
}
step++;
return ret;
}
private:
size_t step;
T prev;
};
/*
*
*/
template <typename T>
static void memtest_sequential(memtest_t *memp, Generator<T> &generator, T seed) {
const size_t steps = memp->size / sizeof(T);
size_t i;
T *mem = static_cast<T *>(memp->start);
/* fill ram */
generator.init(seed);
for (i=0; i<steps; i++)
mem[i] = generator.get();
/* read back and compare */
generator.init(seed);
for (i=0; i<steps; i++) {
if (mem[i] != generator.get()) {
memp->ecb(memp, MEMTEST_WALKING_ONE, i*sizeof(T));
return;
}
}
}
template <typename T>
static void walking_one(memtest_t *memp) {
GeneratorWalkingOne<T> generator;
memtest_sequential<T>(memp, generator, 1);
}
template <typename T>
static void walking_zero(memtest_t *memp) {
GeneratorWalkingZero<T> generator;
memtest_sequential<T>(memp, generator, 1);
}
template <typename T>
static void own_address(memtest_t *memp) {
GeneratorOwnAddress<T> generator;
memtest_sequential<T>(memp, generator, 0);
}
template <typename T>
static void moving_inversion_zero(memtest_t *memp) {
GeneratorMovingInv<T> generator;
T mask = -1;
memtest_sequential<T>(memp, generator, 0);
memtest_sequential<T>(memp, generator, 0xFFFFFFFF & mask);
}
template <typename T>
static void moving_inversion_55aa(memtest_t *memp) {
GeneratorMovingInv<T> generator;
T mask = -1;
memtest_sequential<T>(memp, generator, 0x55555555 & mask);
memtest_sequential<T>(memp, generator, 0xAAAAAAAA & mask);
}
template <typename T>
static void moving_inversion_rand(memtest_t *memp) {
GeneratorMovingInvRand<T> generator;
T mask = -1;
memtest_sequential<T>(memp, generator, memp->rand_seed & mask);
}
/*
*
*/
static void memtest_wrapper(memtest_t *memp,
void (*p_u8)(memtest_t *memp),
void (*p_u16)(memtest_t *memp),
void (*p_u32)(memtest_t *memp)) {
switch(memp->width){
case MEMTEST_WIDTH_32:
p_u8(memp);
p_u16(memp);
p_u32(memp);
break;
case MEMTEST_WIDTH_16:
p_u8(memp);
p_u16(memp);
break;
case MEMTEST_WIDTH_8:
p_u8(memp);
break;
}
}
/*
*
*/
void memtest_run(memtest_t *memp, uint32_t testmask) {
if ((testmask & MEMTEST_WALKING_ONE) == MEMTEST_WALKING_ONE) {
memtest_wrapper(memp,
walking_one<uint8_t>,
walking_one<uint16_t>,
walking_one<uint32_t>);
}
if ((testmask & MEMTEST_WALKING_ZERO) == MEMTEST_WALKING_ZERO) {
memtest_wrapper(memp,
walking_zero<uint8_t>,
walking_zero<uint16_t>,
walking_zero<uint32_t>);
}
if ((testmask & MEMTEST_OWN_ADDRESS) == MEMTEST_OWN_ADDRESS) {
memtest_wrapper(memp,
own_address<uint8_t>,
own_address<uint16_t>,
own_address<uint32_t>);
}
if ((testmask & MEMTEST_MOVING_INVERSION_ZERO) == MEMTEST_MOVING_INVERSION_ZERO) {
memtest_wrapper(memp,
moving_inversion_zero<uint8_t>,
moving_inversion_zero<uint16_t>,
moving_inversion_zero<uint32_t>);
}
if ((testmask & MEMTEST_MOVING_INVERSION_55AA) == MEMTEST_MOVING_INVERSION_55AA) {
memtest_wrapper(memp,
moving_inversion_55aa<uint8_t>,
moving_inversion_55aa<uint16_t>,
moving_inversion_55aa<uint32_t>);
}
if ((testmask & MEMTEST_MOVING_INVERSION_RAND) == MEMTEST_MOVING_INVERSION_RAND) {
memtest_wrapper(memp,
moving_inversion_rand<uint8_t>,
moving_inversion_rand<uint16_t>,
moving_inversion_rand<uint32_t>);
}
}
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