vexriscv_mem_mapped_aes128/c_project/src/main.c

#include <stdbool.h>
#include "hal.h"

#define LENGTH 4

typedef struct {
    volatile uint32_t key[LENGTH];
    volatile uint32_t state_in[LENGTH];
    volatile uint32_t useEncDec;
    volatile uint32_t valid_in;
    volatile uint32_t valid_out;
    volatile uint32_t state_out[LENGTH];
} Aes_Mem;

#define AES_MEM ((Aes_Mem*)(0xF0030000))

void writeKey(uint32_t * key) {
    for (unsigned i = 0; i < LENGTH; i++) {
        AES_MEM->key[i] = key[i];
    }
}

void writeState(uint32_t * state) {
    for (unsigned i = 0; i < LENGTH; i++) {
        AES_MEM->state_in[i] = state[i];
    }
}

void setEncDec(int encDec) {
    AES_MEM->useEncDec = encDec;
}

void setValidIn() {
    AES_MEM->valid_in = 1;
}

void readState(uint32_t * state) {
    for (unsigned i = 0; i < LENGTH; i++) {
        state[i] = AES_MEM->state_out[i];
    }
}

void printState(uint32_t * state) {
    printf("State:\n");
    for(unsigned i = 0; i < LENGTH; i++) {
        printf("%08x",state[LENGTH-i-1]);
    }
    printf("\n");
}

void printKey(uint32_t * key) {
    printf("Key:\n");
    for(unsigned i = 0; i < LENGTH; i++) {
        printf("%08x",key[LENGTH-i-1]);
    }
    printf("\n");
}

int main(void) {
    printf("HELLO WORLD\n");

    // uint32_t state[LENGTH] = {0x6bc1bee2, 0x2e409f96, 0xe93d7e11, 0x7393172a};
    // uint32_t key[LENGTH] = {0x2b7e1516, 0x28aed2a6, 0xabf71588, 0x09cf4f3c};

    uint32_t state[LENGTH] = {0x7393172a, 0xe93d7e11, 0x2e409f96, 0x6bc1bee2};
    uint32_t key[LENGTH] = {0x09cf4f3c, 0xabf71588, 0x28aed2a6, 0x2b7e1516};

    writeKey(key);

    while (1) {
        printState(state);
        printKey(key);

        writeState(state);

        setEncDec(1);

        setValidIn();
        while (AES_MEM->valid_out != 1);

        readState(state);
        printState(state);

        writeState(state);

        setEncDec(0);

        setValidIn();
        while (AES_MEM->valid_out != 1);

        readState(state);
        printState(state);


    }
    return 0;
}