113 lines
2.5 KiB
C++
113 lines
2.5 KiB
C++
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#include <memory>
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#include <cassert>
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#include <limits>
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#include <cstdint>
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#include <cstring>
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#include <cstdlib>
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#include <iostream>
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#include <random>
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#include <unistd.h>
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#include <verilated.h>
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#include "Vbram_interface.h"
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using ModType = Vbram_interface;
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using V = uint32_t;
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ModType *mod;
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constexpr uint32_t start_addr = 0x12340;
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// #define BAILOUT_NUMBER 100000
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#include "../boilerplate.cpp"
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std::array<uint32_t, WORD_AMNT> ram_refresh_data;
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static void handle_ram() {
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static int timer = 0;
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constexpr auto TIMER_MAX = 10;
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bool flip_flop = false;
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if (mod->ram_read) {
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timer++;
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if (timer == TIMER_MAX) {
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mod->ram_valid = 1;
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if (mod->ram_dma_addr < start_addr ||
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mod->ram_dma_addr >= start_addr + WORD_AMNT*4) {
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printf("bad address %x\n", mod->ram_dma_addr);
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exit(1);
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}
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my_assert(mod->ram_dma_addr >= start_addr, "left oob access %x", mod->ram_dma_addr);
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my_assert(mod->ram_dma_addr < start_addr + WORD_AMNT*4, "right oob access %x", mod->ram_dma_addr);
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my_assert(mod->ram_dma_addr % 2 == 0, "unaligned access %x", mod->ram_dma_addr);
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if (mod->ram_dma_addr % 4 == 0) {
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mod->ram_word = ram_refresh_data[(mod->ram_dma_addr - start_addr)/4]& 0xFFFF;
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} else {
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mod->ram_word = ram_refresh_data[(mod->ram_dma_addr - start_addr)/4] >> 16;
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}
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}
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} else {
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mod->ram_valid = 0;
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timer = 0;
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}
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}
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static void handle_read_aa(size_t &i) {
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if (mod->word_ok) {
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uint32_t val = sign_extend(mod->word, 20);
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mod->word_next = 0;
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my_assert(val == ram_refresh_data[i], "received value %x (%zu) != %x", i, val, ram_refresh_data[i]);
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i++;
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} else if (!mod->word_next) {
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mod->word_next = 1;
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}
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}
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/* Test reading the entire array twice. */
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static void test_aa_read_1() {
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size_t ind = 0;
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mod->word_next = 1;
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run_clock();
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while (!mod->word_last || (mod->word_last && mod->word_next)) {
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handle_read_aa(ind);
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run_clock();
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}
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my_assert(ind == WORD_AMNT, "read value %zu != %d\n", ind, WORD_AMNT);
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mod->word_next = 1;
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run_clock();
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ind = 0;
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while (!mod->word_last || (mod->word_last && mod->word_next)) {
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handle_read_aa(ind);
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run_clock();
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}
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my_assert(ind == WORD_AMNT, "second read value %zu != %d\n", ind, WORD_AMNT);
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}
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int main(int argc, char **argv) {
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init(argc, argv);
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for (size_t i = 0; i < RAM_WID; i++) {
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ram_refresh_data[i] = mask_extend(rand(), 20);
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}
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mod->refresh_start = 1;
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mod->start_addr = start_addr;
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run_clock();
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while (!mod->refresh_finished) {
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handle_ram();
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run_clock();
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}
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mod->refresh_start = 0;
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run_clock();
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test_aa_read_1();
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printf("ok\n");
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return 0;
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}
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