105 lines
2.2 KiB
C++
105 lines
2.2 KiB
C++
#include <limits>
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#include <cstdlib>
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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_sim.h"
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#include "../testbench.hpp"
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std::array<uint32_t, WORD_AMNT> ram_refresh_data;
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TB<Vbram_interface_sim> *tb;
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static void handle_read_aa(size_t &i) {
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if (tb->mod.word_ok) {
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uint32_t val = sign_extend(tb->mod.word, 20);
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tb->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 (!tb->mod.word_next) {
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tb->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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tb->mod.word_next = 1;
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tb->run_clock();
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while (!tb->mod.word_last || (tb->mod.word_last && tb->mod.word_next)) {
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handle_read_aa(ind);
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tb->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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tb->mod.word_next = 1;
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tb->run_clock();
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ind = 0;
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while (!tb->mod.word_last || (tb->mod.word_last && tb->mod.word_next)) {
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handle_read_aa(ind);
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tb->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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static void test_aa_read_interrupted() {
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size_t ind = 0;
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tb->mod.word_next = 1;
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tb->run_clock();
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for (int i = 0; i < 100; i++) {
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handle_read_aa(ind);
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tb->run_clock();
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my_assert(!tb->mod.word_last, "too many reads");
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}
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tb->mod.word_rst = 1;
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tb->run_clock();
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tb->mod.word_rst = 0;
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tb->run_clock();
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test_aa_read_1();
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}
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static void refresh_data() {
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for (size_t i = 0; i < WORD_AMNT; i++) {
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uint32_t val = mask_extend(rand(), 20);
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ram_refresh_data[i] = val;
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tb->mod.backing_store[i*2] = val & 0xFFFF;
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tb->mod.backing_store[i*2+1] = val >> 16;
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}
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tb->mod.refresh_start = 1;
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tb->mod.start_addr = 0x12340;
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tb->run_clock();
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while (!tb->mod.refresh_finished)
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tb->run_clock();
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tb->mod.refresh_start = 0;
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tb->run_clock();
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}
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int main(int argc, char *argv[]) {
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Verilated::commandArgs(argc, argv);
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Verilated::traceEverOn(true);
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Verilated::fatalOnError(false);
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tb = new TB<Vbram_interface_sim>(argc, argv);
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printf("test basic read/write\n");
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refresh_data();
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test_aa_read_1();
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refresh_data();
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test_aa_read_1();
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printf("test resetting\n");
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test_aa_read_interrupted();
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printf("ok\n");
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return 0;
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}
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