1 files changed, 87 insertions, 0 deletions
diff --git a/tests/cache_2_1.cc b/tests/cache_2_1.cc
new file mode 100644
index 0000000..cb48d2a
--- /dev/null
+++ b/tests/cache_2_1.cc
@@ -0,0 +1,87 @@
+#include "c11.h"
+#include "cache.h"
+#include "dram.h"
+#include "storage.h"
+#include <catch2/catch_test_macros.hpp>
+#include <iostream>
+
+/**
+ * One way associative, two level
+ * Assuming that each address is 14 bits (16384 word address space):
+ * LEVEL1: OFFSET=2, INDEX=5(32), TAG=7
+ * LEVEL2: OFFSET=2, INDEX=7(128), TAG=5
+ */
+class C21 : public C11
+{
+  public:
+	C21() : C11()
+	{
+		this->c2 = new Cache(new Dram(this->m_delay), 7, 0, this->c_delay);
+		this->c = new Cache(this->c2, 5, 0, this->c_delay);
+	}
+
+	Cache *c2;
+};
+
+// TEST_CASE_METHOD(C21, "store 32th, 33rd element in DELAY cycles",
+
+TEST_CASE_METHOD(C21, "store 32th, 96th element in DELAY cycles, evict to level 2", "[2level_cache]")
+{
+	int r;
+	signed int w;
+	CHECK(expected == actual);
+
+	w = 0x11223344;
+	// delay + 1 due to internal logic, when mem
+	// finishes handle_miss still returns 'blocked'
+	this->wait_then_do(this->m_delay + (this->c_delay * 2) + 2, [this, w]() {
+		return this->c->write_word(this->mem, w, 0b10000000);
+	});
+
+	r = this->c->write_word(this->mem, w, 0b10000000);
+	CHECK(r);
+
+	// check level 2
+	// note this is write-back == no write
+	actual = this->c2->view(32, 1)[0];
+	REQUIRE(expected == actual);
+
+	// check level 1
+	expected.at(0) = w;
+	actual = this->c->view(0, 1)[0];
+	REQUIRE(expected == actual);
+
+	// wait = evict
+	this->wait_then_do(this->c_delay + 1, [this, w]() {
+		return this->c->write_word(this->mem, w, 0b110000000);
+	});
+
+	// check level 2
+	actual = this->c2->view(32, 1)[0];
+	REQUIRE(expected == actual);
+
+	// read in line
+	this->wait_then_do(this->m_delay + this->c_delay + 1, [this, w]() {
+		return this->c->write_word(this->mem, w, 0b110000000);
+	});
+
+	expected.at(0) = 0;
+	// perform write
+	this->wait_then_do(this->c_delay + 1, [this, w]() {
+		return this->c->write_word(this->mem, w, 0b110000000);
+	});
+
+	r = this->c->write_word(this->mem, w, 0b110000000);
+	CHECK(r);
+
+	// check level 2
+	actual = this->c2->view(96, 1)[0];
+	REQUIRE(expected == actual);
+	expected.at(0) = w;
+	actual = this->c2->view(32, 1)[0];
+	REQUIRE(expected == actual);
+
+	// check level 1
+	actual = this->c->view(0, 1)[0];
+	REQUIRE(expected == actual);
+}