1 files changed, 59 insertions, 0 deletions

diff --git a/DRAM.cpp b/DRAM.cpp
new file mode 100644
index 0000000..5a0faac
--- /dev/null
+++ b/DRAM.cpp
@@ -0,0 +1,59 @@
+#include "DRAM.h"
+
+
+DRAM::DRAM() {
+    buf = new uint8_t[16*1024];
+}
+DRAM::~DRAM() {
+    delete[] buf;
+}
+void DRAM::apply(
+    CData clk,
+    CData we,
+    uint64_t claddr,
+    VlWide<4>* cldata) {
+    this->prev_clk = this->clk;
+    this->clk = clk;
+    this->we = we;
+    this->claddr = claddr;
+    this->cldata = cldata;
+}
+
+void DRAM::eval() {
+    if (!prev_clk && clk)
+        posedge_clk();
+}
+
+void DRAM::posedge_clk() {
+    // Align address on cache line address boundary
+    claddr &= ~0xF;
+
+    // Get a word based pointer to the memory
+    uint32_t *base = (uint32_t*)(buf + claddr);
+
+    if (we) {
+        printf("DRAM: write at %llx: %x%x%x%x\n",
+            claddr,
+            cldata->at(3),
+            cldata->at(2),
+            cldata->at(1),
+            cldata->at(0)
+        );
+
+        // Write the memory from the bus
+        for (int i = 0; i < 4; i++)
+            base[i] = cldata->at(i);
+    } else {
+        // Write the bus from the memory
+        for (int i = 0; i < 4; i++)
+            cldata->at(i) = base[i];
+
+        printf("DRAM: read at %llx: %x%x%x%x\n",
+            claddr,
+            cldata->at(3),
+            cldata->at(2),
+            cldata->at(1),
+            cldata->at(0)
+        );
+    }
+}
\ No newline at end of file