1 files changed, 118 insertions, 0 deletions
diff --git a/qtmips_gui/cacheview.cpp b/qtmips_gui/cacheview.cpp
new file mode 100644
index 0000000..8582e63
--- /dev/null
+++ b/qtmips_gui/cacheview.cpp
@@ -0,0 +1,118 @@
+#include "cacheview.h"
+
+//////////////////////
+#define ROW_HEIGHT 14
+#define VD_WIDTH 10
+#define DATA_WIDTH 72
+#define PENW 1
+//////////////////////
+
+CacheViewBlock::CacheViewBlock(const machine::Cache *cache, unsigned block) : QGraphicsObject(nullptr) {
+    this->block = block;
+    rows = cache->config().sets();
+    columns = cache->config().blocks();
+
+    QFont font;
+    font.setPointSize(7);
+
+    validity = new QGraphicsSimpleTextItem*[rows];
+    if (cache->config().write_policy() == machine::MachineConfigCache::WP_BACK)
+        dirty = new QGraphicsSimpleTextItem*[rows];
+    else
+        dirty = nullptr;
+    tag = new QGraphicsSimpleTextItem*[rows];
+    data = new QGraphicsSimpleTextItem**[rows];
+    int row_y = 1;
+    for (unsigned i = 0; i < rows; i++) {
+        int row_x = 2;
+        validity[i] = new QGraphicsSimpleTextItem("0", this);
+        validity[i]->setPos(row_x, row_y);
+        validity[i]->setFont(font);
+        row_x += VD_WIDTH;
+        if (dirty) {
+            dirty[i] = new QGraphicsSimpleTextItem(this);
+            dirty[i]->setPos(row_x, row_y);
+            dirty[i]->setFont(font);
+            row_x += VD_WIDTH;
+        }
+        tag[i] = new QGraphicsSimpleTextItem(this);
+        tag[i]->setPos(row_x, row_y);
+        tag[i]->setFont(font);
+        row_x += DATA_WIDTH;
+
+        data[i] = new QGraphicsSimpleTextItem*[columns];
+        for (unsigned y = 0; y < columns; y++) {
+            data[i][y] = new QGraphicsSimpleTextItem(this);
+            data[i][y]->setPos(row_x, row_y);
+            data[i][y]->setFont(font);
+            row_x += DATA_WIDTH;
+        }
+
+        row_y += ROW_HEIGHT;
+    }
+
+    connect(cache, SIGNAL(cache_update(uint,uint,bool,bool,std::uint32_t,const std::uint32_t*)), this, SLOT(cache_update(uint,uint,bool,bool,std::uint32_t,const std::uint32_t*)));
+}
+
+CacheViewBlock::~CacheViewBlock() {
+    delete validity;
+    delete dirty;
+    delete tag;
+    for (unsigned y = 0; y < rows; y++)
+        delete data[y];
+    delete data;
+}
+
+QRectF CacheViewBlock::boundingRect() const  {
+    return QRectF(
+        -PENW / 2,
+        -PENW / 2,
+        VD_WIDTH + (dirty ? VD_WIDTH : 0) + DATA_WIDTH*(columns+1) + PENW,
+        ROW_HEIGHT*rows + PENW
+    );
+}
+
+void CacheViewBlock::paint(QPainter *painter, const QStyleOptionGraphicsItem *option __attribute__((unused)), QWidget *widget __attribute__((unused)))  {
+    // Draw horizontal lines
+    for (unsigned i = 0; i <= rows; i++)
+        painter->drawLine(0, i * ROW_HEIGHT, VD_WIDTH + (dirty ? VD_WIDTH : 0) + DATA_WIDTH*(columns + 1), i * ROW_HEIGHT);
+    // Draw vertical lines
+    painter->drawLine(0, 0, 0, rows*ROW_HEIGHT);
+    int c_width = VD_WIDTH;
+    painter->drawLine(c_width, 0, c_width, rows*ROW_HEIGHT);
+    if (dirty) {
+        c_width += VD_WIDTH;
+        painter->drawLine(c_width, 0, c_width, rows*ROW_HEIGHT);
+    }
+    c_width += DATA_WIDTH;
+    painter->drawLine(c_width, 0, c_width, rows*ROW_HEIGHT);
+    for (unsigned i = 0; i <= columns; i++) {
+        c_width += DATA_WIDTH;
+        painter->drawLine(c_width, 0, c_width, rows*ROW_HEIGHT);
+    }
+}
+
+void CacheViewBlock::cache_update(unsigned associat, unsigned set, bool valid, bool dirty, std::uint32_t tag, const std::uint32_t *data) {
+    if (associat != block)
+        return; // Ignore blocks that are not us
+    validity[set]->setText(valid ? "1" : "0");
+    if (this->dirty)
+        this->dirty[set]->setText(valid ? (dirty ? "1" : "0") : "");
+    // TODO calculate correct size of tag
+    this->tag[set]->setText(valid ? QString("0x") + QString("%1").arg(tag, 8, 16, QChar('0')).toUpper() : "");
+    for (unsigned i = 0; i < columns; i++)
+        this->data[set][i]->setText(valid ? QString("0x") + QString("%1").arg(data[i], 8, 16, QChar('0')).toUpper() : "");
+}
+
+
+CacheViewScene::CacheViewScene(const machine::Cache *cache) {
+    associativity = cache->config().associativity();
+    block = new CacheViewBlock*[associativity];
+    int offset = 0;
+    for (unsigned i = 0; i < associativity; i++) {
+        block[i] = new CacheViewBlock(cache, i);
+        addItem(block[i]);
+        block[i]->setPos(1, offset);
+        offset += block[i]->boundingRect().height() + 3;
+    }
+}