Basic ringbuffer worker. Super hacky, not yet writing back to CPU.

src/xenia/gpu/graphics_system.cc

@@ -9,6 +9,8 @@
 
 #include <xenia/gpu/graphics_system.h>
 
+#include <xenia/gpu/ring_buffer_worker.h>
+
 
 using namespace xe;
 using namespace xe::gpu;
@@ -16,12 +18,40 @@ using namespace xe::gpu;
 
 GraphicsSystem::GraphicsSystem(const CreationParams* params) {
   memory_ = xe_memory_retain(params->memory);
+
+  worker_ = new RingBufferWorker(memory_);
 }
 
 GraphicsSystem::~GraphicsSystem() {
+  // TODO(benvanik): worker join/etc.
+  delete worker_;
+
   xe_memory_release(memory_);
 }
 
 xe_memory_ref GraphicsSystem::memory() {
   return xe_memory_retain(memory_);
 }
+
+void GraphicsSystem::InitializeRingBuffer(uint32_t ptr, uint32_t page_count) {
+  worker_->Initialize(ptr, page_count);
+}
+
+uint64_t GraphicsSystem::ReadRegister(uint32_t r) {
+  XELOGGPU("ReadRegister(%.4X)", r);
+  return 0;
+}
+
+void GraphicsSystem::WriteRegister(uint32_t r, uint64_t value) {
+  XELOGGPU("WriteRegister(%.4X, %.8X)", r, value);
+
+  switch (r) {
+    case 0x0714: // CP_RB_WPTR
+      worker_->UpdateWritePointer((uint32_t)value);
+      break;
+
+    default:
+      XELOGW("Unknown GPU register %.4X write: %.8X", r, value);
+      break;
+  }
+}