1 files changed, 64 insertions, 0 deletions

diff --git a/src/core/hle/coprocessor.cpp b/src/core/hle/coprocessor.cpp
new file mode 100644
index 000000000..5223be7c9
--- /dev/null
+++ b/src/core/hle/coprocessor.cpp
@@ -0,0 +1,64 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.  
+
+#include "core/hle/mrc.h"
+#include "core/hle/hle.h"
+#include "core/mem_map.h"
+#include "core/core.h"
+
+namespace HLE {
+
+enum {
+    CMD_GX_REQUEST_DMA  = 0x00000000,
+};
+
+/// Data synchronization barrier
+u32 DataSynchronizationBarrier(u32* command_buffer) {
+    u32 command = command_buffer[0];
+
+    switch (command) {
+
+    case CMD_GX_REQUEST_DMA:
+        {
+            u32* src = (u32*)Memory::GetPointer(command_buffer[1]);
+            u32* dst = (u32*)Memory::GetPointer(command_buffer[2]);
+            u32 size = command_buffer[3];
+            memcpy(dst, src, size);
+        }
+        break;
+
+    default:
+        ERROR_LOG(OSHLE, "MRC::DataSynchronizationBarrier unknown command 0x%08X", command);
+        return -1;
+    }
+
+    return 0;
+}
+
+/// Returns the coprocessor (in this case, syscore) command buffer pointer
+Addr GetThreadCommandBuffer() {
+    // Called on insruction: mrc p15, 0, r0, c13, c0, 3
+    // Returns an address in OSHLE memory for the CPU to read/write to
+    RETURN(CMD_BUFFER_ADDR);
+    return CMD_BUFFER_ADDR;
+}
+
+/// Call an MRC operation in HLE
+u32 CallMRC(ARM11_MRC_OPERATION operation) {
+    switch (operation) {
+
+    case DATA_SYNCHRONIZATION_BARRIER:
+        return DataSynchronizationBarrier((u32*)Memory::GetPointer(PARAM(0)));
+
+    case CALL_GET_THREAD_COMMAND_BUFFER:
+        return GetThreadCommandBuffer();
+
+    default:
+        ERROR_LOG(OSHLE, "unimplemented MRC operation 0x%02X", operation);
+        break;
+    }
+    return -1;
+}
+
+} // namespace