1 files changed, 182 insertions, 0 deletions
diff --git a/src/core/hle/service/gsp_gpu.h b/src/core/hle/service/gsp_gpu.h
new file mode 100644
index 00000000..177ce8da
--- /dev/null
+++ b/src/core/hle/service/gsp_gpu.h
@@ -0,0 +1,182 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <cstddef>
+
+#include "common/bit_field.h"
+#include "core/hle/service/service.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Namespace GSP_GPU
+
+namespace GSP_GPU {
+
+/// GSP interrupt ID
+enum class InterruptId : u8 {
+    PSC0    = 0x00,
+    PSC1    = 0x01,
+    PDC0    = 0x02, // Seems called every vertical screen line
+    PDC1    = 0x03, // Seems called every frame
+    PPF     = 0x04,
+    P3D     = 0x05,
+    DMA     = 0x06,
+};
+
+/// GSP command ID
+enum class CommandId : u32 {
+    REQUEST_DMA            = 0x00,
+    SET_COMMAND_LIST_LAST  = 0x01,
+
+    // Fills a given memory range with a particular value
+    SET_MEMORY_FILL        = 0x02,
+
+    // Copies an image and optionally performs color-conversion or scaling.
+    // This is highly similar to the GameCube's EFB copy feature
+    SET_DISPLAY_TRANSFER   = 0x03,
+
+    // Conceptionally similar to SET_DISPLAY_TRANSFER and presumable uses the same hardware path
+    SET_TEXTURE_COPY       = 0x04,
+
+    SET_COMMAND_LIST_FIRST = 0x05,
+};
+
+/// GSP thread interrupt relay queue
+struct InterruptRelayQueue {
+    union {
+        u32 hex;
+
+        // Index of last interrupt in the queue
+        BitField<0,8,u32>   index;
+
+        // Number of interrupts remaining to be processed by the userland code
+        BitField<8,8,u32>   number_interrupts;
+
+        // Error code - zero on success, otherwise an error has occurred
+        BitField<16,8,u32>  error_code;
+    };
+
+    u32 unk0;
+    u32 unk1;
+
+    InterruptId slot[0x34];   ///< Interrupt ID slots
+};
+static_assert(sizeof(InterruptRelayQueue) == 0x40,
+    "InterruptRelayQueue struct has incorrect size");
+
+struct FrameBufferInfo {
+    BitField<0, 1, u32> active_fb; // 0 = first, 1 = second
+
+    u32 address_left;
+    u32 address_right;
+    u32 stride;    // maps to 0x1EF00X90 ?
+    u32 format;    // maps to 0x1EF00X70 ?
+    u32 shown_fb;  // maps to 0x1EF00X78 ?
+    u32 unknown;
+};
+static_assert(sizeof(FrameBufferInfo) == 0x1c, "Struct has incorrect size");
+
+struct FrameBufferUpdate {
+    BitField<0, 1, u8> index;    // Index used for GSP::SetBufferSwap
+    BitField<0, 1, u8> is_dirty; // true if GSP should update GPU framebuffer registers
+    u16 pad1;
+
+    FrameBufferInfo framebuffer_info[2];
+
+    u32 pad2;
+};
+static_assert(sizeof(FrameBufferUpdate) == 0x40, "Struct has incorrect size");
+// TODO: Not sure if this padding is correct.
+// Chances are the second block is stored at offset 0x24 rather than 0x20.
+#ifndef _MSC_VER
+static_assert(offsetof(FrameBufferUpdate, framebuffer_info[1]) == 0x20, "FrameBufferInfo element has incorrect alignment");
+#endif
+
+/// GSP command
+struct Command {
+    BitField<0, 8, CommandId> id;
+
+    union {
+        struct {
+            u32 source_address;
+            u32 dest_address;
+            u32 size;
+        } dma_request;
+
+        struct {
+            u32 address;
+            u32 size;
+        } set_command_list_last;
+
+        struct {
+            u32 start1;
+            u32 value1;
+            u32 end1;
+            u32 start2;
+            u32 value2;
+            u32 end2;
+        } memory_fill;
+
+        struct {
+            u32 in_buffer_address;
+            u32 out_buffer_address;
+            u32 in_buffer_size;
+            u32 out_buffer_size;
+            u32 flags;
+        } image_copy;
+
+        u8 raw_data[0x1C];
+    };
+};
+static_assert(sizeof(Command) == 0x20, "Command struct has incorrect size");
+
+/// GSP shared memory GX command buffer header
+struct CommandBuffer {
+    union {
+        u32 hex;
+
+        // Current command index. This index is updated by GSP module after loading the command
+        // data, right before the command is processed. When this index is updated by GSP module,
+        // the total commands field is decreased by one as well.
+        BitField<0,8,u32>   index;
+
+        // Total commands to process, must not be value 0 when GSP module handles commands. This
+        // must be <=15 when writing a command to shared memory. This is incremented by the
+        // application when writing a command to shared memory, after increasing this value
+        // TriggerCmdReqQueue is only used if this field is value 1.
+        BitField<8,8,u32>   number_commands;
+    };
+
+    u32 unk[7];
+
+    Command commands[0xF];
+};
+static_assert(sizeof(CommandBuffer) == 0x200, "CommandBuffer struct has incorrect size");
+
+/// Interface to "srv:" service
+class Interface : public Service::Interface {
+public:
+
+    Interface();
+
+    ~Interface();
+
+    /**
+     * Gets the string port name used by CTROS for the service
+     * @return Port name of service
+     */
+    std::string GetPortName() const override {
+        return "gsp::Gpu";
+    }
+
+};
+
+/**
+ * Signals that the specified interrupt type has occurred to userland code
+ * @param interrupt_id ID of interrupt that is being signalled
+ */
+void SignalInterrupt(InterruptId interrupt_id);
+
+} // namespace