CAM::GetBufferErrorInterruptEvent

include/services/cam.hpp

@@ -1,21 +1,33 @@
 #pragma once
+#include <array>
+#include <optional>
+
 #include "helpers.hpp"
 #include "kernel_types.hpp"
 #include "logger.hpp"
 #include "memory.hpp"
 #include "result/result.hpp"
 
+// Yay, circular dependencies!
+class Kernel;
+
 class CAMService {
 	Handle handle = KernelHandles::CAM;
 	Memory& mem;
+	Kernel& kernel;
 	MAKE_LOG_FUNCTION(log, camLogger)
 
+	using Event = std::optional<Handle>;
+	static constexpr size_t portCount = 4; // PORT_NONE, PORT_CAM1, PORT_CAM2, PORT_BOTH
+	std::array<Event, portCount> bufferErrorInterruptEvents;
+
 	// Service commands
 	void driverInitialize(u32 messagePointer);
 	void getMaxLines(u32 messagePointer);
+	void getBufferErrorInterruptEvent(u32 messagePointer);
 
-public:
-	CAMService(Memory& mem) : mem(mem) {}
+  public:
+	CAMService(Memory& mem, Kernel& kernel) : mem(mem), kernel(kernel) {}
 	void reset();
 	void handleSyncRequest(u32 messagePointer);
 };

src/core/services/cam.cpp

@@ -1,19 +1,22 @@
 #include "services/cam.hpp"
 #include "ipc.hpp"
+#include "kernel.hpp"
 
 namespace CAMCommands {
 	enum : u32 {
+		GetBufferErrorInterruptEvent = 0x00060040,
 		DriverInitialize = 0x00390000,
-		GetMaxLines = 0x000A0080
+		GetMaxLines = 0x000A0080,
 	};
 }
 
-void CAMService::reset() {}
+void CAMService::reset() { bufferErrorInterruptEvents.fill(std::nullopt); }
 
 void CAMService::handleSyncRequest(u32 messagePointer) {
 	const u32 command = mem.read32(messagePointer);
 	switch (command) {
 		case CAMCommands::DriverInitialize: driverInitialize(messagePointer); break;
+		case CAMCommands::GetBufferErrorInterruptEvent: getBufferErrorInterruptEvent(messagePointer); break;
 		case CAMCommands::GetMaxLines: getMaxLines(messagePointer); break;
 		default: Helpers::panic("CAM service requested. Command: %08X\n", command);
 	}
@@ -55,4 +58,24 @@ void CAMService::getMaxLines(u32 messagePointer) {
 		mem.write32(messagePointer + 4, result);
 		mem.write16(messagePointer + 8, lines);
 	}
+}
+
+void CAMService::getBufferErrorInterruptEvent(u32 messagePointer) {
+	const u32 port = mem.read32(messagePointer + 4);
+	log("CAM::GetBufferErrorInterruptEvent (port = %d)\n", port);
+
+	mem.write32(messagePointer, IPC::responseHeader(0x6, 1, 2));
+
+	if (port >= portCount) {
+		Helpers::panic("CAM::GetBufferErrorInterruptEvent: Invalid port");
+	} else {
+		auto& event = bufferErrorInterruptEvents[port];
+		if (!event.has_value()) {
+			event = kernel.makeEvent(ResetType::OneShot);
+		}
+
+		mem.write32(messagePointer + 4, Result::Success);
+		mem.write32(messagePointer + 8, 0);
+		mem.write32(messagePointer + 12, event.value());
+	}
 }

src/core/services/service_manager.cpp

@@ -6,7 +6,7 @@
 #include "kernel.hpp"
 
 ServiceManager::ServiceManager(std::span<u32, 16> regs, Memory& mem, GPU& gpu, u32& currentPID, Kernel& kernel)
-	: regs(regs), mem(mem), kernel(kernel), ac(mem), am(mem), boss(mem), act(mem), apt(mem, kernel), cam(mem), cecd(mem, kernel), cfg(mem),
+	: regs(regs), mem(mem), kernel(kernel), ac(mem), am(mem), boss(mem), act(mem), apt(mem, kernel), cam(mem, kernel), cecd(mem, kernel), cfg(mem),
 	  dlp_srvr(mem), dsp(mem, kernel), hid(mem, kernel), http(mem), ir_user(mem, kernel), frd(mem), fs(mem, kernel),
 	  gsp_gpu(mem, gpu, kernel, currentPID), gsp_lcd(mem), ldr(mem), mic(mem), nfc(mem, kernel), nim(mem), ndm(mem), ptm(mem), soc(mem),
 	  ssl(mem), y2r(mem, kernel) {}