iodev: add kayman/reg device stub

rpcsx-os/io-devices.hpp

@@ -48,3 +48,4 @@ IoDevice *createSrtcCharacterDevice();
 IoDevice *createScreenShotCharacterDevice();
 IoDevice *createLvdCtlCharacterDevice();
 IoDevice *createIccPowerCharacterDevice();
+IoDevice *createCaymanRegCharacterDevice();

rpcsx-os/iodev/cayman_reg.cpp

@@ -0,0 +1,39 @@
+#include "io-device.hpp"
+#include "orbis/KernelAllocator.hpp"
+#include "orbis/file.hpp"
+#include "orbis/thread/Thread.hpp"
+#include "orbis/utils/Logs.hpp"
+
+struct CaymanRegDevice : IoDevice {
+  orbis::ErrorCode open(orbis::Ref<orbis::File> *file, const char *path,
+                        std::uint32_t flags, std::uint32_t mode,
+                        orbis::Thread *thread) override;
+};
+
+static orbis::ErrorCode cayman_reg_ioctl(orbis::File *file,
+                                        std::uint64_t request, void *argp,
+                                        orbis::Thread *thread) {
+  ORBIS_LOG_FATAL("Unhandled cayman_reg ioctl", request);
+  thread->where();
+  return {};
+}
+
+static const orbis::FileOps fileOps = {
+    .ioctl = cayman_reg_ioctl,
+};
+
+orbis::ErrorCode CaymanRegDevice::open(orbis::Ref<orbis::File> *file,
+                                      const char *path, std::uint32_t flags,
+                                      std::uint32_t mode,
+                                      orbis::Thread *thread) {
+  auto newFile = orbis::knew<orbis::File>();
+  newFile->ops = &fileOps;
+  newFile->device = this;
+
+  *file = newFile;
+  return {};
+}
+
+IoDevice *createCaymanRegCharacterDevice() {
+  return orbis::knew<CaymanRegDevice>();
+}

rpcsx-os/main.cpp

@@ -474,6 +474,7 @@ static void ps4InitDev() {
   rx::vfs::addDevice("lvdctl", createLvdCtlCharacterDevice());
   rx::vfs::addDevice("lvd0", createHddCharacterDevice(0x100000000));
   rx::vfs::addDevice("icc_power", createIccPowerCharacterDevice());
+  rx::vfs::addDevice("cayman/reg", createCaymanRegCharacterDevice());
 
   // mbus->emitEvent({
   //     .system = 2,