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	EFI_SIMPLE_POINTER_PROTOCOL* spp;
	EFI_SIMPLE_POINTER_STATE ps;
void InitMouse() {
	EFI_GUID sppg = EFI_SIMPLE_POINTER_PROTOCOL_GUID;
        EFI_HANDLE* handle_buffer;
	UINTN handle_count = 0;
        EFI_STATUS statusx = BS->LocateHandleBuffer( ByProtocol,
                                      &sppg,
                                      NULL,
                                      &handle_count,
                                      &handle_buffer );
	if ( EFI_ERROR(statusx) ) panic("UEFI broken");
        EFI_STATUS status = BS->HandleProtocol( handle_buffer[0],
                                  &sppg,
                                  (VOID **)&spp );
	if (EFI_ERROR(status)) {
		panic("Mouse required!");
	}
	EFI_STATUS xx = spp->Reset(spp, FALSE);
	if ( EFI_ERROR(xx) ) {
		panic("Failed to initialize pointy I/O");
	}
	
}
void UpdateMouse() {
	WaitForSingleEvent(spp->WaitForInput, 0);
	EFI_STATUS x = spp->GetState(spp, &ps);
	printf("%d, %d, %d\n", ps.RelativeMovementX, ps.RelativeMovementY, ps.RelativeMovementZ);
	if ( x == EFI_NOT_READY ) printf("Not ready");
	if ( x == EFI_DEVICE_ERROR ) panic("Error");
}
/*
 void panic(char *msg) -- Print error and halt
 int printf(char *format, ...) -- Standard printf implementation
*/

Code: Select all

EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath;
EFI_HANDLE Handle;

do {
//
// Find the handle that best matches the Device Path. If it is only a
// partial match the remaining part of the device path is returned in
// RemainingDevicePath.
//
RemainingDevicePath = DevicePath;
Status = gBS->LocateDevicePath (
&gEfiDevicePathProtocolGuid,
&RemainingDevicePath,
&Handle
);
if (EFI_ERROR(Status)) {
return EFI_NOT_FOUND;
}
//
// Connect all drivers that apply to Handle and RemainingDevicePath
// If no drivers are connected Handle, then return EFI_NOT_FOUND
// The Recursive flag is FALSE so only one level will be expanded.
//
Status = gBS->ConnectController (
Handle,
NULL,
RemainingDevicePath,
FALSE
);
if (EFI_ERROR(Status)) {
return EFI_NOT_FOUND;
}
// Loop until RemainingDevicePath is an empty device path
//
} while (!IsDevicePathEnd (RemainingDevicePath));
//
// A handle with DevicePath exists in the handle database
//
return EFI_SUCCESS;