1 files changed, 53 insertions, 0 deletions
diff --git a/sys/dev/vt/hw/efifb/efifb.c b/sys/dev/vt/hw/efifb/efifb.c
index 05b2d79..7695547 100644
--- a/sys/dev/vt/hw/efifb/efifb.c
+++ b/sys/dev/vt/hw/efifb/efifb.c
@@ -37,6 +37,9 @@ __FBSDID("$FreeBSD$");
 #include <sys/kernel.h>
 #include <sys/fbio.h>
 #include <sys/linker.h>
+#include <sys/bus.h>
+#include <sys/module.h>
+#include <sys/rman.h>
 
 #include "opt_platform.h"
 
@@ -179,3 +182,53 @@ vt_efifb_remap(void *xinfo)
 	    info->fb_size, VM_MEMATTR_WRITE_COMBINING);
 }
 
+/* Dummy NewBus functions to reserve the resources used by the efifb driver */
+static void
+vtefifb_identify(driver_t *driver, device_t parent)
+{
+
+	if (local_info.fb_pbase == 0 || local_info.fb_size == 0)
+		return;
+
+	if (BUS_ADD_CHILD(parent, 0, driver->name, 0) == NULL)
+		panic("Unable to attach vt_efifb console");
+}
+
+static int
+vtefifb_probe(device_t dev)
+{
+
+	device_set_desc(dev, "vt_efifb driver");
+	return (BUS_PROBE_NOWILDCARD);
+}
+
+static int
+vtefifb_attach(device_t dev)
+{
+	struct resource *pseudo_phys_res;
+	int res_id;
+
+	res_id = 0;
+	pseudo_phys_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
+	    &res_id, local_info.fb_pbase,
+	    local_info.fb_pbase + local_info.fb_size,
+	    local_info.fb_size, RF_ACTIVE);
+	if (pseudo_phys_res == NULL)
+		panic("Unable to reserve vt_efifb memory");
+	return (0);
+}
+
+/*-------------------- Private Device Attachment Data  -----------------------*/
+static device_method_t vtefifb_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_identify,	vtefifb_identify),
+	DEVMETHOD(device_probe,         vtefifb_probe),
+	DEVMETHOD(device_attach,        vtefifb_attach),
+
+	DEVMETHOD_END
+};
+
+DEFINE_CLASS_0(vtefifb, vtefifb_driver, vtefifb_methods, 0);
+devclass_t vtefifb_devclass;
+
+DRIVER_MODULE(vtefifb, nexus, vtefifb_driver, vtefifb_devclass, NULL, NULL);