USB seems to init ok

hw/bsp/raspberrypi4/family.mk

@@ -2,7 +2,7 @@ UF2_FAMILY_ID = 0x57755a57
 
 include $(TOP)/$(BOARD_PATH)/board.mk
 
-MCU_DIR = hw/mcu/broadcom/bcm2711
+MCU_DIR = hw/mcu/broadcom
 
 CC = clang
 
@@ -18,21 +18,23 @@ CFLAGS += \
 
 SRC_C += \
 	src/portable/broadcom/synopsys/dcd_synopsys.c \
-	$(MCU_DIR)/interrupts.c \
-	$(MCU_DIR)/io.c \
-	$(MCU_DIR)/mmu.c
+	$(MCU_DIR)/broadcom/interrupts.c \
+	$(MCU_DIR)/broadcom/io.c \
+	$(MCU_DIR)/broadcom/mmu.c \
+	$(MCU_DIR)/broadcom/vcmailbox.c
 
 CROSS_COMPILE = aarch64-none-elf-
 
 SKIP_NANOLIB = 1
 
-LD_FILE = $(MCU_DIR)/link.ld
+LD_FILE = $(MCU_DIR)/broadcom/link.ld
 
 INC += \
 	$(TOP)/$(BOARD_PATH) \
-	$(TOP)/$(MCU_DIR)
+	$(TOP)/$(MCU_DIR) \
+	$(TOP)/lib/CMSIS_5/CMSIS/Core_A/Include
 
-SRC_S += $(MCU_DIR)/boot.S
+SRC_S += $(MCU_DIR)/broadcom/boot.S
 
 $(BUILD)/kernel8.img: $(BUILD)/$(PROJECT).elf
 	$(OBJCOPY) -O binary $^ $@