diff --git a/src/southbridge/amd/agesa/hudson/Makefile.inc b/src/southbridge/amd/agesa/hudson/Makefile.inc
index 19ffae18fd..ff0662d761 100644
--- a/src/southbridge/amd/agesa/hudson/Makefile.inc
+++ b/src/southbridge/amd/agesa/hudson/Makefile.inc
@@ -14,16 +14,81 @@ romstage-y += early_setup.c
 
 ramstage-$(CONFIG_HAVE_ACPI_RESUME) += spi.c
 
-$(obj)/hudson.bin:
-	python $(src)/southbridge/amd/agesa/hudson/hudson_fwm.py $(CONFIG_HUDSON_FWM_POSITION) $@ $(CONFIG_HUDSON_XHCI_FWM_FILE) $(CONFIG_HUDSON_IMC_FWM_FILE) ""
+# ROMSIG At ROMBASE + 0x20000:
+# +-----------+---------------+----------------+------------+
+# |0x55AA55AA |EC ROM Address |GEC ROM Address |USB3 ROM    |
+# +-----------+---------------+----------------+------------+
+# EC ROM should be 64K aligned.
+HUDSON_FWM_POSITION=$(shell printf %d $(CONFIG_HUDSON_FWM_POSITION))
+
+#assume the cbfs header is less than 128 bytes.
+ROMSIG_SIZE=16
+ifeq ($(CONFIG_HUDSON_XHCI_FWM), y)
+HUDSON_XHCI_POSITION=$(shell expr $(HUDSON_FWM_POSITION) + $(ROMSIG_SIZE) + 128)
+XHCI_FWM_SIZE=$(word 5,$(shell ls -l $(CONFIG_HUDSON_XHCI_FWM_FILE)))
+else
+HUDSON_XHCI_POSITION=0
+XHCI_FWM_SIZE=0
+endif
+
+ifeq ($(CONFIG_HUDSON_GEC_FWM), y)
+HUDSON_GEC_POSITION=$(shell expr $(HUDSON_FWM_POSITION) + $(ROMSIG_SIZE) + 128 \
+		+ $(XHCI_FWM_SIZE) + 128)
+GEC_FWM_SIZE=$(word 5,$(shell ls -l $(CONFIG_HUDSON_GEC_FWM_FILE)))
+else
+HUDSON_GEC_POSITION=0
+GEC_FWM_SIZE=0
+endif
+
+ifeq ($(CONFIG_HUDSON_IMC_FWM), y)
+HUDSON_IMC_POSITION_UNALIGN=$(shell expr $(HUDSON_FWM_POSITION) + $(ROMSIG_SIZE) + 128 \
+		+ $(XHCI_FWM_SIZE) + 128 \
+		+ $(GEC_FWM_SIZE) + 128 + 65535)
+HUDSON_IMC_POSITION=$(shell expr $(HUDSON_IMC_POSITION_UNALIGN) - $(HUDSON_IMC_POSITION_UNALIGN) % 65536)
+else
+HUDSON_IMC_POSITION=0
+endif
+
+$(obj)/hudson_romsig.bin: #$(call strip_quotes, $(CONFIG_HUDSON_XHCI_FWM_FILE)) \
+			$(call strip_quotes, $(CONFIG_HUDSON_IMC_FWM_FILE)) \
+			$(call strip_quotes, $(CONFIG_HUDSON_GEC_FWM_FILE)) \
+			$(obj)/config.h
+	echo "    Hudson FW  $@"
+	for fwm in 1437226410 \
+		$(HUDSON_IMC_POSITION) \
+		$(HUDSON_GEC_POSITION) \
+		$(HUDSON_XHCI_POSITION) ; do \
+		echo  $$fwm | LC_ALL=C awk '{printf ("%c%c%c%c", $$1 % 0x100, $$1/0x100 % 0x100, $$1/0x10000 % 0x100, $$1/0x1000000);}'; \
+	done  > $@
 
 ifeq ($(CONFIG_HUDSON_FWM), y)
 cbfs-files-y += hudson/fwm
-hudson/fwm-file := $(obj)/hudson.bin
-hudson/fwm-position := $(CONFIG_HUDSON_FWM_POSITION)
+hudson/fwm-file := $(obj)/hudson_romsig.bin
+hudson/fwm-position := $(HUDSON_FWM_POSITION)
 hudson/fwm-type := raw
 endif
 
+ifeq ($(CONFIG_HUDSON_XHCI_FWM), y)
+cbfs-files-y += hudson/xhci
+hudson/xhci-file := $(call strip_quotes, $(CONFIG_HUDSON_XHCI_FWM_FILE))
+hudson/xhci-position := $(HUDSON_XHCI_POSITION)
+hudson/xhci-type := raw
+endif
+
+ifeq ($(CONFIG_HUDSON_IMC_FWM), y)
+cbfs-files-y += hudson/imc
+hudson/imc-file := $(call strip_quotes, $(CONFIG_HUDSON_IMC_FWM_FILE))
+hudson/imc-position := $(HUDSON_IMC_POSITION)
+hudson/imc-type := raw
+endif
+
+ifeq ($(CONFIG_HUDSON_GEC_FWM), y)
+cbfs-files-y += hudson/gec
+hudson/gec-file := $(call strip_quotes, $(CONFIG_HUDSON_GEC_FWM_FILE))
+hudson/gec-position := $(HUDSON_GEC_POSITION)
+hudson/gec-type := raw
+endif
+
 #ifeq ($(CONFIG_HUDSON_SATA_AHCI), y)
 ifdef CONFIG_HUDSON_AHCI_ROM
 stripped_ahci_rom_id = $(call strip_quotes,$(CONFIG_AHCI_ROM_ID))
diff --git a/src/southbridge/amd/agesa/hudson/hudson_fwm.py b/src/southbridge/amd/agesa/hudson/hudson_fwm.py
deleted file mode 100644
index ad60b3b4e4..0000000000
--- a/src/southbridge/amd/agesa/hudson/hudson_fwm.py
+++ /dev/null
@@ -1,64 +0,0 @@
-import sys, os, re
-import struct
-from Queue import Queue
-
-def main(start_addr, file_name, xhci_name, imc_name, gec_name):
-	fwm_sig		= 0x55AA55AA # Hudson-2/3/4 firmware signature
-	fwm_header_len	= 0x10       # 55AA55AA, imc_off, gec_off, xhci_off
-
-	if not os.path.exists(xhci_name):
-		print "XHCI firmware %s does not exist\n" % xhci_name
-		sys.exit(1)
-	if not os.path.exists(imc_name):
-		print "IMC firmware %s does not exist\n" % imc_name
-		sys.exit(1)
-
-	f = open(file_name, "w")
-	print "write to file " + file_name
-
-	imc_offset	= 0x10000 # 64K Bytes offset, hardcoded
-	imc_addr	= start_addr + imc_offset; #startaddr + 0x10000
-	gec_offset	= 0 #TODO
-	gec_addr	= 0 #TODO
-	xhci_addr	= start_addr + fwm_header_len #ROMSIG take 0x10 bytes
-
-	format="I" # one unsigned integer
-	data=struct.pack(format, fwm_sig)
-	f.write(data)
-	data=struct.pack(format, imc_addr)
-	f.write(data)
-	data=struct.pack(format, gec_addr)
-	f.write(data)
-	data=struct.pack(format, xhci_addr)
-	f.write(data)
-
-	fwm_content = open(xhci_name).read()
-	f.write(fwm_content)
-
-	imc_content = open(imc_name).read()
-	f.seek(0)
-	f.seek(imc_offset)
-	f.write(imc_content)
-#	if os.path.exists(gec_name):
-#		gec_conent = open(gec_name).read()
-#		f.seek(0)
-#		f.seek(gec_offset)
-#		f.write(gec_content)
-
-	f.close()
-	print "done\n"
-
-
-if __name__ == '__main__':
-	if (len(sys.argv) < 6):
-		print "\nUsage: %s <rom_addr> <rom_file> <xhci_rom> <imc_rom> <gec_rom>\n" % sys.argv[0]
-		print "Example: %s 0xFFF20000 hudson.bin xhci.bin imc.bin gec.bin\n" % sys.argv[0]
-		sys.exit(1)
-	rom_addr = int(sys.argv[1], 16)
-	rom_file = sys.argv[2]
-	xhci_file = sys.argv[3]
-	imc_file = sys.argv[4]
-	gec_file = sys.argv[5]
-	print "%x %s %s %s %s" % (rom_addr, rom_file, xhci_file, imc_file, gec_file)
-
-	main(rom_addr, rom_file, xhci_file, imc_file, gec_file)