[x86] merge the RDC R-321x target as a subtarget of x86

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33779 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/x86/image/mkimg_bifferboard.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+
+"""
+   Create firmware for 4/8MB Bifferboards, suitable for uploading using
+   either bb_upload8.py or bb_eth_upload8.py
+"""
+
+import struct, sys
+
+# Increase the kmax value if the script gives errors about the kernel being 
+# too large.  You need to set the Biffboot kmax value to the same value you
+# use here.
+kmax = 0x10
+
+# No need to change this for 4MB devices, it's only used to tell you if 
+# the firmware is too large!
+flash_size = 0x800000
+
+# This is always the same, for 1MB, 4MB and 8MB devices
+config_extent = 0x6000
+
+kernel_extent = kmax * 0x10000
+
+if __name__ == "__main__":
+
+  if len(sys.argv) != 4:
+    print  "usage: mkimg_bifferboard.py <kernel> <rootfs> <output file>"
+    sys.exit(-1)
+    
+  bzimage = sys.argv[1]
+  rootfs = sys.argv[2]
+  target = sys.argv[3]
+
+  # Kernel first
+  fw = file(bzimage).read()
+  if len(fw) > (kernel_extent - config_extent):
+    raise IOError("Kernel too large")
+
+  # Pad up to end of kernel partition
+  while len(fw) < (kernel_extent - config_extent):
+    fw += "\xff"
+
+  fw += file(rootfs).read()
+
+  # Check length of total
+  if len(fw) > (flash_size - 0x10000 - config_extent):
+    raise IOError("Rootfs too large")
+
+  file(target,"wb").write(fw)
+  print "Firmware written to '%s'" % target