Added support for ATAGS for linux kernel

scripts/linux/build_atags.py

@@ -0,0 +1,99 @@
+#! /usr/bin/env python2.6
+# -*- mode: python; coding: utf-8; -*-
+#
+#  Codezero -- a microkernel for embedded systems.
+#
+#  Copyright © 2009  B Labs Ltd
+
+import os, sys, shelve, shutil
+from os.path import join
+
+PROJRELROOT = "../.."
+SCRIPTROOT = os.path.abspath(os.path.dirname("."))
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), PROJRELROOT)))
+
+from config.projpaths import *
+from config.configuration import *
+
+# Create linux kernel build directory path as:
+# conts/linux -> build/cont[0-9]/linux
+def source_to_builddir(srcdir, id):
+    cont_builddir = \
+        os.path.relpath(srcdir, \
+                        PROJROOT).replace("conts", \
+                                          "cont" + str(id))
+    return join(BUILDDIR, cont_builddir)
+
+class AtagsBuilder:
+
+    def __init__(self, pathdict, container):
+        self.LINUX_ATAGSDIR = pathdict["LINUX_ATAGSDIR"]
+        self.LINUX_ATAGS_BUILDDIR = \
+            source_to_builddir(self.LINUX_ATAGSDIR, container.id)
+
+        self.atags_lds_in = join(self.LINUX_ATAGSDIR, "atags.lds.in")
+        self.atags_lds_out = join(self.LINUX_ATAGS_BUILDDIR, "atags.lds")
+
+        self.atags_elf_out = join(self.LINUX_ATAGS_BUILDDIR, "atags.elf")
+
+        self.atags_S_in = join(self.LINUX_ATAGSDIR, "atags.S.in")
+        self.atags_S_out = join(self.LINUX_ATAGS_BUILDDIR, "atags.S")
+
+        self.atags_c_in = join(self.LINUX_ATAGSDIR, "atags.c.in")
+        self.atags_c_out = join(self.LINUX_ATAGS_BUILDDIR, "atags.c")
+
+        self.atags_h_in = join(self.LINUX_ATAGSDIR, "atags.h.in")
+        self.atags_h_out = join(self.LINUX_ATAGS_BUILDDIR, "atags.h")
+
+        self.cont_id = container.id
+        self.elf_relpath = os.path.relpath(self.atags_elf_out, \
+                                           self.LINUX_ATAGSDIR)
+
+    def build_atags(self):
+        print 'Building Atags for linux kenel...'
+        # IO files from this build
+
+        os.chdir(LINUX_ATAGSDIR)
+        if not os.path.exists(self.LINUX_ATAGS_BUILDDIR):
+            os.makedirs(self.LINUX_ATAGS_BUILDDIR)
+
+        with open(self.atags_S_in, 'r') as input:
+            with open(self.atags_S_out, 'w+') as output:
+                output.write(input.read() % self.elf_relpath)
+
+        with open(self.atags_h_out, 'w+') as output:
+            with open(self.atags_h_in, 'r') as input:
+                output.write(input.read() % {'cn' : self.cont_id})
+
+        os.system("arm-none-linux-gnueabi-cpp -I%s -P %s > %s" % \
+                  (self.LINUX_ATAGS_BUILDDIR, self.atags_lds_in, \
+                   self.atags_lds_out))
+
+        with open(self.atags_c_out, 'w+') as output:
+            with open(self.atags_c_in, 'r') as input:
+                output.write(input.read() % {'cn' : self.cont_id})
+
+        os.system("arm-none-linux-gnueabi-gcc " + \
+                  "-g -ffreestanding -std=gnu99 -Wall -Werror " + \
+                  "-nostdlib -o %s -T%s %s" % \
+                    (self.atags_elf_out, self.atags_lds_out, self.atags_c_out))
+        print "Done..."
+
+    def clean(self):
+        print 'Cleaning Atags...'
+        if os.path.exists(self.LINUX_ATAGS_BUILDDIR):
+            shutil.rmtree(self.LINUX_ATAGS_BUILDDIR)
+        print 'Done...'
+
+if __name__ == "__main__":
+    # This is only a default test case
+    container = Container()
+    container.id = 0
+    atags_builder = AtagsBuilder(projpaths, container)
+
+    if len(sys.argv) == 1:
+        atags_builder.build_atags()
+    elif "clean" == sys.argv[1]:
+        atags_builder.clean()
+    else:
+        print " Usage: %s [clean]" % (sys.argv[0])