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https://github.com/drasko/codezero.git
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185 lines
6.8 KiB
Python
Executable File
185 lines
6.8 KiB
Python
Executable File
#! /usr/bin/env python2.6
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# -*- mode: python; coding: utf-8; -*-
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#
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# Codezero -- a microkernel for embedded systems.
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#
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# Copyright © 2009 B Labs Ltd
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#
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import os, sys, shelve
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from os.path import join
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PROJRELROOT = '../../'
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SCRIPTROOT = os.path.abspath(os.path.dirname("."))
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sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), PROJRELROOT)))
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from config.projpaths import *
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from config.configuration import *
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from config.lib import *
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LINUX_KERNEL_BUILDDIR = join(BUILDDIR, os.path.relpath(LINUX_KERNELDIR, PROJROOT))
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# Create linux kernel build directory path as:
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# conts/linux -> build/cont[0-9]/linux
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def source_to_builddir(srcdir, id):
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cont_builddir = \
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os.path.relpath(srcdir, \
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PROJROOT).replace("conts", \
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"cont" + str(id))
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return join(BUILDDIR, cont_builddir)
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class LinuxUpdateKernel:
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def __init__(self, container):
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self.list = (['MAGIC_SYSRQ', 'SET'],['DEBUG_KERNEL', 'SET'])
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self.modify_kernel_config()
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self.update_kernel_params(container)
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# Replace line(having input_pattern) in filename with new_data
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def replace_line(self, filename, input_pattern, new_data, prev_line):
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with open(filename, 'r+') as f:
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flag = 0
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temp = 0
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x = re.compile(input_pattern)
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for line in f:
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if '' != prev_line:
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if temp == prev_line and re.match(x, line):
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flag = 1
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break
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temp = line
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else:
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if re.match(x, line):
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flag = 1
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break
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if flag == 0:
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print 'Warning: No match found for the parameter'
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return
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else:
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# Prevent recompilation in case kernel parameter is same
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if new_data != line:
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f.seek(0)
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l = f.read()
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# Need to truncate file because, size of contents to be
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# written may be less than the size of original file.
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f.seek(0)
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f.truncate(0)
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# Write back to file
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f.write(l.replace(line, new_data))
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def update_kernel_params(self, container):
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# Update TEXT_START
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file = join(LINUX_KERNELDIR, 'arch/arm/boot/compressed/Makefile')
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param = str(conv_hex(container.linux_phys_offset))
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new_data = ('ZTEXTADDR' + '\t' + ':= ' + param + '\n')
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data_to_replace = "(ZTEXTADDR)(\t)(:= 0)"
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prev_line = ''
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self.replace_line(file, data_to_replace, new_data, prev_line)
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# Update PHYS_OFFSET
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file = join(LINUX_KERNELDIR, 'arch/arm/mach-versatile/include/mach/memory.h')
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param = str(conv_hex(container.linux_phys_offset))
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new_data = ('#define PHYS_OFFSET UL(' + param + ')\n')
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data_to_replace = "(#define PHYS_OFFSET)"
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prev_line = ''
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self.replace_line(file, data_to_replace, new_data, prev_line)
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# Update PAGE_OFFSET
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file = join(LINUX_KERNELDIR, 'arch/arm/Kconfig')
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param = str(conv_hex(container.linux_page_offset))
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new_data = ('\t' + 'default ' + param + '\n')
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data_to_replace = "(\t)(default )"
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prev_line = ('\t'+'default 0x80000000 if VMSPLIT_2G' + '\n')
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self.replace_line(file, data_to_replace, new_data, prev_line)
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# Update ZRELADDR
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file = join(LINUX_KERNELDIR, 'arch/arm/mach-versatile/Makefile.boot')
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param = str(conv_hex(container.linux_zreladdr))
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new_data = (' zreladdr-y' + '\t' + ':= ' + param + '\n')
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data_to_replace = "(\s){3}(zreladdr-y)(\t)(:= )"
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prev_line = ''
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self.replace_line(file, data_to_replace, new_data, prev_line)
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def modify_kernel_config(self):
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file = join(LINUX_KERNELDIR, 'arch/arm/configs/versatile_defconfig')
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for i in self.list:
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param = 'CONFIG_' + i[0]
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prev_line = ''
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if i[1] == 'SET':
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data_to_replace = ('# ' + param)
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new_data = (param + '=y' + '\n')
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else:
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data_to_replace = param
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new_data = ('# ' + param + ' is not set' + '\n')
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self.replace_line(file, data_to_replace, new_data, prev_line)
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class LinuxBuilder:
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def __init__(self, pathdict, container):
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self.LINUX_KERNELDIR = pathdict["LINUX_KERNELDIR"]
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# Calculate linux kernel build directory
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self.LINUX_KERNEL_BUILDDIR = \
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source_to_builddir(LINUX_KERNELDIR, container.id)
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self.linux_lds_in = join(self.LINUX_KERNELDIR, "linux.lds.in")
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self.linux_lds_out = join(self.LINUX_KERNEL_BUILDDIR, "linux.lds")
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self.linux_S_in = join(self.LINUX_KERNELDIR, "linux.S.in")
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self.linux_S_out = join(self.LINUX_KERNEL_BUILDDIR, "linux.S")
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self.linux_elf_out = join(self.LINUX_KERNEL_BUILDDIR, "linux.elf")
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self.container = container
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self.kernel_binary_image = \
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join(os.path.relpath(self.LINUX_KERNEL_BUILDDIR, LINUX_KERNELDIR), \
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"arch/arm/boot/Image")
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self.kernel_image = None
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self.kernel_updater = LinuxUpdateKernel(self.container)
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def build_linux(self):
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print '\nBuilding the linux kernel...'
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os.chdir(self.LINUX_KERNELDIR)
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if not os.path.exists(self.LINUX_KERNEL_BUILDDIR):
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os.makedirs(self.LINUX_KERNEL_BUILDDIR)
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os.system("make defconfig ARCH=arm O=" + self.LINUX_KERNEL_BUILDDIR)
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os.system("make ARCH=arm " + \
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"CROSS_COMPILE=arm-none-linux-gnueabi- O=" + \
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self.LINUX_KERNEL_BUILDDIR)
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with open(self.linux_S_in, 'r') as input:
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with open(self.linux_S_out, 'w+') as output:
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content = input.read() % self.kernel_binary_image
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output.write(content)
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os.system("arm-none-linux-gnueabi-cpp -P " + \
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"%s > %s" % (self.linux_lds_in, self.linux_lds_out))
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os.system("arm-none-linux-gnueabi-gcc -nostdlib -o %s -T%s %s" % \
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(self.linux_elf_out, self.linux_lds_out, self.linux_S_out))
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# Get the kernel image path
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self.kernel_image = self.linux_elf_out
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print 'Done...'
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def clean(self):
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print 'Cleaning linux kernel build...'
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if os.path.exists(self.LINUX_KERNEL_BUILDDIR):
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shutil.rmtree(self.LINUX_KERNEL_BUILDDIR)
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print 'Done...'
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if __name__ == "__main__":
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# This is only a default test case
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container = Container()
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container.id = 0
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linux_builder = LinuxBuilder(projpaths, container)
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if len(sys.argv) == 1:
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linux_builder.build_linux()
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elif "clean" == sys.argv[1]:
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linux_builder.clean()
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else:
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print " Usage: %s [clean]" % (sys.argv[0])
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