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# nslu2-kernel.inc
#
# Standard definitions for any NSLU2 Linux kernel.
# Include this file in a .bb which specifies, at least,
# PN,PV,PR for the desired kernel
#
# Define the following *before* including this file as
# required:
#
# N2K_EXTRA_FILES - kernel-tree path of extra files to install
# N2K_FILES - kernel-tree path of files to install, defaults to:
# drivers/i2c/chips/x1205-rtc.c
# arch/arm/mach-ixp4xx/nslu2-io.c
# arch/arm/mach-ixp4xx/nslu2-setup.c
# arch/arm/mach-ixp4xx/nslu2-pci.c
# arch/arm/mach-ixp4xx/nslu2-part.c
# include/asm-arm/arch-ixp4xx/nslu2.h
# ${N2K_EXTRA_FILES}
#
# N2K_EXTRA_PATCHES - list of patches to apply (can include
# patches to the files installed above)
# N2K_PATCHES - full list of patches to apply, defaults to:
# file://nslu2_2.6.11.patch;patch=1
# file://usbnet.patch;patch=1
# file://ixp4xx_copy_from.patch;patch=1
# file://anonymiser.patch;patch=1
# ${N2K_EXTRA_PATCHES}
#
# N2K_SUFFIX - the suffix to add after 'zImage-' in the
# deploy/images directory - defaults to "openslug"
#
# Notice that the N2K_PATCHES list is appropriate for
# openslug-kernel_2.6.11.2 and probably nothing else.
#
# DEFAULT_PREFERENCE is set automagically in this file as
# follows:
#
# 10 For *released* kernels
# 8 For mm or ac patched versions of released kernels
# 6 For rc patched kernels (release candidates)
# 4 For mm or ac patched rc (release candidate) kernels
# 2 For pre or bk versions
# 0 For mm or ac patched pre or bk versions
#
# --------------------------------------------------------------
#
# Within this file bitbake variables local to the file are
# named N2K_FOO
#
SECTION = "kernel"
DESCRIPTION = "Linux kernel for the Linksys NSLU2 device"
LICENSE = "GPL"
MAINTAINER = "John Bowler <jbowler@acm.org>"
# Linux kernel source has the general form linux-X.Y.Z-patchP,
# X.Y is the major version number, Z (which may have multiple
# parts) is a sub-version and 'patch' is something like 'mm' or
# 'ac' with a patch version. The original bz2 archive will be
# in a directory/file vX.Y/linux-X.Y.Z.tar.bz2. The unpacked
# source will be in the directory linux-X.Y.Z and this directory
# name corresponds to the module directory (in /lib/modules).
#
# The corresponding .bb file should be called:
#
# package_X.Y.Z-patchP
#
# Giving PN=package PV=X.Y.Z-patchP (and PR is set in the .bb
# file). Files, including the all important defconfig, are
# searched for in the following directories (last one first):
#
# openslug-kernel-2.6.11.2
# nslu2-kernel/files
# nslu2-kernel/X.Y
# nslu2-kernel/X.Y.Z
# nslu2-kernel/X.Y.Z-patch
# nslu2-kernel/X.Y.Z-patchP
# package-X.Y.Z-patchP
#
# This allows sharing of patch files and other useful source!
# To share a file or patch with an earlier version put it in
# the shared directory - e.g. to use foo.patch on 2.6.11.2 and
# 2.6.11.4 it should be in directory nslu2-kernel/2.6.11.
#
# Note that when there are multiple patches the X.Y.Z-patch form
# uses base-patch (e.g. 2.6.12-mm) whereas X.Y.Z-patchP has the
# full form, for example 2.6.12-rc3-mm1 (in the same case).
#PN=package-name
#PV=package-version (full)
# The patch has the general form (rcN|preN|acN|mmN|bkN)* with the
# separate patch items being separated by '-' characters. The
# rc patch is first and has the important property that it
# requires the *preceding* kernel base version and that this
# will be the source directory name.
python () {
# The patches list may be empty. This code starts with the base
# kernel version and steps through the patches. Because the rc and
# pre patches actually require the *preceding* kernel version the code
# fixes that up appropriately.
pv = bb.data.getVar("PV",d,1).split('-')
kernel = pv[0].split('.')
base = pv[0]
name = [base]
major = '.'.join(name[0].split('.')[0:2])
patch_uri = [ None ]
filedir = "${FILE_DIRNAME}/nslu2-kernel/%s"
filepath = [ filedir % major ]
pref = 10
mmac = 0
for patch in pv[1:]:
name.append(patch)
pname = '-'.join(name)
if patch[0:2] == "rc" or patch[0:3] == "pre":
patch_uri.append("ftp://ftp.kernel.org/pub/linux/kernel/v%s/testing/patch-%s.bz2;patch=1;pname=%s" % (major, pname, pname))
kernel[-1] = str(int(kernel[-1]) - 1)
if patch[0:2] == "rc" and pref == 10:
pref = 6
filepath[0:0] = [ filedir % (name[0] + "-rc") ]
else:
pref = 2
elif patch[0:2] == "bk" or patch[0:3] == "git":
patch_uri.append("ftp://ftp.kernel.org/pub/linux/kernel/v%s/snapshots/patch-%s.bz2;patch=1;pname=%s" % (major, pname, pname))
pref = 2
elif patch[0:2] == "ac":
patch_uri.append("ftp://ftp.kernel.org/pub/linux/kernel/people/alan/linux-%s/%s/patch-%s" % (major, base, pname))
mmac = 2
filepath[0:0] = [ filedir % (name[0] + "-ac") ]
elif patch[0:2] == "mm":
patch_uri.append("ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/%s/%s/%s/%s.bz2;patch=1;pname=%s" % (major, base, pname, pname, pname))
mmac = 2
filepath[0:0] = [ filedir % (name[0] + "-mm") ]
else:
raise bb.build.FuncFailed("nslu2-kernel: patch %s not recognized in %s" % (patch, '-'.join(pv)))
filepath[0:0] = [ filedir % pname ]
base = pname
base = '.'.join(kernel)
patch_uri[0] = "ftp://ftp.kernel.org/pub/linux/kernel/v%s/linux-%s.tar.bz2" % (major, base)
filepath[-1:-1] = [ filedir % base ]
filepath[-1:-1] = [ filedir % "files" ]
bb.data.setVar("N2K_SRCMAJ", major, d)
# bb.note("N2K_SRCMAJ := %s" % major)
bb.data.setVar("N2K_SRCVER", base, d)
# bb.note("N2K_SRCVER := %s" % base)
bb.data.setVar("N2K_SRCURI", ' '.join(patch_uri), d)
# bb.note("N2K_SRCURI := %s" % ' '.join(patch_uri))
bb.data.setVar("N2K_FILESPATH", ':'.join(filepath), d)
# bb.note("N2K_FILESPATH := %s" % ' '.join(filepath))
bb.data.setVar("DEFAULT_PREFERENCE", pref-mmac, d)
# bb.note("DEFAULT_PREFERENCE := %s" % (pref-mmac))
}
# FILESPATH: this list is in order last-searched-first, therefore
# the first entry is the *latest* and/or most specific
FILESPATH = "${FILE_DIRNAME}/${P}:${N2K_FILESPATH}:${FILE_DIRNAME}/openslug-kernel-2.6.11.2"
# The working directory will be the 'base' version (which may not be the
# same as implied by the PV variable because it corresponds to the prior
# minor version for rc and pre patched versions).
S = "${WORKDIR}/linux-${N2K_SRCVER}"
# N2K_FILES is a list of additional files added to the source, these are
# put in place before the patches, so may themselves be patched. The list
# gives the path name relative to the base of the kernel source tree, the
# base file name is used to *find* the file.
N2K_EXTRA_FILES ?=
N2K_FILES ?= "\
drivers/i2c/chips/x1205-rtc.c \
arch/arm/mach-ixp4xx/nslu2-io.c \
arch/arm/mach-ixp4xx/nslu2-setup.c \
arch/arm/mach-ixp4xx/nslu2-pci.c \
arch/arm/mach-ixp4xx/nslu2-part.c \
include/asm-arm/arch-ixp4xx/nslu2.h \
${N2K_EXTRA_FILES}"
N2K_SRCFILES = "${@( ' '.join([ ("file://" + n2k_file.split('/')[-1]) for n2k_file in bb.data.getVar("N2K_FILES",d,1).split(None) ]) )}"
# N2K_PATCHES is a list of additional patches, the list specified
# here comes from the openslug-2.6.11.2 kernel, typically extra
# patches will be required and very often patches will need to
# be removed (i.e. the default is typically not very useful!)
N2K_EXTRA_PATCHES ?=
N2K_PATCHES ?= "\
file://nslu2_2.6.11.patch;patch=1 \
file://usbnet.patch;patch=1 \
file://ixp4xx_copy_from.patch;patch=1 \
file://anonymiser.patch;patch=1 \
${N2K_EXTRA_PATCHES}"
N2K_SUFFIX ?= "openslug"
SRC_URI = ${N2K_SRCURI}
SRC_URI += ${N2K_SRCFILES}
SRC_URI += ${N2K_PATCHES}
SRC_URI += "file://defconfig"
COMPATIBLE_HOST = 'arm.*-linux'
inherit kernel
ARCH = "arm"
KERNEL_IMAGETYPE = "zImage"
CMDLINE_CONSOLE ?= "ttyS0,115200n8"
CMDLINE_ROOT ?= "root=/dev/mtdblock4 rw rootfstype=jffs2 mem=32M@0x00000000 init=/linuxrc"
#CMDLINE_ROOT ?= "root=/dev/ram0 rw rootfstype=ext2,jffs2 initrd=0x01000000,10M init=/linuxrc mem=32M@0x00000000"
CMDLINE = "${CMDLINE_ROOT} ${CMDLINE_CONSOLE}"
# Add the architecture compiler flags to KERNEL_CC and KERNEL_LD as
# required. Notice that this has to be done for each separately built
# module as well!
KERNEL_CC += "${TARGET_CC_ARCH} -mno-thumb-interwork"
# KERNEL_LD +=
# By putting the added files in place in a separate task before
# do_patch it becomes possible to patch these files.
do_unpacklocal() {
for f in ${N2K_FILES}
do
s="$(basename "$f")"
install -m 0644 "${WORKDIR}/$s" "${S}/$f"
done
}
addtask unpacklocal before do_patch after do_unpack
do_configure_prepend() {
install -m 0644 ${WORKDIR}/defconfig ${S}/.config
echo "CONFIG_CMDLINE=\"${CMDLINE}\"" >> ${S}/.config
rm -rf ${S}/include/asm-arm/arch ${S}/include/asm-arm/proc \
${S}/include/asm-arm/.proc ${S}/include/asm-arm/.arch
}
do_deploy[dirs] = "${S}"
do_deploy() {
install -d ${DEPLOY_DIR}/images
install -m 0644 arch/${ARCH}/boot/${KERNEL_IMAGETYPE} ${DEPLOY_DIR}/images/${KERNEL_IMAGETYPE}-${N2K_SUFFIX}
}
addtask deploy before do_build after do_compile
python () {
# Don't build the kernel unless we're targeting an nslu2
mach = bb.data.getVar("MACHINE", d, 1)
if mach != 'nslu2':
raise bb.parse.SkipPackage("OpenSlug only builds for the Linksys NSLU2")
}
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