diff options
Diffstat (limited to 'packages/linux/nas100d-kernel.inc')
| -rw-r--r-- | packages/linux/nas100d-kernel.inc | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/packages/linux/nas100d-kernel.inc b/packages/linux/nas100d-kernel.inc new file mode 100644 index 0000000000..0c97f3c08a --- /dev/null +++ b/packages/linux/nas100d-kernel.inc @@ -0,0 +1,242 @@ +# nas100d-kernel.inc +# +# Standard definitions for any NAS 100d 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: +# +# N1K_FILES - kernel-tree path of files to install +# N1K_PATCHES - full list of patches to apply +# +# N1K_SUFFIX - the suffix to add after 'zImage-' in the +# deploy/images directory - defaults to "ludeos" +# +# -------------------------------------------------------------- +# +# Within this file bitbake variables local to the file are +# named N1K_FOO +# +SECTION = "kernel" +DESCRIPTION = "Linux kernel for the Iomega NAS 100d device" +LICENSE = "GPL" +MAINTAINER = "John Bowler <jbowler@acm.org>" + +DEPENDS += "devio-native" + +# 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): +# +# ludeos-kernel-2.6.11.2 +# nas100d-kernel/files +# nas100d-kernel/X.Y +# nas100d-kernel/X.Y.Z +# nas100d-kernel/X.Y.Z-patch +# nas100d-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 nas100d-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]) + minor = '.'.join(name[0].split('.')[0:3]) + patch_uri = [ None ] + filedir = "${FILE_DIRNAME}/nas100d-kernel/%s" + # This entry will become the last one (everything is inserted before it) + filepath = [ filedir % "files" ] + for patch in pv[1:]: + name.append(patch) + pname = '-'.join(name) + filepath[0:0] = [ filedir % pname ] + base = pname + + base = '.'.join(kernel) + patch_uri[0] = "ftp://ftp.kernel.org/pub/linux/kernel/v%s/linux-%s.tar.bz2" % (major, base) + filepath[-1:-1] = [ filedir % base ] + if base != minor: + filepath[-1:-1] = [ filedir % minor ] + filepath[-1:-1] = [ filedir % major ] + + bb.data.setVar("N1K_SRCMAJ", major, d) + # bb.note("N1K_SRCMAJ := %s" % major) + bb.data.setVar("N1K_SRCVER", base, d) + # bb.note("N1K_SRCVER := %s" % base) + bb.data.setVar("N1K_SRCURI", ' '.join(patch_uri), d) + # bb.note("N1K_SRCURI := %s" % ' '.join(patch_uri)) + bb.data.setVar("N1K_FILESPATH", ':'.join(filepath), d) + # bb.note("N1K_FILESPATH := %s" % ' '.join(filepath)) + bb.data.setVar("DEFAULT_PREFERENCE", pref-mmac, d) +} + +# FILESPATH: this list is in order last-searched-first, therefore +# the first entry is the *latest* and/or most specific +FILESPATH = "${N1K_FILESPATH}:${FILE_DIRNAME}/nas100d-kernel/" + +# The working directory will be the 'base' version (which may not be the +# same as implied by the PV variable because it corresponds to the prior +# minor version for rc and pre patched versions). +S = "${WORKDIR}/linux-${N1K_SRCVER}" + +# N1K_FILES is a list of additional files added to the source, these are +# put in place before the patches, so may themselves be patched. The list +# gives the path name relative to the base of the kernel source tree, the +# base file name is used to *find* the file. +N1K_FILES ?= "" + +N1K_SRCFILES = "${@( ' '.join([ ("file://" + n2k_file.split('/')[-1]) for n2k_file in bb.data.getVar("N1K_FILES",d,1).split(None) ]) )}" + +# N1K_PATCHES is a list of additional patches, the list specified +# here comes from the ludeos-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!) +N1K_PATCHES ?= "" + +N1K_SUFFIX ?= "ludeos" + +SRC_URI = "${N1K_SRCURI}" +SRC_URI += "${N1K_SRCFILES}" +SRC_URI += "${N1K_PATCHES}" +SRC_URI += "file://defconfig" + +COMPATIBLE_HOST = 'arm.*-linux' + +inherit kernel + +ARCH = "arm" +KERNEL_IMAGETYPE = "zImage" +# To specify the console set KERNEL_CONSOLE in the .bb file. +# CMDLINE_ROOT contains the boot options, CMDLINE_KERNEL_OPTIONS +# contains the things for a specific kernel. +CMDLINE_KERNEL_OPTIONS ?= "reboot=s" +CMDLINE_ROOT ?= "root=/dev/mtdblock4 rw rootfstype=jffs2 mem=32M@0x00000000 init=/linuxrc" +# Add distro specific debug (or non-debug) options to this +CMDLINE_DEBUG ?= "" +CMDLINE = "${CMDLINE_ROOT} ${CMDLINE_KERNEL_OPTIONS} ${CMDLINE_DEBUG} ${CMDLINE_CONSOLE}" + +# Add the architecture compiler flags to KERNEL_CC and KERNEL_LD as +# required. Notice that this has to be done for each separately built +# module as well! +KERNEL_CC += "${TARGET_CC_KERNEL_ARCH}" +KERNEL_LD += "${TARGET_LD_KERNEL_ARCH}" + +# Set EXTRAVERSION and LOCALVERSION to "" so that the kernel version +# remains pinned to the x.y.z form, also turn off the directory +# printing which provides almost all the output of an incremental build. +EXTRA_OEMAKE += "EXTRAVERSION=" +EXTRA_OEMAKE += "LOCALVERSION=" +EXTRA_OEMAKE += "MAKEFLAGS='--no-print-directory'" + +# 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 ${N1K_FILES} + do + s="$(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 ${S}/.config + if test '${ARCH_BYTE_SEX}' = le + then + sed -i '/CONFIG_CPU_BIG_ENDIAN/d' '${S}/.config' + else + echo 'CONFIG_CPU_BIG_ENDIAN=y' >>'${S}/.config' + fi + 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 +} + +# This function adds the required prefix to the image to deal with two +# problems: +# +# 1) The machine type set by RedBoot is wrong - the type for an ixdp425, not an NAS 100d +# e3a01c02 e3811055 +# 2) For LE kernels it is necessary to prefix change-to-le code to the kernel image: +# ee110f10 e3c00080 ee010f10 +# and to byte swap the (LE) image to match the BE flash layout +# +# The argument to the function is the destination directory +redboot_fixup_armeb() { + rm -f "$1".new + devio '<<arch/${ARCH}/boot/${KERNEL_IMAGETYPE}' >"$1".new \ + 'wb 0xe3a01c02,4' \ + 'wb 0xe3811055,4' \ + 'cp$' + mv "$1".new "$1" +} + +redboot_fixup_arm() { + rm -f "$1".new + devio '<<arch/${ARCH}/boot/${KERNEL_IMAGETYPE}' >"$1".new \ + 'wb 0xe3a01c02,4' \ + 'wb 0xe3811055,4' \ + 'wb 0xee110f10,4' \ + 'wb 0xe3c00080,4' \ + 'wb 0xee010f10,4' \ + 'xp $,4' || { + echo 'ERROR: arch/${ARCH}/boot/${KERNEL_IMAGETYPE}: failed to byteswap zImage' >&2 + return 1 + } + mv "$1".new "$1" +} + +do_install_append() { + redboot_fixup '${STAGING_KERNEL_DIR}/${KERNEL_IMAGETYPE}' +} + +do_deploy[dirs] = "${S}" +do_deploy() { + install -d ${DEPLOY_DIR}/images + redboot_fixup '${DEPLOY_DIR}/images/${KERNEL_IMAGETYPE}-${N1K_SUFFIX}' +} + +addtask deploy before do_build after do_compile + +python () { + # Don't build the kernel unless we're targeting an nas100d + mach = bb.data.getVar("MACHINE", d, 1) + if mach != 'nas100d': + raise bb.parse.SkipPackage("LudeOS only builds for the Iomega NAS 100d") +} |