# 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_PATCHES - full list of patches to apply, to add files # generate a patch against /dev/null # N2K_SUFFIX - the suffix to add after 'zImage-' in the # deploy/images directory, should identify the image config # # 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 " 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): # # 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]) minor = '.'.join(name[0].split('.')[0:3]) patch_uri = [ None ] filedir = "${FILE_DIRNAME}/nslu2-kernel/%s" # This entry will become the last one (everything is inserted before it) filepath = [ filedir % "files" ] 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] ] 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 ] if base != minor: filepath[-1:-1] = [ filedir % minor ] filepath[-1:-1] = [ filedir % major ] 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}" # 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_PATCHES is the list of patches. N2K_PATCHES ?= "" # Image suffix - actually set in conf/machine/nslu2.conf as it is also # used by anything which needs to know the name of the generated image. # Should be overridden in the distro if patches or defconfig are changed. N2K_SUFFIX ?= "nslu2${ARCH_BYTE_SEX}" SRC_URI = "${N2K_SRCURI}" SRC_URI += "${N2K_PATCHES}" SRC_URI += "file://defconfig" COMPATIBLE_HOST = 'arm.*-linux' inherit kernel ARCH = "arm" KERNEL_IMAGETYPE = "zImage" # To specify the console set KERNEL_CONSOLE in the .bb file. # CMDLINE_ROOT contains the boot options, CMDLINE_KERNEL_OPTIONS # contains the things for a specific kernel. CMDLINE_KERNEL_OPTIONS ?= "reboot=s" CMDLINE_ROOT ?= "root=/dev/mtdblock4 rw rootfstype=jffs2 mem=32M@0x00000000 init=/linuxrc" # Add distro specific debug (or non-debug) options to this CMDLINE_DEBUG ?= "" CMDLINE = "${CMDLINE_ROOT} ${CMDLINE_KERNEL_OPTIONS} ${CMDLINE_DEBUG} ${CMDLINE_CONSOLE}" # Set EXTRAVERSION and LOCALVERSION to "" so that the kernel version # remains pinned to the x.y.z form, also turn off the directory # printing which provides almost all the output of an incremental build. EXTRA_OEMAKE += "EXTRAVERSION=" EXTRA_OEMAKE += "LOCALVERSION=" EXTRA_OEMAKE += "MAKEFLAGS='--no-print-directory'" # Override KERNEL_RELEASE from kernel.bbclass to match: KERNEL_RELEASE = "${KERNEL_VERSION}" addtask unpacklocal before do_patch after do_unpack # NOTE: in MM kernel builds the config options (oldconfig, menuconfig # and so on) do not allow an option to be overridden, so the following # removes the options which must be changed. do_configure_prepend() { rm -f ${S}/.config echo "CONFIG_CMDLINE=\"${CMDLINE}\"" >>'${S}/.config' if test '${ARCH_BYTE_SEX}' = be then echo 'CONFIG_CPU_BIG_ENDIAN=y' >>'${S}/.config' fi if test '${SLUGOS_IMAGESEX}' = big-endian then echo 'CONFIG_JFFS2_BIG_ENDIAN=y' >>'${S}/.config' fi if test '${SLUGOS_IMAGESEX}' = little-endian then echo 'CONFIG_JFFS2_LITTLE_ENDIAN=y' >>'${S}/.config' fi sed -e '/CONFIG_CPU_BIG_ENDIAN/d' -e '/CONFIG_CMDLINE=/d' \ -e '/CONFIG_JFFS2_NATIVE_ENDIAN=/d' \ -e '/CONFIG_JFFS2_BIG_ENDIAN=/d' \ -e '/CONFIG_JFFS2_LITTLE_ENDIAN=/d' \ '${WORKDIR}/defconfig' >>'${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 NSLU2 # 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 '<"$1".new \ 'wb 0xe3a01c02,4' \ 'wb 0xe3811055,4' \ 'cp$' mv "$1".new "$1" } redboot_fixup_arm() { rm -f "$1".new devio '<"$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 ${DEPLOY_DIR_IMAGE} redboot_fixup '${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${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("nslu2-kernel only builds for the Linksys NSLU2") }