diff options
Diffstat (limited to 'packages/linux/ixp4xx-kernel.inc')
| -rw-r--r-- | packages/linux/ixp4xx-kernel.inc | 156 |
1 files changed, 139 insertions, 17 deletions
diff --git a/packages/linux/ixp4xx-kernel.inc b/packages/linux/ixp4xx-kernel.inc index 54679ebfdf..233d2a655c 100644 --- a/packages/linux/ixp4xx-kernel.inc +++ b/packages/linux/ixp4xx-kernel.inc @@ -7,22 +7,43 @@ # Define the following *before* including this file as # required: # -# IXP4XX_PATCHES - full list of patches to apply -# +# IXP4XX_PATCHES - full list of patches to apply, to add files +# generate a patch against /dev/null # IXP4XX_SUFFIX - the suffix to add after 'zImage-' in the -# deploy/images directory - defaults to "ixp4xx" +# deploy/images directory, should identify the machines the +# kernel will run on, ixp4xx[lb] for generic kernels (le or +# be). Controls the package architecture of the ipk. +# IXP4XX_MACHID - if set the kernel will be forced to use this +# machine id and be forced to LE on LE systems - please always +# remember to override IXP4XX_SUFFIX if this is done, the kernel +# will simply not work on other machines. +# IXP4XX_LEFIXUP - if set prepend the LE fixup code to the kernel +# and byte swap (quad word) the whole kernel image for a BE +# boot loader # -# -------------------------------------------------------------- +# If you set CMDLINE_ROOT you should *also* change IXP4XX_SUFFIX +# because the resultant kernel may not work on other systems. +# +# DEFAULT_PREFERENCE is set automagically in this file as +# follows: # -# Within this file bitbake variables local to the file are -# named N1K_FOO +# 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 +# +# -------------------------------------------------------------- # SECTION = "kernel" DESCRIPTION = "Linux kernel for the Intel IXP4xx device" LICENSE = "GPL" MAINTAINER = "NSLU2-Linux <www.nslu2-linux.org>" -DEPENDS += "devio-native" +# Defaults for the prefix flags +IXP4XX_MACHID ?= "" +IXP4XX_LEFIXUP ?= "" # Linux kernel source has the general form linux-X.Y.Z-patchP, # X.Y is the major version number, Z (which may have multiple @@ -130,18 +151,16 @@ python () { # FILESPATH: this list is in order last-searched-first, therefore # the first entry is the *latest* and/or most specific -FILESPATH = "${IXP4XX_FILESPATH}:${FILE_DIRNAME}/ixp4xx-kernel/" +FILESPATH = "${FILE_DIRNAME}/${P}:${IXP4XX_FILESPATH}" # The working directory will be the 'base' version (which may not be the # same as implied by the PV variable because it corresponds to the prior # minor version for rc and pre patched versions). S = "${WORKDIR}/linux-${IXP4XX_SRCVER}" -# IXP4XX_PATCHES is a list of additional patches to apply +# IXP4XX_PATCHES is the list of patches. IXP4XX_PATCHES ?= "" -IXP4XX_SUFFIX ?= "ixp4xx" - SRC_URI = "${IXP4XX_SRCURI}" SRC_URI += "${IXP4XX_PATCHES}" SRC_URI += "file://defconfig" @@ -150,15 +169,38 @@ COMPATIBLE_HOST = 'arm.*-linux' inherit kernel +# PACKAGE_ARCH must reliably identify what machines this kernel +# will run on +PACKAGE_ARCH_kernel-image = "${IXP4XX_SUFFIX}" +PACKAGE_ARCH_kernel-dev = "${IXP4XX_SUFFIX}" +PACKAGE_ARCH_kernel = "${IXP4XX_SUFFIX}" + 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_KERNEL_OPTIONS ?= -CMDLINE_ROOT = "root=/dev/mtdblock2 rw rootfstype=jffs2 mem=64M@0x00000000 init=/linuxrc" -CMDLINE_DEBUG = +# +# These are set from MACHINE specific defaults below, but an override +# in local.conf will still take precedence. +# +# CMDLINE_KERNEL_OPTIONS: overridable in local.conf +# MACH_KERNEL_OPTIONS: the default, added to so additional stuff can be +# put in from local.conf etc. +MACH_KERNEL_OPTIONS += "rtc-x1205.hctosys=1 rtc-x1205.probe=0,0x6f" +MACH_KERNEL_OPTIONS += "rtc-ds1672.probe=0,0x68 rtc-ds1672.hctosys=1" +MACH_KERNEL_OPTIONS += "pcf8563.hctosys=1" +# +CMDLINE_KERNEL_OPTIONS ?= "${MACH_KERNEL_OPTIONS}" + +# CMDLINE_ROOT: machine specific boot options - should not be set on a +# generic kernel! +CMDLINE_ROOT ?= "init=/linuxrc" + +# CMDLINE_DEBUG: debug options such as noirqdebug, defaults to empty +# override in local.conf etc +CMDLINE_DEBUG ?= "" CMDLINE = "${CMDLINE_ROOT} ${CMDLINE_KERNEL_OPTIONS} ${CMDLINE_DEBUG} ${CMDLINE_CONSOLE}" # Add the architecture compiler flags to KERNEL_CC and KERNEL_LD as @@ -177,6 +219,9 @@ EXTRA_OEMAKE += "MAKEFLAGS='--no-print-directory'" # Override KERNEL_RELEASE from kernel.bbclass to match: KERNEL_RELEASE = "${KERNEL_VERSION}" +# Set the correct CONFIG_CPU_xxx_ENDIAN and CONFIG_CMDLINE at the head +# of the .config file and remove any settings in defconfig then append +# defconfig to .config do_configure_prepend() { rm -f ${S}/.config echo "CONFIG_CMDLINE=\"${CMDLINE}\"" >>'${S}/.config' @@ -184,15 +229,92 @@ do_configure_prepend() { then echo 'CONFIG_CPU_BIG_ENDIAN=y' >>'${S}/.config' fi - sed -e '/CONFIG_CPU_BIG_ENDIAN/d' -e '/CONFIG_CMDLINE=/d' '${WORKDIR}/defconfig' >>'${S}/.config' + 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 ${S}/include/asm-arm/.arch } +# IXP4XX_MACHID and IXP4XX_LEFIXUP handling +# +# This mach_fixup function adds the required prefix to the image to +# force the machine id in the kernel to be a particular value. For +# LE builds it also forces the CPU into LE mode - this is actually +# harmless even if the CPU is already in LE mode. This deals with +# two known problems on some boards: +# +# 1) The machine type set by the boot loader is wrong - e.g. the type +# for an ixdp425, not the actual board type. Prefix the code with +# two instructions: +# e3a01c<hh> e38110<ll> +# Where the machine ID is 0xhhll +# 2) For LE kernels it is necessary to prefix change-to-le code to +# the kernel image if the boot loader runs with the CPU in BE +# (which is normal for IXP4XX boards): +# ee110f10 e3c00080 ee010f10 +# and to byte swap the (LE) image to match the BE flash layout +# +# (2) is not required with an LE boot loader (neither the prefix +# nor the byte swapping) so this is controlled by a separate flag, +# however if the boot loader is LE it expects and LE image so the +# instructions written for the machine id must be LE. +# +# The argument to the function is the destination directory + +#SETMACH: set the machine id (register 1) to IXP4XX_MACHID +SETMACH = '${@["", ".= ${IXP4XX_MACHID} .256/ 255& 0xe3a01c00+; ${WRITE}; .= 255& 0xe3811000+; ${WRITE};"][bb.data.getVar("IXP4XX_MACHID", d, 1) and 1]}' + +#FIXUP: the correct instructions to copy the kernel prepended with the le fixup +FIXUP_armeb = 'cp$' +FIXUP_arm = '${@["cp$", "wb 0xee110f10,4;wb 0xe3c00080,4;wb 0xee010f10,4;xp $,4"][bb.data.getVar("IXP4XX_LEFIXUP", d, 1) and 1]}' + +#WRITE: the correct way to write a single ARM instruction (wb unless LE and !LEFIXUP). +WRITE_armeb = 'wb 4' +WRITE_arm = '${@["wl 4", "wb 4"][bb.data.getVar("IXP4XX_LEFIXUP", d, 1) and 1]}' + +DEPENDS += "devio-native" + +# ${SETMACH}${FIXUP} is a sequence of devio commands to copy the image, +# in the standard (generic) case it is just 'cp$' +copy_image() { + rm -f "$1".new + devio '<<arch/${ARCH}/boot/${KERNEL_IMAGETYPE}' >"$1".new '${SETMACH}${FIXUP}' || { + echo 'ERROR: arch/${ARCH}/boot/${KERNEL_IMAGETYPE}: failed to copy zImage' >&2 + return 1 + } + mv "$1".new "$1" +} + +do_install_append() { + copy_image '${STAGING_KERNEL_DIR}/${KERNEL_IMAGETYPE}' +} + do_deploy[dirs] = "${S}" do_deploy() { install -d ${DEPLOY_DIR}/images - install -m 644 arch/${ARCH}/boot/${KERNEL_IMAGETYPE} ${DEPLOY_DIR}/images/${KERNEL_IMAGETYPE}-${IXP4XX_SUFFIX} + copy_image '${DEPLOY_DIR}/images/${KERNEL_IMAGETYPE}-${IXP4XX_SUFFIX}' } addtask deploy before do_build after do_compile + +python () { + # check for IXP4XX_SUFFIX - if not set then we don't know what to build, + # also sanity check the SLUGOS_IMAGESEX + sex = bb.data.getVar("SLUGOS_IMAGESEX", d, 1) + if sex != 'little-endian' and sex != 'big-endian': + raise bb.parse.SkipPackage("slugos kernels require SLUGOS_IMAGESEX") + suffix = bb.data.getVar("IXP4XX_SUFFIX", d, 1) + if suffix == '': + raise bb.parse.SkipPackage("slugos kernels require IXP4XX_SUFFIX") +} |