diff options
Diffstat (limited to 'packages/linux/ixp4xx-kernel.inc')
| -rw-r--r-- | packages/linux/ixp4xx-kernel.inc | 131 |
1 files changed, 82 insertions, 49 deletions
diff --git a/packages/linux/ixp4xx-kernel.inc b/packages/linux/ixp4xx-kernel.inc index e01ba7e511..dbf9c364bb 100644 --- a/packages/linux/ixp4xx-kernel.inc +++ b/packages/linux/ixp4xx-kernel.inc @@ -10,7 +10,19 @@ # 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, should identify the image config +# 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: @@ -29,7 +41,13 @@ DESCRIPTION = "Linux kernel for the Intel IXP4xx device" LICENSE = "GPL" MAINTAINER = "NSLU2-Linux <www.nslu2-linux.org>" -DEPENDS += "devio-native" +# PACKAGE_ARCH must reliably identify what machines this kernel +# will run on +PACKAGE_ARCH = "${IXP4XX_SUFFIX}" + +# Defaults for the prefix flags +IXP4XX_MACHID ?= "" +IXP4XX_LEFIXUP ?= "" # Linux kernel source has the general form linux-X.Y.Z-patchP, # X.Y is the major version number, Z (which may have multiple @@ -147,11 +165,6 @@ S = "${WORKDIR}/linux-${IXP4XX_SRCVER}" # IXP4XX_PATCHES is the list of patches. IXP4XX_PATCHES ?= "" -# Image suffix - actually set in conf/machine/ixp4xx.conf as it is also -# used by anything which needs to know the name of the generated image. -# Should be overridden in the distro if patches or defconfig are changed. -IXP4XX_SUFFIX ?= "ixp4xx${ARCH_BYTE_SEX}" - SRC_URI = "${IXP4XX_SRCURI}" SRC_URI += "${IXP4XX_PATCHES}" SRC_URI += "file://defconfig" @@ -171,16 +184,17 @@ KERNEL_IMAGETYPE = "zImage" # in local.conf will still take precedence. # # CMDLINE_KERNEL_OPTIONS: overridable in local.conf -MACH_KERNEL_OPTIONS = "x1205.hctosys=1 x1205.probe=0,0x6f pcf8563.hctosys=1" -MACH_KERNEL_OPTIONS_nas100d = "pcf8563.hctosys=1" -MACH_KERNEL_OPTIONS_nslu2 = "rtc-x1205.hctosys=1 rtc-x1205.probe=0,0x6f" +# 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, do not override -CMDLINE_ROOT = "init=/linuxrc" -CMDLINE_ROOT_loft = "root=/dev/mtdblock2 rw rootfstype=jffs2 mem=64M@0x00000000 init=/linuxrc" -CMDLINE_ROOT_nas100d = "root=/dev/mtdblock2 rw rootfstype=jffs2 mem=64M@0x00000000 init=/linuxrc" -CMDLINE_ROOT_nslu2 = "root=/dev/mtdblock4 rw rootfstype=jffs2 mem=32M@0x00000000 init=/linuxrc" +# 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 @@ -230,56 +244,75 @@ do_configure_prepend() { ${S}/include/asm-arm/.proc ${S}/include/asm-arm/.arch } -# This function adds the required prefix to the image to deal with two -# problems on NSLU2. +# 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 RedBoot is wrong - the type for an ixdp425, not an IXP4XX -# e3a01c02 e3811055 -# 2) For LE kernels it is necessary to prefix change-to-le code to the kernel image: -# ee110f10 e3c00080 ee010f10 +# 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 -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 "$1" -} -redboot_fixup_arm() { +#SETMACH: set the machine id (register 1) to IXP4XX_MACHID +SETMACH = '${@["", ".= ${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 \ - 'wb 0xe3a01c02,4' \ - 'wb 0xe3811055,4' \ - 'wb 0xee110f10,4' \ - 'wb 0xe3c00080,4' \ - 'wb 0xee010f10,4' \ - 'xp $,4' || { - echo 'ERROR: arch/${ARCH}/boot/${KERNEL_IMAGETYPE}: failed to byteswap zImage' >&2 + devio '<<arch/${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 "$1" } -do_install_append_nslu2() { - redboot_fixup '${STAGING_KERNEL_DIR}/${KERNEL_IMAGETYPE}' -} - -deploy_image_nslu2() { - redboot_fixup '${DEPLOY_DIR}/images/${KERNEL_IMAGETYPE}-${IXP4XX_SUFFIX}' -} - -deploy_image() { - install -m 644 arch/${ARCH}/boot/${KERNEL_IMAGETYPE} ${DEPLOY_DIR}/images/${KERNEL_IMAGETYPE}-${IXP4XX_SUFFIX} +do_install_append() { + copy_image '${STAGING_KERNEL_DIR}/${KERNEL_IMAGETYPE}' } do_deploy[dirs] = "${S}" do_deploy() { install -d ${DEPLOY_DIR}/images - deploy_image + copy_image '${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") +} |