2543133381
Currently, the kernel uses CONFIG_DEVICE_TREE to wrap a kernel image with a fdt blob which means for any given configuration only one dts file can be selected and so support for only one board can be built This moves the selection of the default .dts file out of the kernel config and into the bootwrapper makefile. The makefile chooses which images to build based on the kernel config and the dts source file name is taken directly from the image name. For example "cuImage.ebony" will use "ebony.dts" as the device tree source file. In addition, this patch allows a specific image to be requested from the command line by adding "cuImage.%" and "treeImage.%" targets to the list of valid built targets in arch/powerpc/Makefile. This allows the default dts selection to be overridden. Another advantage to this change is it allows a single defconfig to be supplied for all boards using the same chip family and only differing in the device tree. Important note: This patch adds two new zImage targets; zImage.dtb.% and zImage.dtb.initrd.% for zImages with embedded dtb files. Currently there are 5 platforms which require this: ps3, ep405, mpc885ads, ep88xc, adder875-redboot and ep8248e. This patch *changes the zImage filenames* for those platforms. ie. 'zImage.ps3' is now 'zImage.dtb.ps3'. This new zImage.dtb targets were added so that the .dts file could be part of the dependancies list for building them. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Paul Mackerras <paulus@samba.org>
333 lines
7.5 KiB
Bash
Executable file
333 lines
7.5 KiB
Bash
Executable file
#!/bin/sh
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# Copyright (C) 2006 Paul Mackerras, IBM Corporation <paulus@samba.org>
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# This program may be used under the terms of version 2 of the GNU
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# General Public License.
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# This script takes a kernel binary and optionally an initrd image
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# and/or a device-tree blob, and creates a bootable zImage for a
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# given platform.
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# Options:
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# -o zImage specify output file
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# -p platform specify platform (links in $platform.o)
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# -i initrd specify initrd file
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# -d devtree specify device-tree blob
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# -s tree.dts specify device-tree source file (needs dtc installed)
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# -c cache $kernel.strip.gz (use if present & newer, else make)
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# -C prefix specify command prefix for cross-building tools
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# (strip, objcopy, ld)
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# -D dir specify directory containing data files used by script
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# (default ./arch/powerpc/boot)
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# -W dir specify working directory for temporary files (default .)
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# Stop execution if any command fails
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set -e
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# Allow for verbose output
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if [ "$V" = 1 ]; then
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set -x
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fi
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# defaults
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kernel=
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ofile=zImage
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platform=of
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initrd=
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dtb=
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dts=
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cacheit=
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binary=
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gzip=.gz
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# cross-compilation prefix
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CROSS=
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# directory for object and other files used by this script
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object=arch/powerpc/boot
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objbin=$object
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# directory for working files
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tmpdir=.
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usage() {
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echo 'Usage: wrapper [-o output] [-p platform] [-i initrd]' >&2
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echo ' [-d devtree] [-s tree.dts] [-c] [-C cross-prefix]' >&2
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echo ' [-D datadir] [-W workingdir] [--no-gzip] [vmlinux]' >&2
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exit 1
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}
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while [ "$#" -gt 0 ]; do
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case "$1" in
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-o)
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shift
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[ "$#" -gt 0 ] || usage
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ofile="$1"
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;;
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-p)
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shift
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[ "$#" -gt 0 ] || usage
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platform="$1"
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;;
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-i)
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shift
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[ "$#" -gt 0 ] || usage
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initrd="$1"
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;;
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-d)
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shift
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[ "$#" -gt 0 ] || usage
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dtb="$1"
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;;
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-s)
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shift
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[ "$#" -gt 0 ] || usage
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dts="$1"
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;;
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-c)
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cacheit=y
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;;
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-C)
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shift
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[ "$#" -gt 0 ] || usage
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CROSS="$1"
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;;
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-D)
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shift
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[ "$#" -gt 0 ] || usage
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object="$1"
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objbin="$1"
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;;
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-W)
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shift
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[ "$#" -gt 0 ] || usage
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tmpdir="$1"
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;;
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--no-gzip)
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gzip=
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;;
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-?)
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usage
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;;
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*)
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[ -z "$kernel" ] || usage
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kernel="$1"
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;;
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esac
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shift
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done
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if [ -n "$dts" ]; then
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if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
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dts="$object/dts/$dts"
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fi
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if [ -z "$dtb" ]; then
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dtb="$platform.dtb"
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fi
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$object/dtc -O dtb -o "$dtb" -b 0 "$dts"
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fi
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if [ -z "$kernel" ]; then
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kernel=vmlinux
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fi
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platformo=$object/"$platform".o
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lds=$object/zImage.lds
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ext=strip
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objflags=-S
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tmp=$tmpdir/zImage.$$.o
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ksection=.kernel:vmlinux.strip
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isection=.kernel:initrd
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case "$platform" in
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pmac|pseries|chrp)
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platformo=$object/of.o
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;;
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coff)
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platformo=$object/of.o
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lds=$object/zImage.coff.lds
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;;
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miboot|uboot)
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# miboot and U-boot want just the bare bits, not an ELF binary
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ext=bin
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objflags="-O binary"
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tmp="$ofile"
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ksection=image
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isection=initrd
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;;
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cuboot*)
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binary=y
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gzip=
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case "$platform" in
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*-mpc885ads|*-adder875*|*-ep88xc)
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platformo=$object/cuboot-8xx.o
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;;
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*5200*|*-motionpro)
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platformo=$object/cuboot-52xx.o
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;;
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*-pq2fads|*-ep8248e|*-mpc8272*|*-storcenter)
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platformo=$object/cuboot-pq2.o
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;;
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*-mpc824*)
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platformo=$object/cuboot-824x.o
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;;
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*-mpc83*)
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platformo=$object/cuboot-83xx.o
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;;
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*-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555*)
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platformo=$object/cuboot-85xx-cpm2.o
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;;
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*-mpc85*)
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platformo=$object/cuboot-85xx.o
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;;
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esac
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;;
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ps3)
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platformo="$object/ps3-head.o $object/ps3-hvcall.o $object/ps3.o"
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lds=$object/zImage.ps3.lds
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gzip=
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ext=bin
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objflags="-O binary --set-section-flags=.bss=contents,alloc,load,data"
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ksection=.kernel:vmlinux.bin
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isection=.kernel:initrd
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;;
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ep88xc|ep405|redboot*|ep8248e)
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platformo="$object/fixed-head.o $object/$platform.o"
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binary=y
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;;
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esac
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vmz="$tmpdir/`basename \"$kernel\"`.$ext"
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if [ -z "$cacheit" -o ! -f "$vmz$gzip" -o "$vmz$gzip" -ot "$kernel" ]; then
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${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
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if [ -n "$gzip" ]; then
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gzip -f -9 "$vmz.$$"
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fi
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if [ -n "$cacheit" ]; then
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mv -f "$vmz.$$$gzip" "$vmz$gzip"
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else
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vmz="$vmz.$$"
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fi
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fi
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vmz="$vmz$gzip"
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# Extract kernel version information, some platforms want to include
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# it in the image header
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version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
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cut -d' ' -f3`
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if [ -n "$version" ]; then
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uboot_version="-n Linux-$version"
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fi
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case "$platform" in
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uboot)
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rm -f "$ofile"
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mkimage -A ppc -O linux -T kernel -C gzip -a 00000000 -e 00000000 \
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$uboot_version -d "$vmz" "$ofile"
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if [ -z "$cacheit" ]; then
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rm -f "$vmz"
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fi
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exit 0
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;;
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esac
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addsec() {
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${CROSS}objcopy $4 $1 \
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--add-section=$3="$2" \
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--set-section-flags=$3=contents,alloc,load,readonly,data
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}
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addsec $tmp "$vmz" $ksection $object/empty.o
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if [ -z "$cacheit" ]; then
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rm -f "$vmz"
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fi
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if [ -n "$initrd" ]; then
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addsec $tmp "$initrd" $isection
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fi
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if [ -n "$dtb" ]; then
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addsec $tmp "$dtb" .kernel:dtb
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if [ -n "$dts" ]; then
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rm $dtb
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fi
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fi
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if [ "$platform" != "miboot" ]; then
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${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
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$platformo $tmp $object/wrapper.a
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rm $tmp
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fi
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# Some platforms need the zImage's entry point and base address
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base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
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entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
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if [ -n "$binary" ]; then
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mv "$ofile" "$ofile".elf
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${CROSS}objcopy -O binary "$ofile".elf "$ofile"
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fi
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# post-processing needed for some platforms
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case "$platform" in
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pseries|chrp)
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$objbin/addnote "$ofile"
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;;
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coff)
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${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
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$objbin/hack-coff "$ofile"
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;;
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cuboot*)
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gzip -f -9 "$ofile"
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mkimage -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
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$uboot_version -d "$ofile".gz "$ofile"
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;;
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treeboot*)
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mv "$ofile" "$ofile.elf"
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$objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
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if [ -z "$cacheit" ]; then
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rm -f "$ofile.elf"
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fi
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exit 0
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;;
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ps3)
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# The ps3's loader supports loading gzipped binary images from flash
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# rom to addr zero. The loader enters the image at addr 0x100. A
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# bootwrapper overlay is use to arrange for the kernel to be loaded
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# to addr zero and to have a suitable bootwrapper entry at 0x100.
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# To construct the rom image, 0x100 bytes from offset 0x100 in the
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# kernel is copied to the bootwrapper symbol __system_reset_kernel.
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# The 0x100 bytes at the bootwrapper symbol __system_reset_overlay is
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# then copied to offset 0x100. At runtime the bootwrapper program
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# copies the 0x100 bytes at __system_reset_kernel to addr 0x100.
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system_reset_overlay=0x`${CROSS}nm "$ofile" \
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| grep ' __system_reset_overlay$' \
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| cut -d' ' -f1`
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system_reset_overlay=`printf "%d" $system_reset_overlay`
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system_reset_kernel=0x`${CROSS}nm "$ofile" \
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| grep ' __system_reset_kernel$' \
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| cut -d' ' -f1`
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system_reset_kernel=`printf "%d" $system_reset_kernel`
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overlay_dest="256"
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overlay_size="256"
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${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
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dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
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skip=$overlay_dest seek=$system_reset_kernel \
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count=$overlay_size bs=1
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dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
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skip=$system_reset_overlay seek=$overlay_dest \
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count=$overlay_size bs=1
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odir="$(dirname "$ofile.bin")"
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rm -f "$odir/otheros.bld"
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gzip --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
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;;
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esac
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