2006-09-27 19:47:03 +07:00
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#!/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 $kernel.strip.gz (use if present & newer, else make)
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# -C prefix specify command prefix for cross-building tools
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# (strip, objcopy, ld)
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# -D dir specify directory containing data files used by script
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# (default ./arch/powerpc/boot)
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# -W dir specify working directory for temporary files (default .)
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2016-09-22 13:54:33 +07:00
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# -z use gzip (legacy)
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# -Z zsuffix compression to use (gz, xz or none)
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2006-09-27 19:47:03 +07:00
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2007-10-23 11:27:36 +07:00
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# Stop execution if any command fails
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set -e
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2007-10-23 11:27:31 +07:00
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# Allow for verbose output
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if [ "$V" = 1 ]; then
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set -x
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fi
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2006-09-27 19:47:03 +07:00
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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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2007-09-15 02:58:25 +07:00
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binary=
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2016-09-22 13:54:33 +07:00
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compression=.gz
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2011-04-13 03:38:55 +07:00
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pie=
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2014-04-24 14:23:39 +07:00
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format=
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2006-09-27 19:47:03 +07:00
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# cross-compilation prefix
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CROSS=
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2009-12-31 05:23:26 +07:00
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# mkimage wrapper script
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MKIMAGE=$srctree/scripts/mkuboot.sh
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2006-09-27 19:47:03 +07:00
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# directory for object and other files used by this script
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object=arch/powerpc/boot
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2007-12-03 09:52:05 +07:00
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objbin=$object
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2009-07-23 07:13:37 +07:00
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dtc=scripts/dtc/dtc
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2006-09-27 19:47:03 +07:00
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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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2016-09-22 13:54:33 +07:00
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echo ' [-D datadir] [-W workingdir] [-Z (gz|xz|none)]' >&2
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echo ' [--no-compression] [vmlinux]' >&2
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2006-09-27 19:47:03 +07:00
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exit 1
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}
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2015-10-20 00:53:26 +07:00
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run_cmd() {
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if [ "$V" = 1 ]; then
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$* 2>&1
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else
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local msg
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set +e
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msg=$($* 2>&1)
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if [ $? -ne "0" ]; then
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echo $msg
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exit 1
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fi
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set -e
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fi
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}
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2006-09-27 19:47:03 +07:00
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while [ "$#" -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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2007-12-03 09:52:05 +07:00
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objbin="$1"
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2006-09-27 19:47:03 +07:00
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;;
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-W)
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shift
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[ "$#" -gt 0 ] || usage
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tmpdir="$1"
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;;
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2016-09-22 13:54:33 +07:00
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-z)
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compression=.gz
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;;
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-Z)
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shift
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[ "$#" -gt 0 ] || usage
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[ "$1" != "gz" -o "$1" != "xz" -o "$1" != "none" ] || usage
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compression=".$1"
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if [ $compression = ".none" ]; then
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compression=
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fi
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;;
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2007-03-17 00:27:59 +07:00
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--no-gzip)
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2016-09-22 13:54:33 +07:00
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# a "feature" of the the wrapper script is that it can be used outside
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# the kernel tree. So keeping this around for backwards compatibility.
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compression=
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2007-03-17 00:27:59 +07:00
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;;
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2006-09-27 19:47:03 +07:00
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-?)
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usage
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;;
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*)
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[ -z "$kernel" ] || usage
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kernel="$1"
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;;
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esac
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shift
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done
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2016-09-22 13:54:33 +07:00
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2006-09-27 19:47:03 +07:00
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if [ -n "$dts" ]; then
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2007-12-03 09:49:24 +07:00
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if [ ! -r "$dts" -a -r "$object/dts/$dts" ]; then
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dts="$object/dts/$dts"
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fi
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2006-09-27 19:47:03 +07:00
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if [ -z "$dtb" ]; then
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dtb="$platform.dtb"
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fi
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2009-07-23 07:13:37 +07:00
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$dtc -O dtb -o "$dtb" -b 0 "$dts"
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2006-09-27 19:47:03 +07:00
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fi
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if [ -z "$kernel" ]; then
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kernel=vmlinux
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fi
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2015-11-05 18:31:34 +07:00
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LANG=C elfformat="`${CROSS}objdump -p "$kernel" | grep 'file format' | awk '{print $4}'`"
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2014-04-24 14:23:39 +07:00
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case "$elfformat" in
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elf64-powerpcle) format=elf64lppc ;;
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elf64-powerpc) format=elf32ppc ;;
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elf32-powerpc) format=elf32ppc ;;
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esac
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2016-11-28 08:42:26 +07:00
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ld_version()
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{
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# Poached from scripts/ld-version.sh, but we don't want to call that because
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# this script (wrapper) is distributed separately from the kernel source.
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# Extract linker version number from stdin and turn into single number.
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awk '{
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gsub(".*\\)", "");
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gsub(".*version ", "");
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gsub("-.*", "");
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split($1,a, ".");
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print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
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exit
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}'
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}
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# Do not include PT_INTERP segment when linking pie. Non-pie linking
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# just ignores this option.
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LD_VERSION=$(${CROSS}ld --version | ld_version)
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LD_NO_DL_MIN_VERSION=$(echo 2.26 | ld_version)
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if [ "$LD_VERSION" -ge "$LD_NO_DL_MIN_VERSION" ] ; then
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nodl="--no-dynamic-linker"
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fi
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2014-04-24 14:23:39 +07:00
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2006-09-27 19:47:03 +07:00
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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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2008-06-24 11:20:29 +07:00
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link_address='0x400000'
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2012-03-20 10:13:51 +07:00
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make_space=y
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2006-09-27 19:47:03 +07:00
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case "$platform" in
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2013-11-05 06:09:11 +07:00
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of)
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platformo="$object/of.o $object/epapr.o"
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make_space=n
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;;
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2008-06-24 11:20:29 +07:00
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pseries)
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2014-04-24 14:23:38 +07:00
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platformo="$object/pseries-head.o $object/of.o $object/epapr.o"
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2008-06-24 11:20:29 +07:00
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link_address='0x4000000'
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2014-04-24 14:23:39 +07:00
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if [ "$format" != "elf32ppc" ]; then
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link_address=
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pie=-pie
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fi
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2013-10-29 12:21:26 +07:00
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make_space=n
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2008-06-24 11:20:29 +07:00
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;;
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2010-01-29 21:18:20 +07:00
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maple)
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2013-09-24 13:10:38 +07:00
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platformo="$object/of.o $object/epapr.o"
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2010-01-29 21:18:20 +07:00
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link_address='0x400000'
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2013-10-29 12:21:26 +07:00
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make_space=n
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2010-01-29 21:18:20 +07:00
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;;
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2008-06-24 11:20:29 +07:00
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pmac|chrp)
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2013-09-24 13:10:38 +07:00
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platformo="$object/of.o $object/epapr.o"
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2013-10-29 12:21:26 +07:00
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make_space=n
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2006-09-27 19:47:03 +07:00
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;;
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2007-05-30 22:29:01 +07:00
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coff)
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2013-09-24 13:10:38 +07:00
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platformo="$object/crt0.o $object/of.o $object/epapr.o"
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2006-09-27 19:47:03 +07:00
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lds=$object/zImage.coff.lds
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2008-06-24 11:20:29 +07:00
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link_address='0x500000'
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2013-10-29 12:21:26 +07:00
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make_space=n
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2011-04-13 03:38:55 +07:00
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pie=
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2006-09-27 19:47:03 +07:00
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;;
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2011-12-02 02:35:08 +07:00
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miboot|uboot*)
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2006-09-27 19:47:03 +07:00
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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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2007-04-17 06:25:50 +07:00
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cuboot*)
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2007-09-15 02:58:25 +07:00
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binary=y
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2016-09-22 13:54:33 +07:00
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compression=
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2008-02-07 01:18:34 +07:00
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case "$platform" in
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2008-07-31 23:10:22 +07:00
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*-mpc866ads|*-mpc885ads|*-adder875*|*-ep88xc)
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2008-02-07 01:18:34 +07:00
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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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2008-05-08 19:47:00 +07:00
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*-mpc83*|*-asp834x*)
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2008-02-07 01:18:34 +07:00
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platformo=$object/cuboot-83xx.o
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;;
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2008-03-04 23:34:26 +07:00
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*-tqm8541|*-mpc8560*|*-tqm8560|*-tqm8555|*-ksi8560*)
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2008-02-07 01:18:34 +07:00
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platformo=$object/cuboot-85xx-cpm2.o
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;;
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2008-06-06 18:50:04 +07:00
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*-mpc85*|*-tqm85*|*-sbc85*)
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2008-02-07 01:18:34 +07:00
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platformo=$object/cuboot-85xx.o
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;;
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2009-02-10 19:26:11 +07:00
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*-amigaone)
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link_address='0x800000'
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;;
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2008-02-07 01:18:34 +07:00
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esac
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2007-04-17 06:25:50 +07:00
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;;
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2007-07-04 06:07:18 +07:00
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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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2016-09-22 13:54:33 +07:00
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compression=
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2007-07-04 06:07:18 +07:00
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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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2008-06-24 11:20:29 +07:00
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link_address=''
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2012-03-20 10:13:51 +07:00
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make_space=n
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2011-04-13 03:38:55 +07:00
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pie=
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2007-07-04 06:07:18 +07:00
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;;
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2008-02-21 01:33:38 +07:00
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ep88xc|ep405|ep8248e)
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2007-09-15 02:58:25 +07:00
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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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2008-02-21 01:33:38 +07:00
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adder875-redboot)
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platformo="$object/fixed-head.o $object/redboot-8xx.o"
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binary=y
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;;
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2008-03-19 00:07:43 +07:00
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simpleboot-virtex405-*)
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2008-07-03 05:11:28 +07:00
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platformo="$object/virtex405-head.o $object/simpleboot.o $object/virtex.o"
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binary=y
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;;
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simpleboot-virtex440-*)
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2009-03-11 22:36:26 +07:00
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platformo="$object/fixed-head.o $object/simpleboot.o $object/virtex.o"
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2008-03-19 00:07:43 +07:00
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binary=y
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;;
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2008-07-04 13:59:37 +07:00
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simpleboot-*)
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2009-03-11 22:36:26 +07:00
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platformo="$object/fixed-head.o $object/simpleboot.o"
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2008-07-04 13:59:37 +07:00
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binary=y
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;;
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2008-05-08 19:47:00 +07:00
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asp834x-redboot)
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platformo="$object/fixed-head.o $object/redboot-83xx.o"
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binary=y
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;;
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2009-06-12 02:43:01 +07:00
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|
|
xpedite52*)
|
|
|
|
link_address='0x1400000'
|
|
|
|
platformo=$object/cuboot-85xx.o
|
|
|
|
;;
|
2009-12-12 13:31:45 +07:00
|
|
|
gamecube|wii)
|
2009-12-12 13:31:36 +07:00
|
|
|
link_address='0x600000'
|
|
|
|
platformo="$object/$platform-head.o $object/$platform.o"
|
|
|
|
;;
|
2011-12-01 04:39:24 +07:00
|
|
|
treeboot-currituck)
|
|
|
|
link_address='0x1000000'
|
|
|
|
;;
|
2014-03-06 10:52:27 +07:00
|
|
|
treeboot-akebono)
|
|
|
|
link_address='0x1000000'
|
|
|
|
;;
|
2010-03-05 17:45:54 +07:00
|
|
|
treeboot-iss4xx-mpic)
|
|
|
|
platformo="$object/treeboot-iss4xx.o"
|
|
|
|
;;
|
2011-04-15 01:29:16 +07:00
|
|
|
epapr)
|
2015-02-11 11:55:44 +07:00
|
|
|
platformo="$object/pseries-head.o $object/epapr.o $object/epapr-wrapper.o"
|
2011-04-15 01:29:16 +07:00
|
|
|
link_address='0x20000000'
|
|
|
|
pie=-pie
|
|
|
|
;;
|
2014-01-09 09:01:22 +07:00
|
|
|
mvme5100)
|
|
|
|
platformo="$object/fixed-head.o $object/mvme5100.o"
|
|
|
|
binary=y
|
|
|
|
;;
|
2016-05-30 16:47:16 +07:00
|
|
|
mvme7100)
|
|
|
|
platformo="$object/motload-head.o $object/mvme7100.o"
|
|
|
|
link_address='0x4000000'
|
|
|
|
binary=y
|
|
|
|
;;
|
2006-09-27 19:47:03 +07:00
|
|
|
esac
|
|
|
|
|
|
|
|
vmz="$tmpdir/`basename \"$kernel\"`.$ext"
|
2007-03-17 00:27:59 +07:00
|
|
|
|
2016-09-22 13:54:33 +07:00
|
|
|
# Calculate the vmlinux.strip size
|
|
|
|
${CROSS}objcopy $objflags "$kernel" "$vmz.$$"
|
|
|
|
strip_size=$(stat -c %s $vmz.$$)
|
2011-12-15 05:59:57 +07:00
|
|
|
|
2016-09-22 13:54:33 +07:00
|
|
|
if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
|
|
|
|
# recompress the image if we need to
|
|
|
|
case $compression in
|
|
|
|
.xz)
|
|
|
|
xz --check=crc32 -f -6 "$vmz.$$"
|
|
|
|
;;
|
|
|
|
.gz)
|
2011-04-05 11:58:50 +07:00
|
|
|
gzip -n -f -9 "$vmz.$$"
|
2016-09-22 13:54:33 +07:00
|
|
|
;;
|
|
|
|
*)
|
|
|
|
# drop the compression suffix so the stripped vmlinux is used
|
|
|
|
compression=
|
|
|
|
;;
|
|
|
|
esac
|
2007-03-17 00:27:59 +07:00
|
|
|
|
2006-09-27 19:47:03 +07:00
|
|
|
if [ -n "$cacheit" ]; then
|
2016-09-22 13:54:33 +07:00
|
|
|
mv -f "$vmz.$$$compression" "$vmz$compression"
|
2006-09-27 19:47:03 +07:00
|
|
|
else
|
|
|
|
vmz="$vmz.$$"
|
|
|
|
fi
|
2011-12-15 05:59:57 +07:00
|
|
|
else
|
|
|
|
rm -f $vmz.$$
|
|
|
|
fi
|
|
|
|
|
2016-09-22 13:54:33 +07:00
|
|
|
vmz="$vmz$compression"
|
|
|
|
|
2012-03-20 10:13:51 +07:00
|
|
|
if [ "$make_space" = "y" ]; then
|
|
|
|
# Round the size to next higher MB limit
|
|
|
|
round_size=$(((strip_size + 0xfffff) & 0xfff00000))
|
2011-12-15 05:59:57 +07:00
|
|
|
|
2012-03-20 10:13:51 +07:00
|
|
|
round_size=0x$(printf "%x" $round_size)
|
|
|
|
link_addr=$(printf "%d" $link_address)
|
2011-12-15 05:59:57 +07:00
|
|
|
|
2012-03-20 10:13:51 +07:00
|
|
|
if [ $link_addr -lt $strip_size ]; then
|
|
|
|
echo "INFO: Uncompressed kernel (size 0x$(printf "%x\n" $strip_size))" \
|
|
|
|
"overlaps the address of the wrapper($link_address)"
|
|
|
|
echo "INFO: Fixing the link_address of wrapper to ($round_size)"
|
|
|
|
link_address=$round_size
|
|
|
|
fi
|
2006-09-27 19:47:03 +07:00
|
|
|
fi
|
|
|
|
|
2007-05-01 07:20:20 +07:00
|
|
|
# Extract kernel version information, some platforms want to include
|
|
|
|
# it in the image header
|
|
|
|
version=`${CROSS}strings "$kernel" | grep '^Linux version [-0-9.]' | \
|
|
|
|
cut -d' ' -f3`
|
|
|
|
if [ -n "$version" ]; then
|
|
|
|
uboot_version="-n Linux-$version"
|
|
|
|
fi
|
2007-04-17 06:25:50 +07:00
|
|
|
|
2008-04-16 02:52:29 +07:00
|
|
|
# physical offset of kernel image
|
|
|
|
membase=`${CROSS}objdump -p "$kernel" | grep -m 1 LOAD | awk '{print $7}'`
|
|
|
|
|
2007-04-17 06:25:50 +07:00
|
|
|
case "$platform" in
|
|
|
|
uboot)
|
|
|
|
rm -f "$ofile"
|
2009-12-31 05:23:26 +07:00
|
|
|
${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a $membase -e $membase \
|
2007-05-01 07:20:20 +07:00
|
|
|
$uboot_version -d "$vmz" "$ofile"
|
2006-09-27 19:47:03 +07:00
|
|
|
if [ -z "$cacheit" ]; then
|
2007-03-17 00:27:59 +07:00
|
|
|
rm -f "$vmz"
|
2006-09-27 19:47:03 +07:00
|
|
|
fi
|
|
|
|
exit 0
|
|
|
|
;;
|
2011-12-02 02:35:08 +07:00
|
|
|
uboot-obs600)
|
|
|
|
rm -f "$ofile"
|
|
|
|
# obs600 wants a multi image with an initrd, so we need to put a fake
|
|
|
|
# one in even when building a "normal" image.
|
|
|
|
if [ -n "$initrd" ]; then
|
|
|
|
real_rd="$initrd"
|
|
|
|
else
|
|
|
|
real_rd=`mktemp`
|
|
|
|
echo "\0" >>"$real_rd"
|
|
|
|
fi
|
|
|
|
${MKIMAGE} -A ppc -O linux -T multi -C gzip -a $membase -e $membase \
|
|
|
|
$uboot_version -d "$vmz":"$real_rd":"$dtb" "$ofile"
|
|
|
|
if [ -z "$initrd" ]; then
|
|
|
|
rm -f "$real_rd"
|
|
|
|
fi
|
|
|
|
if [ -z "$cacheit" ]; then
|
|
|
|
rm -f "$vmz"
|
|
|
|
fi
|
|
|
|
exit 0
|
|
|
|
;;
|
2006-09-27 19:47:03 +07:00
|
|
|
esac
|
|
|
|
|
|
|
|
addsec() {
|
|
|
|
${CROSS}objcopy $4 $1 \
|
|
|
|
--add-section=$3="$2" \
|
|
|
|
--set-section-flags=$3=contents,alloc,load,readonly,data
|
|
|
|
}
|
|
|
|
|
2007-03-17 00:27:59 +07:00
|
|
|
addsec $tmp "$vmz" $ksection $object/empty.o
|
2006-09-27 19:47:03 +07:00
|
|
|
if [ -z "$cacheit" ]; then
|
2007-03-17 00:27:59 +07:00
|
|
|
rm -f "$vmz"
|
2006-09-27 19:47:03 +07:00
|
|
|
fi
|
|
|
|
|
|
|
|
if [ -n "$initrd" ]; then
|
2006-10-17 03:49:27 +07:00
|
|
|
addsec $tmp "$initrd" $isection
|
2006-09-27 19:47:03 +07:00
|
|
|
fi
|
|
|
|
|
|
|
|
if [ -n "$dtb" ]; then
|
2006-10-17 03:49:27 +07:00
|
|
|
addsec $tmp "$dtb" .kernel:dtb
|
2006-11-09 07:50:44 +07:00
|
|
|
if [ -n "$dts" ]; then
|
|
|
|
rm $dtb
|
|
|
|
fi
|
2006-09-27 19:47:03 +07:00
|
|
|
fi
|
|
|
|
|
|
|
|
if [ "$platform" != "miboot" ]; then
|
2008-06-24 11:20:29 +07:00
|
|
|
if [ -n "$link_address" ] ; then
|
2011-04-13 03:38:55 +07:00
|
|
|
text_start="-Ttext $link_address"
|
2008-06-24 11:20:29 +07:00
|
|
|
fi
|
2016-09-22 13:54:33 +07:00
|
|
|
#link everything
|
2016-11-28 08:42:26 +07:00
|
|
|
${CROSS}ld -m $format -T $lds $text_start $pie $nodl -o "$ofile" \
|
[POWERPC] zImage: Cleanup and improve zImage entry point
This patch re-organises the way the zImage wrapper code is entered, to
allow more flexibility on platforms with unusual entry conditions.
After this patch, a platform .o file has two options:
1) It can define a _zimage_start, in which case the platform code gets
control from the very beginning of execution. In this case the
platform code is responsible for relocating the zImage if necessary,
clearing the BSS, performing any platform specific initialization, and
finally calling start() to load and enter the kernel.
2) It can define platform_init(). In this case the generic crt0.S
handles initial entry, and calls platform_init() before calling
start(). The signature of platform_init() is changed, however, to
take up to 5 parameters (in r3..r7) as they come from the platform's
initial loader, instead of a fixed set of parameters based on OF's
usage.
When using the generic crt0.S, the platform .o can optionally
supply a custom stack to use, using the BSS_STACK() macro. If this
is not supplied, the crt0.S will assume that the loader has
supplied a usable stack.
In either case, the platform code communicates information to the
generic code (specifically, a PROM pointer for OF systems, and/or an
initrd image address supplied by the bootloader) via a global
structure "loader_info".
In addition the wrapper script is rearranged to ensure that the
platform .o is always linked first. This means that platforms where
the zImage entry point is at a fixed address or offset, rather than
being encoded in the binary header can be supported using option (1).
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-03-05 10:24:52 +07:00
|
|
|
$platformo $tmp $object/wrapper.a
|
2006-09-27 19:47:03 +07:00
|
|
|
rm $tmp
|
|
|
|
fi
|
|
|
|
|
2007-05-01 07:20:20 +07:00
|
|
|
# Some platforms need the zImage's entry point and base address
|
|
|
|
base=0x`${CROSS}nm "$ofile" | grep ' _start$' | cut -d' ' -f1`
|
|
|
|
entry=`${CROSS}objdump -f "$ofile" | grep '^start address ' | cut -d' ' -f3`
|
|
|
|
|
2007-09-15 02:58:25 +07:00
|
|
|
if [ -n "$binary" ]; then
|
|
|
|
mv "$ofile" "$ofile".elf
|
2007-10-24 23:56:28 +07:00
|
|
|
${CROSS}objcopy -O binary "$ofile".elf "$ofile"
|
2007-09-15 02:58:25 +07:00
|
|
|
fi
|
|
|
|
|
2006-09-27 19:47:03 +07:00
|
|
|
# post-processing needed for some platforms
|
|
|
|
case "$platform" in
|
2010-01-29 21:18:20 +07:00
|
|
|
pseries|chrp|maple)
|
2008-10-31 18:27:17 +07:00
|
|
|
$objbin/addnote "$ofile"
|
2008-10-21 00:42:42 +07:00
|
|
|
;;
|
2007-05-30 22:29:01 +07:00
|
|
|
coff)
|
[POWERPC] zImage: Cleanup and improve zImage entry point
This patch re-organises the way the zImage wrapper code is entered, to
allow more flexibility on platforms with unusual entry conditions.
After this patch, a platform .o file has two options:
1) It can define a _zimage_start, in which case the platform code gets
control from the very beginning of execution. In this case the
platform code is responsible for relocating the zImage if necessary,
clearing the BSS, performing any platform specific initialization, and
finally calling start() to load and enter the kernel.
2) It can define platform_init(). In this case the generic crt0.S
handles initial entry, and calls platform_init() before calling
start(). The signature of platform_init() is changed, however, to
take up to 5 parameters (in r3..r7) as they come from the platform's
initial loader, instead of a fixed set of parameters based on OF's
usage.
When using the generic crt0.S, the platform .o can optionally
supply a custom stack to use, using the BSS_STACK() macro. If this
is not supplied, the crt0.S will assume that the loader has
supplied a usable stack.
In either case, the platform code communicates information to the
generic code (specifically, a PROM pointer for OF systems, and/or an
initrd image address supplied by the bootloader) via a global
structure "loader_info".
In addition the wrapper script is rearranged to ensure that the
platform .o is always linked first. This means that platforms where
the zImage entry point is at a fixed address or offset, rather than
being encoded in the binary header can be supported using option (1).
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-03-05 10:24:52 +07:00
|
|
|
${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
|
2007-12-03 09:52:05 +07:00
|
|
|
$objbin/hack-coff "$ofile"
|
2006-09-27 19:47:03 +07:00
|
|
|
;;
|
2007-04-17 06:25:50 +07:00
|
|
|
cuboot*)
|
2011-04-05 11:58:50 +07:00
|
|
|
gzip -n -f -9 "$ofile"
|
2009-12-31 05:23:26 +07:00
|
|
|
${MKIMAGE} -A ppc -O linux -T kernel -C gzip -a "$base" -e "$entry" \
|
2007-10-24 23:56:28 +07:00
|
|
|
$uboot_version -d "$ofile".gz "$ofile"
|
2007-04-17 06:25:50 +07:00
|
|
|
;;
|
2007-05-08 11:10:01 +07:00
|
|
|
treeboot*)
|
|
|
|
mv "$ofile" "$ofile.elf"
|
2007-12-03 09:52:05 +07:00
|
|
|
$objbin/mktree "$ofile.elf" "$ofile" "$base" "$entry"
|
2007-05-08 11:10:01 +07:00
|
|
|
if [ -z "$cacheit" ]; then
|
|
|
|
rm -f "$ofile.elf"
|
|
|
|
fi
|
|
|
|
exit 0
|
|
|
|
;;
|
2007-07-04 06:07:18 +07:00
|
|
|
ps3)
|
2008-03-28 03:41:45 +07:00
|
|
|
# The ps3's loader supports loading a gzipped binary image from flash
|
|
|
|
# rom to ram addr zero. The loader then enters the system reset
|
|
|
|
# vector at addr 0x100. A bootwrapper overlay is used to arrange for
|
|
|
|
# a binary image of the kernel to be at addr zero, and yet have a
|
|
|
|
# suitable bootwrapper entry at 0x100. To construct the final rom
|
|
|
|
# image 512 bytes from offset 0x100 is copied to the bootwrapper
|
|
|
|
# place holder at symbol __system_reset_kernel. The 512 bytes of the
|
|
|
|
# bootwrapper entry code at symbol __system_reset_overlay is then
|
|
|
|
# copied to offset 0x100. At runtime the bootwrapper program copies
|
|
|
|
# the data at __system_reset_kernel back to addr 0x100.
|
2007-07-04 06:07:18 +07:00
|
|
|
|
2007-10-24 23:56:28 +07:00
|
|
|
system_reset_overlay=0x`${CROSS}nm "$ofile" \
|
2007-07-04 06:07:18 +07:00
|
|
|
| grep ' __system_reset_overlay$' \
|
|
|
|
| cut -d' ' -f1`
|
|
|
|
system_reset_overlay=`printf "%d" $system_reset_overlay`
|
2007-10-24 23:56:28 +07:00
|
|
|
system_reset_kernel=0x`${CROSS}nm "$ofile" \
|
2007-07-04 06:07:18 +07:00
|
|
|
| grep ' __system_reset_kernel$' \
|
|
|
|
| cut -d' ' -f1`
|
|
|
|
system_reset_kernel=`printf "%d" $system_reset_kernel`
|
|
|
|
overlay_dest="256"
|
2008-03-28 03:41:45 +07:00
|
|
|
overlay_size="512"
|
2007-07-04 06:07:18 +07:00
|
|
|
|
2007-10-24 23:56:28 +07:00
|
|
|
${CROSS}objcopy -O binary "$ofile" "$ofile.bin"
|
|
|
|
|
2015-10-20 00:53:26 +07:00
|
|
|
run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
|
|
|
|
skip=$overlay_dest seek=$system_reset_kernel \
|
2007-10-23 11:27:36 +07:00
|
|
|
count=$overlay_size bs=1
|
2007-07-04 06:07:18 +07:00
|
|
|
|
2015-10-20 00:53:26 +07:00
|
|
|
run_cmd dd if="$ofile.bin" of="$ofile.bin" conv=notrunc \
|
|
|
|
skip=$system_reset_overlay seek=$overlay_dest \
|
2007-10-23 11:27:36 +07:00
|
|
|
count=$overlay_size bs=1
|
2007-07-04 06:07:18 +07:00
|
|
|
|
2007-12-03 09:48:03 +07:00
|
|
|
odir="$(dirname "$ofile.bin")"
|
|
|
|
rm -f "$odir/otheros.bld"
|
2011-04-05 11:58:50 +07:00
|
|
|
gzip -n --force -9 --stdout "$ofile.bin" > "$odir/otheros.bld"
|
2007-07-04 06:07:18 +07:00
|
|
|
;;
|
2006-09-27 19:47:03 +07:00
|
|
|
esac
|