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authorJo-Philipp Wich <jow@openwrt.org>2009-09-22 01:09:04 +0000
committerJo-Philipp Wich <jow@openwrt.org>2009-09-22 01:09:04 +0000
commit92bc60d8f37f14ef4285b23141033bdb5cf57c94 (patch)
treefd68a9d1f91c5113d92b9731edff5bf7bb6adb28
parent2e50e61cf210177b7fd4cfcac9dbad39229c1759 (diff)
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[atheros] Implement a preliminary combined image format.
- add sysupgrade support for combined images by providing a platform.sh backend - use the mtd fis partition table rewrite facility to resize partitions on demand - generate generic combined images for the atheros target git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17668 3c298f89-4303-0410-b956-a3cf2f4a3e73
-rw-r--r--scripts/combined-image.sh32
-rw-r--r--target/linux/atheros/base-files/lib/upgrade/platform.sh76
-rw-r--r--target/linux/atheros/image/Makefile6
3 files changed, 114 insertions, 0 deletions
diff --git a/scripts/combined-image.sh b/scripts/combined-image.sh
new file mode 100644
index 0000000000..eecd3d7f20
--- /dev/null
+++ b/scripts/combined-image.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+BLKSZ=65536
+
+[ -f "$1" -a -f "$2" ] || {
+ echo "Usage: $0 <kernel image> <rootfs image> [output file]"
+ exit 1
+}
+
+# Make sure provided images are 64k aligned.
+kern=$(tempfile)
+root=$(tempfile)
+dd if="$1" of="$kern" bs=$BLKSZ conv=sync 2>/dev/null
+dd if="$2" of="$root" bs=$BLKSZ conv=sync 2>/dev/null
+
+# Calculate md5sum over combined kernel and rootfs image.
+md5=$(cat "$kern" "$root" | md5sum -)
+
+# Write image header followed by kernel and rootfs image.
+# The header is padded to 64k, format is:
+# CI magic word ("Combined Image")
+# <kernel length> length of kernel encoded as zero padded 8 digit hex
+# <rootfs length> length of rootfs encoded as zero padded 8 digit hex
+# <md5sum> checksum of the combined kernel and rootfs image
+( printf "CI%08x%08x%32s" \
+ $(stat -c "%s" "$kern") $(stat -c "%s" "$root") "${md5%% *}" | \
+ dd bs=$BLKSZ conv=sync;
+ cat "$kern" "$root"
+) > ${3:-openwrt-combined.img} 2>/dev/null
+
+# Clean up.
+rm -f "$kern" "$root"
diff --git a/target/linux/atheros/base-files/lib/upgrade/platform.sh b/target/linux/atheros/base-files/lib/upgrade/platform.sh
new file mode 100644
index 0000000000..d4daaacb95
--- /dev/null
+++ b/target/linux/atheros/base-files/lib/upgrade/platform.sh
@@ -0,0 +1,76 @@
+CI_BLKSZ=65536
+CI_LDADR=0x80041000
+
+platform_find_partitions() {
+ local first dev size erasesize name
+ while read dev size erasesize name; do
+ name=${name#'"'}; name=${name%'"'}
+ case "$name" in
+ vmlinux.bin.l7|kernel|linux|rootfs)
+ if [ -z "$first" ]; then
+ first="$name"
+ else
+ echo "$erasesize:$first:$name"
+ break
+ fi
+ ;;
+ esac
+ done < /proc/mtd
+}
+
+platform_find_kernelpart() {
+ local part
+ for part in "${1%:*}" "${1#*:}"; do
+ case "$part" in
+ vmlinux.bin.l7|kernel|linux)
+ echo "$part"
+ break
+ ;;
+ esac
+ done
+}
+
+platform_check_image() {
+ [ "$ARGC" -gt 1 ] && return 1
+
+ case "$(get_magic_word "$1")" in
+ # Combined Image
+ 4349)
+ local md5_img=$(dd if="$1" bs=2 skip=9 count=16 2>/dev/null)
+ local md5_chk=$(dd if="$1" bs=$CI_BLKSZ skip=1 2>/dev/null | md5sum -); md5_chk="${md5_chk%% *}"
+
+ if [ -n "$md5_img" -a -n "$md5_chk" ] && [ "$md5_img" = "$md5_chk" ]; then
+ return 0
+ else
+ echo "Invalid image. Contents do not match checksum (image:$md5_img calculated:$md5_chk)"
+ return 1
+ fi
+ ;;
+ *)
+ echo "Invalid image. Use combined .img files on this platform"
+ return 1
+ ;;
+ esac
+}
+
+platform_do_upgrade() {
+ local partitions=$(platform_find_partitions)
+ local kernelpart=$(platform_find_kernelpart "${partitions#*:}")
+ local erase_size=$((0x${partitions%%:*})); partitions="${partitions#*:}"
+ local kern_length=0x$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)
+ local kern_blocks=$(($kern_length / $CI_BLKSZ))
+ local root_blocks=$((0x$(dd if="$1" bs=2 skip=5 count=4 2>/dev/null) / $CI_BLKSZ))
+
+ if [ -n "$partitions" ] && [ -n "$kernelpart" ] && \
+ [ ${kern_blocks:-0} -gt 0 ] && \
+ [ ${root_blocks:-0} -gt ${kern_blocks:-0} ] && \
+ [ ${erase_size:-0} -gt 0 ];
+ then
+ local append=""
+ [ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
+
+ ( dd if="$1" bs=$CI_BLKSZ skip=1 count=$kern_blocks 2>/dev/null; \
+ dd if="$1" bs=$CI_BLKSZ skip=$((1+$kern_blocks)) count=$root_blocks 2>/dev/null ) | \
+ mtd -r $append -F$kernelpart:$kern_length:$CI_LDADR,rootfs write - $partitions
+ fi
+}
diff --git a/target/linux/atheros/image/Makefile b/target/linux/atheros/image/Makefile
index 40044895b8..15cd995865 100644
--- a/target/linux/atheros/image/Makefile
+++ b/target/linux/atheros/image/Makefile
@@ -51,6 +51,12 @@ define Image/Build
-p0x150000:0x2a0000:::rootfs:$(BIN_DIR)/openwrt-$(BOARD)-root.$(1) \
$(BIN_DIR)/openwrt-$(BOARD)-wpe53g-$(1).bin
+ ifeq ($(BOARD),atheros)
+ -sh $(TOPDIR)/scripts/combined-image.sh \
+ "$(BIN_DIR)/openwrt-$(BOARD)-vmlinux.lzma" \
+ "$(BIN_DIR)/openwrt-$(BOARD)-root.$(1)" \
+ "$(BIN_DIR)/openwrt-$(BOARD)-combined.img"
+ endif
endef
$(eval $(call BuildImage))