OpenWrt – Blame information for rev 3
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Rev | Author | Line No. | Line |
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1 | office | 1 | # The U-Boot loader of the OpenMesh devices requires image sizes and |
2 | # checksums to be provided in the U-Boot environment. |
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3 | # The OpenMesh devices come with 2 main partitions - while one is active |
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4 | # sysupgrade will flash the other. The boot order is changed to boot the |
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5 | # newly flashed partition. If the new partition can't be booted due to |
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6 | # upgrade failures the previously used partition is loaded. |
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7 | |||
8 | platform_do_upgrade_openmesh() { |
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9 | local tar_file="$1" |
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10 | local restore_backup |
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11 | local primary_kernel_mtd |
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12 | |||
13 | local setenv_script="/tmp/fw_env_upgrade" |
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14 | |||
15 | local kernel_mtd="$(find_mtd_index $PART_NAME)" |
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16 | local kernel_offset="$(cat /sys/class/mtd/mtd${kernel_mtd}/offset)" |
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17 | local total_size="$(cat /sys/class/mtd/mtd${kernel_mtd}/size)" |
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18 | |||
19 | # detect to which flash region the new image is written to. |
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20 | # |
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21 | # 1. check what is the mtd index for the first flash region on this |
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22 | # device |
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23 | # 2. check if the target partition ("inactive") has the mtd index of |
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24 | # the first flash region |
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25 | # |
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26 | # - when it is: the new bootseq will be 1,2 and the first region is |
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27 | # modified |
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28 | # - when it isnt: bootseq will be 2,1 and the second region is |
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29 | # modified |
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30 | # |
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31 | # The detection has to be done via the hardcoded mtd partition because |
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32 | # the current boot might be done with the fallback region. Let us |
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33 | # assume that the current bootseq is 1,2. The bootloader detected that |
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34 | # the image in flash region 1 is corrupt and thus switches to flash |
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35 | # region 2. The bootseq in the u-boot-env is now still the same and |
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36 | # the sysupgrade code can now only rely on the actual mtd indexes and |
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37 | # not the bootseq variable to detect the currently booted flash |
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38 | # region/image. |
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39 | # |
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40 | # In the above example, an implementation which uses bootseq ("1,2") to |
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41 | # detect the currently booted image would assume that region 1 is booted |
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42 | # and then overwrite the variables for the wrong flash region (aka the |
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43 | # one which isn't modified). This could result in a device which doesn't |
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44 | # boot anymore to Linux until it was reflashed with ap51-flash. |
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45 | local next_boot_part="1" |
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46 | case "$(board_name)" in |
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47 | openmesh,a42) |
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48 | primary_kernel_mtd=8 |
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49 | ;; |
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50 | openmesh,a62) |
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51 | primary_kernel_mtd=10 |
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52 | ;; |
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53 | *) |
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54 | echo "failed to detect primary kernel mtd partition for board" |
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55 | return 1 |
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56 | ;; |
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57 | esac |
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58 | [ "$kernel_mtd" = "$primary_kernel_mtd" ] || next_boot_part="2" |
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59 | |||
60 | local board_dir=$(tar tf $tar_file | grep -m 1 '^sysupgrade-.*/$') |
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61 | board_dir=${board_dir%/} |
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62 | |||
63 | local kernel_length=$(tar xf $tar_file ${board_dir}/kernel -O | wc -c) |
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64 | local rootfs_length=$(tar xf $tar_file ${board_dir}/root -O | wc -c) |
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65 | # rootfs without EOF marker |
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66 | rootfs_length=$((rootfs_length-4)) |
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67 | |||
68 | local kernel_md5=$(tar xf $tar_file ${board_dir}/kernel -O | md5sum); kernel_md5="${kernel_md5%% *}" |
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69 | # md5 checksum of rootfs with EOF marker |
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70 | local rootfs_md5=$(tar xf $tar_file ${board_dir}/root -O | dd bs=1 count=$rootfs_length | md5sum); rootfs_md5="${rootfs_md5%% *}" |
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71 | |||
72 | # |
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73 | # add tar support to get_image() to use default_do_upgrade() instead? |
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74 | # |
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75 | |||
76 | # take care of restoring a saved config |
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77 | [ "$SAVE_CONFIG" -eq 1 ] && restore_backup="${MTD_CONFIG_ARGS} -j ${CONF_TAR}" |
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78 | |||
3 | office | 79 | # write concatinated kernel + rootfs to flash |
80 | tar xf $tar_file ${board_dir}/kernel ${board_dir}/root -O | \ |
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81 | mtd $restore_backup write - $PART_NAME |
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1 | office | 82 | |
83 | # prepare new u-boot env |
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84 | if [ "$next_boot_part" = "1" ]; then |
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85 | echo "bootseq 1,2" > $setenv_script |
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86 | else |
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87 | echo "bootseq 2,1" > $setenv_script |
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88 | fi |
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89 | |||
90 | printf "kernel_size_%i 0x%08x\n" $next_boot_part $kernel_length >> $setenv_script |
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91 | printf "vmlinux_start_addr 0x%08x\n" ${kernel_offset} >> $setenv_script |
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92 | printf "vmlinux_size 0x%08x\n" ${kernel_length} >> $setenv_script |
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93 | printf "vmlinux_checksum %s\n" ${kernel_md5} >> $setenv_script |
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94 | |||
95 | printf "rootfs_size_%i 0x%08x\n" $next_boot_part $((total_size-kernel_length)) >> $setenv_script |
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96 | printf "rootfs_start_addr 0x%08x\n" $((kernel_offset+kernel_length)) >> $setenv_script |
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97 | printf "rootfs_size 0x%08x\n" ${rootfs_length} >> $setenv_script |
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98 | printf "rootfs_checksum %s\n" ${rootfs_md5} >> $setenv_script |
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99 | |||
100 | # store u-boot env changes |
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101 | fw_setenv -s $setenv_script || { |
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102 | echo "failed to update U-Boot environment" |
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103 | return 1 |
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104 | } |
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105 | } |
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3 | office | 106 | |
107 | # create /var/lock for the lock "fw_setenv.lock" of fw_setenv |
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108 | # the rest is copied using ipq806x's RAMFS_COPY_BIN and RAMFS_COPY_DATA |
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109 | platform_add_ramfs_ubootenv() |
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110 | { |
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111 | mkdir -p $RAM_ROOT/var/lock |
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112 | } |
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113 | append sysupgrade_pre_upgrade platform_add_ramfs_ubootenv |