'V‘HŸ[M›žð,ÁƒÀÎBoot script,¹# This is a boot script for U-Boot # Generate boot.scr: # mkimage -c none -A arm -T script -d boot.cmd.default boot.scr # ################ fitimage_name=/boot/image.ub kernel_name=/boot/Image ramdisk_name=/boot/petalinux-initramfs-image-eval-brd-sc-zynqmp.cpio.gz.u-boot rootfs_name=/boot/rootfs.cpio.gz.u-boot #Set DT selection if test "${board_name}-${board_rev}" = "VEK280-B01" || test "${board_name}-${board_rev}" = "VEK280-B02" || test "${board_name}-${board_rev}" = "VEK280-B03"; then dtb_name=/boot/devicetree/system-sc-revc-zynqmp.dtb else dtb_name=/boot/system.dtb fi setenv bootargs 'earlycon console=ttyPS0,115200 clk_ignore_unused root=/dev/ram0 rw init_fatal_sh=1 uio_pdrv_genirq.of_id=generic-uio'; for boot_target in ${boot_targets}; do echo "Trying to load boot images from ${boot_target}" if test "${boot_target}" = "jtag" ; then echo "JTAG boot" booti 0x00200000 0x04000000 0x00100000 fi if test "${boot_target}" = "usb0" || test "${boot_target}" = "usb1"; then if test -e ${devtype} ${devnum}:${distro_bootpart} /boot/uEnv.txt; then echo "Importing environment(uEnv.txt) from ${boot_target}..." fatload ${devtype} ${devnum}:${distro_bootpart} 0x00200000 /boot/uEnv.txt; env import -t 0x00200000 $filesize if test -n $uenvcmd; then echo "Running uenvcmd ..."; run uenvcmd; fi fi if test -e ${devtype} ${devnum}:${distro_bootpart} ${fitimage_name}; then echo "loading fitimage ${fitimage_name} to 0x10000000" fatload ${devtype} ${devnum}:${distro_bootpart} 0x10000000 ${fitimage_name}; bootm 0x10000000; fi if test -e ${devtype} ${devnum}:${distro_bootpart} ${kernel_name}; then echo "loading kernel ${kernel_name} to 0x00200000" fatload ${devtype} ${devnum}:${distro_bootpart} 0x00200000 ${kernel_name}; fi if test -e ${devtype} ${devnum}:${distro_bootpart} ${dtb_name}; then echo "loading device tree ${dtb_name} to 0x00100000" fatload ${devtype} ${devnum}:${distro_bootpart} 0x00100000 ${dtb_name}; fi if test -e ${devtype} ${devnum}:${distro_bootpart} ${ramdisk_name} && test "${skip_tinyramdisk}" != "yes"; then echo "booting ramdisk ${ramdisk_name} at 0x04000000" fatload ${devtype} ${devnum}:${distro_bootpart} 0x04000000 ${ramdisk_name}; booti 0x00200000 0x04000000 0x00100000 fi if test -e ${devtype} ${devnum}:${distro_bootpart} ${rootfs_name} && test "${skip_ramdisk}" != "yes"; then echo "booting rootfs/ramdisk ${rootfs_name} from 0x04000000" fatload ${devtype} ${devnum}:${distro_bootpart} 0x04000000 ${rootfs_name}; booti 0x00200000 0x04000000 0x00100000 fi echo "booting kernel from RAM" booti 0x00200000 - 0x00100000 fi if test "${boot_target}" = "mmc0" || test "${boot_target}" = "mmc1"; then # Part of any A/B support logic requires setting and saving some variables into a non-volatile # U-Boot environment storage (i.e. 'env save'). Unfortunately early versions of this device's # U-Boot were configured to store the environment in the same place where the Xilinx Boot Image # Recovery Tool is stored. If this script blindly does an 'env save' the user's ability to # load a new image through the BIRT might go away if the user is using a new Linux rootfs image # (eMMC) with an older U-Boot (boot.bin in QSPI). Merely checking the U-Boot version will not # suffice; both before and after the fix the U-Boot version is the same. Therefore in order to # detect a new versus old U-Boot the boot.bin in the QSPI must be examined; if it contains # the string 'SC-BootFW' at offset 0x70 then we know this is a new U-Boot and can proceed # with the A/B logic, otherwise we have to fall back to non A/B behaviour. # # Further complicating the situation, there are 2 boot.bins, therefore the code must start by # figuring out which of the two is running. This can be determined by examining the values # in the "Persistent Registers" section (QSPI, mtd2, 0x0020.0000). Data in the "Persistent # Registers" section not only describes which of the two boot.bins is running, but also # provides the offsets for finding both images in the QSPI. # # As a further complication there is a "Persistent Registers Backup" section (QSPI, mtd3, # 0x00f8.0000) in case the primary is bad. # # Also, U-Boot's shell/scripting language is very primitive. It can't compare strings # directly, it can only compare blocks of RAM to each other. Also there is no way to place # a string into RAM directly (to compare against) so the compare-to string must be placed # in RAM one byte at a time. # # The choice to use ${kernel_addr_r} as a scratch pad is completely arbitrary. env set DO_RAUC env set CMP2 env set FOUND_PREG env set PREG env set LAST_BOOTED_IMAGE env set IMAGE_OFFSET env set IMAGE_VERSION env set saved_kernel_addr_r $kernel_addr_r echo "*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*" echo "* checking to see if env save is safe *" echo "*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*" DO_RAUC=1 # place the compare-to string 'SC-BootFW' in RAM at $kernel_addr_r + 0x20 setexpr CMP2 $kernel_addr_r + 0x20 mw.b $CMP2 0x53 setexpr CMP2 $CMP2 + 1 mw.b $CMP2 0x43 setexpr CMP2 $CMP2 + 1 mw.b $CMP2 0x2d setexpr CMP2 $CMP2 + 1 mw.b $CMP2 0x42 setexpr CMP2 $CMP2 + 1 mw.b $CMP2 0x6f setexpr CMP2 $CMP2 + 1 mw.b $CMP2 0x6f setexpr CMP2 $CMP2 + 1 mw.b $CMP2 0x74 setexpr CMP2 $CMP2 + 1 mw.b $CMP2 0x46 setexpr CMP2 $CMP2 + 1 mw.b $CMP2 0x57 # leave CMP2 pointing at the start of the compare-to string setexpr CMP2 $kernel_addr_r + 0x20 # probe QSPI sf probe if itest $? != 0; then echo "QSPI probe NOT successful" DO_RAUC=0 else echo "QSPI probe successful" fi # put 9 bytes of offset 0x70 of the active boot.bin in RAM @ $kernel_addr_r # the layout of the Persistent Registers area is as follows: # struct PREG { OFFSET # char idStr[4] = "ABUM" 0x00 # uint version 0x04 # uint length 0x08 # uint checksum 0x0c # char last_booted_image 0x10 # char requested_boot_image 0x11 # char image_b_bootable <- not a typo 0x12 # char image_a_bootable 0x13 # uint boot_image_a_offset 0x14 # uint boot_image_b_offset 0x18 # uing recovery_image_offset 0x1c # } FOUND_PREG=0 if itest $DO_RAUC == 1; then env set PREG for PREG in 0x100000 0xf80000; do # check both the PREG and PREG-backup if itest $FOUND_PREG == 0; then sf read $kernel_addr_r $PREG 0x20 echo "PREG=$PREG data:" md.b $kernel_addr_r 0x20 setexpr PREG $PREG + 0x10 sf read $kernel_addr_r $PREG 1 setexpr.b LAST_BOOTED_IMAGE *${kernel_addr_r} if itest $LAST_BOOTED_IMAGE == 0; then # IMAGE A echo "last booted image = A (PREG=$PREG)" setexpr PREG $PREG + 4 # IMAGE A offset sf read $kernel_addr_r $PREG 4 setexpr.l IMAGE_OFFSET *${kernel_addr_r} echo "A image offset: $IMAGE_OFFSET" setexpr.l IMAGE_VERSION $IMAGE_OFFSET + 0x70 sf read $kernel_addr_r $IMAGE_VERSION 9 FOUND_PREG=1 else if itest $LAST_BOOTED_IMAGE == 1; then # IMAGE B echo "last booted image = B (PREG=$PREG)" setexpr PREG $PREG + 8 # IMAGE B offset sf read $kernel_addr_r $PREG 4 setexpr.l IMAGE_OFFSET *${kernel_addr_r} echo "B image offset: $IMAGE_OFFSET" setexpr.l IMAGE_VERSION $IMAGE_OFFSET + 0x70 sf read $kernel_addr_r $IMAGE_VERSION 9 FOUND_PREG=1 else echo "PREG=$PREG invalid" fi fi fi done fi if itest $FOUND_PREG == 1; then echo "Persistent Register data found/used" DO_RAUC=1 else echo "Persistent Register data NOT found/used" DO_RAUC=0 fi # at this point the 9 bytes in *${kernel_addr_r} is the version of the active boot.bin # and *${kernel_addr_r} + 0x20 contains the compare-to string (CMP2) if itest $DO_RAUC == 1; then echo "boot.bin version:" md.b $kernel_addr_r 9 echo "compare-to string:" md.b $CMP2 9 cmp.b $kernel_addr_r $CMP2 9 if itest $? == 0; then echo "*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*" echo "* boot.bin version good *" echo "*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*" DO_RAUC=1 else echo "*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*" echo "* !!! older boot.bin detected !!! *" echo "* !!! rauc will not be performed !!! *" echo "* falling back to booting the first partition *" echo "*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*" fi else echo "*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*" echo "* not performing RAUC *" echo "*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*" fi if itest $DO_RAUC == 1; then # A/B support test -n "${BOOT_ORDER}" || env set BOOT_ORDER "A B" test -n "${BOOT_A_LEFT}" || env set BOOT_A_LEFT 3 test -n "${BOOT_B_LEFT}" || env set BOOT_B_LEFT 3 test -n "${RAUC_BOOTDEV}" || env set RAUC_BOOTDEV "mmc 0:1" # determine rauc slot env set RAUC_BOOTPART env set RAUC_SLOT for RAUC_BOOT_SLOT in "${BOOT_ORDER}"; do if test "x${RAUC_BOOTPART}" != "x"; then # skip remaining slots elif test "x${RAUC_BOOT_SLOT}" = "xA"; then if test ${BOOT_A_LEFT} -gt 0; then echo "using RAUC slot A" setexpr BOOT_A_LEFT ${BOOT_A_LEFT} - 1 env set RAUC_SLOT "A" env set RAUC_BOOTPART "PARTLABEL=rootfsA" env set RAUC_BOOTDEV "mmc 0:1" fi elif test "x${RAUC_BOOT_SLOT}" = "xB"; then if test ${BOOT_B_LEFT} -gt 0; then echo "using RAUC slot B" setexpr BOOT_B_LEFT ${BOOT_B_LEFT} - 1 env set RAUC_SLOT "B" env set RAUC_BOOTPART "PARTLABEL=rootfsB" env set RAUC_BOOTDEV "mmc 0:2" fi fi done if test -n "${RAUC_BOOTPART}"; then env set bootargs "earlycon console=ttyPS0,115200 clk_ignore_unused rw init_fatal_sh=1 uio_pdrv_genirq.of_id=generic-uio rootwait root=${RAUC_BOOTPART} rauc.slot=${RAUC_SLOT}" env save else echo "no valid RAUC slot found, resetting tries to 3" env set BOOT_A_LEFT 3 env set BOOT_B_LEFT 3 env save reset fi else env set RAUC_BOOTDEV "mmc 0:1" env set bootargs "earlycon console=ttyPS0,115200 clk_ignore_unused rw init_fatal_sh=1 uio_pdrv_genirq.of_id=generic-uio rootwait root=/dev/mmcblk0p1" fi # reset kernel_addr_r env set kernel_addr_r $saved_kernel_addr_r if test -e ${RAUC_BOOTDEV} ${fitimage_name}; then echo "booting fitimage ${fitimage_name} from ${RAUC_BOOTDEV} at 0x10000000" ext4load ${RAUC_BOOTDEV} 0x10000000 ${fitimage_name}; bootm 0x10000000; fi if test -e ${RAUC_BOOTDEV} ${kernel_name}; then echo "loading kernel ${kernel_name} from ${RAUC_BOOTDEV} to 0x00200000" ext4load ${RAUC_BOOTDEV} 0x00200000 ${kernel_name}; fi if test -e ${RAUC_BOOTDEV} ${dtb_name}; then echo "loading devicetree ${dtb_name} from ${RAUC_BOOTDEV} to 0x00100000" ext4load ${RAUC_BOOTDEV} 0x00100000 ${dtb_name}; fi echo "booting booti" booti 0x00200000 - 0x00100000 fi done