snlavaiseandClaude Sonnet 5
afce23df9a
Custom bootcmd/bootargs for the Motorola Edge 40 Pro (rtwo, SM8550). The Motorola ABL loads this U-Boot as its "kernel" and always fills /chosen/linux,initrd-start with the RAM address of whatever it loaded as "ramdisk" (standard Android/GKI boot protocol). We package a FIT image (mainline pmOS kernel + dtb + initramfs) as that ramdisk, so bootcmd reads $prevbl_initrd_start_addr (populated by CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR from that same DT property) and does `bootm` on it, with a menu/bootefi fallback if the FIT boot fails. Part of the rtwo bring-up: see project notes rtwo-uboot-chainload for the full mechanism and why this replaced booting the mainline kernel directly from the Motorola ABL. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_015ADQrjdgE8awSA7TSaGgfr
58 lines
2.7 KiB
Bash
58 lines
2.7 KiB
Bash
bootdelay=0
|
|
bootretry=1
|
|
stdin=serial,button-kbd
|
|
stdout=serial,vidconsole
|
|
stderr=serial,vidconsole
|
|
|
|
# Fastboot is keen to use the address from kconfig, but we
|
|
# allocate its buffer at runtime.
|
|
fastboot=fastboot -l $fastboot_addr_r usb 0
|
|
|
|
# Always probe for UFS storage, though it should be done by board code.
|
|
preboot=scsi scan
|
|
|
|
# Shortcut to enable USB serial gadget and disable bootretry
|
|
serial_gadget=setenv stdin serial,button-kbd,usbacm; \
|
|
setenv stdout serial,vidconsole,usbacm; \
|
|
setenv stderr serial,vidconsole,usbacm; \
|
|
setenv bootretry -1; \
|
|
echo Enabled U-Boot console serial gadget
|
|
|
|
# bootretry will run this command over and over, if we fail once
|
|
# then bail out to the boot menu instead (with a pause to read
|
|
# the error message)
|
|
#
|
|
# rtwo (Motorola Edge 40 Pro, SM8550): the ABL loads the FIT image
|
|
# (mainline Image + dtb + initramfs) into the ramdisk slot of the
|
|
# Android boot.img. The ABL writes that address into
|
|
# /chosen/linux,initrd-start of the fdt it hands us, and U-Boot saves
|
|
# it as $prevbl_initrd_start_addr (CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR).
|
|
# Try that first; only fall back to the phone menu if it fails.
|
|
pmos_bootargs=earlycon console=ttyMSM0,115200n8 panic=5 pmos.debug-shell clk_ignore_unused pd_ignore_unused regulator_ignore_unused allow_mismatched_32bit_el0 pmos_boot_uuid=d4373976-057c-4cf3-a43d-00734001b405 pmos_root_uuid=09804032-85bb-4d57-95a5-00d1965fb10f pmos_rootfsopts=defaults
|
|
bootcmd=setenv bootargs $pmos_bootargs; echo pmOS: booting FIT at prevbl_initrd_start_addr=$prevbl_initrd_start_addr; bootm $prevbl_initrd_start_addr; echo pmOS: bootm failed; bootefi bootmgr; pause; run menucmd
|
|
|
|
# When entering the menu (either from button press or failed boot)
|
|
# remap bootcmd so it will re-open the menu and we won't get stuck
|
|
# at the console with no way to type
|
|
menucmd=setenv bootcmd run menucmd; bootmenu -1
|
|
|
|
# Pause is used so the output can be read on the display
|
|
bootmenu_0=Boot pmOS mainline (FIT)=setenv bootargs $pmos_bootargs; bootm $prevbl_initrd_start_addr; pause
|
|
bootmenu_1=Boot=bootefi bootmgr; pause
|
|
bootmenu_2=Enable serial console gadget=run serial_gadget
|
|
bootmenu_3=Enable USB mass storage=echo "Press any key to exit UMS mode"; ums 0 scsi 0
|
|
bootmenu_4=Enable fastboot mode=echo "Press any key to exit fastboot mode"; run fastboot
|
|
# Disabling bootretry means we'll just drop the shell
|
|
bootmenu_5=Drop to shell=setenv bootretry -1
|
|
bootmenu_6=Reset device=reset
|
|
bootmenu_7=Dump clocks=clk dump; pause
|
|
bootmenu_8=Dump environment=printenv; pause
|
|
bootmenu_9=Board info=bdinfo; pause
|
|
bootmenu_10=Dump bootargs=fdt addr $fdt_addr_r; fdt print /chosen bootargs; pause
|
|
bootmenu_11=Power off=poweroff
|
|
|
|
# Allow holding the volume down button while U-Boot loads to enter
|
|
# the boot menu
|
|
button_cmd_0_name=Volume Down
|
|
button_cmd_0=run menucmd
|