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https://github.com/smaeul/u-boot.git
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3db0989e68
In case of Android boot, reboot reason can be written into BCB (usually it's an area in 'misc' partition). U-Boot then can obtain that reboot reason from BCB and handle it accordingly to achieve correct Android boot flow, like it was suggested in [1]: - if it's empty: perform normal Android boot from eMMC - if it contains "bootonce-bootloader": get into fastboot mode - if it contains "boot-recovery": perform recovery boot The latter is not implemented yet, as it depends on some features that are not implemented on TI platforms yet (in AOSP and in U-Boot). [1] https://marc.info/?l=u-boot&m=152508418909737&w=2 Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
220 lines
6.8 KiB
C
220 lines
6.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Boot related environment variable definitions on TI boards.
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*
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* (C) Copyright 2017 Linaro Ltd.
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* Sam Protsenko <semen.protsenko@linaro.org>
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*/
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#ifndef __TI_BOOT_H
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#define __TI_BOOT_H
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#ifndef CONSOLEDEV
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#define CONSOLEDEV "ttyS2"
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#endif
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#define VBMETA_PART_SIZE (64 * 1024)
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#if defined(CONFIG_LIBAVB)
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#define VBMETA_PART \
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"name=vbmeta,size=" __stringify(VBMETA_PART_SIZE) \
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",uuid=${uuid_gpt_vbmeta};"
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#else
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#define VBMETA_PART ""
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#endif
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#if defined(CONFIG_CMD_AB_SELECT)
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#define COMMON_PARTS \
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"name=boot_a,size=20M,uuid=${uuid_gpt_boot_a};" \
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"name=boot_b,size=20M,uuid=${uuid_gpt_boot_b};" \
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"name=system_a,size=1024M,uuid=${uuid_gpt_system_a};" \
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"name=system_b,size=1024M,uuid=${uuid_gpt_system_b};"
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#else
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#define COMMON_PARTS \
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"name=boot,size=20M,uuid=${uuid_gpt_boot};" \
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"name=system,size=1024M,uuid=${uuid_gpt_system};"
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#endif
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#ifndef PARTS_DEFAULT
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/* Define the default GPT table for eMMC */
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#define PARTS_DEFAULT \
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/* Linux partitions */ \
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"uuid_disk=${uuid_gpt_disk};" \
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"name=bootloader,start=384K,size=1792K,uuid=${uuid_gpt_bootloader};" \
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"name=rootfs,start=2688K,size=-,uuid=${uuid_gpt_rootfs}\0" \
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/* Android partitions */ \
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"partitions_android=" \
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"uuid_disk=${uuid_gpt_disk};" \
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"name=xloader,start=128K,size=256K,uuid=${uuid_gpt_xloader};" \
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"name=bootloader,size=2048K,uuid=${uuid_gpt_bootloader};" \
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"name=uboot-env,start=2432K,size=256K,uuid=${uuid_gpt_reserved};" \
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"name=misc,size=128K,uuid=${uuid_gpt_misc};" \
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"name=recovery,size=40M,uuid=${uuid_gpt_recovery};" \
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COMMON_PARTS \
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"name=vendor,size=256M,uuid=${uuid_gpt_vendor};" \
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VBMETA_PART \
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"name=userdata,size=-,uuid=${uuid_gpt_userdata}"
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#endif /* PARTS_DEFAULT */
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#if defined(CONFIG_CMD_AVB)
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#define AVB_VERIFY_CHECK "if run avb_verify; then " \
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"echo AVB verification OK.;" \
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"set bootargs $bootargs $avb_bootargs;" \
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"else " \
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"echo AVB verification failed.;" \
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"exit; fi;"
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#define AVB_VERIFY_CMD "avb_verify=avb init 1; avb verify;\0"
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#else
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#define AVB_VERIFY_CHECK ""
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#define AVB_VERIFY_CMD ""
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#endif
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#define CONTROL_PARTITION "misc"
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#if defined(CONFIG_CMD_AB_SELECT)
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#define AB_SELECT \
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"if part number mmc 1 " CONTROL_PARTITION " control_part_number; " \
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"then " \
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"echo " CONTROL_PARTITION \
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" partition number:${control_part_number};" \
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"ab_select slot_name mmc ${mmcdev}:${control_part_number};" \
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"else " \
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"echo " CONTROL_PARTITION " partition not found;" \
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"exit;" \
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"fi;" \
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"setenv slot_suffix _${slot_name};" \
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"if part number mmc ${mmcdev} system${slot_suffix} " \
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"system_part_number; then " \
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"setenv bootargs_ab " \
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"ro root=/dev/mmcblk${mmcdev}p${system_part_number} " \
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"rootwait init=/init skip_initramfs " \
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"androidboot.slot_suffix=${slot_suffix};" \
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"echo A/B cmdline addition: ${bootargs_ab};" \
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"setenv bootargs ${bootargs} ${bootargs_ab};" \
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"else " \
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"echo system${slot_suffix} partition not found;" \
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"fi;"
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#else
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#define AB_SELECT ""
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#endif
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#define FASTBOOT_CMD \
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"echo Booting into fastboot ...; " \
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"fastboot " __stringify(CONFIG_FASTBOOT_USB_DEV) "; "
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#define DEFAULT_COMMON_BOOT_TI_ARGS \
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"console=" CONSOLEDEV ",115200n8\0" \
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"fdtfile=undefined\0" \
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"bootpart=0:2\0" \
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"bootdir=/boot\0" \
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"bootfile=zImage\0" \
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"usbtty=cdc_acm\0" \
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"vram=16M\0" \
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AVB_VERIFY_CMD \
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"partitions=" PARTS_DEFAULT "\0" \
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"optargs=\0" \
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"dofastboot=0\0" \
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"emmc_linux_boot=" \
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"echo Trying to boot Linux from eMMC ...; " \
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"setenv mmcdev 1; " \
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"setenv bootpart 1:2; " \
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"setenv mmcroot /dev/mmcblk0p2 rw; " \
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"run mmcboot;\0" \
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"emmc_android_boot=" \
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"if bcb load " __stringify(CONFIG_FASTBOOT_FLASH_MMC_DEV) " " \
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CONTROL_PARTITION "; then " \
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"if bcb test command = bootonce-bootloader; then " \
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"echo BCB: Bootloader boot...; " \
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"bcb clear command; bcb store; " \
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FASTBOOT_CMD \
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"elif bcb test command = boot-recovery; then " \
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"echo BCB: Recovery boot...; " \
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"echo Warning: recovery is not implemented; " \
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"echo Performing normal boot for now...; " \
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"bcb clear command; bcb store; " \
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"run emmc_android_normal_boot; " \
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"else " \
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"echo BCB: Normal boot requested...; " \
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"run emmc_android_normal_boot; " \
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"fi; " \
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"else " \
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"echo Warning: BCB is corrupted or does not exist; " \
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"echo Performing normal boot...; " \
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"run emmc_android_normal_boot; " \
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"fi;\0" \
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"emmc_android_normal_boot=" \
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"echo Trying to boot Android from eMMC ...; " \
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"run update_to_fit; " \
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"setenv eval_bootargs setenv bootargs $bootargs; " \
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"run eval_bootargs; " \
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"setenv mmcdev 1; " \
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"setenv machid fe6; " \
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"mmc dev $mmcdev; " \
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"mmc rescan; " \
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AVB_VERIFY_CHECK \
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AB_SELECT \
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"if part start mmc ${mmcdev} boot${slot_suffix} boot_start; " \
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"then " \
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"part size mmc ${mmcdev} boot${slot_suffix} " \
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"boot_size; " \
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"mmc read ${loadaddr} ${boot_start} ${boot_size}; " \
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"bootm ${loadaddr}#${fdtfile}; " \
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"else " \
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"echo boot${slot_suffix} partition not found; " \
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"fi;\0"
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#ifdef CONFIG_OMAP54XX
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#define DEFAULT_FDT_TI_ARGS \
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"findfdt="\
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"if test $board_name = omap5_uevm; then " \
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"setenv fdtfile omap5-uevm.dtb; fi; " \
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"if test $board_name = dra7xx; then " \
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"setenv fdtfile dra7-evm.dtb; fi;" \
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"if test $board_name = dra72x-revc; then " \
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"setenv fdtfile dra72-evm-revc.dtb; fi;" \
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"if test $board_name = dra72x; then " \
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"setenv fdtfile dra72-evm.dtb; fi;" \
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"if test $board_name = dra71x; then " \
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"setenv fdtfile dra71-evm.dtb; fi;" \
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"if test $board_name = dra76x_acd; then " \
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"setenv fdtfile dra76-evm.dtb; fi;" \
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"if test $board_name = beagle_x15; then " \
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"setenv fdtfile am57xx-beagle-x15.dtb; fi;" \
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"if test $board_name = beagle_x15_revb1; then " \
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"setenv fdtfile am57xx-beagle-x15-revb1.dtb; fi;" \
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"if test $board_name = beagle_x15_revc; then " \
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"setenv fdtfile am57xx-beagle-x15-revc.dtb; fi;" \
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"if test $board_name = am572x_idk; then " \
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"setenv fdtfile am572x-idk.dtb; fi;" \
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"if test $board_name = am574x_idk; then " \
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"setenv fdtfile am574x-idk.dtb; fi;" \
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"if test $board_name = am57xx_evm; then " \
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"setenv fdtfile am57xx-beagle-x15.dtb; fi;" \
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"if test $board_name = am57xx_evm_reva3; then " \
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"setenv fdtfile am57xx-beagle-x15.dtb; fi;" \
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"if test $board_name = am571x_idk; then " \
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"setenv fdtfile am571x-idk.dtb; fi;" \
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"if test $fdtfile = undefined; then " \
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"echo WARNING: Could not determine device tree to use; fi; \0"
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#define CONFIG_BOOTCOMMAND \
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"if test ${dofastboot} -eq 1; then " \
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"echo Boot fastboot requested, resetting dofastboot ...;" \
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"setenv dofastboot 0; saveenv;" \
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FASTBOOT_CMD \
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"fi;" \
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"if test ${boot_fit} -eq 1; then " \
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"run update_to_fit;" \
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"fi;" \
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"run findfdt; " \
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"run envboot; " \
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"run mmcboot;" \
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"run emmc_linux_boot; " \
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"run emmc_android_boot; " \
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""
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#endif /* CONFIG_OMAP54XX */
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#endif /* __TI_BOOT_H */
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