[PATCH 0/3] save prev bootloader data, when u-boot chainloaded
From: Dzmitry Sankouski dsankouski@gmail.com
When u-boot is used as a chain-loaded bootloader (replacing OS kernel), previous bootloader leaves data in RAM, that can be reused.
For example, on recent arm linux system, when chainloading u-boot, there are initramfs and fdt in RAM prepared for OS booting. Initramfs may be modified to store u-boot's payload, thus providing the ability to use chainloaded u-boot to boot OS without any storage support.
Two config options added: - SAVE_PREV_BL_INITRAMFS_START_ADDR saves initramfs start address to 'prevbl_initrd_start_addr' environment variable - SAVE_PREV_BL_FDT_ADDR saves fdt address to 'prevbl_fdt_addr' environment variable
This feature will be used for axy17lte and starqltechn boards for now, and more phones in future.
Dzmitry Sankouski (3): arm: init: save previous bootloader data board: starqltechn: get board usable - add bootcmd and docs board: axy17lte: get board usable - add bootcmd and docs
arch/arm/lib/Makefile | 2 + arch/arm/lib/save_prev_bl_data.c | 93 +++++++++++++++++++++++++++++ boot/Kconfig | 79 +++++++++++++++--------- configs/a3y17lte_defconfig | 11 ++-- configs/a5y17lte_defconfig | 10 ++-- configs/a7y17lte_defconfig | 10 ++-- configs/starqltechn_defconfig | 12 ++-- doc/board/qualcomm/sdm845.rst | 47 ++++++++++++++- doc/board/samsung/axy17lte.rst | 15 +---- include/configs/exynos78x0-common.h | 1 + include/configs/sdm845.h | 5 ++ include/init.h | 13 ++++ 12 files changed, 241 insertions(+), 57 deletions(-) create mode 100644 arch/arm/lib/save_prev_bl_data.c
From: Dzmitry Sankouski dsankouski@gmail.com
When u-boot is used as a chain-loaded bootloader (replacing OS kernel), previous bootloader leaves data in RAM, that can be reused.
For example, on recent arm linux system, when chainloading u-boot, there are initramfs and fdt in RAM prepared for OS booting. Initramfs may be modified to store u-boot's payload, thus providing the ability to use chainloaded u-boot to boot OS without any storage support.
Two config options added: - SAVE_PREV_BL_INITRAMFS_START_ADDR saves initramfs start address to 'prevbl_initrd_start_addr' environment variable - SAVE_PREV_BL_FDT_ADDR saves fdt address to 'prevbl_fdt_addr' environment variable
Signed-off-by: sankouski-dzmitry sankouski.dzmitry@gmail.com Cc: Tom Rini trini@konsulko.com --- arch/arm/lib/Makefile | 2 + arch/arm/lib/save_prev_bl_data.c | 93 ++++++++++++++++++++++++++++++++ boot/Kconfig | 79 +++++++++++++++++---------- include/init.h | 13 +++++ 4 files changed, 160 insertions(+), 27 deletions(-) create mode 100644 arch/arm/lib/save_prev_bl_data.c
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile index c48e1f622d..aacd2253da 100644 --- a/arch/arm/lib/Makefile +++ b/arch/arm/lib/Makefile @@ -48,6 +48,8 @@ obj-$(CONFIG_$(SPL_TPL_)USE_ARCH_MEMCPY) += memcpy.o endif obj-$(CONFIG_SEMIHOSTING) += semihosting.o
+obj-$(filter y, $(CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR) $(CONFIG_SAVE_PREV_BL_FDT_ADDR)) += save_prev_bl_data.o +# obj-$(CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR) += save_prev_bl_data.o obj-y += bdinfo.o obj-y += sections.o CFLAGS_REMOVE_sections.o := $(LTO_CFLAGS) diff --git a/arch/arm/lib/save_prev_bl_data.c b/arch/arm/lib/save_prev_bl_data.c new file mode 100644 index 0000000000..2f88874484 --- /dev/null +++ b/arch/arm/lib/save_prev_bl_data.c @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * save_prev_bl_data - saving previous bootloader data + * to environment variables. + * + * Copyright (c) 2022 Dzmitry Sankouski (dsankouski@gmail.com) + */ +#include <init.h> +#include <env.h> +#include <fdtdec.h> +#include <fdt_support.h> +#include <fdt.h> +#include <common.h> +#include <linux/errno.h> +#include <asm/system.h> +#include <asm/armv8/mmu.h> + +static ulong reg0 __section(".data"); + +/** + * Save x0 register value, assuming previous bootloader set it to + * point on loaded fdt or (for older linux kernels)atags. + */ +void save_boot_params(ulong r0) +{ + reg0 = r0; + save_boot_params_ret(); +} + +bool is_addr_accessible(phys_addr_t addr) +{ + struct mm_region *mem = mem_map; + phys_addr_t bank_start; + phys_addr_t bank_end; + + while (mem->size) { + bank_start = mem->phys; + bank_end = bank_start + mem->size; + debug("check if block %pap - %pap includes %pap\n", &bank_start, &bank_end, &addr); + if (addr > bank_start && addr < bank_end) + return true; + mem++; + } + + return false; +} + +int save_prev_bl_data(void) +{ + struct fdt_header *fdt_blob; + int node; + u64 initrd_start_prop; + + if (!is_addr_accessible((phys_addr_t)reg0)) + return -ENODATA; + + fdt_blob = (struct fdt_header *)reg0; + if (!fdt_valid(&fdt_blob)) { + pr_warn("%s: address 0x%lx is not a valid fdt\n", __func__, reg0); + return -ENODATA; + } + + #if defined(CONFIG_SAVE_PREV_BL_FDT_ADDR) + env_set_addr("prevbl_fdt_addr", (void *)reg0); + #endif + #if !defined(CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR) + return 0; + #endif + + node = fdt_path_offset(fdt_blob, "/chosen"); + if (!node) { + pr_warn("%s: chosen node not found in device tree at addr: 0x%lx\n", + __func__, reg0); + return -ENODATA; + } + /* + * linux,initrd-start property might be either 64 or 32 bit, + * depending on primary bootloader implementation. + */ + initrd_start_prop = fdtdec_get_uint64(fdt_blob, node, "linux,initrd-start", 0); + if (!initrd_start_prop) { + debug("%s: attempt to get uint64 linux,initrd-start property failed, trying uint\n", + __func__); + initrd_start_prop = fdtdec_get_uint(fdt_blob, node, "linux,initrd-start", 0); + if (!initrd_start_prop) { + debug("%s: attempt to get uint failed, too\n", __func__); + return -ENODATA; + } + } + env_set_addr("prevbl_initrd_start_addr", (void *)initrd_start_prop); + + return 0; +} diff --git a/boot/Kconfig b/boot/Kconfig index c8d5906cd3..da2f0797e0 100644 --- a/boot/Kconfig +++ b/boot/Kconfig @@ -135,10 +135,10 @@ config FIT_IMAGE_POST_PROCESS processed before being added to the FIT image).
config FIT_PRINT - bool "Support FIT printing" - default y - help - Support printing the content of the fitImage in a verbose manner. + bool "Support FIT printing" + default y + help + Support printing the content of the fitImage in a verbose manner.
if SPL
@@ -207,12 +207,12 @@ config SPL_LOAD_FIT This path has the following limitations:
1. "loadables" images, other than FDTs, which do not have a "load" - property will not be loaded. This limitation also applies to FPGA - images with the correct "compatible" string. + property will not be loaded. This limitation also applies to FPGA + images with the correct "compatible" string. 2. For FPGA images, only the "compatible" = "u-boot,fpga-legacy" - loading method is supported. + loading method is supported. 3. FDTs are only loaded for images with an "os" property of "u-boot". - "linux" images are also supported with Falcon boot mode. + "linux" images are also supported with Falcon boot mode.
config SPL_LOAD_FIT_ADDRESS hex "load address of fit image" @@ -345,8 +345,8 @@ config SYS_EXTRA_OPTIONS The old configuration infrastructure (= mkconfig + boards.cfg) provided the extra options field. If you have something like "HAS_BAR,BAZ=64", the optional options - #define CONFIG_HAS - #define CONFIG_BAZ 64 + #define CONFIG_HAS + #define CONFIG_BAZ 64 will be defined in include/config.h. This option was prepared for the smooth migration from the old configuration to Kconfig. Since this option will be removed sometime, @@ -380,7 +380,7 @@ config SYS_CLK_FREQ int "CPU clock frequency" default 125000000 if ARCH_LS1012A default 100000000 if ARCH_P2020 || ARCH_T1024 || ARCH_T1042 || \ - ARCH_LS1021A || FSL_LSCH2 || FSL_LSCH3 + ARCH_LS1021A || FSL_LSCH2 || FSL_LSCH3 default 66666666 if ARCH_P1010 || ARCH_P1020 || ARCH_T4240 default 66660000 if ARCH_T2080 default 33333333 if RCAR_GEN3 @@ -485,15 +485,15 @@ config BOOTSTAGE_REPORT boot process. The report looks something like this:
Timer summary in microseconds: - Mark Elapsed Stage - 0 0 reset + Mark Elapsed Stage + 0 0 reset 3,575,678 3,575,678 board_init_f start - 3,575,695 17 arch_cpu_init A9 - 3,575,777 82 arch_cpu_init done - 3,659,598 83,821 board_init_r start - 3,910,375 250,777 main_loop + 3,575,695 17 arch_cpu_init A9 + 3,575,777 82 arch_cpu_init done + 3,659,598 83,821 board_init_r start + 3,910,375 250,777 main_loop 29,916,167 26,005,792 bootm_start - 30,361,327 445,160 start_kernel + 30,361,327 445,160 start_kernel
config BOOTSTAGE_RECORD_COUNT int "Number of boot stage records to store" @@ -580,24 +580,24 @@ config SHOW_BOOT_PROGRESS Legacy uImage format:
Arg Where When - 1 common/cmd_bootm.c before attempting to boot an image + 1 common/cmd_bootm.c before attempting to boot an image -1 common/cmd_bootm.c Image header has bad magic number - 2 common/cmd_bootm.c Image header has correct magic number + 2 common/cmd_bootm.c Image header has correct magic number -2 common/cmd_bootm.c Image header has bad checksum - 3 common/cmd_bootm.c Image header has correct checksum + 3 common/cmd_bootm.c Image header has correct checksum -3 common/cmd_bootm.c Image data has bad checksum - 4 common/cmd_bootm.c Image data has correct checksum + 4 common/cmd_bootm.c Image data has correct checksum -4 common/cmd_bootm.c Image is for unsupported architecture - 5 common/cmd_bootm.c Architecture check OK + 5 common/cmd_bootm.c Architecture check OK -5 common/cmd_bootm.c Wrong Image Type (not kernel, multi) - 6 common/cmd_bootm.c Image Type check OK + 6 common/cmd_bootm.c Image Type check OK -6 common/cmd_bootm.c gunzip uncompression error -7 common/cmd_bootm.c Unimplemented compression type - 7 common/cmd_bootm.c Uncompression OK - 8 common/cmd_bootm.c No uncompress/copy overwrite error + 7 common/cmd_bootm.c Uncompression OK + 8 common/cmd_bootm.c No uncompress/copy overwrite error -9 common/cmd_bootm.c Unsupported OS (not Linux, BSD, VxWorks, QNX)
- 9 common/image.c Start initial ramdisk verification + 9 common/image.c Start initial ramdisk verification -10 common/image.c Ramdisk header has bad magic number -11 common/image.c Ramdisk header has bad checksum 10 common/image.c Ramdisk header is OK @@ -1067,4 +1067,29 @@ config DEFAULT_FDT_FILE help This option is used to set the default fdt file to boot OS.
+config SAVE_PREV_BL_FDT_ADDR + depends on ARM + bool "Saves fdt address, passed by the previous bootloader, to env var" + default n + help + When u-boot is used as a chain-loaded bootloader (replacing OS kernel), + enable this option to save fdt address, passed by the + previous bootloader for future use. + Address is saved to `prevbl_fdt_addr` environment variable. + + If no fdt was provided by previous bootloader, no env variables + will be created. + +config SAVE_PREV_BL_INITRAMFS_START_ADDR + depends on ARM + bool "Saves initramfs address, passed by the previous bootloader, to env var" + default n + help + When u-boot is used as a chain-loaded bootloader(replacing OS kernel), + enable this option to save initramfs address, passed by the + previous bootloader for future use. + Address is saved to `prevbl_initrd_start_addr` environment variable. + + If no initramfs was provided by previous bootloader, no env variables + will be created. endmenu # Booting diff --git a/include/init.h b/include/init.h index 20c3976af0..1a55a0e2e4 100644 --- a/include/init.h +++ b/include/init.h @@ -166,6 +166,19 @@ int arch_setup_bdinfo(void); */ int setup_bdinfo(void);
+#if defined(CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR) || \ +defined(CONFIG_SAVE_PREV_BL_FDT_ADDR) +/** + * save_prev_bl_data - Save prev bl data in env vars. + * + * When u-boot is chain-loaded, save previous bootloader data, + * like initramfs address to environment variables. + * + * Return: 0 if ok; -ENODATA on error + */ +int save_prev_bl_data(void); +#endif + /** * cpu_secondary_init_r() - CPU-specific secondary initialization *
From: Dzmitry Sankouski dsankouski@gmail.com
U-boot is intended to replace linux kernel in android boot image(ABL), and it's FIT payload to replace initramfs file. The boot process is similar to boot image with linux: - android bootloader (ABL) unpacks android boot image - ABL sets `linux,initrd-start property` in chosen node in unpacked FDT - ABL sets x0 register to FDT address, and passes control to u-boot - u-boot reads x0 register, and stores it in `prevbl_fdt_addr` env variable - u-boot reads `linux,initrd-start` property, and stores it in `prevbl_initrd_start_addr`
In this way, u-boot bootcmd relies on `prevbl_initrd_start_addr` env variable, and boils down to `bootm $prevbl_initrd_start_addr`. If more control on boot process is desired, pack a boot script in FIT image, and put it to default configuration
What done: - strip unneeded config options - add FIT image support - increase LMB_MAX_REGIONS, to store all linux dtb reserved memory regions - add linux kernel image header
Uart driver causes hang, when u-boot is used in android boot image instead of linux. Temporary disable console driver, until investigated and fixed.
Signed-off-by: sankouski-dzmitry sankouski.dzmitry@gmail.com Cc: Ramon Fried rfried.dev@gmail.com --- configs/starqltechn_defconfig | 12 ++++++--- doc/board/qualcomm/sdm845.rst | 47 ++++++++++++++++++++++++++++++++++- include/configs/sdm845.h | 5 ++++ 3 files changed, 59 insertions(+), 5 deletions(-)
diff --git a/configs/starqltechn_defconfig b/configs/starqltechn_defconfig index f57bb859cc..48b16c1da5 100644 --- a/configs/starqltechn_defconfig +++ b/configs/starqltechn_defconfig @@ -2,13 +2,14 @@ CONFIG_ARM=y CONFIG_SKIP_LOWLEVEL_INIT=y CONFIG_POSITION_INDEPENDENT=y CONFIG_ARCH_SNAPDRAGON=y -CONFIG_SYS_TEXT_BASE=0x80000000 -CONFIG_SYS_MALLOC_LEN=0x81f000 CONFIG_DEFAULT_DEVICE_TREE="starqltechn" +CONFIG_BOOTDELAY=0 +CONFIG_FIT=y +CONFIG_FIT_VERBOSE=y CONFIG_TARGET_STARQLTECHN=y CONFIG_IDENT_STRING="\nSamsung S9 SM-G9600" CONFIG_SYS_LOAD_ADDR=0x80000000 -CONFIG_USE_PREBOOT=y +CONFIG_LMB_MAX_REGIONS=64 # CONFIG_DISPLAY_CPUINFO is not set CONFIG_HUSH_PARSER=y CONFIG_CMD_GPIO=y @@ -20,5 +21,8 @@ CONFIG_PM8916_GPIO=y CONFIG_PINCTRL=y CONFIG_DM_PMIC=y CONFIG_PMIC_PM8916=y -CONFIG_MSM_GENI_SERIAL=y +CONFIG_REQUIRE_SERIAL_CONSOLE=n +CONFIG_MSM_GENI_SERIAL=n CONFIG_SPMI_MSM=y +CONFIG_LINUX_KERNEL_IMAGE_HEADER=y +CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR=y diff --git a/doc/board/qualcomm/sdm845.rst b/doc/board/qualcomm/sdm845.rst index cd46cbe9cf..b00a30a313 100644 --- a/doc/board/qualcomm/sdm845.rst +++ b/doc/board/qualcomm/sdm845.rst @@ -17,7 +17,9 @@ It is loaded as an Android boot image through ABL
Installation ------------ -First, setup ``CROSS_COMPILE`` for aarch64. Then, build U-Boot for your board:: +Build +^^^^^^^^^^^^^^^^^^^^^^^^ +Setup ``CROSS_COMPILE`` for aarch64 and build U-Boot for your board::
$ export CROSS_COMPILE=<aarch64 toolchain prefix> $ make <your board name here, see Boards section>_defconfig @@ -25,6 +27,49 @@ First, setup ``CROSS_COMPILE`` for aarch64. Then, build U-Boot for your board::
This will build ``u-boot.bin`` in the configured output directory.
+Generate FIT image +^^^^^^^^^^^^^^^^^^^^^^^^ +See doc/uImage.FIT for more details + +Pack android boot image +^^^^^^^^^^^^^^^^^^^^^^^^ +We'll assemble android boot image with ``u-boot.bin`` instead of linux kernel, +and FIT image instead of ``initramfs``. Android bootloader expect gzipped kernel +with appended dtb, so let's mimic linux to satisfy stock bootloader: + +- create dump dtb:: + + workdir=/tmp/prepare_payload + mkdir -p "$workdir" + cd "$workdir" + mock_dtb="$workdir"/payload_mock.dtb + + dtc -I dts -O dtb -o "$mock_dtb" << EOF + /dts-v1/; + / { + memory { + /* We expect the bootloader to fill in the size */ + reg = <0 0 0 0>; + }; + + chosen { }; + }; + EOF + +- gzip u-boot ``gzip u-boot.bin`` +- append dtb to gzipped u-boot: ``cat u-boot.bin.gz "$mock_dtb" > u-boot.bin.gz-dtb`` + +Now we've got everything to build android boot image::: + + mkbootimg --base 0x0 --kernel_offset 0x00008000 \ + --ramdisk_offset 0x02000000 --tags_offset 0x01e00000 \ + --pagesize 4096 --second_offset 0x00f00000 \ + --ramdisk "$fit_image" \ + --kernel u-boot.bin.gz-dtb \ + -o boot.img + +Flash image with your phone's flashing method. + Boards ------------ starqlte diff --git a/include/configs/sdm845.h b/include/configs/sdm845.h index af9ba197d4..398986bfcb 100644 --- a/include/configs/sdm845.h +++ b/include/configs/sdm845.h @@ -16,6 +16,11 @@ /* Generic Timer Definitions */ #define COUNTER_FREQUENCY 19000000
+#define CONFIG_EXTRA_ENV_SETTINGS \ + "bootm_size=0x4000000\0" \ + "bootcmd=bootm $prevbl_initrd_start_addr\0" \ + "bootm_low=0x80000000\0" + /* Size of malloc() pool */ #define CONFIG_SYS_BOOTM_LEN SZ_64M
From: Dzmitry Sankouski dsankouski@gmail.com
U-boot is intended to replace linux kernel in android boot image(ABL), and it's FIT payload to replace initramfs file. The boot process is similar to boot image with linux: - android bootloader (ABL) unpacks android boot image - ABL sets `linux,initrd-start property` in chosen node in unpacked FDT - ABL sets x0 register to FDT address, and passes control to u-boot - u-boot reads x0 register, and stores it in `prevbl_fdt_addr` env variable - u-boot reads `linux,initrd-start` property, and stores it in `prevbl_initrd_start_addr`
In this way, u-boot bootcmd relies on `prevbl_initrd_start_addr` env variable, and boils down to `bootm $prevbl_initrd_start_addr`. If more control on boot process is desired, pack a boot script in FIT image, and put it to default configuration
What done: - Rearrange defconfig option order - Add CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR option - Doc updates: - remove wrong SBOOT memory corruption note, because memory is changed during u-boot bringup process, not by SBOOT - put payload on ramdisk place in abl boot image creation step
Signed-off-by: sankouski-dzmitry sankouski.dzmitry@gmail.com Minkyu Kang mk7.kang@samsung.com --- configs/a3y17lte_defconfig | 11 ++++++----- configs/a5y17lte_defconfig | 10 ++++++---- configs/a7y17lte_defconfig | 10 ++++++---- doc/board/samsung/axy17lte.rst | 15 +++------------ include/configs/exynos78x0-common.h | 1 + 5 files changed, 22 insertions(+), 25 deletions(-)
diff --git a/configs/a3y17lte_defconfig b/configs/a3y17lte_defconfig index ddc1801a59..80a7f93325 100644 --- a/configs/a3y17lte_defconfig +++ b/configs/a3y17lte_defconfig @@ -1,13 +1,14 @@ CONFIG_ARM=y -CONFIG_SYS_CONFIG_NAME="exynos78x0-common" -CONFIG_SKIP_LOWLEVEL_INIT=y CONFIG_ARCH_EXYNOS=y -CONFIG_SYS_TEXT_BASE=0x40001000 CONFIG_ARCH_EXYNOS7=y CONFIG_TARGET_A3Y17LTE=y +CONFIG_SYS_CONFIG_NAME="exynos78x0-common" +CONFIG_SYS_TEXT_BASE=0x40001000 +CONFIG_SYS_LOAD_ADDR=0x40001000 +CONFIG_SKIP_LOWLEVEL_INIT=y CONFIG_NR_DRAM_BANKS=8 CONFIG_DEFAULT_DEVICE_TREE="exynos78x0-axy17lte" -CONFIG_SYS_LOAD_ADDR=0x40001000 +CONFIG_HUSH_PARSER=y CONFIG_FIT=y CONFIG_USE_PREBOOT=y CONFIG_PREBOOT="echo Read pressed buttons status;KEY_VOLUMEUP=gpa20;KEY_HOME=gpa17;KEY_VOLUMEDOWN=gpa21;KEY_POWER=gpa00;PRESSED=0;RELEASED=1;if gpio input $KEY_VOLUMEUP; then setenv VOLUME_UP $PRESSED; else setenv VOLUME_UP $RELEASED; fi;if gpio input $KEY_VOLUMEDOWN; then setenv VOLUME_DOWN $PRESSED; else setenv VOLUME_DOWN $RELEASED; fi;if gpio input $KEY_HOME; then setenv HOME $PRESSED; else setenv HOME $RELEASED; fi;if gpio input $KEY_POWER; then setenv POWER $PRESSED; else setenv POWER $RELEASED; fi;" @@ -16,4 +17,4 @@ CONFIG_HUSH_PARSER=y CONFIG_CMD_GPIO=y CONFIG_CMD_I2C=y CONFIG_DM_I2C_GPIO=y -CONFIG_PINCTRL_EXYNOS78x0=y +CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR=y diff --git a/configs/a5y17lte_defconfig b/configs/a5y17lte_defconfig index 2534ab0573..c7d4baf67b 100644 --- a/configs/a5y17lte_defconfig +++ b/configs/a5y17lte_defconfig @@ -1,13 +1,14 @@ CONFIG_ARM=y -CONFIG_SYS_CONFIG_NAME="exynos78x0-common" -CONFIG_SKIP_LOWLEVEL_INIT=y CONFIG_ARCH_EXYNOS=y -CONFIG_SYS_TEXT_BASE=0x40001000 CONFIG_ARCH_EXYNOS7=y CONFIG_TARGET_A5Y17LTE=y +CONFIG_SYS_CONFIG_NAME="exynos78x0-common" +CONFIG_SYS_TEXT_BASE=0x40001000 +CONFIG_SYS_LOAD_ADDR=0x40001000 +CONFIG_SKIP_LOWLEVEL_INIT=y CONFIG_NR_DRAM_BANKS=12 CONFIG_DEFAULT_DEVICE_TREE="exynos78x0-axy17lte" -CONFIG_SYS_LOAD_ADDR=0x40001000 +CONFIG_HUSH_PARSER=y CONFIG_FIT=y CONFIG_USE_PREBOOT=y CONFIG_PREBOOT="echo Read pressed buttons status;KEY_VOLUMEUP=gpa20;KEY_HOME=gpa17;KEY_VOLUMEDOWN=gpa21;KEY_POWER=gpa00;PRESSED=0;RELEASED=1;if gpio input $KEY_VOLUMEUP; then setenv VOLUME_UP $PRESSED; else setenv VOLUME_UP $RELEASED; fi;if gpio input $KEY_VOLUMEDOWN; then setenv VOLUME_DOWN $PRESSED; else setenv VOLUME_DOWN $RELEASED; fi;if gpio input $KEY_HOME; then setenv HOME $PRESSED; else setenv HOME $RELEASED; fi;if gpio input $KEY_POWER; then setenv POWER $PRESSED; else setenv POWER $RELEASED; fi;" @@ -16,3 +17,4 @@ CONFIG_HUSH_PARSER=y CONFIG_CMD_GPIO=y CONFIG_CMD_I2C=y CONFIG_DM_I2C_GPIO=y +CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR=y diff --git a/configs/a7y17lte_defconfig b/configs/a7y17lte_defconfig index a2d76377ab..20a7fb1a8b 100644 --- a/configs/a7y17lte_defconfig +++ b/configs/a7y17lte_defconfig @@ -1,13 +1,14 @@ CONFIG_ARM=y -CONFIG_SYS_CONFIG_NAME="exynos78x0-common" -CONFIG_SKIP_LOWLEVEL_INIT=y CONFIG_ARCH_EXYNOS=y -CONFIG_SYS_TEXT_BASE=0x40001000 CONFIG_ARCH_EXYNOS7=y CONFIG_TARGET_A7Y17LTE=y +CONFIG_SYS_CONFIG_NAME="exynos78x0-common" +CONFIG_SYS_TEXT_BASE=0x40001000 +CONFIG_SYS_LOAD_ADDR=0x40001000 +CONFIG_SKIP_LOWLEVEL_INIT=y CONFIG_NR_DRAM_BANKS=12 CONFIG_DEFAULT_DEVICE_TREE="exynos78x0-axy17lte" -CONFIG_SYS_LOAD_ADDR=0x40001000 +CONFIG_HUSH_PARSER=y CONFIG_FIT=y CONFIG_USE_PREBOOT=y CONFIG_PREBOOT="echo Read pressed buttons status;KEY_VOLUMEUP=gpa20;KEY_HOME=gpa17;KEY_VOLUMEDOWN=gpa21;KEY_POWER=gpa00;PRESSED=0;RELEASED=1;if gpio input $KEY_VOLUMEUP; then setenv VOLUME_UP $PRESSED; else setenv VOLUME_UP $RELEASED; fi;if gpio input $KEY_VOLUMEDOWN; then setenv VOLUME_DOWN $PRESSED; else setenv VOLUME_DOWN $RELEASED; fi;if gpio input $KEY_HOME; then setenv HOME $PRESSED; else setenv HOME $RELEASED; fi;if gpio input $KEY_POWER; then setenv POWER $PRESSED; else setenv POWER $RELEASED; fi;" @@ -16,3 +17,4 @@ CONFIG_HUSH_PARSER=y CONFIG_CMD_GPIO=y CONFIG_CMD_I2C=y CONFIG_DM_I2C_GPIO=y +CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR=y diff --git a/doc/board/samsung/axy17lte.rst b/doc/board/samsung/axy17lte.rst index e84fefec70..b7f299d1c7 100644 --- a/doc/board/samsung/axy17lte.rst +++ b/doc/board/samsung/axy17lte.rst @@ -66,26 +66,17 @@ and is therefore SBOOT's payload. It may be pure u-boot (with loading u-boot's payload from flash in mind), or u-boot + u-boot's payload.
-It should be kept in mind, that SBOOT binary patches it's payload after loading -in address range 0x401f8550-0x401f9280. Given SBOOT loads payload to 0x40001000, -a range of 0x1f7550-0x1f8280 (2061648-2065024) in a payload file -will be corrupted after loading to RAM. - Creating payload file """"""""""""""""""""" - Assemble FIT image for your kernel -- Create a file for u-boot payload ``touch sboot-payload`` -- Write zeroes till 0x200000 address to be sure SBOOT won't corrupt your info - ``dd if=/dev/zero of=sboot-payload bs=$((0x200000)) count=1`` -- Write u-boot to the start of the payload ``dd if=<u-boot.bin path> of=sboot-payload`` -- Write FIT image to payload from 0x200000 address - ``dd if=<FIT image path> of=sboot-payload seek=1 bs=2M``
Creating android boot image """"""""""""""""""""""""""" Once payload created, it's time for android image::
- mkbootimg --base 0x40000000 --kernel_offset 0x00000000 --ramdisk_offset 0x01000000 --tags_offset 0x00000100 --pagesize 2048 --second_offset 0x00f00000 --kernel <sboot-payload path> -o uboot.img + uboot=<path to u-boot.bin file> + ramdisk=<path to FIT payload file> + mkbootimg --base 0x40000000 --kernel_offset 0x00000000 --ramdisk_offset 0x01000000 --tags_offset 0x00000100 --pagesize 2048 --second_offset 0x00f00000 --kernel "$uboot" --ramdisk "$ramdisk" -o uboot.img
Note, that stock Samsung bootloader ignores offsets, set in mkbootimg.
diff --git a/include/configs/exynos78x0-common.h b/include/configs/exynos78x0-common.h index 8d3449f028..c4c41bf3e8 100644 --- a/include/configs/exynos78x0-common.h +++ b/include/configs/exynos78x0-common.h @@ -85,6 +85,7 @@ #endif
#define EXTRA_ENV_SETTINGS \ + "bootcmd=bootm $prevbl_initrd_start_addr\0" \ EXYNOS_DEVICE_SETTINGS \ EXYNOS_FDTFILE_SETTING \ MEM_LAYOUT_ENV_SETTINGS
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