firmware embedded engineer linux kernel enviroment create Bootloader & linux configuration

Our board is flashed linux kerel build and we can read & debug jtag, next steam is to create bootloader firmware file from the kernel enviroment

1st flash: (modified files)
arisc.fex, aultls32.fex, aultools.fex, battery_charge.bmp, battery_charge.bmp.lzma, bempty.bmp, bempty.bmp.lzma,board.fex,
board_config.bin, board_config.fex, boot-resource.fex, boot-resource.ini, boot.fex, boot_package.cfg, boot_package.fex,
boot_package_nor.cfg, bootlogo.bmp, bootlogo.bmp.lzma, cardscript.fex, cardscript_secure.fex, cardtool.fex, config.fex,
diskfs.fex, dlinfo.fex, env.cfg, env.fex, env_burn.cfg, esm.fex, extPart.fex, fes1.fex, image.cfg, image_crashdump.cfg,
kernel.fex

(doesn't include bootloader) - you can only detect jtag now;

Create and install bootloader:

https://github.com/allwinner-zh/bootloader/tree/master/u-boot-2011.09/arch/arm/cpu/armv7/sun8iw7

example respitory how to create bootloader file, which files are required to adjust;

bootloader/u-boot-2014.07/arch/arm/cpu/armv7/sun8iw17p1/
dram/
makefile
-
mmc/
mmc.c
mmc.h
mmc_bsp.c
mmc_bsp.h
mmc_def.h

(mmc.c - has function to erase, partition
mmc->erase_grp_size = 1;
mmc->part_config = MMCPART_NOAVAILABLE;)
-
spl/
makefile
clock_spl.c
ctype.c
debug.c
eabi_compat.c
gic_spl.c
gpio_spl.c
rtc_region.c
serial_spl.c
smc_spl.c
smta_spl.c
ss_spl.c
timer_spl.c
-
usb/
usbc.c
usbc_dev.c
usbc_dma.c
usbc_host.c
usbc_i.h
usbc_phy.c
usbc_resource.c
-
makerfile
-
board.c
#include <boot_type.h>
#include <sys_partition.h>
#include <sys_config.h>
#include <power/sunxi/pmu.h>
#include <smc.h>
#include <sunxi_board.h>
#include <fdt_support.h>
#include <sys_config_old.h>
#include <cputask.h>

sys_config.fex - includes camera and wifi pheripals - we need right ones for camera and how to set it up @hoang vo
-
ccmu.c
-
clock.c
-
cpu_info.c
-
efuse.c
-
gic.c
-
key.c
-
lowlevel_init.S
-
reset.S
-
spare_head.c
-
ss.c
-
timer.c
-
u-boot-spl.ids
-

create bootloader file to flash on jlink via jtag, then bring up the board via linux configuration
source code files along with camera and wifi pheripals to complete the job.