Linux SDK Configuration introduction

Directory

   $ tree -L 1
   .
   ├── app
   ├── buildroot # Buildroot root filesystem build directory
   ├── build.sh -> device/rockchip/common/build.sh # Compile script
   ├── device # Compile related configuration files
   ├── docs # Documentation
   ├── envsetup.sh -> buildroot/build/envsetup.sh
   ├── external
   ├── kernel
   ├── Makefile -> buildroot/build/Makefile
   ├── mkfirmware.sh -> device/rockchip/common/mkfirmware.sh # Link script
   ├── prebuilts # Cross compilation toolchain
   ├── rkbin
   ├── rkflash.sh -> device/rockchip/common/rkflash.sh # Flash script
   ├── tools # Tools directory
   ├── u-boot

Introduction to configuration files

In the "device/rockchip/rk3588/" directory, there are configuration
files (xxxx.mk) for different board types, which are used to manage
the compilation configuration of each project of the SDK. The relevant
configuration introduction:

   # Target arch
   export RK_ARCH=arm64
   # Uboot defconfig
   export RK_UBOOT_DEFCONFIG=xxxx_defconfig
   # Kernel defconfig
   export RK_KERNEL_DEFCONFIG=xxxx_defconfig
   # Kernel defconfig fragment
   export RK_KERNEL_DEFCONFIG_FRAGMENT=xxxx.config
   # Kernel dts
   export RK_KERNEL_DTS=aio-3588sjd4.dts
   # parameter for GPT table
   export RK_PARAMETER=parameter-xxxx.txt
   # rootfs image path
   export RK_ROOTFS_IMG=ubuntu_rootfs/rootfs.img

Partition table

parameter

The parameter.txt file contains the partition information of the
firmware. Take parameter-ubuntu-fit.txt as an example:

path: "device/rockchip/rk3588/parameter-ubuntu-fit.txt"

   FIRMWARE_VER: 1.0
   MACHINE_MODEL: RK3588
   MACHINE_ID: 007
   MANUFACTURER: RK3588
   MAGIC: 0x5041524B
   ATAG: 0x00200800
   MACHINE: 0xffffffff
   CHECK_MASK: 0x80
   PWR_HLD: 0,0,A,0,1
   TYPE: GPT
   CMDLINE: mtdparts=rk29xxnand:0x00002000@0x00004000(uboot),0x00002000@0x00006000(misc),0x00020000@0x00008000(boot:bootable),0x00040000@0x00028000(recovery),0x00010000@0x00068000(backup),0x00c00000@0x00078000(rootfs),0x00040000@0x00c78000(oem),-@0x00cb8000(userdata:grow)
   uuid:rootfs=614e0000-0000-4b53-8000-1d28000054a9

The CMDLINE attribute is where we are concerned. Take uboot as an
example. In 0x00002000@0x00004000(uboot), 0x00004000 is the starting
position of the uboot partition, 0x00002000 is the size of the
partition, and so on.

package-file

The package-file is used to determine the required partition image and
image path when packaging the firmware, and it needs to be consistent
with the parameter.txt.

path: "tools/linux/Linux_Pack_Firmware/rockdev/rk3588-package-file"

   # NAME          Relative path
   #
   #HWDEF          HWDEF
   package-file    package-file
   bootloader      Image/MiniLoaderAll.bin
   parameter       Image/parameter.txt
   uboot           Image/uboot.img
   misc            Image/misc.img
   boot            Image/boot.img
   recovery        Image/recovery.img
   rootfs          Image/rootfs.img
   userdata        RESERVED
   backup          RESERVED