Cvitek-v4.2.0 编译流程

编译流程说明

# 1. source build/envsetup_soc.sh（设置环境变量）
yogurt@s:v4.2.x$ source build/envsetup_soc.sh
  -------------------------------------------------------------------------------------------------------
    Usage:
    (1) menuconfig - Use menu to configure your board.
        ex: $ menuconfig

    (2) defconfig $CHIP_ARCH - List EVB boards($BOARD) by CHIP_ARCH.
       ** cv181x ** -> ['cv181x', 'cv1823a', 'cv1821a', 'cv1820a', 'cv1811h', 'cv1811ha', 'cv1812ha', 'cv1811c', 'cv1810c', 'cv1810ca', 'cv1812h', 'cv1812cp', 'cv1813h', 'cv1813ha']
       ** cv180x ** -> ['cv180x', 'cv1800b', 'cv1800c', 'cv1801b', 'cv1801c', 'cv180zb']
        ex: $ defconfig cv183x

    (3) defconfig $BOARD - Choose EVB board settings.
        ex: $ defconfig cv1835_wevb_0002a
        ex: $ defconfig cv1826_wevb_0005a_spinand
        ex: $ defconfig cv181x_fpga_c906
  -------------------------------------------------------------------------------------------------------

# 2. 使用 defconfig 选定板卡配置
yogurt@s:v4.2.x$ defconfig cv1811c_wevb_0006a_emmc
 Run defconfig function
Loaded configuration '/home/yogurt/Documents/sophgo/v4.2.x/build/boards/cv181x/cv1811c_wevb_0006a_emmc/cv1811c_wevb_0006a_emmc_defconfig'
Configuration saved to '.config'
Loaded configuration '.config'
Minimal configuration saved to '/home/yogurt/Documents/sophgo/v4.2.x/build/.defconfig'
~/Documents/sophgo/v4.2.x/build ~/Documents/sophgo/v4.2.x
~/Documents/sophgo/v4.2.x

====== Environment Variables =======

  PROJECT: cv1811c_wevb_0006a_emmc, DDR_CFG=ddr3_1866_x16
  CHIP_ARCH: CV181X, DEBUG=0
  SDK VERSION: musl_riscv64, RPC=0
  ATF options: ATF_KEY_SEL=default, BL32=1
  Linux source folder:linux_5.10, Uboot source folder: u-boot-2021.10
  CROSS_COMPILE_PREFIX: riscv64-unknown-linux-musl-
  ENABLE_BOOTLOGO: 0
  Flash layout xml: /home/yogurt/Documents/sophgo/v4.2.x/build/boards/cv181x/cv1811c_wevb_0006a_emmc/partition/partition_emmc.xml
  Support EMMC large part size: n
  Sensor tuning bin: gcore_gc4653
  Output path: /home/yogurt/Documents/sophgo/v4.2.x/install/soc_cv1811c_wevb_0006a_emmc

# 3. 运行 build_all 开始编译
yogurt@s:v4.2.x$ build_all

🐾设置环境变量：主要是提供相关 shell 函数，比如 defconfig, menuconfig, build_kernel, build_uboot, build_all 等，给用户手动调用。
🐾选定板卡配置：不同板卡会有不同的配置，包含：
1. 🌱 设备树
2. 🌱 linux kernel 配置
3. 🌱 uboot 配置
4. 🌱 flash 分区表
5. 🌱 内存布局
6. 🌱 其他配置
🐾开始编译：可以运行 build_all 编译完整 SDK，也可以运行 build_uboot/build_kernel 等编译单个模块。

📌 对正常启动系统来说，需要编译得到的文件有：

fip.bin/fip_spl.bin：Bootloader，包含 fsbl, opensbi(riscv only), u-boot；
boot.{flash_type}：Linux 内核；
rootfs.{flash_type}：大核用的文件系统；
yoc.bin：小核 Alios 的固件。

文件夹	编译命令	生成文件
`fsbl`	`build_uboot`	`bl2.bin` -> `fip.bin`
`opensbi`	`build_uboot`	`fw_dynamic.bin` + `ddr_param.bin` -> `fip.bin`
`u-boot-2021.10`	`build_uboot`	`u-boot-raw_spl.bin` / `u-boot-raw.bin` -> `fip.bin`
`cvi_alios`	`build_uboot` 或 `build_alios` 单独编译	`yoc.bin` -> `fip.bin`
`linux_5.10`	`build_kernel(arm)`/`build_opensbi_kernel(riscv)`	`boot.xxx` 内核
`ramdisk`	`pack_rootfs`	`rootfs.xxx` 文件系统
`ramdisk`	`build_ramboot`	`ramboot` 用做 `recovery`