上面是我創建的群聊，歡迎新朋友的加入。

目錄

1.獲取官方kernel

2.編譯內核

3.內核燒錄

4.調整uboot

5.卡分區

1.獲取官方kernel

地址：http://git.freescale.com/git/cgit.cgi/imx/linux-imx.git/tag/?h=imx_4.1.15_2.0.0_ga&id=rel_imx_4.1.15_2.1.0_ga

拉到最后，先把源碼搞下來

2.編譯內核

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- distclean

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- imx_v7_defconfig

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- menuconfig

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- all -j4

不知道怎么回事，上來編譯就報錯了

jun@ubuntu:~/i.mx6/source/linux$ make clean

./scripts/gcc-goto.sh: 行 4: $'\r': 未找到命令

./scripts/gcc-goto.sh: 行 21: 警告: 立即文檔在第 5 行被文件結束符分隔 (需要 `END')

./scripts/gcc-version.sh: 行 11: $'\r': 未找到命令

./scripts/gcc-version.sh: 行 33: 語法錯誤: 未預期的文件結尾

/bin/sh: 1: [: -lt: unexpected operator

./scripts/gcc-version.sh: 行 11: $'\r': 未找到命令

./scripts/gcc-version.sh: 行 33: 語法錯誤: 未預期的文件結尾

/bin/sh: 1: [: -lt: unexpected operator

./scripts/link-vmlinux.sh: 行 27: $'\r': 未找到命令

: 無效選項link-vmlinux.sh: 第 29 行: set: -

set: 用法: set [--abefhkmnptuvxBCHP] [-o 選項名] [--] [參數 ...]

./scripts/link-vmlinux.sh: 行 30: $'\r': 未找到命令

./scripts/link-vmlinux.sh: 行 33: 未預期的符號 `$'\r'' 附近有語法錯誤

'/scripts/link-vmlinux.sh: 行 33: `info()

Makefile:1195: recipe for target 'vmlinuxclean' failed

make: *** [vmlinuxclean] Error 2

jun@ubuntu:~/i.mx6/source/linux$ ls -la

解決辦法

sudo apt install dos2unix

dos2unix ./scripts/gcc-goto.sh

dos2unix ./scripts/gcc-version.sh

dos2unix ./scripts/link-vmlinux.sh

3.內核燒錄

找到編譯出來的文件

其中zimage就是內核固件，燒錄的就是它，一個6M的文件

按照官方指導，通過DD燒錄到SD卡

搞完內核。還有一個設備樹也要捎進去

4.調整uboot

啟動是啟動了，但是這不是我剛剛編譯出來的

將uboot的頭文件按照燒錄的地址設置啟動位置

#define CONFIG_SYS_MMC_IMG_LOAD_PART1

#ifdef CONFIG_SYS_BOOT_NAND

#define CONFIG_MFG_NAND_PARTITION "mtdparts=gpmi-nand:64m(boot),16m(kernel),16m(dtb),1m(misc),-(rootfs) "

#else

#define CONFIG_MFG_NAND_PARTITION ""

#endif

#define CONFIG_MFG_ENV_SETTINGS \

"mfgtool_args=setenv bootargs console=${console},${baudrate} " \

CONFIG_BOOTARGS_CMA_SIZE \

"rdinit=/linuxrc " \

"g_mass_storage.stall=0 g_mass_storage.removable=1 " \

"g_mass_storage.file=/fat g_mass_storage.ro=1 " \

"g_mass_storage.idVendor=0x066F g_mass_storage.idProduct=0x37FF "\

"g_mass_storage.iSerialNumber=\"\" "\

CONFIG_MFG_NAND_PARTITION \

"clk_ignore_unused "\

"\0" \

"initrd_addr=0x83800000\0" \

"initrd_high=0xffffffff\0" \

"bootcmd_mfg=run mfgtool_args;bootz ${loadaddr} ${initrd_addr} ${fdt_addr};\0" \

#if defined(CONFIG_SYS_BOOT_NAND)

#define CONFIG_EXTRA_ENV_SETTINGS \

CONFIG_MFG_ENV_SETTINGS \

"panel=TFT43AB\0" \

"fdt_addr=0x83000000\0" \

"fdt_high=0xffffffff\0" \

"console=ttymxc0\0" \

"bootargs=console=ttymxc0,115200 ubi.mtd=4 " \

"root=ubi0:rootfs rootfstype=ubifs " \

CONFIG_BOOTARGS_CMA_SIZE \

"mtdparts=gpmi-nand:64m(boot),16m(kernel),16m(dtb),1m(misc),-(rootfs)\0"\

"bootcmd=nand read ${loadaddr} 0x4000000 0x800000;"\

"nand read ${fdt_addr} 0x5000000 0x100000;"\

"bootz ${loadaddr} - ${fdt_addr}\0"

#else

#define CONFIG_EXTRA_ENV_SETTINGS \

CONFIG_MFG_ENV_SETTINGS \

"script=boot.scr\0" \

"image=zImage\0" \

"console=ttymxc0\0" \

"fdt_high=0xffffffff\0" \

"initrd_high=0xffffffff\0" \

"fdt_file=undefined\0" \

"fdt_addr=0x83000000\0" \

"boot_fdt=try\0" \

"ip_dyn=yes\0" \

"panel=TFT43AB\0" \

"mmcdev="__stringify(CONFIG_SYS_MMC_ENV_DEV)"\0" \

"mmcpart=" __stringify(CONFIG_SYS_MMC_IMG_LOAD_PART) "\0" \

"mmcroot=" CONFIG_MMCROOT " rootwait rw\0" \

"mmcautodetect=yes\0" \

"mmcargs=setenv bootargs console=${console},${baudrate} " \

CONFIG_BOOTARGS_CMA_SIZE \

"root=${mmcroot}\0" \

"loadbootscript=" \

"fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \

"bootscript=echo Running bootscript from mmc ...; " \

"source\0" \

"loadimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}\0" \

"loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}\0" \

"mmcboot=echo Booting from mmc ...; " \

"run mmcargs; " \

"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \

"if run loadfdt; then " \

"bootz ${loadaddr} - ${fdt_addr}; " \

"else " \

"if test ${boot_fdt} = try; then " \

"bootz; " \

"else " \

"echo WARN: Cannot load the DT; " \

"fi; " \

"fi; " \

"else " \

"bootz; " \

"fi;\0" \

"netargs=setenv bootargs console=${console},${baudrate} " \

CONFIG_BOOTARGS_CMA_SIZE \

"root=/dev/nfs " \

"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \

"netboot=echo Booting from net ...; " \

"run netargs; " \

"if test ${ip_dyn} = yes; then " \

"setenv get_cmd dhcp; " \

"else " \

"setenv get_cmd tftp; " \

"fi; " \

"${get_cmd} ${image}; " \

"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \

"if ${get_cmd} ${fdt_addr} ${fdt_file}; then " \

"bootz ${loadaddr} - ${fdt_addr}; " \

"else " \

"if test ${boot_fdt} = try; then " \

"bootz; " \

"else " \

"echo WARN: Cannot load the DT; " \

"fi; " \

"fi; " \

"else " \

"bootz; " \

"fi;\0" \

"findfdt="\

"if test $fdt_file = undefined; then " \

"if test $board_name = EVK && test $board_rev = 9X9; then " \

"setenv fdt_file imx6ull-9x9-evk.dtb; fi; " \

"if test $board_name = EVK && test $board_rev = 14X14; then " \

"setenv fdt_file imx6ull-14x14-evk.dtb; fi; " \

"if test $fdt_file = undefined; then " \

"echo WARNING: Could not determine dtb to use; fi; " \

"fi;\0" \

#define CONFIG_BOOTCOMMAND \

"run findfdt;" \

"mmc dev ${mmcdev};" \

"mmc dev ${mmcdev}; if mmc rescan; then " \

"if run loadbootscript; then " \

"run bootscript; " \

"else " \

"if run loadimage; then " \

"run mmcboot; " \

"else run netboot; " \

"fi; " \

"fi; " \

"else run netboot; fi"

#endif

現在還是沒跑起來

將之前yocto的鏡像下載一遍，替換掉uboot、zimage和設備樹

現在是可以進linux的，但是沒有正常跑起來，內核是今天編譯出來的

5.卡分區

現在跑起來是因為我先下載了一個yocto出來的鏡像，對卡進行了分區。

如果沒得鏡像，那這個uboot和kernel就不能正常用了

從SD卡讀zimage和設備樹是要文件系統的

嘗試自行劃分一個分區出來

首先對照官方出來的卡狀態

98

總共兩分區，按理說只要和這個分區一樣，uboot就可以找到內核鏡像和設備樹，以及文件系統了

首先格式化整個卡片

開始分配第一個分區，最小是16M，分不出8M。

第二個分區

整個盤

為了確定改動是有效的，將內核和uboot都全編譯一次

時間戳

首先寫入uboot

拷貝zimage和設備樹進boot盤

文件系統先空著不管他

查看終端打印信息

其中uboot是U-Boot 2016.03 (Oct 23 2019 - 15:52:59 +0800)

kernel是：Oct 23 15:56:44 CST 2019

說明是正常從uboot跳轉到了kernel

U-Boot 2016.03 (Oct 23 2019 - 15:52:59 +0800)

CPU: Freescale i.MX6ULL rev1.0 528 MHz (running at 396 MHz)

CPU: Industrial temperature grade (-40C to 105C) at 31C

Reset cause: POR

Board: MX6ULL 14x14 EVK

I2C: ready

DRAM: 512 MiB

NAND: 256 MiB

MMC: FSL_SDHC: 0

*** Warning - bad CRC, using default environment

Display: TFT43AB (480x272)

Video: 480x272x24

In: serial

Out: serial

Err: serial

Net: FEC0 MXC: board_eth_init:failed

No ethernet found.

Normal Boot

Hit any key to stop autoboot: 0

switch to partitions #0, OK

mmc0 is current device

switch to partitions #0, OK

mmc0 is current device

reading boot.scr

** Unable to read file boot.scr **

reading zImage

6680408 bytes read in 587 ms (10.9 MiB/s)

Booting from mmc ...

reading imx6ull-14x14-evk.dtb

35969 bytes read in 22 ms (1.6 MiB/s)

Kernel image @ 0x80800000 [ 0x000000 - 0x65ef58 ]

## Flattened Device Tree blob at 83000000

Booting using the fdt blob at 0x83000000

Using Device Tree in place at 83000000, end 8300bc80

Starting kernel ...

Booting Linux on physical CPU 0x0

Linux version 4.1.15 (jun@ubuntu) (gcc version 4.9.4 (Linaro GCC 4.9-2017.01) ) #2 SMP PREEMPT Wed Oct 23 15:56:44 CST 2019

CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c53c7d

CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache

Machine model: Freescale i.MX6 ULL 14x14 EVK Board

Reserved memory: created CMA memory pool at 0x8c000000, size 320 MiB

Reserved memory: initialized node linux,cma, compatible id shared-dma-pool

Memory policy: Data cache writealloc

PERCPU: Embedded 12 pages/cpu @8bb32000 s16960 r8192 d24000 u49152

Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048

Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk0p2 rootwait rw

PID hash table entries: 2048 (order: 1, 8192 bytes)

Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)

總結

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