Petalinux EMMC启动

环境：petalinux 2018.3

实现目的：在Petalinux下，qspiflash存储BOOT.bin，EMMC的blk0存储image.ub，blk1存储rootfs。

前提：该文档描述的方式需要开发板支持SD卡启动。即ZYNQ的SDC0接SD卡，SDC1接EMMC。

Petalinux 配置

petalinux-config->Subsystem AUTO Hardware Setting -> Advanced bootable images storage settings-> boot image settings;

选择primary flash，这里是将BOOT.bin设置为从qspi flash启动

->Subsystem AUTO Hardware Setting ->Advanced bootable images storage settings->kernel image settings;

选择primary sd，实际就是设置image.ub的存放区域。

Subsystem AUTO Hardware Settings ---> SD/SDIO Settings ---> Primary SD/SDIO

从SD卡启动的系统选择：

Primary SD/SDIO (ps7_sd_0)

从eMMC引导的系统选择：

Primary SD/SDIO (ps7_sd_1)

对于从eMMC引导的系统，即便选择了Primary SD/SDIO (psu_sd_1)，仍然不能完全启动，需要从文件

<plnx-proj-root>/project-spec/meta-plnx-generated/recipes-bsp/u-boot/configs/platform-auto.h

里，复制U-boot环境参数定义部分内容：

#define CONFIG_EXTRA_ENV_SETTINGS 该宏的参数

到文件

<plnx-proj-root>/project-spec/meta-user/recipes-bsp/u-boot/files/platform-top.h

中，并将后者全部 “mmcinfo” 修改为 “mmc dev ${sdbootdev}” ，共5处

关于SD和EMMC设备的说明：

首先需要明确：

关于Flash分区的说明：

在petalinux配置里看到的parttion0,1,2,3 的字样，其实就是在linux系统里面对应的设备是/dev/mtd0，/dev/mtd1，/dev/mtd2，/dev/mtd3。

Linux下格式化EMMC

格式化EMMC第一个BOOT分区为FAT32，用于存放image.ub。第二个分区为EXT4格式用于存放根文件系统。

切记输入 w保存配置。。。。。。

格式化之前如果之前已经分区过，首先需要umount，然后使用fdisk删除分区（d指令）

mkdosfs -F 32 /dev/mmcblk1p1 格式化为FAT32格式。

mkfs.ext4 /dev/mmcblk1p2 格式化为EXT4格式

格式为第一个分为为FAT32

格式化第一块分区，为FAT32格式，大小为128MB

root@MZ702P_FEP:~# fdisk /dev/mmcblk1Device contains neither a valid DOS partition table, nor Sun, SGI, OSF or GPT disklabelBuilding a new DOS disklabel. Changes will remain in memory only,until you decide to write them. After that the previous contentwon't be recoverable.`` `` The number of cylinders for this disk is set to 232448.There is nothing wrong with that, but this is larger than 1024,and could in certain setups cause problems with:\1) software that runs at boot time (e.g., old versions of LILO)\2) booting and partitioning software from other OSs(e.g., DOS FDISK, OS/2 FDISK)`` Command (m for help): nCommand actione  extendedp  primary partition (1-4)pPartition number (1-4): 1First cylinder (1-232448, default 1): 1Last cylinder or +size or +sizeM or +sizeK (1-232448, default 232448): +128M`` Command (m for help): tSelected partition 1Hex code (type L to list codes): l`` 0 Empty         1b Hidden Win95 FAT32   9f BSD/OS        1 FAT12         1c Hidden W95 FAT32 (LBA) a0 Thinkpad hibernation 4 FAT16 <32M       1e Hidden W95 FAT16 (LBA) a5 FreeBSD        5 Extended        3c Part.Magic recovery  a6 OpenBSD        6 FAT16         41 PPC PReP Boot     a8 Darwin UFS      7 HPFS/NTFS       42 SFS          a9 NetBSD        a OS/2 Boot Manager   63 GNU HURD or SysV    ab Darwin boot      b Win95 FAT32      80 Old Minix       b7 BSDI fs        c Win95 FAT32 (LBA)   81 Minix / old Linux   b8 BSDI swap       e Win95 FAT16 (LBA)   82 Linux swap       be Solaris boot     f Win95 Ext'd (LBA)   83 Linux         eb BeOS fs        11 Hidden FAT12      84 OS/2 hidden C: drive  ee EFI GPT        12 Compaq diagnostics   85 Linux extended     ef EFI (FAT-12/16/32)  14 Hidden FAT16 <32M   86 NTFS volume set    f0 Linux/PA-RISC boot  16 Hidden FAT16      87 NTFS volume set    f2 DOS secondary     17 Hidden HPFS/NTFS    8e Linux LVM       fd Linux raid autodetect Hex code (type L to list codes): bChanged system type of partition 1 to b (Win95 FAT32)`` Command (m for help): wThe partition table has been altered.Calling ioctl() to re-read partition tablemmcblk1: p1root@MZ702P_FEP:~# mkdosfs -F 32 /dev/mmcblk1p1root@MZ702P_FEP:~#

格式化第二块分区，格式为ext4，大小为剩余的emmc空间

root@MZ702P_FEP:~# fdisk /dev/mmcblk1Device contains neither a valid DOS partition table, nor Sun, SGI, OSF or GPT disklabelBuilding a new DOS disklabel. Changes will remain in memory only,until you decide to write them. After that the previous contentwon't be recoverable.The number of cylinders for this disk is set to 232448.There is nothing wrong with that, but this is larger than 1024,and could in certain setups cause problems with:\1) software that runs at boot time (e.g., old versions of LILO)\2) booting and partitioning software from other OSs(e.g., DOS FDISK, OS/2 FDISK)Command (m for help): nCommand actione  extendedp  primary partition (1-4)pPartition number (1-4): 2First cylinder (1-232448, default 1): 回车Last cylinder or +size or +sizeM or +sizeK (1-232448, default 232448): 回车Command (m for help): wThe partition table has been altered.Calling ioctl() to re-read partition tablemmcblk1: p1root@MZ702P_FEP:~# mkfs.ext4 /dev/mmcblk1p2root@MZ702P_FEP:~#

df -h显示硬盘信息

df -h

更新系统文件

使用tftp更新

服务器的IP为192.168.0.100

板子的IP为192.168.0.10

tftp 用于把服务器的BOOT.BIN文件传输到嵌入式板子

tftp -r /BOOT.BIN -l ./BOOT.BIN -g 192.168.0.100:69

更新BOOT.BIN

查看FLASH分区

cat /proc/mtd

我们在linux将文件BOO.bin拷贝到qspi flash的mtd0分区中

擦除flash设备

flash_erase /dev/mtd0 0 0

之后执行flash拷贝命令

 flashcp BOOT.bin /dev/mtd0

tftp -r /BOOT.BIN -l ./BOOT.BIN -g 192.168.0.100:69flash_erase /dev/mtd0flashcp BOOT.BIN /dev/mtd0

更新内核和文件系统

查看系统挂载

root@MZ702P_FEP:~# df -hFilesystem        Size   Used Available Use% Mounted ondevtmpfs        491.2M   4.0K  491.2M  0% /devtmpfs          503.1M  116.0K  502.9M  0% /runtmpfs          503.1M   52.0K  503.0M  0% /var/volatile/dev/mmcblk0p2      14.3G   53.2M   13.5G  0% /run/media/mmcblk0p2/dev/mmcblk0p1      97.5M   15.1M   82.4M 15% /run/media/mmcblk0p1/dev/mmcblk1p1     120.2M   3.8M  116.4M  3% /run/media/mmcblk1p1/dev/mmcblk1p2      6.8G   33.5M   6.4G  1% /run/media/mmcblk1p2

/run/media/mmcblk1p1 目录用于存放image.ub/run/media/mmcblk1p1 目录用于存放根文件系统

更新内核

cd /run/media/mmcblk1p1tftp -r /image.ub -l ./image.ub -g 192.168.0.100:69

更新文件系统

cd /run/media/mmcblk1p2tftp -r /rootfs.tar.gz -l ./rootfs.tar.gz -g 192.168.0.100:69tar -zxvpf rootfs.tar.gzrm -rf rootfs.tar.gz

mkfs.ext4指令增加

petalinux默认配置的文件系统不支持mkfs.ext4指令。

新增命令

petalinux没有配置busybox的命令，但是可以通过

petalinux-config -c rootfs

来配置系统下的内嵌命令。

新增mkfs.ext4命令

petalinux-config -c rootfs -> Filesystem Packages -> base -> e2fsprogsenable e2fsprogsenable e2fsprogs-mke2fs

petalinux 2018.3 emmc 启动内核bug

问题描述

petalinux2018.3中会有一个这样的bug（实际上之前也存在，官方修复还是有漏洞），当像我们这样SD0接入SD卡，SD1接入eMMC时，当SD卡没有插入时启动，尽管配置petalinux的主sd为ps7_sd_1，但是其uboot启动时会报错找不到mmc 0。

当同时激活 SD0 (对应SD卡座) 和 SD1 (对应板载 emmc) 时，当从 emmc 启动，报如下错误，

U-Boot 2018.01 (Mar 25 2022 - 14:08:43 +0000) Xilinx Zynq ZC702Board: Xilinx ZynqSilicon: v3.1I2C:  readyDRAM: ECC disabled 1 GiBMMC:  Card did not respond to voltage select!mmc_init: -95, time 22mmc@e0100000 - probe failed: -95sdhci_transfer_data: Error detected in status(0x208000)!Card did not respond to voltage select!mmc_init: -95, time 23SF: Detected n25q128 with page size 256 Bytes, erase size 64 KiB, total 16 MiB*** Warning - bad CRC, using default environmentIn:  serial@e0001000Out:  serial@e0001000Err:  serial@e0001000Board: Xilinx ZynqSilicon: v3.1Net:  ZYNQ GEM: e000b000, phyaddr 0, interface rgmii-idWarning: ethernet@e000b000 (eth4) using random MAC address - 8e:05:c1:a3:31:86eth4: ethernet@e000b000U-BOOT for MZ702P_FEPHit any key to stop autoboot: 0 Card did not respond to voltage select!mmc_init: -95, time 24** Bad device mmc 0 **no mmc device at slot 0Zynq> Zynq>

解决方法

配置 Primary SD 为 SD1 后，对应的更改没有更新到 u-boot 中去。

打开

<petalinux-project-path>/project-spec/meta-plnx-generated/recipes-bsp/u-boot/configs

下的文件platform-auto.h，有如下宏，

/* BOOTCOMMAND */\#define CONFIG_BOOTCOMMAND  "run default_bootcmd"\#endif /* __PLNX_CONFIG_H */

打开

**<petalinux-project-path>/project-spec/meta-user/recipes-bsp/u-boot/files**

下的文件platform-top.h，添加如下内容 (对上述宏作一个重置)，

/*************************************************************************************************************************************//* fix SD0 is sd card, SD1 is emmc, if no card insert into SD0 slot, zynq cannot detect SD1 emmc. (Vivado 2018.2 + Petalinux 2018.2) *//*************************************************************************************************************************************/\#ifdef CONFIG_BOOTCOMMAND\#undef CONFIG_BOOTCOMMAND\#define CONFIG_BOOTCOMMAND "mmc dev ${sdbootdev}; run default_bootcmd"\#endif/*************************************************************************************************************************************/

并把下面的内容拷贝到

**<petalinux-project-path>/project-spec/meta-user/recipes-bsp/u-boot/files/platform-top.h**

该文件中。

要拷贝的内容

/* Extra U-Boot Env settings */\#define CONFIG_EXTRA_ENV_SETTINGS \SERIAL_MULTI \ CONSOLE_ARG \ DFU_ALT_INFO_RAM \ DFU_ALT_INFO_MMC \ PSSERIAL0 \ "nc=setenv stdout nc;setenv stdin nc;\0" \ "ethaddr=00:0a:35:00:1e:53\0" \"bootenv=uEnv.txt\0" \ "importbootenv=echo \"Importing environment from SD ...\"; " \     "env import -t ${loadbootenv_addr} $filesize\0" \ "loadbootenv=load mmc $sdbootdev:$partid ${loadbootenv_addr} ${bootenv}\0" \ "sd_uEnvtxt_existence_test=test -e mmc $sdbootdev:$partid /uEnv.txt\0" \ "uenvboot=" \     "if run sd_uEnvtxt_existence_test; then " \       "run loadbootenv; " \       "echo Loaded environment from ${bootenv}; " \       "run importbootenv; " \       "fi; " \     "if test -n $uenvcmd; then " \       "echo Running uenvcmd ...; " \       "run uenvcmd; " \     "fi\0" \ "autoload=no\0" \ "sdbootdev=1\0" \ "clobstart=0x10000000\0" \ "netstart=0x10000000\0" \ "dtbnetstart=0x23fff000\0" \ "loadaddr=0x10000000\0" \ "bootsize=0x500000\0" \ "bootstart=0x0\0" \ "boot_img=BOOT.BIN\0" \ "load_boot=tftpboot ${clobstart} ${boot_img}\0" \ "update_boot=setenv img boot; setenv psize ${bootsize}; setenv installcmd \"install_boot\"; run load_boot test_img; setenv img; setenv psize; setenv installcmd\0" \ "sd_update_boot=echo Updating boot from SD; mmc dev ${sdbootdev} && fatload mmc ${sdbootdev}:1 ${clobstart} ${boot_img} && run install_boot\0" \ "install_boot=sf probe 0 && sf erase ${bootstart} ${bootsize} && " \     "sf write ${clobstart} ${bootstart} ${filesize}\0" \ "bootenvsize=0x20000\0" \ "bootenvstart=0x500000\0" \ "eraseenv=sf probe 0 && sf erase ${bootenvstart} ${bootenvsize}\0" \ "jffs2_img=rootfs.jffs2\0" \ "load_jffs2=tftpboot ${clobstart} ${jffs2_img}\0" \ "update_jffs2=setenv img jffs2; setenv psize ${jffs2size}; setenv installcmd \"install_jffs2\"; run load_jffs2 test_img; setenv img; setenv psize; setenv installcmd\0" \ "sd_update_jffs2=echo Updating jffs2 from SD; mmc dev ${sdbootdev} && fatload mmc ${sdbootdev}:1 ${clobstart} ${jffs2_img} && run install_jffs2\0" \"install_jffs2=sf probe 0 && sf erase ${jffs2start} ${jffs2size} && " \     "sf write ${clobstart} ${jffs2start} ${filesize}\0" \ "kernel_img=image.ub\0" \ "load_kernel=tftpboot ${clobstart} ${kernel_img}\0" \ "update_kernel=setenv img kernel; setenv psize ${kernelsize}; setenv installcmd \"install_kernel\"; run load_kernel ${installcmd}; setenv img; setenv psize; setenv installcmd\0" \ "install_kernel=mmc dev ${sdbootdev} && fatwrite mmc ${sdbootdev} ${clobstart} ${kernel_img} ${filesize}\0" \ "cp_kernel2ram=mmc dev ${sdbootdev} && fatload mmc ${sdbootdev} ${netstart} ${kernel_img}\0" \ "dtb_img=system.dtb\0" \ "load_dtb=tftpboot ${clobstart} ${dtb_img}\0" \ "update_dtb=setenv img dtb; setenv psize ${dtbsize}; setenv installcmd \"install_dtb\"; run load_dtb test_img; setenv img; setenv psize; setenv installcmd\0" \ "sd_update_dtb=echo Updating dtb from SD; mmc dev ${sdbootdev} && fatload mmc ${sdbootdev}:1 ${clobstart} ${dtb_img} && run install_dtb\0" \ "loadbootenv_addr=0x00100000\0" \ "fault=echo ${img} image size is greater than allocated place - partition ${img} is NOT UPDATED\0" \ "test_crc=if imi ${clobstart}; then run test_img; else echo ${img} Bad CRC - ${img} is NOT UPDATED; fi\0" \ "test_img=setenv var \"if test ${filesize} -gt ${psize}\\; then run fault\\; else run ${installcmd}\\; fi\"; run var; setenv var\0" \ "netboot=tftpboot ${netstart} ${kernel_img} && bootm\0" \ "default_bootcmd=run uenvboot; run cp_kernel2ram && bootm ${netstart}\0" \ ""

重新编译工程即可。

" \

“sd_update_dtb=echo Updating dtb from SD; mmc dev ${sdbootdev} && fatload mmc ${sdbootdev}:1 ${clobstart} ${dtb_img} && run install_dtb\0” \

“loadbootenv_addr=0x00100000\0” \

“fault=echo ${img} image size is greater than allocated place - partition ${img} is NOT UPDATED\0” \

“test_crc=if imi ${clobstart}; then run test_img; else echo ${img} Bad CRC - ${img} is NOT UPDATED; fi\0” \

“test_img=setenv var “if test ${filesize} -gt ${psize}\; then run fault\; else run ${installcmd}\; fi”; run var; setenv var\0” \

“netboot=tftpboot ${netstart} ${kernel_img} && bootm\0” \

“default_bootcmd=run uenvboot; run cp_kernel2ram && bootm ${netstart}\0” \

“”


重新编译工程即可。