2370015_en-US

S32G_Howto_Boot_MiniLinux_from_QSPI

This article explains how to boot a minimal Linux on the S32G using only QSPI Nor, for the most important purposes: emergency/upgrade/test mode for Linux, or fast booting

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1 Background and Information Note... 2

1.1 Background note... 2

1.2 Description of the information required... 2

2 S32G QSPI Nor Mirror Layout Description... 3

2.1 S32G Linux BSP Support for QSPI Nor Boot... 3

2.2 S32G Yocto fsl-image-flash mechanism analysis... 5

2.3 Mirror Layout and Modification Targets for S32G QSPI Nor Boot... 7

3 Image modification and compilation... 8

3.1 Mirror image modification... 8

3.2 Yocto compilation methods... 10

3.3 Standalong compilation method... 11

4 How to shrink a Linux kernel image... 12

5 How to Make Minimum Rootfs. 12

5.1 Direct shrink based on existing rootfs... 12

5.2 Other methods... 14

6 Testing... 14

6.1 Burning Approach... 14

6.2 Running log. 16

7 How to add apps to Rootfs... 17

7.1 Adding methods to the Yocto environment... 17

7.2 Other methods ... 17

7.3 Test results... 17

8 Annexes... 17