mirror of
https://github.com/AsahiLinux/u-boot
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43 lines
1.4 KiB
Text
43 lines
1.4 KiB
Text
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QSPI Boot source support Overview
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-------------------
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1. LS1043A
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LS1043AQDS
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2. LS2080A
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LS2080AQDS
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3. LS1012A
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LS1012AQDS
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LS1012ARDB
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4. LS1046A
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LS1046AQDS
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LS1046ARDB
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Booting from QSPI
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-------------------
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Booting from QSPI requires two images, RCW and u-boot-dtb.bin.
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The difference between QSPI boot RCW image and NOR boot image is the PBI
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command sequence for setting the boot location pointer. It's should point
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to the address for u-boot in QSPI flash.
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RCW image should be written to the beginning of QSPI flash device.
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Example of using u-boot command
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=> sf probe 0:0
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SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB
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=> sf erase 0 +<size of rcw image>
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SF: 65536 bytes @ 0x0 Erased: OK
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=> sf write <rcw image in memory> 0 <size of rcw image>
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SF: 164 bytes @ 0x0 Written: OK
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To get the QSPI image, build u-boot with QSPI config, for example,
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<board_name>_qspi_defconfig. The image needed is u-boot-dtb.bin.
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The u-boot image should be written to 0x10000(but 0x1000 for LS1043A, LS2080A).
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=> sf probe 0:0
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SF: Detected S25FL256S_64K with page size 256 Bytes, erase size 64 KiB, total 32 MiB
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=> sf erase 10000 +<size of u-boot image>
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SF: 589824 bytes @ 0x10000 Erased: OK
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=> sf write <u-boot image in memory> 10000 <size of u-boot image>
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SF: 580966 bytes @ 0x10000 Written: OK
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With these two images in QSPI flash device, the board can boot from QSPI.
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