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board/sifive/hifive-unleashed: include QEMU instructions in readme.txt

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The upstream QEMU 'sifive_u' machine supports running upstream U-Boot
for the SiFive HiFive Unleashed board out of the box.

Add the QEMU instructions for testing in readme.txt.

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Bin Meng 2023-06-27 00:00:30 +08:00 committed by Thomas Petazzoni
parent 595939e31f
commit 4bb810fc5d
1 changed files with 17 additions and 0 deletions
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17
board/sifive/hifive-unleashed/readme.txt
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@ -113,3 +113,20 @@ Booting the SPI flash on the board
Make sure that the all DIP switches are set to the off position for Make sure that the all DIP switches are set to the off position for
default boot mode (MSEL mode = 0110) to boot from SPI flash. default boot mode (MSEL mode = 0110) to boot from SPI flash.
Testing under QEMU
==================
The SD card image can be tested using QEMU:
$ qemu-system-riscv64 -M sifive_u,msel=11 -smp 5 -m 8G \
-display none -serial stdio -nic user \
-bios output/images/u-boot-spl.bin \
-drive file=output/images/sdcard.img,if=sd
The SPI flash image can be tested with a slightly different command:
$ qemu-system-riscv64 -M sifive_u,msel=6 -smp 5 -m 8G \
-display none -serial stdio -nic user \
-bios output/images/u-boot-spl.bin \
-drive file=output/images/spi-nor.img,if=mtd