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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
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