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Update polarfire.md #201

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Update polarfire.md #201

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16 changes: 16 additions & 0 deletions Hardware/polarfire.md
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Original file line number Diff line number Diff line change
Expand Up @@ -117,3 +117,19 @@ fatload mmc 0 0x1000200000 seL4-uImage
fatload mmc 0 0x1020200000 kernel.dtb
bootm 0x1000200000 - 0x1020200000
```

## Booting on emulated Polarfire in QEMU

QEMU support emulation of the polarfire and can boot sel4test via direct kernel boot like this:

```
qemu-system-riscv64 -M microchip-icicle-kit -smp 5 -m 2G -display none -serial stdio -serial null -serial null -kernel images/sel4test-driver-image-riscv-polarfire -dtb mpfs_icicle.dtb
```

where the dtb is generated by running:

```
dtc -I dts -O dtb seL4/tools/dts/mpfs_icicle.dts > mpfs_icicle.dtb
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@wom-bat wom-bat Oct 3, 2023 •
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Should be:

dtc -I dts -O dtb ../kernel/tools/dts/mpfs_icicle.dts > mpfs_icicle.dtb

assuming your current directory is the same as for the QEMU command above.

```

note that the dtb has ommitted any overlays that were used by seL4 because they caused QEMU to not print to the UART.
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