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With QEMU v4.2 release that has improved the emulation fidelity of 'sifive_u' machine, OpenSBI v0.4 / U-Boot v2019.10-rc1 / Linux kernel v5.3-rc2 images built for the SiFive HiFive Unleashed board can be used out of the box without any special hack. Update our documents to mention 'qemu/sifive_u' platform should only be used with QEMU v4.1 or before, and it will be dropped sometime in the future release. Going forward, 'sifive/fu540' platform can be used on both real hardware and QEMU v4.2+ 'sifive_u' machine. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
61 lines
1.7 KiB
Markdown
61 lines
1.7 KiB
Markdown
QEMU SiFive Unleashed Machine Platform
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======================================
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The **QEMU SiFive Unleashed Machine** is an emulation of the SiFive Unleashed
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platform.
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To build this platform specific library and firmwares, provide the
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*PLATFORM=qemu/sifive_u* parameter to the top level `make` command line.
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Note with QEMU v4.2 release, the QEMU *sifive_u* machine has been updated to
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closely match the SiFive HiFive Unleashed hardware and can therefore run the
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same firmware as what gets loaded onto the board, and OpenSBI's *qemu/sifive_u*
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platform should only be used with QEMU v4.1 release or before.
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The special *qemu/sifive_u* platform support will be dropped in the future
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OpenSBI release.
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Platform Options
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----------------
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The *QEMU SiFive Unleashed Machine* platform does not have any platform specific
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options.
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Executing on QEMU RISC-V 64-bit
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-------------------------------
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**No Payload Case**
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Build:
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```
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make PLATFORM=qemu/sifive_u
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```
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Run:
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```
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qemu-system-riscv64 -M sifive_u -m 256M -display none -serial stdio \
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-kernel build/platform/qemu/sifive_u/firmware/fw_payload.elf
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```
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**U-Boot as a Payload**
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Note: the command line examples here assume that U-Boot was compiled using
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the `sifive_fu540_defconfig` configuration.
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Build:
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```
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make PLATFORM=qemu/sifive_u FW_PAYLOAD_PATH=<uboot_build_directory>/u-boot.bin
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```
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Run:
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```
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qemu-system-riscv64 -M sifive_u -m 256M -display none -serial stdio \
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-kernel build/platform/qemu/sifive_u/firmware/fw_payload.elf
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```
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or
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```
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qemu-system-riscv64 -M sifive_u -m 256M -display none -serial stdio \
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-kernel build/platform/qemu/sifive_u/firmware/fw_jump.elf \
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-device loader,file=<uboot_build_directory>/u-boot.bin,addr=0x80200000
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```
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