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platform: Drop qemu/sifive_u support
With QEMU v4.2 RISC-V changes to improve the emulation fidelity of 'sifive_u' machine, OpenSBI v0.4 / U-Boot v2019.10 / Linux kernel v5.3 images built for the SiFive HiFive Unleashed board can be used out of the box without any special hack. Hence there is no need for us to continue supporting such a special target in OpenSBI. Going forward, sifive/fu540 platform can be used on both real hardware and QEMU 'sifive_u' machine. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Anup Patel <anup.patel@wdc.com>
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@@ -8,14 +8,9 @@ OpenSBI currently supports the following virtual and hardware platforms:
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development and tests. More details on this platform can be found in the
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file *[qemu_virt.md]*.
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* **QEMU SiFive Unleashed Machine**: Platform support for the *sifive_u* QEMU
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virtual RISC-V machine. This is an emulation machine of the HiFive Unleashed
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board by SiFive. More details on this platform can be found in the file
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*[qemu_sifive_u.md]*.
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* **SiFive FU540 SoC**: Platform support for SiFive FU540 SoC used on the
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HiFive Unleashed board. This platform is very similar to the *QEMU sifive_u*
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platform. More details on this platform can be found in the file
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HiFive Unleashed board, as well as the *sifive_u* QEMU virtual RISC-V
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machine. More details on this platform can be found in the file
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*[sifive_fu540.md]*.
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* **Kendryte K210 SoC**: Platform support for the Kendryte K210 SoC used on
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@@ -35,7 +30,6 @@ template files for implementing support for a new platform. The *object.mk*,
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facilitate the implementation.
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[qemu_virt.md]: qemu_virt.md
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[qemu_sifive_u.md]: qemu_sifive_u.md
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[sifive_fu540.md]: sifive_fu540.md
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[ariane-fpga.md]: ariane-fpga.md
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[andes_ae350.md]: andes-ae350.md
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