mirror of
https://github.com/riscv-software-src/opensbi.git
synced 2025-08-25 15:51:41 +01:00
65c06b026d
The OpenSBI generic platform works perfectly fine on the QEMU spike machine and Spike emulator so let's remove dedicated Spike platform from OpenSBI. All Spike platform related documentation in OpenSBI will now suggest using OpenSBI generic platform. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Bin Meng <bin.meng@windriver.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
90 lines
2.0 KiB
Markdown
90 lines
2.0 KiB
Markdown
Spike Simulator Platform
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========================
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The **Spike** is a RISC-V ISA simulator which implements a functional model
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of one or more RISC-V harts. The **Spike** compatible virtual platform is
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also available on QEMU. In fact, we can use same OpenSBI firmware binaries
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on **Spike** simulator and QEMU Spike machine.
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For more details, refer [Spike on GitHub](https://github.com/riscv/riscv-isa-sim)
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To build the platform-specific library and firmware images, provide the
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*PLATFORM=generic* parameter to the top level `make` command.
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Platform Options
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----------------
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The *Spike* platform does not have any platform-specific options.
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Execution on Spike Simulator
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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=generic
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```
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Run:
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```
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spike build/platform/generic/firmware/fw_payload.elf
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```
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**Linux Kernel Payload**
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Note: We assume that the Linux kernel is compiled using
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*arch/riscv/configs/defconfig*.
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Build:
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```
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make PLATFORM=generic FW_PAYLOAD_PATH=<linux_build_directory>/arch/riscv/boot/Image
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```
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Run:
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```
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spike --initrd <path_to_cpio_ramdisk> build/platform/generic/firmware/fw_payload.elf
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```
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Execution 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=generic
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```
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Run:
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```
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qemu-system-riscv64 -M spike -m 256M -nographic \
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-kernel build/platform/generic/firmware/fw_payload.elf
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```
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**Linux Kernel Payload**
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Note: We assume that the Linux kernel is compiled using
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*arch/riscv/configs/defconfig*.
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Build:
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```
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make PLATFORM=generic FW_PAYLOAD_PATH=<linux_build_directory>/arch/riscv/boot/Image
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```
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Run:
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```
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qemu-system-riscv64 -M spike -m 256M -nographic \
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-kernel build/platform/generic/firmware/fw_payload.elf \
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-initrd <path_to_cpio_ramdisk> \
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-append "root=/dev/ram rw console=hvc0 earlycon=sbi"
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```
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or
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```
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qemu-system-riscv64 -M spike -m 256M -nographic \
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-bios build/platform/generic/firmware/fw_jump.elf \
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-kernel <linux_build_directory>/arch/riscv/boot/Image \
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-initrd <path_to_cpio_ramdisk> \
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-append "root=/dev/ram rw console=hvc0 earlycon=sbi"
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```
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