Linux_Drivers/opensbi/docs/platform/spike.md

Spike Simulator Platform

The Spike is a RISC-V ISA simulator which implements a functional model of one or more RISC-V harts. The Spike compatible virtual platform is also available on QEMU. In fact, we can use same OpenSBI firmware binaries on Spike simulator and QEMU Spike machine.

For more details, refer Spike on GitHub

To build the platform-specific library and firmware images, provide the PLATFORM=generic parameter to the top level make command.

Platform Options

The Spike platform does not have any platform-specific options.

Execution on Spike Simulator

No Payload Case

Build:

make PLATFORM=generic

Run:

spike build/platform/generic/firmware/fw_payload.elf

Linux Kernel Payload

Note: We assume that the Linux kernel is compiled using arch/riscv/configs/defconfig.

Build:

make PLATFORM=generic FW_PAYLOAD_PATH=<linux_build_directory>/arch/riscv/boot/Image

Run:

spike --initrd <path_to_cpio_ramdisk> build/platform/generic/firmware/fw_payload.elf

Execution on QEMU RISC-V 64-bit

No Payload Case

Build:

make PLATFORM=generic

Run:

qemu-system-riscv64 -M spike -m 256M -nographic \
	-bios build/platform/generic/firmware/fw_payload.elf

Linux Kernel Payload

Note: We assume that the Linux kernel is compiled using arch/riscv/configs/defconfig.

Build:

make PLATFORM=generic FW_PAYLOAD_PATH=<linux_build_directory>/arch/riscv/boot/Image

Run:

qemu-system-riscv64 -M spike -m 256M -nographic \
	-bios build/platform/generic/firmware/fw_payload.elf \
	-initrd <path_to_cpio_ramdisk> \
	-append "root=/dev/ram rw console=hvc0 earlycon=sbi"

or

qemu-system-riscv64 -M spike -m 256M -nographic \
	-bios build/platform/generic/firmware/fw_jump.elf \
	-kernel <linux_build_directory>/arch/riscv/boot/Image \
	-initrd <path_to_cpio_ramdisk> \
	-append "root=/dev/ram rw console=hvc0 earlycon=sbi"