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@@ -1,18 +1,18 @@
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QEMU RISC-V Virt Machine Platform
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=================================
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-The **QEMU RISC-V Virt Machine** is virtual platform created for RISC-V
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-software development and testing. It is also referred as
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+The **QEMU RISC-V Virt Machine** is a virtual platform created for RISC-V
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+software development and testing. It is also referred to as
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*QEMU RISC-V VirtIO machine* because it uses VirtIO devices for network,
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storage, and other types of IO.
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-To build platform specific library and firmwares, provide the
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+To build the platform-specific library and firmware images, provide the
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*PLATFORM=qemu/virt* parameter to the top level `make` command.
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Platform Options
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----------------
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-The *QEMU RISC-V Virt Machine* platform does not have any platform specific
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+The *QEMU RISC-V Virt Machine* platform does not have any platform-specific
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options.
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Execution on QEMU RISC-V 64bit
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@@ -27,7 +27,7 @@ make PLATFORM=qemu/virt
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Run:
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```
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-qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
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+qemu-system-riscv64 -M virt -m 256M -nographic \
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-kernel build/platform/qemu/virt/firmware/fw_payload.elf
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```
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@@ -43,19 +43,19 @@ make PLATFORM=qemu/virt FW_PAYLOAD_PATH=<uboot_build_directory>/u-boot.bin
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Run:
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```
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-qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
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+qemu-system-riscv64 -M virt -m 256M -nographic \
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-kernel build/platform/qemu/virt/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 virt -m 256M -display none -serial stdio \
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+qemu-system-riscv64 -M virt -m 256M -nographic \
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-kernel build/platform/qemu/virt/firmware/fw_jump.elf \
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- -device loader,file=<uboot_build_directory>/u-boot.bin,addr=0x80400000
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+ -device loader,file=<uboot_build_directory>/u-boot.bin,addr=0x80200000
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```
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**Linux Kernel Payload**
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-Note: We assume that Linux kernel is compiled using
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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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@@ -65,7 +65,76 @@ make PLATFORM=qemu/virt FW_PAYLOAD_PATH=<linux_build_directory>/arch/riscv/boot/
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Run:
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```
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-qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
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+qemu-system-riscv64 -M virt -m 256M -nographic \
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+ -kernel build/platform/qemu/virt/firmware/fw_payload.elf \
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+ -drive file=<path_to_linux_rootfs>,format=raw,id=hd0 \
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+ -device virtio-blk-device,drive=hd0 \
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+ -append "root=/dev/vda rw console=ttyS0"
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+```
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+or
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+```
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+qemu-system-riscv64 -M virt -m 256M -nographic \
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+ -kernel build/platform/qemu/virt/firmware/fw_jump.elf \
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+ -device loader,file=<linux_build_directory>/arch/riscv/boot/Image,addr=0x80200000 \
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+ -drive file=<path_to_linux_rootfs>,format=raw,id=hd0 \
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+ -device virtio-blk-device,drive=hd0 \
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+ -append "root=/dev/vda rw console=ttyS0"
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+```
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+
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+
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+Execution on QEMU RISC-V 32bit
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+------------------------------
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+
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+**No Payload Case**
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+
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+Build:
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+```
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+make PLATFORM=qemu/virt
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+```
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+
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+Run:
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+```
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+qemu-system-riscv32 -M virt -m 256M -nographic \
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+ -kernel build/platform/qemu/virt/firmware/fw_payload.elf
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+```
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+
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+**U-Boot Payload**
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+
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+Note: the command line examples here assume that U-Boot was compiled using
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+the `qemu-riscv32_smode_defconfig` configuration.
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+
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+Build:
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+```
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+make PLATFORM=qemu/virt FW_PAYLOAD_PATH=<uboot_build_directory>/u-boot.bin
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+```
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+
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+Run:
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+```
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+qemu-system-riscv32 -M virt -m 256M -nographic \
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+ -kernel build/platform/qemu/virt/firmware/fw_payload.elf
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+```
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+or
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+```
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+qemu-system-riscv32 -M virt -m 256M -nographic \
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+ -kernel build/platform/qemu/virt/firmware/fw_jump.elf \
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+ -device loader,file=<uboot_build_directory>/u-boot.bin,addr=0x80400000
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+```
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+
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+**Linux Kernel Payload**
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+
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+Note: We assume that the Linux kernel is compiled using
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+*arch/riscv/configs/rv32_defconfig* (kernel 5.1 and newer)
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+respectively using *arch/riscv/configs/defconfig* plus setting
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+CONFIG_ARCH_RV32I=y (kernel 5.0 and older).
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+
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+Build:
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+```
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+make PLATFORM=qemu/virt FW_PAYLOAD_PATH=<linux_build_directory>/arch/riscv/boot/Image
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+```
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+
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+Run:
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+```
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+qemu-system-riscv32 -M virt -m 256M -nographic \
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-kernel build/platform/qemu/virt/firmware/fw_payload.elf \
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-drive file=<path_to_linux_rootfs>,format=raw,id=hd0 \
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-device virtio-blk-device,drive=hd0 \
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@@ -73,7 +142,7 @@ qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
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```
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or
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```
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-qemu-system-riscv64 -M virt -m 256M -display none -serial stdio \
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+qemu-system-riscv32 -M virt -m 256M -nographic \
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-kernel build/platform/qemu/virt/firmware/fw_jump.elf \
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-device loader,file=<linux_build_directory>/arch/riscv/boot/Image,addr=0x80400000 \
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-drive file=<path_to_linux_rootfs>,format=raw,id=hd0 \
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