参考: https://github.com/u-boot/u-boot/blob/master/doc/board/emulation/qemu-riscv.rst
步骤:
1. 准备gcc & qemu
2. 克隆 u-boot 代码:
git clone https://github.com/u-boot/u-boot
或者用这个加速地址:
git clone https://hub.fastgit.org/u-boot/u-boot
3. 编译 u-boot
cd u-boot
make qemu-riscv64_defconfig
CROSS_COMPILE=riscv64-linux-gnu- make
4. qemu运行u-boot.bin
qemu-system-riscv64 -nographic -machine virt -bios u-boot
$ qemu-system-riscv64 -nographic -machine virt -bios u-boot
U-Boot 2021.07-rc3-00070-gc003d2cd6b (Jun 06 2021 - 09:19:12 +0800)
CPU: rv64imafdcsu
Model: riscv-virtio,qemu
DRAM: 128 MiB
Loading Environment from nowhere... OK
In: uart@10000000
Out: uart@10000000
Err: uart@10000000
Net: No ethernet found.
Hit any key to stop autoboot: 0
Device 0: unknown device
scanning bus for devices...
Device 0: unknown device
No ethernet found.
No ethernet found.
=> printenv
arch=riscv
baudrate=115200
board=qemu-riscv
board_name=qemu-riscv
boot_a_script=load ${devtype} ${devnum}:${distro_bootpart} ${scriptaddr} ${prefix}${script}; source ${scriptaddr}
boot_efi_binary=load ${devtype} ${devnum}:${distro_bootpart} ${kernel_addr_r} efi/boot/bootriscv64.efi; if fdt addr ${fdt_addr_r}; then bootefi ${kernel_addr_r} ${fdt_addr_r};else bootefi ${kernel_addr_r} ${fdtcontroladdr};fi
boot_efi_bootmgr=if fdt addr ${fdt_addr_r}; then bootefi bootmgr ${fdt_addr_r};else bootefi bootmgr;fi
boot_extlinux=sysboot ${devtype} ${devnum}:${distro_bootpart} any ${scriptaddr} ${prefix}${boot_syslinux_conf}
boot_pci_enum=pci enum
....离线
1. 克隆opensbi源码:
git clone https://github.com/riscv/opensbi
git clone https://hub.fastgit.org/riscv/opensbi
2. 编译:
cd opensbi
CROSS_COMPILE=riscv64-linux-gnu- make PLATFORM=generic
3. qemu运行:
qemu-system-riscv64 -M virt -m 256M -nographic -bios build/platform/generic/firmware/fw_payload.bin
日志:
$ qemu-system-riscv64 -M virt -m 256M -nographic -bios build/platform/generic/firmware/fw_payload.bin
OpenSBI v0.9-64-gf30b189
____ _____ ____ _____
/ __ \ / ____| _ \_ _|
| | | |_ __ ___ _ __ | (___ | |_) || |
| | | | '_ \ / _ \ '_ \ \___ \| _ < | |
| |__| | |_) | __/ | | |____) | |_) || |_
\____/| .__/ \___|_| |_|_____/|____/_____|
| |
|_|
Platform Name : riscv-virtio,qemu
Platform Features : mfdeleg
Platform HART Count : 1
Platform IPI Device : clint
Platform Timer Device : clint
Platform Console Device : uart8250
Platform HSM Device : ---
Platform SysReset Device : sifive_test
Firmware Base : 0x80000000
Firmware Size : 112 KB
Runtime SBI Version : 0.3
Domain0 Name : root
Domain0 Boot HART : 0
Domain0 HARTs : 0*
Domain0 Region00 : 0x0000000002000000-0x000000000200ffff (I)
Domain0 Region01 : 0x0000000080000000-0x000000008001ffff ()
Domain0 Region02 : 0x0000000000000000-0xffffffffffffffff (R,W,X)
Domain0 Next Address : 0x0000000080200000
Domain0 Next Arg1 : 0x0000000082200000
Domain0 Next Mode : S-mode
Domain0 SysReset : yes
Boot HART ID : 0
Boot HART Domain : root
Boot HART ISA : rv64imafdcsu
Boot HART Features : scounteren,mcounteren,time
Boot HART PMP Count : 16
Boot HART PMP Granularity : 4
Boot HART PMP Address Bits: 54
Boot HART MHPM Count : 0
Boot HART MHPM Count : 0
Boot HART MIDELEG : 0x0000000000000222
Boot HART MEDELEG : 0x000000000000b109
Test payload running离线