MIPS32-NEMU

与noop同步的模拟器

内存映射

MIPS32-NPC中的内存映射定义如下（来自nexus-am/am/arch/mips32-npc/README.md）：

0xbfc00000 - 0xbfcfffff: BRAM
0x80000000 - 0x8fffffff: DDR (cached)
0xa0000000 - 0xafffffff: DDR (uncached)
0xb0000000 - 0xb0000fff: GPIO-trap
0xbfe94000 - 0xbfe94fff: Keyboard
0xbff00000 - 0xbff0ffff: Mac (almost completed)
0xbfe95000 - 0xbfe95fff: PerfCounter
0xb0002000 - 0xb0002fff: RTC
0xb0003000 - 0xb0003fff: screen config
0xbfe50000 - 0xbfe50fff: uartlite serial
0xbfe80000 - 0xbfe80fff: spi flash
0xb0400000 - 0xb04fffff: video memory

编译与运行

配置nemu-mips32
- make menuconfig, 手动配置
- make xx_defconfig, 使用缺省配置
编译
- make
运行elf文件
- build/nemu -b -e xx.elf
运行binary文件
- build/nemu -b -i xx.elf
调试elf文件，请先安装gdb-multiarch
- build/nemu -e xx.elf

linux

how to run linux on nemu-mips32 ?
- git clone https://github.com/nju-mips/minilab -b run-linux
- cd minilab && git clone https://github.com/nju-mips/nemu-mips32 nemu -b M2
- cd M2 && make run

configs

make microbench_defconfig,专门为microbench优化的配置，暂时不可用
make mips32r1_defconfig，运行linux/debian所用的配置，没有窗口，跑不了microbench
make noop_defconfig,用于和noop/woop差分测试的配置，可以运行microbench

linux configs

ARCH=mips make noop_debian_defconfig，运行debian的，有完整的网络栈，镜像比较大
ARCH=mips make noop_defconfig，用来在noop/woop上差分测试的镜像
ARCH=mips make noop_emu_defconfig，同上，不过大小非常小，用来快速验证
ARCH=mips make noop_spi_defconfig，启用了spi，可以从spi flash启动busybox/systemd
ARCH=mips make noop_legacy_boot_defconfig，可以在命令行指定initrd的地址，进而启动1号进程