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An emulator to run mips executable and to differentially validate noop.

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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

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An emulator to run mips executable and to differentially validate noop.

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