xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix Version 6 (v6). xv6 loosely follows the structure and style of v6, but is implemented for a modern RISC-V multiprocessor using ANSI C. ACKNOWLEDGMENTS xv6 is inspired by John Lions's Commentary on UNIX 6th Edition (...
当计数器到达0,pop_off恢复存在于最外层临界区开始处的中断开启状态。intr_off以及intr_off以及intr_on函数执行RISC-V指令以分别禁用和启用中断。 voidacquire(structspinlock*lk){push_off();// disable interrupts to avoid deadlock.if(holding(lk))panic("acquire");while(__sync_lock_test_and_set(&lk->...
完成以上设置后,通过mret指令就可以跳转到 main 函数执行,同时切换到 S 态。 查看qemu 启动参数,qemu-system-riscv64 -machine virt -bios none -kernel kernel/kernel -m 128M -smp 3 -nographic -global virtio-mmio.force-legacy=false -drive file=fs.img,if=none,format=raw,id=x0 -device virtio-...
code:https://github.com/mit-pdos/xv6-riscv book:https://pdos.csail.mit.edu/6.828/2021/xv6/book-riscv-rev2.pdf note:https://mit-public-courses-cn-translatio.gitbook.io/mit6-s081/
Exercise 1 RISC-V assembly 执行make fs.img,编译user/call.c生成user/call.asm。 阅读call.asm,回答以下问题: 1. Which registers contain arguments to functions? For example, which register holds 13 in main's call to printf? 2. Where is the call to function f in the assembly code for main...
BUILDING AND RUNNING XV6 You will need a RISC-V "newlib" tool chain from https://github.com/riscv/riscv-gnu-toolchain, and qemu compiled for riscv64-softmmu. Once they are installed, and in your shell search path, you can run "make qemu". ...
这个系列的目的还是以讲解xv6-riscv的代码以及记录我在做的事情为主,也会掺杂许多mini-riscv-os的代码介绍(关于xv6-riscv和mini-riscv-os的链接请看参考),并非教程倾向(但也会尽可能讲解一些基础知识),很多细节不会讲到。如果想要更详细的教程我建议你查看参考资料中
XV6基于Sv39 RISC-V运行,这意味着它只使用64位虚拟地址的低39位,高25位不使用。虚拟地址的前27位用于索引页表,页表在逻辑上视作由 227个页表条目(PTE)组成的数组,每个PTE中包含一个44位的物理页码(PPN),以及一些控制和状态的标志位。 地址转换过程:处理一个虚拟地址时,使用该虚拟地址的前27位在页表中查找对...
源码GitHub连接：GitHub - mit-pdos/xv6-riscv: Xv6 for RISC-Vgithub.com/mit-pdos/xv6-risc...
RISC-V GCC 编译链:riscv-gnu-toolchain 下载 gitclonehttps://github.com/HUST-OS/xv6-k210 在k210 开发板上运行 首先您需要连接k210开发板到电脑,然后检查 USB 端口: ls /dev/ | grep USB 在我的机器上的情况是将会显示ttyUSB0,这就是 USB 端口。