#include "riscv.h" #include "defs.h" void main(); void timerinit(); // entry.S needs one stack per CPU. __attribute__ ((aligned (16))) char stack0[4096 * NCPU]; // a scratch area per CPU for machine-mode timer interrupts. uint64 timer_scratch[NCPU][5]; // assembly cod...
Code Issues Pull requests Solution to MIT 6.828 Fall19, with lab report at https://blog.mky.moe/mit6828/menu/ xv6-riscv Updated Jul 31, 2021 C ejunjsh / myxv6 Star 15 Code Issues Pull requests xv6 riscv operating system and labs from mit 6.S081 2020 c filesystem ...
#include"riscv.h" #include"defs.h" voidmain(); voidtimerinit(); // entry.S needs one stack per CPU. __attribute__ ((aligned (16)))charstack0[4096* NCPU]; // a scratch area per CPU for machine-mode timer interrupts. uint64 timer_scratch[NCPU][5]; // assembly code in kernel...
由于risc好像不支持pause指令,或者说没有一个相关功能的指令,所以就参考了glibc的spinlock pthread_spin_lock.c - nptl/pthread_spin_lock.c - Glibc source code glibc-2.40.9000 - Bootlin int __pthread_spin_lock (pthread_spinlock_t *lock) { int val = 0; /* We assume that the first try mostly...
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xv6riscv是一个基于RISC-V指令集架构的操作系统,它是xv6操作系统的一个变种。xv6是一个教学用的UNIX类操作系统,旨在帮助学生理解操作系统的设计和实现原理。xv6riscv保留了xv6的设计理念和结构,但将其移植到了RISC-V架构上。xv6riscv具有简洁、清晰的代码结构,易于理解和学习。它实现了操作系统的核心功能,包括进程...
// On RISC-V, this emits a fence instruction. __sync_synchronize(); // Record info about lock acquisition for holding() and debugging. lk->cpu = mycpu(); } spinlock需要处理两类并发,一类是不同CPU之间的并发,一类是相同CPU上中断和普通程序之间的并发。针对后一种情况,我们需要在acquire中关闭中...
当risc-v 计算机上电时,它自身初始化,并运行一个引导加载器(存储在 ROM 中)。引导加载器装载 xv6 的内核到内存的0x8000000开始的存储空间中。然后在 machine mode 下, CPU 从kernel/entry.s的_entry处开始执行指令。xv6 启动时页设备是禁用的,所以虚拟内存地址直接映射到物理内存地址。不从0x0开始是因为0~0x...
PATH=$PATH:/usr/local/opt/riscv-gnu-toolchain/bin before sourcing it or open a new interactive session. Then make qemu under xv6-riscv just ran! So I would suggest you go back and check if you've finished each step: install toolchain, update env vars, source, and make. Sh...
MIT 6.S081 (BOOK-RISCV-REV1)教材第四章内容 --Trap -- 中 我们可以看到,用户代码sh.c初始了这一切: 在一个窗口执行make qemu-gdb命令启动xv6调试模式 在另一个窗口指令gdb-multiarch kernel/kernel命令,...进行gdb调试 如何debug xv6详细可参考该文优雅的调试—在vscode上完美调试xv6(完结) 用户代码的S...