Detailed explanation on how RISC-V boot process works and what role SBI has in the RISC-V software stack. Concrete example with OpenSBI.

本人之前正在学习清华大学的uCore操作系统教程，正好看到Milkv-duo这块Riscv开发板，正好可以用来提供一个真实的硬件环境来运行自己写的操作系统程序。 根据芯片的官方文档，CV1800b 在启动时会在 FAT32 分区中寻找 fip.bin 文件，引导其中的 bl2->opensbi->uboot，uboot 再去引导 boot.sd。 最开始我想的是将自己的 kernel 替换 uboot（即放在 LOADER_2ND 的位置），直接从 opensbi 跳转进来，但在编译 fip.bin…

I just started using c++ bindings of libgpiod library and have problem with settings gpios. I know, that I can create long vector of values, and apply it in all at once, but I would like to be able...

Yet Another Programming Blog :-)

this has been bugging me all day. When a program sets itself up to call a function when it receives a certain interrupt, I know that the registers are pushed onto the stack when the program is

This article dives into the depts of the Linux Kernel's watchdog and how it handles soft and hard lockups.

I was reading Critical Section Problem from Operating System Concepts by Peter B. Galvin.
According to it

1) Progress is : If no process is executing in its critical section and some processes wi...

I try to understand the difference between the congestion window and the receive window.
As I understand it, the receiver window is a buffer where the receiver can get the packets. The same is true...

Say I just create directory newDirectory and then I do ls -ld command. I see that the number of hard links is 2. What exactly makes the hard link 2 from the start? Also is the number of subdirector...

I need to create folder if it does not exists, so I use:

bool mkdir_if_not_exist(const char *dir)
{
bool ret = false;
if (dir) {
// first check if folder exists
struct stat folder_in...

This article describes the no ip domain-lookup command, which is used to disable the DNS translation process in Cisco IOS.

IP classless的作用：1、ip classless这条命令是作用于路由转发进程的，告诉路由器工作在无类环境下2、它能让路由器超越有类网络的边界而根据最长匹配条目来转发数据包；3、当目的网络没有出现在路由表中时通过默认路由转发数据包，而不是简单的丢弃4、如果路由器工作在有类环境下，当目的网络

I'm trying to tweak the sensitivity of a joystick which does not work correctly with SDL, using the EVIOCSABS call from input.h. I think that the fuzz and flat members of the input_absinfo struct ...