如何彻底暂停处理器？ [英] How to completely suspend the processor?

问题描述

我正在写一个基于x86的PC小引导程序。问题是CPU在执行这些指令后莫名其妙地仍然有效：

I'm writing a small bootloader for an x86 based PC. The problem is that the CPU is somehow still active after executing these instructions:

sti
hlt

STI 应该禁止中断的下一条指令结果
HLT 应该完全停止处理器

sti is supposed to disable interrupts for the next instruction
hlt is supposed to completely halt the processor

由于它们一起使用时，我以为他们只会冻结计算机。但是，当我组装它并将它安装在VirtualBox中的软盘映像，我的CPU跳转到100％。

Since they're used together, I assumed they would just 'freeze' the computer. But when I assemble it and mount it in VirtualBox as a floppy image, my CPU jumps to 100%.

我在做什么错了？

推荐答案

我觉得你是一个有点困惑这两个命令。

I think you are a bit confused about both of these commands.

的 STI 命令启用中断和CLI命令禁用它们。

The sti command enables interrupts and the cli command disables them.

暂停状态类似于一个空闲循环，因此不会暂停处理器。

The halt state is similar to an idle loop, so it doesn't suspend the processor.

下面有一些链接，可以帮助你：
在STI / CLI命令的信息：<一href=\"http://en.wikipedia.org/wiki/STI_%28x86_instruction%29\">http://en.wikipedia.org/wiki/STI_%28x86_instruction%29

Here are some links that may help you: Info on the STI/CLI commands: http://en.wikipedia.org/wiki/STI_%28x86_instruction%29

信息上的x86指令：<一href=\"http://en.wikipedia.org/wiki/X86_instruction_listings\">http://en.wikipedia.org/wiki/X86_instruction_listings
从这里有到 HLT 命令，可以帮助的链接。

Info on the x86 instructions: http://en.wikipedia.org/wiki/X86_instruction_listings From here there is a link to the hlt command that may help.

如果您暂停处理器，你怎么又来唤醒它，如果禁用中断？

If you suspend the processor, how do you wake it up again, if you disable the interrupts?

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