通过x86PAT表将内存设置为不可缓存-Setmemoryasuncacheablethroughx86PATtable

2  

I would recommend writing a kernel module to provide the necessary interface for a user–level process. Inside the kernel module you can use set_memory_uc to control the page attributes.

我建议编写内核模块，为用户级进程提供必要的接口。在内核模块中，您可以使用set_memory_uc来控制页面属性。

Regarding the simulator: it should be around ten to thousand times slower—not a million times—unless you simulate at the gate level. Don't forget to consider the time it takes you to write the kernel module. If it takes you a few weeks to write and debug the module you may be better off using a simulator for a one time experiment.

关于模拟器：除非你在门级进行模拟，否则它应该慢一到几千倍 - 不是一百万倍。不要忘记考虑编写内核模块所花费的时间。如果您花费几周的时间来编写和调试模块，那么最好使用模拟器进行一次性实验。

0  

According to various developers questions on ARM platforms the code would be:

根据各种开发人员在ARM平台上的问题，代码将是：

fd = open("/dev/mem", O_RDWR|O_SYNC);
uptr = mmap(addr, length, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_LOCKED, fd, off);

ref:

参考：

• http://www.linuxjournal.com/content/mmapd-physical-memory-not-updating-user-virtual
• http://www.linuxjournal.com/content/mmapd-physical-memory-not-updating-user-virtual
• http://www.linuxquestions.org/questions/linux-kernel-70/open-dev-mem-with-o_sync-instead-of-o_async-818536/
• http://www.linuxquestions.org/questions/linux-kernel-70/open-dev-mem-with-o_sync-instead-of-o_async-818536/
• http://ep-comps.com/free60/Sources/lflash.c
• http://ep-comps.com/free60/Sources/lflash.c