CR0
Protected-Mode Enable (PE) Bit. Bit 0. PE=0,表示CPU处于实模式; PE=1表CPU处于保护模式,并使用分段机制。
Paging Enable (PG) Bit. Bit 31. 该位控制分页机制,PG=1,启动分页机制;PG=0,不使用分页机制。
CR2
存放发生页错误时的虚拟地址,格式如下:
Page-Level Writethrough (PWT) Bit. Bit 3. Page-level writethrough indicates whether the highest-
level page-translation table has a writeback or writethrough caching policy. When PWT=0, the table
has a writeback caching policy. When PWT=1, the table has a writethrough caching policy.
Page-Level Cache Disable (PCD) Bit. Bit 4. PCD=1,表示最高目录表不可缓存,PCD=0,相反。