MIPS处理器中ｆｌａｓｈ处理。功能：　

Updating the contents of Flash memory without an external programmer, requires some precau-

tion when designing code that writes/erases the same Flash memory in which it is located.

Currently, no flash memories exist that allow read cycles during a write/erase cyclus. Therefore,

the code that performs the actual write/erase of the flash memory, must reside outside the flash

memory.