Re: [U-Boot] [PATCH] Make flash protection work, when the environment is in EEPROM

Dear Jon Smirl,

In message 9e4733910903211308v63878fabx19f3327371db56c6@mail.gmail.com you wrote:

My guess is getenv() returns a pointer to the environment variable, not a copy of the environment variable. getenv_r() returns a copy. How can you return a pointer to the variable if the variable is in something not directly addressable like EEPROM? Does

The environment always gets copied to RAM. And it's a perfectly simple thing to return an adress pointing to some memory in RAM :-)

getenv("unlock"); do what you want when the environment is in EEPROM?

getenv() always works that way, no matter which actual media is used for the persistent storage of the environment.

Best regards,

Wolfgang Denk