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Update Multiboot register from userspace (linux)

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Observer
Posts: 20
Registered: ‎05-12-2014

Update Multiboot register from userspace (linux)

Hi,

 

simple question: In terms of multiboot i wanted to know if its possible to modify / update the multiboot register, so that the BootROM will search the FSBL at a given offset address?

 

Thanks and best regards

Jan

Moderator
Posts: 104
Registered: ‎05-02-2017

Re: Update Multiboot register from userspace (linux)

hi @jan.budroweit,

 

When Fallback occurs, an internally generated pulse resets the entire configuration logic, except for the dedicated MultiBoot logic, the warm boot start address (WBSTAR) register, and the boot status (BOOTSTS) registers. This reset pulse pulls INIT_B and DONE Low, clears the configuration memory, and restarts the configuration process from address 0 of the flash memory device.

 

thanks

sekhar