Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

the sequence of boot in NIos II based HAL

I had read the boot modes of NIos II ,I want to know the boot sequence of Nios II based HAL,In the doucount of Altera,It said that if boot without boot_loader ,the crt0.s deal with boot ,see crt0.s...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Hi gerger,

> I wonder the flush Icache is same with crt0.S?and when to call boot_loader?

I'm not sure I understand your question exactly, but both the boot loader

and crt0 initialize the icache. The last time I checked, the loader does not

initialize dcache ... it just uses the ld/st io instructions.

> In addition .what is the BSS region

Uninitialized data ... the stuff that is supposed to be set to zero before

calling main().

Regards,

--Scott