Hello
2008/10/6 Roman Mashak romez777@gmail.com:
[skip]
On many MCUs built on arm7tdmi core (for example, SAM7 family from Atmel) the process of starting up involves remapping, i.e. 0x0 address points on ROM at reset and on RAM after remap. U-Boot usually resides in ROM storage at startup, after reset relocates itself to RAM -- should not it involve remapping as well?
I didn't find how it's done in U-Boot (if it's done at all). Would appreciate a lot for clarification.
I seem to understand that remapping, being a CPU specific and depending on a way U-Boot starts (either from ROM or RAM), is taken away in 'lowlevel_init' function, defined either in in $(uboot)/cpu/arm/$(soc)/lowlevel_init.S (for example, $(uboot)/cpu/arm920t/ks8695/) or in $(uboot)/board/board_name/lowlevel_init.S, but what confuses me is that I couldn't find remap functions on every ARM platform, running from ROM at reset.