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why is there TLB entry for CCSRBAR

Question asked by t.alex on Apr 25, 2014
Latest reply on Apr 27, 2014 by LPP



In u-boot when displaying the registers, I saw an entry for CCSRBAR:


entry 01: V: 1 EPN 0xfe000000 RPN 0xffe000000 size:16 MiB


and u-boot code does add this entry using the macros CONFIG_SYS_CCSRBAR_DEFAULT(0xFE00_0000) and CONFIG_SYS_CCSRBAR_PHYS(0xF_FE00_0000).


Why is there a need for this? Based on the reference manual, all we need to do is to set a base value for CCSRBAR.


Address 0XF_FE00_0000 seems to have no defined global ID.