PowerQUICC ProcessorsのトピックRe: MPC8548 U boot Porting

MPC8548 U boot Porting

systick — Tue, 27 Mar 2018 16:21:57 GMT

I got the Sbc8548 board, I working on Sbc8548 Linux porting for my master thesis but I ve some issues ;

- We set the cfg_rom_loc pins for Nor Flash,
- We use the powerpc-openwrt-linux-musl- toolchain for build,
- When I compile U-Boot and install to board its go to the "infinite_debug_loop"(0xfffff2d0) functions what is the reason of this situation
- Is it registers configuration could be wrong or I did miss something,

I look forward to hearing from you

Yours Sincerely,

Re: MPC8548 U boot Porting

alexander_yakov — Wed, 28 Mar 2018 01:37:20 GMT

"infinite debug loop" means your U-boot can not find CCSR space at place it expects it should be.

This means incorrect CCSR setting. The following comment is present in U-boot source code:

    /*
   * If the value we read from CCSRBARL is not what we expect, then
   * enter an infinite loop. This will at least allow a debugger to
   * halt execution and examine TLBs, etc. There's no point in going
   * on.
   */
infinite_debug_loop:
    bne   infinite_debug_loop

Have a great day,
Alexander
TIC

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Re: MPC8548 U boot Porting

systick — Wed, 28 Mar 2018 05:42:59 GMT

Mr.Yakolev first of all thank you for response,

II set the memory and pass the infinite_debug_loop, right now I got the another problem, code jump to InstructionTLBError function, I will check the Tlb codes but maybe you have advice for this subject, I am open to suggestions.

Yours Sincerely,

Re: MPC8548 U boot Porting

alexander_yakov — Wed, 28 Mar 2018 11:47:13 GMT

I suggest creating a new topic, just to keep information in our database in correct order - TLB error does not seem to be related to the initial topic. Also please submit more technical details - which particular address you are trying to access when getting TLB error, and how this particular address is configured in your MMU settings. Usually TLB error means incorrect MMU settings for the address you are trying to access.

Re: MPC8548 U boot Porting

systick — Thu, 29 Mar 2018 06:41:10 GMT

Thanks for your help Mr.Yakovlev, I gonna create new topics with

Your Sincelery