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cache not enable

Honored Contributor II

Dear all, 


I have some questions about the U-boot. The hardware board is designed by myself. The SoC is 10AS016E4F27E3SG. 


I run the Bootloader on the board and print the following information: 


U-Boot 2014.10 (Apr 20 2018 - 13:44:44) 



CPU : Altera SOCFPGA Arria 10 Platform 

BOARD : Altera SOCFPGA Arria 10 Dev Kit 

I2C: ready 

DRAM: WARNING: Caches not enabled 


FPGA: writing output_file.rbf ... 

Full Configuration Succeeded. 

emif_reset interrupt acknowledged 

emif_reset interrupt acknowledged 

emif_reset interrupt acknowledged 

Error: Could Not Calibrate SDRAM 

DDRCAL: Failed 

INFO : Skip relocation as SDRAM is non secure memory 

Reserving 2048 Bytes for IRQ stack at: ffe386e8 

DRAM : 0 Bytes 

data abort 

pc : [<ffe001cc>] lr : [<ffe024cd>] 

sp : ffe3fff0 ip : 00000016 fp : 00000001 

r10: ffd02078 r9 : ffe38ee8 r8 : ffe00000 

r7 : ffe20444 r6 : 00000000 r5 : 00000000 r4 : ffeff000 

r3 : ffe38faf r2 : ffe40000 r1 : ffe3b000 r0 : ffe38ee8 

Flags: nzcv IRQs on FIQs on Mode SVC_32 

Resetting CPU ... 



resetting ... 


Why is the cache not enabled?
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3 Replies
Honored Contributor II

I'm not sure not having the cache enable at such an early point in the boot process is really a problem. I think the real problem is the SDRAM calibration that failed. You can compile a new version of the preloader wich will give you more output on the calibration process and where it fails, by changing the RUNTIME_CAL_REPORT to 1 in uboot-socfpga/board/altera/socfpga/sdram/sequencer_defines.h and recompiling it. 

Have a look at sections 17.4 and 17.5 for more information on how to debug calibration failures.
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Honored Contributor II

Thank you very much for your reply.I changed RUNTIME_CAL_REPORT to 1 according to your method&#65292;but I could not also calibrate SDRAM.The error message is consistent.I found that I didn't place the PLL reference clock pin in the address/command bank.Through the reference design I found that the PLL-ref-clock should be a differential clock,but I didn't connect the differential clock outside BANK 2K( address/command bank).Is this the reason twhy I can't calibrate DDR?In this case, what suggestions can be set to generate pll_ref_clk clock, so as to achieve the DDR3 read and write control.

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I am also have the same problem with emif_reset message on Arria 10 U-boot with DDR4

I also  changed RUNTIME_CAL_REPORT to 1, and i dont see debug printing.

 did you managed to get the debug printing on U-boot?

can you advice?



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