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

cache not enable

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

SOCFPGA DWMMC: 0

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?

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    7 years ago

    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 https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/hb/external-memory/emi_ip.pdf sections 17.4 and 17.5 for more information on how to debug calibration failures.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    7 years ago

    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.

    • TSege1's avatar
      TSege1
      Icon for New Contributor rankNew Contributor
      4 years ago

      Hi,

      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?

      Thanks!