PowerQUICC ProcessorsのトピックRe: Hungup during U-Boot

Hungup during U-Boot

okernytskyy — Thu, 07 Sep 2017 16:12:31 GMT

I am investigating field failure and product with MPC8314E processor hung up at the beginning of U-Boot process.

Debugging over the serial port indicates DRAM: 512 MiB (DDR2, 32-bit, ECC off, 266.667 MHz).

Process stopped after this line.

An actual DRAM has 4GB size - 2 ICs p/n MT47H128M16RT-25E from Micron Technologies.

Can it cause the problem, and why DRAM size displayed incorrectly (512 MB instead of 4 GB)?

Copy of debugging screen shot it attached.

NOR FLASH memory with U-Boot image (p/n S29GL256N) has correct supply voltage, and signals CE and OE are seems OK.

What other troubleshooting steps/tools can I use to debug this failure?

Re: Hungup during U-Boot

alexander_yakov — Fri, 08 Sep 2017 11:47:06 GMT

Please specify which Linux BSP you are using, and where it was obtained from.

Have a great day,
Alexander
TIC

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Re: Hungup during U-Boot

okernytskyy — Tue, 12 Sep 2017 15:20:45 GMT

The Linux was from https://www.yoctoproject.org

Re: Hungup during U-Boot

okernytskyy — Wed, 13 Sep 2017 16:49:51 GMT

Please note the above is 512 M Bytes. Then the 4Gb is bits. 4Gb/8=512MiB.

Re: Hungup during U-Boot

alexander_yakov — Thu, 14 Sep 2017 01:50:39 GMT

Your log shows Uboot 2013.07, this is quite new version, for MPC8315/MPC8314 family processors we offer U-Boot Version: "2009.03-rc2 plus Freescale patches" in our official Linux BSP.

Please look DDR memory-related settings in your U-boot configuration.