Where to change in files for memory

[srinivasaporam]

Hi,

We have got custom board which is designed based on reference design, but differing in memory capacity and type.

Reference design memory capacity 1024MB (1GB) where as our customized board capacity is 512MB. Where will we edit or change these values for u-boot customization.

our u-boot code config files (include/configs/xyz_board.h) has the following:

/* Physical Memory Map */

#define CONFIG_NR_DRAM_BANKS        1

#define PHYS_SDRAM            MMDC0_ARB_BASE_ADDR

#define CONFIG_SYS_SDRAM_BASE        PHYS_SDRAM

#define CONFIG_SYS_INIT_RAM_ADDR    IRAM_BASE_ADDR

#define CONFIG_SYS_INIT_RAM_SIZE    IRAM_SIZE    //#define IRAM_SIZE 0x00040000

#define CONFIG_SYS_INIT_SP_OFFSET \

    (CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)

#define CONFIG_SYS_INIT_SP_ADDR \

    (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)

[srinivasaporam]

Hi,

this i have referred several times, but our board is not booting.

I have following Queries:

1. We are trying for u-boot customization in two ways (1) we are using yocto project  and (2) u-boot downloaded from das-u-boot git repo. in both ways we are failing.

2. We are cross verifying both yocto uboot and das uboot. in das uboot we have got two files (spl.c and wandboard.c) for reference board. in spl.c is doing spl-dram-init, checking for memory type, density no.of chip selects etc. in yocto project where they are being done.

[BiyongSUN]

In the stage, it doesn't need to modify the code you mentioned. But need to do the DDR calibration.

Have you  apply the ddr calibration result in uboot?

i.MX6/7 DDR Stress Test Tool V2.20

[Yuri]

Hello,

Please refer to  Chapter 1 (Porting U-Boot from an i.MX 6/7 Reference
Board to an i.MX 6/7 Custom Board) of “i.MX_BSP_Porting_Guide.pdf” in
FSL Linux documentation.

http://www.freescale.com/webapp/Download?colCode=L3.14.38_6UL_LINUX_DOCS

Have a great day,
Yuri

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