[U-Boot] Wrong RAM Size on Devkit8000

[Maxime Ripard <maxime.ripard@free-electrons.com>]

Hi,

I'm currently testing u-boot 2013.04 with SPL on a Devkit8000 with 256MB
of RAM.

Trouble is, it only detects 128MB of RAM. The x-loader found on the NAND
detects 256MB and works perfectly with it.

I obviously tried to change the mcfg field of the timings structure to
be at MICRON_V_MCFG_165(256 << 20), however, while it obviously detects
256MB of RAM, it then crashes quite badly when booting to a userspace
(and actually using that much RAM I guess). It works perfectly fine
though with only 128MB of RAM, so I think the timings are ok.

-- Boot from the NAND, with stock uboot/x-loader from TimLL -----------
X-Loader 1.41
Starting OS Bootloader...


U-Boot 1.3.3-svn (Mar 16 2012 - 17:38:47)

OMAP3530-GP rev 2, CPU-OPP2 L3-165MHz
OMAP3 DevKit8000 Board + LPDDR/NAND
DRAM:  256 MB
NAND:  512 MiB
Using default environment

In:    serial
Out:   serial
Err:   serial
Hit space key to stop autoboot:  0


-- Boot from the MMC, using vanilla u-boot 2013.04 ---------------------
U-Boot SPL 2013.04 (May 14 2013 - 16:12:21)
OMAP SD/MMC: 0
reading u-boot.img
reading u-boot.img


U-Boot 2013.04 (May 14 2013 - 16:12:21)

OMAP3530-GP ES3.1.2, CPU-OPP2, L3-165MHz, Max CPU Clock 600 MHz
OMAP3 DevKit8000 + LPDDR/NAND
I2C:   ready
DRAM:  128 MiB
NAND:  512 MiB
MMC:   OMAP SD/MMC: 0
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
ethaddr not set, using Die ID
Die ID #5910000700000000015470c40101a01e
Net:   dm9000
Hit any key to stop autoboot:  0

Any ideas on how to solve this?

Thanks,
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com