port-arm32/50153: 1G/3G split

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>Number:         50153
>Category:       port-arm32
>Synopsis:       1G/3G split
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-arm32-maintainer
>State:          open
>Class:          support
>Submitter-Id:   net
>Arrival-Date:   Tue Aug 18 18:30:00 +0000 2015
>Originator:     senthil
>Release:        5.1
>Organization:
aricent
>Environment:
>Description:
i am trying to fit the 2g ddr physical memory in processor address space in bc53xx arm board.i changed KERNEL_BASE_VIRT=0x40100000,KERNEL_BASE_PHY=0x60100000 and KERNEL_BASE_EXT=0x40000000.

Kernel is booting up.After mounting the filesystem.I am getting the below error.

MMAp(2) failed,check limits continously.

is there any way overcome the issue?
>How-To-Repeat:

>Fix: