question about bootargs

I am sorry, the pic down't show.

first cmdlice:
console=ttyO2,115200n8 notifyk.vpssm3_sva=0xBF900000 rootwait root=ubi0:rootfs ubi.mtd=3 rootfstype=ubifs rw mem=300M@0x80000000 mem=128M@0x9FC00000 vmalloc=500M earlyprink vram=70M ti816xfb.vram=0:16M,1:16M,2:6M ip=off noinitrd user_debug=31

root@dm816x-evm:~# ./loadmodules.sh
insmod: error inserting 'syslink.ko': -1 File exists
CMEMK module: built on Jan 29 2013 at 09:28:05
Reference Linux version 2.6.37
File /usr/local/ezsdk/5_05/component-sources/linuxutils_3_22_00_02/packages/ti/sdo/linuxutils/cmem/src/module/cmemk.c
CMEMK Error: CMEM phys_start (0x92c00000) overlaps kernel (0x80000000 -> 0x92C00000)
insmod: error inserting 'cmemk.ko': -1 Invalid parameters

root@dm816x-evm:~# cat loadmodules.sh
#!/bin/sh
#
# Copyright (c) 2009, Texas Instruments Incorporated
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# * Neither the name of Texas Instruments Incorporated nor the names of
# its contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#firmware_loader 0 dm81xx_c6xdsp_debug.xe674 stop
#
# Assumed Memory Map
#
# Start Addr Size Description
# -------------------------------------------
# 0x40200000 60 KB CMEM (internal memory, see comment below)
# 0x80000000 128 MB Linux
# 0x88000000 16 MB CMEM (external memory)
# 0x8B000000 24 MB DDR3_DSP (BIOS, Codecs, Applications)
# 0x8C800000 8 MB DDRALGHEAP (for C674 DSP)
# 0x8D000000 12 MB DDR3_SR1 (Ipc)
# 0x8DC00000 2 MB DDR3_HDVPSS (M3)
# 0x8DE00000 2 MB DDR3_V4L2
# 0x8E000000 16 MB DDR3_SR0 (SysLink)
# 0x8F000000 8 MB DDR3_M3 (BIOS, Codecs, Applications)
# 0x8F800000 8 MB DDRALGHEAP (for Ducati M3s)


# insert CMEM driver, using one block of memory
#
# Note: phys_end = (addr + 1)
#
# block 0: 0xa0000000 - 0xa07fffff (8 MB)
# pool: 80 KB, 20 x 4 KB buffers
# pool: 1280 KB, 10 x 128 KB buffers
# pool: 2048 KB, 2 x 1 MB buffers
# heap: 4784 KB, (~4.67 MB)
#
CMEM_MODPARAMS="phys_start=0x92c00000 phys_end=0x93ffffff pools=20x4096,10x131072,2x1048576"

# insert CMEM driver, using two blocks of memory
#
# To use this command, the kernel must be configured such that it does not
# use the internal memory located at 0x40200000 - 0x4020EFFF.
#
# block 1: 0x40200000 - 0x4020EFFF (60 KB), Internal Memory
# pool: 60 KB, 15 x 4 KB buffers (4 KB minimum size buffer allowed)
#
#CMEM_MODPARAMS="$CMEM_MODPARAMS phys_start_1=0x40200000 phys_end_1=0x4020F000 pools_1=15x4096 allowOverlap=1"

# For now, syslink.ko must be 'insmod'ed first so that the device major number
# matches with the hard-coded /dev/syslinkipc entries
if [ -e syslink.ko ]
then
insmod syslink.ko TRACE=0 TRACEFAILURE=1 TRACEENTER=1
else
modprobe syslink TRACE=0 TRACEFAILURE=1 TRACEENTER=1
fi

if [ -e /dev/syslinkipc ]
then
for dev in `ls /dev/syslinkipc`; do
chmod 666 /dev/syslinkipc/$dev
done
fi

if [ -e cmemk.ko ]
then
insmod cmemk.ko $CMEM_MODPARAMS
else
modprobe cmemk $CMEM_MODPARAMS
fi

# Allow cmem driver to be used by all users
if [ -e /dev/cmem ]
then
chmod 666 /dev/cmem
fi

Are you using EZSDK or DVR RDK?

See if the below e2e thread will be in help:
e2e.ti.com/.../397771

Regards,
Pavel

I use the ezsdk.the version is 5.05.02.00

Are you using 1GByte DDR3 memory?

Regards,
Pavel

yes.I use that 1G DDR3 memory.
I see the link. this may not answer my question.
I use top cmd, it shows that :
Mem: 99524K used, 134468K free, 0K shrd, 1028K buff, 30024K cached
so 300-240=50M.
but that linux must not to cross addr from 0x80000000 to 0x82c00000.

Jun,

If you need to run the Codec Engine, you should set the linux memory to 169M. See the below instructions:

ti-ezsdk_dm816x-evm_5_05_02_00/docs/DM816x_EZ_Software_Developers_Guide.pdf
3.3 Running the Codec Engine examples

Regards,
Pavel

When I set the linux mem to 169M as below, I am able to insert syslink and cmem modules successful.

Kernel command line: console=ttyO2,115200n8 rootwait root=/dev/mmcblk0p2 rw mem=169M@0x80000000 vmalloc=500M notifyk.vpssm3_sva=0xBF900000 ip=off noinitrd

root@dm816x-evm:/usr/share/ti/ti-codec-engine-examples# modprobe syslink
SysLink version : 2.20.02.20
SysLink module created on Date:Dec 26 2012 Time:11:03:34
root@dm816x-evm:/usr/share/ti/ti-codec-engine-examples# modprobe cmemk phys_start=0x94000000 phys_end=0x947fffff pools=20x4096,10x131072,2x1048576
CMEMK module: built on Dec 26 2012 at 11:23:47
Reference Linux version 2.6.37
File /swcoe/sdk/cm/netra/arago-tmp/work/dm816x-evm-none-linux-gnueabi/ti-linuxutils-1_3_22_00_02-r4d/linuxutils_3_22_00_02/packages/ti/sdo/linuxutils/cmem/src/module/cmemk.c
allocated heap buffer 0xd1000000 of size 0x4ac000
cmemk initialized