模块cmemk.ko为ARM和DSP通信提供连续的内存，装载的格式为： insmod cmemk.ko       pools=4x30000, 2x500000   phys_start=0x0   phys_end=0x3000000      pools_1=4x65536    phys_start_1=0x80000000 phys_end_1=0x80010000 表明1、在内存0x0~0x2ffffff上开辟了两个内存池，第一个由4个30000字节得缓存组成，第二个由2个500000字节的缓存组成。2、在内存 0x80000000~0x8000ffff上开辟了一个由4个65536字节缓存组成的内存池。（注：低版本的cmem只支持一块内存）按照Davinci内存的划分，cmem的内存空间位于linux内存和DSP算法使用的内存之间，在dvsdk2.0中cmem内存空间为118~128M（低版本的dvsdk为120~128M，不过低版本的dvsdk的DSP server程序128M之后的很大一块也没有使用，cmem大一点也没事，不过2.0中DSP server程序内存使用从128M开始） dvsdk2.0中，cmem模块目录为： [root@localhost cmem]# pwd /opt/dvsdk_2_00_00_22/linuxutils_2_23_01/packages/ti/sdo/linuxutils/cmem [root@localhost cmem]# tree . -- CMEM.xdc                                                   -- Makefile                                                   -- Rules.make                                                   -- apps                                                       -- Makefile                                                       -- apitest |                                                                 -- Makefile                                                                 -- apitest.c                                                        -- insmod_rmmod                                                                  -- Makefile                                                                 -- insmod_rmmod.sh                                                                  -- insmod_rmmod_omapL137.sh                                                          -- multi_process                                                                   -- Makefile                                                                   -- multi_process.c                                                           -- translate                                                                   -- Makefile                                                                   -- translate.c                                                      -- include                                                              -- cmem.h                                                      -- lib                                                              -- cmem.a470MV                                                      -- package                                                               -- build.cfg                                                               -- package.bld.xml                                                               -- package.defs.h                                                               -- package.doc.xml                                                               -- package.ext.xml                                                               -- package.rel.dot                                                                -- package.rel.xml                                                                -- package_ti.sdo.linuxutils.cmem.c                                                                -- ti.sdo.linuxutils.cmem.ccs                                                                  -- ti.sdo.linuxutils.cmem.sch                                                                 -- package.xdc                                                                -- package.xs                                                                    -- readme.txt                                                           -- src                                                                  -- Makefile                                                                 -- interface                                                                        -- Makefile                                                                        -- cmem.c                                                                        -- cmem.h                                                                        -- release                                                                                  -- cmem.o470MV                                                                    -- module                                                                        -- Makefile                                                                        -- Module.symvers                                                                        -- cmemk.c                                                                         -- cmemk.ko                                                                        -- cmemk.mod.c                                                                         -- cmemk.mod.o                                                                         -- cmemk.o 12 directories, 40 files [root@localhost cmem]# cmem提供的接口在demo中没有出现，而是被中间件进行了封装。dvsdk1.3中内存的分配使用了CE中OSAL包中Memory模块的 Memory_contigAlloc()函数，dvsdk2.0的demo使用了DMAI模块（在CE基础上进一步进行了封装）。 CMEM是一个连续物理存储空间分配模块，使得ARM端Linux进程和DSP端算法之间能够共享缓冲区。当应用程序需要在共享缓存区动态申请一个连续的物理空间时，通过调用CMEM的API可以实现，申请得到的空间可以供DSP端访问，进行算法处理时数据的传递与处理。在DVSDK中集成了CMEM模块，CMEM模块安装在Linux服务器下的路径为：/opt/dvevm_1_20/cmem_1_02在Linux服务器的控制台下，需进行如下操作实现编译：Host # cd /opt/dvevm_1_20/cmem_1_02/packages/ti/sdo/linuxutils/cmemHost # make allHost #make install运行后，即对cmem模块进行了编译，编译文件为在目录src/module下生成的cmem.ko模块，并将cmem.ko和测试文件安装到了目标板的/opt/nfs/opt/dvsdemos目录下。DVSDK中的CMEM Demo提供了测试程序：apitest能够测试CMEM的API功能，translate能够测试虚拟地址与实物理地址之间的转换功能.