Hi3531支持2GByte内存  

型号为K4B4G1646B-HCKO

1.修改DDRC_RNKCFG 为 0x142

2.修改arch/arm/mach-godnet/include/mach/vmalloc.h 扩大 vmalloc 区域为 0x7e000000

3.修改内核配置 Memory split 为 2G/2G user/kernel split          

4.修改uboot参数，给操作系统配1GByte内存

setenv bootargs 'mem=1G console=ttyAMA0,115200 root=/dev/mtdblock2 rootfstype=jffs2 mtdparts=hi_sfc:1M(boot),4M(kernel),11M(rootfs);hinand:16G(nand)'

5.修改load3531脚本，给mmz配置1GByte内存

insmod mmz.ko mmz=anonymous,0,0xC0000000,1024M anony=1 || report_error