I have a tablet with 1Gb of ram (two chips),but not u-boot neither kernel 
detect it (only 512Mb).

Does i need to change something in arch/arm/mach-sunxi/dram_sun8i_a33.c ?

i posta alettronica found this struct in sunxi_dram_init(void) function:

struct dram_para para = {
                .cs1 = 0,
                .bank = 1,
                .rank = 1,
                .rows = 15,
                .bus_width = 16,
                .page_size = 2048,
        };



Thanks
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