Linux/AM5728: 4GB DDR memory configuration

Hi Denny,

You should look at the dra7xx evm.c file to see how they manage to set the 4GB ddr.

Try adding the following in am57xx_evm.h:
#define CONFIG_VERY_BIG_RAM
#define CONFIG_NR_DRAM_BANKS 2
#define CONFIG_MAX_MEM_MAPPED 0x80000000

If just the above doesn't work, try adding the following code in dram_init_banksize() (see common/board_f.c):
int dram_init_banksize(void)
{
u64 ram_size;

ram_size = board_ti_get_emif_size();

gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
gd->bd->bi_dram[0].size = get_effective_memsize();
if (ram_size > CONFIG_MAX_MEM_MAPPED) {
gd->bd->bi_dram[1].start = 0x200000000;
gd->bd->bi_dram[1].size = ram_size - CONFIG_MAX_MEM_MAPPED;
}

return 0;
}

You can reference this thread:
e2e.ti.com/.../586776

Best Regards,
Yordan