Part Number: AM5726
Other Parts Discussed in Thread: AM5716
Tool/software:
We use EMIF1 and EMIF2 in our borad, every EMIF connectd to 2GB DDR. It is 4GB DDR in total.
In 5726 TRM, I found the following description:
Two 32-bit DDR controllers (EMIF1 and EMIF2), each supporting the following features:
– Memory density up to 2 GiB supported over one chip-select providing a total SDRAM space of 4
GiB addressable by the MPU extended address range.
I readed some topics about 4GB DDR in E2E forum，and configured my code following 3.3.4.3 in this doc:
so，my configuration is:
In MLO&u-boot-2019:
1. u-boot-2019.01/configs/am57xx_evm_defconfig:
CONFIG_ARMV7_LPAE=y
CONFIG_PHYS_64BIT=y
2. u-boot-2019.01/include/configs/am57xx_evm.h
static const struct dmm_lisa_map_regs beagle_x15_lisa_regs = {
.dmm_lisa_map_0 = 0x00000000,
.dmm_lisa_map_1 = 0x00000000,
.dmm_lisa_map_2 = 0x80740300,
.dmm_lisa_map_3 = 0xFF020100,
.is_ma_present = 0x1
};
int dram_init_banksize(void)
{
u64 ram_size;
ram_size = 0x100000000; //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;
}
I copy the following setting from SDK:ti-processor-sdk-linux-automotive-dra7xx-evm-6.00.00.03-installer.bin
www.ti.com/.../PROCESSOR-SDK-DRA7X
const struct emif_regs emif1_ddr3_532_mhz_1cs_2G = {
.sdram_config_init = 0x61851ab2,
.sdram_config = 0x61851ab2,
.sdram_config2 = 0x08000000,
.ref_ctrl = 0x000040F1,
.ref_ctrl_final = 0x00001035,
.sdram_tim1 = 0xCCCF36B3,
.sdram_tim2 = 0x30BF7FDA,
.sdram_tim3 = 0x427F8BA8,
.read_idle_ctrl = 0x00050000,
.zq_config = 0x0007190B,
.temp_alert_config = 0x00000000,
.emif_ddr_phy_ctlr_1_init = 0x0024400B,
.emif_ddr_phy_ctlr_1 = 0x0E24400B,
.emif_ddr_ext_phy_ctrl_1 = 0x10040100,
.emif_ddr_ext_phy_ctrl_2 = 0x00910091,
.emif_ddr_ext_phy_ctrl_3 = 0x00950095,
.emif_ddr_ext_phy_ctrl_4 = 0x009B009B,
.emif_ddr_ext_phy_ctrl_5 = 0x009E009E,
.emif_rd_wr_lvl_rmp_win = 0x00000000,
.emif_rd_wr_lvl_rmp_ctl = 0x80000000,
.emif_rd_wr_lvl_ctl = 0x00000000,
.emif_rd_wr_exec_thresh = 0x00000305
};
const struct emif_regs emif2_ddr3_532_mhz_1cs_2G = {
.sdram_config_init = 0x61851B32,
.sdram_config = 0x61851B32,
.sdram_config2 = 0x08000000,
.ref_ctrl = 0x000040F1,
.ref_ctrl_final = 0x00001035,
.sdram_tim1 = 0xCCCF36B3,
.sdram_tim2 = 0x308F7FDA,
.sdram_tim3 = 0x427F88A8,
.read_idle_ctrl = 0x00050000,
.zq_config = 0x0007190B,
.temp_alert_config = 0x00000000,
.emif_ddr_phy_ctlr_1_init = 0x0024400B,
.emif_ddr_phy_ctlr_1 = 0x0E24400B,
.emif_ddr_ext_phy_ctrl_1 = 0x10040100,
.emif_ddr_ext_phy_ctrl_2 = 0x00910091,
.emif_ddr_ext_phy_ctrl_3 = 0x00950095,
.emif_ddr_ext_phy_ctrl_4 = 0x009B009B,
.emif_ddr_ext_phy_ctrl_5 = 0x009E009E,
.emif_rd_wr_lvl_rmp_win = 0x00000000,
.emif_rd_wr_lvl_rmp_ctl = 0x80000000,
.emif_rd_wr_lvl_ctl = 0x00000000,
.emif_rd_wr_exec_thresh = 0x00000305
};
I used these setting in emif_get_reg_dump().
Uboot can print 4GB log.
cat /proc/meminfo shows 3.8GB or so.
However, I use memtester, it crashed. How to make 4GB DDR run correctly?
