How to access the 8GB ram of DDR in Agilex 7

Hi,

still the error not resolved and i doubt,memory region mapping is not the issue.While using bdinfo command in u-boot terminal it clearly shows the mapped 8gb of address,but the issue is only 2GB is effective remaining 6GB is reserved.Refer the below log.

bdinfo log

"

lmb_dump_all:
memory.cnt = 0x2 / max = 0x10
memory[0] [0x0-0x7fffffff], 0x80000000 bytes flags: 0 ( 2GB )
memory[1] [0x280000000-0x3ffffffff], 0x180000000 bytes flags: 0 ( 6GB )
reserved.cnt = 0x4 / max = 0x10
reserved[0] [0x0-0x1ffffff], 0x02000000 bytes flags: 4
reserved[1] [0x7eb08000-0x7fffffff], 0x014f8000 bytes flags: 0
reserved[2] [0x7fb0e940-0x7fffffff], 0x004f16c0 bytes flags: 0
reserved[3] [0x280000000-0x3ffffffff], 0x180000000 bytes flags: 0 ( Reserved 6GB )

"

2.Checked the serial console while running the u-boot,which mentioned DDR : 8192 MiB but DRAM: 2 GiB (effective 8 GiB)

u-boot serial console log

"

U-Boot SPL 2024.07-36773-g0dad0a0a478-dirty (Feb 11 2025 - 12:14:33 +0530)
Reset state: Cold
MPU 1350000 kHz
L4 Main 400000 kHz
L4 sys free 100000 kHz
L4 MP 200000 kHz
L4 SP 100000 kHz
SDMMC 50000 kHz
DDR: 8192 MiB
SDRAM-ECC: Initialized success with 13735 ms
QSPI: Reference clock at 400000 kHz
WDT: Started watchdog@ffd00200 with servicing every 1000ms (10s timeout)
Trying to boot from MMC1
## Checking hash(es) for config board-0 ... OK
## Checking hash(es) for Image atf ... crc32+ OK
## Checking hash(es) for Image uboot ... crc32+ OK
## Checking hash(es) for Image fdt-0 ... crc32+ OK
NOTICE: BL31: v2.10.0 (release):
NOTICE: BL31: Built : 14:42:42, Dec 19 2024


U-Boot 2023.10 (Dec 24 2024 - 15:22:57 +0530)socfpga_agilex

CPU: Intel FPGA SoCFPGA Platform (ARMv8 64bit Cortex-A53)
Model: SoCFPGA Agilex SoCDK
DRAM: 2 GiB (effective 8 GiB)
Core: 27 devices, 22 uclasses, devicetree: separate
WDT: Started watchdog@ffd00200 with servicing every 1000ms (10s timeout)
MMC: dwmmc0@ff808000: 0
Loading Environment from FAT... Unable to read "uboot.env" from mmc0:1...
In: serial0@ffc02000
Out: serial0@ffc02000
Err: serial0@ffc02000
Net:
Warning: ethernet@ff804000 (eth0) using random MAC address - 1a:8f:6a:b4:eb:81
eth0: ethernet@ff804000
Hit any key to stop autoboot: 0

"

I have attached the serial console and bdinfo log image for your reference.

Thanks,

M Gokulraj