The logic on the board usually allows the NOR flash to be accessed from different CS (chip select) option. Each CS is connected
to dedicated flash devices. U-Boot prints which CS is loaded from. The output looks like following.
NOTICE: Fixed DDR on board
NOTICE: 4 GB DDR4, 32-bit, CL=11, ECC on
NOTICE: BL2: v1.5(release):LSDK-18.12-8-gaf6a777e
NOTICE: BL2: Built : 03:34:46, Feb 18 2019
NOTICE: BL31: v1.5(release):LSDK-18.12-8-gaf6a777e
NOTICE: BL31: Built : 03:35:28, Feb 18 2019
NOTICE: Welcome to LS1028 BL31 Phase
U-Boot 2018.09-g30fb661336 (Feb 18 2019 - 03:33:37 +0800)
SoC: LS1028AE Rev1.0 (0x870b0010)
Clock Configuration:
CPU0(A72):1300 MHz CPU1(A72):1300 MHz
Bus: 400 MHz DDR: 1600 MT/s
Reset Configuration Word (RCW):
00000000: 34004010 00000030 00000000 00000000
00000010: 00000000 008f0000 0030c000 00000000
00000020: 020031a0 00002580 00000000 00003296
00000030: 00000000 00000010 00000000 00000000
00000040: 00000000 00000000 00000000 00000000
00000050: 00000000 00000000 00000000 00000000
00000060: 00000000 00000000 200e705a 00000000
00000070: bb580000 00000000
Model: NXP Layerscape 1028a RDB Board
Board: LS1028AE Rev1.0-RDB, Version: C, boot from NOR
FPGA: v5 (RELEASED: RDB_2018_1204_1540)
SERDES1 Reference : Clock1 = 100.00MHz Clock2 = 100.00MHz
I2C: ready
DRAM: 3.9 GiB
DDR 3.9 GiB (DDR4, 32-bit, CL=11, ECC on)
Using SERDES1 Protocol: 47960 (0xbb58)
PCIe0: pcie@3400000 Root Complex: no link
PCIe1: pcie@3500000 Root Complex: no link
Now running in RAM - U-Boot at: fbd3f000
MMC: FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from SPI Flash... SF: Detected mt35xu02g with page size 256 Bytes, erase size 128
KiB, total 256 MiB
OK
EEPROM: NXID v1
In: serial
Out: serial
Err: serial
Net: eth0: enetc#0 [PRIME], eth1: enetc#1, eth2: enetc#2, eth3: netc_mdio, eth4: enetc#3
MDIO MUX: no MDIO MUX node
Hit any key to stop autoboot: 0
Boot option switching can be performed in U-Boot using the following statements.
• Switch to FlexSPI NOR flash (default):
=>qixis_reset
LS1028A BSP user guide
Layerscape LS1028A BSP User Guide, Rev. 0.3, 04/2019
18
NXP Semiconductors
Summary of Contents for Layerscape LS1028A BSP
Page 135: ......