It waits for 3 seconds and shows a countdown:
TIM-1.0
WTMI-devel-1.0.0-1115f12
WTMI: system early-init
SVC REV: 5, CPU VDD voltage: 1.237V
NOTICE: Booting Trusted Firmware
NOTICE: BL1: v1.5(release):ROGUE2-01.00.00.01-cpu1_2G-0-g06b570a8d (Marvell-release-1.3.0)
NOTICE: BL1: Built : 14:34:11, Feb 7 2020
NOTICE: BL1: Booting BL2
NOTICE: BL2: v1.5(release):ROGUE2-01.00.00.01-cpu1_2G-0-g06b570a8d (Marvell-release-1.3.0)
NOTICE: BL2: Built : 14:34:13, Feb 7 2020
NOTICE: BL1: Booting BL31
NOTICE: BL31: v1.5(release):ROGUE2-01.00.00.01-cpu1_2G-0-g06b570a8d (Marvell-release-1.3.0)
NOTICE: BL31: Built : 14
U-Boot 2018.03-devel-1.2.0ROGUE2-01.00.00.02+ (Feb 07 2020 - 14:33:22 -0500)
Model: Silicom Rogue-2
CPU 1200 [MHz]
L2 800 [MHz]
TClock 200 [MHz]
DDR 750 [MHz]
DRAM: 3.4 GiB
Comphy chip #0:
Comphy-0: SGMII1 3.125 Gbps
Comphy-1: PEX0 2.5 Gbps
Comphy-2: SATA0 6 Gbps
PCIE-0: Link down
MMC: sdhci@d8000: 0
Loading Environment from SPI Flash... mvebu_spi_ofdata_to_platdata: ofdata clock 200000000, frequency 20000000
SF: Detected w25q32bv with page size 256 Bytes, erase size 4 KiB, total 4 MiB
OK
Model: Silicom Rogue-2
Net: eth0: neta@30000, eth1: neta@40000 [PRIME]
Hit any key to stop autoboot: 0
Marvell>>
Pressing space (or any key) should stop the boot. If it doesn't then perhaps your terminal setup is not sending it correctly.
Steve