[U-Boot] uboot nor xip support

Hi, I need some help resolving system hang when booting from NOR flash (XIP boot).

On our system we have CFI NOR flash sitting at base 0x08000000. with CONFIG_SYS_MONITOR_BASE and TEXT_BASE being set at the flash base address in board config file. But the system hangs when we actually try to boot from flash. earlier we verified that the flash works fine when booting from RAM.

with uboot code and env occupying first two sector in flash (0x08000000 + 2 * 128KB), I think the hang could arise from the fact that Monitor stack, Board info data and malloc arena growing downward and crossing flash boundaries. Our ROM bootcode is configured to jump at flash base so I couldn't really write uboot code at some other offset in NOR flash.

Regards Amol