BL2 memory map:

00100200 - 00100203 (000004)  : Flag of debugger hook for RAM boot

40100000 - 401fffff (100000)  : Scratch buffer for mtk-qspi/mtk-snand driver
40400000 - 407fffff (400000)  : Scratch buffer for UBI/NMBM/RAM-load
40800000 - 40bfffff (400000)  : FIP XZ decompression buffer
41000000 - 41dfffff (e00000)  : Block device buffer
41e00000 - 427fffff (a00000)  : BL33
42800000 - 433fffff (c00000)  : Reserved for pstore and BL31
43400000 - 443fffff (1000000) : Scratch buffer for Dual-FIP