You could use CodeWarrior to flash ASK binaries on your target board.
1. Please refer to section "3.2 Working with bareboard application" in C:\Freescale\CW4NET_v2020.06\CW_ARMv8\ARMv8\Help\Getting_Started_for_CW_ARMv8.pdf to create a bareboard project in CodeWarrior IDE.
2. Please enable hard-coded RCW in CodeWarrior initialization file.
In Target Connections panel, please double click LS1046A_RDB(1) to open "Target Initialization File" panel, please modify "USE_SAFE_RCW = False" to "USE_SAFE_RCW = True", then save the configuration, and try to connect to your target board.
3. Please refer to section "7.7 Using flash programmer from eclipse IDE" in C:\Freescale\CW4NET_v2020.06\CW_ARMv8\ARMv8\Help\PDF\ARMv8_Targeting_Manual to do flash programming in CodeWarrior IDE.