LAUNCHXL2 570LC43: LinkerECCRecommendation - VFILL

Answer:

Any line in the memory section that maps to the main FLASH array (no the ECC area..) This means any address between 0x00000000 and 0x003FFFFF.

For example, a simple HALCoGen project will have three memory regions mapped to the main flash array that need VFILL:

   VECTORS (X)  : origin=0x00000000 length=0x00000020 vfill = 0xffffffff
   FLASH0  (RX) : origin=0x00000020 length=0x001FFFE0 vfill = 0xffffffff
   FLASH1  (RX) : origin=0x00200000 length=0x00200000 vfill = 0xffffffff

On the other hand, memory that maps to on chip SRAM, the ECC area, or any other region in the memory map (such as EMIF) do not require a VFILL directive.

   STACKS  (RW) : origin=0x08000000 length=0x00001500
   RAM     (RW) : origin=0x08001500 length=0x0002EB00

   ECC_VEC (R)  : origin=0xf0400000 length=0x4 ECC={ input_range=VECTORS }
   ECC_FLA0 (R) : origin=0xf0400000 + 0x4 length=0x3FFFC ECC={ input_range=FLASH0 }
   ECC_FLA1 (R) : origin=0xf0440000 length=0x40000 ECC={ input_range=FLASH1 }

Note that the ECC area of the FLASH arrays are mapped to the high address space - 0xf0400000 - 0xf043FFFF. While these don't get a VFILL directive, they do get an ECC directive as shown above.