ROM to RAM mapped CA78k0r

Hi all.

I am using r5f104aga with cs+ ca78k0r enviroment.

In my program main.c, flash.c(use FSL to erase all block and rewrite new program).

I want to copy code from ROM flash.c to RAM to execute.

 flash.c allocate at 0001E000H of ROM

And then I copy code of flash.c to RAM.

src = (unsigned char __far*)(0x01E000);
dst = (unsigned char __far*)(0x0FDE20);

for(i=0;i<(4096);i++){
*(dst + i) = *(src + i);
}
 I jump program counter to 0x0FDE20 with asm: BR !!00FDE20H

it's ok but code in RAM not mapped from ROM.

How to map ROM to RAM?

Thank you.

Vu.