How to start boot up in the region of 0x1000 memory address (Cortex-M0)

Hi, All.

I want to start booting up a code in RAM starting with 0x1000 address in below circumstances. Please give me any advices for the below explanations.

My platform has one ROM and one RAM.

ROM and RAM both have their own F/W.

Core executes ROM codes first, then move program counter to ram region in general. And sometimes I want to implement to start booting up a instruction codes from RAM, ROM is being deactivated at this point.

Address map of memory is constructed as follows.

ROM (0x0000_0000 ~ 0x0000_0FFF)
RAM(0x0000_1000 ~ 0x0000_1FFF)

I want to start  fetching the instruction code from 0x0000_1000 but in simulation, core (CM0) always starts fetching instruction from 0x0000_0000 address.

I modified scatter file as follows to solve this, but core still start instruction fetching from 0x0000_0000.

Is a core(CM0) design option for deciding start address fetching the instruction? or Are any other ways to change start address what I want to?

scatter.scat

ROM_LOAD 0x00001000

{

         EFLASH 0x00001000

         {

              startup_CMSDK_CM0.o (RESET, +First)

              *.o(+RO)

          }

          SRAM 0x00001800

          {

               *.o(+RW,+ZI)

           }

}