关于nor flash启动时栈的问题

            IMPORT main
            AREA Init,CODE,READONLY
            entry
            code32
            ldr r0, =0x53000000
            mov r1, #0x0
            str r1, [r0]
            ldr sp, =1024 * 4
            
            bl main
main_loop
               b main_loop
            END
这里设置为nor flash启动，的ro为0x30000000,而sp是1024*4,那栈是在nor flash中呢，还是在sdram中呢？ro为0x30000000,那程序是从0x0启动还是从0x30000000呢