Bus error (core dumped) occurred when using busybox devmem on the rootpoint of PCIE

In EP/RP mode configuration, when using “lspci -v” at the root point, the memory address 0x28000000 works fine with “busybox devmem 0x28000000 32 0x12345678”.

However, when attempting “busybox devmem 0x28000001 32 0x12345678”, it results in a “Bus error (core dumped)”. How can this issue be resolved?