How to change Linux kernel runing address

Thank you! I try it new.

Hellow,I haved follow the wiki, but it not work.

My kernel is K2_LINUX_03.10.72_15.08; My u-boot is u-boot-keystone(tag K2_UBOOT_2013-01_13.11).The CPU is TCI6638-k2k.
Linux is runing at address 0x80008000(DDR3A) by default. But this address is used by DSP progamme,os Linux have to runing at address 0xF6008000(DDR3B), mem size is 128M.

 
The following is I do:

Linux part:

K2_LINUX_03.10.72_15.08/arch/arm/mach-keystone/Makefile.boot
- zreladdr-y ?= 0x80008000
+ zreladdr-y ?= 0xF6000000

K2_LINUX_03.10.72_15.08/arch/arm/boot/dts/keystone.dtsi,
no change.
memory {
reg = <0x00000000 0x80000000 0x00000000 0x20000000>;
};

at "K2_LINUX_03.10.72_15.08/arch/arm/mach-keystone/include/mach/memory.h" file, is so differet from the wiki describe, so I didn't change this file.

static inline phys_addr_t __virt_to_idmap(unsigned long x)
{
#ifdef CONFIG_KEYSTONE_RECOVERY_KERNEL
return __virt_to_phys(x) - KEYSTONE_HIGH_PHYS_START +
#else
return (phys_addr_t)(x) - CONFIG_PAGE_OFFSET +
#endif
KEYSTONE_LOW_PHYS_START;
}

#define virt_to_idmap(x) __virt_to_idmap((unsigned long)(x))

U-boot part:

no change
#define CONFIG_NR_DRAM_BANKS 1
#define CONFIG_SYS_SDRAM_BASE 0x80000000
#define CONFIG_SYS_LPAE_SDRAM_BASE 0x800000000
#define CONFIG_MAX_RAM_BANK_SIZE (2 << 30) /* 2GB */
#define CONFIG_STACKSIZE (512 << 10) /* 512 KiB */
#define CONFIG_SYS_MALLOC_LEN (1024 << 10) /* 1 MiB */
#define CONFIG_SYS_MEMTEST_START CONFIG_SYS_SDRAM_BASE
#define CONFIG_SYS_MEMTEST_END (CONFIG_SYS_SDRAM_BASE + 32 << 20)
#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_TEXT_BASE - \
GENERATED_GBL_DATA_SIZE)

I didn't change the env of kernel and fdt:
TCI6638 EVM # printenv addr_kern
addr_kern=0x81008000
TCI6638 EVM # printenv addr_fdt
addr_fdt=0x87000000

I changed the env of bootags as:
console=ttyS0,115200n8 rootwait=1 rootfstype=ubifs root=ubi0:rootfs rootflags=sync rw ubi.mtd=2,2048 mem=128M

At last, I run the system:

U-Boot 2013.01-dirty (Sep 27 2016 - 14:29:31)

I2C: ready
Detected SO-DIMM [SQR-SD3T-2G1333SED]
gd->ram_size:80000000
DRAM: 2 GiB
NAND: 512 MiB
*** Warning - bad CRC, using default environment

Net: TCI6638_EMAC
Warning: TCI6638_EMAC using MAC address from net device
, TCI6638_EMAC1
Hit any key to stop autoboot: 0
Using TCI6638_EMAC device
TFTP from server 192.168.3.30; our IP address is 192.168.3.235
Filename 'uImage-hrst-lte.dtb'.
Load address: 0x87000000
Loading: T ####
10.7 KiB/s
done
Bytes transferred = 55893 (da55 hex)
Using TCI6638_EMAC device
TFTP from server 192.168.3.30; our IP address is 192.168.3.235
Filename 'skern-keystone-evm.bin'.
Load address: 0xc5f0000
Loading: ####
2.3 MiB/s
done
Bytes transferred = 45056 (b000 hex)
Using TCI6638_EMAC device
TFTP from server 192.168.3.30; our IP address is 192.168.3.235
Filename 'uImage'.
Load address: 0x81008000
Loading: #################################################################
#################################################################
#################################################################
#################################################################
###################
2.3 MiB/s
done
Bytes transferred = 4086616 (3e5b58 hex)
## installed monitor, freq [204800000], status 0
## Booting kernel from Legacy Image at 81008000 ...
Image Name: Linux-3.10.72
Created: 2016-09-27 6:08:10 UTC
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 4086552 Bytes = 3.9 MiB
Load Address: 60008000
Entry Point: 60008000
Verifying Checksum ... OK
## Flattened Device Tree blob at 87000000
Booting using the fdt blob at 0x87000000
comp 0 load:60008000 image_start:81008040
blob_start:81008000 image_start:81008040
Loading Kernel Image ... OK
OK
do_bootm_linux:0
Using Device Tree in place at 87000000, end 87010a54
tree addree:87000000
lpae:1
nbanks:1
start[0]:a size:0
## Transferring control to Linux (at address 60008000)...

Starting kernel ...

The Linux kernel init fail.
I debug the with ccs. I found that: The kernel haved runing
start_kernel() --->
       setup_arch() --->
               paging_init() --->
                      dma_contiguous_remap --->
                               iotable_init --->
                                       iotable_init (kenel runaway here )

I have some question:

1    the vmlinux have runing at specifying phy address?

2   If the ddram base address is 0x80000000, the kernel can runing at 0x81000000?

3 The kernel's ram sourece,is just decideing by the fdt file?

Thank you,very much!

I do you suggest.