按三星默认的u-boot，内存起始地址是0x20000000，即memory port1，如果要让u-boot只在0x40000000（即memory port2） 运行，则需要修改的地方有：
（参考T34平台u-boot中的修改为0x30000000）
1.修改 board\samsung\smdkc110\lowlevel_init.S
[plain] view plaincopy
- .set __base,0x200 ==>> .set __base,0x400
-
- // 256MB for SDRAM with cacheable
-
- .rept 0xD00 - 0xC00
-
- FL_SECTION_ENTRY __base,3,0,1,1
-
- .set __base,__base+1
-
- .endr
2. board/samsung/smdkc110/smdkc110.c
[cpp] view plaincopy
- ulong virt_to_phy_smdkc110(ulong addr)
-
- {
-
- if ((0xc0000000 <= addr) && (addr < 0xd0000000))
-
- return (addr - 0xc0000000 + 0x20000000); //yan
-
- else
-
- printf("The input address don't need "\
-
- "a virtual-to-physical translation : %08lx\n", addr);
-
-
-
-
- return addr;
-
- }
修改为
[cpp] view plaincopy
- ulong virt_to_phy_smdkc110(ulong addr)
-
- {
-
- if ((0xc0000000 <= addr) && (addr < 0xd0000000))
-
- return (addr - 0xc0000000 + MEMORY_BASE_ADDRESS); //yan
-
- else
-
- printf("The input address don't need "\
-
- "a virtual-to-physical translation : %08lx\n", addr);
-
-
-
-
- return addr;
-
- }
3. include\configs\smdkv210single.h
[cpp] view plaincopy
- #define MEMORY_BASE_ADDRESS
- 0x40000000
-
- #define DMC1_MEMCONFIG_0
- 0x40E01323
-
- #define CONFIG_NR_DRAM_BANKS 1 /* we have 2 bank of DRAM */
-
- #define SDRAM_BANK_SIZE 0x20000000 /* 512 MB */
-
- //#define SDRAM_BANK_SIZE 0x10000000
-
- #define PHYS_SDRAM_1 MEMORY_BASE_ADDRESS /* SDRAM Bank #1 */
-
- #define PHYS_SDRAM_1_SIZE SDRAM_BANK_SIZE /* jeff */
-
- //#define PHYS_SDRAM_2 0x40000000 /* SDRAM Bank #2 */
-
- //#define PHYS_SDRAM_2_SIZE SDRAM_BANK_SIZE /* jeff */
-
- #ifdef CONFIG_ENABLE_MMU
-
- #define CFG_UBOOT_BASE 0xc3e00000
-
- #else
-
- #define CFG_UBOOT_BASE 0x43e00000
-
- #endif
-
- #define CONFIG_BOOTCOMMAND "movi read kernel C0008000; movi read rootfs 40B00000 180000; bootm C0008000 40B00000"
4.内核中的修改
[plain] view plaincopy
- MACHINE_START(SMDKV210, "SMDKV210")
- .boot_params = S5P_PA_SDRAM + 0x100,
arch/arm/mach-s5pv210/include/mach/map.h
[cpp] view plaincopy
- #define S5P_PA_SDRAM S5PV210_PA_SDRAM
-
- #define S5PV210_PA_SDRAM (0x40000000)
arch/arm/mach-s5pv210/include/mach/memory.h
[cpp] view plaincopy
- #define PHYS_OFFSET UL(0x40000000)
arch/arm/mach-s5pv210/Makefile.boot
[plain] view plaincopy
- zreladdr-y := 0x40008000
- params_phys-y := 0x40000100
转载自：http://blog.csdn.net/knock/article/details/7625579
[
本帖最后由 Wince.Android 于 2013-5-25 16:21 编辑 ]
京公网安备 11010802033920号
