一：建立工程文件
1.修改/board/dave/B2为/board/dave/ULong44b0
2.修改/board/dave/ULong44b0/B2.c为ULong44b0.c
3.修改/board/dave/ULong44b0/Makefile中B2.o为ULong44b0.o
4.修改/include/configs/B2.h为ULong44b0.h 5.修改/Makefile
B2_config : unconfig
@./mkconfig $(@:_config=) arm s3c44b0 B2 dave
为
ULong44b0_config : unconfig
@./mkconfig $(@:_config=) arm s3c44b0 ULong44b0 dave 二：详细修改
1. /include/configs/ULong44b0.h #define CONFIG_B2 1 /* on an B2 Board */
修改为
#define CONFIG_ULong44b0 1 /* on an tti44b Board */ #define CONFIG_S3C44B0_CLOCK_SPEED 75 /* we have a 75Mhz S3C44B0*/
修改为
#define CONFIG_S3C44B0_CLOCK_SPEED 60 /* we have a 60 Mhz S3C44B0*/ #define CONFIG_DRIVER_ LAN91C96
#define CONFIG_LAN91C96_BASE 0x04000300 /* base address */
修改为
#define CONFIG_DRIVER_RTL8019 //we have a RTL8019AS chip
#define RTL8019_BASE 0x6000000 //修改 原值为0c700000
//#define CFG_LOAD_ADDR 0x0c800000 /* default load address */
//这是uclinux加载的地址，将uclinux内核下载到sdram后运行的地址
修改
//sdram和Nor flash的参数地址和大小，修改为自己开发办上相应的值。
/* Physical Memory Map*/
#define CONFIG_NR_DRAM_BANKS 1 /* we have 1 banks of DRAM */
#define PHYS_SDRAM_1 0x0c000000 /* SDRAM Bank #1 */
#define PHYS_SDRAM_1_SIZE 0x00800000 /* 8 MB */
#define PHYS_FLASH_1 0x00000000 /* Flash Bank #1 */
#define PHYS_FLASH_SIZE 0x00200000 /* 2MB */ #define CFG_FLASH_BASE PHYS_FLASH_1
2. /cpu/s3c44b0/serial.c
#if CONFIG_S3C44B0_CLOCK_SPEED==60
divisor = 32; 3. cpu/s3c44b0/start.S: ldr r1, =PLLCON #if CONFIG_S3C44B0_CLOCK_SPEED==60
ldr r0, = 0x88042
#elif CONFIG_S3C44B0_CLOCK_SPEED==75
ldr r0, =0x610c1 /*B2: Xtal=20mhz Fclk=75MHz */
#elif CONFIG_S3C44B0_CLOCK_SPEED==64
ldr r0, =((M_DIV<<12)+(P_DIV<<4)+S_DIV) //Fin=8MHz,Fout=64MHz
#else
#error CONFIG_S3C44B0_CLOCK_SPEED undefined
#endif 中断向量表部分：
add pc, pc, #0x0c000000
add pc, pc, #0x0c000000
add pc, pc, #0x0c000000
add pc, pc, #0x0c000000
add pc, pc, #0x0c000000
add pc, pc, #0x0c000000
add pc, pc, #0x0c000000
修改为：
LDR PC, Undefined_Addr
LDR PC, SWI_Addr
LDR PC, Prefetch_Addr
LDR PC, Abort_Addr
LDR PC,RESERVE_Addr
LDR PC, IRQ_Addr
/* subs pc,lr,#4*/
LDR PC, IRQ_Addr
/* subs pc,lr,#4*/ Undefined_Addr:
.word 0x0c000004
SWI_Addr:
.word 0x0c000008
Prefetch_Addr:
.word 0x0c00000C
Abort_Addr:
.word 0x0c000010
RESERVE_Addr:
.word 0x0c000014
IRQ_Addr:
.word 0x0c000018
FIQ_Addr:
.word 0x0c00001C
4. /board/dave/common/flash.c
flash_get_offsets函数中的flash芯片块的大小如下
/* set up sector start address table */
if (((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) ||
((info->flash_id & FLASH_TYPEMASK) == FLASH_AM640U)) {
for (i = 0; i < info->sector_count; i++)
info->start[i] = base + (i * 0x00008000);//39VF1601 每块大小为32K flash_get_size函数中增加flash芯片信息
case (CFG_FLASH_WORD_SIZE)SST_ID_xF1601://增加VF1601的判断语句
info->flash_id += FLASH_SST160A;
info->sector_count = 64;//总共2M，每块32k，共64
info->size = 0x00200000;
break; /* => 2 MB */ 文件中B2全修改为ULong44b0 5. /drivers/rtl8019.h 36 #define ETH_ADDR_SFT (8)
37 #define EI_SHIFT(x) ((x)<<ETH_ADDR_SFT)
38
39 #define RTL8019_REG_00 (RTL8019_BASE + EI_SHIFT(0x00))
40 #define RTL8019_REG_01 (RTL8019_BASE + EI_SHIFT(0x01)) #define RTL8019_REG_02 ...
...
6. /board/dave/ULong44b0/lowlevel_init.S
MEMORY_CONFIG:
.long 0x11010102
.long 0x600
.long 0x7ffc
.long 0x7ffc
.long 0x7ffc
.long 0x7ffc
.long 0x2610
.long 0x18000
.long 0x18000
.long 0x960459
.long 0x10
.long 0x20
.long 0x20 7. /include/configs/ULong44b0.h 79 #define CONFIG_COMMANDS ( CONFIG_CMD_DFL | \
80 CFG_CMD_DATE | \
81 CFG_CMD_ELF | \
82 CFG_CMD_NET | \
CFG_CMD_PING | \
83 CFG_CMD_ENV|CFG_CMD_FLASH )
173 #define CFG_ENV_IS_IN_FLASH
174 #undef CFG_ENV_IS_NOWHERE
175
176 #define CFG_ENV_ADDR (CFG_FLASH_BASE + 0x20000) /* environment start address */
177 #define CFG_ENV_SECT_SIZE 0x10000 /* Total Size of Environment Sector */ 增加宏
#define CFG_MONITOR_BASE PHYS_SDRAM_1
三：编译出错后的修改
/cpu/s3c44b0/下的config.mk:
PLATFORM_CPPFLAGS +=$(call cc-option,-mapcs-32,-mabi=apcs-gnu)
改成：
PLATFORM_CPPFLAGS +=$(call cc-option,-mapcs-32,$(call cc-option,-mabi=apcs-gnu),)
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