二、下载源代码
U-BOOT-1.3.2:
ELDK:
（本来是用2.95的arm-elf-gcc来编译的，但是出现的问题太多，软浮点，-MQ选项不支持等等，网上说的我全部都遇到了。看来自己的运气还是不错啊）
三、解压安装
U-BOOT-1.3.2直接解压就可以了
tar –jxf u-boot-1.3.2.tar.bz2
ELDK则需要通过虚拟光驱来安装。我是用VM来运行LINUX，所以直接用虚拟光驱load就可以了。进入光驱目录，输入
./install –d /opt/eldk/
不到五分钟就可以安装完成了。记得在/etc/profile里面加入搜索路径。
四、开始移植
1) 拷贝一份B2板的数据。
分析之后发现原来B2板跟ARMSYS 44B0的板最接近，就从它开始着手吧。
[root@localhost u-boot-1.3.2]# mkdir board/armsys
[root@localhost u-boot-1.3.2]# cp -r board/dave/* board/armsys/
[root@localhost u-boot-1.3.2]# mv board/armsys/B2/ board/armsys/44B0/
[root@localhost u-boot-1.3.2]# mv board/armsys/44B0/B2.c board/armsys/44B0/44B0.c
[root@localhost u-boot-1.3.2]# cp include/configs/B2.h include/configs/44B0.h
2) 修改主Makefile，增加44B0选项
打开u-boot-1.3.2目录下面的Makefile，在B2_config下面增加一项
44B0_config : unconfig
@$(MKCONFIG) $(@:_config=) arm s3c44b0 44B0 armsys
（记着需要用用TAB代替空格！）
3) 修改CPU的配置
现在需要修改44B0的配置了。U-BOOT-1.3.2在CPU的目录下面已经给很多CPU进行分类管理，只要修改一下就能用了。我们选S344B0的CPU。根据LIYUTAI的源代码，我们只需修改相应的部分就可以了。
A. 修改start.s文件（参照LIYUTAI的BOOTLOADER）
#include
#include
//**********OPTIONS*******************************
//_RAM_STARTADDRESS EQU 0xc000000
#define _ISR_STARTADDRESS 0xc7ff000 //GCS6:8MB SDRAM
#define _IRQ_BASEADDRESS 0xc000000 //GCS6:8MB SDRAM
//GBLA PLLCLK
#define PLLCLK 64000000
//系统主频计算公式如下：
//Fout = (8+ M_DIV)*Fin/[(2+P_DIV)*2]
#define M_DIV 56 //Fin=8MHz Fout = ((56+8)/8)*8 =64MHz
#define P_DIV 2
#define S_DIV 1
/*
* Jump vector table
*/
.globl _start
_start:
b reset // Reset
ldr pc, =(_IRQ_BASEADDRESS + 0x04) // HandlerUndef
ldr pc, =(_IRQ_BASEADDRESS + 0x08) // HandlerSWI
ldr pc, =(_IRQ_BASEADDRESS + 0x0C) // HandlerPabort
ldr pc, =(_IRQ_BASEADDRESS + 0x10) // HandlerDAbort
ldr pc, =(_IRQ_BASEADDRESS + 0x14) // HandlerReserved
ldr pc, =(_IRQ_BASEADDRESS + 0x18) // HandlerIRQ
ldr pc, =(_IRQ_BASEADDRESS + 0x1C) // HandlerFIQ
.balignl 16,0xdeadbeef
/*
*************************************************************************
*
* Startup Code (reset vector)
*
* do important init only if we don't start from memory!
* relocate u-boot to ram
* setup stack
* jump to second stage
*
*************************************************************************
*/
_TEXT_BASE:
.word TEXT_BASE
.globl _armboot_start
_armboot_start:
.word _start
/*
* These are defined in the board-specific linker script.
*/
.globl _bss_start
_bss_start:
.word __bss_start
.globl _bss_end
_bss_end:
.word _end
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
.globl IRQ_STACK_START
IRQ_STACK_START:
.word 0x0badc0de
/* IRQ stack memory (calculated at run-time) */
.globl FIQ_STACK_START
FIQ_STACK_START:
.word 0x0badc0de
#endif
/*
* the actual reset code
*/
reset:
/*
* set the cpu to SVC32 mode
*/
mrs r0,cpsr
bic r0,r0,#0x1f
orr r0,r0,#0x13
msr cpsr,r0
/*
* we do sys-critical inits only at reboot,
* not when booting from ram!
*/
#ifndef CONFIG_SKIP_LOWLEVEL_INIT
bl cpu_init_crit
/*
* before relocating, we have to setup RAM timing
* because memory timing is board-dependend, you will
* find a lowlevel_init.S in your board directory.
*/
bl lowlevel_init
#endif
/**
* test the memory befor relocate
*/
#ifdef CONFIG_MEM_TEST
#define PDATE 0x1d2002c
ldr r0, =PHYS_SDRAM_1 //地址指针
ldr r1, =PHYS_SDRAM_1_SIZE //地址边界
add r1,r0,r1 //r1 is the bound
ldr r3,=0xAA55AA44
loop:
str r3,[r0] //保存数据到内存
ldr r4,[r0] //重新读取数据
cmp r4,r3 //比较数据
bne error
add r0,r0,#4 //指向下一个指针
cmp r0,r1 //判断是否到达边界
beq mem_test_ok
bne loop
error:
ldr r0,=PDATE //PDATE=PDATE&0x1f7;
ldr r1,[r0]
ldr r2,=0x1f7
and r1,r1,r2
str r1,[r0]
bl delay //Beep
ldr r1,[r0] //PDATE=PDATE|0x8;
mov r2,#0x8
orr r1,r1,r2
str r1,[r0]
bl delay //stop Beep
end:
b end //stop
delay:
ldr r3,=0xFFFF
e_loop1:
sub r3,r3,#1
cmp r3,#0
beq loop_end
ldr r4,=0xFF
e_loop2:
sub r4,r4,#1
cmp r4,#0
bne e_loop2
b e_loop1
loop_end:
mov pc,lr
mem_test_ok:
#endif
#ifndef CONFIG_SKIP_RELOCATE_UBOOT
relocate: /* relocate U-Boot to RAM */
adr r0, _start /* r0 <- current position of code */
ldr r1, _TEXT_BASE /* test if we run from flash or RAM */
cmp r0, r1 /* don't reloc during debug */
beq stack_setup
ldr r2, _armboot_start
ldr r3, _bss_start
sub r2, r3, r2 /* r2 <- size of armboot */
add r2, r0, r2 /* r2 <- source end address */
copy_loop:
ldmia r0!, {r3-r10} /* copy from source address [r0] */
stmia r1!, {r3-r10} /* copy to target address [r1] */
cmp r0, r2 /* until source end addreee [r2] */
ble copy_loop
/*
now copy to sram the interrupt vector
*/
adr r0, real_vectors
add r2, r0, #1024
ldr r1, =0x0c000000
add r1, r1, #0x08
vector_copy_loop:
ldmia r0!, {r3-r10}
stmia r1!, {r3-r10}
cmp r0, r2
ble vector_copy_loop
#endif /* CONFIG_SKIP_RELOCATE_UBOOT */
/* Set up the stack */
stack_setup:
ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */
sub r0, r0, #CFG_MALLOC_LEN /* malloc area */
sub r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo */
#ifdef CONFIG_USE_IRQ
sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
clear_bss:
ldr r0, _bss_start /* BSS段的起始地址 */
ldr r1, _bss_end /* BSS段的结束地址 */
mov r2, #0x00000000 /* BSS段置0 */
clbss_l:
str r2, [r0] /* 循环清除BSS段 */
add r0, r0, #4
cmp r0, r1
ble clbss_l
ldr pc, _start_armboot
_start_armboot: .word start_armboot
/*
*************************************************************************
*
* CPU_init_critical registers
*
* setup important registers
* setup memory timing
*
*************************************************************************
*/
#define INTCON (0x01c00000+0x200000)
#define INTMSK (0x01c00000+0x20000c)
#define LOCKTIME (0x01c00000+0x18000c)
#define PLLCON (0x01c00000+0x180000)
#define CLKCON (0x01c00000+0x180004)
#define WTCON (0x01c00000+0x130000)
cpu_init_crit:
/* disable watch dog */
ldr r0, =WTCON
ldr r1, =0x0
str r1, [r0]
/*
* mask all IRQs by clearing all bits in the INTMRs
*/
ldr r1,=INTMSK
ldr r0, =0x07fffeff
str r0, [r1]
ldr r1, =INTCON
ldr r0, =0x05
str r0, [r1]
/* Set Clock Control Register */
ldr r0,=LOCKTIME
ldr r1,=0xfff
str r1,[r0]
ldr r1, =PLLCON
#if CONFIG_S3C44B0_CLOCK_SPEED==66
ldr r0, =0x34031 /* 66MHz (Quartz=11MHz) */
#elif CONFIG_S3C44B0_CLOCK_SPEED==75
ldr r0, =0x610c1 /*B2: Xtal=20mhz Fclk=75MHz */
#elif CONFIG_S3C44B0_CLOCK_SPEED==64
ldr r0, =0x38021 //Fin=8MHz,Fout=64MHz
#else
# error CONFIG_S3C44B0_CLOCK_SPEED undefined
#endif
str r0, [r1]
ldr r1,=CLKCON
ldr r0, =0x7ff8
str r0, [r1]
mov pc, lr
/*************************************************/
/* interrupt vectors */
/*************************************************/
real_vectors:
b reset
b undefined_instruction
b software_interrupt
b prefetch_abort
b data_abort
b not_used
b irq
b fiq
/*************************************************/
undefined_instruction:
mov r6, #3
b reset
software_interrupt:
mov r6, #4
b reset
prefetch_abort:
mov r6, #5
b reset
data_abort:
mov r6, #6
b reset
not_used:
/* we *should* never reach this */
mov r6, #7
b reset
irq:
mov r6, #8
b reset
fiq:
mov r6, #9
b reset
B. 修改serial.c，修改serial_setbrg。函数由于板上的波特率使用64MHz，所以需要增加相应的波特率配置
void serial_setbrg (void)
{
u32 divisor = 0;
/* get correct divisor */
switch(gd->baudrate) {
case 1200:
#if CONFIG_S3C44B0_CLOCK_SPEED==66
divisor = 3124;
#elif CONFIG_S3C44B0_CLOCK_SPEED==75
divisor = 3905;
#elif CONFIG_S3C44B0_CLOCK_SPEED==64
divisor = 3124;
#else
# error CONFIG_S3C44B0_CLOCK_SPEED undefined
#endif
break;
case 9600:
#if CONFIG_S3C44B0_CLOCK_SPEED==66
divisor = 390;
#elif CONFIG_S3C44B0_CLOCK_SPEED==75
divisor = 487;
#elif CONFIG_S3C44B0_CLOCK_SPEED==64
divisor = 390;
#else
# error CONFIG_S3C44B0_CLOCK_SPEED undefined
#endif
break;
case 19200:
#if CONFIG_S3C44B0_CLOCK_SPEED==66
divisor = 194;
#elif CONFIG_S3C44B0_CLOCK_SPEED==75
divisor = 243;
#elif CONFIG_S3C44B0_CLOCK_SPEED==64
divisor = 194;
#else
# error CONFIG_S3C44B0_CLOCK_SPEED undefined
#endif
break;
case 38400:
#if CONFIG_S3C44B0_CLOCK_SPEED==66
divisor = 97;
#elif CONFIG_S3C44B0_CLOCK_SPEED==75
divisor = 121;
#elif CONFIG_S3C44B0_CLOCK_SPEED==64
divisor = 97;
#else
# error CONFIG_S3C44B0_CLOCK_SPEED undefined
#endif /* break; */
case 57600:
#if CONFIG_S3C44B0_CLOCK_SPEED==66
divisor = 64;
#elif CONFIG_S3C44B0_CLOCK_SPEED==75
divisor = 80;
#elif CONFIG_S3C44B0_CLOCK_SPEED==64
divisor = 68;
#else
# error CONFIG_S3C44B0_CLOCK_SPEED undefined
#endif /* break; */
case 115200:
#if CONFIG_S3C44B0_CLOCK_SPEED==66
divisor = 32;
#elif CONFIG_S3C44B0_CLOCK_SPEED==75
divisor = 40;
#elif CONFIG_S3C44B0_CLOCK_SPEED==64
divisor = 34;
#else
# error CONFIG_S3C44B0_CLOCK_SPEED undefined
#endif /* break; */
}
serial_flush_output();
serial_flush_input();
UFCON0 = 0x0;
ULCON0 = 0x03;
UCON0 = 0x245;
UBRDIV0 = divisor;
UFCON1 = 0x0;
ULCON1 = 0x03;
UCON1 = 0x245;
UBRDIV1 = divisor;
for(divisor=0; divisor<100; divisor++) {
/* NOP */
}
}
至此，CPU配置完成。下一步，修改电路板配置。
4) 进入armsys/44B0文件夹，开始配置44B0电路板。
A. 修改lowlevel_init.S。lowlevel_init.S是有关外部设备的读写时序、延时的配置文件，可以用LIYUTAI的配置就可以了。（LIYUTAI的RAM配置不是太好，但是还能勉强用上，只是慢一点点而已。）
.equ B0_Tacs, 0x0 /* 0clk */
.equ B0_Tcos, 0x1 /* 0clk */
.equ B0_Tacc, 0x6 /* 10clk */
.equ B0_Tcoh, 0x1 /* 0clk */
.equ B0_Tah, 0x0 /* 0clk */
.equ B0_Tacp, 0x0 /* 0clk */
.equ B0_PMC, 0x0 /* normal(1data) */
/* Bank 1 parameter */
.equ B1_Tacs, 0x3 /* 4clk */
.equ B1_Tcos, 0x3 /* 4clk */
.equ B1_Tacc, 0x7 /* 14clkv */
.equ B1_Tcoh, 0x3 /* 4clk */
.equ B1_Tah, 0x3 /* 4clk */
.equ B1_Tacp, 0x3 /* 6clk */
.equ B1_PMC, 0x0 /* normal(1data) */
/* Bank 2 parameter */
.equ B2_Tacs, 0x3 /* 4clk */
.equ B2_Tcos, 0x3 /* 4clk */
.equ B2_Tacc, 0x7 /* 14clk */
.equ B2_Tcoh, 0x3 /* 4clk */
.equ B2_Tah, 0x3 /* 4clk */
.equ B2_Tacp, 0x3 /* 6clk */
.equ B2_PMC, 0x0 /* normal(1data) */
/* Bank 3 parameter */
.equ B3_Tacs, 0x3 /* 4clk */
.equ B3_Tcos, 0x3 /* 4clk */
.equ B3_Tacc, 0x7 /* 14clk */
.equ B3_Tcoh, 0x3 /* 4clk */
.equ B3_Tah, 0x3 /* 4clk */
.equ B3_Tacp, 0x3 /* 6clk */
.equ B3_PMC, 0x0 /* normal(1data) */
/* Bank 4 parameter */
.equ B4_Tacs, 0x3 /* 4clk */
.equ B4_Tcos, 0x3 /* 4clk */
.equ B4_Tacc, 0x7 /* 14clk */
.equ B4_Tcoh, 0x3 /* 4clk */
.equ B4_Tah, 0x3 /* 4clk */
.equ B4_Tacp, 0x3 /* 6clk */
.equ B4_PMC, 0x0 /* normal(1data) */
/* Bank 5 parameter */
.equ B5_Tacs, 0x3 /* 4clk */
.equ B5_Tcos, 0x3 /* 4clk */
.equ B5_Tacc, 0x7 /* 14clk */
.equ B5_Tcoh, 0x3 /* 4clk */
.equ B5_Tah, 0x3 /* 4clk */
.equ B5_Tacp, 0x3 /* 6clk */
.equ B5_PMC, 0x0 /* normal(1data) */
/* Bank 6(if SROM) parameter */
.equ B6_Tacs, 0x3 /* 4clk */
.equ B6_Tcos, 0x3 /* 4clk */
.equ B6_Tacc, 0x7 /* 14clk */
.equ B6_Tcoh, 0x3 /* 4clk */
.equ B6_Tah, 0x3 /* 4clk */
.equ B6_Tacp, 0x3 /* 6clk */
.equ B6_PMC, 0x0 /* normal(1data) */
/* Bank 7(if SROM) parameter */
.equ B7_Tacs, 0x3 /* 4clk */
.equ B7_Tcos, 0x3 /* 4clk */
.equ B7_Tacc, 0x7 /* 14clk */
.equ B7_Tcoh, 0x3 /* 4clk */
.equ B7_Tah, 0x3 /* 4clk */
.equ B7_Tacp, 0x3 /* 6clk */
.equ B7_PMC, 0x0 /* normal(1data) */
/* Bank 6 parameter */
.equ B6_MT, 0x3 /* SDRAM */
.equ B6_Trcd, 0x1 /* 2clk */
.equ B6_SCAN, 0x0 /* 10bit */
.equ B7_MT, 0x3 /* SDRAM */
.equ B7_Trcd, 0x1 /* 2clk */
.equ B7_SCAN, 0x0 /* 10bit */
/* REFRESH parameter */
.equ REFEN, 0x1 /* Refresh enable */
.equ TREFMD, 0x0 /* CBR(CAS before RAS)/Auto refresh */
.equ Trp, 0x1 /* 2clk */
.equ Trc, 0x1 /* 0x1=5clk 0x3=11clk*/
.equ Tchr, 0x2 /* 0x2=3clk 0x0=0clks */
.equ REFCNT, 1050 //;period=15.6us, MCLK=64Mhz
MEMORY_CONFIG:
.long 0x11010101 /* Bank0 = OM[1:0] , Bank1-7 16bit, Bank2=Nowait,UB/LB*/
.word ((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC)) /*GCS0*/
.word ((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC)) /*GCS1*/
.word ((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC)) /*GCS2*/
.word ((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC)) /*GCS3*/
.word ((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC)) /*GCS4*/
.word ((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC)) /*GCS5*/
.word ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN)) /*GCS6*/
.word ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN)) /*GCS7*/
.word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT) /*REFRESH RFEN=1, TREFMD=0, trp=3clk, trc=5clk, tchr=3clk,count=1019*/
.word 0x17 /*SCLK power down mode, BANKSIZE 16M/16M*/
.word 0x20 /*MRSR6 CL=2clk*/
.word 0x20 /*MRSR7*/
B. 修改44B0.c文件里面的board_init函数，这个函数是U-BOOT完成底层初始化之后进入的第一个C函数。
int board_init (void)
{
//CAUTION:Follow the configuration order for setting the ports.
// 1) setting value
// 2) setting control register
// 3) configure pull-up resistor.
//16bit data bus configuration
// PORT A GROUP
/* BIT 9 8 7 6 5 4 3 2 1 0 */
/* A24 A23 A22 A21 A20 A19 A18 A17 A16 A0 */
/* 1 1 1 1 1 1 1 1 1 1 */
PCONA = 0x3ff;
// PORT B GROUP
/* BIT 10 9 8 7 6 5 4 3 2 1 0 */
/* /CS5 /CS4 /CS3 /CS2 /CS1 nWBE3 nWBE2 /SRAS /SCAS SCLK SCKE */
/* EXT NIC USB IDE SMC NC NC Sdram Sdram Sdram Sdram */
/* 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 */
PDATB = 0x7ff;
PCONB = 0x7cf;
//PORT C GROUP
//BUSWIDTH=16 */
/* PC15 14 13 12 11 10 9 8 */
/* I O RXD1 TXD1 I I I I */
/* PS2DAT DCLK Uart1 Uart1 NC NC NC NC */
/* 00 01 11 11 00 00 00 00 */
/* PC7 6 5 4 3 2 1 0 */
/* I I I I I I I I */
/* VD4 VD5 VD6 VD7 SMCALE SMCCLE SMCCE SMCRB*/
/* 00 00 00 00 01 01 01 00 */
PDATC = 0xffff; //All IO is high
PCONC = 0x1f05ff54;
PUPC = 0x3000; //PULL UP RESISTOR should be enabled to I/O
//PORT D GROUP
/* PORT D GROUP(I/O OR LCD) */
/* BIT 7 6 5 4 3 2 1 0 */
/* VF VM VLINE VCLK VD3 VD2 VD1 VD0 */
/* 00 00 00 00 00 00 00 00 */
PDATD= 0xff;
PCOND= 0xaaaa;
PUPD = 0x0;
//These pins must be set only after CPU's internal LCD controller is enable
//PORT E GROUP
/* Bit 8 7 6 5 4 3 2 1 0 */
/* LcdBL LED4 LED5 LED6 LED7 BEEP RXD0 TXD0 LcdDisp */
/* 01 01 01 01 01 01 10 10 01 */
PDATE = 0x1ff;
PCONE = 0x25569;
PUPE = 0x6;
//PORT F GROUP
/* Bit8 7 6 5 4 3 2 1 0 */
/* IISCLK IISDI IISDO IISLRCK Input Input Input IICSDA IICSCL */
/* 100 100 100 100 00 00 00 10 10 */
PDATF = 0x0;
PCONF = 0x24900a;
PUPF = 0x1e3;
//PORT G GROUP
/* BIT7 6 5 4 3 2 1 0 */
/* INT7 INT6 INT5 INT4 INT3 INT2 INT1 INT0 */
/* S3 S4 S5 S6 NIC EXT IDE USB */
/* 11 11 11 11 11 11 11 11 */
//rPDATG = 0xff;
//rPCONG = 0xffff;
PCONG = 0x00ff; //EXINT0~3 enabled
PUPG = 0x0; //pull-up regiseter should be enabled
SPUCR=0x7; //D15-D0 pull-up disable
/*均为低电平触发,Exint3设置为上升沿触发----modify at 04-12-11*/
EXTINT=0x0|(1<<14);
return 0;
}
可以直接使用LIYUTAI的端口初始化函数来代替就可以了。
C. 修改Makefile文件，把B2.o替换为44B0.o
D. 修改config.mk文件，把TEXT_BASE的值改成0x0C300000。这个只是为了预留2M的空间来下载内核。U-BOOT启动时会把代码拷贝到TEXT_BASE的位置上，如果不修改这个值，下载大一点的代码就会死机的。
E. 修改board/armsys/common/flash.c的配置，增加flash支持。
flash.c:
case (CFG_FLASH_WORD_SIZE)SST_ID_xF160A:
case (CFG_FLASH_WORD_SIZE)SST_ID_xF1601:
并替换所有B2为44B0，这样才能在编译的时候编译进去
至此，44B0的电路板已经配置完成。接着就修改配置文件。
5) 修改include/configs/44B0.h文件。
以下是我的整个44B0.h配置文件
#ifndef __CONFIG_H
#define __CONFIG_H
/*
* High Level Configuration Options
* (easy to change)
*/
#define CONFIG_ARM7 1 /* This is a ARM7 CPU */
#define CONFIG_44B0 1 /* on an 44B0 Board */
#define CONFIG_ARM_THUMB 1 /* this is an ARM7TDMI */
#undef CONFIG_ARM7_REVD /* disable ARM720 REV.D Workarounds */
#define CONFIG_S3C44B0_CLOCK_SPEED 64 /* we have a 75Mhz S3C44B0*/
//#define CONFIG_MEM_TEST //do ram test
#define CONFIG_SILENT_CONSOLE 1 //config with silent
#undef CONFIG_USE_IRQ /* don't need them anymore */
/*
* Size of malloc() pool
*/
#define CFG_MONITOR_LEN (256 * 1024) /* Reserve 256 kB for Monitor */
#define CFG_ENV_SIZE 1024 /* 1024 bytes may be used for env vars*/
#define CFG_MALLOC_LEN (CFG_ENV_SIZE + 128*1024 )
#define CFG_GBL_DATA_SIZE 128 /* size in bytes reserved for initial data */
/*
* Hardware drivers
*/
//#define CONFIG_DRIVER_LAN91C96
//#define CONFIG_LAN91C96_BASE 0x04000300 /* base address */
//#define CONFIG_SMC_USE_32_BIT
//#undef CONFIG_SHOW_ACTIVITY
//#define CONFIG_NET_RETRY_COUNT 10 /* # of retries */
#define CONFIG_DRIVER_RTL8019
#define RTL8019_BASE 0x08000000
//#define ET_DEBUG //DEBUG the ethernet
/*
* select serial console configuration
*/
#define CONFIG_SERIAL1 1 /* we use Serial line 1 */
/* allow to overwrite serial and ethaddr */
#define CONFIG_ENV_OVERWRITE
#define CONFIG_BAUDRATE 115200
/*
* BOOTP options
*/
#define CONFIG_BOOTP_SUBNETMASK
#define CONFIG_BOOTP_GATEWAY
#define CONFIG_BOOTP_HOSTNAME
#define CONFIG_BOOTP_BOOTPATH
#define CONFIG_BOOTP_BOOTFILESIZE
/*
* Command line configuration.
*/
#include
#define CONFIG_CMD_DATE
#define CONFIG_CMD_ELF
//#define CONFIG_CMD_EEPROM
//#define CONFIG_CMD_I2C
#define CONFIG_CMD_PING //ping cmd enable
#define CONFIG_CMD_FLASH //nor flash support
//#define CONFIG_CMD_NAND //nand flash support
#define CONFIG_BOOTDELAY 1
#define CONFIG_ETHADDR 00:50:c2:1e:af:fb
#define CONFIG_BOOTARGS "setenv bootargs root=/dev/ram ip=192.168.1000.70:::::eth0:off \
ether=25,0,0,0,eth0 ethaddr=00:50:c2:1e:af:fb"
#define CONFIG_NETMASK 255.255.255.0
#define CONFIG_IPADDR 192.168.100.70
#define CONFIG_SERVERIP 192.168.100.163
#define CONFIG_BOOTFILE "image.ram"
//#define CONFIG_BOOTCOMMAND "bootm 20000 f0000"
//#define CONFIG_BOOTCOMMAND "base 0" //for debuging
#define CONFIG_BOOTCOMMAND "?" //for debuging
/*
* Miscellaneous configurable options
*/
#define CFG_LONGHELP /* undef to save memory */
#define CFG_PROMPT "U-Boot(Ken Wu)> " /* Monitor Command Prompt */
#define CFG_CBSIZE 256 /* Console I/O Buffer Size */
#define CFG_PBSIZE (CFG_CBSIZE+sizeof(CFG_PROMPT)+16) /* Print Buffer Size */
#define CFG_MAXARGS 16 /* max number of command args */
#define CFG_BARGSIZE CFG_CBSIZE /* Boot Argument Buffer Size */
#define CFG_MEMTEST_START 0x0C400000 /* memtest works on */
#define CFG_MEMTEST_END 0x0C800000 /* 4 ... 8 MB in DRAM */
#undef CFG_CLKS_IN_HZ /* everything, incl board info, in Hz */
#define CFG_LOAD_ADDR 0x0c008000 /* default load address */
#define CFG_HZ 1000 /* 1 kHz */
/* valid baudrates */
#define CFG_BAUDRATE_TABLE { 9600, 19200, 38400, 57600, 115200 }
/*-----------------------------------------------------------------------
* Stack sizes
*
* The stack sizes are set up in start.S using the settings below
*/
#define CONFIG_STACKSIZE (128*1024) /* regular stack */
#ifdef CONFIG_USE_IRQ
#define CONFIG_STACKSIZE_IRQ (4*1024) /* IRQ stack */
#define CONFIG_STACKSIZE_FIQ (4*1024) /* FIQ stack */
#endif
/*-----------------------------------------------------------------------
* 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 CONFIG_HAS_DATAFLASH //we have flash
#define PHYS_FLASH_1 0x00000000 /* Flash Bank #1 */
#define PHYS_FLASH_SIZE 0x00200000 /* 2 MB */
//#define CFG_FLASH_BASE PHYS_FLASH_1
/*-----------------------------------------------------------------------
* FLASH and environment organization
*/
/*-----------------------------------------------------------------------
* FLASH organization
*/
#define CFG_MAX_FLASH_BANKS 1 /* max number of memory banks */
#define CFG_MAX_FLASH_SECT 32 /* max number of sectors on one chip */
#define FLASH_BLOCK_SIZE 0x00010000 //flash的block大小
#define CFG_FLASH_ERASE_TOUT 120000 /* Timeout for Flash Erase (in ms) */
#define CFG_FLASH_WRITE_TOUT 1000 /* Timeout for Flash Write (in ms) */
#define CFG_FLASH_WORD_SIZE unsigned short /* flash word size (width) */
#define CFG_FLASH_ADDR0 0x5555 /* 1st address for flash config cycles */
#define CFG_FLASH_ADDR1 0x2AAA /* 2nd address for flash config cycles */
/*
* The following defines are added for buggy IOP480 byte interface.
* All other boards should use the standard values (CPCI405 etc.)
*/
#define CFG_FLASH_READ0 0x0000 /* 0 is standard */
#define CFG_FLASH_READ1 0x0001 /* 1 is standard */
#define CFG_FLASH_READ2 0x0002 /* 2 is standard */
#define CFG_FLASH_EMPTY_INFO /* print 'E' for empty sector on flinfo */
/**
* NAND flash organization & operation
*/
#if defined(CONFIG_CMD_NAND)
#define NAND_DEBUG 1 //debug the nand info
#define CFG_NAND_LEGACY
#define CFG_NAND_BASE 0x02000000
#define CFG_MAX_NAND_DEVICE 1 /* Max number of NAND devices */
#define SECTORSIZE 512
#define ADDR_COLUMN 1
#define ADDR_PAGE 2
#define ADDR_COLUMN_PAGE 3
#define NAND_ChipID_UNKNOWN 0x00
#define NAND_MAX_FLOORS 1
#define NAND_MAX_CHIPS 1
#define NAND_WAIT_READY(nand) WAIT_RB()
#define NAND_DISABLE_CE(nand) ST_INVALID()
#define NAND_ENABLE_CE(nand)
#define WRITE_NAND_COMMAND(d, adr) NAND_write_cmd(d)
//#define WRITE_NAND_COMMANDW(d, adr) NF_CmdW(d)
#define WRITE_NAND_ADDRESS(d, adr) NAND_write_addr(d)
#define WRITE_NAND(d, adr) NAND_write(d)
#define READ_NAND(adr) NAND_read()
/*
* the following functions are NOP's because S3C24X0 handles this in hardware
* but it must define in S344B0 board because the board does not support the interface
*/
#define NAND_CTL_CLRALE(nandptr)
#define NAND_CTL_SETALE(nandptr)
#define NAND_CTL_CLRCLE(nandptr)
#define NAND_CTL_SETCLE(nandptr)
//do not use write verify and jffs2 ecc at first
//#define CONFIG_MTD_NAND_VERIFY_WRITE 1
//#define CONFIG_MTD_NAND_ECC_JFFS2 1
#endif
/*-----------------------------------------------------------------------
* Environment Variable setup
*/
//#define CFG_ENV_IS_IN_EEPROM 1 /* use EEPROM for environment vars */
//#define CFG_ENV_OFFSET 0x0 /* environment starts at the beginning of the EEPROM */
#define CFG_ENV_IS_IN_FLASH 1
#undef CFG_ENV_IS_NOWHERE
#define CFG_FLASH_BASE PHYS_FLASH_1
#define CFG_ENV_OFFSET 0x100000 //从0x10000处开始保存系统参数
//#define CFG_ENV_ADDR (CFG_FLASH_BASE + 0x20000) /* environment start address */
#define CFG_ENV_SECT_SIZE 0x10000 /* Total Size of Environment Sector */
//#define CFG_MONITOR_BASE PHYS_SDRAM_1
/*-----------------------------------------------------------------------
* I2C EEPROM (STM24C02W6) for environment
*/
//#define CONFIG_HARD_I2C /* I2c with hardware support */
//#define CFG_I2C_SPEED 400000 /* I2C speed and slave address */
//#define CFG_I2C_SLAVE 0xFE
//
//#define CFG_I2C_EEPROM_ADDR 0xA8 /* EEPROM STM24C02W6 */
//#define CFG_I2C_EEPROM_ADDR_LEN 1 /* Bytes of address */
///* mask of address bits that overflow into the "EEPROM chip address" */
///*#define CFG_I2C_EEPROM_ADDR_OVERFLOW 0x07*/
//#define CFG_EEPROM_PAGE_WRITE_BITS 4 /* The Catalyst CAT24WC08 has */
/* 16 byte page write mode using*/
/* last 4 bits of the address */
//#define CFG_EEPROM_PAGE_WRITE_DELAY_MS 10 /* and takes up to 10 msec */
//#define CFG_EEPROM_PAGE_WRITE_ENABLE
/* Flash banks JFFS2 should use */
/*
#define CFG_JFFS2_FIRST_BANK 0
#define CFG_JFFS2_FIRST_SECTOR 2
#define CFG_JFFS2_NUM_BANKS 1
*/
/*
Linux TAGs (see lib_arm/armlinux.c)
*/
#define CONFIG_CMDLINE_TAG
#undef CONFIG_SETUP_MEMORY_TAGS
#define CONFIG_INITRD_TAG
#endif /* __CONFIG_H */
至此，配置已经完成，可以make出镜像来了！！J
6) make镜像
make 44B0_config
make CROSS_COMPILE=arm-linux-
（一大堆编译信息飘过。。。）
最后，你就可以看到u-boot.bin镜像文件了。烧进flash里面就可以直接运行了！^_^
五、增加网络支持
由于linux镜像文件动则就有几百k，如果每次都用串口来传就太慢了。LIYUTAI的板子用的是RTL8019，U-BOOT上面直接有驱动，只要改一下就可以用了！（狂喜！！！）
1) 修改drivers/net/rtl8019.h
#include
#ifdef CONFIG_DRIVER_RTL8019
#define ETH_ADDR_SFT (8)
#define EI_SHIFT(x) ((x)<
#define RTL8019_REG_00 (RTL8019_BASE + EI_SHIFT(0x00))
#define RTL8019_REG_01 (RTL8019_BASE + EI_SHIFT(0x01))
#define RTL8019_REG_02 (RTL8019_BASE + EI_SHIFT(0x02))
#define RTL8019_REG_03 (RTL8019_BASE + EI_SHIFT(0x03))
#define RTL8019_REG_04 (RTL8019_BASE + EI_SHIFT(0x04))
#define RTL8019_REG_05 (RTL8019_BASE + EI_SHIFT(0x05))
#define RTL8019_REG_06 (RTL8019_BASE + EI_SHIFT(0x06))
#define RTL8019_REG_07 (RTL8019_BASE + EI_SHIFT(0x07))
#define RTL8019_REG_08 (RTL8019_BASE + EI_SHIFT(0x08))
#define RTL8019_REG_09 (RTL8019_BASE + EI_SHIFT(0x09))
#define RTL8019_REG_0a (RTL8019_BASE + EI_SHIFT(0x0a))
#define RTL8019_REG_0b (RTL8019_BASE + EI_SHIFT(0x0b))
#define RTL8019_REG_0c (RTL8019_BASE + EI_SHIFT(0x0c))
#define RTL8019_REG_0d (RTL8019_BASE + EI_SHIFT(0x0d))
#define RTL8019_REG_0e (RTL8019_BASE + EI_SHIFT(0x0e))
#define RTL8019_REG_0f (RTL8019_BASE + EI_SHIFT(0x0f))
#define RTL8019_REG_10 (RTL8019_BASE + EI_SHIFT(0x10))
#define RTL8019_REG_1f (RTL8019_BASE + EI_SHIFT(0x1f))
#define RTL8019_COMMAND RTL8019_REG_00
#define RTL8019_PAGESTART RTL8019_REG_01
#define RTL8019_PAGESTOP RTL8019_REG_02
#define RTL8019_BOUNDARY RTL8019_REG_03
#define RTL8019_TRANSMITSTATUS RTL8019_REG_04
#define RTL8019_TRANSMITPAGE RTL8019_REG_04
#define RTL8019_TRANSMITBYTECOUNT0 RTL8019_REG_05
#define RTL8019_NCR RTL8019_REG_05
#define RTL8019_TRANSMITBYTECOUNT1 RTL8019_REG_06
#define RTL8019_INTERRUPTSTATUS RTL8019_REG_07
#define RTL8019_CURRENT RTL8019_REG_07
#define RTL8019_REMOTESTARTADDRESS0 RTL8019_REG_08
#define RTL8019_CRDMA0 RTL8019_REG_08
#define RTL8019_REMOTESTARTADDRESS1 RTL8019_REG_09
#define RTL8019_CRDMA1 RTL8019_REG_09
#define RTL8019_REMOTEBYTECOUNT0 RTL8019_REG_0a
#define RTL8019_REMOTEBYTECOUNT1 RTL8019_REG_0b
#define RTL8019_RECEIVESTATUS RTL8019_REG_0c
#define RTL8019_RECEIVECONFIGURATION RTL8019_REG_0c
#define RTL8019_TRANSMITCONFIGURATION RTL8019_REG_0d
#define RTL8019_FAE_TALLY RTL8019_REG_0d
#define RTL8019_DATACONFIGURATION RTL8019_REG_0e
#define RTL8019_CRC_TALLY RTL8019_REG_0e
#define RTL8019_INTERRUPTMASK RTL8019_REG_0f
#define RTL8019_MISS_PKT_TALLY RTL8019_REG_0f
#define RTL8019_PHYSICALADDRESS0 RTL8019_REG_01
#define RTL8019_PHYSICALADDRESS1 RTL8019_REG_02
#define RTL8019_PHYSICALADDRESS2 RTL8019_REG_03
#define RTL8019_PHYSICALADDRESS3 RTL8019_REG_04
#define RTL8019_PHYSICALADDRESS4 RTL8019_REG_05
#define RTL8019_PHYSICALADDRESS5 RTL8019_REG_06
#define RTL8019_MULTIADDRESS0 RTL8019_REG_08
#define RTL8019_MULTIADDRESS1 RTL8019_REG_09
#define RTL8019_MULTIADDRESS2 RTL8019_REG_0a
#define RTL8019_MULTIADDRESS3 RTL8019_REG_0b
#define RTL8019_MULTIADDRESS4 RTL8019_REG_0c
#define RTL8019_MULTIADDRESS5 RTL8019_REG_0d
#define RTL8019_MULTIADDRESS6 RTL8019_REG_0e
#define RTL8019_MULTIADDRESS7 RTL8019_REG_0f
#define RTL8019_DMA_DATA RTL8019_REG_10
#define RTL8019_RESET RTL8019_REG_1f
#define RTL8019_PAGE0 0x22
#define RTL8019_PAGE1 0x62
#define RTL8019_PAGE0DMAWRITE 0x12
#define RTL8019_PAGE2DMAWRITE 0x92
#define RTL8019_REMOTEDMAWR 0x12
#define RTL8019_REMOTEDMARD 0x0A
#define RTL8019_ABORTDMAWR 0x32
#define RTL8019_ABORTDMARD 0x2A
#define RTL8019_PAGE0STOP 0x21
#define RTL8019_PAGE1STOP 0x61
#define RTL8019_TRANSMIT 0x26
#define RTL8019_TXINPROGRESS 0x04
#define RTL8019_SEND 0x1A
#define RTL8019_PSTART 0x4c
#define RTL8019_PSTOP 0x80
#define RTL8019_TPSTART 0x40
#endif /*end of CONFIG_DRIVER_RTL8019*/
2) 修改drivers/net/rtl8019.c
调试网络的时候一直不通，后来调试之后发现原来是rtl8019.c出问题了。不知道为什么put_reg函数就有volatile而get_reg就没有，问题就出现在这里了。加上去，OK！
static unsigned char get_reg (unsigned int regno)
{
return (*(volatile unsigned char *) regno);
}
六、调试U-BOOT
为了调试U-BOOT，我真的详尽了办法，试了好多种方法都不能进行源码级的调试。后来发现了用RVDK可以在window下面进行调试，方法如下：（后来发现原来可以用skyeye来调试，连板子都可以不用上！谢谢skyeye的做着为我们提供这么好的平台）
修改arm_config.mk文件，增加-gdwarf选项
#PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__
#debug
PLATFORM_CPPFLAGS += -DCONFIG_ARM -D__ARM__ -gdwarf-2
接着在RVDK上面就可以进行源码级的调试了。爽啊~~~
七、后记
在此要谢谢samfei的移植文档()，基本上对照着就能够完成u-boot-1.1.6。现在我把它移植到1.3.2，希望对新手有帮助。如果手上没有补丁文件，可以来信索取(E-mail: )
2008-06-30 于佛山
八、附：打补丁的方法
取得补丁之后，可以直接给U-BOOT打补丁，直接得到需要的目标。
1) 把补丁文件放到与U-BOOT目录同级的位置
2) 进入U-BOOT目录
[root@localhost ken]# cd u-boot-1.3.2
[root@localhost u-boot-1.3.2]#
3) 打补丁（如果文件是gz格式）
[root@localhost u-boot-1.3.2]# gzip -dc ../u-boot-1.3.2-kenwucn.patch.gz | patch -p1
（以下为终端输出信息）
patching file arm_config.mk
patching file board/armsys/44B0/44B0.c
patching file board/armsys/44B0/config.mk
patching file board/armsys/44B0/flash.c
patching file board/armsys/44B0/lowlevel_init.S
patching file board/armsys/44B0/Makefile
patching file board/armsys/44B0/u-boot.lds
patching file board/armsys/common/flash.c
patching file board/armsys/common/fpga.c
patching file board/armsys/common/nand.c
patching file board/armsys/common/nand.h
patching file board/armsys/common/pci.c
patching file board/bf533-ezkit/.gitignore
patching file board/bf533-stamp/.gitignore
patching file board/bf537-stamp/.gitignore
patching file board/bf561-ezkit/.gitignore
patching file common/cmd_mem.c
patching file common/cmd_nand.c
patching file common/cmd_net.c
patching file common/dlmalloc.c
patching file cpu/s3c44b0/interrupts.c
patching file cpu/s3c44b0/serial.c
patching file cpu/s3c44b0/start.S
patching file drivers/mtd/nand/nand.c
patching file drivers/mtd/nand/nand_ids.c
patching file drivers/mtd/nand_legacy/nand_legacy.c
patching file drivers/net/8390.h
patching file drivers/net/ne2000.c
patching file drivers/net/ne2000.h
patching file drivers/net/rtl8019.c
patching file drivers/net/rtl8019.h
patching file examples/.gitignore
patching file .gdbtkinit
patching file .gitignore
patching file include/configs/44B0.h
patching file include/.gitignore
patching file include/linux/mtd/nand_ids.h
patching file include/net.h
patching file Makefile
patching file net/eth.c
patching file net/Makefile
patching file net/net.c
patching file net/tftp.c
patching file tools/.gitignore
4) 打补丁（如果文件是文本格式（以patch结尾））
[root@localhost u-boot-1.3.2]# patch -p1 < ../u-boot-1.3.2-kenwucn.patch
（以下为终端输出信息）
patching file arm_config.mk
patching file board/armsys/44B0/44B0.c
patching file board/armsys/44B0/config.mk
patching file board/armsys/44B0/flash.c
patching file board/armsys/44B0/lowlevel_init.S
patching file board/armsys/44B0/Makefile
patching file board/armsys/44B0/u-boot.lds
patching file board/armsys/common/flash.c
patching file board/armsys/common/fpga.c
patching file board/armsys/common/nand.c
patching file board/armsys/common/nand.h
patching file board/armsys/common/pci.c
patching file board/bf533-ezkit/.gitignore
patching file board/bf533-stamp/.gitignore
patching file board/bf537-stamp/.gitignore
patching file board/bf561-ezkit/.gitignore
patching file common/cmd_mem.c
patching file common/cmd_nand.c
patching file common/cmd_net.c
patching file common/dlmalloc.c
patching file cpu/s3c44b0/interrupts.c
patching file cpu/s3c44b0/serial.c
patching file cpu/s3c44b0/start.S
patching file drivers/mtd/nand/nand.c
patching file drivers/mtd/nand/nand_ids.c
patching file drivers/mtd/nand_legacy/nand_legacy.c
patching file drivers/net/8390.h
patching file drivers/net/ne2000.c
patching file drivers/net/ne2000.h
patching file drivers/net/rtl8019.c
patching file drivers/net/rtl8019.h
patching file examples/.gitignore
patching file .gdbtkinit
patching file .gitignore
patching file include/configs/44B0.h
patching file include/.gitignore
patching file include/linux/mtd/nand_ids.h
patching file include/net.h
patching file Makefile
patching file net/eth.c
patching file net/Makefile
patching file net/net.c
patching file net/tftp.c
patching file tools/.gitignore
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