移植 u-boot-1.1.6 到 FL2440(1)---实现基本功能
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一、建立开发板相关的目录/文件
$ tar -xjf u-boot-1.1.6.tar.bz2
$ cd u-boot-1.1.6/board
$ cp -r smdk2410 100ask24x0
$ cd 100ask24x0
$ mv smdk2410.c 100ask24x0.c
$ cd ../../include/configs
$ cp smdk2410.h 100ask24x0.h
二、修改 Makefile 文件
1.修改顶层 Makefile 文件，在其中加入下面2行:
100ask24x0_config : unconfig
@$(MKCONFIG) $(@:_config=) arm arm920t 100ask24x0 NULL s3c24x0
2.修改 board/100ask24x0/Makefile
COBJS := 100ask24x0.o flash.o
SOBJS := lowlevel_init.o
3.初次编译
$ make 100ask24x0_config
$ make
编译成功的话，顶层目录下面就有 u-boot.bin 等文件了。最重要的是，这说明我们的交叉编译工具链已经没有问题了。
三、增加2个新文件
1.新建文件 u-boot-1.1.6/board/100ask24x0/boot_init.c（参考u-boot-1.1.6_jz2440/board/100ask24x0/boot_init.c）
2.修改 u-boot-1.1.6/board/100ask24x0/Makefile
COBJS := 100ask24x0.o flash.o
改为
COBJS := 100ask24x0.o boot_init.o
3.修改 u-boot-1.1.5/board/100ask24x0/u-boot.lds
cpu/arm920t/start.o(.text)
board/100ask24x0/boot_init.o (.text)
*(.text)
4.新建文件 u-boot-1.1.6/cpu/arm920t/s3c24x0/nand_flash.c（参考u-boot-1.1.6_jz2440/cpu/arm920t/s3c24x0/nand_flash.c）
5.修改 u-boot-1.1.6/cpu/arm920t/s3c24x0/Makefile
COBJS= i2c.o interrupts.o serial.o speed.o \
usb_ohci.o nand_flash.o
四、修改 u-boot-1-1.6/board/100ask24x0/lowlevel_init.S 文件
1.将54-58行的：
#define B1_BWSCON (DW32)
#define B2_BWSCON (DW16)
#define B3_BWSCON (DW16 + WAIT + UBLB)
#define B4_BWSCON (DW16)
#define B5_BWSCON (DW16)
改为
#define B1_BWSCON (DW16)
#define B2_BWSCON (DW16)
#define B3_BWSCON (DW16 +UBLB)
#define B4_BWSCON (DW16 + WAIT + UBLB)
#define B5_BWSCON (DW8)
2.将97-101行的：
#define B4_Tcos0x0/* 0clk */
#define B4_Tacc 0x7/* 14clk */
#define B4_Tcoh 0x0/* 0clk */
#define B4_Tah 0x0/* 0clk */
#define B4_Tacp 0x0
改为
#define B4_Tcos0x3/* 4clk */
#define B4_Tacc 0x7/* 14clk */
#define B4_Tcoh 0x1/* 1clk */
#define B4_Tah 0x3/* 4clk */
#define B4_Tacp 0x6 /* 6clk */
3.将126行的：
#define REFCNT1113/* period=15.6us, HCLK=60Mhz, (2048+1-15.6*60) */
改为
#define REFCNT0x4f4/* period=7.8125us, HCLK=100Mhz, (2048+1-7.8125*100) */
4.将165行的：
.word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)
.word 0x32
.word 0x30
改为
.word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)
.word 0xb1
.word 0x30
五、修改 u-boot-1.1.6/board/100ask24x0/100ask24x0.c
#include <common.h>
#include <s3c2410.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Miscellaneous platform dependent initialisations
*/
int board_init (void)
{
S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
/* set up the I/O ports */
gpio->GPACON = 0x007FFFFF;
gpio->GPBCON = 0x00000000;
gpio->GPBUP = 0x00000000; /* 启用上拉电阻 */
//gpio->GPBDAT |= (1 << 5);
gpio->GPCCON = 0xAAAAAAAA;
gpio->GPCUP = 0x0000FFFF;
gpio->GPDCON = 0xAAAAAAAA;
gpio->GPDUP = 0x0000FFFF;
gpio->GPECON = 0xAAAAAAAA;
gpio->GPEUP = 0x0000FFFF;
gpio->GPFCON = 0x000055AA;
gpio->GPFUP = 0x000000FF;
gpio->GPGCON = 0xFF95FFBA;
gpio->GPGUP = 0x0000FFFF;
gpio->GPHCON = 0x002AFAAA;
gpio->GPHUP = 0x000007FF;
/* support both of S3C2410 and S3C2440, by www.100ask.net */
if (isS3C2410)
{
/* arch number of SMDK2410-Board */
gd->bd->bi_arch_number = MACH_TYPE_SMDK2410;
}
else
{
/* arch number of SMDK2440-Board */
gd->bd->bi_arch_number = MACH_TYPE_S3C2440;
}
/* adress of boot parameters */
gd->bd->bi_boot_params = 0x30000100;
#if 0
icache_enable();
dcache_enable();
#endif
return 0;
}
int dram_init (void)
{
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
return 0;
}
六、修改 u-boot-1.1.6/cpu/arm920t/s3c24x0/interrupts.c（copy自jz2440）
七、修改 u-boot-1.1.6/cpu/arm920t/s3c24x0/speed.c（copy自jz2440）
八、修改 u-boot-1.1.6/include/cmd_confdefs.h
//#define CFG_CMD_FLASH0x00000020ULL/* flinfo, erase, protect*/
//#define CFG_CMD_IMLS0x0020000000000000ULL/* List all found images*/
九、修改 u-boot-1.1.6/cpu/arm920t/start.S
1.注释掉时钟频率的初始化（其初始化放在堆栈建立后的 C 代码中）
#if 0
/* FCLK:HCLK:PCLK = 1:2:4 */
/* default FCLK is 120 MHz ! */
ldr r0, =CLKDIVN
mov r1, #3
str r1, [r0]
#endif
2.把建立堆栈代码放在重定位（relocate）代码前，以使用 C 代码来完成重定位的工作
/*
* we do sys-critical inits only at reboot,
* not when booting from ram!
*/
#ifndef CONFIG_SKIP_LOWLEVEL_INIT
bl cpu_init_crit
#endif
/* 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 */
#ifndef CONFIG_SKIP_LOWLEVEL_INIT
bl clock_init /* ³õʼ»¯Ê±ÖÓƵÂÊ */
#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 clear_bss
ldr r2, _armboot_start
ldr r3, _bss_start
sub r2, r3, r2/* r2 <- size of armboot */
#if 1
bl CopyCode2Ram/* r0:source, r1:dest, r2:size */
#else
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
#endif
#endif /* CONFIG_SKIP_RELOCATE_UBOOT */
clear_bss:
ldr r0, _bss_start/* find start of bss segment */
ldr r1, _bss_end/* stop here */
mov r2, #0x00000000/* clear */
clbss_l:str r2, [r0]/* clear loop... */
add r0, r0, #4
cmp r0, r1
ble clbss_l
SetLoadFlag:
/* Set a global flag, PreLoadedONRAM */
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 */
ldr r2, =PreLoadedONRAM
mov r3, #1
streq r3, [r2]
#if 0
/* try doing this stuff after the relocation */
ldr r0, =pWTCON
mov r1, #0x0
str r1, [r0]
十、修改 u-boot-1.1.6/include/configs/100ask24x0.h
1.为支持 DM9000 网卡，将
#define CONFIG_DRIVER_CS89001/* we have a CS8900 on-board */
#define CS8900_BASE 0x19000300
#define CS8900_BUS16 1 /* the Linux driver does accesses as shorts */
改为
//#define CONFIG_DRIVER_CS89001/* we have a CS8900 on-board */
//#define CS8900_BASE 0x19000300
//#define CS8900_BUS16 1 /* the Linux driver does accesses as shorts */
#define CONFIG_DRIVER_DM90001
#define CONFIG_DM9000_BASE 0x20000300
#define DM9000_IO CONFIG_DM9000_BASE
#define DM9000_DATA (CONFIG_DM9000_BASE + 4)
#define CONFIG_DM9000_USE_16BIT
2.增加 NAND 命令和 ping 命令，将
/*CFG_CMD_NAND|*/ \
改为
CFG_CMD_PING| \
CFG_CMD_NAND | \
3.设置 IP，将
/*#define CONFIG_ETHADDR08:00:3e:26:0a:5b */
#define CONFIG_NETMASK 255.255.255.0
#define CONFIG_IPADDR 10.0.0.110
#define CONFIG_SERVERIP 10.0.0.1
改为
#define CONFIG_ETHADDR08:00:3e:26:0a:5b
#define CONFIG_NETMASK 255.255.255.0
#define CONFIG_IPADDR 192.168.1.7
#define CONFIG_SERVERIP 192.168.1.6
4.将
#define CFG_FLASH_BASEPHYS_FLASH_1
改为
#define CFG_FLASH_BASEPHYS_FLASH_1
#define CFG_MONITOR_BASE PHYS_FLASH_1
5.NOR FLASH的设置，将
#define CONFIG_AMD_LV4001/* uncomment this if you have a LV400 flash */
#if 0
#define CONFIG_AMD_LV800 1/* uncomment this if you have a LV800 flash */
#endif
改为
#define CFG_NO_FLASH1/* 我的 FL2440 没有 NOR Flash */
#if 0
#define CONFIG_AMD_LV400 1/* uncomment this if you have a LV400 flash */
#endif
//#define CONFIG_AMD_LV800 1/* uncomment this if you have a LV800 flash */
6.把最后几行
/* timeout values are in ticks */
#define CFG_FLASH_ERASE_TOUT (5*CFG_HZ) /* Timeout for Flash Erase */
#define CFG_FLASH_WRITE_TOUT (5*CFG_HZ) /* Timeout for Flash Write */
#define CFG_ENV_IS_IN_FLASH1
#define CFG_ENV_SIZE 0x10000/* Total Size of Environment Sector */
#endif /* __CONFIG_H */
改为
/* 增加对 NOR FLASH 的支持 */
/*
#define CFG_FLASH_CFI 1
#define CFG_FLASH_CFI_DRIVER 1
#define CFG_FLASH_USE_BUFFER_WRITE 1
#define CONFIG_FLASH_CFI_LEGACY 1
*/
#ifdef CFG_FLASH_CFI_DRIVER
#define CFG_MAX_FLASH_SECT 512 /* max number of sectors on one chip */
#define CFG_FLASH_CFI_WIDTH 0x02 /* FLASH_CFI_16BIT */
#endif
/* timeout values are in ticks */
#define CFG_FLASH_ERASE_TOUT (5*CFG_HZ) /* Timeout for Flash Erase */
#define CFG_FLASH_WRITE_TOUT (5*CFG_HZ) /* Timeout for Flash Write */
//#define CFG_ENV_IS_IN_FLASH1
#define CFG_ENV_IS_IN_NAND 1
#define CFG_ENV_OFFSET 0x40000
#define CFG_ENV_SIZE 0x20000/* Total Size of Environment Sector */
/*-----------------------------------------------------------------------
* NAND flash settings
*/
#define CFG_NAND_BASE 0
#define CFG_MAX_NAND_DEVICE 1
#define NAND_MAX_CHIPS 1
#endif /* __CONFIG_H */
十一、修改 u-boot-1.1.6/lib_arm/board.c
1.增加头文件
#include <net.h>
#include <s3c2410.h>
2.变量声明，只是为了点灯方便
void start_armboot (void)
{
S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();
init_fnc_t **init_fnc_ptr;
3.初始化完后点灯
for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
if ((*init_fnc_ptr)() != 0) {
hang ();
}
}
/* 点亮 LED1,LED2 */
gpio->GPBCON = 0x00001400;
//#ifndef CFG_NO_FLASH
#if 0
/* configure available FLASH banks */
size = flash_init ();
4.初始化 NAND FLASH 后点灯
#if (CONFIG_COMMANDS & CFG_CMD_NAND)
puts ("NAND: ");
nand_init(); /* go init the NAND */
#endif
/* 点亮 LED2,LED3 */
gpio->GPBCON = 0x00011000;
5.进入 main_loop 前点灯
/* 点亮 LED3,LED4 */
gpio->GPBCON = 0x00110000;
/* main_loop() can return to retry autoboot, if so just run it again. */
for (;;) {
main_loop ();
}
十二、修改 u-boot-1.1.6/include/s3c2410.h
1.在100行增加函数定义
/* for s3c2440, www.100ask.net */
static inline S3C2440_NAND * const S3C2440_GetBase_NAND(void)
{
return (S3C2440_NAND * const)S3C2410_NAND_BASE;
}
2.在151行增加
/* add by thisway.diy */
#define _ISR_STARTADDRESS ((unsigned)isr_handle_array)
#define ISR_EINT0_OFT 0
#define ISR_EINT1_OFT 1
#define ISR_EINT2_OFT 2
#define ISR_EINT3_OFT 3
#define ISR_EINT4_7_OFT 4
#define ISR_EINT8_23_OFT 5
#define ISR_NOTUSED6_OFT 6
#define ISR_BAT_FLT_OFT 7
#define ISR_TICK_OFT 8
#define ISR_WDT_OFT 9
#define ISR_TIMER0_OFT 10
#define ISR_TIMER1_OFT 11
#define ISR_TIMER2_OFT 12
#define ISR_TIMER3_OFT 13
#define ISR_TIMER4_OFT 14
#define ISR_UART2_OFT 15
#define ISR_LCD_OFT 16
#define ISR_DMA0_OFT 17
#define ISR_DMA1_OFT 18
#define ISR_DMA2_OFT 19
#define ISR_DMA3_OFT 20
#define ISR_SDI_OFT 21
#define ISR_SPI0_OFT 22
#define ISR_UART1_OFT 23
#define ISR_NOTUSED24_OFT 24
#define ISR_USBD_OFT 25
#define ISR_USBH_OFT 26
#define ISR_IIC_OFT 27
#define ISR_UART0_OFT 28
#define ISR_SPI1_OFT 29
#define ISR_RTC_OFT 30
#define ISR_ADC_OFT 31
3.将197行的
#define BIT_WDT(0x1<<9)
改为
#define BIT_WDT_AC97(0x1<<9)
4.删除221行的宏定义
#define ClearPending(bit) {\
rSRCPND = bit;\
rINTPND = bit;\
rINTPND;\
}
十三、修改 u-boot-1.1.6/include/s3c24x0.h
1.在128行后且在结构体 S3C24X0_CLOCK_POWER 以内增加
S3C24X0_REG32 CAMDIVN; /* for s3c2440, by www.100ask.net */
2.在167行增加
/* NAND FLASH (see S3C2440 manual chapter 6, www.100ask.net) */
typedef struct {
S3C24X0_REG32 NFCONF;
S3C24X0_REG32 NFCONT;
S3C24X0_REG32 NFCMD;
S3C24X0_REG32 NFADDR;
S3C24X0_REG32 NFDATA;
S3C24X0_REG32 NFMECCD0;
S3C24X0_REG32 NFMECCD1;
S3C24X0_REG32 NFSECCD;
S3C24X0_REG32 NFSTAT;
S3C24X0_REG32 NFESTAT0;
S3C24X0_REG32 NFESTAT1;
S3C24X0_REG32 NFMECC0;
S3C24X0_REG32 NFMECC1;
S3C24X0_REG32 NFSECC;
S3C24X0_REG32 NFSBLK;
S3C24X0_REG32 NFEBLK;
} /*__attribute__((__packed__))*/ S3C2440_NAND;
3.在474行后，S3C24X0_GPIO 结构体内增加
/* s3c2440 */
S3C24X0_REG32 res9[4];
S3C24X0_REG32 GPJCON;
S3C24X0_REG32 GPJDAT;
S3C24X0_REG32 GPJUP;
4.在结尾处增加两行
#endif
#define rGSTATUS1 (*(volatile unsigned *)0x560000B0)
#define isS3C2410 ((rGSTATUS1 & 0xffff0000) == 0x32410000)
#endif /*__S3C24X0_H__*/
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