移植uboot201609到qq2440

从ftp://ftp.denx.de/pub/u-boot/下载源码u-boot-2016.09.tar.bz2

复制文件

 cp configs/smdk2410_defconfig   configs/smdk2440_defconfig

cp include/configs/smdk2410.h  include/configs/smdk2440.h

cp -r board/samsung/smdk2410/  board/samsung/smdk2440

mv board/samsung/smdk2440/smdk2410.c   board/samsung/smdk2440/smdk2440.c

修改board/samsung/smdk2440/Makefile文件内容

obj-y   := smdk2410.o

obj-y   := smdk2440.o

修改configs/smdk2440_defconfig

CONFIG_TARGET_SMDK2440=y

CONFIG_SYS_PROMPT="SMDK2440 # "

修改board/samsung/smdk2440/Kconfig文件内容

if TARGET_SMDK2440
config SYS_BOARD
        default "smdk2440"
config SYS_VENDOR
        default "samsung"
config SYS_SOC
        default "s3c24x0"
config SYS_CONFIG_NAME
        default "smdk2440"
endif

修改文件vim arch/arm/Kconfig

添加config TARGET_SMDK2440
        bool "Support smdk2440"
        select CPU_ARM920T

source "board/samsung/smdk2440/Kconfig"

修改文件vim arch/arm/include/asm/mach-types.h 

#define MACH_TYPE_SMDK2440             198

#ifdef CONFIG_ARCH_SMDK2440
# ifdef machine_arch_type
#  undef machine_arch_type
#  define machine_arch_type     __machine_arch_type
# else
#  define machine_arch_type     MACH_TYPE_SMDK2440
# endif
# define machine_is_smdk2440()  (machine_arch_type == MACH_TYPE_SMDK2440)
#else
# define machine_is_smdk2440()  (0)
#endif

修改Makefile文件

添加

ARCH=arm

CROSS_COMPILE ?= arm-linux-

1. 设置PLL的时钟的函数在_main中的board_init_f中初始化函数列表中的  boad_early_init_f 中，设置MPLL倍频值。它应该要在设置分频系数和初始化内存控制器之前来设置。

             smdk2410.c可以注释掉:　　

  　　　 /* to reduce PLL lock time, adjust the LOCKTIME register */    　　   //writel(0xFFFFFF, &clk_power->locktime);　　    /* configure MPLL */  　　     //writel((M_MDIV << 12) + (M_PDIV << 4) + M_SDIV,           //     &clk_power->mpllcon);

　　　　在start.S中再设置：

  #if 0    /* FCLK:HCLK:PCLK = 1:2:4 */    /* default FCLK is 120 MHz ! */    ldr    r0, =CLKDIVN    mov    r1, #3    str    r1, [r0]  #else        /* 2. 设置时钟 400MHz */        ldr r0, =0x4c000014        //  mov r1, #0x03;            // FCLK:HCLK:PCLK=1:2:4, HDIVN=1,PDIVN=1        mov r1, #0x05;            // FCLK:HCLK:PCLK=1:4:8        str r1, [r0]        /* 如果HDIVN非0，CPU的总线模式应该从“fast bus mode”变为“asynchronous bus mode” */        mrc p15, 0, r1, c1, c0, 0       /* 读出控制寄存器 */        orr r1, r1, #0xc0000000         /* 设置为“asynchronous bus mode” */        mcr p15, 0, r1, c1, c0, 0       /* 写入控制寄存器 */            #define S3C2440_MPLL_400MHZ     ((0x5c<<12)|(0x01<<4)|(0x01))        /* MPLLCON = S3C2440_MPLL_200MHZ */        ldr r0, =0x4c000004        ldr r1, =S3C2440_MPLL_400MHZ        str r1, [r0]          /* 启动ICACHE */        mrc p15, 0, r0, c1, c0, 0   @ read control reg        orr r0, r0, #(1<<12)        mcr p15, 0, r0, c1, c0, 0   @ write it back  #endif

 

　 2.内存控制器的设置值改为如下：/board/samsung/smdk2410/lowlevel_init.S 

SMRDATA:#if 0    .word (0+(B1_BWSCON<<4)+(B2_BWSCON<<8)+(B3_BWSCON<<12)+(B4_BWSCON<<16)+(B5_BWSCON<<20)+(B6_BWSCON<<24)+(B7_BWSCON<<28))    .word ((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC))    .word ((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC))    .word ((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC))    .word ((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC))    .word ((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC))    .word ((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC))    .word ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN))    .word ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN))    .word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)    .word 0x32    .word 0x30    .word 0x30#else  .long 0x22011110     //BWSCON  .long 0x00000700     //BANKCON0  .long 0x00000700     //BANKCON1  .long 0x00000700     //BANKCON2  .long 0x00000700     //BANKCON3  .long 0x00000700     //BANKCON4  .long 0x00000700     //BANKCON5  .long 0x00018005     //BANKCON6  .long 0x00018005     //BANKCON7  .long 0x008C04F4     //REFRESH  .long 0x000000B1     //BANKSIZE  .long 0x00000030     //MRSRB6  .long 0x00000030     //MRSRB7 #endif