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要修改的文件 makefilecpu/arm920t/ include/configs driver/ board/ 修改代码1.顶层Makefile smdk2410_config:unconfig$(MKCONFIG) $(:_config=) arm arm920t smdk2410 NULL s3c24x0mini2440_config:unconfig$(MKCONFIG) $(:_config=) arm arm920t mini2440 NULL s3c24x02.Cpu/arm920t/start.s2-1.修改编译条件使其支持s3c2440136行#if defined(CONFIG_S3C2400) | defined(CONFIG_S3C2410) | defined(CONFIG_S3C2440)2-2.添加寄存器定义149行#define CLK_CTL_BASE 0x4C000000#define MDIV_405 0x7f 12#define PSDIV_405 0x21#define UPLL_MDIV_48 0x38 12#define UPLL_PSDIV_48 0x22#define MDIV_200 0xa1 12#define PSDIV_200 0x31 2-3. 修改中断禁止部分，添加s3c2440中断禁止代码164行#if defined(CONFIG_S3C2440) ldr r1, =0x7fff /*根据2440芯片手册，INTSUBMSK有15位可用*/ ldr r0, =INTSUBMSK str r1, r0#endif 2-4 修改时钟设置（将s3c2440主频设置为405MHZ）# if defined(CONFIG_S3C2440) /* FCLK:HCLK:PCLK = 1:4:8 */ ldr r0, =CLKDIVN mov r1, #5 str r1, r0 mrc p15, 0, r1, c1, c0, 0 /*read ctrl register hugerat*/ orr r1, r1, #0xc0000000 /*Asynchronous hugerat*/ mcr p15, 0, r1, c1, c0, 0 /*write ctrl register hugerat*/ /*now, CPU clock is 405.00 Mhz hugerat*/ mov r1, #CLK_CTL_BASE /* hugerat*/ mov r2, #UPLL_MDIV_48 /*UPLL */ add r2, r2, #UPLL_PSDIV_48 str r2, r1, #0x08 /*write UPLL first,48MHz */ mov r2, #MDIV_405 /* mpll_405mhz hugerat*/ add r2, r2, #PSDIV_405 /* mpll_405mhz hugerat*/ str r2, r1, #0x04 /* MPLLCON hugerat */#else /* FCLK:HCLK:PCLK = 1:2:4 */ ldr r0, =CLKDIVN mov r1, #3 str r1, r0 mrc p15, 0, r1, c1, c0, 0 /*read ctrl register hugerat*/ orr r1, r1, #0xc0000000 /*Asynchronous hugerat*/ mcr p15, 0, r1, c1, c0, 0 /*write ctrl register hugerat*/ /*now, CPU clock is 202.8 Mhz hugerat*/ mov r1, #CLK_CTL_BASE /* hugerat*/ mov r2, #MDIV_200 /* mpll_200mhz hugerat*/ add r2, r2, #PSDIV_200 /* mpll_200mhz hugerat*/ str r2, r1, #0x04 # endif3. 修改cpu/arm920t/s3c24x0/interrupts.c 3-1在S3C2410宏定义开关里加入对S3C2440的支持33行#if defined(CONFIG_S3C2400) | defined (CONFIG_S3C2410)| defined (CONFIG_S3C2440) | defined (CONFIG_TRAB)3-2在函数get_tbclk中，添加对mini2440支持180行defined(CONFIG_SMDK2410) | defined(CONFIG_MINI2440) | 4 修改cpu/arm920t/s3c24x0/speed.c 4-1在宏定义中添加对S3C2440的支持33行#if defined(CONFIG_S3C2400) | defined (CONFIG_S3C2410)| defined (CONFIG_S3C2440) | defined (CONFIG_TRAB)37行#elif defined(CONFIG_S3C2410) | defined(CONFIG_S3C2440 4-2修改函数get_PLLCLK由于S3c2410与s3c2440的MPLL，UPLL计算公式不同68行#if defined(CONFIG_S3C2440) if (pllreg = MPLL) return(CONFIG_SYS_CLK_FREQ * m * 2) / (p CLKDIVN & 0x2) ? get_FCLK()/2 : get_FCLK();添加#if defined(CONFIG_S3C2440) if (clk_power-CLKDIVN & 0x6) if (clk_power-CLKDIVN & 0x6)=2) return(get_FCLK()/2); if (clk_power-CLKDIVN & 0x6)=6) return(clk_power-CAMDIVN & 0x100) ? get_FCLK()/6 : get_FCLK()/3); if (clk_power-CLKDIVN & 0x6)=4) return(clk_power-CAMDIVN & 0x200) ? get_FCLK()/8 : get_FCLK()/4); return(get_FCLK(); else return(get_FCLK();#else return(clk_power-CLKDIVN & 0x2) ? get_FCLK()/2 : get_FCLK();#endif5。修改include/asm-arm/mach-types.h 添加mini机器ID,要求添加的ID 与内核提供的ID保持一致。在内核源代码文件arch/arm/tools/mach-types.hinclude/asm-arm/mach-types.h查到后，添加如：#define MACH_TYPE_S3C2440 3626. 修改cpu/arm920t/s3c24x0/serial.c在有s3c2410宏定义开关里加入对s3c2440的支持22行#if defined(CONFIG_S3C2400) | defined (CONFIG_S3C2410) | defined (CONFIG_S3C2440) | defined (CONFIG_TRAB)27行#elif defined(CONFIG_S3C2410) | defined(CONFIG_S3C2440)7. 修改drivers/rtc/s3c24x0_rtc.c 在有s3c2410宏定义开关里加入对s3c2440的支持 35行#elif defined(CONFIG_S3C2410) | defined(CONFIG_S3C2440)8修改include/s3c24x0.h在有s3c2410宏定义开关里加入对s3c2440的支持85行#if defined(CONFIG_S3C2410) | defined(CONFIG_S3C2440)97，102行97 #if defined(CONFIG_S3C2410) | defined(CONFIG_S3C2440)S3C24X0_REG32DISRCC;#endifS3C24X0_REG32DIDST;/* modified by david, for 2440 */102 #if defined(CONFIG_S3C2410) | defined(CONFIG_S3C2440)S3C24X0_REG32DIDSTC;#endifS3C24X0_REG32DCON;S3C24X0_REG32DSTAT;110行#if defined(CONFIG_S3C2410) | defined(CONFIG_S3C2440)128行S3C24X0_REG32CLKDIVN;/* add by david, for 2440 */#if defined (CONFIG_S3C2440)S3C24X0_REG32 CAMDIVN;#endif148行#if defined(CONFIG_S3C2410) | defined(CONFIG_S3C2440)S3C24X0_REG32LCDINTPND;404行#if defined(CONFIG_S3C2410) | defined(CONFIG_S3C2440)S3C24X0_REG32GPACON;9. 在board目录中创建一个属于新开发板的目录，向目录中添加文件，并修改：mkdir p board/mini2440cp rf board/smdk2410/* board/mini2440改smdk2410.cmv smdk2410.c min2440.c改Makefile28行COBJS:= mini2440.o flash.o10修改board/mini2440/ mini2440.c 10-1 修改PLL 的配置#if defined(CONFIG_S3C2410)/* Fout = 202.8MHz */#define M_MDIV 0xA1#define M_PDIV 0x3#define M_SDIV 0x1#endif#if defined(CONFIG_S3C2440)/* Fout = 405MHz */#define M_MDIV 0x7f #define M_PDIV 0x2#define M_SDIV 0x1#endif 10-2修改UPLL#elif USB_CLOCK=1/* modified by david, for 2440 */#if defined(CONFIG_S3C2410)#define U_M_MDIV 0x48#define U_M_PDIV 0x3#endif#if defined(CONFIG_S3C2440)#define U_M_MDIV 0x38#define U_M_PDIV 0x2#endif#define U_M_SDIV0x2#endif 10-3 为了引导内核，修改函数board_init中开发板类型代码部分106行gd-bd-bi_arch_number = MACH_TYPE_MINI2440;/机器码名字11 修改board/mini2440/lowlevel_init.S 修改REFRESH的刷新周期#define Trp0x0/* 2clk */#define Trc0x3/* 7clk */#define Tchr0x2/* 3clk */#define REFCNT1113/* period=15.6us, HCLK=60Mhz, (2048+1-15.6*60) */改后#define Trp 0x2 /* 4clk */ /* modified by david, for 2440*/#define Trc0x3/* 7clk */#define Tchr0x2/* 3clk */#define REFCNT 1012 /* modified by david, for 2440*/12软件硬配置文件mini2440.hcp include/configs/smdk2410.h include/configs/mini2440.h13.修改include/configs/mini2440.h 13-1 添加对s3c2440宏定义37，38行#defineCONFIG_S3C