嵌入式培训-课件及uboot instruction

1）u-boot1.1.3，gccversion3.3.3(DENXELDK3.1.13.3.3-在Makefile中加bks2410_config:@./mkconfig$(@:_config=)armarm920tbks2410NULL我把我的板子起名叫bks2410，可以依自己的喜好修建立 ，拷贝board/smdk2410下的文件到 ，smdk2410.c更名为cpinclude/configs/smdk2410.h测试编译能否成功makebks2410_configmakeallARCH=arm生成u-boot.bin就OK依照你自己开发板的内存地址分配情况修改文件，修改SMRDATA中各个参数的值（VIVI的值）.word(0+(B1_BWSCON<<4)+(B2_BWSCON<<8)+(B3_BWSCON<<12)+.word.word.word.word0x1f7c/*((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tc.word.word.word.word.word((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<< .word.word.word在board/bks2410加入NANDFlash读函数，建立nand_read.c，VIVI中相应文件一样。修改cpu/arm920t/start.S文在ldrpc,_start_armboot之前加入#ifdef @jumpto r1,=on_the_ramaddpc,r1,#0 @infinite在_start_armbootwordstart_armboot之后加入#ifdefmovr10,lr@resetNANDmovr1, r2,=0xf830 @initialvalue r2,[r1,#oNFCONF] r2,[r1,bicr2,r2, @enable r2,[r1,movr2,#0xff @RESETcommandstrbr2,[r1,#oNFCMD]movr3, @1:addr3,r3,#0x1cmpr3,#0xa r2,[r1,#oNFSTAT] @waitready r2,#0x1beq r2,[r1,orrr2,r2,#0x800 @disablechip r2,[r1,#oNFCONF]@getreadtocallCfunctions(for sp,DW_STACK_START @setupstackpointermovfp,#0 @nopreviousframe,sofp=0@copyvivito r0, r1,#0x0movr2,#0x20000 r0,#0x0beq#ifdefCONFIG_DEBUG_LL r0,STR_FAIL r1,SerBase @infiniteloop#ifdefCONFIG_DEBUG_LL r0,STR_OK r1,SerBase @verifymovr0,#0 r1,movr2,#0x400 @4bytes*1024=4K-bytes r3,[r0], r4,[r1],#4 r3,r4bnenotmatchsubsr2,r2,#4beqdone_nand_readbnego_next#ifdefCONFIG_DEBUG_LLsubr0,r0,#4 r1,SerBase r0,STR_FAIL r1,SerBase #ifdefCONFIG_DEBUG_LL r0,STR_OK r1,SerBase movpc,@clear@r0:startaddress@r1:lengthmovr2,movr3,r2movr4,r2movr5,r2movr6,r2movr7,r2movr8,r2movr9,stmiar0!,{r2-r9}subsr1,r1,#(8*4)bneclear_loopmovpc,#endif@在文件的最后加入 STACK_BASE+STACK_SIZE-修改include/configs/bks2410.h文件，添加如下内容*Nandflash#defineCONFIG_S3C2410_NAND_BOOT#defineSTACK_BASE #defineSTACK_SIZE #define /*NANDFlashController#define #define/*Offset

REG(INT_CTL_BASE+#define #define #define #define #define #define 重新编译u-bootmakeallARCH=arm通过jtag将u-boot烧写到flash中就可以从NANDflashu-boot启动信息如下U-Boot1.1.3(May62006-U-Boot