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u-boot在s3c2410開發板上移植過程
1）u-boot版本1.1.3，gcc version 3.3.3 (DENX ELDK 3.1.1 3.3.3-9)2）在Makefile中加入bks2410_config : unconfig @./mkconfig $(@:_config=) arm arm920t bks2410 NULL s3c24x0我把我的板子起名叫bks2410，可以依自己的喜好修改3）建立board/bks2410目錄，拷貝board/smdk2410下的文件到board/bks2410目錄，將smdk2410.c更名為bks2410.c4）cp include/configs/smdk2410.h include/configs/bks2410.h5）將arm-linux-gcc的目錄加入到PATH環境變量中，我的是目錄/opt/eldk/usr/bin:/opt/eldk/bin6）測試編譯能否成功：make bks2410_configmake all ARCH=arm生成u-boot.bin就OK了7）依照你自己開發板的內存地址分配情況修改board/bks2410/memsetup.S文件，我的程序：#include <config.h>#include <version.h>#define BWSCON 0x48000000/* BWSCON */#define DW8 (0x0)#define DW16 (0x1)#define DW32 (0x2)#define WAIT (0x1<<2)#define UBLB (0x1<<3)#define B1_BWSCON (DW32)#define B2_BWSCON (DW16)#define B3_BWSCON (DW16 + WAIT + UBLB)#define B4_BWSCON (DW16)#define B5_BWSCON (DW16)#define B6_BWSCON (DW32)#define B7_BWSCON (DW32)/* BANK0CON */#if 0#define B0_Tacs 0x0 /* 0clk */#define B0_Tcos 0x0 /* 0clk */#define B0_Tacc 0x7 /* 14clk */#define B0_Tcoh 0x0 /* 0clk */#define B0_Tah 0x0 /* 0clk */#define B0_Tacp 0x0#define B0_PMC 0x0 /* normal */#endif#define B0_Tacs 0x3 /* 0clk */#define B0_Tcos 0x3 /* 0clk */#define B0_Tacc 0x7 /* 14clk */#define B0_Tcoh 0x3 /* 0clk */#define B0_Tah 0x3 /* 0clk */#define B0_Tacp 0x1#define B0_PMC 0x0 /* normal *//* BANK1CON */#if 0#define B1_Tacs 0x0 /* 0clk */#define B1_Tcos 0x0 /* 0clk */#define B1_Tacc 0x7 /* 14clk */#define B1_Tcoh 0x0 /* 0clk */#define B1_Tah 0x0 /* 0clk */#define B1_Tacp 0x0#define B1_PMC 0x0#endif#define B1_Tacs 0x3 /* 0clk */#define B1_Tcos 0x3 /* 0clk */#define B1_Tacc 0x7 /* 14clk */#define B1_Tcoh 0x3 /* 0clk */#define B1_Tah 0x3 /* 0clk */#define B1_Tacp 0x3#define B1_PMC 0x0#define B2_Tacs 0x0#define B2_Tcos 0x0#define B2_Tacc 0x7#define B2_Tcoh 0x0#define B2_Tah 0x0#define B2_Tacp 0x0#define B2_PMC 0x0#if 0#define B3_Tacs 0x0 /* 0clk */#define B3_Tcos 0x3 /* 4clk */#define B3_Tacc 0x7 /* 14clk */#define B3_Tcoh 0x1 /* 1clk */#define B3_Tah 0x0 /* 0clk */#define B3_Tacp 0x3 /* 6clk */#define B3_PMC 0x0 /* normal */#endif#define B3_Tacs 0x0 /* 0clk */#define B3_Tcos 0x0 /* 4clk */#define B3_Tacc 0x7 /* 14clk */#define B3_Tcoh 0x0 /* 1clk */#define B3_Tah 0x0 /* 0clk */#define B3_Tacp 0x0 /* 6clk */#define B3_PMC 0x0 /* normal */#define B4_Tacs 0x0 /* 0clk */#define B4_Tcos 0x0 /* 0clk */#define B4_Tacc 0x7 /* 14clk */#define B4_Tcoh 0x0 /* 0clk */#define B4_Tah 0x0 /* 0clk */#define B4_Tacp 0x0#define B4_PMC 0x0 /* normal */#define B5_Tacs 0x0 /* 0clk */#define B5_Tcos 0x0 /* 0clk */#define B5_Tacc 0x7 /* 14clk */#define B5_Tcoh 0x0 /* 0clk */#define B5_Tah 0x0 /* 0clk */#define B5_Tacp 0x0#define B5_PMC 0x0 /* normal */#define B6_MT 0x3 /* SDRAM */#define B6_Trcd 0x1#define B6_SCAN 0x1 /* 9bit */#define B7_MT 0x3 /* SDRAM */#define B7_Trcd 0x1 /* 3clk */#define B7_SCAN 0x1 /* 9bit *//* REFRESH parameter */#define REFEN 0x1 /* Refresh enable */#define TREFMD 0x0 /* CBR(CAS before RAS)/Auto refresh */#define Trp 0x0 /* 2clk */#define Trc 0x3 /* 7clk */#define Tchr 0x2 /* 3clk */#define REFCNT 1113 /* period=15.6us, HCLK=60Mhz, (2048+1-15.6*60) *//**************************************/_TEXT_BASE: .word TEXT_BASE.globl memsetupmemsetup: /* memory control configuration */ /* make r0 relative the current location so that it */ /* reads SMRDATA out of FLASH rather than memory ! */ adr r0, SMRDATA /*ldr r1, _TEXT_BASE*/ /*sub r0, r0, r1*/ ldr r1, =BWSCON /* Bus Width Status Controller */ add r2, r0, #13*40: ldr r3, [r0], #4 str r3, [r1], #4 cmp r2, r0 bne 0b /* everything is fine now */ mov pc, lr .ltorg/* the literal pools origin */SMRDATA: .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 0x1f7c/*((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 0x31 .word 0x30 .word 0x30 8）在board/bks2410加入NAND Flash讀函數，建立nand_read.c，加入如下內容(copy from vivi)：#include <config.h>#define __REGb(x) (*(volatile unsigned char *)(x))#define __REGi(x) (*(volatile unsigned int *)(x))#define NF_BASE 0x4e000000#define NFCONF __REGi(NF_BASE + 0x0)#define NFCMD __REGb(NF_BASE + 0x4)#define NFADDR __REGb(NF_BASE + 0x8)#define NFDATA __REGb(NF_BASE + 0xc)#define NFSTAT __REGb(NF_BASE + 0x10)#define BUSY 1inline void wait_idle(void) { int i; while(!(NFSTAT & BUSY)) for(i=0; i<10; i++);}#define NAND_SECTOR_SIZE 512#define NAND_BLOCK_MASK (NAND_SECTOR_SIZE - 1)/* low level nand read function */intnand_read_ll(unsigned char *buf, unsigned long start_addr, int size){ int i, j; if ((start_addr & NAND_BLOCK_MASK) || (size & NAND_BLOCK_MASK)) { return -1; /* invalid alignment */ } /* chip Enable */ NFCONF &= ~0x800; for(i=0; i<10; i++); for(i=start_addr; i < (start_addr + size);) { /* READ0 */ NFCMD = 0; /* Write Address */ NFADDR = i & 0xff; NFADDR = (i >> 9) & 0xff; NFADDR = (i >> 17) & 0xff; NFADDR = (i >> 25) & 0xff; wait_idle(); for(j=0; j < NAND_SECTOR_SIZE; j++, i++) { *buf = (NFDATA & 0xff); buf++; } } /* chip Disable */ NFCONF |= 0x800; /* chip disable */ return 0;}9）修改board/bks2410/Makefile為OBJS := bks2410.o flash.o nand_read.o10）修改cpu/arm920t/start.S文件在ldr pc, _start_armboot之前加入：#ifdef CONFIG_S3C2410_NAND_BOOT bl copy_myself @ jump to ram ldr r1, =on_the_ram add pc, r1, #0 nop nop 1: b 1b @ infinite loop on_the_ram:#endif在_start_armboot: .word start_armboot之後加入：#ifdef CONFIG_S3C2410_NAND_BOOTcopy_myself: mov r10, lr@ reset NAND mov r1, #NAND_CTL_BASE ldr r2, =0xf830 @ initial value str r2, [r1, #oNFCONF] ldr r2, [r1, #oNFCONF] bic r2, r2, #0x800 @ enable chip str r2, [r1, #oNFCONF] mov r2, #0xff @ RESET command strb r2, [r1, #oNFCMD] mov r3, #0 @ wait1:add r3, r3, #0x1 cmp r3, #0xa blt 1b2:ldr r2, [r1, #oNFSTAT] @ wait ready tst r2, #0x1 beq 2b ldr r2, [r1, #oNFCONF] orr r2, r2, #0x800 @ disable chip str r2, [r1, #oNFCONF]@ get read to call C functions (for nand_read()) ldr sp, DW_STACK_START @ setup stack pointer mov fp, #0 @ no previous frame, so fp=0@ copy vivi to RAM ldr r0, =UBOOT_RAM_BASE mov r1, #0x0 mov r2, #0x20000 bl nand_read_ll tst r0, #0x0 beq ok_nand_read#ifdef CONFIG_DEBUG_LL bad_nand_read: ldr r0, STR_FAIL ldr r1, SerBase bl PrintWord1:b 1b @ infinite loop #endifok_nand_read:#ifdef CONFIG_DEBUG_LL ldr r0, STR_OK ldr r1, SerBase bl PrintWord#endif@ verify mov r0, #0 ldr r1, =UBOOT_RAM_BASE mov r2, #0x400 @ 4 bytes * 1024 = 4K-bytesgo_next: ldr r3, [r0], #4 ldr r4, [r1], #4 teq r3, r4 bne notmatch subs r2, r2, #4 beq done_nand_read bne go_nextnotmatch:#ifdef CONFIG_DEBUG_LL sub r0, r0, #4 ldr r1, SerBase bl PrintHexWord ldr r0, STR_FAIL ldr r1, SerBase bl PrintWord#endif1:b 1bdone_nand_read:#ifdef CONFIG_DEBUG_LL ldr r0, STR_OK ldr r1, SerBase bl PrintWord#endif mov pc, r10@ clear memory@ r0: start address@ r1: length mem_clear: mov r2, #0 mov r3, r2 mov r4, r2 mov r5, r2 mov r6, r2 mov r7, r2 mov r8, r2 mov r9, r2clear_loop: stmia r0!, {r2-r9} subs r1, r1, #(8 * 4) bne clear_loop mov pc, lr#endif @ CONFIG_S3C2410_NAND_BOOT在文件的最後加入： .align 2DW_STACK_START: .word STACK_BASE+STACK_SIZE-411）修改include/configs/bks2410.h文件，添加如下內容：/* * Nandflash Boot */#define CONFIG_S3C2410_NAND_BOOT 1#define STACK_BASE 0x33f00000#define STACK_SIZE 0x8000#define UBOOT_RAM_BASE 0x33f80000/* NAND Flash Controller */#define NAND_CTL_BASE 0x4E000000#define bINT_CTL(Nb) __REG(INT_CTL_BASE + (Nb))/* Offset */#define oNFCONF 0x00#define oNFCMD 0x04#define oNFADDR 0x08#define oNFDATA 0x0c#define oNFSTAT 0x10#define oNFECC 0x1412）重新編譯u-bootmake all ARCH=arm13）通過jtag將u-boot燒寫到flash中就可以從NAND flash啟動了我的u-boot啟動信息：U-Boot 1.1.3 (May 6 2006 - 18:13:59)U-Boot code: 33F80000 -> 33F967C4 BSS: -> 33F9AAACRAM Configuration:Bank #0: 30000000 64 MBFlash: 512 kB*** Warning - bad CRC, using default environmentIn: serialOut: serialErr: serialBKS2410 #
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