nand.c

这是飞凌TE2410开发板的Bootloader源程序。

	rINTMSK=BIT_ALLMSK;
	
	cache_clean_invalidate();
	tlb_invalidate();	

	__asm{
//		mov	r0, a0//%0
//		mov	r1, a1//%1
//		mov	r2, a2//%2
		mov	ip, #0
		mcr	p15, 0, ip, c13, c0, 0	/* zero PID */
		mcr	p15, 0, ip, c7, c7, 0	/* invalidate I,D caches */
		mcr	p15, 0, ip, c7, c10, 4	/* drain write buffer */
		mcr	p15, 0, ip, c8, c7, 0	/* invalidate I,D TLBs */
		mrc	p15, 0, ip, c1, c0, 0	/* get control register */
		bic	ip, ip, #0x0001			/* disable MMU */
		mcr	p15, 0, ip, c1, c0, 0	/* write control register */
		//mov	pc, r2
		//nop
		//nop
		/* no outpus */
		//: "r" (a0), "r" (a1), "r" (a2)
	}
//	SetClockDivider(1, 1);
//	SetSysFclk(FCLK_200M);		//start kernel, use 200M
	//SET_IF();
	goto_start = (void (*)(U32, U32))a2;
	(*goto_start)(a0, a1);	
}

extern int sprintf(char * /*s*/, const char * /*format*/, ...);

static void LoadRun(void)
{
	U32 i, ram_addr, buf = boot_params.run_addr.val;
	struct param_struct *params = (struct param_struct *)0x30000100;
	int size;
	
	memset(params, 0, sizeof(struct param_struct));
	/*{
		U32 *pD = (U32 *)0x30000100;
		
		for(i=0; i<0x1000; i++)
			pD[i] = 0;
	}*/
	if(boot_params.start.val) {
		char parameters[512];
		char *rootfs;
		char initrd[32];
		char *tty_sel;
		char *devfs_sel;
		char *display_sel;
		
		switch (boot_params.root_sel.val) {
		case 0:
			rootfs = "/dev/ram";
			break;
		case 1:
			rootfs = "nfs";
			break;
		case 2:
			rootfs = "/dev/mtdblock2"; //    by pht.
			break;
		case 3:
			rootfs = "/dev/mtdblock3";
			break;
		case 4:
			rootfs = "/dev/mtdblock4";
			break;
		default:
			rootfs="";	//user define
			break;
		}
		
		switch (boot_params.display_sel.val) {
		case 0:
			display_sel = "display=sam320";
			break;
		case 1:
			display_sel = "display=vga640";
			break;
		case 2:
			display_sel	= "display=tv640";
			break;			
		default:
			display_sel = "display=vga640";	
			break;
		}
	
	
	
	
	
		if(boot_params.root_sel.val)
			sprintf(initrd, "load_ramdisk=0");
		else
			sprintf(initrd, "initrd=0x%08x,0x%08x",
						boot_params.initrd_addr.val,
						boot_params.initrd_len.val);
	
		switch (boot_params.tty_sel.val) {
		case 0:
			tty_sel="ttySAC0";
			break;
		case 1:
			tty_sel="ttySAC1";
			break;
		case 2:
			tty_sel="ttyS0";
			break;
		case 3:
			tty_sel="ttyS1";
			break;
		default:
			tty_sel="ttySAC0";	//user define
			break;
		}
	

		devfs_sel = "devfs=mount";

		
		memset(parameters, 0, sizeof(parameters));
		sprintf(parameters,
					"root=%s init=/linuxrc %s console=%s,%d mem=%dK %s %s %s",
					rootfs,
					initrd,
					tty_sel,
					boot_params.serial_baud.val,
					boot_params.mem_cfg.val>>10,
					devfs_sel,
					display_sel,
					boot_params.string);
		
		params->u1.s.page_size = LINUX_PAGE_SIZE;
		params->u1.s.nr_pages = (boot_params.mem_cfg.val >> LINUX_PAGE_SHIFT);
		memcpy(params->commandline, parameters, strlen(parameters));
	
		printf("Set boot params = %s\n", params->commandline);
	}

	printf("Load Kernel...\n");	
/*
	if(boot_params.osstor.val)	//load program from NOR or NAND FLASH
		memcpy((void *)buf, (void *)(0x04000000+0x00020000), 0x001e0000);
	else {
*/
		StartPage = NandPart[2].offset>>9;
		size = NandPart[2].size;
		ram_addr = buf;	
	
		for(i=0; size>0; ) {
			if(!(i&0x1f)) {
				if(CheckBadBlk(i+StartPage)) {
					printf("Skipped bad block at 0x%x\n", i+StartPage);
					i += 32;
					size -= 32<<9;
					continue;
				}
			}
			ReadPage((i+StartPage), (U8 *)ram_addr);
			i++;
			size -= 512;
			ram_addr += 512;
		}
//	}
	
	if(!boot_params.root_sel.val) {
		int ramdisk_sz;
		
		printf("Load Ramdisk...\n");
		
		StartPage = NandPart[3].offset>>9;
		size = NandPart[3].size;
		
		ram_addr = boot_params.initrd_addr.val;
		ramdisk_sz = boot_params.initrd_len.val;
		
		for(i=0; size>0&&ramdisk_sz>0; ) {
			if(!(i&0x1f)) {
				if(CheckBadBlk(i+StartPage)) {
					printf("Skipped bad block at 0x%x\n", i+StartPage);
					i += 32;
					size -= 32<<9;
					continue;
				}
			}
			ReadPage((i+StartPage), (U8 *)ram_addr);
			i++;
			size -= 512;
			ram_addr += 512;
			ramdisk_sz -= 512;
		}
	}
	
	DsNandFlash();

		//ChangeClockDivider(13,12);
		//ChangeMPllValue(67,1,1);	//300MHz,2440A!
		//rCLKCON = 0x7fff0;
	call_linux(0, boot_params.machine.val, buf);
}

/************************************************************/
static int have_nandflash;
static void InitNandFlash(int info)
{	
	U32 i;
	
	InitNandCfg();
	i = ReadChipId();
	if(info)
		;//printf("Read chip id = %x\n", i);	
	if((i==0x9873)||(i==0xec75))	
		NandAddr = 0;
	else if(i==0xec76)
		NandAddr = 1;
	else {
		if(info)	
			puts("Chip id error!!!\n");
		have_nandflash = 0;
		return;
	}
	have_nandflash = 1;
	if(info)
		;//printf("Nand flash status = %x\n", ReadStatus());
}

void NandErase(void)
{
	int i, err = 0;
	
	InitNandFlash(1);
	if(!have_nandflash)
		return;
	
	i = NandSelPart("erase");
	if(i<0)
		return;	
	
	printf("Are you sure to erase nand flash from page 0x%x, block count 0x%x ? [y/n]\n", StartPage, BlockCnt);
	while(1) {
		char c;
		
		c = getch();
		if((c=='y')||(c=='Y'))
			break;
		if((c=='n')||(c=='N'))
			return;
	}	
	
	for(i=0; BlockCnt; BlockCnt--, i+=32) {
		if(EraseBlock(i+StartPage)) {
			err ++;
			add_bpage(i+StartPage);
			puts("Press any key to continue...\n");
			getch();
		}
	}	

	DsNandFlash();		//disable nand flash interface
	puts("Erase Nand partition completed ");
	
	if(err)
	{
		save_params();
		cpy_bpage();
		printf("with %d bad block(s)\n", err);
	}
	else
		puts("success\n");
}

void NandWrite(void)
{
	InitNandFlash(1);
	if(!have_nandflash)
		return;
	WrFileToNF();
	DsNandFlash();		//disable nand flash interface
}

extern MemoryTest(void);
int RelocateNKBIN(U32 img_src, U32 *pStart, U32 *pLength, U32 *pLaunch);


static void LoadRunApp()
{
	U32 i, ram_addr, buf = boot_params.initrd_addr.val;
	int size;
	MemoryTest();
	printf("Load Application...\n");	


	StartPage = NandPart[1].offset>>9;	//part 2,3...
	size = NandPart[1].size;//NandPart[boot_params.root_sel.val].size;
	ram_addr = boot_params.AppRun_addr.val;

	for(i=0; size>0; ) {
		if(!(i&0x1f)) {
			if(CheckBadBlk(i+StartPage)) {
				printf("Skipped bad block at 0x%x\n", i+StartPage);
				i += 32;
				//size -= 32<<9;
				continue;
			}
		}
		ReadPage((i+StartPage), (U8 *)ram_addr);
		i++;
		size -= 512;
		ram_addr += 512;
	}

	
	printf("run 0x%08x...\n",boot_params.AppRun_addr.val);
	//RelocateNKBIN(buf, &buf, &i, &boot_params.run_addr.val);
	call_linux(0, 0, boot_params.AppRun_addr.val);
}


static void LoadRunWince(void)
{
	U32 i, ram_addr, buf = boot_params.initrd_addr.val;
	int size;
	MemoryTest();
	printf("Load Kernel...\n");	


	StartPage = NandPart[5].offset>>9;	//part 2,3...
	size = boot_params.initrd_len.val;//NandPart[boot_params.root_sel.val].size;
	ram_addr = buf;

	for(i=0; size>0; ) {
		if(!(i&0x1f)) {
			if(CheckBadBlk(i+StartPage)) {
				printf("Skipped bad block at 0x%x\n", i+StartPage);
				i += 32;
				//size -= 32<<9;
				continue;
			}
		}
		ReadPage((i+StartPage), (U8 *)ram_addr);
		i++;
		size -= 512;
		ram_addr += 512;
	}

	
	printf("run 0x%08x...\n", boot_params.run_addr.val);
	//RelocateNKBIN(buf, &buf, &i, &boot_params.run_addr.val);
	call_linux(0, 0, boot_params.run_addr.val);
}

void NandLoadRun(void)
{
	InitNandFlash(1);
	LoadRun();
	
}
void NandLoadRun_wince(void)
{
	InitNandFlash(1);
	LoadRunWince();
}

void NandLoadRun_App()
{
	InitNandFlash(1);
	LoadRunApp();
}

void AutoNandLoadRun()
{
	InitNandFlash(1);
	switch(boot_params.start.val){
	case 1:
		LoadRunApp();
		break;
	case 2:
		LoadRun();
		break;
	case 3:
		LoadRunWince();	
		break;
	default:
		break;
	}
		
}

#include "norflash.h"
#define	NOR_PARAMS_OFFSET	0x1c000

int search_params(void)
{
	U32 page, page_cnt;
	U8 dat[528];
	BootParams *pBP = (BootParams *)dat;
	int ret=-1;
	
	InitNandFlash(0);	//don't show info in InitNandFlash!
	if(have_nandflash) {
		page     = NandPart[0].offset>>9;
		page_cnt = NandPart[0].size>>9;
	
		//search from the last page
		while(page_cnt--) {
			ReadPage(page+page_cnt, dat);
			if(!strncmp(boot_params.start.flags, pBP->start.flags, 10)) {
				ret = 0;
				break;
			}
		}
	} else {	
		memcpy(dat, (void *)(NOR_PARAMS_OFFSET), 512);	//now mmu is not set, so use original address
		if(!strncmp(boot_params.start.flags, pBP->start.flags, 10))
			ret = 0;
	}
	
	DsNandFlash();
	
	if(!ret) {
		ParamItem *pPIS = &pBP->start, *pPID = &boot_params.start;
		
		for(; pPID<=&boot_params.user_params; pPIS++, pPID++)
			if(!strncmp(pPID->flags, pPIS->flags, sizeof(pPID->flags)))
				pPID->val = pPIS->val;
		strncpy(boot_params.string, pPIS->flags, boot_params.user_params.val+1);
		if(boot_params.user_params.val!=strlen(pPID->flags)) {
			memset(boot_params.string, 0, sizeof(boot_params.string));
			boot_params.user_params.val = 0;
		}
		memcpy(boot_params.bpage, (unsigned int*)pPIS->flags+32, 4);
		
		if(boot_params.bpage[0]>20)//第一次烧写时可能不对，所以判断一下
		{
			boot_params.bpage[0]=0;
		}			
	
		memcpy(boot_params.bpage, (unsigned int*)pPIS->flags+32, boot_params.bpage[0]*4+4);
			
		
	} else {
		//printf("Fail to find boot params! Use Default parameters.\n");
		//don't printf anything before serial initialized!
	}
	cpy_bpage();
	return ret;
}

void cpy_bpage()
{
	if(boot_params.bpage[0]>20)
	{
		boot_params.bpage[0]=0;
	}	

	memcpy((char *)BPAGE_MAGIC_ADD,bpage_magic,8);
	memcpy((unsigned int *)BPAGE_ADD,boot_params.bpage,boot_params.bpage[0]*4+4);
}
//添加坏块信息
void add_bpage(unsigned int seq)
{
		int i, j;
		//printf("----------bpage  %x-----\n",seq);
		i = 1;
		/*
		//boot_params.bpage[1]=seq;
		boot_params.bpage[1]=0x11111;
		printf("----------bpage  %x-----!!!\n",boot_params.bpage[1]);
		*/

		
		while (i < boot_params.bpage[0] && boot_params.bpage[i] < seq)
			i++;
		if (boot_params.bpage[i] == seq)
			return;
		else if (i == boot_params.bpage[0])
			boot_params.bpage[i+1] = seq;
		else
		{
			j = boot_params.bpage[0];
			while (j >= i)
			{
				boot_params.bpage[j + 1] = boot_params.bpage[j];
				j--;
			}
			
			boot_params.bpage[i] = seq;
		}
		boot_params.bpage[0]++;
}



//保存在最后两个block,应确保程序(包括出现坏块时)不会覆盖到最后两块
int save_params(void)
{
	U32 page, page_cnt;
	U8 dat[0x20000];
	int ret = 0;
	
	InitNandFlash(1);
	have_nandflash=1;
	if(have_nandflash) {
		memset(dat, 0, sizeof(boot_params));
		memcpy(dat, &boot_params, sizeof(boot_params));

		page = (NandPart[1].offset>>9)-64;
	
		for(page_cnt=0; page_cnt<64; page_cnt++) {
			if(!(page_cnt%32))
				EraseBlock(page);
			if(!WritePage(page+page_cnt, dat))
				break;
		}
		if(page_cnt>=64)
			ret = -1;
		printf("Save boot params %s.\n", ret?"fail":"success");
	} else {
		memcpy(dat, (void *)0x04000000, NOR_PARAMS_OFFSET);
		memcpy(dat+NOR_PARAMS_OFFSET, &boot_params, sizeof(boot_params));
		ProgNorFlash(0, (U32)dat, sizeof(dat));	//28F128
	}
	
	DsNandFlash();
	
	return ret;
}

int set_params(void)
{
	int i, key, chg=0;
	ParamItem *pPID;
	printf(" +------------------------------------------------------------+\n");
	printf(" |                     Config parameters                      |\n");
	printf(" +------------------------------------------------------------+\n");
	//printf("\n#####Config parameters#####\n");
	
	do {
		pPID = &boot_params.start;
		for(i=0; pPID<=&boot_params.user_params; pPID++, i++)
			printf("  [%2d] %-10s : 0x%08x (%d)\n",
						i, pPID->flags, pPID->val, pPID->val);
		printf("  [%2d] : Exit\n", i);
		if(boot_params.user_params.val)
			printf("User parameters is : \"%s\"\n", boot_params.string);
		
		printf("\nplease select item:");
		key = Uart_GetIntNum();
		if(key>=0&&key<i) {
			chg = 1;
			printf("please enter value:");
			i = key;
			if((&boot_params.start + i)==&boot_params.user_params) {
				//确保输入的字节数不超过127!
				char cmd[128];
				memset(cmd, 0, sizeof(cmd));
				Uart_GetString(cmd);
				strncpy(boot_params.string, cmd, strlen(cmd)+1);
				boot_params.user_params.val = strlen(cmd);
			} else {
				key = Uart_GetIntNum();
				(&boot_params.start + i)->val = key;
			}
		} else
			break;
	} while(1);
	
	if(chg) {
		printf("Do you want to save parameters? press y or Y for save.\n");
		key = getch();
		if(key=='y'||key=='Y')
			save_params();
	}
	
	return 0;
}