static int initr_env(void)
{
	/* initialize environment */
	if (should_load_env())
		env_relocate();
	else
		set_default_env(NULL);
#ifdef CONFIG_OF_CONTROL
	setenv_addr("fdtcontroladdr", gd->fdt_blob);
#endif

	/* Initialize from environment */
	load_addr = getenv_ulong("loadaddr", 16, load_addr);
#if defined(CONFIG_SYS_EXTBDINFO)
#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
#if defined(CONFIG_I2CFAST)
	/*
	 * set bi_iic_fast for linux taking environment variable
	 * "i2cfast" into account
	 */
	{
		char *s = getenv("i2cfast");

		if (s && ((*s == 'y') || (*s == 'Y'))) {
			gd->bd->bi_iic_fast[0] = 1;
			gd->bd->bi_iic_fast[1] = 1;
		}
	}
#endif /* CONFIG_I2CFAST */
#endif /* CONFIG_405GP, CONFIG_405EP */
#endif /* CONFIG_SYS_EXTBDINFO */
	return 0;
}

int env_relocate_r(void)
{
	/* initialize environment */
	env_relocate();

	return 0;
}

void mv_reset_environment(void)
{
	int i;
	char *s[MV_KEEP_ENTRIES];
	char entries[MV_KEEP_ENTRIES][MV_MAX_ENV_ENTRY_LENGTH];

	printf("\n*** RESET ENVIRONMENT ***\n");

	memset(entries, 0, MV_KEEP_ENTRIES * MV_MAX_ENV_ENTRY_LENGTH);
	for (i = 0; i < MV_KEEP_ENTRIES; i++) {
		s[i] = getenv(entries_to_keep[i]);
		if (s[i]) {
			printf("save '%s' : %s\n", entries_to_keep[i], s[i]);
			strncpy(entries[i], s[i], MV_MAX_ENV_ENTRY_LENGTH);
		}
	}

	gd->env_valid = 0;
	env_relocate();

	for (i = 0; i < MV_KEEP_ENTRIES; i++) {
		if (s[i]) {
			printf("restore '%s' : %s\n", entries_to_keep[i], s[i]);
			setenv(entries_to_keep[i], s[i]);
		}
	}

	saveenv();
}

static int sh_mem_env_init(void)
{
	mem_malloc_init(CONFIG_SYS_TEXT_BASE - GENERATED_GBL_DATA_SIZE -
			CONFIG_SYS_MALLOC_LEN, CONFIG_SYS_MALLOC_LEN - 16);
	env_relocate();
	jumptable_init();
	return 0;
}

int env_relocate_r(void)
{
	/* initialize environment */
	if (should_load_env())
		env_relocate();
	else
		set_default_env(NULL);

	return 0;
}

void board_init_r(gd_t *gd, ulong dest_addr)
{
	/* Pointer is writable since we allocated a register for it */
	gd = (gd_t *)CONFIG_SPL_GD_ADDR;
	bd_t *bd;

	memset(gd, 0, sizeof(gd_t));
	bd = (bd_t *)(CONFIG_SPL_GD_ADDR + sizeof(gd_t));
	memset(bd, 0, sizeof(bd_t));
	gd->bd = bd;
	bd->bi_memstart = CONFIG_SYS_INIT_L2_ADDR;
	bd->bi_memsize = CONFIG_SYS_L2_SIZE;

	probecpu();
	get_clocks();
	mem_malloc_init(CONFIG_SPL_RELOC_MALLOC_ADDR,
			CONFIG_SPL_RELOC_MALLOC_SIZE);
#ifndef CONFIG_SPL_NAND_BOOT
	env_init();
#endif
#ifdef CONFIG_SPL_MMC_BOOT
	mmc_initialize(bd);
#endif
	/* relocate environment function pointers etc. */
#ifdef CONFIG_SPL_NAND_BOOT
	nand_spl_load_image(CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
			    (uchar *)CONFIG_ENV_ADDR);

	gd->env_addr  = (ulong)(CONFIG_ENV_ADDR);
	gd->env_valid = 1;
#else
	env_relocate();
#endif

#ifdef CONFIG_SYS_I2C
	i2c_init_all();
#else
	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#endif

	gd->ram_size = initdram(0);
#ifdef CONFIG_SPL_NAND_BOOT
	puts("Tertiary program loader running in sram...");
#else
	puts("Second program loader running in sram...\n");
#endif

#ifdef CONFIG_SPL_MMC_BOOT
	mmc_boot();
#elif defined(CONFIG_SPL_SPI_BOOT)
	spi_boot();
#elif defined(CONFIG_SPL_NAND_BOOT)
	nand_boot();
#endif
}

static int initr_env(void)
{
	/* initialize environment */
	if (should_load_env())
		env_relocate();
	else
		set_default_env(NULL);
#ifdef CONFIG_OF_CONTROL
	env_set_addr("fdtcontroladdr", gd->fdt_blob);
#endif

	/* Initialize from environment */
	load_addr = env_get_ulong("loadaddr", 16, load_addr);

	return 0;
}

static int spl_net_load_image(struct spl_image_info *spl_image,
			      struct spl_boot_device *bootdev)
{
	struct image_header *header = (struct image_header *)load_addr;
	int rv;

	env_init();
	env_relocate();
	env_set("autoload", "yes");
	rv = eth_initialize();
	if (rv == 0) {
		printf("No Ethernet devices found\n");
		return -ENODEV;
	}
	if (bootdev->boot_device_name)
		env_set("ethact", bootdev->boot_device_name);
	rv = net_loop(BOOTP);
	if (rv < 0) {
		printf("Problem booting with BOOTP\n");
		return rv;
	}

	if (IS_ENABLED(CONFIG_SPL_LOAD_FIT) &&
	    image_get_magic(header) == FDT_MAGIC) {
		struct spl_load_info load;

		debug("Found FIT\n");
		load.bl_len = 1;
		load.read = spl_net_load_read;
		rv = spl_load_simple_fit(spl_image, &load, 0, header);
	} else {
		debug("Legacy image\n");

		rv = spl_parse_image_header(spl_image, header);
		if (rv)
			return rv;

		memcpy((void *)spl_image->load_addr, header, spl_image->size);
	}

	return rv;
}

void board_init (void)
{
	bd_t *bd;
	init_fnc_t **init_fnc_ptr;
	gd = (gd_t *) (CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_GBL_DATA_OFFSET);
	bd = (bd_t *) (CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_GBL_DATA_OFFSET \
						- GENERATED_BD_INFO_SIZE);
	char *s;
#if defined(CONFIG_CMD_FLASH)
	ulong flash_size = 0;
#endif
	asm ("nop");	/* FIXME gd is not initialize - wait */
	memset ((void *)gd, 0, GENERATED_GBL_DATA_SIZE);
	memset ((void *)bd, 0, GENERATED_BD_INFO_SIZE);
	gd->bd = bd;
	gd->baudrate = CONFIG_BAUDRATE;
	bd->bi_baudrate = CONFIG_BAUDRATE;
	bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
	bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
	gd->flags |= GD_FLG_RELOC;      /* tell others: relocation done */

	/*
	 * The Malloc area is immediately below the monitor copy in DRAM
	 * aka CONFIG_SYS_MONITOR_BASE - Note there is no need for reloc_off
	 * as our monitory code is run from SDRAM
	 */
	mem_malloc_init (CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);

	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
		WATCHDOG_RESET ();
		if ((*init_fnc_ptr) () != 0) {
			hang ();
		}
	}

	puts ("SDRAM :\n");
	printf ("\t\tIcache:%s\n", icache_status() ? "ON" : "OFF");
	printf ("\t\tDcache:%s\n", dcache_status() ? "ON" : "OFF");
	printf ("\tU-Boot Start:0x%08x\n", CONFIG_SYS_TEXT_BASE);

#if defined(CONFIG_CMD_FLASH)
	puts ("FLASH: ");
	bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
	if (0 < (flash_size = flash_init ())) {
		bd->bi_flashsize = flash_size;
		bd->bi_flashoffset = CONFIG_SYS_FLASH_BASE + flash_size;
# ifdef CONFIG_SYS_FLASH_CHECKSUM
		print_size (flash_size, "");
		/*
		 * Compute and print flash CRC if flashchecksum is set to 'y'
		 *
		 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
		 */
		s = getenv ("flashchecksum");
		if (s && (*s == 'y')) {
			printf ("  CRC: %08X",
				crc32 (0, (const unsigned char *) CONFIG_SYS_FLASH_BASE, flash_size)
			);
		}
		putc ('\n');
# else	/* !CONFIG_SYS_FLASH_CHECKSUM */
		print_size (flash_size, "\n");
# endif /* CONFIG_SYS_FLASH_CHECKSUM */
	} else {
		puts ("Flash init FAILED");
		bd->bi_flashstart = 0;
		bd->bi_flashsize = 0;
		bd->bi_flashoffset = 0;
	}
#endif

	/* relocate environment function pointers etc. */
	env_relocate ();

	/* Initialize stdio devices */
	stdio_init ();

	if ((s = getenv ("loadaddr")) != NULL) {
		load_addr = simple_strtoul (s, NULL, 16);
	}

#if defined(CONFIG_CMD_NET)
	/* IP Address */
	bd->bi_ip_addr = getenv_IPaddr("ipaddr");

	printf("Net:   ");
	eth_initialize(gd->bd);

	uchar enetaddr[6];
	eth_getenv_enetaddr("ethaddr", enetaddr);
	printf("MAC:   %pM\n", enetaddr);
#endif

	/* main_loop */
	for (;;) {
		WATCHDOG_RESET ();
		main_loop ();
	}
}

void board_init_r(gd_t *new_gd, ulong dest_addr)
{
	extern void malloc_bin_reloc (void);
#ifndef CONFIG_ENV_IS_NOWHERE
	extern char * env_name_spec;
#endif
	char *s;
	bd_t *bd;

	gd = new_gd;
	bd = gd->bd;

	gd->flags |= GD_FLG_RELOC;
	gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;

	/* Enable the MMU so that we can keep u-boot simple */
	mmu_init_r(dest_addr);

	board_early_init_r();

	monitor_flash_len = _edata - _text;

#if defined(CONFIG_NEEDS_MANUAL_RELOC)
	/*
	 * We have to relocate the command table manually
	 */
	fixup_cmdtable(&__u_boot_cmd_start,
		(ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
#endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */

	/* there are some other pointer constants we must deal with */
#ifndef CONFIG_ENV_IS_NOWHERE
	env_name_spec += gd->reloc_off;
#endif

	timer_init();

	/* The malloc area is right below the monitor image in RAM */
	mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
			CONFIG_SYS_MALLOC_LEN, CONFIG_SYS_MALLOC_LEN);
	malloc_bin_reloc();
	dma_alloc_init();

	enable_interrupts();

	bd->bi_flashstart = 0;
	bd->bi_flashsize = 0;
	bd->bi_flashoffset = 0;

#ifndef CONFIG_SYS_NO_FLASH
	bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
	bd->bi_flashsize = flash_init();
	bd->bi_flashoffset = (unsigned long)_edata - (unsigned long)_text;

	if (bd->bi_flashsize)
		display_flash_config();
#endif

	if (bd->bi_dram[0].size)
		display_dram_config();

	gd->bd->bi_boot_params = malloc(CONFIG_SYS_BOOTPARAMS_LEN);
	if (!gd->bd->bi_boot_params)
		puts("WARNING: Cannot allocate space for boot parameters\n");

	/* initialize environment */
	env_relocate();

	bd->bi_ip_addr = getenv_IPaddr ("ipaddr");

	stdio_init();
	jumptable_init();
	console_init_r();

	/* Initialize from environment */
	load_addr = getenv_ulong("loadaddr", 16, load_addr);

#ifdef CONFIG_BITBANGMII
	bb_miiphy_init();
#endif
#if defined(CONFIG_CMD_NET)
	s = getenv("bootfile");
	if (s)
		copy_filename(BootFile, s, sizeof(BootFile));
	puts("Net:   ");
	eth_initialize(gd->bd);
#endif

#ifdef CONFIG_GENERIC_ATMEL_MCI
	mmc_initialize(gd->bd);
#endif
	for (;;) {
		main_loop();
	}
}

/*
 * This is the next part if the initialization sequence: we are now
 * running from RAM and have a "normal" C environment, i. e. global
 * data can be written, BSS has been cleared, the stack size in not
 * that critical any more, etc.
 */
void board_init_r(gd_t *id, ulong dest_addr)
{
	char *s;
	bd_t *bd;
	ulong malloc_start;

	extern void malloc_bin_reloc(void);

	gd = id;
	bd = gd->bd;

	gd->flags |= GD_FLG_RELOC;	/* tell others: relocation done */

	monitor_flash_len = &_end - &_start;
	debug("monitor flash len: %08lX\n", monitor_flash_len);

	board_init();	/* Setup chipselects */

#if defined(CONFIG_NEEDS_MANUAL_RELOC)
	/*
	 * We have to relocate the command table manually
	 */
	fixup_cmdtable(&__u_boot_cmd_start,
		(ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
#endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */

#ifdef CONFIG_SERIAL_MULTI
	serial_initialize();
#endif

	debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);

	/* The Malloc area is immediately below the monitor copy in DRAM */
	malloc_start = dest_addr - TOTAL_MALLOC_LEN;
	mem_malloc_init(malloc_start, TOTAL_MALLOC_LEN);
	malloc_bin_reloc();

#ifndef CONFIG_SYS_NO_FLASH
	/* configure available FLASH banks */
	gd->bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
	gd->bd->bi_flashsize = flash_init();
	gd->bd->bi_flashoffset = CONFIG_SYS_FLASH_BASE + gd->bd->bi_flashsize;

	if (gd->bd->bi_flashsize)
			display_flash_config(gd->bd->bi_flashsize);
#endif /* CONFIG_SYS_NO_FLASH */

#if defined(CONFIG_CMD_NAND)
	puts("NAND:  ");
	nand_init();		/* go init the NAND */
#endif

#if defined(CONFIG_CMD_IDE)
	puts("IDE:   ");
	ide_init();
#endif

#ifdef CONFIG_GENERIC_MMC
	puts("MMC:   ");
	mmc_initialize(gd->bd);
#endif

	/* initialize environment */
	env_relocate();

#if defined(CONFIG_CMD_PCI) || defined(CONFIG_PCI)
	nds32_pci_init();
#endif

	/* IP Address */
	gd->bd->bi_ip_addr = getenv_IPaddr("ipaddr");

	stdio_init();	/* get the devices list going. */

	jumptable_init();

#if defined(CONFIG_API)
	/* Initialize API */
	api_init();
#endif

	console_init_r();	/* fully init console as a device */

#if defined(CONFIG_ARCH_MISC_INIT)
	/* miscellaneous arch dependent initialisations */
	arch_misc_init();
#endif
#if defined(CONFIG_MISC_INIT_R)
	/* miscellaneous platform dependent initialisations */
	misc_init_r();
#endif

#if defined(CONFIG_USE_IRQ)
	/* set up exceptions */
//.........这里部分代码省略.........

void board_init (void)
{
	bd_t *bd;
	init_fnc_t **init_fnc_ptr;
	static gd_t gd_data;
	static bd_t bd_data;

	/* Pointer is writable since we allocated a register for it. */
	gd = &gd_data;
	/* compiler optimization barrier needed for GCC >= 3.4 */
	__asm__ __volatile__("": : :"memory");

	gd->bd = &bd_data;
	gd->baudrate = CONFIG_BAUDRATE;
	gd->cpu_clk = CONFIG_SYS_CLK_FREQ;

	bd = gd->bd;
	bd->bi_memstart	= CONFIG_SYS_SDRAM_BASE;
	bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
#ifndef CONFIG_SYS_NO_FLASH
	bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
#endif
#if	defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
	bd->bi_sramstart= CONFIG_SYS_SRAM_BASE;
	bd->bi_sramsize	= CONFIG_SYS_SRAM_SIZE;
#endif
	bd->bi_baudrate	= CONFIG_BAUDRATE;

	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
		WATCHDOG_RESET ();
		if ((*init_fnc_ptr) () != 0) {
			hang ();
		}
	}

	WATCHDOG_RESET ();

	/* The Malloc area is immediately below the monitor copy in RAM */
	mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);

#ifndef CONFIG_SYS_NO_FLASH
	WATCHDOG_RESET ();
	bd->bi_flashsize = flash_init();
#endif

#ifdef CONFIG_CMD_NAND
	puts("NAND:  ");
	nand_init();
#endif

#ifdef CONFIG_GENERIC_MMC
	puts("MMC:   ");
	mmc_initialize(bd);
#endif

	WATCHDOG_RESET ();
	env_relocate();

	WATCHDOG_RESET ();
	stdio_init();
	jumptable_init();
	console_init_r();

	WATCHDOG_RESET ();
	interrupt_init ();

#if defined(CONFIG_BOARD_LATE_INIT)
	board_late_init ();
#endif

#if defined(CONFIG_CMD_NET)
	puts ("Net:   ");
	eth_initialize (bd);
#endif

	/* main_loop */
	for (;;) {
		WATCHDOG_RESET ();
		main_loop ();
	}
}

void board_init_r(gd_t *id, ulong dest_addr)
{

	if (id)
		gd = id;

	gd->flags |= GD_FLG_RELOC;	/* tell others: relocation done */

#ifdef CONFIG_SERIAL_MULTI
	serial_initialize();
#endif

#ifdef CONFIG_POST
	post_output_backlog();
#endif

	/* The Malloc area is at the top of simulated DRAM */
	mem_malloc_init((ulong)gd->ram_buf + gd->ram_size - TOTAL_MALLOC_LEN,
			TOTAL_MALLOC_LEN);

	/* initialize environment */
	env_relocate();

	/* IP Address */
	gd->bd->bi_ip_addr = getenv_IPaddr("ipaddr");

	stdio_init();	/* get the devices list going. */

	jumptable_init();

	console_init_r();	/* fully init console as a device */

#if defined(CONFIG_DISPLAY_BOARDINFO_LATE)
	checkboard();
#endif

#if defined(CONFIG_ARCH_MISC_INIT)
	/* miscellaneous arch dependent initialisations */
	arch_misc_init();
#endif
#if defined(CONFIG_MISC_INIT_R)
	/* miscellaneous platform dependent initialisations */
	misc_init_r();
#endif

	 /* set up exceptions */
	interrupt_init();
	/* enable exceptions */
	enable_interrupts();

#ifdef CONFIG_BOARD_LATE_INIT
	board_late_init();
#endif

#ifdef CONFIG_POST
	post_run(NULL, POST_RAM | post_bootmode_get(0));
#endif

	sandbox_main_loop_init();

	/*
	 * For now, run the main loop. Later we might let this be done
	 * in the main program.
	 */
	while (1)
		main_loop();

	/* NOTREACHED - no way out of command loop except booting */
}

void board_init_r(gd_t *id, ulong dest_addr)
{
#ifndef CONFIG_SYS_NO_FLASH
	ulong size;
#endif
	extern void malloc_bin_reloc(void);
#ifndef CONFIG_ENV_IS_NOWHERE
	extern char *env_name_spec;
#endif
	bd_t *bd;

	gd = id;
	gd->flags |= GD_FLG_RELOC;	/* tell others: relocation done */

	debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);

	gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;

	monitor_flash_len = (ulong)&uboot_end_data - dest_addr;

#if defined(CONFIG_NEEDS_MANUAL_RELOC)
	/*
	 * We have to relocate the command table manually
	 */
	fixup_cmdtable(&__u_boot_cmd_start,
		(ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
#endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */

	/* there are some other pointer constants we must deal with */
#ifndef CONFIG_ENV_IS_NOWHERE
	env_name_spec += gd->reloc_off;
#endif

	bd = gd->bd;

	/* The Malloc area is immediately below the monitor copy in DRAM */
	mem_malloc_init(CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
			TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
	malloc_bin_reloc();

#ifndef CONFIG_SYS_NO_FLASH
	/* configure available FLASH banks */
	size = flash_init();
	display_flash_config(size);
	bd->bi_flashsize = size;
#endif

	bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
#if CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
	bd->bi_flashoffset = monitor_flash_len;	/* reserved area for U-Boot */
#else
	bd->bi_flashoffset = 0;
#endif

#ifdef CONFIG_CMD_NAND
	puts("NAND:  ");
	nand_init();		/* go init the NAND */
#endif

#if defined(CONFIG_CMD_ONENAND)
	onenand_init();
#endif

	/* relocate environment function pointers etc. */
	env_relocate();

	/* IP Address */
	bd->bi_ip_addr = getenv_IPaddr("ipaddr");

#if defined(CONFIG_PCI)
	/*
	 * Do pci configuration
	 */
	pci_init();
#endif

/** leave this here (after malloc(), environment and PCI are working) **/
	/* Initialize stdio devices */
	stdio_init();

	jumptable_init();

	/* Initialize the console (after the relocation and devices init) */
	console_init_r();
/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/

	/* Initialize from environment */
	load_addr = getenv_ulong("loadaddr", 16, load_addr);
#if defined(CONFIG_CMD_NET)
	{
		char *s = getenv("bootfile");

		if (s != NULL)
			copy_filename(BootFile, s, sizeof(BootFile));
	}
#endif

#ifdef CONFIG_CMD_SPI
	puts("SPI:   ");
	spi_init();		/* go init the SPI */
//.........这里部分代码省略.........

void start_armboot (void)
{
	init_fnc_t **init_fnc_ptr;
	char *s;
	int mmc_exist = 0;
#if defined(CONFIG_VFD) || defined(CONFIG_LCD)
	unsigned long addr;
#endif

	/* Pointer is writable since we allocated a register for it */
	gd = (gd_t*)(_armboot_start - CONFIG_SYS_MALLOC_LEN - sizeof(gd_t));
	/* compiler optimization barrier needed for GCC >= 3.4 */
	__asm__ __volatile__("": : :"memory");

	memset ((void*)gd, 0, sizeof (gd_t));
	gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
	memset (gd->bd, 0, sizeof (bd_t));

//	gd->flags |= GD_FLG_RELOC;

	monitor_flash_len = _bss_start - _armboot_start;

	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
		if ((*init_fnc_ptr)() != 0) {
			hang ();
		}
	}

	/* armboot_start is defined in the board-specific linker script */
	mem_malloc_init (_armboot_start - CONFIG_SYS_MALLOC_LEN,
			CONFIG_SYS_MALLOC_LEN);

#ifndef CONFIG_SYS_NO_FLASH
	/* configure available FLASH banks */
	display_flash_config (flash_init ());
#endif /* CONFIG_SYS_NO_FLASH */

#ifdef CONFIG_VFD
#	ifndef PAGE_SIZE
#	  define PAGE_SIZE 4096
#	endif
	/*
	 * reserve memory for VFD display (always full pages)
	 */
	/* bss_end is defined in the board-specific linker script */
	addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
	vfd_setmem (addr);
	gd->fb_base = addr;
#endif /* CONFIG_VFD */

#ifdef CONFIG_LCD
	/* board init may have inited fb_base */
	if (!gd->fb_base) {
#		ifndef PAGE_SIZE
#		  define PAGE_SIZE 4096
#		endif
		/*
		 * reserve memory for LCD display (always full pages)
		 */
		/* bss_end is defined in the board-specific linker script */
		addr = (_bss_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
		lcd_setmem (addr);
		gd->fb_base = addr;
	}
#endif /* CONFIG_LCD */

#if defined(CONFIG_CMD_NAND)
	puts ("NAND:	");
	nand_init();		/* go init the NAND */
#endif

#if defined(CONFIG_CMD_ONENAND)
	onenand_init();
#endif

#ifdef CONFIG_GENERIC_MMC
	puts ("MMC:   ");
	mmc_exist = mmc_initialize (gd->bd);
	if (mmc_exist != 0)
	{
		puts ("0 MB\n");
	}

#endif


#ifdef CONFIG_HAS_DATAFLASH
	AT91F_DataflashInit();
	dataflash_print_info();
#endif

	/* initialize environment */
	env_relocate ();

#ifdef CONFIG_VFD
	/* must do this after the framebuffer is allocated */
	drv_vfd_init();
#endif /* CONFIG_VFD */

#ifdef CONFIG_SERIAL_MULTI
//.........这里部分代码省略.........

void board_init(void)
{
	bd_t *bd;
	int i;

	gd = (gd_t *)CONFIG_SYS_GBL_DATA_ADDR;

	memset((void *)gd, 0, GENERATED_GBL_DATA_SIZE);

	gd->bd = (bd_t *)(gd+1);	/* At end of global data */
	gd->baudrate = CONFIG_BAUDRATE;
	gd->cpu_clk = CONFIG_SYS_CLK_FREQ;

	bd = gd->bd;
	bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
	bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
#ifndef CONFIG_SYS_NO_FLASH
	bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
#endif
#if	defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
	bd->bi_sramstart = CONFIG_SYS_SRAM_BASE;
	bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;
#endif
	bd->bi_baudrate = CONFIG_BAUDRATE;

	for (i = 0; i < ARRAY_SIZE(init_sequence); i++) {
		WATCHDOG_RESET();
		if (init_sequence[i]())
			hang();
	}

	WATCHDOG_RESET();

	/* The Malloc area is immediately below the monitor copy in RAM */
	mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);

#ifndef CONFIG_SYS_NO_FLASH
	WATCHDOG_RESET();
	bd->bi_flashsize = flash_init();
#endif

#ifdef CONFIG_CMD_NAND
	puts("NAND:  ");
	nand_init();
#endif

#ifdef CONFIG_GENERIC_MMC
	puts("MMC:   ");
	mmc_initialize(bd);
#endif

	WATCHDOG_RESET();
	env_relocate();

	WATCHDOG_RESET();
	stdio_init();
	jumptable_init();
	console_init_r();

	WATCHDOG_RESET();
	interrupt_init();

#if defined(CONFIG_BOARD_LATE_INIT)
	board_late_init();
#endif

#if defined(CONFIG_CMD_NET)
	puts("NET:   ");
	eth_initialize(bd);
#endif

	/* main_loop */
	for (;;) {
		WATCHDOG_RESET();
		main_loop();
	}
}

void board_init_r(gd_t *id, ulong dest_addr)
{
	ulong malloc_start;
#if !defined(CONFIG_SYS_NO_FLASH)
	ulong flash_size;
#endif

	gd->flags |= GD_FLG_RELOC;	/* tell others: relocation done */
	bootstage_mark_name(BOOTSTAGE_ID_START_UBOOT_R, "board_init_r");

	monitor_flash_len = (ulong)&__rel_dyn_end - (ulong)_start;

	/* Enable caches */
	enable_caches();

	debug("monitor flash len: %08lX\n", monitor_flash_len);
	board_init();	/* Setup chipselects */
	/*
	 * TODO: printing of the clock inforamtion of the board is now
	 * implemented as part of bdinfo command. Currently only support for
	 * davinci SOC's is added. Remove this check once all the board
	 * implement this.
	 */
#ifdef CONFIG_CLOCKS
	set_cpu_clk_info(); /* Setup clock information */
#endif
	serial_initialize();

	debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);

#ifdef CONFIG_LOGBUFFER
	logbuff_init_ptrs();
#endif
#ifdef CONFIG_POST
	post_output_backlog();
#endif

	/* The Malloc area is immediately below the monitor copy in DRAM */
	malloc_start = dest_addr - TOTAL_MALLOC_LEN;
	mem_malloc_init (malloc_start, TOTAL_MALLOC_LEN);

#ifdef CONFIG_ARCH_EARLY_INIT_R
	arch_early_init_r();
#endif
	power_init_board();

#if !defined(CONFIG_SYS_NO_FLASH)
	puts("Flash: ");

	flash_size = flash_init();
	if (flash_size > 0) {
# ifdef CONFIG_SYS_FLASH_CHECKSUM
		print_size(flash_size, "");
		/*
		 * Compute and print flash CRC if flashchecksum is set to 'y'
		 *
		 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
		 */
		if (getenv_yesno("flashchecksum") == 1) {
			printf("  CRC: %08X", crc32(0,
				(const unsigned char *) CONFIG_SYS_FLASH_BASE,
				flash_size));
		}
		putc('\n');
# else	/* !CONFIG_SYS_FLASH_CHECKSUM */
		print_size(flash_size, "\n");
# endif /* CONFIG_SYS_FLASH_CHECKSUM */
	} else {
		puts(failed);
		hang();
	}
#endif

#if defined(CONFIG_CMD_NAND)
	puts("NAND:  ");
	nand_init();		/* go init the NAND */
#endif

#if defined(CONFIG_CMD_ONENAND)
	onenand_init();
#endif

#ifdef CONFIG_GENERIC_MMC
	puts("MMC:   ");
	mmc_initialize(gd->bd);
#endif

#ifdef CONFIG_CMD_SCSI
	puts("SCSI:  ");
	scsi_init();
#endif

#ifdef CONFIG_HAS_DATAFLASH
	AT91F_DataflashInit();
	dataflash_print_info();
#endif

	/* initialize environment */
	if (should_load_env())
		env_relocate();
//.........这里部分代码省略.........

//.........这里部分代码省略.........
     * The Malloc area is immediately below the monitor copy in DRAM
     * aka CONFIG_SYS_MONITOR_BASE - Note there is no need for reloc_off
     * as our monitory code is run from SDRAM
     */
    mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);

    serial_initialize();

#ifdef CONFIG_XILINX_TB_WATCHDOG
    hw_watchdog_init();
#endif
    for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
        WATCHDOG_RESET();
        if ((*init_fnc_ptr) () != 0)
            hang();
    }

#ifndef CONFIG_SPL_BUILD
#ifdef CONFIG_OF_CONTROL
    /* For now, put this check after the console is ready */
    if (fdtdec_prepare_fdt())
        panic("** No FDT - please see doc/README.fdt-control");
    else
        printf("DTB: 0x%x\n", (u32)gd->fdt_blob);
#endif

    puts("SDRAM :\n");
    printf("\t\tIcache:%s\n", icache_status() ? "ON" : "OFF");
    printf("\t\tDcache:%s\n", dcache_status() ? "ON" : "OFF");
    printf("\tU-Boot Start:0x%08x\n", CONFIG_SYS_TEXT_BASE);

#if defined(CONFIG_CMD_FLASH)
    puts("Flash: ");
    bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
    flash_size = flash_init();
    if (bd->bi_flashstart && flash_size > 0) {
# ifdef CONFIG_SYS_FLASH_CHECKSUM
        print_size(flash_size, "");
        /*
         * Compute and print flash CRC if flashchecksum is set to 'y'
         *
         * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
         */
        if (getenv_yesno("flashchecksum") == 1) {
            printf("  CRC: %08X",
                   crc32(0, (const u8 *)bd->bi_flashstart,
                         flash_size)
                  );
        }
        putc('\n');
# else	/* !CONFIG_SYS_FLASH_CHECKSUM */
        print_size(flash_size, "\n");
# endif /* CONFIG_SYS_FLASH_CHECKSUM */
        bd->bi_flashsize = flash_size;
        bd->bi_flashoffset = bd->bi_flashstart + flash_size;
    } else {
        puts("Flash init FAILED");
        bd->bi_flashstart = 0;
        bd->bi_flashsize = 0;
        bd->bi_flashoffset = 0;
    }
#endif

#ifdef CONFIG_SPI
    spi_init();
#endif

    /* relocate environment function pointers etc. */
    env_relocate();

    /* Initialize stdio devices */
    stdio_init();

    /* Initialize the jump table for applications */
    jumptable_init();

    /* Initialize the console (after the relocation and devices init) */
    console_init_r();

    board_init();

    /* Initialize from environment */
    load_addr = getenv_ulong("loadaddr", 16, load_addr);

#if defined(CONFIG_CMD_NET)
    printf("Net:   ");
    eth_initialize(gd->bd);

    uchar enetaddr[6];
    eth_getenv_enetaddr("ethaddr", enetaddr);
    printf("MAC:   %pM\n", enetaddr);
#endif

    /* main_loop */
    for (;;) {
        WATCHDOG_RESET();
        main_loop();
    }
#endif /* CONFIG_SPL_BUILD */
}

void board_init_r(gd_t *id, ulong dest_addr)
{
    char *s;
    ulong size;
    static bd_t bd_data;
    static gd_t gd_data;
    init_fnc_t **init_fnc_ptr;

    show_boot_progress(0x21);

    /* Global data pointer is now writable */
    gd = &gd_data;
    memcpy(gd, id, sizeof(gd_t));

    /* compiler optimization barrier needed for GCC >= 3.4 */
    __asm__ __volatile__("": : :"memory");

    gd->bd = &bd_data;
    memset (gd->bd, 0, sizeof (bd_t));
    show_boot_progress(0x22);

    gd->baudrate =  CONFIG_BAUDRATE;

    mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
                    CONFIG_SYS_MALLOC_LEN);

    for (init_fnc_ptr = init_sequence_r; *init_fnc_ptr; ++init_fnc_ptr) {
        if ((*init_fnc_ptr)() != 0)
            hang ();
    }
    show_boot_progress(0x23);

#ifdef CONFIG_SERIAL_MULTI
    serial_initialize();
#endif
    /* configure available FLASH banks */
    size = flash_init();
    display_flash_config(size);
    show_boot_progress(0x24);

    show_boot_progress(0x25);

    /* initialize environment */
    env_relocate ();
    show_boot_progress(0x26);


#ifdef CONFIG_CMD_NET
    /* IP Address */
    bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
#endif

#if defined(CONFIG_PCI)
    /*
     * Do pci configuration
     */
    pci_init();
#endif

    show_boot_progress(0x27);


    stdio_init ();

    jumptable_init ();

    /* Initialize the console (after the relocation and devices init) */
    console_init_r();

#ifdef CONFIG_MISC_INIT_R
    /* miscellaneous platform dependent initialisations */
    misc_init_r();
#endif

#if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
    WATCHDOG_RESET();
    puts ("PCMCIA:");
    pcmcia_init();
#endif

#if defined(CONFIG_CMD_KGDB)
    WATCHDOG_RESET();
    puts("KGDB:  ");
    kgdb_init();
#endif

    /* enable exceptions */
    enable_interrupts();
    show_boot_progress(0x28);

#ifdef CONFIG_STATUS_LED
    status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
#endif

    udelay(20);

    /* Initialize from environment */
    load_addr = getenv_ulong("loadaddr", 16, load_addr);
#if defined(CONFIG_CMD_NET)
    if ((s = getenv ("bootfile")) != NULL) {
//.........这里部分代码省略.........

//.........这里部分代码省略.........

	WATCHDOG_RESET();

	/* initialize higher level parts of CPU like time base and timers */
	cpu_init_r();

	WATCHDOG_RESET();

#ifdef CONFIG_SPI
#if !defined(CONFIG_ENV_IS_IN_EEPROM)
	spi_init_f();
#endif
	spi_init_r();
#endif

#if defined(CONFIG_CMD_NAND)
	WATCHDOG_RESET();
	puts("NAND:  ");
	nand_init();		/* go init the NAND */
#endif

#ifdef CONFIG_GENERIC_MMC
/*
 * MMC initialization is called before relocating env.
 * Thus It is required that operations like pin multiplexer
 * be put in board_init.
 */
	WATCHDOG_RESET();
	puts("MMC:  ");
	mmc_initialize(bd);
#endif

	/* relocate environment function pointers etc. */
	env_relocate();

	/*
	 * after non-volatile devices & environment is setup and cpu code have
	 * another round to deal with any initialization that might require
	 * full access to the environment or loading of some image (firmware)
	 * from a non-volatile device
	 */
	cpu_secondary_init_r();

	/*
	 * Fill in missing fields of bd_info.
	 * We do this here, where we have "normal" access to the
	 * environment; we used to do this still running from ROM,
	 * where had to use getenv_f(), which can be pretty slow when
	 * the environment is in EEPROM.
	 */

#if defined(CONFIG_SYS_EXTBDINFO)
#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
#if defined(CONFIG_I2CFAST)
	/*
	 * set bi_iic_fast for linux taking environment variable
	 * "i2cfast" into account
	 */
	{
		if (getenv_yesno("i2cfast") == 1) {
			bd->bi_iic_fast[0] = 1;
			bd->bi_iic_fast[1] = 1;
		}
	}
#endif /* CONFIG_I2CFAST */
#endif /* CONFIG_405GP, CONFIG_405EP */