u-boot/arch/powerpc/lib/board.c

/*
 * (C) Copyright 2000-2011
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <malloc.h>
#include <stdio_dev.h>
#ifdef CONFIG_8xx
#include <mpc8xx.h>
#endif
#ifdef CONFIG_5xx
#include <mpc5xx.h>
#endif
#ifdef CONFIG_MPC5xxx
#include <mpc5xxx.h>
#endif
#if defined(CONFIG_CMD_IDE)
#include <ide.h>
#endif
#if defined(CONFIG_CMD_SCSI)
#include <scsi.h>
#endif
#if defined(CONFIG_CMD_KGDB)
#include <kgdb.h>
#endif
#ifdef CONFIG_STATUS_LED
#include <status_led.h>
#endif
#include <net.h>
#ifdef CONFIG_GENERIC_MMC
#include <mmc.h>
#endif
#include <serial.h>
#ifdef CONFIG_SYS_ALLOC_DPRAM
#if !defined(CONFIG_CPM2)
#include <commproc.h>
#endif
#endif
#include <version.h>
#if defined(CONFIG_BAB7xx)
#include <w83c553f.h>
#endif
#include <dtt.h>
#if defined(CONFIG_POST)
#include <post.h>
#endif
#if defined(CONFIG_LOGBUFFER)
#include <logbuff.h>
#endif
#if defined(CONFIG_SYS_INIT_RAM_LOCK) && defined(CONFIG_E500)
#include <asm/cache.h>
#endif
#ifdef CONFIG_PS2KBD
#include <keyboard.h>
#endif

#ifdef CONFIG_ADDR_MAP
#include <asm/mmu.h>
#endif

#ifdef CONFIG_MP
#include <asm/mp.h>
#endif

#ifdef CONFIG_BITBANGMII
#include <miiphy.h>
#endif

#ifdef CONFIG_SYS_UPDATE_FLASH_SIZE
extern int update_flash_size(int flash_size);
#endif

#if defined(CONFIG_SC3)
extern void sc3_read_eeprom(void);
#endif

#if defined(CONFIG_CMD_DOC)
void doc_init(void);
#endif
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
#include <i2c.h>
#endif
#include <spi.h>
#include <nand.h>

static char *failed = "*** failed ***\n";

#if defined(CONFIG_OXC) || defined(CONFIG_RMU)
extern flash_info_t flash_info[];
#endif

#if defined(CONFIG_START_IDE)
extern int board_start_ide(void);
#endif
#include <environment.h>

DECLARE_GLOBAL_DATA_PTR;

#if !defined(CONFIG_SYS_MEM_TOP_HIDE)
#define CONFIG_SYS_MEM_TOP_HIDE	0
#endif

extern ulong __init_end;
extern ulong __bss_end;
ulong monitor_flash_len;

#if defined(CONFIG_CMD_BEDBUG)
#include <bedbug/type.h>
#endif

/*
 * Utilities
 */

/*
 * All attempts to come up with a "common" initialization sequence
 * that works for all boards and architectures failed: some of the
 * requirements are just _too_ different. To get rid of the resulting
 * mess of board dependend #ifdef'ed code we now make the whole
 * initialization sequence configurable to the user.
 *
 * The requirements for any new initalization function is simple: it
 * receives a pointer to the "global data" structure as it's only
 * argument, and returns an integer return code, where 0 means
 * "continue" and != 0 means "fatal error, hang the system".
 */
typedef int (init_fnc_t)(void);

/*
 * Init Utilities
 *
 * Some of this code should be moved into the core functions,
 * but let's get it working (again) first...
 */

static int init_baudrate(void)
{
	gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
	return 0;
}

/***********************************************************************/

static void __board_add_ram_info(int use_default)
{
	/* please define platform specific board_add_ram_info() */
}

void board_add_ram_info(int)
	__attribute__ ((weak, alias("__board_add_ram_info")));

static int __board_flash_wp_on(void)
{
	/*
	 * Most flashes can't be detected when write protection is enabled,
	 * so provide a way to let U-Boot gracefully ignore write protected
	 * devices.
	 */
	return 0;
}

int board_flash_wp_on(void)
	__attribute__ ((weak, alias("__board_flash_wp_on")));

static void __cpu_secondary_init_r(void)
{
}

void cpu_secondary_init_r(void)
	__attribute__ ((weak, alias("__cpu_secondary_init_r")));

static int init_func_ram(void)
{
#ifdef	CONFIG_BOARD_TYPES
	int board_type = gd->board_type;
#else
	int board_type = 0;	/* use dummy arg */
#endif
	puts("DRAM:  ");

	gd->ram_size = initdram(board_type);

	if (gd->ram_size > 0) {
		print_size(gd->ram_size, "");
		board_add_ram_info(0);
		putc('\n');
		return 0;
	}
	puts(failed);
	return 1;
}

/***********************************************************************/

#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
static int init_func_i2c(void)
{
	puts("I2C:   ");
#ifdef CONFIG_SYS_I2C
	i2c_init_all();
#else
	i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
#endif
	puts("ready\n");
	return 0;
}
#endif

#if defined(CONFIG_HARD_SPI)
static int init_func_spi(void)
{
	puts("SPI:   ");
	spi_init();
	puts("ready\n");
	return 0;
}
#endif

/***********************************************************************/

#if defined(CONFIG_WATCHDOG)
int init_func_watchdog_init(void)
{
	puts("       Watchdog enabled\n");
	WATCHDOG_RESET();
	return 0;
}

int init_func_watchdog_reset(void)
{
	WATCHDOG_RESET();
	return 0;
}
#endif /* CONFIG_WATCHDOG */

/*
 * Initialization sequence
 */

static init_fnc_t *init_sequence[] = {
#if defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx)
	probecpu,
#endif
#if defined(CONFIG_BOARD_EARLY_INIT_F)
	board_early_init_f,
#endif
#if !defined(CONFIG_8xx_CPUCLK_DEFAULT)
	get_clocks,		/* get CPU and bus clocks (etc.) */
#if defined(CONFIG_TQM8xxL) && !defined(CONFIG_TQM866M) \
    && !defined(CONFIG_TQM885D)
	adjust_sdram_tbs_8xx,
#endif
	init_timebase,
#endif
#ifdef CONFIG_SYS_ALLOC_DPRAM
#if !defined(CONFIG_CPM2)
	dpram_init,
#endif
#endif
#if defined(CONFIG_BOARD_POSTCLK_INIT)
	board_postclk_init,
#endif
	env_init,
#if defined(CONFIG_8xx_CPUCLK_DEFAULT)
	/* get CPU and bus clocks according to the environment variable */
	get_clocks_866,
	/* adjust sdram refresh rate according to the new clock */
	sdram_adjust_866,
	init_timebase,
#endif
	init_baudrate,
	serial_init,
	console_init_f,
	display_options,
#if defined(CONFIG_MPC8260)
	prt_8260_rsr,
	prt_8260_clks,
#endif /* CONFIG_MPC8260 */
#if defined(CONFIG_MPC83xx)
	prt_83xx_rsr,
#endif
	checkcpu,
#if defined(CONFIG_MPC5xxx)
	prt_mpc5xxx_clks,
#endif /* CONFIG_MPC5xxx */
	checkboard,
	INIT_FUNC_WATCHDOG_INIT
#if defined(CONFIG_MISC_INIT_F)
	misc_init_f,
#endif
	INIT_FUNC_WATCHDOG_RESET
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
	init_func_i2c,
#endif
#if defined(CONFIG_HARD_SPI)
	init_func_spi,
#endif
#ifdef CONFIG_POST
	post_init_f,
#endif
	INIT_FUNC_WATCHDOG_RESET
	init_func_ram,
#if defined(CONFIG_SYS_DRAM_TEST)
	testdram,
#endif /* CONFIG_SYS_DRAM_TEST */
	INIT_FUNC_WATCHDOG_RESET
	NULL,	/* Terminate this list */
};

static int __fixup_cpu(void)
{
	return 0;
}

int fixup_cpu(void) __attribute__((weak, alias("__fixup_cpu")));

/*
 * This is the first part of the initialization sequence that is
 * implemented in C, but still running from ROM.
 *
 * The main purpose is to provide a (serial) console interface as
 * soon as possible (so we can see any error messages), and to
 * initialize the RAM so that we can relocate the monitor code to
 * RAM.
 *
 * Be aware of the restrictions: global data is read-only, BSS is not
 * initialized, and stack space is limited to a few kB.
 */

void board_init_f(ulong bootflag)
{
	bd_t *bd;
	ulong len, addr, addr_sp;
	ulong *s;
	gd_t *id;
	init_fnc_t **init_fnc_ptr;

#ifdef CONFIG_PRAM
	ulong reg;
#endif
#ifdef CONFIG_DEEP_SLEEP
	const ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
	struct ccsr_scfg *scfg = (void *)CONFIG_SYS_MPC85xx_SCFG;
	u32 start_addr;
	typedef void (*func_t)(void);
	func_t kernel_resume;
#endif

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

#if !defined(CONFIG_CPM2) && !defined(CONFIG_MPC512X) && \
    !defined(CONFIG_MPC83xx) && !defined(CONFIG_MPC85xx) && \
    !defined(CONFIG_MPC86xx)
	/* Clear initial global data */
	memset((void *) gd, 0, sizeof(gd_t));
#endif

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

#ifdef CONFIG_DEEP_SLEEP
	/* Jump to kernel in deep sleep case */
	if (in_be32(&gur->scrtsr[0]) & (1 << 3)) {
		l2cache_init();
#if defined(CONFIG_RAMBOOT_PBL)
		disable_cpc_sram();
#endif
		enable_cpc();
		start_addr = in_be32(&scfg->sparecr[1]);
		kernel_resume = (func_t)start_addr;
		kernel_resume();
	}
#endif

#ifdef CONFIG_POST
	post_bootmode_init();
	post_run(NULL, POST_ROM | post_bootmode_get(NULL));
#endif

	WATCHDOG_RESET();

	/*
	 * Now that we have DRAM mapped and working, we can
	 * relocate the code and continue running from DRAM.
	 *
	 * Reserve memory at end of RAM for (top down in that order):
	 *  - area that won't get touched by U-Boot and Linux (optional)
	 *  - kernel log buffer
	 *  - protected RAM
	 *  - LCD framebuffer
	 *  - monitor code
	 *  - board info struct
	 */
	len = (ulong)&__bss_end - CONFIG_SYS_MONITOR_BASE;

	/*
	 * Subtract specified amount of memory to hide so that it won't
	 * get "touched" at all by U-Boot. By fixing up gd->ram_size
	 * the Linux kernel should now get passed the now "corrected"
	 * memory size and won't touch it either. This should work
	 * for arch/ppc and arch/powerpc. Only Linux board ports in
	 * arch/powerpc with bootwrapper support, that recalculate the
	 * memory size from the SDRAM controller setup will have to
	 * get fixed.
	 */
	gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE;

	addr = CONFIG_SYS_SDRAM_BASE + get_effective_memsize();

#if defined(CONFIG_MP) && (defined(CONFIG_MPC86xx) || defined(CONFIG_E500))
	/*
	 * We need to make sure the location we intend to put secondary core
	 * boot code is reserved and not used by any part of u-boot
	 */
	if (addr > determine_mp_bootpg(NULL)) {
		addr = determine_mp_bootpg(NULL);
		debug("Reserving MP boot page to %08lx\n", addr);
	}
#endif

#ifdef CONFIG_LOGBUFFER
#ifndef CONFIG_ALT_LB_ADDR
	/* reserve kernel log buffer */
	addr -= (LOGBUFF_RESERVE);
	debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN,
	      addr);
#endif
#endif

#ifdef CONFIG_PRAM
	/*
	 * reserve protected RAM
	 */
	reg = getenv_ulong("pram", 10, CONFIG_PRAM);
	addr -= (reg << 10);	/* size is in kB */
	debug("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
#endif /* CONFIG_PRAM */

	/* round down to next 4 kB limit */
	addr &= ~(4096 - 1);
	debug("Top of RAM usable for U-Boot at: %08lx\n", addr);

#ifdef CONFIG_LCD
#ifdef CONFIG_FB_ADDR
	gd->fb_base = CONFIG_FB_ADDR;
#else
	/* reserve memory for LCD display (always full pages) */
	addr = lcd_setmem(addr);
	gd->fb_base = addr;
#endif /* CONFIG_FB_ADDR */
#endif /* CONFIG_LCD */

#if defined(CONFIG_VIDEO) && defined(CONFIG_8xx)
	/* reserve memory for video display (always full pages) */
	addr = video_setmem(addr);
	gd->fb_base = addr;
#endif /* CONFIG_VIDEO  */

	/*
	 * reserve memory for U-Boot code, data & bss
	 * round down to next 4 kB limit
	 */
	addr -= len;
	addr &= ~(4096 - 1);
#ifdef CONFIG_E500
	/* round down to next 64 kB limit so that IVPR stays aligned */
	addr &= ~(65536 - 1);
#endif

	debug("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);

	/*
	 * reserve memory for malloc() arena
	 */
	addr_sp = addr - TOTAL_MALLOC_LEN;
	debug("Reserving %dk for malloc() at: %08lx\n",
	      TOTAL_MALLOC_LEN >> 10, addr_sp);

	/*
	 * (permanently) allocate a Board Info struct
	 * and a permanent copy of the "global" data
	 */
	addr_sp -= sizeof(bd_t);
	bd = (bd_t *) addr_sp;
	memset(bd, 0, sizeof(bd_t));
	gd->bd = bd;
	debug("Reserving %zu Bytes for Board Info at: %08lx\n",
	      sizeof(bd_t), addr_sp);
	addr_sp -= sizeof(gd_t);
	id = (gd_t *) addr_sp;
	debug("Reserving %zu Bytes for Global Data at: %08lx\n",
	      sizeof(gd_t), addr_sp);

	/*
	 * Finally, we set up a new (bigger) stack.
	 *
	 * Leave some safety gap for SP, force alignment on 16 byte boundary
	 * Clear initial stack frame
	 */
	addr_sp -= 16;
	addr_sp &= ~0xF;
	s = (ulong *) addr_sp;
	*s = 0; /* Terminate back chain */
	*++s = 0; /* NULL return address */
	debug("Stack Pointer at: %08lx\n", addr_sp);

	/*
	 * Save local variables to board info struct
	 */

	bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;	/* start of memory */
	bd->bi_memsize = gd->ram_size;			/* size in bytes */

#ifdef CONFIG_SYS_SRAM_BASE
	bd->bi_sramstart = CONFIG_SYS_SRAM_BASE;	/* start of SRAM */
	bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;		/* size  of SRAM */
#endif

#if defined(CONFIG_8xx) || defined(CONFIG_MPC8260) || defined(CONFIG_5xx) || \
    defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
	bd->bi_immr_base = CONFIG_SYS_IMMR;	/* base  of IMMR register     */
#endif
#if defined(CONFIG_MPC5xxx)
	bd->bi_mbar_base = CONFIG_SYS_MBAR;	/* base of internal registers */
#endif
#if defined(CONFIG_MPC83xx)
	bd->bi_immrbar = CONFIG_SYS_IMMR;
#endif

	WATCHDOG_RESET();
	bd->bi_intfreq = gd->cpu_clk;	/* Internal Freq, in Hz */
	bd->bi_busfreq = gd->bus_clk;	/* Bus Freq,      in Hz */
#if defined(CONFIG_CPM2)
	bd->bi_cpmfreq = gd->arch.cpm_clk;
	bd->bi_brgfreq = gd->arch.brg_clk;
	bd->bi_sccfreq = gd->arch.scc_clk;
	bd->bi_vco = gd->arch.vco_out;
#endif /* CONFIG_CPM2 */
#if defined(CONFIG_MPC512X)
	bd->bi_ipsfreq = gd->arch.ips_clk;
#endif /* CONFIG_MPC512X */
#if defined(CONFIG_MPC5xxx)
	bd->bi_ipbfreq = gd->arch.ipb_clk;
	bd->bi_pcifreq = gd->pci_clk;
#endif /* CONFIG_MPC5xxx */

#ifdef CONFIG_SYS_EXTBDINFO
	strncpy((char *) bd->bi_s_version, "1.2", sizeof(bd->bi_s_version));
	strncpy((char *) bd->bi_r_version, U_BOOT_VERSION,
		sizeof(bd->bi_r_version));

	bd->bi_procfreq = gd->cpu_clk;	/* Processor Speed, In Hz */
	bd->bi_plb_busfreq = gd->bus_clk;
#if defined(CONFIG_405GP) || defined(CONFIG_405EP) || \
    defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
	bd->bi_pci_busfreq = get_PCI_freq();
	bd->bi_opbfreq = get_OPB_freq();
#elif defined(CONFIG_XILINX_405)
	bd->bi_pci_busfreq = get_PCI_freq();
#endif
#endif

	debug("New Stack Pointer is: %08lx\n", addr_sp);

	WATCHDOG_RESET();

	gd->relocaddr = addr;	/* Store relocation addr, useful for debug */

	memcpy(id, (void *) gd, sizeof(gd_t));

	relocate_code(addr_sp, id, addr);

	/* NOTREACHED - relocate_code() does not return */
}

/*
 * 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)
{
	bd_t *bd;
	ulong malloc_start;

#ifndef CONFIG_SYS_NO_FLASH
	ulong flash_size;
#endif

	gd = id;		/* initialize RAM version of global data */
	bd = gd->bd;

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

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

#if defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx)
	/*
	 * The gd->arch.cpu pointer is set to an address in flash before
	 * relocation.  We need to update it to point to the same CPU entry
	 * in RAM.
	 */
	gd->arch.cpu += dest_addr - CONFIG_SYS_MONITOR_BASE;

	/*
	 * If we didn't know the cpu mask & # cores, we can save them of
	 * now rather than 'computing' them constantly
	 */
	fixup_cpu();
#endif

#ifdef CONFIG_SYS_EXTRA_ENV_RELOC
	/*
	 * Some systems need to relocate the env_addr pointer early because the
	 * location it points to will get invalidated before env_relocate is
	 * called.  One example is on systems that might use a L2 or L3 cache
	 * in SRAM mode and initialize that cache from SRAM mode back to being
	 * a cache in cpu_init_r.
	 */
	gd->env_addr += dest_addr - CONFIG_SYS_MONITOR_BASE;
#endif

	serial_initialize();

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

	WATCHDOG_RESET();

	/*
	 * Setup trap handlers
	 */
	trap_init(dest_addr);

#ifdef CONFIG_ADDR_MAP
	init_addr_map();
#endif

#if defined(CONFIG_BOARD_EARLY_INIT_R)
	board_early_init_r();
#endif

	monitor_flash_len = (ulong)&__init_end - dest_addr;

	WATCHDOG_RESET();

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

	WATCHDOG_RESET();

#if defined(CONFIG_SYS_DELAYED_ICACHE)
	icache_enable();	/* it's time to enable the instruction cache */
#endif

#if defined(CONFIG_SYS_INIT_RAM_LOCK) && defined(CONFIG_E500)
	unlock_ram_in_cache();	/* it's time to unlock D-cache in e500 */
#endif

#if defined(CONFIG_PCI) && defined(CONFIG_SYS_EARLY_PCI_INIT)
	/*
	 * Do early PCI configuration _before_ the flash gets initialised,
	 * because PCU ressources are crucial for flash access on some boards.
	 */
	pci_init();
#endif
#if defined(CONFIG_WINBOND_83C553)
	/*
	 * Initialise the ISA bridge
	 */
	initialise_w83c553f();
#endif

	asm("sync ; isync");

	mem_malloc_init(malloc_start, TOTAL_MALLOC_LEN);

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

	if (board_flash_wp_on()) {
		printf("Uninitialized - Write Protect On\n");
		/* Since WP is on, we can't find real size.  Set to 0 */
		flash_size = 0;
	} else if ((flash_size = flash_init()) > 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();
	}

	/* update start of FLASH memory    */
	bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
	/* size of FLASH memory (final value) */
	bd->bi_flashsize = flash_size;

#if defined(CONFIG_SYS_UPDATE_FLASH_SIZE)
	/* Make a update of the Memctrl. */
	update_flash_size(flash_size);
#endif


#if defined(CONFIG_OXC) || defined(CONFIG_RMU)
	/* flash mapped at end of memory map */
	bd->bi_flashoffset = CONFIG_SYS_TEXT_BASE + flash_size;
#elif CONFIG_SYS_MONITOR_BASE == CONFIG_SYS_FLASH_BASE
	bd->bi_flashoffset = monitor_flash_len;	/* reserved area for monitor */
#endif
#endif /* !CONFIG_SYS_NO_FLASH */

	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 */
#endif /* CONFIG_SYS_EXTBDINFO */

#if defined(CONFIG_SC3)
	sc3_read_eeprom();
#endif

#if defined(CONFIG_ID_EEPROM) || defined(CONFIG_SYS_I2C_MAC_OFFSET)
	mac_read_from_eeprom();
#endif

#ifdef	CONFIG_HERMES
	if ((gd->board_type >> 16) == 2)
		bd->bi_ethspeed = gd->board_type & 0xFFFF;
	else
		bd->bi_ethspeed = 0xFFFF;
#endif

#ifdef CONFIG_CMD_NET
	/* kept around for legacy kernels only ... ignore the next section */
	eth_getenv_enetaddr("ethaddr", bd->bi_enetaddr);
#ifdef CONFIG_HAS_ETH1
	eth_getenv_enetaddr("eth1addr", bd->bi_enet1addr);
#endif
#ifdef CONFIG_HAS_ETH2
	eth_getenv_enetaddr("eth2addr", bd->bi_enet2addr);
#endif
#ifdef CONFIG_HAS_ETH3
	eth_getenv_enetaddr("eth3addr", bd->bi_enet3addr);
#endif
#ifdef CONFIG_HAS_ETH4
	eth_getenv_enetaddr("eth4addr", bd->bi_enet4addr);
#endif
#ifdef CONFIG_HAS_ETH5
	eth_getenv_enetaddr("eth5addr", bd->bi_enet5addr);
#endif
#endif /* CONFIG_CMD_NET */

	WATCHDOG_RESET();

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

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

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

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

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

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

#ifdef	CONFIG_HERMES
	if (bd->bi_ethspeed != 0xFFFF)
		hermes_start_lxt980((int) bd->bi_ethspeed);
#endif

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

	debug("U-Boot relocated to %08lx\n", dest_addr);

	/*
	 * Enable Interrupts
	 */
	interrupt_init();

#if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
	status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
#endif

	udelay(20);

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

	WATCHDOG_RESET();

#if defined(CONFIG_CMD_SCSI)
	WATCHDOG_RESET();
	puts("SCSI:  ");
	scsi_init();
#endif

#if defined(CONFIG_CMD_DOC)
	WATCHDOG_RESET();
	puts("DOC:   ");
	doc_init();
#endif

#ifdef CONFIG_BITBANGMII
	bb_miiphy_init();
#endif
#if defined(CONFIG_CMD_NET)
	WATCHDOG_RESET();
	puts("Net:   ");
	eth_initialize(bd);
#endif

#if defined(CONFIG_CMD_NET) && defined(CONFIG_RESET_PHY_R)
	WATCHDOG_RESET();
	debug("Reset Ethernet PHY\n");
	reset_phy();
#endif

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

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

#if defined(CONFIG_CMD_IDE)
	WATCHDOG_RESET();
#ifdef	CONFIG_IDE_8xx_PCCARD
	puts("PCMCIA:");
#else
	puts("IDE:   ");
#endif
#if defined(CONFIG_START_IDE)
	if (board_start_ide())
		ide_init();
#else
	ide_init();
#endif
#endif

#ifdef CONFIG_LAST_STAGE_INIT
	WATCHDOG_RESET();
	/*
	 * Some parts can be only initialized if all others (like
	 * Interrupts) are up and running (i.e. the PC-style ISA
	 * keyboard).
	 */
	last_stage_init();
#endif

#if defined(CONFIG_CMD_BEDBUG)
	WATCHDOG_RESET();
	bedbug_init();
#endif

#if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
	/*
	 * Export available size of memory for Linux,
	 * taking into account the protected RAM at top of memory
	 */
	{
		ulong pram = 0;
		char memsz[32];

#ifdef CONFIG_PRAM
		pram = getenv_ulong("pram", 10, CONFIG_PRAM);
#endif
#ifdef CONFIG_LOGBUFFER
#ifndef CONFIG_ALT_LB_ADDR
		/* Also take the logbuffer into account (pram is in kB) */
		pram += (LOGBUFF_LEN + LOGBUFF_OVERHEAD) / 1024;
#endif
#endif
		sprintf(memsz, "%ldk", (ulong) (bd->bi_memsize / 1024) - pram);
		setenv("mem", memsz);
	}
#endif

#ifdef CONFIG_PS2KBD
	puts("PS/2:  ");
	kbd_init();
#endif

	/* Initialization complete - start the monitor */

	/* main_loop() can return to retry autoboot, if so just run it again. */
	for (;;) {
		WATCHDOG_RESET();
		main_loop();
	}

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

#if 0	/* We could use plain global data, but the resulting code is bigger */
/*
 * Pointer to initial global data area
 *
 * Here we initialize it.
 */
#undef	XTRN_DECLARE_GLOBAL_DATA_PTR
#define XTRN_DECLARE_GLOBAL_DATA_PTR	/* empty = allocate here */
DECLARE_GLOBAL_DATA_PTR =
	(gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
#endif /* 0 */

/************************************************************************/