lib_i386/board.c - u-boot - Git at Google

 /*
  * (C) Copyright 2002
  * Daniel Engstr�m, Omicron Ceti AB, daniel@omicron.se
  *
  * (C) Copyright 2002
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  *
  * (C) Copyright 2002
  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Marius Groeger <mgroeger@sysgo.de>
  *
  * See file CREDITS for list of people who contributed to this
  * project.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */

 #include <common.h>
 #include <watchdog.h>
 #include <command.h>
 #include <stdio_dev.h>
 #include <timestamp.h>
 #include <version.h>
 #include <malloc.h>
 #include <net.h>
 #include <ide.h>
 #include <asm/u-boot-i386.h>
 #include <elf.h>

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

 DECLARE_GLOBAL_DATA_PTR;

 /* Exports from the Linker Script */
 extern ulong _i386boot_text_start;
 extern ulong _i386boot_rel_dyn_start;
 extern ulong _i386boot_rel_dyn_end;
 extern ulong _i386boot_bss_start;
 extern ulong _i386boot_bss_size;
 void ram_bootstrap (void *);
 const char version_string[] =
 	U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";

 /************************************************************************
  * Init Utilities							*
  ************************************************************************
  * Some of this code should be moved into the core functions,
  * or dropped completely,
  * but let's get it working (again) first...
  */
 static int init_baudrate (void)
 {
 	char tmp[64];	/* long enough for environment variables */
 	int i = getenv_r("baudrate", tmp, 64);

 	gd->baudrate = (i != 0)
 			? (int) simple_strtoul (tmp, NULL, 10)
 			: CONFIG_BAUDRATE;

 	return (0);
 }

 static int display_banner (void)
 {

 	printf ("\n\n%s\n\n", version_string);
 /*
 	printf ("U-Boot code: %08lX -> %08lX  data: %08lX -> %08lX\n"
 		"        BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
 		i386boot_start, i386boot_romdata_start-1,
 		i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
 		i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
 		i386boot_bss_start+i386boot_bss_size,
 		i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);

 */

 	return (0);
 }

 /*
  * WARNING: this code looks "cleaner" than the PowerPC version, but
  * has the disadvantage that you either get nothing, or everything.
  * On PowerPC, you might see "DRAM: " before the system hangs - which
  * gives a simple yet clear indication which part of the
  * initialization if failing.
  */
 static int display_dram_config (void)
 {
 	int i;

 	puts ("DRAM Configuration:\n");

 	for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
 		printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
 		print_size (gd->bd->bi_dram[i].size, "\n");
 	}

 	return (0);
 }

 static void display_flash_config (ulong size)
 {
 	puts ("Flash: ");
 	print_size (size, "\n");
 }

 /*
  * Breath some life into the board...
  *
  * Initialize an SMC for serial comms, and carry out some hardware
  * tests.
  *
  * The first part of initialization is running from Flash memory;
  * its main purpose is to initialize the RAM so that we
  * can relocate the monitor code to RAM.
  */


 /*
  * 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_fnc_t *init_sequence[] = {
 	serial_init,
 	cpu_init_r,		/* basic cpu dependent setup */
 	board_early_init_r,	/* basic board dependent setup */
 	dram_init,		/* configure available RAM banks */
 	interrupt_init,		/* set up exceptions */
 	timer_init,
 	env_init,		/* initialize environment */
 	init_baudrate,		/* initialze baudrate settings */
 	serial_init,		/* serial communications setup */
 	display_banner,
 	display_dram_config,

 	NULL,
 };

 gd_t *gd;

 /*
  * Load U-Boot into RAM, initialize BSS, perform relocation adjustments
  */
 void board_init_f (ulong stack_limit)
 {
 	void *text_start = &_i386boot_text_start;
 	void *u_boot_cmd_end = &__u_boot_cmd_end;
 	Elf32_Rel *rel_dyn_start = (Elf32_Rel *)&_i386boot_rel_dyn_start;
 	Elf32_Rel *rel_dyn_end = (Elf32_Rel *)&_i386boot_rel_dyn_end;
 	void *bss_start = &_i386boot_bss_start;
 	void *bss_size = &_i386boot_bss_size;

 	size_t uboot_size;
 	void *ram_start;
 	ulong rel_offset;
 	Elf32_Rel *re;

 	void (*start_func)(void *);

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

 	uboot_size = (size_t)u_boot_cmd_end - (size_t)text_start;
 	ram_start  = (void *)stack_limit - (uboot_size + (ulong)bss_size);
 	rel_offset = text_start - ram_start;
 	start_func = ram_bootstrap - rel_offset;

 	/* First stage CPU initialization */
 	if (cpu_init_f() != 0)
 		hang();

 	/* First stage Board initialization */
 	if (board_early_init_f() != 0)
 		hang();

 	/* Copy U-Boot into RAM */
 	memcpy(ram_start, text_start, (size_t)uboot_size);

 	/* Clear BSS */
 	memset(bss_start - rel_offset,	0, (size_t)bss_size);

 	/* Perform relocation adjustments */
 	for (re = rel_dyn_start; re < rel_dyn_end; re++)
 	{
 		if (re->r_offset >= TEXT_BASE)
 			if (*(ulong *)re->r_offset >= TEXT_BASE)
 				*(ulong *)(re->r_offset - rel_offset) -= (Elf32_Addr)rel_offset;
 	}

 	start_func(ram_start);

 	/* NOTREACHED - relocate_code() does not return */
 	while(1);
 }

 /*
  * All attempts to jump straight from board_init_f() to board_init_r()
  * have failed, hence this special 'bootstrap' function.
  */
 void ram_bootstrap (void *ram_start)
 {
 	static gd_t gd_data;

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

 	board_init_r(&gd_data, (ulong)ram_start);
 }

 void board_init_r(gd_t *id, ulong ram_start)
 {
 	char *s;
 	int i;
 	ulong size;
 	static bd_t bd_data;
 	init_fnc_t **init_fnc_ptr;

 	show_boot_progress(0x21);

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

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

 	gd->baudrate =  CONFIG_BAUDRATE;

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

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

 	for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
 		show_boot_progress(0xa130|i);

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

 	/* 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);


 	/* IP Address */
 	bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");

 #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);

 	/* Must happen after interrupts are initialized since
 	 * an irq handler gets installed
 	 */
 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
 	serial_buffered_init();
 #endif

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

 	udelay(20);

 	set_timer (0);

 	/* Initialize from environment */
 	if ((s = getenv ("loadaddr")) != NULL) {
 		load_addr = simple_strtoul (s, NULL, 16);
 	}
 #if defined(CONFIG_CMD_NET)
 	if ((s = getenv ("bootfile")) != NULL) {
 		copy_filename (BootFile, s, sizeof (BootFile));
 	}
 #endif

 	WATCHDOG_RESET();

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

 #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)
 #if defined(CONFIG_NET_MULTI)
 	WATCHDOG_RESET();
 	puts("Net:   ");
 #endif
 	eth_initialize(gd->bd);
 #endif

 #if ( defined(CONFIG_CMD_NET)) && (0)
 	WATCHDOG_RESET();
 # ifdef DEBUG
 	puts ("Reset Ethernet PHY\n");
 # endif
 	reset_phy();
 #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


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


 	show_boot_progress(0x29);

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

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

 void hang (void)
 {
 	puts ("### ERROR ### Please RESET the board ###\n");
 	for (;;);
 }

 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
 {
 	/*
 	 * TODO: Test this function - changed to fix compiler error.
 	 * Original code was:
 	 *   return (entry >> 1) (argc, argv);
 	 * with a comment about Nios function pointers are address >> 1
 	 */
 	return (entry) (argc, argv);
 }
	/*
	* (C) Copyright 2002
	* Daniel Engstr�m, Omicron Ceti AB, daniel@omicron.se
	*
	* (C) Copyright 2002
	* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
	*
	* (C) Copyright 2002
	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	* Marius Groeger <mgroeger@sysgo.de>
	*
	* See file CREDITS for list of people who contributed to this
	* project.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; either version 2 of
	* the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	* MA 02111-1307 USA
	*/

	#include <common.h>
	#include <watchdog.h>
	#include <command.h>
	#include <stdio_dev.h>
	#include <timestamp.h>
	#include <version.h>
	#include <malloc.h>
	#include <net.h>
	#include <ide.h>
	#include <asm/u-boot-i386.h>
	#include <elf.h>

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

	DECLARE_GLOBAL_DATA_PTR;

	/* Exports from the Linker Script */
	extern ulong _i386boot_text_start;
	extern ulong _i386boot_rel_dyn_start;
	extern ulong _i386boot_rel_dyn_end;
	extern ulong _i386boot_bss_start;
	extern ulong _i386boot_bss_size;
	void ram_bootstrap (void *);
	const char version_string[] =
	U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";

	/************************************************************************
	* Init Utilities *
	************************************************************************
	* Some of this code should be moved into the core functions,
	* or dropped completely,
	* but let's get it working (again) first...
	*/
	static int init_baudrate (void)
	{
	char tmp[64]; /* long enough for environment variables */
	int i = getenv_r("baudrate", tmp, 64);

	gd->baudrate = (i != 0)
	? (int) simple_strtoul (tmp, NULL, 10)
	: CONFIG_BAUDRATE;

	return (0);
	}

	static int display_banner (void)
	{

	printf ("\n\n%s\n\n", version_string);
	/*
	printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
	" BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
	i386boot_start, i386boot_romdata_start-1,
	i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
	i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
	i386boot_bss_start+i386boot_bss_size,
	i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);

	*/

	return (0);
	}

	/*
	* WARNING: this code looks "cleaner" than the PowerPC version, but
	* has the disadvantage that you either get nothing, or everything.
	* On PowerPC, you might see "DRAM: " before the system hangs - which
	* gives a simple yet clear indication which part of the
	* initialization if failing.
	*/
	static int display_dram_config (void)
	{
	int i;

	puts ("DRAM Configuration:\n");

	for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
	printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
	print_size (gd->bd->bi_dram[i].size, "\n");
	}

	return (0);
	}

	static void display_flash_config (ulong size)
	{
	puts ("Flash: ");
	print_size (size, "\n");
	}

	/*
	* Breath some life into the board...
	*
	* Initialize an SMC for serial comms, and carry out some hardware
	* tests.
	*
	* The first part of initialization is running from Flash memory;
	* its main purpose is to initialize the RAM so that we
	* can relocate the monitor code to RAM.
	*/


	/*
	* 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_fnc_t *init_sequence[] = {
	serial_init,
	cpu_init_r, /* basic cpu dependent setup */
	board_early_init_r, /* basic board dependent setup */
	dram_init, /* configure available RAM banks */
	interrupt_init, /* set up exceptions */
	timer_init,
	env_init, /* initialize environment */
	init_baudrate, /* initialze baudrate settings */
	serial_init, /* serial communications setup */
	display_banner,
	display_dram_config,

	NULL,
	};

	gd_t *gd;

	/*
	* Load U-Boot into RAM, initialize BSS, perform relocation adjustments
	*/
	void board_init_f (ulong stack_limit)
	{
	void *text_start = &_i386boot_text_start;
	void *u_boot_cmd_end = &__u_boot_cmd_end;
	Elf32_Rel rel_dyn_start = (Elf32_Rel )&_i386boot_rel_dyn_start;
	Elf32_Rel rel_dyn_end = (Elf32_Rel )&_i386boot_rel_dyn_end;
	void *bss_start = &_i386boot_bss_start;
	void *bss_size = &_i386boot_bss_size;

	size_t uboot_size;
	void *ram_start;
	ulong rel_offset;
	Elf32_Rel *re;

	void (start_func)(void );

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

	uboot_size = (size_t)u_boot_cmd_end - (size_t)text_start;
	ram_start = (void *)stack_limit - (uboot_size + (ulong)bss_size);
	rel_offset = text_start - ram_start;
	start_func = ram_bootstrap - rel_offset;

	/* First stage CPU initialization */
	if (cpu_init_f() != 0)
	hang();

	/* First stage Board initialization */
	if (board_early_init_f() != 0)
	hang();

	/* Copy U-Boot into RAM */
	memcpy(ram_start, text_start, (size_t)uboot_size);

	/* Clear BSS */
	memset(bss_start - rel_offset, 0, (size_t)bss_size);

	/* Perform relocation adjustments */
	for (re = rel_dyn_start; re < rel_dyn_end; re++)
	{
	if (re->r_offset >= TEXT_BASE)
	if ((ulong )re->r_offset >= TEXT_BASE)
	(ulong )(re->r_offset - rel_offset) -= (Elf32_Addr)rel_offset;
	}

	start_func(ram_start);

	/* NOTREACHED - relocate_code() does not return */
	while(1);
	}

	/*
	* All attempts to jump straight from board_init_f() to board_init_r()
	* have failed, hence this special 'bootstrap' function.
	*/
	void ram_bootstrap (void *ram_start)
	{
	static gd_t gd_data;

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

	board_init_r(&gd_data, (ulong)ram_start);
	}

	void board_init_r(gd_t *id, ulong ram_start)
	{
	char *s;
	int i;
	ulong size;
	static bd_t bd_data;
	init_fnc_t **init_fnc_ptr;

	show_boot_progress(0x21);

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

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

	gd->baudrate = CONFIG_BAUDRATE;

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

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

	for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
	show_boot_progress(0xa130\|i);

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

	/* 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);


	/* IP Address */
	bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");

	#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);

	/* Must happen after interrupts are initialized since
	* an irq handler gets installed
	*/
	#ifdef CONFIG_SERIAL_SOFTWARE_FIFO
	serial_buffered_init();
	#endif

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

	udelay(20);

	set_timer (0);

	/* Initialize from environment */
	if ((s = getenv ("loadaddr")) != NULL) {
	load_addr = simple_strtoul (s, NULL, 16);
	}
	#if defined(CONFIG_CMD_NET)
	if ((s = getenv ("bootfile")) != NULL) {
	copy_filename (BootFile, s, sizeof (BootFile));
	}
	#endif

	WATCHDOG_RESET();

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

	#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)
	#if defined(CONFIG_NET_MULTI)
	WATCHDOG_RESET();
	puts("Net: ");
	#endif
	eth_initialize(gd->bd);
	#endif

	#if ( defined(CONFIG_CMD_NET)) && (0)
	WATCHDOG_RESET();
	# ifdef DEBUG
	puts ("Reset Ethernet PHY\n");
	# endif
	reset_phy();
	#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


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


	show_boot_progress(0x29);

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

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

	void hang (void)
	{
	puts ("### ERROR ### Please RESET the board ###\n");
	for (;;);
	}

	unsigned long do_go_exec (ulong (entry)(int, char []), int argc, char *argv[])
	{
	/*
	* TODO: Test this function - changed to fix compiler error.
	* Original code was:
	* return (entry >> 1) (argc, argv);
	* with a comment about Nios function pointers are address >> 1
	*/
	return (entry) (argc, argv);
	}