text: /*
   * Copyright (c) 2011 The Chromium OS Authors.
   *
   * (C) Copyright 2002-2006
   * 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
   */
  
  /*
   * This file was taken from ARM and changed to remove things we don't
   * need. This is most of it, so have tried to avoid being over-zealous!
   * For example, we want to have an emulation of the 'DRAM' used by
   * U-Boot.
   *
   * has been talk upstream of unifying the architectures w.r.t board.c,
   * so the less change here the better.
   */
  
  #include <common.h>
  #include <command.h>
  #include <malloc.h>
  #include <stdio_dev.h>
  #include <timestamp.h>
  #include <version.h>
  #include <serial.h>
  
  #include <os.h>
  
  DECLARE_GLOBAL_DATA_PTR;
  
  static gd_t gd_mem;
  
  /************************************************************************
   * 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 display_banner(void)
  {
  	display_options();
  
  	return 0;
  }
  
  /**
   * Configure and report on the DRAM configuration, which in our case is
   * fairly simple.
   */
  static int display_dram_config(void)
  {
  	ulong size = 0;
  	int i;
  
  	debug("RAM Configuration:\n");
  
  	for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
  #ifdef DEBUG
  		printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
  		print_size(gd->bd->bi_dram[i].size, "\n");
  #endif
  		size += gd->bd->bi_dram[i].size;
  	}
  	puts("DRAM:  ");
  	print_size(size, "\n");
  	return 0;
  }
  
  /*
   * Breathe some life into the board...
   *
   * Initialize a serial port as console, 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 dependent #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);
  
  void __dram_init_banksize(void)
  {
  	gd->bd->bi_dram[0].start = 0;
  	gd->bd->bi_dram[0].size =  gd->ram_size;
  }
  
  void dram_init_banksize(void)
  	__attribute__((weak, alias("__dram_init_banksize")));
  
  init_fnc_t *init_sequence[] = {
  #if defined(CONFIG_ARCH_CPU_INIT)
  	arch_cpu_init,		/* basic arch cpu dependent setup */
  #endif
  #if defined(CONFIG_BOARD_EARLY_INIT_F)
  	board_early_init_f,
  #endif
  	timer_init,		/* initialize timer */
  	env_init,		/* initialize environment */
  	serial_init,		/* serial communications setup */
  	console_init_f,		/* stage 1 init of console */
  	display_banner,		/* say that we are here */
  #if defined(CONFIG_DISPLAY_CPUINFO)
  	print_cpuinfo,		/* display cpu info (and speed) */
  #endif
  #if defined(CONFIG_DISPLAY_BOARDINFO)
  	checkboard,		/* display board info */
  #endif
  	dram_init,		/* configure available RAM banks */
  	NULL,
  };
  
  void board_init_f(ulong bootflag)
  {
  	init_fnc_t **init_fnc_ptr;
  	uchar *mem;
  	unsigned long addr_sp, addr, size;
  
  	gd = &gd_mem;
  	assert(gd);
  
  	memset((void *)gd, 0, sizeof(gd_t));
  
  	for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
  		if ((*init_fnc_ptr)() != 0)
  			hang();
  	}
  
  	size = CONFIG_SYS_SDRAM_SIZE;
  	mem = os_malloc(CONFIG_SYS_SDRAM_SIZE);
  
  	assert(mem);
  	gd->ram_buf = mem;
  	addr = (ulong)(mem + size);
  
  	/*
  	 * 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);
  	gd->bd = (bd_t *) addr_sp;
  	debug("Reserving %zu Bytes for Board Info at: %08lx\n",
  			sizeof(bd_t), addr_sp);
  
  	/* Ram ist board specific, so move it to board code ... */
  	dram_init_banksize();
  	display_dram_config();	/* and display it */
  
  	/* We don't relocate, so just run the post-relocation code */
  	board_init_r(NULL, 0);
  
  	/* NOTREACHED - no way out of command loop except booting */
  }
  
  /************************************************************************
   *
   * 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)
  {
  
  	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
  
  	/*
  	 * 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 hang(void)
  {
  	puts("### ERROR ### Please RESET the board ###\n");
  	for (;;)
  		;
  }
  