main.c

来自「SMDK2440 boot code, base on vivi」· C语言 代码 · 共 211 行

/**
 * vivi/main.c: main routine
 *
 * Copyright (C) 2001-2004 MIZI Research, Inc. All Rights Reserved.
 *
 * Author:	Janghoon Lyu
 * Created:	October 3, 2003
 *
 * Last modified: $Date: 2004/03/30 04:09:48 $
 *                $Revision: 1.31 $
 *
 */

#include <config.h>
#include <machine.h>
#include <mmu.h>
#include <vmalloc.h>
#include <serial.h>
#include <command.h>
#include <getcmd.h>
#include <vstring.h>
#include <mtd/mtd.h>
#include <processor.h>
#include <reset_handle.h>
#include <types.h>
#include <button.h>
#include <fb_core.h>
#include <param.h>

/**
 * a wait delay for user to enter interactive mode.
 */
#define DEFAULT_BOOT_DELAY	0x30000000
	
extern char *vivi_banner;
extern char *vivi_ibanner;
extern void console_init(void);
#ifdef CONFIG_VIVI_FS
extern int vfs_init(void);
#endif

static void
hang(void)
{
	printk("System is hanged.\n");
	for (;;) ;
}

static void 
vivi_shell(void)
{
#ifdef CONFIG_SERIAL_TERM
	serial_term();
#else
#error there is no terminal.
#endif
}

static void run_autoboot(void)
{
	while (1) {
		exec_string("boot");
		printk("Failed 'boot' command. reentering vivi shell\n");
		/* if default boot fails, drop into the shell */
		vivi_shell();
	}
}

void boot_or_vivi(void)
{
	char c;
	int ret;
	ulong boot_delay;

	ret = get_param_ulong("boot_delay", &boot_delay);
	if (ret) boot_delay = DEFAULT_BOOT_DELAY;
	/* If a value of boot_delay is zero, 
	 * unconditionally call vivi shell */
	if (boot_delay == 0) vivi_shell();


	/*
	 * wait for a keystroke (or a button press if you want.)
	 */
	printk("Press Return to start the LINUX now, any other key for vivi\n");
	c = awaitkey(boot_delay, NULL);
	if (((c != '\r') && (c != '\n') && (c != '\0'))) {
		printk("\n\n%s", vivi_ibanner);
		printk("Enter 'help' for a list of built-in commands.\n\n");
		vivi_shell();
	}
	run_autoboot();

	return;
}


extern int init_irq(void);
extern void net_command_regist(void);
extern int mtd_part_init(void);
extern int mtd_dev_init(void);

/**
 * start-up functions for vivi
 */ 

/*
 * Don't disturb order.
 * Note: vivi always runs on the ram except head.S.
 */
static int start_vivi(void)
{
	/* Initialize UART for user interface */
	console_init();

	printk("\r\n");
	printk(vivi_banner);

	printk("initialize board...\n");
	if (board_init())
		return 1;


	/*
	 *   4G甫 府聪绢(linear)窍霸 概俏窍绊, 敲贰浆 皋葛府甫
	 *   盔窍绰 措肺 概俏窍绊,
	 *   MMU甫 难技夸.
	 */
	printk("initialize MMU...\n");
	mem_map_init(DEFAULT_BOOT_TYPE);
	mmu_init();

	/* 
	 * 何飘肺歹俊辑 悼利 皋葛府 且寸阑 荤侩且 荐 乐档废
	 * 林狼: 寸楷捞 捞 捞傈俊绰 vmalloc() 荤侩 阂啊
	 */
	/* initialize the heap area */
	printk("initialize memory...\n");
	vmalloc_init();

#ifdef CONFIG_MTD
	printk("initialize MTD device...\n");
	if (mtd_dev_init())
		return 1;
#endif
	
#ifdef CONFIG_VIVI_FS
	printk("initialzie simple vivi file system...\n");
	if (vfs_init())
		return 1;
#endif

#ifdef CONFIG_MTD_PARTITIONS
	printk("initialize MTD partitions...\n");
	if (mtd_part_init())
		return 1;
#endif

	printk("initialize vivi paramters...\n");
	if (init_param())
		return 1;


	init_builtin_cmds();

#ifdef CONFIG_CHECK_BUTTON
	check_buttons();
#endif

#ifdef CONFIG_FB
	fb_init();
#endif

#ifdef CONFIG_NET
	net_command_regist();	
#endif

#ifdef CONFIG_USE_IRQ
	if (init_irq()) {
		printk("failed intialize IRQ sub-system.\n");
	} else {
		printk("enabled IRQ sub-system.\n");
	}
#endif

	/* 林狼: 酒贰 滴 窃荐狼 困摹 官操瘤 富巴. 怖 历措肺 出笛 巴 */
	/*
	 * 扁鸥 固柳茄 老甸阑 秦林搁 瞪 巴 鞍促.
	 * 阿 敲阀汽 喊肺 漂捞茄 老甸阑.
	 */
	misc();

	return 0;
}

/**
 * \brief main function of vivi
 */

int main(int argc, char *argv[])
{
	if (start_vivi())
		hang();

	boot_or_vivi();

	/* 咯扁鳖瘤 坷搁 捞惑窍瘤夸. 弊犯瘤 臼唱夸? */
	hang();
	return 0;
}