main.c

嵌入式linux下ARM4210板的bootloader

#include "types.h"
#include "bios.h"
#include "skbuff.h"
#include "eth.h"
#include "arp.h"
#include "ip.h"
#include "udp.h"
#include "console.h"
#include "utils.h"

int startup_mode;
int startup_param;

int net_handle(void)
{
	struct sk_buff *skb;
	struct ethhdr *eth_hdr;

	skb = alloc_skb(ETH_FRAME_LEN);

	if (eth_rcv(skb) != -1) {

		eth_hdr = (struct ethhdr *)(skb->data);
		skb_pull(skb, ETH_HLEN);

		if (ntohs(eth_hdr->h_proto) == ETH_P_ARP)
			arp_rcv_packet(skb);

		else if(ntohs(eth_hdr->h_proto) == ETH_P_IP)
		 	ip_rcv_packet(skb);
	}

	free_skb(skb);

	return 0;
}

int timeout_handle(void)
{
	static int timeout = 0;

	timeout++;
	if (timeout < 5000) return 0;

	timeout = 0;

	return 0;
}

int _main(unsigned long ip, unsigned long mode, unsigned long param)
{
	unsigned char eth_addr[ETH_ALEN];
	unsigned char *s = (unsigned char *)&ip;
	int timeout = 0;

	console_init();
	printf("Mini TFTP Server 1.0 (IP : %d.%d.%d.%d) - ", s[3], s[2], s[1], s[0]);

	startup_mode = mode;
	startup_param = param;

	switch (startup_mode) 
        {
	   case BOOT_LOAD_PROGRAM:
		printf("Load uClinux image(RAM)\r\n");
		printf("Command: tftpcmd %d.%d.%d.%d 69 put image.ram",s[3],s[2],s[1],s[0]);
		break;
	   case BOOT_UPDATE_FIRMWARE:
		printf("Update Firmware\r\n");
		break;
	   default:
		break;
	}

	eth_init();
	eth_get_addr(eth_addr);
	arp_init();
	ip_init(ip);
	udp_init();

	arp_add_entry(eth_addr, ip);

	while (1) 
        {

	     net_handle();
	     timeout_handle();
	     if (kbhit() && (getch() == KEY_ESC)) break;
	}
	
	return 0;
}