load_file.c

arm9的bootloader大家下载解压缩即可看到

#include "inc/command.h"
#include "inc/serial.h"
#include "inc/xmodem.h"
#include <string.h>

#define LOAD_TO_FLASH	1
#define LOAD_TO_RAM	2
#define UNKNOWN_MODEM		0
#define X_MODEM			1
#define Y_MODEM			2
#define Z_MODEM			3


static int 
modem_is(const char *mt)
{
	if (strncmp("x", mt, 1) == 0) {
		return X_MODEM;
	} else if (strncmp("y", mt, 1) == 0) {
		return Y_MODEM;
	} else if (strncmp("z", mt, 1) == 0) {
		return Z_MODEM;
	} else {
		return UNKNOWN_MODEM;
	}
}

 size_t 
download_file(char *buf, size_t size, int modem, char *name)
{
	switch (modem) {
		case X_MODEM:
//#ifdef CONFIG_SERIAL_XMODEM
			Uart_SendString("Ready for downloading using xmodem...\n");
			Uart_SendString("Waiting...\n");
			return xmodem_receive(buf, size);
//#else
//			Uart_SendString("Not support XMODEM protocol by this vivi\n");
//#endif
			break;
		case Y_MODEM:
#ifdef CONFIG_SERIAL_YMODEM
			Uart_SendString("Ready for downloading using ymodem...\n");
			Uart_SendString("Waiting...\n");
			return ymodem_receive(buf, size, name);
#else
			Uart_SendString("Not support YMODEM protocol by this vivi\n");
#endif
			break;
		case Z_MODEM:
			Uart_SendString("Not support zmodem yet.\n");
			break;
		default:
			Uart_SendString("Not support this modem\n");
			break;
	}
	return 0;
}

/*void command_load(int argc, const char **argv)
{
	char *buf = (char *)RAM_BASE;
	 
	unsigned long to;	// is declared to long-long type ? 
	size_t size;
	int modem = 0;
	int where_to = 0;
	int ret;
	size_t retlen;
	mtd_partition_t *dst_part;
	int flag;
	char file_name[255] = { 0, };

	//Parse arguments 
	switch (argc) {
	case 2:
		if (strncmp("help", argv[1], 4) == 0) {
			goto print_usage;
		} else {
			goto invalid_cmd;
		}
		break;
	case 4:
		dst_part = get_mtd_partition(argv[2]);
		if (dst_part == NULL) {
			printk("Could not found \"%s\" partition\n", argv[2]);
			return;
		}
		to = dst_part->offset;
		size = dst_part->size;
		flag = dst_part->flag;
		modem = modem_is(argv[3]);
		break;
	case 5:
		to = strtoul(argv[2], NULL, 0, &ret);
		if (ret) goto error_parse_arg;
		size = (size_t)strtoul(argv[3], NULL, 0, &ret);
		if (ret) goto error_parse_arg;
		modem = modem_is(argv[4]);
		flag = 0;
		break;
	default:
		goto invalid_cmd;
	}

	if (strncmp("flash", argv[1], 5) == 0) {
		where_to = LOAD_TO_FLASH;
	} else if (strncmp("ram", argv[1], 3) == 0) {
		where_to = LOAD_TO_RAM;
	} else {
		printk("invalid argument. 'flash' or 'ram' is available\n");
		return;
	}

	// if load to ram 
	if (where_to == LOAD_TO_RAM) {
		buf = (char *)to;
	}

	// download a file 
	retlen = download_file(buf, size, modem, file_name);

	// hacked by nandy. delay for serial output 
	{ int i = 0x10000; while (i > 0) i--; }

	if (retlen == 0) {
		printk("Failed downloading file\n");
		return;
	}

	printk("Downloaded file at 0x%08lx, size = %d bytes\n", buf, retlen);

	switch (where_to) {
	case LOAD_TO_FLASH:
		if (retlen > size) {
			printk("An image size is too large to write flash.
				wanted = 0x%08lx, loaded = 0x%08lx\n", size, retlen);
			return;
		}

		if (flag & MF_ISRAM) {
			printk("Ooops, actually this partition is ram. It's tweak...!\n");
			return -1;
		}

		ret = write_to_flash((loff_t)to, retlen, buf, flag);
		break;
	case LOAD_TO_RAM:
		break;
	}

	if (modem == Y_MODEM)
		check_md5sum(buf, retlen, file_name);

	return;

error_parse_arg:
	printk("Can't parsing argumets\n");
	return;
invalid_cmd:
	printk("invalid 'load' command: too few(many) arguments\n");
print_usage:
	printk("\nUsage:\n");
	printk("  load <flash|ram> [ <partname> | <addr> <size> ] <x|y|z>\n");
	return;
}

user_command_t load_cmd = {
	"load",
	command_load,
	NULL,
	"load {...}\t\t\t-- Load a file to RAM/Flash"
};*/