Subversion Repositories openrisc

#include "common.h"
#include "support.h"
#include "flash.h"
#include "net.h"
#include "eth.h"
#include "uart.h"
#include "dosfs.h"
#include "spr-defs.h"
 
#ifndef MAX_IMAGES
#define MAX_IMAGES 20
#endif
 
// Put the copyboot program at just before end of memory
#define COPYBOOT_LOCATION (SDRAM_SIZE - (32*4))
 
 
extern unsigned long fprog_addr;
extern char *tftp_filename;
 
static flash_cfg_struct gcfg =
    { BOARD_DEF_IP, BOARD_DEF_MASK, BOARD_DEF_GW, BOARD_DEF_TBOOT_SRVR };
 
// Not booting from flash, so just set these from board.h -- jb
//static flash_cfg_struct __attribute__ ((section(".config"))) gcfg = { BOARD_DEF_IP, BOARD_DEF_MASK, BOARD_DEF_GW,  BOARD_DEF_TBOOT_SRVR };
//static flash_cfg_struct __attribute__ ((section(".config"))) gcfg = { 0, 0, 0, 0 };
 
#define FLASH_IMAGES_BASE 0xf0300000
 
#define ALIGN(addr,size) ((addr + (size-1))&(~(size-1)))
// If the image buffer is word aligned, then uncomment this, but it was set up 
// so that the tftp images would download quicker
#define COPY_AND_BOOT_WORD_ALIGNED
#ifdef COPY_AND_BOOT_WORD_ALIGNED
void copy_and_boot(unsigned long src,
		   unsigned long dst, unsigned long len, int tx_next)
{
	__asm__ __volatile__("   ;\
        l.addi  r8,r0,0x1  ;\
        l.mtspr r0,r8,0x11  ;\
        l.nop               ;\
        l.nop               ;\
        l.nop               ;\
        l.nop               ;\
        l.nop               ;\
2:                          ;\
        l.sfgeu r4,r5       ;\
        l.bf    1f          ;\
        l.nop               ;\
        l.lwz   r8,0(r3)    ;\
        l.sw    0(r4),r8    ;\
        l.addi  r3,r3,4     ;\
        l.j     2b          ;\
        l.addi  r4,r4,4     ;\
1:      l.sw    0x0(r0),r6  ;\
        l.ori   r8,r0,0x100 ;\
        l.jr    r8          ;\
        l.nop");
}
#else
void copy_and_boot(unsigned long src,
		   unsigned long dst, unsigned long len, int tx_next)
{
	__asm__ __volatile__("   ;\
        l.addi  r8,r0,0x1  ;\
        l.mtspr r0,r8,0x11  ;\
        l.nop               ;\
        l.nop               ;\
        l.nop               ;\
        l.nop               ;\
        l.nop               ;\
2:                          ;\
        l.sfgeu r4,r5       ;\
        l.bf    1f          ;\
        l.nop               ;\
        l.lbz   r8,0(r3)    ;\
        l.sb    0(r4),r8    ;\
        l.addi  r3,r3,1     ;\
        l.j     2b          ;\
        l.addi  r4,r4,1     ;\
1:      l.sw    0x0(r0),r6  ;\
        l.ori   r8,r0,0x100 ;\
        l.jr    r8          ;\
        l.nop");
}
#endif
/* WARNING: stack and non-const globals should not be used in this function 
   -- it may corrupt what have we loaded;
   start_addr should be 0xffffffff if only copying should be made
   no return, when start_addr != 0xffffffff, if successful */
int copy_memory_run(register unsigned long src_addr,
		    register unsigned long dst_addr,
		    register unsigned long length,
		    register int erase, register unsigned long start_addr)
{
#ifdef FLASH_BASE_ADDR
	unsigned long i, flags;
 
	register char *dst = (char *)dst_addr;
	register const char *src = (const char *)src_addr;
 
	if (dst_addr >= FLASH_BASE_ADDR) {
		if (dst_addr + length >= FLASH_BASE_ADDR + FLASH_SIZE) {
			printf("error: region does not fit into flash.\n");
			return 1;
		}
#ifndef CFG_IN_FLASH
		fl_program(src_addr, dst_addr, length, erase,
			   1 /* do verify */ );
#else
		/* we must disable interrupts! */
		flags = mfspr(SPR_SR);
		mtspr(SPR_SR, flags & ~(SPR_SR_TEE | SPR_SR_IEE));
 
		printf("Unlocking flash... ");
		for (i = 0; i < length; i += FLASH_BLOCK_SIZE)
			fl_ext_unlock(dst_addr + i);
		printf("done\n");
 
		printf("Erasing flash... ");
		for (i = 0; i < length; i += FLASH_BLOCK_SIZE)
			fl_ext_erase(dst_addr + i);
		printf("done\n");
 
		printf("Programing flash:\n\t");
		for (i = 0; i < length; i += INC_ADDR) {
			if (((i + INC_ADDR) % 1000) == 0)
				printf("#");
			if ((i % (65 * 1000)) == 0)
				printf("\n\t");
			if (fl_ext_program
			    (dst_addr + i, reg_read(src_addr + i))) {
				printf("error programing at 0x%08lx!\n",
				       dst_addr + i);
				return 1;
			}
		}
		printf("Verifying flash... ");
		for (i = 0; i < length; i += INC_ADDR) {
			if (reg_read(dst_addr + i) != reg_read(src_addr + i)) {
				printf("error at %08lx: %08lx != %08lx\n",
				       src_addr + i, reg_read(src_addr + i),
				       reg_read(dst_addr + i));
				return 1;
			}
		}
		printf("OK!\n");
		mtspr(SPR_SR, flags);
#endif
		if (start_addr == 0xffffffff)
			return 0;
	} else {
		while (length--)
			*dst++ = *src++;
		if (start_addr == 0xffffffff)
			return 0;
	}
	/* Run the program */
	((void (*)(void))start_addr) ();
	return 0;		/* just to satisfy the cc */
#else
	return -1;
#endif
}
 
void bf_jump(unsigned long addr)
{
	asm("l.jr   r3");
	asm("l.nop  0x0");
}
 
int boot_flash_cmd(int argc, char *argv[])
{
#ifdef FLASH_BASE_ADDR
	unsigned long addr, val, jaddr;
	addr = 17;
	val = 0;
	/* clear SR */
 
asm("l.mtspr %0,%1,0": :"r"(addr), "r"(val));
	/* jump */
	if (argc == 0)
		bf_jump(FLASH_BASE_ADDR + 0x100);
	else {
		jaddr = strtoul(argv[0], 0, 0);
		bf_jump(jaddr);
	}
#endif
	return 0;
}
 
void init_load(void)
{
	global.ip = BOARD_DEF_IP;
	global.gw_ip = BOARD_DEF_GW;
	global.mask = BOARD_DEF_MASK;
	global.srv_ip = BOARD_DEF_TBOOT_SRVR;
	global.src_addr = ((ETH_BUF_SPACE + ETH_DATA_BASE) + 8) & ~0x3;
	tftp_filename = BOARD_DEF_IMAGE_NAME;
 
}
 
int tftp_cmd(int argc, char *argv[])
{
	switch (argc) {
	case 0:
		tftp_filename = "boot.img";
		break;
	case 3:
		global.src_addr = strtoul(argv[2], 0, 0);
	case 2:
		global.srv_ip = parse_ip(argv[1]);
	case 1:
		tftp_filename = &argv[0][0];
		break;
	}
 
	NetLoop(TFTP);		// TFTP is enumerated value in net.h
 
	return 0;
}
 
int tftp_conf_cmd(int argc, char *argv[])
{
	switch (argc) {
	case 0:
		printf("Image filename: %s", tftp_filename);
		printf("\nSrc addr: 0x%lx", global.src_addr);
		printf("\nServer IP: %s", inet_ntoa(global.srv_ip));
		return 0;
	case 3:
		global.src_addr = strtoul(argv[2], 0, 0);
		global.srv_ip = inet_aton(argv[1]);
		tftp_filename = argv[0];
		tftp_filename[strlen(argv[0])] = '\0';
		break;
	case 2:
		global.srv_ip = inet_aton(argv[1]);
		tftp_filename = argv[0];
		break;
	case 1:
		tftp_filename = argv[0];
		break;
	}
	return 0;
}
 
void save_global_cfg(flash_cfg_struct cfg)
{
#ifdef FLASH_BASE_ADDR
	unsigned long dst = (unsigned long)&gcfg, src = (unsigned long)&cfg;
	unsigned long i, end, flags;
 
	end = (unsigned long)&cfg + sizeof(flash_cfg_struct);
 
	printf("Saving global cfg from 0x%lx (end: 0x%lx) to 0x%lx...", src,
	       end, dst);
 
	/* we must disable interrupts! */
	flags = mfspr(SPR_SR);
	mtspr(SPR_SR, flags & ~(SPR_SR_TEE | SPR_SR_IEE));
	/*  printf("Unlocking... "); */
	for (i = 0; (src + i <= end); i += FLASH_BLOCK_SIZE) {
		fl_ext_unlock(dst + i);
	}
	/*  printf("done\n"); */
	/*  printf("Erasing... "); */
	for (i = 0; (src + i <= end); i += FLASH_BLOCK_SIZE)
		fl_ext_erase(dst);
	/*  printf("done\n"); */
	/*  printf("Programing... "); */
	for (i = 0; (src + i <= end); i += INC_ADDR) {
		if (fl_ext_program(dst + i, reg_read(src + i))) {
			printf("Error ocurred while saving.\n");
			return;
		}
	}
	printf("done\n");
 
	/* and than enable it back */
	mtspr(SPR_SR, flags);
#endif
	return;
}
 
int save_conf_cmd(int argc, char *argv[])
{
	flash_cfg_struct newCfg;
 
	newCfg = gcfg;
 
	newCfg.eth_ip = global.ip;
	newCfg.eth_mask = global.mask;
	newCfg.eth_gw = global.gw_ip;
	newCfg.tftp_srv_ip = global.srv_ip;
	/*  memcpy(newCfg.tftp_filename, tftp_filename, strlen(tftp_filename)); */
 
	save_global_cfg(newCfg);
	return 0;
}
 
int copy_cmd(int argc, char *argv[])
{
	switch (argc) {
	case 3:
		global.src_addr = strtoul(argv[2], 0, 0);
	case 2:
		global.length = strtoul(argv[2], 0, 0);
	case 1:
		global.src_addr = strtoul(argv[2], 0, 0);
	case 0:
		return copy_memory_run(global.src_addr, global.dst_addr,
				       global.length, global.erase_method,
				       0xffffffff);
	}
	return -1;
}
 
void images_info(void)
{
	int i;
	printf("Number of images: 0x%lx\n", gcfg.img_number);
	for (i = 0; i < gcfg.img_number; i++)
		printf("%d. image size: 0x%lx (at 0x%08lx)\n", i + 1,
		       gcfg.img_length[i], gcfg.img_start_addr[i]);
}
 
/*
 * get_good_addr() 
 *
 * Here we try to find the most suitable place for our image. We search for
 * a hole between images, that is big enough (but as small as possible).
 *
 */
unsigned long get_good_addr(unsigned int size)
{
#ifdef FLASH_BASE_ADDR
	unsigned long start_addr[MAX_IMAGES], end_addr[MAX_IMAGES];
	unsigned long free[MAX_IMAGES], st_addr[MAX_IMAGES];
	unsigned long tmpval;
	unsigned int i = 0, j;
 
	flash_cfg_struct myCfg;
	myCfg = gcfg;
 
	/* we are full */
	if (gcfg.img_number == MAX_IMAGES)
		return 0xffffffff;
 
	if (gcfg.img_number == 0)
		return FLASH_IMAGES_BASE;
 
	for (i = 0; i < MAX_IMAGES; i++) {
		start_addr[i] = 0;
		end_addr[i] = 0;
		free[i] = 0;
		st_addr[i] = 0;
	}
 
	for (i = 0; i < myCfg.img_number; i++) {
		start_addr[i] = myCfg.img_start_addr[i];
		end_addr[i] =
		    ALIGN((myCfg.img_start_addr[i] + myCfg.img_length[i]),
			  FLASH_BLOCK_SIZE);
	}
	/*  printf("\n");
	   for(i = 0; i < myCfg.img_number; i++)
	   printf("start: 0x%08x, end: 0x%08x\n", start_addr[i], end_addr[i]);
	   printf("\n"); */
	/* bubble sorting by start_addr */
 
	for (j = myCfg.img_number - 1; j > 0; j--)
		for (i = 0; i < j; i++)
			if (start_addr[i] > start_addr[i + 1]) {
				tmpval = start_addr[i];
				start_addr[i] = start_addr[i + 1];
				start_addr[i + 1] = tmpval;
				tmpval = end_addr[i];
				end_addr[i] = end_addr[i + 1];
				end_addr[i + 1] = tmpval;
			}
 
	/*  for(i = 0; i < myCfg.img_number; i++) 
	   printf("start: 0x%08x, end: 0x%08x\n", start_addr[i], end_addr[i]);
	   printf("\n"); */
 
	/* now we calculate free space betwens segments */
	for (i = 1; i < myCfg.img_number; i++) {
		st_addr[i] = end_addr[i - 1];
		free[i] = start_addr[i] - end_addr[i - 1];
	}
 
	/* here we calcuta first position (starting with FLASH_IMAGES_BASE)... */
	st_addr[0] = FLASH_IMAGES_BASE + 0;
	free[0] = start_addr[0] - FLASH_IMAGES_BASE;
	/* ... and last one (ending with FLASH_IMAGES_BASE + FLASH_SIZE). */
	st_addr[myCfg.img_number] = end_addr[myCfg.img_number - 1];
	free[myCfg.img_number] = (FLASH_IMAGES_BASE + FLASH_SIZE) -
	    end_addr[myCfg.img_number - 1];
 
	/* yet another bubble sort by free (space) */
	for (j = myCfg.img_number; j > 0; j--)
		for (i = 0; i < j; i++)
			if (free[i] > free[i + 1]) {
				tmpval = free[i];
				free[i] = free[i + 1];
				free[i + 1] = tmpval;
				tmpval = st_addr[i];
				st_addr[i] = st_addr[i + 1];
				st_addr[i + 1] = tmpval;
			}
 
	/* now we pick the smallest but just big enough for our size */
	for (i = 0; i <= myCfg.img_number; i++)
		if (free[i] >= size)
			return st_addr[i];
 
	/* there is not enough space (in one segment) left */
	return 0;
#else
	return -1;
#endif
}
 
unsigned long prepare_img_data(unsigned int num, unsigned int size)
{
	int i;
	unsigned long addr = 0;
	flash_cfg_struct newCfg;
 
	newCfg = gcfg;
 
	if (newCfg.img_number >= MAX_IMAGES) {
		printf("Maximum images exceeded: %d\n", MAX_IMAGES);
		return 0xffffffff;
	}
 
	newCfg.img_number++;
 
	if ((num > newCfg.img_number) || (num == 0))
		num = newCfg.img_number;
 
	addr = get_good_addr(size);
	if (addr == 0x00) {
		printf
		    ("Can not find suitable place in flash. (None of free segments are big enough)\n");
		return 0xffffffff;
	}
 
	if (num < newCfg.img_number)
		for (i = newCfg.img_number - 1; i >= num; i--) {
			newCfg.img_length[i] = newCfg.img_length[i - 1];
			newCfg.img_start_addr[i] = newCfg.img_start_addr[i - 1];
		}
 
	newCfg.img_length[num - 1] = size;
	newCfg.img_start_addr[num - 1] = addr;
 
	save_global_cfg(newCfg);
	return addr;
}
 
int del_image_cmd(int argc, char *argv[])
{
	unsigned num, i;
	flash_cfg_struct newCfg = gcfg;
 
	newCfg.img_number = gcfg.img_number;
	for (i = 0; i < MAX_IMAGES; i++)
		newCfg.img_length[i] = gcfg.img_length[i];
 
	printf("Number of images available: 0x%lx\n", newCfg.img_number);
 
	if (argc == 0) {
		newCfg.img_number = 0;
		for (i = 0; i < MAX_IMAGES; i++) {
			newCfg.img_length[i] = 0;
			newCfg.img_start_addr[i] = 0;
		}
		save_global_cfg(newCfg);
		return 0;
	} else {
		num = strtoul(argv[0], 0, 0);
	}
 
	if (newCfg.img_number == 0) {
		printf("Nothing to delete!\n");
		return 0;
	}
	if ((num == 0) || (num > newCfg.img_number))
		num = newCfg.img_number;
 
	for (i = num - 1; i < newCfg.img_number; i++) {
		newCfg.img_length[i] = newCfg.img_length[i + 1];
		newCfg.img_start_addr[i] = newCfg.img_start_addr[i + 1];
	}
 
	newCfg.img_number--;
	save_global_cfg(newCfg);
	return 0;
}
 
int boot_cmd(int argc, char *argv[])
{
	int num;
	extern int tx_next;
 
	if (argc == 0) {
		images_info();
		return 0;
	}
 
	num = strtoul(argv[0], 0, 0);
	if (gcfg.img_number < num) {
		printf("There are only %lu images, you requested %d!\n",
		       gcfg.img_number, num);
		return -1;
	}
 
	printf("Copying image number %d from 0x%lx, size: 0x%lx...",
	       num, gcfg.img_start_addr[num - 1], gcfg.img_length[num - 1]);
 
	printf("booting...\n");
	copy_and_boot(gcfg.img_start_addr[num - 1], 0x0,
		      gcfg.img_length[num - 1], tx_next);
	return 0;
}
 
int mGetData(unsigned long);
 
#if 0				// Disable sboot - JB
int sboot_cmd(int argc, char *argv[])
{
	int copied;
	unsigned int num = 0xffffffff, addr = 0x0;
 
	switch (argc) {
	case 0:
		num = 0xffffffff;
		break;
	case 1:
		num = strtoul(argv[0], 0, 0);
		break;
	}
 
	copied = mGetData(global.src_addr);
	if (copied <= 0) {
		printf("sboot: error while getting the image!");
		return -1;
	}
	printf("image size: 0x%x\n", copied);
 
	if (num != 0xffffffff) {
		addr = prepare_img_data(num, copied);
		if (addr == 0xffffffff)
			printf("Image not written to flash!\n");
		else {
			printf
			    ("Copying image to flash, image number: %d, dst_addr: 0x%x\n",
			     num, addr);
			copy_memory_run(global.src_addr,
					gcfg.img_start_addr[num - 1], copied, 2,
					0xffffffff);
		}
	}
 
	return 0;
}
#endif
 
void relocate_code(void *destination, void *function, int length_words)
{
	// Just copy the function word at a time from one place to another
	int i;
	unsigned long *p1 = (unsigned long *)destination;
	unsigned long *p2 = (unsigned long *)function;
	for (i = 0; i < length_words; i++)
		p1[i] = p2[i];
}
 
// DC disable command in cpu.c
extern int dc_disable_cmd(int argc, char *argv[]);
 
int tboot_cmd(int argc, char *argv[])
{
	int copied;
	unsigned int num = 0xffffffff, addr = 0x0;
	extern int tx_next;
	// NetTxPacket wasn't getting cleared before we used it...
	NetTxPacket = 0;
	NetBootFileSize = 0;
 
	switch (argc) {
	case 0:
		num = 0xffffffff;
		break;
	case 1:
		printf("argv[0] %p\n", argv[0]);
		num = strtoul(argv[0], 0, 0);
		printf("num %d\n", num);
		break;
	}
 
	// Disable data cache if present
	if (mfspr(SPR_SR) & SPR_SR_DCE) {
		printf("Disabling data cache\n");
		dc_disable_cmd(0, 0);
	}
	// Kick off copy
	copied = NetLoop(TFTP);
	if (copied <= 0) {
		printf("tboot: error while getting the image '%s'",
		       tftp_filename);
		return -1;
	}
 
	if (global.src_addr > 0) {
		/* the point of no return */
		printf("tboot: copying 0x%lx -> 0x0, image size 0x%x...\n",
		       global.src_addr, copied);
	}
	// Disable timer: clear it all!
	mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_TEE);
	mtspr(SPR_TTMR, 0);
 
	printf("tboot: relocating copy loop to 0x%x ...\n",
	       (unsigned long)COPYBOOT_LOCATION);
	// Setup where we'll copy the relocation function to
	void (*relocated_function) (unsigned long, unsigned long, unsigned long,
				    int)
	    = (void *)COPYBOOT_LOCATION;
	// Now copy the function there, 32 words worth, increase this if needed...
	relocate_code((void *)COPYBOOT_LOCATION, copy_and_boot, 32);
	// Indicate we'll jump there...
	printf
	    ("tboot: Relocate (%d bytes from 0x%x to 0) and boot image, ...\n",
	     copied, (unsigned long)global.src_addr);
	// Now do the copy and boot
	(*relocated_function) (global.src_addr, 0x0, 0x0 + copied, tx_next);
 
	return 0;
}
 
int sdboot_cmd(int argc, char *argv[])
{
	VOLINFO vi;
	unsigned char *buf_ptr;
 
	unsigned char sector[SECTOR_SIZE], sector2[SECTOR_SIZE];
	FILEINFO fi;
	unsigned long int pstart, psize, i, fisz;
	unsigned char pactive, ptype;
	DIRINFO di;
	DIRENT de;
	unsigned long int cache;
 
	// Obtain pointer to first partition on first (only) unit
	// Disable data cache if present
	if (mfspr(SPR_SR) & SPR_SR_DCE) {
		printf("Disabling data cache\n");
		dc_disable_cmd(0, 0);
	}
 
	buf_ptr = global.src_addr;
 
	printf("SD-BOOT start \n");
	i = init_fat(&vi);
 
	printf("Volume label '%-11.11s'\n", vi.label);
	printf
	    ("%d sector/s per cluster, %d reserved sector/s, volume total %d sectors.\n",
	     vi.secperclus, vi.reservedsecs, vi.numsecs);
	printf
	    ("%d sectors per FAT, first FAT at sector #%d, root dir at #%d.\n",
	     vi.secperfat, vi.fat1, vi.rootdir);
	printf
	    ("(For FAT32, the root dir is a CLUSTER number, FAT12/16 it is a SECTOR number)\n");
	printf("%d root dir entries, data area commences at sector #%d.\n",
	       vi.rootentries, vi.dataarea);
	printf("%d clusters (%d bytes) in data area, filesystem IDd as ",
	       vi.numclusters, vi.numclusters * vi.secperclus * SECTOR_SIZE);
	if (vi.filesystem == FAT12)
		printf("FAT12.\n");
	else if (vi.filesystem == FAT16)
		printf("FAT16.\n");
	else if (vi.filesystem == FAT32)
		printf("FAT32.\n");
	else
		printf("[unknown]\n");
 
	if (DFS_OpenDir(&vi, "", &di)) {
		printf("Error opening root directory\n");
		return -1;
	}
 
	printf("Readback test\n");
	if (DFS_OpenFile(&vi, "vmlinux.bin", DFS_READ, sector, &fi)) {
		printf("error opening file\n");
 
		return -1;
	}
 
	printf("fi.filen %d, pointer adress:%d, data:%d \n", fi.filelen,
	       buf_ptr, *buf_ptr);
 
	DFS_ReadFile(&fi, sector, buf_ptr, &i, fi.filelen);
	printf("\n read complete %d bytes (expected %d) pointer %d\n", i,
	       fi.filelen, fi.pointer);
 
	if (global.src_addr > 0) {
		/* the point of no return */
		printf("tboot: copying 0x%lx -> 0x0, image size 0x%x...\n",
		       global.src_addr, i);
	}
 
	// Disable timer: clear it all!
	mtspr(SPR_SR, mfspr(SPR_SR) & ~SPR_SR_TEE);
	mtspr(SPR_TTMR, 0);
 
	printf("tboot: relocating copy loop to 0x%x ...\n",
	       (unsigned long)COPYBOOT_LOCATION);
	// Setup where we'll copy the relocation function to
	void (*relocated_function) (unsigned long, unsigned long, unsigned long,
				    int)
	    = (void *)COPYBOOT_LOCATION;
	// Now copy the function there, 32 words worth, increase this if needed...
	relocate_code((void *)COPYBOOT_LOCATION, copy_and_boot, 32);
	// Indicate we'll jump there...
	printf
	    ("tboot: Relocate (%d bytes from 0x%x to 0) and boot image, ...\n",
	     i, (unsigned long)global.src_addr);
	// Now do the copy and boot
	(*relocated_function) (global.src_addr, 0x0, 0x0 + i, 0);
 
	return 0;
 
}
 
void module_load_init(void)
{
 
	register_command("tftp_conf", "[ <file> [ <srv_ip> [ <src_addr>]]]",
			 "TFTP configuration", tftp_conf_cmd);
	register_command("tboot", "[<image number>]",
			 "Bootstrap image downloaded via tftp", tboot_cmd);
	register_command("sdboot", "[<image number>]",
			 "Read image from SD-CARD", sdboot_cmd);
#if 0
	register_command("tftp", "[<file> [<srv_ip> [<src_addr>]]]",
			 "TFTP download", tftp_cmd);
	register_command("copy", "[<dst_addr> [<src_addr [<length>]]]",
			 "Copy memory", copy_cmd);
	register_command("sboot", "[<image number>]",
			 "Bootstrap image downloaded via serial (Y/X modem)",
			 sboot_cmd);
	register_command("boot", "[<image number>]",
			 "Bootstrap image copied from flash.", boot_cmd);
	register_command("del_image", "[<image number>]", "Delete image",
			 del_image_cmd);
	register_command("save_conf", "",
			 "Save current configuration into flash",
			 save_conf_cmd);
	register_command("boot_flash", "[<start_addr>]",
			 "Boot image from <start_addr> (default from flash)",
			 boot_flash_cmd);
#endif
	init_load();
 
}