move more nor flash implementation details

Splits the exec mode commands out of flash.c into the flash/nor/ files.
The routines used by these high-level commands are moved into nor/core.c,
with their internal declarations placed in nor/imp.h.

Fixes distribution of <flash/nor/core.h> header.

5 files changed, 1011 insertions, 999 deletions

diff --git a/src/flash/flash.c b/src/flash/flash.c
index b21838c..2cf56ed 100644
--- a/src/flash/flash.c
+++ b/src/flash/flash.c
@@ -32,8 +32,6 @@
 #include <target/image.h>
 #include <helper/time_support.h>
 
-static int flash_write_unlock(struct target *target, struct image *image, uint32_t *written, int erase, bool unlock);
-
 /* flash drivers
  */
 extern struct flash_driver lpc2000_flash;
@@ -79,47 +77,6 @@ struct flash_driver *flash_drivers[] = {
 
 struct flash_bank *flash_banks;
 
-/* wafer thin wrapper for invoking the flash driver */
-static int flash_driver_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
-{
-	int retval;
-
-	retval = bank->driver->write(bank, buffer, offset, count);
-	if (retval != ERROR_OK)
-	{
-		LOG_ERROR("error writing to flash at address 0x%08" PRIx32 " at offset 0x%8.8" PRIx32 " (%d)",
-			  bank->base, offset, retval);
-	}
-
-	return retval;
-}
-
-static int flash_driver_erase(struct flash_bank *bank, int first, int last)
-{
-	int retval;
-
-	retval = bank->driver->erase(bank, first, last);
-	if (retval != ERROR_OK)
-	{
-		LOG_ERROR("failed erasing sectors %d to %d (%d)", first, last, retval);
-	}
-
-	return retval;
-}
-
-int flash_driver_protect(struct flash_bank *bank, int set, int first, int last)
-{
-	int retval;
-
-	retval = bank->driver->protect(bank, set, first, last);
-	if (retval != ERROR_OK)
-	{
-		LOG_ERROR("failed setting protection for areas %d to %d (%d)", first, last, retval);
-	}
-
-	return retval;
-}
-
 struct flash_bank *get_flash_bank_by_num_noprobe(int num)
 {
 	struct flash_bank *p;
@@ -184,629 +141,6 @@ struct flash_bank *get_flash_bank_by_num(int num)
 	return p;
 }
 
-COMMAND_HELPER(flash_command_get_bank, unsigned name_index,
-		struct flash_bank **bank)
-{
-	const char *name = CMD_ARGV[name_index];
-	*bank = get_flash_bank_by_name(name);
-	if (*bank)
-		return ERROR_OK;
-
-	unsigned bank_num;
-	COMMAND_PARSE_NUMBER(uint, name, bank_num);
-
-	*bank = get_flash_bank_by_num(bank_num);
-	if (!*bank)
-	{
-		command_print(CMD_CTX, "flash bank '%s' not found", name);
-		return ERROR_INVALID_ARGUMENTS;
-	}
-	return ERROR_OK;
-}
-
-
-COMMAND_HANDLER(handle_flash_info_command)
-{
-	struct flash_bank *p;
-	uint32_t i = 0;
-	int j = 0;
-	int retval;
-
-	if (CMD_ARGC != 1)
-		return ERROR_COMMAND_SYNTAX_ERROR;
-
-	unsigned bank_nr;
-	COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], bank_nr);
-
-	for (p = flash_banks; p; p = p->next, i++)
-	{
-		if (i != bank_nr)
-			continue;
-
-		char buf[1024];
-
-		/* attempt auto probe */
-		if ((retval = p->driver->auto_probe(p)) != ERROR_OK)
-			return retval;
-
-		command_print(CMD_CTX,
-			      "#%" PRIi32 " : %s at 0x%8.8" PRIx32 ", size 0x%8.8" PRIx32 ", buswidth %i, chipwidth %i",
-			      i,
-			      p->driver->name,
-			      p->base,
-			      p->size,
-			      p->bus_width,
-			      p->chip_width);
-		for (j = 0; j < p->num_sectors; j++)
-		{
-			char *protect_state;
-
-			if (p->sectors[j].is_protected == 0)
-				protect_state = "not protected";
-			else if (p->sectors[j].is_protected == 1)
-				protect_state = "protected";
-			else
-				protect_state = "protection state unknown";
-
-			command_print(CMD_CTX,
-				      "\t#%3i: 0x%8.8" PRIx32 " (0x%" PRIx32 " %" PRIi32 "kB) %s",
-				      j,
-				      p->sectors[j].offset,
-				      p->sectors[j].size,
-				      p->sectors[j].size >> 10,
-				      protect_state);
-		}
-
-		*buf = '\0'; /* initialize buffer, otherwise it migh contain garbage if driver function fails */
-		retval = p->driver->info(p, buf, sizeof(buf));
-		command_print(CMD_CTX, "%s", buf);
-		if (retval != ERROR_OK)
-			LOG_ERROR("error retrieving flash info (%d)", retval);
-	}
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_flash_probe_command)
-{
-	int retval;
-
-	if (CMD_ARGC != 1)
-	{
-		return ERROR_COMMAND_SYNTAX_ERROR;
-	}
-
-	unsigned bank_nr;
-	COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], bank_nr);
-	struct flash_bank *p = get_flash_bank_by_num_noprobe(bank_nr);
-	if (p)
-	{
-		if ((retval = p->driver->probe(p)) == ERROR_OK)
-		{
-			command_print(CMD_CTX, "flash '%s' found at 0x%8.8" PRIx32, p->driver->name, p->base);
-		}
-		else if (retval == ERROR_FLASH_BANK_INVALID)
-		{
-			command_print(CMD_CTX, "probing failed for flash bank '#%s' at 0x%8.8" PRIx32,
-						  CMD_ARGV[0], p->base);
-		}
-		else
-		{
-			command_print(CMD_CTX, "unknown error when probing flash bank '#%s' at 0x%8.8" PRIx32,
-						  CMD_ARGV[0], p->base);
-		}
-	}
-	else
-	{
-		command_print(CMD_CTX, "flash bank '#%s' is out of bounds", CMD_ARGV[0]);
-	}
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_flash_erase_check_command)
-{
-	if (CMD_ARGC != 1)
-	{
-		return ERROR_COMMAND_SYNTAX_ERROR;
-	}
-
-	struct flash_bank *p;
-	int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
-	if (ERROR_OK != retval)
-		return retval;
-
-	int j;
-	if ((retval = p->driver->erase_check(p)) == ERROR_OK)
-	{
-		command_print(CMD_CTX, "successfully checked erase state");
-	}
-	else
-	{
-		command_print(CMD_CTX, "unknown error when checking erase state of flash bank #%s at 0x%8.8" PRIx32,
-			CMD_ARGV[0], p->base);
-	}
-
-	for (j = 0; j < p->num_sectors; j++)
-	{
-		char *erase_state;
-
-		if (p->sectors[j].is_erased == 0)
-			erase_state = "not erased";
-		else if (p->sectors[j].is_erased == 1)
-			erase_state = "erased";
-		else
-			erase_state = "erase state unknown";
-
-		command_print(CMD_CTX,
-			      "\t#%3i: 0x%8.8" PRIx32 " (0x%" PRIx32 " %" PRIi32 "kB) %s",
-			      j,
-			      p->sectors[j].offset,
-			      p->sectors[j].size,
-			      p->sectors[j].size >> 10,
-			      erase_state);
-	}
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_flash_erase_address_command)
-{
-	struct flash_bank *p;
-	int retval;
-	int address;
-	int length;
-
-	struct target *target = get_current_target(CMD_CTX);
-
-	if (CMD_ARGC != 2)
-		return ERROR_COMMAND_SYNTAX_ERROR;
-
-	COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], address);
-	COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], length);
-	if (length <= 0)
-	{
-		command_print(CMD_CTX, "Length must be >0");
-		return ERROR_COMMAND_SYNTAX_ERROR;
-	}
-
-	p = get_flash_bank_by_addr(target, address);
-	if (p == NULL)
-	{
-		return ERROR_FAIL;
-	}
-
-	/* We can't know if we did a resume + halt, in which case we no longer know the erased state */
-	flash_set_dirty();
-
-	struct duration bench;
-	duration_start(&bench);
-
-	retval = flash_erase_address_range(target, address, length);
-
-	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-	{
-		command_print(CMD_CTX, "erased address 0x%8.8x (length %i)"
-				" in %fs (%0.3f kb/s)", address, length,
-				duration_elapsed(&bench), duration_kbps(&bench, length));
-	}
-
-	return retval;
-}
-
-COMMAND_HANDLER(handle_flash_protect_check_command)
-{
-	if (CMD_ARGC != 1)
-		return ERROR_COMMAND_SYNTAX_ERROR;
-
-	struct flash_bank *p;
-	int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
-	if (ERROR_OK != retval)
-		return retval;
-
-	if ((retval = p->driver->protect_check(p)) == ERROR_OK)
-	{
-		command_print(CMD_CTX, "successfully checked protect state");
-	}
-	else if (retval == ERROR_FLASH_OPERATION_FAILED)
-	{
-		command_print(CMD_CTX, "checking protection state failed (possibly unsupported) by flash #%s at 0x%8.8" PRIx32, CMD_ARGV[0], p->base);
-	}
-	else
-	{
-		command_print(CMD_CTX, "unknown error when checking protection state of flash bank '#%s' at 0x%8.8" PRIx32, CMD_ARGV[0], p->base);
-	}
-
-	return ERROR_OK;
-}
-
-static int flash_check_sector_parameters(struct command_context *cmd_ctx,
-		uint32_t first, uint32_t last, uint32_t num_sectors)
-{
-	if (!(first <= last)) {
-		command_print(cmd_ctx, "ERROR: "
-				"first sector must be <= last sector");
-		return ERROR_FAIL;
-	}
-
-	if (!(last <= (num_sectors - 1))) {
-		command_print(cmd_ctx, "ERROR: last sector must be <= %d",
-				(int) num_sectors - 1);
-		return ERROR_FAIL;
-	}
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_flash_erase_command)
-{
-	if (CMD_ARGC != 3)
-		return ERROR_COMMAND_SYNTAX_ERROR;
-
-	uint32_t bank_nr;
-	uint32_t first;
-	uint32_t last;
-
-	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], bank_nr);
-	struct flash_bank *p = get_flash_bank_by_num(bank_nr);
-	if (!p)
-		return ERROR_OK;
-
-	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], first);
-	if (strcmp(CMD_ARGV[2], "last") == 0)
-		last = p->num_sectors - 1;
-	else
-		COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], last);
-
-	int retval;
-	if ((retval = flash_check_sector_parameters(CMD_CTX,
-			first, last, p->num_sectors)) != ERROR_OK)
-		return retval;
-
-	struct duration bench;
-	duration_start(&bench);
-
-	retval = flash_driver_erase(p, first, last);
-
-	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-	{
-		command_print(CMD_CTX, "erased sectors %" PRIu32 " "
-				"through %" PRIu32" on flash bank %" PRIu32 " "
-				"in %fs", first, last, bank_nr, duration_elapsed(&bench));
-	}
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_flash_protect_command)
-{
-	if (CMD_ARGC != 4)
-		return ERROR_COMMAND_SYNTAX_ERROR;
-
-	uint32_t bank_nr;
-	uint32_t first;
-	uint32_t last;
-
-	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], bank_nr);
-	struct flash_bank *p = get_flash_bank_by_num(bank_nr);
-	if (!p)
-		return ERROR_OK;
-
-	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], first);
-	if (strcmp(CMD_ARGV[2], "last") == 0)
-		last = p->num_sectors - 1;
-	else
-		COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], last);
-
-	bool set;
-	COMMAND_PARSE_ON_OFF(CMD_ARGV[3], set);
-
-	int retval;
-	if ((retval = flash_check_sector_parameters(CMD_CTX,
-			first, last, p->num_sectors)) != ERROR_OK)
-		return retval;
-
-	retval = flash_driver_protect(p, set, first, last);
-	if (retval == ERROR_OK) {
-		command_print(CMD_CTX, "%s protection for sectors %i "
-				"through %i on flash bank %i",
-			(set) ? "set" : "cleared", (int) first,
-			(int) last, (int) bank_nr);
-	}
-
-	return ERROR_OK;
-}
-
-COMMAND_HANDLER(handle_flash_write_image_command)
-{
-	struct target *target = get_current_target(CMD_CTX);
-
-	struct image image;
-	uint32_t written;
-
-	int retval;
-
-	if (CMD_ARGC < 1)
-	{
-		return ERROR_COMMAND_SYNTAX_ERROR;
-	}
-
-	/* flash auto-erase is disabled by default*/
-	int auto_erase = 0;
-	bool auto_unlock = false;
-
-	for (;;)
-	{
-		if (strcmp(CMD_ARGV[0], "erase") == 0)
-		{
-			auto_erase = 1;
-			CMD_ARGV++;
-			CMD_ARGC--;
-			command_print(CMD_CTX, "auto erase enabled");
-		} else if (strcmp(CMD_ARGV[0], "unlock") == 0)
-		{
-			auto_unlock = true;
-			CMD_ARGV++;
-			CMD_ARGC--;
-			command_print(CMD_CTX, "auto unlock enabled");
-		} else
-		{
-			break;
-		}
-	}
-
-	if (CMD_ARGC < 1)
-	{
-		return ERROR_COMMAND_SYNTAX_ERROR;
-	}
-
-	if (!target)
-	{
-		LOG_ERROR("no target selected");
-		return ERROR_FAIL;
-	}
-
-	struct duration bench;
-	duration_start(&bench);
-
-	if (CMD_ARGC >= 2)
-	{
-		image.base_address_set = 1;
-		COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], image.base_address);
-	}
-	else
-	{
-		image.base_address_set = 0;
-		image.base_address = 0x0;
-	}
-
-	image.start_address_set = 0;
-
-	retval = image_open(&image, CMD_ARGV[0], (CMD_ARGC == 3) ? CMD_ARGV[2] : NULL);
-	if (retval != ERROR_OK)
-	{
-		return retval;
-	}
-
-	retval = flash_write_unlock(target, &image, &written, auto_erase, auto_unlock);
-	if (retval != ERROR_OK)
-	{
-		image_close(&image);
-		return retval;
-	}
-
-	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-	{
-		command_print(CMD_CTX, "wrote %" PRIu32 " byte from file %s "
-				"in %fs (%0.3f kb/s)", written, CMD_ARGV[0],
-				duration_elapsed(&bench), duration_kbps(&bench, written));
-	}
-
-	image_close(&image);
-
-	return retval;
-}
-
-COMMAND_HANDLER(handle_flash_fill_command)
-{
-	int err = ERROR_OK;
-	uint32_t address;
-	uint32_t pattern;
-	uint32_t count;
-	uint32_t wrote = 0;
-	uint32_t cur_size = 0;
-	uint32_t chunk_count;
-	struct target *target = get_current_target(CMD_CTX);
-	uint32_t i;
-	uint32_t wordsize;
-	int retval = ERROR_OK;
-
-	static size_t const chunksize = 1024;
-	uint8_t *chunk = malloc(chunksize);
-	if (chunk == NULL)
-		return ERROR_FAIL;
-
-	uint8_t *readback = malloc(chunksize);
-	if (readback == NULL)
-	{
-		free(chunk);
-		return ERROR_FAIL;
-	}
-
-
-	if (CMD_ARGC != 3)
-	{
-		retval = ERROR_COMMAND_SYNTAX_ERROR;
-		goto done;
-	}
-
-
-	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
-	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], pattern);
-	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], count);
-
-	if (count == 0)
-		goto done;
-
-	switch (CMD_NAME[4])
-	{
-	case 'w':
-		wordsize = 4;
-		break;
-	case 'h':
-		wordsize = 2;
-		break;
-	case 'b':
-		wordsize = 1;
-		break;
-	default:
-		retval = ERROR_COMMAND_SYNTAX_ERROR;
-		goto done;
-	}
-
-	chunk_count = MIN(count, (chunksize / wordsize));
-	switch (wordsize)
-	{
-	case 4:
-		for (i = 0; i < chunk_count; i++)
-		{
-			target_buffer_set_u32(target, chunk + i * wordsize, pattern);
-		}
-		break;
-	case 2:
-		for (i = 0; i < chunk_count; i++)
-		{
-			target_buffer_set_u16(target, chunk + i * wordsize, pattern);
-		}
-		break;
-	case 1:
-		memset(chunk, pattern, chunk_count);
-		break;
-	default:
-		LOG_ERROR("BUG: can't happen");
-		exit(-1);
-	}
-
-	struct duration bench;
-	duration_start(&bench);
-
-	for (wrote = 0; wrote < (count*wordsize); wrote += cur_size)
-	{
-		cur_size = MIN((count*wordsize - wrote), sizeof(chunk));
-		struct flash_bank *bank;
-		bank = get_flash_bank_by_addr(target, address);
-		if (bank == NULL)
-		{
-			retval = ERROR_FAIL;
-			goto done;
-		}
-		err = flash_driver_write(bank, chunk, address - bank->base + wrote, cur_size);
-		if (err != ERROR_OK)
-		{
-			retval = err;
-			goto done;
-		}
-
-		err = target_read_buffer(target, address + wrote, cur_size, readback);
-		if (err != ERROR_OK)
-		{
-			retval = err;
-			goto done;
-		}
-
-		unsigned i;
-		for (i = 0; i < cur_size; i++)
-		{
-			if (readback[i]!=chunk[i])
-			{
-				LOG_ERROR("Verfication error address 0x%08" PRIx32 ", read back 0x%02x, expected 0x%02x",
-						  address + wrote + i, readback[i], chunk[i]);
-				retval = ERROR_FAIL;
-				goto done;
-			}
-		}
-	}
-
-	if (duration_measure(&bench) == ERROR_OK)
-	{
-		command_print(CMD_CTX, "wrote %" PRIu32 " bytes to 0x%8.8" PRIx32
-				" in %fs (%0.3f kb/s)", wrote, address,
-				duration_elapsed(&bench), duration_kbps(&bench, wrote));
-	}
-
-	done:
-	free(readback);
-	free(chunk);
-
-	return retval;
-}
-
-COMMAND_HANDLER(handle_flash_write_bank_command)
-{
-	uint32_t offset;
-	uint8_t *buffer;
-	struct fileio fileio;
-
-	if (CMD_ARGC != 3)
-		return ERROR_COMMAND_SYNTAX_ERROR;
-
-	struct duration bench;
-	duration_start(&bench);
-
-	struct flash_bank *p;
-	int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
-	if (ERROR_OK != retval)
-		return retval;
-
-	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], offset);
-
-	if (fileio_open(&fileio, CMD_ARGV[1], FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
-	{
-		return ERROR_OK;
-	}
-
-	buffer = malloc(fileio.size);
-	size_t buf_cnt;
-	if (fileio_read(&fileio, fileio.size, buffer, &buf_cnt) != ERROR_OK)
-	{
-		free(buffer);
-		fileio_close(&fileio);
-		return ERROR_OK;
-	}
-
-	retval = flash_driver_write(p, buffer, offset, buf_cnt);
-
-	free(buffer);
-	buffer = NULL;
-
-	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-	{
-		command_print(CMD_CTX, "wrote %zu byte from file %s to flash bank %u"
-				" at offset 0x%8.8" PRIx32 " in %fs (%0.3f kb/s)",
-				fileio.size, CMD_ARGV[1], p->bank_number, offset,
-				duration_elapsed(&bench), duration_kbps(&bench, fileio.size));
-	}
-
-	fileio_close(&fileio);
-
-	return retval;
-}
-
-void flash_set_dirty(void)
-{
-	struct flash_bank *c;
-	int i;
-
-	/* set all flash to require erasing */
-	for (c = flash_banks; c; c = c->next)
-	{
-		for (i = 0; i < c->num_sectors; i++)
-		{
-			c->sectors[i].is_erased = 0;
-		}
-	}
-}
-
 /* lookup flash bank by address */
 struct flash_bank *get_flash_bank_by_addr(struct target *target, uint32_t addr)
 {
@@ -831,239 +165,6 @@ struct flash_bank *get_flash_bank_by_addr(struct target *target, uint32_t addr)
 	return NULL;
 }
 
-/* erase given flash region, selects proper bank according to target and address */
-static int flash_iterate_address_range(struct target *target, uint32_t addr, uint32_t length,
-		int (*callback)(struct flash_bank *bank, int first, int last))
-{
-	struct flash_bank *c;
-	int first = -1;
-	int last = -1;
-	int i;
-
-	if ((c = get_flash_bank_by_addr(target, addr)) == NULL)
-		return ERROR_FLASH_DST_OUT_OF_BANK; /* no corresponding bank found */
-
-	if (c->size == 0 || c->num_sectors == 0)
-	{
-		LOG_ERROR("Bank is invalid");
-		return ERROR_FLASH_BANK_INVALID;
-	}
-
-	if (length == 0)
-	{
-		/* special case, erase whole bank when length is zero */
-		if (addr != c->base)
-			return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
-
-		return callback(c, 0, c->num_sectors - 1);
-	}
-
-	/* check whether it fits */
-	if (addr + length - 1 > c->base + c->size - 1)
-		return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
-
-	addr -= c->base;
-
-	for (i = 0; i < c->num_sectors; i++)
-	{
-		/* check whether sector overlaps with the given range and is not yet erased */
-		if (addr < c->sectors[i].offset + c->sectors[i].size && addr + length > c->sectors[i].offset && c->sectors[i].is_erased != 1) {
-			/* if first is not set yet then this is the first sector */
-			if (first == -1)
-				first = i;
-			last = i; /* and it is the last one so far in any case */
-		}
-	}
-
-	if (first == -1 || last == -1)
-		return ERROR_OK;
-
-	return callback(c, first, last);
-}
-
-
-
-int flash_erase_address_range(struct target *target, uint32_t addr, uint32_t length)
-{
-	return flash_iterate_address_range(target, addr, length, &flash_driver_erase);
-}
-
-static int flash_driver_unprotect(struct flash_bank *bank, int first, int last)
-{
-	return flash_driver_protect(bank, 0, first, last);
-}
-
-static int flash_unlock_address_range(struct target *target, uint32_t addr, uint32_t length)
-{
-	return flash_iterate_address_range(target, addr, length, &flash_driver_unprotect);
-}
-
-
-/* write (optional verify) an image to flash memory of the given target */
-static int flash_write_unlock(struct target *target, struct image *image, uint32_t *written, int erase, bool unlock)
-{
-	int retval = ERROR_OK;
-
-	int section;
-	uint32_t section_offset;
-	struct flash_bank *c;
-	int *padding;
-
-	section = 0;
-	section_offset = 0;
-
-	if (written)
-		*written = 0;
-
-	if (erase)
-	{
-		/* assume all sectors need erasing - stops any problems
-		 * when flash_write is called multiple times */
-
-		flash_set_dirty();
-	}
-
-	/* allocate padding array */
-	padding = malloc(image->num_sections * sizeof(padding));
-
-	/* loop until we reach end of the image */
-	while (section < image->num_sections)
-	{
-		uint32_t buffer_size;
-		uint8_t *buffer;
-		int section_first;
-		int section_last;
-		uint32_t run_address = image->sections[section].base_address + section_offset;
-		uint32_t run_size = image->sections[section].size - section_offset;
-		int pad_bytes = 0;
-
-		if (image->sections[section].size ==  0)
-		{
-			LOG_WARNING("empty section %d", section);
-			section++;
-			section_offset = 0;
-			continue;
-		}
-
-		/* find the corresponding flash bank */
-		if ((c = get_flash_bank_by_addr(target, run_address)) == NULL)
-		{
-			section++; /* and skip it */
-			section_offset = 0;
-			continue;
-		}
-
-		/* collect consecutive sections which fall into the same bank */
-		section_first = section;
-		section_last = section;
-		padding[section] = 0;
-		while ((run_address + run_size - 1 < c->base + c->size - 1)
-				&& (section_last + 1 < image->num_sections))
-		{
-			if (image->sections[section_last + 1].base_address < (run_address + run_size))
-			{
-				LOG_DEBUG("section %d out of order(very slightly surprising, but supported)", section_last + 1);
-				break;
-			}
-			/* if we have multiple sections within our image, flash programming could fail due to alignment issues
-			 * attempt to rebuild a consecutive buffer for the flash loader */
-			pad_bytes = (image->sections[section_last + 1].base_address) - (run_address + run_size);
-			if ((run_address + run_size + pad_bytes) > (c->base + c->size))
-				break;
-			padding[section_last] = pad_bytes;
-			run_size += image->sections[++section_last].size;
-			run_size += pad_bytes;
-			padding[section_last] = 0;
-
-			LOG_INFO("Padding image section %d with %d bytes", section_last-1, pad_bytes);
-		}
-
-		/* fit the run into bank constraints */
-		if (run_address + run_size - 1 > c->base + c->size - 1)
-		{
-			LOG_WARNING("writing %d bytes only - as image section is %d bytes and bank is only %d bytes", \
-				    (int)(c->base + c->size - run_address), (int)(run_size), (int)(c->size));
-			run_size = c->base + c->size - run_address;
-		}
-
-		/* allocate buffer */
-		buffer = malloc(run_size);
-		buffer_size = 0;
-
-		/* read sections to the buffer */
-		while (buffer_size < run_size)
-		{
-			size_t size_read;
-
-			size_read = run_size - buffer_size;
-			if (size_read > image->sections[section].size - section_offset)
-			    size_read = image->sections[section].size - section_offset;
-
-			if ((retval = image_read_section(image, section, section_offset,
-					size_read, buffer + buffer_size, &size_read)) != ERROR_OK || size_read == 0)
-			{
-				free(buffer);
-				free(padding);
-				return retval;
-			}
-
-			/* see if we need to pad the section */
-			while (padding[section]--)
-				 (buffer + buffer_size)[size_read++] = 0xff;
-
-			buffer_size += size_read;
-			section_offset += size_read;
-
-			if (section_offset >= image->sections[section].size)
-			{
-				section++;
-				section_offset = 0;
-			}
-		}
-
-		retval = ERROR_OK;
-
-		if (unlock)
-		{
-			retval = flash_unlock_address_range(target, run_address, run_size);
-		}
-		if (retval == ERROR_OK)
-		{
-			if (erase)
-			{
-				/* calculate and erase sectors */
-				retval = flash_erase_address_range(target, run_address, run_size);
-			}
-		}
-
-		if (retval == ERROR_OK)
-		{
-			/* write flash sectors */
-			retval = flash_driver_write(c, buffer, run_address - c->base, run_size);
-		}
-
-		free(buffer);
-
-		if (retval != ERROR_OK)
-		{
-			free(padding);
-			return retval; /* abort operation */
-		}
-
-		if (written != NULL)
-			*written += run_size; /* add run size to total written counter */
-	}
-
-	free(padding);
-
-	return retval;
-}
-
-int flash_write(struct target *target, struct image *image, uint32_t *written, int erase)
-{
-	return flash_write_unlock(target, image, written, erase, false);
-}
-
 int default_flash_mem_blank_check(struct flash_bank *bank)
 {
 	struct target *target = bank->target;
@@ -1156,103 +257,3 @@ int default_flash_blank_check(struct flash_bank *bank)
 
 	return ERROR_OK;
 }
-
-static const struct command_registration flash_exec_command_handlers[] = {
-	{
-		.name = "probe",
-		.handler = &handle_flash_probe_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank>",
-		.help = "identify flash bank",
-	},
-	{
-		.name = "info",
-		.handler = &handle_flash_info_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank>",
-		.help = "print bank information",
-	},
-	{
-		.name = "erase_check",
-		.handler = &handle_flash_erase_check_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank>",
-		.help = "check erase state of sectors",
-	},
-	{
-		.name = "protect_check",
-		.handler = &handle_flash_protect_check_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank>",
-		.help = "check protection state of sectors",
-	},
-	{
-		.name = "erase_sector",
-		.handler = &handle_flash_erase_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank> <first> <last>",
-		.help = "erase sectors",
-	},
-	{
-		.name = "erase_address",
-		.handler = &handle_flash_erase_address_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<address> <length>",
-		.help = "erase address range",
-
-	},
-	{
-		.name = "fillw",
-		.handler = &handle_flash_fill_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank> <address> <word_pattern> <count>",
-		.help = "fill with pattern (no autoerase)",
-	},
-	{
-		.name = "fillh",
-		.handler = &handle_flash_fill_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank> <address> <halfword_pattern> <count>",
-		.help = "fill with pattern",
-	},
-	{
-		.name = "fillb",
-		.handler = &handle_flash_fill_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank> <address> <byte_pattern> <count>",
-		.help = "fill with pattern",
-
-	},
-	{
-		.name = "write_bank",
-		.handler = &handle_flash_write_bank_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank> <file> <offset>",
-		.help = "write binary data",
-	},
-	{
-		.name = "write_image",
-		.handler = &handle_flash_write_image_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank> [erase] [unlock] <file> [offset] [type]",
-		.help = "write an image to flash"
-	},
-	{
-		.name = "protect",
-		.handler = &handle_flash_protect_command,
-		.mode = COMMAND_EXEC,
-		.usage = "<bank> <first> <last> <on | off>",
-		.help = "set protection of sectors",
-	},
-	COMMAND_REGISTRATION_DONE
-};
-
-int flash_init_drivers(struct command_context *cmd_ctx)
-{
-	if (!flash_banks)
-		return ERROR_OK;
-
-	struct command *parent = command_find_in_context(cmd_ctx, "flash");
-	return register_commands(cmd_ctx, parent, flash_exec_command_handlers);
-}
-
diff --git a/src/flash/nor/Makefile.am b/src/flash/nor/Makefile.am
index 499ebfa..67a5e55 100644
--- a/src/flash/nor/Makefile.am
+++ b/src/flash/nor/Makefile.am
@@ -31,6 +31,7 @@ noinst_HEADERS = \
 	at91sam7.h \
 	at91sam3.h \
 	avrf.h \
+	core.h \
 	cfi.h \
 	imp.h \
 	lpc2000.h \
diff --git a/src/flash/nor/core.c b/src/flash/nor/core.c
index a69c3f4..2dbf114 100644
--- a/src/flash/nor/core.c
+++ b/src/flash/nor/core.c
@@ -22,6 +22,7 @@
 #endif
 #include <flash/flash.h>
 #include <flash/nor/imp.h>
+#include <target/image.h>
 
 // in flash.c, to be moved here
 extern struct flash_driver *flash_drivers[];
@@ -37,6 +38,48 @@ struct flash_driver *flash_driver_find_by_name(const char *name)
 	return NULL;
 }
 
+int flash_driver_erase(struct flash_bank *bank, int first, int last)
+{
+	int retval;
+
+	retval = bank->driver->erase(bank, first, last);
+	if (retval != ERROR_OK)
+	{
+		LOG_ERROR("failed erasing sectors %d to %d (%d)", first, last, retval);
+	}
+
+	return retval;
+}
+
+int flash_driver_protect(struct flash_bank *bank, int set, int first, int last)
+{
+	int retval;
+
+	retval = bank->driver->protect(bank, set, first, last);
+	if (retval != ERROR_OK)
+	{
+		LOG_ERROR("failed setting protection for areas %d to %d (%d)", first, last, retval);
+	}
+
+	return retval;
+}
+
+int flash_driver_write(struct flash_bank *bank,
+		uint8_t *buffer, uint32_t offset, uint32_t count)
+{
+	int retval;
+
+	retval = bank->driver->write(bank, buffer, offset, count);
+	if (retval != ERROR_OK)
+	{
+		LOG_ERROR("error writing to flash at address 0x%08" PRIx32 " at offset 0x%8.8" PRIx32 " (%d)",
+			  bank->base, offset, retval);
+	}
+
+	return retval;
+}
+
+
 void flash_bank_add(struct flash_bank *bank)
 {
 	/* put flash bank in linked list */
@@ -63,3 +106,236 @@ struct flash_bank *flash_bank_list(void)
 {
 	return flash_banks;
 }
+
+/* erase given flash region, selects proper bank according to target and address */
+static int flash_iterate_address_range(struct target *target, uint32_t addr, uint32_t length,
+		int (*callback)(struct flash_bank *bank, int first, int last))
+{
+	struct flash_bank *c;
+	int first = -1;
+	int last = -1;
+	int i;
+
+	if ((c = get_flash_bank_by_addr(target, addr)) == NULL)
+		return ERROR_FLASH_DST_OUT_OF_BANK; /* no corresponding bank found */
+
+	if (c->size == 0 || c->num_sectors == 0)
+	{
+		LOG_ERROR("Bank is invalid");
+		return ERROR_FLASH_BANK_INVALID;
+	}
+
+	if (length == 0)
+	{
+		/* special case, erase whole bank when length is zero */
+		if (addr != c->base)
+			return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
+
+		return callback(c, 0, c->num_sectors - 1);
+	}
+
+	/* check whether it fits */
+	if (addr + length - 1 > c->base + c->size - 1)
+		return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
+
+	addr -= c->base;
+
+	for (i = 0; i < c->num_sectors; i++)
+	{
+		/* check whether sector overlaps with the given range and is not yet erased */
+		if (addr < c->sectors[i].offset + c->sectors[i].size && addr + length > c->sectors[i].offset && c->sectors[i].is_erased != 1) {
+			/* if first is not set yet then this is the first sector */
+			if (first == -1)
+				first = i;
+			last = i; /* and it is the last one so far in any case */
+		}
+	}
+
+	if (first == -1 || last == -1)
+		return ERROR_OK;
+
+	return callback(c, first, last);
+}
+
+int flash_erase_address_range(struct target *target, uint32_t addr, uint32_t length)
+{
+	return flash_iterate_address_range(target,
+			addr, length, &flash_driver_erase);
+}
+
+static int flash_driver_unprotect(struct flash_bank *bank, int first, int last)
+{
+	return flash_driver_protect(bank, 0, first, last);
+}
+
+static int flash_unlock_address_range(struct target *target, uint32_t addr, uint32_t length)
+{
+	return flash_iterate_address_range(target,
+			addr, length, &flash_driver_unprotect);
+}
+
+int flash_write_unlock(struct target *target, struct image *image,
+		uint32_t *written, int erase, bool unlock)
+{
+	int retval = ERROR_OK;
+
+	int section;
+	uint32_t section_offset;
+	struct flash_bank *c;
+	int *padding;
+
+	section = 0;
+	section_offset = 0;
+
+	if (written)
+		*written = 0;
+
+	if (erase)
+	{
+		/* assume all sectors need erasing - stops any problems
+		 * when flash_write is called multiple times */
+
+		flash_set_dirty();
+	}
+
+	/* allocate padding array */
+	padding = malloc(image->num_sections * sizeof(padding));
+
+	/* loop until we reach end of the image */
+	while (section < image->num_sections)
+	{
+		uint32_t buffer_size;
+		uint8_t *buffer;
+		int section_first;
+		int section_last;
+		uint32_t run_address = image->sections[section].base_address + section_offset;
+		uint32_t run_size = image->sections[section].size - section_offset;
+		int pad_bytes = 0;
+
+		if (image->sections[section].size ==  0)
+		{
+			LOG_WARNING("empty section %d", section);
+			section++;
+			section_offset = 0;
+			continue;
+		}
+
+		/* find the corresponding flash bank */
+		if ((c = get_flash_bank_by_addr(target, run_address)) == NULL)
+		{
+			section++; /* and skip it */
+			section_offset = 0;
+			continue;
+		}
+
+		/* collect consecutive sections which fall into the same bank */
+		section_first = section;
+		section_last = section;
+		padding[section] = 0;
+		while ((run_address + run_size - 1 < c->base + c->size - 1)
+				&& (section_last + 1 < image->num_sections))
+		{
+			if (image->sections[section_last + 1].base_address < (run_address + run_size))
+			{
+				LOG_DEBUG("section %d out of order(very slightly surprising, but supported)", section_last + 1);
+				break;
+			}
+			/* if we have multiple sections within our image, flash programming could fail due to alignment issues
+			 * attempt to rebuild a consecutive buffer for the flash loader */
+			pad_bytes = (image->sections[section_last + 1].base_address) - (run_address + run_size);
+			if ((run_address + run_size + pad_bytes) > (c->base + c->size))
+				break;
+			padding[section_last] = pad_bytes;
+			run_size += image->sections[++section_last].size;
+			run_size += pad_bytes;
+			padding[section_last] = 0;
+
+			LOG_INFO("Padding image section %d with %d bytes", section_last-1, pad_bytes);
+		}
+
+		/* fit the run into bank constraints */
+		if (run_address + run_size - 1 > c->base + c->size - 1)
+		{
+			LOG_WARNING("writing %d bytes only - as image section is %d bytes and bank is only %d bytes", \
+				    (int)(c->base + c->size - run_address), (int)(run_size), (int)(c->size));
+			run_size = c->base + c->size - run_address;
+		}
+
+		/* allocate buffer */
+		buffer = malloc(run_size);
+		buffer_size = 0;
+
+		/* read sections to the buffer */
+		while (buffer_size < run_size)
+		{
+			size_t size_read;
+
+			size_read = run_size - buffer_size;
+			if (size_read > image->sections[section].size - section_offset)
+			    size_read = image->sections[section].size - section_offset;
+
+			if ((retval = image_read_section(image, section, section_offset,
+					size_read, buffer + buffer_size, &size_read)) != ERROR_OK || size_read == 0)
+			{
+				free(buffer);
+				free(padding);
+				return retval;
+			}
+
+			/* see if we need to pad the section */
+			while (padding[section]--)
+				 (buffer + buffer_size)[size_read++] = 0xff;
+
+			buffer_size += size_read;
+			section_offset += size_read;
+
+			if (section_offset >= image->sections[section].size)
+			{
+				section++;
+				section_offset = 0;
+			}
+		}
+
+		retval = ERROR_OK;
+
+		if (unlock)
+		{
+			retval = flash_unlock_address_range(target, run_address, run_size);
+		}
+		if (retval == ERROR_OK)
+		{
+			if (erase)
+			{
+				/* calculate and erase sectors */
+				retval = flash_erase_address_range(target, run_address, run_size);
+			}
+		}
+
+		if (retval == ERROR_OK)
+		{
+			/* write flash sectors */
+			retval = flash_driver_write(c, buffer, run_address - c->base, run_size);
+		}
+
+		free(buffer);
+
+		if (retval != ERROR_OK)
+		{
+			free(padding);
+			return retval; /* abort operation */
+		}
+
+		if (written != NULL)
+			*written += run_size; /* add run size to total written counter */
+	}
+
+	free(padding);
+
+	return retval;
+}
+
+int flash_write(struct target *target, struct image *image,
+		uint32_t *written, int erase)
+{
+	return flash_write_unlock(target, image, written, erase, false);
+}
diff --git a/src/flash/nor/imp.h b/src/flash/nor/imp.h
index 23ac476..ade7297 100644
--- a/src/flash/nor/imp.h
+++ b/src/flash/nor/imp.h
@@ -33,4 +33,13 @@ void flash_bank_add(struct flash_bank *bank);
  */
 struct flash_bank *flash_bank_list(void);
 
+int flash_driver_erase(struct flash_bank *bank, int first, int last);
+int flash_driver_protect(struct flash_bank *bank, int set, int first, int last);
+int flash_driver_write(struct flash_bank *bank,
+		uint8_t *buffer, uint32_t offset, uint32_t count);
+
+/* write (optional verify) an image to flash memory of the given target */
+int flash_write_unlock(struct target *target, struct image *image,
+		uint32_t *written, int erase, bool unlock);
+
 #endif // FLASH_NOR_IMP_H
diff --git a/src/flash/nor/tcl.c b/src/flash/nor/tcl.c
index b00516d..6598652 100644
--- a/src/flash/nor/tcl.c
+++ b/src/flash/nor/tcl.c
@@ -23,6 +23,731 @@
 #include "config.h"
 #endif
 #include "imp.h"
+#include <helper/time_support.h>
+#include <target/image.h>
+
+COMMAND_HELPER(flash_command_get_bank, unsigned name_index,
+		struct flash_bank **bank)
+{
+	const char *name = CMD_ARGV[name_index];
+	*bank = get_flash_bank_by_name(name);
+	if (*bank)
+		return ERROR_OK;
+
+	unsigned bank_num;
+	COMMAND_PARSE_NUMBER(uint, name, bank_num);
+
+	*bank = get_flash_bank_by_num(bank_num);
+	if (!*bank)
+	{
+		command_print(CMD_CTX, "flash bank '%s' not found", name);
+		return ERROR_INVALID_ARGUMENTS;
+	}
+	return ERROR_OK;
+}
+
+
+COMMAND_HANDLER(handle_flash_info_command)
+{
+	struct flash_bank *p;
+	uint32_t i = 0;
+	int j = 0;
+	int retval;
+
+	if (CMD_ARGC != 1)
+		return ERROR_COMMAND_SYNTAX_ERROR;
+
+	unsigned bank_nr;
+	COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], bank_nr);
+
+	for (p = flash_bank_list(); p; p = p->next, i++)
+	{
+		if (i != bank_nr)
+			continue;
+
+		char buf[1024];
+
+		/* attempt auto probe */
+		if ((retval = p->driver->auto_probe(p)) != ERROR_OK)
+			return retval;
+
+		command_print(CMD_CTX,
+			      "#%" PRIi32 " : %s at 0x%8.8" PRIx32 ", size 0x%8.8" PRIx32 ", buswidth %i, chipwidth %i",
+			      i,
+			      p->driver->name,
+			      p->base,
+			      p->size,
+			      p->bus_width,
+			      p->chip_width);
+		for (j = 0; j < p->num_sectors; j++)
+		{
+			char *protect_state;
+
+			if (p->sectors[j].is_protected == 0)
+				protect_state = "not protected";
+			else if (p->sectors[j].is_protected == 1)
+				protect_state = "protected";
+			else
+				protect_state = "protection state unknown";
+
+			command_print(CMD_CTX,
+				      "\t#%3i: 0x%8.8" PRIx32 " (0x%" PRIx32 " %" PRIi32 "kB) %s",
+				      j,
+				      p->sectors[j].offset,
+				      p->sectors[j].size,
+				      p->sectors[j].size >> 10,
+				      protect_state);
+		}
+
+		*buf = '\0'; /* initialize buffer, otherwise it migh contain garbage if driver function fails */
+		retval = p->driver->info(p, buf, sizeof(buf));
+		command_print(CMD_CTX, "%s", buf);
+		if (retval != ERROR_OK)
+			LOG_ERROR("error retrieving flash info (%d)", retval);
+	}
+
+	return ERROR_OK;
+}
+
+COMMAND_HANDLER(handle_flash_probe_command)
+{
+	int retval;
+
+	if (CMD_ARGC != 1)
+	{
+		return ERROR_COMMAND_SYNTAX_ERROR;
+	}
+
+	unsigned bank_nr;
+	COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], bank_nr);
+	struct flash_bank *p = get_flash_bank_by_num_noprobe(bank_nr);
+	if (p)
+	{
+		if ((retval = p->driver->probe(p)) == ERROR_OK)
+		{
+			command_print(CMD_CTX, "flash '%s' found at 0x%8.8" PRIx32, p->driver->name, p->base);
+		}
+		else if (retval == ERROR_FLASH_BANK_INVALID)
+		{
+			command_print(CMD_CTX, "probing failed for flash bank '#%s' at 0x%8.8" PRIx32,
+						  CMD_ARGV[0], p->base);
+		}
+		else
+		{
+			command_print(CMD_CTX, "unknown error when probing flash bank '#%s' at 0x%8.8" PRIx32,
+						  CMD_ARGV[0], p->base);
+		}
+	}
+	else
+	{
+		command_print(CMD_CTX, "flash bank '#%s' is out of bounds", CMD_ARGV[0]);
+	}
+
+	return ERROR_OK;
+}
+
+COMMAND_HANDLER(handle_flash_erase_check_command)
+{
+	if (CMD_ARGC != 1)
+	{
+		return ERROR_COMMAND_SYNTAX_ERROR;
+	}
+
+	struct flash_bank *p;
+	int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
+	if (ERROR_OK != retval)
+		return retval;
+
+	int j;
+	if ((retval = p->driver->erase_check(p)) == ERROR_OK)
+	{
+		command_print(CMD_CTX, "successfully checked erase state");
+	}
+	else
+	{
+		command_print(CMD_CTX, "unknown error when checking erase state of flash bank #%s at 0x%8.8" PRIx32,
+			CMD_ARGV[0], p->base);
+	}
+
+	for (j = 0; j < p->num_sectors; j++)
+	{
+		char *erase_state;
+
+		if (p->sectors[j].is_erased == 0)
+			erase_state = "not erased";
+		else if (p->sectors[j].is_erased == 1)
+			erase_state = "erased";
+		else
+			erase_state = "erase state unknown";
+
+		command_print(CMD_CTX,
+			      "\t#%3i: 0x%8.8" PRIx32 " (0x%" PRIx32 " %" PRIi32 "kB) %s",
+			      j,
+			      p->sectors[j].offset,
+			      p->sectors[j].size,
+			      p->sectors[j].size >> 10,
+			      erase_state);
+	}
+
+	return ERROR_OK;
+}
+
+COMMAND_HANDLER(handle_flash_erase_address_command)
+{
+	struct flash_bank *p;
+	int retval;
+	int address;
+	int length;
+
+	struct target *target = get_current_target(CMD_CTX);
+
+	if (CMD_ARGC != 2)
+		return ERROR_COMMAND_SYNTAX_ERROR;
+
+	COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], address);
+	COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], length);
+	if (length <= 0)
+	{
+		command_print(CMD_CTX, "Length must be >0");
+		return ERROR_COMMAND_SYNTAX_ERROR;
+	}
+
+	p = get_flash_bank_by_addr(target, address);
+	if (p == NULL)
+	{
+		return ERROR_FAIL;
+	}
+
+	/* We can't know if we did a resume + halt, in which case we no longer know the erased state */
+	flash_set_dirty();
+
+	struct duration bench;
+	duration_start(&bench);
+
+	retval = flash_erase_address_range(target, address, length);
+
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
+	{
+		command_print(CMD_CTX, "erased address 0x%8.8x (length %i)"
+				" in %fs (%0.3f kb/s)", address, length,
+				duration_elapsed(&bench), duration_kbps(&bench, length));
+	}
+
+	return retval;
+}
+
+COMMAND_HANDLER(handle_flash_protect_check_command)
+{
+	if (CMD_ARGC != 1)
+		return ERROR_COMMAND_SYNTAX_ERROR;
+
+	struct flash_bank *p;
+	int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
+	if (ERROR_OK != retval)
+		return retval;
+
+	if ((retval = p->driver->protect_check(p)) == ERROR_OK)
+	{
+		command_print(CMD_CTX, "successfully checked protect state");
+	}
+	else if (retval == ERROR_FLASH_OPERATION_FAILED)
+	{
+		command_print(CMD_CTX, "checking protection state failed (possibly unsupported) by flash #%s at 0x%8.8" PRIx32, CMD_ARGV[0], p->base);
+	}
+	else
+	{
+		command_print(CMD_CTX, "unknown error when checking protection state of flash bank '#%s' at 0x%8.8" PRIx32, CMD_ARGV[0], p->base);
+	}
+
+	return ERROR_OK;
+}
+
+static int flash_check_sector_parameters(struct command_context *cmd_ctx,
+		uint32_t first, uint32_t last, uint32_t num_sectors)
+{
+	if (!(first <= last)) {
+		command_print(cmd_ctx, "ERROR: "
+				"first sector must be <= last sector");
+		return ERROR_FAIL;
+	}
+
+	if (!(last <= (num_sectors - 1))) {
+		command_print(cmd_ctx, "ERROR: last sector must be <= %d",
+				(int) num_sectors - 1);
+		return ERROR_FAIL;
+	}
+
+	return ERROR_OK;
+}
+
+COMMAND_HANDLER(handle_flash_erase_command)
+{
+	if (CMD_ARGC != 3)
+		return ERROR_COMMAND_SYNTAX_ERROR;
+
+	uint32_t bank_nr;
+	uint32_t first;
+	uint32_t last;
+
+	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], bank_nr);
+	struct flash_bank *p = get_flash_bank_by_num(bank_nr);
+	if (!p)
+		return ERROR_OK;
+
+	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], first);
+	if (strcmp(CMD_ARGV[2], "last") == 0)
+		last = p->num_sectors - 1;
+	else
+		COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], last);
+
+	int retval;
+	if ((retval = flash_check_sector_parameters(CMD_CTX,
+			first, last, p->num_sectors)) != ERROR_OK)
+		return retval;
+
+	struct duration bench;
+	duration_start(&bench);
+
+	retval = flash_driver_erase(p, first, last);
+
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
+	{
+		command_print(CMD_CTX, "erased sectors %" PRIu32 " "
+				"through %" PRIu32" on flash bank %" PRIu32 " "
+				"in %fs", first, last, bank_nr, duration_elapsed(&bench));
+	}
+
+	return ERROR_OK;
+}
+
+COMMAND_HANDLER(handle_flash_protect_command)
+{
+	if (CMD_ARGC != 4)
+		return ERROR_COMMAND_SYNTAX_ERROR;
+
+	uint32_t bank_nr;
+	uint32_t first;
+	uint32_t last;
+
+	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], bank_nr);
+	struct flash_bank *p = get_flash_bank_by_num(bank_nr);
+	if (!p)
+		return ERROR_OK;
+
+	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], first);
+	if (strcmp(CMD_ARGV[2], "last") == 0)
+		last = p->num_sectors - 1;
+	else
+		COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], last);
+
+	bool set;
+	COMMAND_PARSE_ON_OFF(CMD_ARGV[3], set);
+
+	int retval;
+	if ((retval = flash_check_sector_parameters(CMD_CTX,
+			first, last, p->num_sectors)) != ERROR_OK)
+		return retval;
+
+	retval = flash_driver_protect(p, set, first, last);
+	if (retval == ERROR_OK) {
+		command_print(CMD_CTX, "%s protection for sectors %i "
+				"through %i on flash bank %i",
+			(set) ? "set" : "cleared", (int) first,
+			(int) last, (int) bank_nr);
+	}
+
+	return ERROR_OK;
+}
+
+COMMAND_HANDLER(handle_flash_write_image_command)
+{
+	struct target *target = get_current_target(CMD_CTX);
+
+	struct image image;
+	uint32_t written;
+
+	int retval;
+
+	if (CMD_ARGC < 1)
+	{
+		return ERROR_COMMAND_SYNTAX_ERROR;
+	}
+
+	/* flash auto-erase is disabled by default*/
+	int auto_erase = 0;
+	bool auto_unlock = false;
+
+	for (;;)
+	{
+		if (strcmp(CMD_ARGV[0], "erase") == 0)
+		{
+			auto_erase = 1;
+			CMD_ARGV++;
+			CMD_ARGC--;
+			command_print(CMD_CTX, "auto erase enabled");
+		} else if (strcmp(CMD_ARGV[0], "unlock") == 0)
+		{
+			auto_unlock = true;
+			CMD_ARGV++;
+			CMD_ARGC--;
+			command_print(CMD_CTX, "auto unlock enabled");
+		} else
+		{
+			break;
+		}
+	}
+
+	if (CMD_ARGC < 1)
+	{
+		return ERROR_COMMAND_SYNTAX_ERROR;
+	}
+
+	if (!target)
+	{
+		LOG_ERROR("no target selected");
+		return ERROR_FAIL;
+	}
+
+	struct duration bench;
+	duration_start(&bench);
+
+	if (CMD_ARGC >= 2)
+	{
+		image.base_address_set = 1;
+		COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], image.base_address);
+	}
+	else
+	{
+		image.base_address_set = 0;
+		image.base_address = 0x0;
+	}
+
+	image.start_address_set = 0;
+
+	retval = image_open(&image, CMD_ARGV[0], (CMD_ARGC == 3) ? CMD_ARGV[2] : NULL);
+	if (retval != ERROR_OK)
+	{
+		return retval;
+	}
+
+	retval = flash_write_unlock(target, &image, &written, auto_erase, auto_unlock);
+	if (retval != ERROR_OK)
+	{
+		image_close(&image);
+		return retval;
+	}
+
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
+	{
+		command_print(CMD_CTX, "wrote %" PRIu32 " byte from file %s "
+				"in %fs (%0.3f kb/s)", written, CMD_ARGV[0],
+				duration_elapsed(&bench), duration_kbps(&bench, written));
+	}
+
+	image_close(&image);
+
+	return retval;
+}
+
+COMMAND_HANDLER(handle_flash_fill_command)
+{
+	int err = ERROR_OK;
+	uint32_t address;
+	uint32_t pattern;
+	uint32_t count;
+	uint32_t wrote = 0;
+	uint32_t cur_size = 0;
+	uint32_t chunk_count;
+	struct target *target = get_current_target(CMD_CTX);
+	uint32_t i;
+	uint32_t wordsize;
+	int retval = ERROR_OK;
+
+	static size_t const chunksize = 1024;
+	uint8_t *chunk = malloc(chunksize);
+	if (chunk == NULL)
+		return ERROR_FAIL;
+
+	uint8_t *readback = malloc(chunksize);
+	if (readback == NULL)
+	{
+		free(chunk);
+		return ERROR_FAIL;
+	}
+
+
+	if (CMD_ARGC != 3)
+	{
+		retval = ERROR_COMMAND_SYNTAX_ERROR;
+		goto done;
+	}
+
+
+	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
+	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], pattern);
+	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], count);
+
+	if (count == 0)
+		goto done;
+
+	switch (CMD_NAME[4])
+	{
+	case 'w':
+		wordsize = 4;
+		break;
+	case 'h':
+		wordsize = 2;
+		break;
+	case 'b':
+		wordsize = 1;
+		break;
+	default:
+		retval = ERROR_COMMAND_SYNTAX_ERROR;
+		goto done;
+	}
+
+	chunk_count = MIN(count, (chunksize / wordsize));
+	switch (wordsize)
+	{
+	case 4:
+		for (i = 0; i < chunk_count; i++)
+		{
+			target_buffer_set_u32(target, chunk + i * wordsize, pattern);
+		}
+		break;
+	case 2:
+		for (i = 0; i < chunk_count; i++)
+		{
+			target_buffer_set_u16(target, chunk + i * wordsize, pattern);
+		}
+		break;
+	case 1:
+		memset(chunk, pattern, chunk_count);
+		break;
+	default:
+		LOG_ERROR("BUG: can't happen");
+		exit(-1);
+	}
+
+	struct duration bench;
+	duration_start(&bench);
+
+	for (wrote = 0; wrote < (count*wordsize); wrote += cur_size)
+	{
+		cur_size = MIN((count*wordsize - wrote), sizeof(chunk));
+		struct flash_bank *bank;
+		bank = get_flash_bank_by_addr(target, address);
+		if (bank == NULL)
+		{
+			retval = ERROR_FAIL;
+			goto done;
+		}
+		err = flash_driver_write(bank, chunk, address - bank->base + wrote, cur_size);
+		if (err != ERROR_OK)
+		{
+			retval = err;
+			goto done;
+		}
+
+		err = target_read_buffer(target, address + wrote, cur_size, readback);
+		if (err != ERROR_OK)
+		{
+			retval = err;
+			goto done;
+		}
+
+		unsigned i;
+		for (i = 0; i < cur_size; i++)
+		{
+			if (readback[i]!=chunk[i])
+			{
+				LOG_ERROR("Verfication error address 0x%08" PRIx32 ", read back 0x%02x, expected 0x%02x",
+						  address + wrote + i, readback[i], chunk[i]);
+				retval = ERROR_FAIL;
+				goto done;
+			}
+		}
+	}
+
+	if (duration_measure(&bench) == ERROR_OK)
+	{
+		command_print(CMD_CTX, "wrote %" PRIu32 " bytes to 0x%8.8" PRIx32
+				" in %fs (%0.3f kb/s)", wrote, address,
+				duration_elapsed(&bench), duration_kbps(&bench, wrote));
+	}
+
+	done:
+	free(readback);
+	free(chunk);
+
+	return retval;
+}
+
+COMMAND_HANDLER(handle_flash_write_bank_command)
+{
+	uint32_t offset;
+	uint8_t *buffer;
+	struct fileio fileio;
+
+	if (CMD_ARGC != 3)
+		return ERROR_COMMAND_SYNTAX_ERROR;
+
+	struct duration bench;
+	duration_start(&bench);
+
+	struct flash_bank *p;
+	int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
+	if (ERROR_OK != retval)
+		return retval;
+
+	COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], offset);
+
+	if (fileio_open(&fileio, CMD_ARGV[1], FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
+	{
+		return ERROR_OK;
+	}
+
+	buffer = malloc(fileio.size);
+	size_t buf_cnt;
+	if (fileio_read(&fileio, fileio.size, buffer, &buf_cnt) != ERROR_OK)
+	{
+		free(buffer);
+		fileio_close(&fileio);
+		return ERROR_OK;
+	}
+
+	retval = flash_driver_write(p, buffer, offset, buf_cnt);
+
+	free(buffer);
+	buffer = NULL;
+
+	if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
+	{
+		command_print(CMD_CTX, "wrote %zu byte from file %s to flash bank %u"
+				" at offset 0x%8.8" PRIx32 " in %fs (%0.3f kb/s)",
+				fileio.size, CMD_ARGV[1], p->bank_number, offset,
+				duration_elapsed(&bench), duration_kbps(&bench, fileio.size));
+	}
+
+	fileio_close(&fileio);
+
+	return retval;
+}
+
+void flash_set_dirty(void)
+{
+	struct flash_bank *c;
+	int i;
+
+	/* set all flash to require erasing */
+	for (c = flash_bank_list(); c; c = c->next)
+	{
+		for (i = 0; i < c->num_sectors; i++)
+		{
+			c->sectors[i].is_erased = 0;
+		}
+	}
+}
+
+static const struct command_registration flash_exec_command_handlers[] = {
+	{
+		.name = "probe",
+		.handler = &handle_flash_probe_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank>",
+		.help = "identify flash bank",
+	},
+	{
+		.name = "info",
+		.handler = &handle_flash_info_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank>",
+		.help = "print bank information",
+	},
+	{
+		.name = "erase_check",
+		.handler = &handle_flash_erase_check_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank>",
+		.help = "check erase state of sectors",
+	},
+	{
+		.name = "protect_check",
+		.handler = &handle_flash_protect_check_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank>",
+		.help = "check protection state of sectors",
+	},
+	{
+		.name = "erase_sector",
+		.handler = &handle_flash_erase_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank> <first> <last>",
+		.help = "erase sectors",
+	},
+	{
+		.name = "erase_address",
+		.handler = &handle_flash_erase_address_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<address> <length>",
+		.help = "erase address range",
+
+	},
+	{
+		.name = "fillw",
+		.handler = &handle_flash_fill_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank> <address> <word_pattern> <count>",
+		.help = "fill with pattern (no autoerase)",
+	},
+	{
+		.name = "fillh",
+		.handler = &handle_flash_fill_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank> <address> <halfword_pattern> <count>",
+		.help = "fill with pattern",
+	},
+	{
+		.name = "fillb",
+		.handler = &handle_flash_fill_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank> <address> <byte_pattern> <count>",
+		.help = "fill with pattern",
+
+	},
+	{
+		.name = "write_bank",
+		.handler = &handle_flash_write_bank_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank> <file> <offset>",
+		.help = "write binary data",
+	},
+	{
+		.name = "write_image",
+		.handler = &handle_flash_write_image_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank> [erase] [unlock] <file> [offset] [type]",
+		.help = "write an image to flash"
+	},
+	{
+		.name = "protect",
+		.handler = &handle_flash_protect_command,
+		.mode = COMMAND_EXEC,
+		.usage = "<bank> <first> <last> <on | off>",
+		.help = "set protection of sectors",
+	},
+	COMMAND_REGISTRATION_DONE
+};
+
+int flash_init_drivers(struct command_context *cmd_ctx)
+{
+	if (!flash_bank_list())
+		return ERROR_OK;
+
+	struct command *parent = command_find_in_context(cmd_ctx, "flash");
+	return register_commands(cmd_ctx, parent, flash_exec_command_handlers);
+}
+
 
 COMMAND_HANDLER(handle_flash_bank_command)
 {