* Copyright (C) 2007-2010 Øyvind Harboe <oyvind.harboe@zylin.com> *
* Copyright (C) 2008 by Spencer Oliver <spen@spen-soft.co.uk> *
* Copyright (C) 2009 Zachary T Welch <zw@superlucidity.net> *
+ * Copyright (C) 2010 by Antonio Borneo <borneo.antonio@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
int flash_driver_protect(struct flash_bank *bank, int set, int first, int last)
{
int retval;
- bool updated = false;
-
- /* NOTE: "first == last" means (un?)protect just that sector.
- code including Lower level ddrivers may rely on this "first <= last"
- * invariant.
- */
/* callers may not supply illegal parameters ... */
if (first < 0 || first > last || last >= bank->num_sectors)
+ {
+ LOG_ERROR("illegal sector range");
return ERROR_FAIL;
+ }
/* force "set" to 0/1 */
set = !!set;
- /*
- * Filter out what trivial nonsense we can, so drivers don't have to.
+ /* DANGER!
*
- * Don't tell drivers to change to the current state... it's needless,
- * and reducing the amount of work to be done (potentially to nothing)
- * speeds at least some things up.
- */
-scan:
- for (int i = first; i <= last; i++) {
- struct flash_sector *sector = bank->sectors + i;
-
- /* Only filter requests to protect the already-protected, or
- * to unprotect the already-unprotected. Changing from the
- * unknown state (-1) to a known one is unwise but allowed;
- * protection status is best checked first.
- */
- if (sector->is_protected != set)
- continue;
-
- /* Shrink this range of sectors from the start; don't overrun
- * the end. Also shrink from the end; don't overun the start.
- *
- * REVISIT we could handle discontiguous regions by issuing
- * more than one driver request. How much would that matter?
- */
- if (i == first && i != last) {
- updated = true;
- first++;
- } else if (i == last && i != first) {
- updated = true;
- last--;
- }
- }
-
- /* updating the range affects the tests in the scan loop above; so
- * re-scan, to make sure we didn't miss anything.
- */
- if (updated) {
- updated = false;
- goto scan;
- }
-
- /* Single sector, already protected? Nothing to do!
- * We may have trimmed our parameters into this degenerate case.
+ * We must not use any cached information about protection state!!!!
*
- * FIXME repeating the "is_protected==set" test is a giveaway that
- * this fast-exit belongs earlier, in the trim-it-down loop; mve.
- * */
- if (first == last && bank->sectors[first].is_protected == set)
- return ERROR_OK;
-
-
- /* Note that we don't pass illegal parameters to drivers; any
- * trimming just turns one valid range into another one.
+ * There are a million things that could change the protect state:
+ *
+ * the target could have reset, power cycled, been hot plugged,
+ * the application could have run, etc.
+ *
+ * Drivers only receive valid sector range.
*/
retval = bank->driver->protect(bank, set, first, last);
if (retval != ERROR_OK)
return retval;
}
+int flash_driver_read(struct flash_bank *bank,
+ uint8_t *buffer, uint32_t offset, uint32_t count)
+{
+ int retval;
+
+ LOG_DEBUG("call flash_driver_read()");
+
+ retval = bank->driver->read(bank, buffer, offset, count);
+ if (retval != ERROR_OK)
+ {
+ LOG_ERROR("error reading to flash at address 0x%08" PRIx32 " at offset 0x%8.8" PRIx32 " (%d)",
+ bank->base, offset, retval);
+ }
+
+ return retval;
+}
+
+int default_flash_read(struct flash_bank *bank,
+ uint8_t *buffer, uint32_t offset, uint32_t count)
+{
+ return target_read_buffer(bank->target, offset + bank->base, count, buffer);
+}
+
void flash_bank_add(struct flash_bank *bank)
{
/* put flash bank in linked list */
return i;
}
-struct flash_bank *get_flash_bank_by_name(const char *name)
+struct flash_bank *get_flash_bank_by_name_noprobe(const char *name)
{
unsigned requested = get_flash_name_index(name);
unsigned found = 0;
return NULL;
}
+struct flash_bank *get_flash_bank_by_name(const char *name)
+{
+ struct flash_bank *bank;
+ int retval;
+
+ bank = get_flash_bank_by_name_noprobe(name);
+ if (bank != NULL)
+ {
+ retval = bank->driver->auto_probe(bank);
+
+ if (retval != ERROR_OK)
+ {
+ LOG_ERROR("auto_probe failed %d\n", retval);
+ return NULL;
+ }
+ }
+
+ return bank;
+}
+
int get_flash_bank_by_num(int num, struct flash_bank **bank)
{
struct flash_bank *p = get_flash_bank_by_num_noprobe(num);
return flash_driver_protect(bank, 0, first, last);
}
-static int flash_unlock_address_range(struct target *target, uint32_t addr, uint32_t length)
+int flash_unlock_address_range(struct target *target, uint32_t addr, uint32_t length)
{
/* By default, pad to sector boundaries ... the real issue here
* is that our (only) caller *permanently* removes protection,
intptr_t diff = (intptr_t)sections[section] - (intptr_t)image->sections;
int t_section_num = diff / sizeof(struct imageection);
- LOG_DEBUG("image_read_section: section = %d, t_section_num = %d, section_offset = %d, buffer_size = %d, size_read = %d",
+ LOG_DEBUG("image_read_section: section = %d, t_section_num = %d, section_offset = %d, buffer_size = %d, size_read = %d",
(int)section,
(int)t_section_num, (int)section_offset, (int)buffer_size, (int)size_read);
if ((retval = image_read_section(image, t_section_num, section_offset,
{
return flash_write_unlock(target, image, written, erase, false);
}
-
-/**
- * Invalidates cached flash state which a target can change as it runs.
- *
- * @param target The target being resumed
- *
- * OpenOCD caches some flash state for brief periods. For example, a sector
- * that is protected must be unprotected before OpenOCD tries to write it,
- * Also, a sector that's not erased must be erased before it's written.
- *
- * As a rule, OpenOCD and target firmware can both modify the flash, so when
- * a target starts running, OpenOCD needs to invalidate its cached state.
- */
-void nor_resume(struct target *target)
-{
- struct flash_bank *bank;
-
- for (bank = flash_banks; bank; bank = bank->next) {
- int i;
-
- if (bank->target != target)
- continue;
-
- for (i = 0; i < bank->num_sectors; i++) {
- struct flash_sector *sector = bank->sectors + i;
-
- sector->is_erased = -1;
- sector->is_protected = -1;
- }
- }
-}
projects / fw / openocd / blobdiff