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-rw-r--r--src/flash/nor/core.c87
-rw-r--r--src/flash/nor/core.h6
-rw-r--r--src/flash/nor/tcl.c34
-rw-r--r--src/server/gdb_server.c16
4 files changed, 117 insertions, 26 deletions
diff --git a/src/flash/nor/core.c b/src/flash/nor/core.c
index 9083ed15..aedaa866 100644
--- a/src/flash/nor/core.c
+++ b/src/flash/nor/core.c
@@ -287,9 +287,22 @@ int default_flash_blank_check(struct flash_bank *bank)
return ERROR_OK;
}
-/* erase given flash region, selects proper bank according to target and address */
+/* Manipulate given flash region, selecting the bank according to target
+ * and address. Maps an address range to a set of sectors, and issues
+ * the callback() on that set ... e.g. to erase or unprotect its members.
+ *
+ * (Note a current bad assumption: that protection operates on the same
+ * size sectors as erase operations use.)
+ *
+ * The "pad_reason" parameter is a kind of boolean: when it's NULL, the
+ * range must fit those sectors exactly. This is clearly safe; it can't
+ * erase data which the caller said to leave alone, for example. If it's
+ * non-NULL, rather than failing, extra data in the first and/or last
+ * sectors will be added to the range, and that reason string is used when
+ * warning about those additions.
+ */
static int flash_iterate_address_range(struct target *target,
- uint32_t addr, uint32_t length,
+ char *pad_reason, uint32_t addr, uint32_t length,
int (*callback)(struct flash_bank *bank, int first, int last))
{
struct flash_bank *c;
@@ -328,18 +341,53 @@ static int flash_iterate_address_range(struct target *target,
for (i = 0; i < c->num_sectors; i++)
{
struct flash_sector *f = c->sectors + i;
+ uint32_t end = f->offset + f->size;
/* start only on a sector boundary */
if (first < 0) {
+ /* scanned past the first sector? */
+ if (addr < f->offset)
+ break;
+
/* is this the first sector? */
if (addr == f->offset)
first = i;
- else if (addr < f->offset)
- break;
+
+ /* Does this need head-padding? If so, pad and warn;
+ * or else force an error.
+ *
+ * Such padding can make trouble, since *WE* can't
+ * ever know if that data was in use. The warning
+ * should help users sort out messes later.
+ */
+ else if (addr < end && pad_reason) {
+ /* FIXME say how many bytes (e.g. 80 KB) */
+ LOG_WARNING("Adding extra %s range, "
+ "%#8.8x to %#8.8x",
+ pad_reason,
+ (unsigned) f->offset,
+ (unsigned) addr - 1);
+ first = i;
+ } else
+ continue;
}
/* is this (also?) the last sector? */
- if (last_addr == f->offset + f->size) {
+ if (last_addr == end) {
+ last = i;
+ break;
+ }
+
+ /* Does this need tail-padding? If so, pad and warn;
+ * or else force an error.
+ */
+ if (last_addr < end && pad_reason) {
+ /* FIXME say how many bytes (e.g. 80 KB) */
+ LOG_WARNING("Adding extra %s range, "
+ "%#8.8x to %#8.8x",
+ pad_reason,
+ (unsigned) last_addr,
+ (unsigned) end - 1);
last = i;
break;
}
@@ -358,18 +406,17 @@ static int flash_iterate_address_range(struct target *target,
return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
}
- /* The NOR driver may trim this range down, based on
- * whether or not a given sector is already erased.
- *
- * REVISIT should *we* trim it... ?
+ /* The NOR driver may trim this range down, based on what
+ * sectors are already erased/unprotected. GDB currently
+ * blocks such optimizations.
*/
return callback(c, first, last);
}
int flash_erase_address_range(struct target *target,
- uint32_t addr, uint32_t length)
+ bool pad, uint32_t addr, uint32_t length)
{
- return flash_iterate_address_range(target,
+ return flash_iterate_address_range(target, pad ? "erase" : NULL,
addr, length, &flash_driver_erase);
}
@@ -380,7 +427,11 @@ static int flash_driver_unprotect(struct flash_bank *bank, int first, int last)
static int flash_unlock_address_range(struct target *target, uint32_t addr, uint32_t length)
{
- return flash_iterate_address_range(target,
+ /* By default, pad to sector boundaries ... the real issue here
+ * is that our (only) caller *permanently* removes protection,
+ * and doesn't restore it.
+ */
+ return flash_iterate_address_range(target, "unprotect",
addr, length, &flash_driver_unprotect);
}
@@ -394,6 +445,12 @@ int flash_write_unlock(struct target *target, struct image *image,
struct flash_bank *c;
int *padding;
+ /* REVISIT do_pad should perhaps just be another parameter.
+ * GDB wouldn't ever need it, since it erases separately.
+ * But "flash write_image" commands might want that option.
+ */
+ bool do_pad = false;
+
section = 0;
section_offset = 0;
@@ -470,7 +527,8 @@ int flash_write_unlock(struct target *target, struct image *image,
* In both cases, the extra writes slow things down.
*/
- /* if we have multiple sections within our image, flash programming could fail due to alignment issues
+ /* 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))
@@ -560,7 +618,8 @@ int flash_write_unlock(struct target *target, struct image *image,
if (erase)
{
/* calculate and erase sectors */
- retval = flash_erase_address_range(target, run_address, run_size);
+ retval = flash_erase_address_range(target,
+ do_pad, run_address, run_size);
}
}
diff --git a/src/flash/nor/core.h b/src/flash/nor/core.h
index 36e163df..b164b8dd 100644
--- a/src/flash/nor/core.h
+++ b/src/flash/nor/core.h
@@ -102,10 +102,14 @@ int flash_init_drivers(struct command_context *cmd_ctx);
/**
* Erases @a length bytes in the @a target flash, starting at @a addr.
+ * The range @a addr to @a addr + @a length - 1 must be strictly
+ * sector aligned, unless @a pad is true. Setting @a pad true extends
+ * the range, at beginning and/or end, if needed for sector alignment.
* @returns ERROR_OK if successful; otherwise, an error code.
*/
int flash_erase_address_range(struct target *target,
- uint32_t addr, uint32_t length);
+ bool pad, uint32_t addr, uint32_t length);
+
/**
* Writes @a image into the @a target flash. The @a written parameter
* will contain the
diff --git a/src/flash/nor/tcl.c b/src/flash/nor/tcl.c
index b7e80df2..cf40a81a 100644
--- a/src/flash/nor/tcl.c
+++ b/src/flash/nor/tcl.c
@@ -203,14 +203,29 @@ COMMAND_HANDLER(handle_flash_erase_address_command)
int retval;
int address;
int length;
-
+ bool do_pad = false;
struct target *target = get_current_target(CMD_CTX);
- if (CMD_ARGC != 2)
+ switch (CMD_ARGC) {
+ case 3:
+ /* Optionally pad out the address range to block/sector
+ * boundaries. We can't know if there's data in that part
+ * of the flash; only do padding if we're told to.
+ */
+ if (strcmp("pad", CMD_ARGV[0]) != 0)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+ do_pad = true;
+ CMD_ARGC--;
+ CMD_ARGV++;
+ /* FALL THROUGH */
+ case 2:
+ COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], address);
+ COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], length);
+ break;
+ default:
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");
@@ -229,7 +244,7 @@ COMMAND_HANDLER(handle_flash_erase_address_command)
struct duration bench;
duration_start(&bench);
- retval = flash_erase_address_range(target, address, length);
+ retval = flash_erase_address_range(target, do_pad, address, length);
if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
{
@@ -698,9 +713,12 @@ static const struct command_registration flash_exec_command_handlers[] = {
.name = "erase_address",
.handler = handle_flash_erase_address_command,
.mode = COMMAND_EXEC,
- .usage = "address length",
- .help = "Erase flash blocks starting at address "
- "and continuing for length bytes.",
+ .usage = "['pad'] address length",
+ .help = "Erase flash sectors starting at address and "
+ "continuing for length bytes. If 'pad' is specified, "
+ "data outside that range may also be erased: the start "
+ "address may be decreased, and length increased, so "
+ "that all of the first and last sectors are erased.",
},
{
.name = "fillw",
diff --git a/src/server/gdb_server.c b/src/server/gdb_server.c
index 8018e6f9..4191cc2a 100644
--- a/src/server/gdb_server.c
+++ b/src/server/gdb_server.c
@@ -1928,9 +1928,19 @@ int gdb_v_packet(struct connection *connection, struct target *target, char *pac
flash_set_dirty();
/* perform any target specific operations before the erase */
- target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_START);
- result = flash_erase_address_range(gdb_service->target, addr, length);
- target_call_event_callbacks(gdb_service->target, TARGET_EVENT_GDB_FLASH_ERASE_END);
+ target_call_event_callbacks(gdb_service->target,
+ TARGET_EVENT_GDB_FLASH_ERASE_START);
+
+ /* vFlashErase:addr,length messages require region start and
+ * end to be "block" aligned ... if padding is ever needed,
+ * GDB will have become dangerously confused.
+ */
+ result = flash_erase_address_range(gdb_service->target,
+ false, addr, length);
+
+ /* perform any target specific operations after the erase */
+ target_call_event_callbacks(gdb_service->target,
+ TARGET_EVENT_GDB_FLASH_ERASE_END);
/* perform erase */
if (result != ERROR_OK)
generated by cgit v1.2.3 (git 2.46.0) at 2024-12-23 08:01:35 +0000