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target, flash: prepare infrastructure for multi-block blank check

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'flash erase_check' command runs a check algorithm on a target
if possible. The algorithm is run repeatedly for each flash sector.
Unfortunately every start and stop of the algorithm impose not negligible
overhead.
In practice it means checking is faster than plain read only for
sectors of size approx 4 kByte or bigger. And checking sectors
as short as 512 bytes runs approx 4 times slower than plain read.

The patch changes API call target_blank_check_memory() and related
to take an array of sectors (or arbitrary memory blocks).

Changes in target-specific checking routines are kept minimal.
They use only the first block from the array and process it by
the unchanged algorithm.

default_flash_blank_check() routine repeats target_blank_check_memory()
until all blocks are checked, so it works with both multi-block
and single-block based checkers.

Change-Id: I0e6c60f2d71364c9c07c09416b04de9268807f5e
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/4297
Tested-by: jenkins
Reviewed-by: Andreas Bolsch <hyphen0break@gmail.com>
This commit is contained in:
Tomas Vanek
2017-11-23 09:18:24 +01:00
parent f00d9bb1d7
commit eb8912ec38
12 changed files with 83 additions and 96 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
src/flash/nor/at91sam7.c
View File

@@ -639,14 +639,6 @@ static int at91sam7_read_part_info(struct flash_bank *bank)
static int at91sam7_erase_check(struct flash_bank *bank)
{
struct target *target = bank->target;
uint16_t retval;
uint32_t blank;
uint16_t fast_check;
uint8_t *buffer;
uint16_t nSector;
uint16_t nByte;
if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
@@ -656,45 +648,7 @@ static int at91sam7_erase_check(struct flash_bank *bank)
at91sam7_read_clock_info(bank);
at91sam7_set_flash_mode(bank, FMR_TIMING_FLASH);
fast_check = 1;
for (nSector = 0; nSector < bank->num_sectors; nSector++) {
retval = target_blank_check_memory(target,
bank->base + bank->sectors[nSector].offset,
bank->sectors[nSector].size,
&blank, bank->erased_value);
if (retval != ERROR_OK) {
fast_check = 0;
break;
}
if (blank == 0xFF)
bank->sectors[nSector].is_erased = 1;
else
bank->sectors[nSector].is_erased = 0;
}
if (fast_check)
return ERROR_OK;
LOG_USER("Running slow fallback erase check - add working memory");
buffer = malloc(bank->sectors[0].size);
for (nSector = 0; nSector < bank->num_sectors; nSector++) {
bank->sectors[nSector].is_erased = 1;
retval = target_read_memory(target, bank->base + bank->sectors[nSector].offset, 4,
bank->sectors[nSector].size/4, buffer);
if (retval != ERROR_OK)
return retval;
for (nByte = 0; nByte < bank->sectors[nSector].size; nByte++) {
if (buffer[nByte] != 0xFF) {
bank->sectors[nSector].is_erased = 0;
break;
}
}
}
free(buffer);
return ERROR_OK;
return default_flash_blank_check(bank);
}
static int at91sam7_protect_check(struct flash_bank *bank)