diff options
Diffstat (limited to 'src/flash/nor')
| -rw-r--r-- | src/flash/nor/stellaris.c | 65 |
1 files changed, 45 insertions, 20 deletions
diff --git a/src/flash/nor/stellaris.c b/src/flash/nor/stellaris.c index 4183cba8..51fe677c 100644 --- a/src/flash/nor/stellaris.c +++ b/src/flash/nor/stellaris.c @@ -748,6 +748,8 @@ static int stellaris_protect(struct flash_bank *bank, int set, int first, int la /* Write commit command */ /* REVISIT safety check, since this cannot be undone * except by the "Recover a locked device" procedure. + * REVISIT DustDevil-A0 parts have an erratum making FMPPE commits + * inadvisable ... it makes future mass erase operations fail. */ LOG_WARNING("Flash protection cannot be removed once commited, commit is NOT executed !"); /* target_write_u32(target, FLASH_FMC, FMC_WRKEY | FMC_COMT); */ @@ -823,37 +825,47 @@ static int stellaris_write_block(struct flash_bank *bank, struct armv7m_algorithm armv7m_info; int retval = ERROR_OK; + /* power of two, and multiple of word size */ + static const unsigned buf_min = 32; + + /* for small buffers it's faster not to download an algorithm */ + if (wcount < buf_min) + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + LOG_DEBUG("(bank=%p buffer=%p offset=%08" PRIx32 " wcount=%08" PRIx32 "", bank, buffer, offset, wcount); /* flash write code */ if (target_alloc_working_area(target, sizeof(stellaris_write_code), &write_algorithm) != ERROR_OK) { - LOG_WARNING("no working area available, can't do block memory writes"); + LOG_DEBUG("no working area for block memory writes"); return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; }; - target_write_buffer(target, write_algorithm->address, - sizeof(stellaris_write_code), - (uint8_t *) stellaris_write_code); + /* plus a buffer big enough for this data */ + if (wcount < buffer_size) { + buffer_size = wcount; + buffer_size += buf_min - 1; + buffer_size &= ~(buf_min - 1); + } /* memory buffer */ while (target_alloc_working_area(target, buffer_size, &source) != ERROR_OK) { - LOG_DEBUG("called target_alloc_working_area(target=%p buffer_size=%08" PRIx32 " source=%p)", - target, buffer_size, source); buffer_size /= 2; - if (buffer_size <= 256) + if (buffer_size <= buf_min) { - /* if we already allocated the writing code, but failed to get a buffer, free the algorithm */ - if (write_algorithm) - target_free_working_area(target, write_algorithm); - - LOG_WARNING("no large enough working area available, can't do block memory writes"); + target_free_working_area(target, write_algorithm); return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; } + LOG_DEBUG("retry target_alloc_working_area(%s, size=%u)", + target_name(target), (unsigned) buffer_size); }; + retval = target_write_buffer(target, write_algorithm->address, + sizeof(stellaris_write_code), + (uint8_t *) stellaris_write_code); + armv7m_info.common_magic = ARMV7M_COMMON_MAGIC; armv7m_info.core_mode = ARMV7M_MODE_ANY; @@ -870,11 +882,20 @@ static int stellaris_write_block(struct flash_bank *bank, buf_set_u32(reg_params[0].value, 0, 32, source->address); buf_set_u32(reg_params[1].value, 0, 32, address); buf_set_u32(reg_params[2].value, 0, 32, 4*thisrun_count); - LOG_INFO("Algorithm flash write %" PRIi32 " words to 0x%" PRIx32 ", %" PRIi32 " remaining", thisrun_count, address, (wcount - thisrun_count)); - LOG_DEBUG("Algorithm flash write %" PRIi32 " words to 0x%" PRIx32 ", %" PRIi32 " remaining", thisrun_count, address, (wcount - thisrun_count)); - if ((retval = target_run_algorithm(target, 0, NULL, 3, reg_params, write_algorithm->address, write_algorithm->address + sizeof(stellaris_write_code)-10, 10000, &armv7m_info)) != ERROR_OK) + LOG_DEBUG("Algorithm flash write %u words to 0x%" PRIx32 + ", %u remaining", + (unsigned) thisrun_count, address, + (unsigned) (wcount - thisrun_count)); + retval = target_run_algorithm(target, 0, NULL, 3, reg_params, + write_algorithm->address, + write_algorithm->address + + sizeof(stellaris_write_code) - 10, + 10000, &armv7m_info); + if (retval != ERROR_OK) { - LOG_ERROR("error executing stellaris flash write algorithm"); + LOG_ERROR("error %d executing stellaris " + "flash write algorithm", + retval); retval = ERROR_FLASH_OPERATION_FAILED; break; } @@ -884,6 +905,10 @@ static int stellaris_write_block(struct flash_bank *bank, wcount -= thisrun_count; } + /* REVISIT we could speed up writing multi-section images by + * not freeing the initialized write_algorithm this way. + */ + target_free_working_area(target, write_algorithm); target_free_working_area(target, source); @@ -942,13 +967,13 @@ static int stellaris_write(struct flash_bank *bank, uint8_t *buffer, uint32_t of if (words_remaining > 0) { /* try using a block write */ - if ((retval = stellaris_write_block(bank, buffer, offset, words_remaining)) != ERROR_OK) + retval = stellaris_write_block(bank, buffer, offset, + words_remaining); + if (retval != ERROR_OK) { if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE) { - /* if block write failed (no sufficient working area), - * we use normal (slow) single dword accesses */ - LOG_WARNING("couldn't use block writes, falling back to single memory accesses"); + LOG_DEBUG("writing flash word-at-a-time"); } else if (retval == ERROR_FLASH_OPERATION_FAILED) { |