boot: zephyr: Add check for unexpected flash sector size

Prints a debug log message if the device has a write block size
for a flash device in DTS that is not the same as what the flash
driver reports at run-time, this can be used to see if there is
a faulty configuration as these compile-time values are used for
various calculations

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>

boot/bootutil/src/swap_move.c

@@ -298,6 +298,19 @@ boot_slots_compatible(struct boot_loader_state *state)
  }
  }
 
+#ifdef MCUBOOT_SLOT0_EXPECTED_SECTOR_SIZE
+ if (sector_sz_pri != MCUBOOT_SLOT0_EXPECTED_SECTOR_SIZE) {
+ BOOT_LOG_DBG("Discrepancy, slot0 expected sector size: %d, actual: %d"
+ MCUBOOT_SLOT0_EXPECTED_SECTOR_SIZE, sector_sz_pri);
+ }
+#endif
+#ifdef MCUBOOT_SLOT1_EXPECTED_SECTOR_SIZE
+ if (sector_sz_sec != MCUBOOT_SLOT1_EXPECTED_SECTOR_SIZE) {
+ BOOT_LOG_DBG("Discrepancy, slot1 expected sector size: %d, actual: %d"
+ MCUBOOT_SLOT1_EXPECTED_SECTOR_SIZE, sector_sz_sec);
+ }
+#endif
+
  if (num_sectors_pri > num_sectors_sec) {
  if (sector_sz_pri != boot_img_sector_size(state, BOOT_PRIMARY_SLOT, i)) {
  BOOT_LOG_WRN("Cannot upgrade: not same sector layout");

boot/zephyr/CMakeLists.txt

@@ -379,13 +379,29 @@ function(dt_get_parent node)
  set(${node} "${${node}}" PARENT_SCOPE)
 endfunction()
 
-if(CONFIG_BOOT_MAX_IMG_SECTORS_AUTO)
- dt_nodelabel(slot0_flash NODELABEL "slot0_partition")
- dt_prop(slot0_size PATH "${slot0_flash}" PROPERTY "reg" INDEX 1)
- dt_get_parent(slot0_flash)
- dt_get_parent(slot0_flash)
- dt_prop(erase_size_slot0 PATH "${slot0_flash}" PROPERTY "erase-block-size")
+dt_nodelabel(slot0_flash NODELABEL "slot0_partition")
+dt_prop(slot0_size PATH "${slot0_flash}" PROPERTY "reg" INDEX 1)
+dt_get_parent(slot0_flash)
+dt_get_parent(slot0_flash)
+dt_prop(erase_size_slot0 PATH "${slot0_flash}" PROPERTY "erase-block-size")
+
+if(CONFIG_BOOT_SWAP_USING_MOVE AND DEFINED erase_size_slot0)
+ zephyr_compile_definitions("MCUBOOT_SLOT0_EXPECTED_SECTOR_SIZE=${erase_size_slot0}")
+endif()
+
+if(NOT CONFIG_SINGLE_APPLICATION_SLOT)
+ dt_nodelabel(slot1_flash NODELABEL "slot1_partition")
+ dt_prop(slot1_size PATH "${slot1_flash}" PROPERTY "reg" INDEX 1)
+ dt_get_parent(slot1_flash)
+ dt_get_parent(slot1_flash)
+ dt_prop(erase_size_slot1 PATH "${slot1_flash}" PROPERTY "erase-block-size")
+
+ if(CONFIG_BOOT_SWAP_USING_MOVE AND DEFINED erase_size_slot1)
+ zephyr_compile_definitions("MCUBOOT_SLOT1_EXPECTED_SECTOR_SIZE=${erase_size_slot1}")
+ endif()
+endif()
 
+if(CONFIG_BOOT_MAX_IMG_SECTORS_AUTO)
  if(NOT DEFINED slot0_size)
  message(WARNING "Unable to determine size of slot0 partition, cannot calculate minimum sector usage")
  elseif(NOT DEFINED erase_size_slot0)
@@ -395,12 +411,6 @@ if(CONFIG_BOOT_MAX_IMG_SECTORS_AUTO)
  endif()
 
  if(NOT CONFIG_SINGLE_APPLICATION_SLOT)
- dt_nodelabel(slot1_flash NODELABEL "slot1_partition")
- dt_prop(slot1_size PATH "${slot1_flash}" PROPERTY "reg" INDEX 1)
- dt_get_parent(slot1_flash)
- dt_get_parent(slot1_flash)
- dt_prop(erase_size_slot1 PATH "${slot1_flash}" PROPERTY "erase-block-size")
-
  if(NOT DEFINED slot1_size)
  message(WARNING "Unable to determine size of slot1 partition, cannot calculate minimum sector usage")
  elseif(NOT DEFINED erase_size_slot1)