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 <[email protected]>

Author: nordicjm

boot/bootutil/src/swap_move.c

@@ -298,6 +298,19 @@ boot_slots_compatible(struct boot_loader_state *state)
         }
     }
 
+#ifdef MCUBOOT_SLOT0_EXPECTED_ERASE_SIZE
+    if (sector_sz_pri != MCUBOOT_SLOT0_EXPECTED_ERASE_SIZE) {
+        BOOT_LOG_DBG("Discrepancy, slot0 expected erase size: %d, actual: %d",
+                     MCUBOOT_SLOT0_EXPECTED_ERASE_SIZE, sector_sz_pri);
+    }
+#endif
+#ifdef MCUBOOT_SLOT1_EXPECTED_ERASE_SIZE
+    if (sector_sz_sec != MCUBOOT_SLOT1_EXPECTED_ERASE_SIZE) {
+        BOOT_LOG_DBG("Discrepancy, slot1 expected erase size: %d, actual: %d",
+                     MCUBOOT_SLOT1_EXPECTED_ERASE_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

@@ -375,13 +375,29 @@ 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_ERASE_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 "${slot1_flash}" PROPERTY "erase-block-size")
+
+  if(CONFIG_BOOT_SWAP_USING_MOVE AND DEFINED erase_size_slot1)
+    zephyr_compile_definitions("MCUBOOT_SLOT1_EXPECTED_ERASE_SIZE=${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)
@@ -391,12 +407,6 @@ 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)