flash/nor/stm32f2x: Fix erase of bank 2 sectors

This commit corrects the erase function for stm32f2x when dealing with
sectors in bank 2, for STM32F42x/43x devices with 1MB flash.

On STM32F42x/43x with 1MB flash in dual bank configuration, the sector
numbering is not consecutive. The last sector in bank 1 is number 7, and
the first sector in bank 2 is number 12.
The sector indices used by openocd, however, _are_ consecutive (0 to 15
in this case). The arguments "first" and "last" to stm32x_erase() are of
this type, and so the logic surrounding sector numbers needed to be
corrected.
Since the two banks in dual bank mode have the same number of sectors, a
sector index in bank 2 is larger than or equal to half the total number
of sectors.

Change-Id: I15260f8a86d9002769a1ae1c40ebdf62142dae18
Signed-off-by: Simon Johansson <ampleyfly@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6810
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>

diff --git a/src/flash/nor/stm32f2x.c b/src/flash/nor/stm32f2x.c
index d3e7d709c8695e58a40645c91643a28bd4d2cac1..aa0363232e55082799198eb66ecedba41c79a42a 100644 (file)
--- a/src/flash/nor/stm32f2x.c
+++ b/src/flash/nor/stm32f2x.c
@@ -636,8 +636,8 @@ static int stm32x_erase(struct flash_bank *bank, unsigned int first,
 
        for (unsigned int i = first; i <= last; i++) {
                unsigned int snb;
-               if (stm32x_info->has_large_mem && i >= 12)
-                       snb = (i - 12) | 0x10;
+               if (stm32x_info->has_large_mem && i >= (bank->num_sectors / 2))
+                       snb = (i - (bank->num_sectors / 2)) | 0x10;
                else
                        snb = i;