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flash/stm32h7x: don't read flash size using the H74/H75x CPU2 

CPU2 (Cortex-M4) cannot read flash size register.
assume the maximum flash size without triggering an error message

Change-Id: I5c3328b7cc42e3aa57165075021227d7936f3d26
Signed-off-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6670
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
Tarek BOCHKATI 2021-10-20 12:13:01 +01:00 committed by Antonio Borneo
parent 50f977b058
commit 9d574aa3fa
1 changed files with 11 additions and 6 deletions
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17
src/flash/nor/stm32h7x.c
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@ -21,7 +21,7 @@
#include "imp.h"
#include <helper/binarybuffer.h>
#include <target/algorithm.h>
#include <target/armv7m.h>
#include <target/cortex_m.h>
/* Erase time can be as high as 1000ms, 10x this and it's toast... */
@ -759,6 +759,7 @@ static int stm32x_read_id_code(struct flash_bank *bank, uint32_t *id)
static int stm32x_probe(struct flash_bank *bank)
{
struct target *target = bank->target;
struct cortex_m_common *cortex_m = target_to_cm(target);
struct stm32h7x_flash_bank *stm32x_info = bank->driver_priv;
uint16_t flash_size_in_kb;
uint32_t device_id;
@ -797,15 +798,19 @@ static int stm32x_probe(struct flash_bank *bank)
LOG_DEBUG("flash_regs_base: 0x%" PRIx32, stm32x_info->flash_regs_base);
/* get flash size from target */
retval = target_read_u16(target, stm32x_info->part_info->fsize_addr, &flash_size_in_kb);
/* STM32H74x/H75x, the second core (Cortex-M4) cannot read the flash size */
retval = ERROR_FAIL;
if (device_id == DEVID_STM32H74_H75XX && cortex_m->core_info->partno == CORTEX_M4_PARTNO)
LOG_WARNING("%s cannot read the flash size register", target_name(target));
else
retval = target_read_u16(target, stm32x_info->part_info->fsize_addr, &flash_size_in_kb);
if (retval != ERROR_OK) {
/* read error when device has invalid value, set max flash size */
flash_size_in_kb = stm32x_info->part_info->max_flash_size_kb;
LOG_INFO("assuming %" PRIu16 "k flash", flash_size_in_kb);
} else
LOG_INFO("flash size probed value %" PRIu16, flash_size_in_kb);
LOG_INFO("flash size probed value %" PRIu16 "k", flash_size_in_kb);
/* setup bank size */
const uint32_t bank1_base = FLASH_BANK0_ADDRESS;