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stm32l4: Build Memory Map during attach. 

Reading target registers while target not halted may fail and result in
invalid memory map.
This commit is contained in:
Uwe Bonnes 2018-04-15 17:39:30 +02:00 committed by Gareth McMullin
parent 5f404cdbc0
commit a0596a0dcc
1 changed files with 30 additions and 11 deletions
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41
src/target/stm32l4.c
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@ -142,46 +142,65 @@ static void stm32l4_add_flash(target *t,
target_add_flash(t, f);
}
static bool stm32l4_attach(target *t);
bool stm32l4_probe(target *t)
{
uint32_t idcode;
uint32_t size;
uint32_t options;
uint32_t bank1_start = 0x08040000;
idcode = target_mem_read32(t, DBGMCU_IDCODE) & 0xFFF;
switch(idcode) {
case 0x461: /* L496/RM0351 */
case 0x415: /* L471/RM0392, L475/RM0395, L476/RM0351 */
case 0x462: /* L45x L46x / RM0394 */
case 0x435: /* L43x L44x / RM0394 */
t->idcode = idcode;
t->driver = "STM32L4";
t->attach = stm32l4_attach;
target_add_commands(t, stm32l4_cmd_list, "STM32L4");
return true;
default:
return false;
}
}
static bool stm32l4_attach(target *t)
{
uint32_t size = (target_mem_read32(t, FLASH_SIZE_REG) & 0xffff);
uint32_t bank1_start = 0x08080000; /* default split on 1MiB devices*/
if (!cortexm_attach(t))
return false;
target_mem_map_free(t);
switch(t->idcode) {
case 0x461: /* L496/RM0351 */
case 0x415: /* L471/RM0392, L475/RM0395, L476/RM0351 */
t->driver = stm32l4_driver_str;
if (idcode == 0x415) {
if (t->idcode == 0x415) {
target_add_ram(t, 0x10000000, 0x08000);
target_add_ram(t, 0x20000000, 0x18000);
} else {
target_add_ram(t, 0x10000000, 0x10000);
target_add_ram(t, 0x20000000, 0x40000);
}
size = (target_mem_read32(t, FLASH_SIZE_REG) & 0xffff);
options = target_mem_read32(t, FLASH_OPTR);
uint32_t options = target_mem_read32(t, FLASH_OPTR);
/* Only 256 and 512 kiB devices evaluate OR_DUALBANK*/
if ((size < 0x400) && (options & OR_DUALBANK))
bank1_start = 0x08000000 + (size << 9);
stm32l4_add_flash(t, 0x08000000, size << 10, PAGE_SIZE, bank1_start);
target_add_commands(t, stm32l4_cmd_list, "STM32L4 Dual bank");
return true;
case 0x462: /* L45x L46x / RM0394 */
case 0x435: /* L43x L44x / RM0394 */
t->driver = stm32l4_driver_str;
if (idcode == 0x452) {
if (t->idcode == 0x452) {
target_add_ram(t, 0x10000000, 0x08000);
target_add_ram(t, 0x20000000, 0x20000);
} else {
target_add_ram(t, 0x10000000, 0x04000);
target_add_ram(t, 0x20000000, 0x0c000);
}
size = (target_mem_read32(t, FLASH_SIZE_REG) & 0xffff);
options = target_mem_read32(t, FLASH_OPTR);
stm32l4_add_flash(t, 0x08000000, size << 10, PAGE_SIZE, bank1_start);
target_add_commands(t, stm32l4_cmd_list, "STM32L4");
return true;
}
return false;