From cea40152f82f52bfc718c7bda9fa4a9d70bf9cfd Mon Sep 17 00:00:00 2001 From: Dominik Peklo Date: Thu, 12 Jul 2018 20:44:28 +1000 Subject: [PATCH] flash/nor/stm32f1x: Use of protection blocks, improved option bytes handling MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Handle write protection status in blocks instead of sectors, removing unnecessary complexity in the process. Now closer to stm32f2x. Support sequential modification of option bytes by read/modify/write directly to option bytes area instead of always starting with the currently loaded bytes from FLASH_OBR/WRPR registers. Added new command 'options_load' to force re-load of option bytes w/o having to power cycle target. Change-Id: I5c76191e29c17a1e11482df06379d10ca8d6d04d Signed-off-by: Dominik Peklo Signed-off-by: Tomas Vanek Reviewed-on: http://openocd.zylin.com/4576 Tested-by: jenkins Reviewed-by: Jan Vojtěch --- doc/openocd.texi | 18 +- src/flash/nor/stm32f1x.c | 397 ++++++++++++++++++--------------------- 2 files changed, 192 insertions(+), 223 deletions(-) diff --git a/doc/openocd.texi b/doc/openocd.texi index 77c9ff7b..ac81b35e 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -6429,23 +6429,24 @@ flash bank $_FLASHNAME stm32f1x 0x08080000 0 0 0 $_TARGETNAME Some stm32f1x-specific commands are defined: @deffn Command {stm32f1x lock} num -Locks the entire stm32 device. +Locks the entire stm32 device against reading. The @var{num} parameter is a value shown by @command{flash banks}. @end deffn @deffn Command {stm32f1x unlock} num -Unlocks the entire stm32 device. +Unlocks the entire stm32 device for reading. This command will cause +a mass erase of the entire stm32 device if previously locked. The @var{num} parameter is a value shown by @command{flash banks}. @end deffn @deffn Command {stm32f1x mass_erase} num -Mass erases the entire stm32f1x device. +Mass erases the entire stm32 device. The @var{num} parameter is a value shown by @command{flash banks}. @end deffn @deffn Command {stm32f1x options_read} num -Read and display the stm32 option bytes written by -the @command{stm32f1x options_write} command. +Reads and displays active stm32 option bytes loaded during POR +or upon executing the @command{stm32f1x options_load} command. The @var{num} parameter is a value shown by @command{flash banks}. @end deffn @@ -6453,6 +6454,13 @@ The @var{num} parameter is a value shown by @command{flash banks}. Writes the stm32 option byte with the specified values. The @var{num} parameter is a value shown by @command{flash banks}. @end deffn + +@deffn Command {stm32f1x options_load} num +Generates a special kind of reset to re-load the stm32 option bytes written +by the @command{stm32f1x options_write} or @command{flash protect} commands +without having to power cycle the target. Not applicable to stm32f1x devices. +The @var{num} parameter is a value shown by @command{flash banks}. +@end deffn @end deffn @deffn {Flash Driver} stm32f2x diff --git a/src/flash/nor/stm32f1x.c b/src/flash/nor/stm32f1x.c index faada9a6..fbd75982 100644 --- a/src/flash/nor/stm32f1x.c +++ b/src/flash/nor/stm32f1x.c @@ -70,14 +70,15 @@ /* FLASH_CR register bits */ -#define FLASH_PG (1 << 0) -#define FLASH_PER (1 << 1) -#define FLASH_MER (1 << 2) -#define FLASH_OPTPG (1 << 4) -#define FLASH_OPTER (1 << 5) -#define FLASH_STRT (1 << 6) -#define FLASH_LOCK (1 << 7) -#define FLASH_OPTWRE (1 << 9) +#define FLASH_PG (1 << 0) +#define FLASH_PER (1 << 1) +#define FLASH_MER (1 << 2) +#define FLASH_OPTPG (1 << 4) +#define FLASH_OPTER (1 << 5) +#define FLASH_STRT (1 << 6) +#define FLASH_LOCK (1 << 7) +#define FLASH_OPTWRE (1 << 9) +#define FLASH_OBL_LAUNCH (1 << 13) /* except stm32f1x series */ /* FLASH_SR register bits */ @@ -106,10 +107,10 @@ #define FLASH_ERASE_TIMEOUT 100 struct stm32x_options { - uint16_t RDP; - uint16_t user_options; - uint16_t user_data; - uint16_t protection[4]; + uint8_t rdp; + uint8_t user; + uint16_t data; + uint32_t protection; }; struct stm32x_flash_bank { @@ -119,8 +120,9 @@ struct stm32x_flash_bank { bool has_dual_banks; /* used to access dual flash bank stm32xl */ + bool can_load_options; uint32_t register_base; - uint16_t default_rdp; + uint8_t default_rdp; int user_data_offset; int option_offset; uint32_t user_bank_size; @@ -145,6 +147,7 @@ FLASH_BANK_COMMAND_HANDLER(stm32x_flash_bank_command) bank->driver_priv = stm32x_info; stm32x_info->probed = 0; stm32x_info->has_dual_banks = false; + stm32x_info->can_load_options = false; stm32x_info->register_base = FLASH_REG_BASE_B0; stm32x_info->user_bank_size = bank->size; @@ -221,44 +224,47 @@ static int stm32x_check_operation_supported(struct flash_bank *bank) static int stm32x_read_options(struct flash_bank *bank) { - uint32_t optiondata; - struct stm32x_flash_bank *stm32x_info = NULL; + struct stm32x_flash_bank *stm32x_info = bank->driver_priv; struct target *target = bank->target; + uint32_t option_bytes; + int retval; - stm32x_info = bank->driver_priv; + /* read user and read protection option bytes */ + retval = target_read_u32(target, STM32_OB_RDP, &option_bytes); + if (retval != ERROR_OK) + return retval; - /* read current option bytes */ - int retval = target_read_u32(target, STM32_FLASH_OBR_B0, &optiondata); + stm32x_info->option_bytes.rdp = option_bytes & 0xFF; + stm32x_info->option_bytes.user = (option_bytes >> 16) & 0xFF; + + /* read user data option bytes */ + retval = target_read_u32(target, STM32_OB_DATA0, &option_bytes); if (retval != ERROR_OK) return retval; - stm32x_info->option_bytes.user_options = (optiondata >> stm32x_info->option_offset >> 2) & 0xffff; - stm32x_info->option_bytes.user_data = (optiondata >> stm32x_info->user_data_offset) & 0xffff; - stm32x_info->option_bytes.RDP = (optiondata & (1 << OPT_READOUT)) ? 0xFFFF : 0x5AA5; + stm32x_info->option_bytes.data = ((option_bytes >> 8) & 0xFF00) | (option_bytes & 0xFF); + + /* read write protection option bytes */ + retval = target_read_u32(target, STM32_OB_WRP0, &option_bytes); + if (retval != ERROR_OK) + return retval; - if (optiondata & (1 << OPT_READOUT)) - LOG_INFO("Device Security Bit Set"); + stm32x_info->option_bytes.protection = ((option_bytes >> 8) & 0xFF00) | (option_bytes & 0xFF); - /* each bit refers to a 4bank protection */ - retval = target_read_u32(target, STM32_FLASH_WRPR_B0, &optiondata); + retval = target_read_u32(target, STM32_OB_WRP2, &option_bytes); if (retval != ERROR_OK) return retval; - stm32x_info->option_bytes.protection[0] = (uint16_t)optiondata; - stm32x_info->option_bytes.protection[1] = (uint16_t)(optiondata >> 8); - stm32x_info->option_bytes.protection[2] = (uint16_t)(optiondata >> 16); - stm32x_info->option_bytes.protection[3] = (uint16_t)(optiondata >> 24); + stm32x_info->option_bytes.protection |= (((option_bytes >> 8) & 0xFF00) | (option_bytes & 0xFF)) << 16; return ERROR_OK; } static int stm32x_erase_options(struct flash_bank *bank) { - struct stm32x_flash_bank *stm32x_info = NULL; + struct stm32x_flash_bank *stm32x_info = bank->driver_priv; struct target *target = bank->target; - stm32x_info = bank->driver_priv; - /* read current options */ stm32x_read_options(bank); @@ -291,9 +297,9 @@ static int stm32x_erase_options(struct flash_bank *bank) if (retval != ERROR_OK) return retval; - /* clear readout protection and complementary option bytes + /* clear read protection option byte * this will also force a device unlock if set */ - stm32x_info->option_bytes.RDP = stm32x_info->default_rdp; + stm32x_info->option_bytes.rdp = stm32x_info->default_rdp; return ERROR_OK; } @@ -328,14 +334,14 @@ static int stm32x_write_options(struct flash_bank *bank) uint8_t opt_bytes[16]; - target_buffer_set_u16(target, opt_bytes, stm32x_info->option_bytes.RDP); - target_buffer_set_u16(target, opt_bytes + 2, stm32x_info->option_bytes.user_options); - target_buffer_set_u16(target, opt_bytes + 4, stm32x_info->option_bytes.user_data & 0xff); - target_buffer_set_u16(target, opt_bytes + 6, (stm32x_info->option_bytes.user_data >> 8) & 0xff); - target_buffer_set_u16(target, opt_bytes + 8, stm32x_info->option_bytes.protection[0]); - target_buffer_set_u16(target, opt_bytes + 10, stm32x_info->option_bytes.protection[1]); - target_buffer_set_u16(target, opt_bytes + 12, stm32x_info->option_bytes.protection[2]); - target_buffer_set_u16(target, opt_bytes + 14, stm32x_info->option_bytes.protection[3]); + target_buffer_set_u16(target, opt_bytes, stm32x_info->option_bytes.rdp); + target_buffer_set_u16(target, opt_bytes + 2, stm32x_info->option_bytes.user); + target_buffer_set_u16(target, opt_bytes + 4, stm32x_info->option_bytes.data & 0xff); + target_buffer_set_u16(target, opt_bytes + 6, (stm32x_info->option_bytes.data >> 8) & 0xff); + target_buffer_set_u16(target, opt_bytes + 8, stm32x_info->option_bytes.protection & 0xff); + target_buffer_set_u16(target, opt_bytes + 10, (stm32x_info->option_bytes.protection >> 8) & 0xff); + target_buffer_set_u16(target, opt_bytes + 12, (stm32x_info->option_bytes.protection >> 16) & 0xff); + target_buffer_set_u16(target, opt_bytes + 14, (stm32x_info->option_bytes.protection >> 24) & 0xff); uint32_t offset = STM32_OB_RDP - bank->base; retval = stm32x_write_block(bank, opt_bytes, offset, sizeof(opt_bytes) / 2); @@ -355,64 +361,21 @@ static int stm32x_write_options(struct flash_bank *bank) static int stm32x_protect_check(struct flash_bank *bank) { struct target *target = bank->target; - struct stm32x_flash_bank *stm32x_info = bank->driver_priv; - uint32_t protection; - int i, s; - int num_bits; - int set; int retval = stm32x_check_operation_supported(bank); if (ERROR_OK != retval) return retval; - /* medium density - each bit refers to a 4bank protection - * high density - each bit refers to a 2bank protection */ + /* medium density - each bit refers to a 4 sector protection block + * high density - each bit refers to a 2 sector protection block + * bit 31 refers to all remaining sectors in a bank */ retval = target_read_u32(target, STM32_FLASH_WRPR_B0, &protection); if (retval != ERROR_OK) return retval; - /* medium density - each protection bit is for 4 * 1K pages - * high density - each protection bit is for 2 * 2K pages */ - num_bits = (bank->num_sectors / stm32x_info->ppage_size); - - if (stm32x_info->ppage_size == 2) { - /* high density flash/connectivity line protection */ - - set = 1; - - if (protection & (1 << 31)) - set = 0; - - /* bit 31 controls sector 62 - 255 protection for high density - * bit 31 controls sector 62 - 127 protection for connectivity line */ - for (s = 62; s < bank->num_sectors; s++) - bank->sectors[s].is_protected = set; - - if (bank->num_sectors > 61) - num_bits = 31; - - for (i = 0; i < num_bits; i++) { - set = 1; - - if (protection & (1 << i)) - set = 0; - - for (s = 0; s < stm32x_info->ppage_size; s++) - bank->sectors[(i * stm32x_info->ppage_size) + s].is_protected = set; - } - } else { - /* low/medium density flash protection */ - for (i = 0; i < num_bits; i++) { - set = 1; - - if (protection & (1 << i)) - set = 0; - - for (s = 0; s < stm32x_info->ppage_size; s++) - bank->sectors[(i * stm32x_info->ppage_size) + s].is_protected = set; - } - } + for (int i = 0; i < bank->num_prot_blocks; i++) + bank->prot_blocks[i].is_protected = (protection & (1 << i)) ? 0 : 1; return ERROR_OK; } @@ -467,14 +430,8 @@ static int stm32x_erase(struct flash_bank *bank, int first, int last) static int stm32x_protect(struct flash_bank *bank, int set, int first, int last) { - struct stm32x_flash_bank *stm32x_info = NULL; struct target *target = bank->target; - uint16_t prot_reg[4] = {0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF}; - int i, reg, bit; - int status; - uint32_t protection; - - stm32x_info = bank->driver_priv; + struct stm32x_flash_bank *stm32x_info = bank->driver_priv; if (target->state != TARGET_HALTED) { LOG_ERROR("Target not halted"); @@ -482,80 +439,20 @@ static int stm32x_protect(struct flash_bank *bank, int set, int first, int last) } int retval = stm32x_check_operation_supported(bank); - if (ERROR_OK != retval) + if (retval != ERROR_OK) return retval; - if ((first % stm32x_info->ppage_size) != 0) { - LOG_WARNING("aligned start protect sector to a %d sector boundary", - stm32x_info->ppage_size); - first = first - (first % stm32x_info->ppage_size); - } - if (((last + 1) % stm32x_info->ppage_size) != 0) { - LOG_WARNING("aligned end protect sector to a %d sector boundary", - stm32x_info->ppage_size); - last++; - last = last - (last % stm32x_info->ppage_size); - last--; - } - - /* medium density - each bit refers to a 4bank protection - * high density - each bit refers to a 2bank protection */ - retval = target_read_u32(target, STM32_FLASH_WRPR_B0, &protection); + retval = stm32x_erase_options(bank); if (retval != ERROR_OK) return retval; - prot_reg[0] = (uint16_t)protection; - prot_reg[1] = (uint16_t)(protection >> 8); - prot_reg[2] = (uint16_t)(protection >> 16); - prot_reg[3] = (uint16_t)(protection >> 24); - - if (stm32x_info->ppage_size == 2) { - /* high density flash */ - - /* bit 7 controls sector 62 - 255 protection */ - if (last > 61) { - if (set) - prot_reg[3] &= ~(1 << 7); - else - prot_reg[3] |= (1 << 7); - } - - if (first > 61) - first = 62; - if (last > 61) - last = 61; - - for (i = first; i <= last; i++) { - reg = (i / stm32x_info->ppage_size) / 8; - bit = (i / stm32x_info->ppage_size) - (reg * 8); - - if (set) - prot_reg[reg] &= ~(1 << bit); - else - prot_reg[reg] |= (1 << bit); - } - } else { - /* medium density flash */ - for (i = first; i <= last; i++) { - reg = (i / stm32x_info->ppage_size) / 8; - bit = (i / stm32x_info->ppage_size) - (reg * 8); - - if (set) - prot_reg[reg] &= ~(1 << bit); - else - prot_reg[reg] |= (1 << bit); - } + for (int i = first; i <= last; i++) { + if (set) + stm32x_info->option_bytes.protection &= ~(1 << i); + else + stm32x_info->option_bytes.protection |= (1 << i); } - status = stm32x_erase_options(bank); - if (status != ERROR_OK) - return status; - - stm32x_info->option_bytes.protection[0] = prot_reg[0]; - stm32x_info->option_bytes.protection[1] = prot_reg[1]; - stm32x_info->option_bytes.protection[2] = prot_reg[2]; - stm32x_info->option_bytes.protection[3] = prot_reg[3]; - return stm32x_write_options(bank); } @@ -808,7 +705,6 @@ static int stm32x_get_flash_size(struct flash_bank *bank, uint16_t *flash_size_i static int stm32x_probe(struct flash_bank *bank) { struct stm32x_flash_bank *stm32x_info = bank->driver_priv; - int i; uint16_t flash_size_in_kb; uint16_t max_flash_size_in_kb; uint32_t device_id; @@ -820,8 +716,8 @@ static int stm32x_probe(struct flash_bank *bank) stm32x_info->user_data_offset = 10; stm32x_info->option_offset = 0; - /* default factory protection level */ - stm32x_info->default_rdp = 0x5AA5; + /* default factory read protection level 0 */ + stm32x_info->default_rdp = 0xA5; /* read stm32 device id register */ int retval = stm32x_get_device_id(bank, &device_id); @@ -863,7 +759,8 @@ static int stm32x_probe(struct flash_bank *bank) max_flash_size_in_kb = 256; stm32x_info->user_data_offset = 16; stm32x_info->option_offset = 6; - stm32x_info->default_rdp = 0x55AA; + stm32x_info->default_rdp = 0xAA; + stm32x_info->can_load_options = true; break; case 0x446: /* stm32f303xD/E */ page_size = 2048; @@ -871,7 +768,8 @@ static int stm32x_probe(struct flash_bank *bank) max_flash_size_in_kb = 512; stm32x_info->user_data_offset = 16; stm32x_info->option_offset = 6; - stm32x_info->default_rdp = 0x55AA; + stm32x_info->default_rdp = 0xAA; + stm32x_info->can_load_options = true; break; case 0x428: /* value line High density */ page_size = 2048; @@ -890,7 +788,8 @@ static int stm32x_probe(struct flash_bank *bank) max_flash_size_in_kb = 256; stm32x_info->user_data_offset = 16; stm32x_info->option_offset = 6; - stm32x_info->default_rdp = 0x55AA; + stm32x_info->default_rdp = 0xAA; + stm32x_info->can_load_options = true; break; case 0x438: /* stm32f33x */ case 0x439: /* stm32f302x6/8 */ @@ -899,7 +798,8 @@ static int stm32x_probe(struct flash_bank *bank) max_flash_size_in_kb = 64; stm32x_info->user_data_offset = 16; stm32x_info->option_offset = 6; - stm32x_info->default_rdp = 0x55AA; + stm32x_info->default_rdp = 0xAA; + stm32x_info->can_load_options = true; break; case 0x440: /* stm32f05x */ case 0x444: /* stm32f03x */ @@ -909,7 +809,8 @@ static int stm32x_probe(struct flash_bank *bank) max_flash_size_in_kb = 64; stm32x_info->user_data_offset = 16; stm32x_info->option_offset = 6; - stm32x_info->default_rdp = 0x55AA; + stm32x_info->default_rdp = 0xAA; + stm32x_info->can_load_options = true; break; case 0x448: /* stm32f07x */ case 0x442: /* stm32f09x */ @@ -918,7 +819,8 @@ static int stm32x_probe(struct flash_bank *bank) max_flash_size_in_kb = 256; stm32x_info->user_data_offset = 16; stm32x_info->option_offset = 6; - stm32x_info->default_rdp = 0x55AA; + stm32x_info->default_rdp = 0xAA; + stm32x_info->can_load_options = true; break; default: LOG_WARNING("Cannot identify target as a STM32 family."); @@ -972,17 +874,31 @@ static int stm32x_probe(struct flash_bank *bank) bank->sectors = NULL; } + if (bank->prot_blocks) { + free(bank->prot_blocks); + bank->prot_blocks = NULL; + } + bank->base = base_address; bank->size = (num_pages * page_size); + bank->num_sectors = num_pages; - bank->sectors = malloc(sizeof(struct flash_sector) * num_pages); + bank->sectors = alloc_block_array(0, page_size, num_pages); + if (!bank->sectors) + return ERROR_FAIL; - for (i = 0; i < num_pages; i++) { - bank->sectors[i].offset = i * page_size; - bank->sectors[i].size = page_size; - bank->sectors[i].is_erased = -1; - bank->sectors[i].is_protected = 1; - } + /* calculate number of write protection blocks */ + int num_prot_blocks = num_pages / stm32x_info->ppage_size; + if (num_prot_blocks > 32) + num_prot_blocks = 32; + + bank->num_prot_blocks = num_prot_blocks; + bank->prot_blocks = alloc_block_array(0, stm32x_info->ppage_size * page_size, num_prot_blocks); + if (!bank->prot_blocks) + return ERROR_FAIL; + + if (num_prot_blocks == 32) + bank->prot_blocks[31].size = (num_pages - (31 * stm32x_info->ppage_size)) * page_size; stm32x_info->probed = 1; @@ -1275,7 +1191,7 @@ COMMAND_HANDLER(stm32x_handle_lock_command) } /* set readout protection */ - stm32x_info->option_bytes.RDP = 0; + stm32x_info->option_bytes.rdp = 0; if (stm32x_write_options(bank) != ERROR_OK) { command_print(CMD_CTX, "stm32x failed to lock device"); @@ -1329,7 +1245,7 @@ COMMAND_HANDLER(stm32x_handle_unlock_command) COMMAND_HANDLER(stm32x_handle_options_read_command) { - uint32_t optionbyte; + uint32_t optionbyte, protection; struct target *target = NULL; struct stm32x_flash_bank *stm32x_info = NULL; @@ -1357,47 +1273,38 @@ COMMAND_HANDLER(stm32x_handle_options_read_command) retval = target_read_u32(target, STM32_FLASH_OBR_B0, &optionbyte); if (retval != ERROR_OK) return retval; - command_print(CMD_CTX, "Option Byte: 0x%" PRIx32 "", optionbyte); - int user_data = optionbyte; + uint16_t user_data = optionbyte >> stm32x_info->user_data_offset; - if (optionbyte >> OPT_ERROR & 1) - command_print(CMD_CTX, "Option Byte Complement Error"); + retval = target_read_u32(target, STM32_FLASH_WRPR_B0, &protection); + if (retval != ERROR_OK) + return retval; - if (optionbyte >> OPT_READOUT & 1) - command_print(CMD_CTX, "Readout Protection On"); - else - command_print(CMD_CTX, "Readout Protection Off"); + if (optionbyte & (1 << OPT_ERROR)) + command_print(CMD_CTX, "option byte complement error"); + + command_print(CMD_CTX, "option byte register = 0x%" PRIx32 "", optionbyte); + command_print(CMD_CTX, "write protection register = 0x%" PRIx32 "", protection); + + command_print(CMD_CTX, "read protection: %s", + (optionbyte & (1 << OPT_READOUT)) ? "on" : "off"); /* user option bytes are offset depending on variant */ optionbyte >>= stm32x_info->option_offset; - if (optionbyte >> OPT_RDWDGSW & 1) - command_print(CMD_CTX, "Software Watchdog"); - else - command_print(CMD_CTX, "Hardware Watchdog"); + command_print(CMD_CTX, "watchdog: %sware", + (optionbyte & (1 << OPT_RDWDGSW)) ? "soft" : "hard"); - if (optionbyte >> OPT_RDRSTSTOP & 1) - command_print(CMD_CTX, "Stop: No reset generated"); - else - command_print(CMD_CTX, "Stop: Reset generated"); + command_print(CMD_CTX, "stop mode: %sreset generated upon entry", + (optionbyte & (1 << OPT_RDRSTSTOP)) ? "no " : ""); - if (optionbyte >> OPT_RDRSTSTDBY & 1) - command_print(CMD_CTX, "Standby: No reset generated"); - else - command_print(CMD_CTX, "Standby: Reset generated"); + command_print(CMD_CTX, "standby mode: %sreset generated upon entry", + (optionbyte & (1 << OPT_RDRSTSTDBY)) ? "no " : ""); - if (stm32x_info->has_dual_banks) { - if (optionbyte >> OPT_BFB2 & 1) - command_print(CMD_CTX, "Boot: Bank 0"); - else - command_print(CMD_CTX, "Boot: Bank 1"); - } + if (stm32x_info->has_dual_banks) + command_print(CMD_CTX, "boot: bank %d", (optionbyte & (1 << OPT_BFB2)) ? 0 : 1); - command_print(CMD_CTX, "User Option0: 0x%02" PRIx8, - (uint8_t)((user_data >> stm32x_info->user_data_offset) & 0xff)); - command_print(CMD_CTX, "User Option1: 0x%02" PRIx8, - (uint8_t)((user_data >> (stm32x_info->user_data_offset + 8)) & 0xff)); + command_print(CMD_CTX, "user data = 0x%02" PRIx16 "", user_data); return ERROR_OK; } @@ -1434,7 +1341,7 @@ COMMAND_HANDLER(stm32x_handle_options_write_command) return retval; /* start with current options */ - optionbyte = stm32x_info->option_bytes.user_options; + optionbyte = stm32x_info->option_bytes.user; /* skip over flash bank */ CMD_ARGC--; @@ -1471,7 +1378,7 @@ COMMAND_HANDLER(stm32x_handle_options_write_command) return ERROR_OK; } - stm32x_info->option_bytes.user_options = optionbyte; + stm32x_info->option_bytes.user = optionbyte; if (stm32x_write_options(bank) != ERROR_OK) { command_print(CMD_CTX, "stm32x failed to write options"); @@ -1479,8 +1386,55 @@ COMMAND_HANDLER(stm32x_handle_options_write_command) } command_print(CMD_CTX, "stm32x write options complete.\n" - "INFO: a reset or power cycle is required " - "for the new settings to take effect."); + "INFO: %spower cycle is required " + "for the new settings to take effect.", + stm32x_info->can_load_options + ? "'stm32f1x options_load' command or " : ""); + + return ERROR_OK; +} + +COMMAND_HANDLER(stm32x_handle_options_load_command) +{ + if (CMD_ARGC < 1) + return ERROR_COMMAND_SYNTAX_ERROR; + + struct flash_bank *bank; + int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank); + if (ERROR_OK != retval) + return retval; + + struct stm32x_flash_bank *stm32x_info = bank->driver_priv; + + if (!stm32x_info->can_load_options) { + LOG_ERROR("Command not applicable to stm32f1x devices - power cycle is " + "required instead."); + return ERROR_FAIL; + } + + struct target *target = bank->target; + + if (target->state != TARGET_HALTED) { + LOG_ERROR("Target not halted"); + return ERROR_TARGET_NOT_HALTED; + } + + retval = stm32x_check_operation_supported(bank); + if (ERROR_OK != retval) + return retval; + + /* unlock option flash registers */ + retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY1); + if (retval != ERROR_OK) + return retval; + retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_KEYR), KEY2); + if (retval != ERROR_OK) + return retval; + + /* force re-load of option bytes - generates software reset */ + retval = target_write_u32(target, stm32x_get_flash_reg(bank, STM32_FLASH_CR), FLASH_OBL_LAUNCH); + if (retval != ERROR_OK) + return retval; return ERROR_OK; } @@ -1574,7 +1528,7 @@ static const struct command_registration stm32x_exec_command_handlers[] = { .handler = stm32x_handle_options_read_command, .mode = COMMAND_EXEC, .usage = "bank_id", - .help = "Read and display device option byte.", + .help = "Read and display device option bytes.", }, { .name = "options_write", @@ -1583,7 +1537,14 @@ static const struct command_registration stm32x_exec_command_handlers[] = { .usage = "bank_id ('SWWDG'|'HWWDG') " "('RSTSTNDBY'|'NORSTSTNDBY') " "('RSTSTOP'|'NORSTSTOP')", - .help = "Replace bits in device option byte.", + .help = "Replace bits in device option bytes.", + }, + { + .name = "options_load", + .handler = stm32x_handle_options_load_command, + .mode = COMMAND_EXEC, + .usage = "bank_id", + .help = "Force re-load of device option bytes.", }, COMMAND_REGISTRATION_DONE }; -- 2.39.5