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stm32/flash: Simplify sector calculation for homogeneous flash layout. 

Newer STM32 parts have homogeneous flash layout, and in this case the MCU
configuration and page/sector calculation can be simplified.  The affected
functions are `flash_is_valid_addr()` and `flash_get_sector_info()`, which
are now simpler for homogeneous flash.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George 2023-11-01 17:06:41 +11:00
parent cd0f75069c
commit cf115918e6
1 changed files with 54 additions and 24 deletions
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78
ports/stm32/flash.c
View File

@ -66,12 +66,15 @@ typedef struct {
#if defined(STM32F0)
static const flash_layout_t flash_layout[] = {
{ FLASH_BASE, FLASH_PAGE_SIZE, (FLASH_BANK1_END + 1 - FLASH_BASE) / FLASH_PAGE_SIZE },
};
#define FLASH_LAYOUT_IS_HOMOGENEOUS (1)
#define FLASH_LAYOUT_START_ADDR (FLASH_BASE)
#define FLASH_LAYOUT_SECTOR_SIZE (FLASH_PAGE_SIZE)
#define FLASH_LAYOUT_NUM_SECTORS ((FLASH_BANK1_END + 1 - FLASH_BASE) / FLASH_PAGE_SIZE)
#elif defined(STM32F4)
#define FLASH_LAYOUT_IS_HOMOGENEOUS (0)
static const flash_layout_t flash_layout[] = {
{ 0x08000000, 0x04000, 4 },
{ 0x08010000, 0x10000, 1 },
@ -88,6 +91,8 @@ static const flash_layout_t flash_layout[] = {
#elif defined(STM32F7)
#define FLASH_LAYOUT_IS_HOMOGENEOUS (0)
// FLASH_FLAG_PGSERR (Programming Sequence Error) was renamed to
// FLASH_FLAG_ERSERR (Erasing Sequence Error) in STM32F7
#define FLASH_FLAG_PGSERR FLASH_FLAG_ERSERR
@ -113,27 +118,31 @@ static const flash_layout_t flash_layout[] = {
#elif defined(STM32G0) || defined(STM32G4) || defined(STM32L0) || defined(STM32L4) || defined(STM32WB) || defined(STM32WL)
static const flash_layout_t flash_layout[] = {
{ (uint32_t)FLASH_BASE, (uint32_t)FLASH_PAGE_SIZE, 512 },
};
#define FLASH_LAYOUT_IS_HOMOGENEOUS (1)
#define FLASH_LAYOUT_START_ADDR (FLASH_BASE)
#define FLASH_LAYOUT_SECTOR_SIZE (FLASH_PAGE_SIZE)
#define FLASH_LAYOUT_NUM_SECTORS (512)
#elif defined(STM32L1)
static const flash_layout_t flash_layout[] = {
{ (uint32_t)FLASH_BASE, 0x200, 1024 },
};
#define FLASH_LAYOUT_IS_HOMOGENEOUS (1)
#define FLASH_LAYOUT_START_ADDR (FLASH_BASE)
#define FLASH_LAYOUT_SECTOR_SIZE (0x200)
#define FLASH_LAYOUT_NUM_SECTORS (1024)
#elif defined(STM32H5)
static const flash_layout_t flash_layout[] = {
{ 0x08000000, 8192, 256 },
};
#define FLASH_LAYOUT_IS_HOMOGENEOUS (1)
#define FLASH_LAYOUT_START_ADDR (FLASH_BASE_NS)
#define FLASH_LAYOUT_SECTOR_SIZE (0x2000)
#define FLASH_LAYOUT_NUM_SECTORS (256)
#elif defined(STM32H7)
static const flash_layout_t flash_layout[] = {
{ 0x08000000, 0x20000, 16 },
};
#define FLASH_LAYOUT_IS_HOMOGENEOUS (1)
#define FLASH_LAYOUT_START_ADDR (FLASH_BASE)
#define FLASH_LAYOUT_SECTOR_SIZE (0x20000)
#define FLASH_LAYOUT_NUM_SECTORS (16)
#else
#error Unsupported processor
@ -156,14 +165,14 @@ static uint32_t get_bank(uint32_t addr) {
if (READ_BIT(SYSCFG->MEMRMP, SYSCFG_MEMRMP_FB_MODE) == 0) {
#endif
// no bank swap
if (addr < (FLASH_BASE + FLASH_BANK_SIZE)) {
if (addr < (FLASH_LAYOUT_START_ADDR + FLASH_BANK_SIZE)) {
return FLASH_BANK_1;
} else {
return FLASH_BANK_2;
}
} else {
// bank swap
if (addr < (FLASH_BASE + FLASH_BANK_SIZE)) {
if (addr < (FLASH_LAYOUT_START_ADDR + FLASH_BANK_SIZE)) {
return FLASH_BANK_2;
} else {
return FLASH_BANK_1;
@ -174,12 +183,12 @@ static uint32_t get_bank(uint32_t addr) {
#if (defined(STM32L4) && defined(SYSCFG_MEMRMP_FB_MODE))
// get the page of a given flash address
static uint32_t get_page(uint32_t addr) {
if (addr < (FLASH_BASE + FLASH_BANK_SIZE)) {
if (addr < (FLASH_LAYOUT_START_ADDR + FLASH_BANK_SIZE)) {
// bank 1
return (addr - FLASH_BASE) / FLASH_PAGE_SIZE;
return (addr - FLASH_LAYOUT_START_ADDR) / FLASH_LAYOUT_SECTOR_SIZE;
} else {
// bank 2
return (addr - (FLASH_BASE + FLASH_BANK_SIZE)) / FLASH_PAGE_SIZE;
return (addr - (FLASH_LAYOUT_START_ADDR + FLASH_BANK_SIZE)) / FLASH_LAYOUT_SECTOR_SIZE;
}
}
#endif
@ -187,18 +196,18 @@ static uint32_t get_page(uint32_t addr) {
#elif (defined(STM32L4) && !defined(SYSCFG_MEMRMP_FB_MODE)) || defined(STM32WB) || defined(STM32WL)
static uint32_t get_page(uint32_t addr) {
return (addr - FLASH_BASE) / FLASH_PAGE_SIZE;
return (addr - FLASH_LAYOUT_START_ADDR) / FLASH_LAYOUT_SECTOR_SIZE;
}
#elif defined(STM32G0) || defined(STM32G4)
static uint32_t get_page(uint32_t addr) {
return (addr - FLASH_BASE) / FLASH_PAGE_SIZE;
return (addr - FLASH_LAYOUT_START_ADDR) / FLASH_LAYOUT_SECTOR_SIZE;
}
static uint32_t get_bank(uint32_t addr) {
// no bank swap
if (addr < (FLASH_BASE + FLASH_BANK_SIZE)) {
if (addr < (FLASH_LAYOUT_START_ADDR + FLASH_BANK_SIZE)) {
return FLASH_BANK_1;
} else {
#if defined(FLASH_OPTR_DBANK)
@ -212,13 +221,33 @@ static uint32_t get_bank(uint32_t addr) {
#endif
bool flash_is_valid_addr(uint32_t addr) {
#if FLASH_LAYOUT_IS_HOMOGENEOUS
uint32_t base = FLASH_LAYOUT_START_ADDR;
uint32_t end_of_flash = FLASH_LAYOUT_START_ADDR + FLASH_LAYOUT_NUM_SECTORS * FLASH_LAYOUT_SECTOR_SIZE;
#else
uint32_t base = flash_layout[0].base_address;
uint8_t last = MP_ARRAY_SIZE(flash_layout) - 1;
uint32_t end_of_flash = flash_layout[last].base_address +
flash_layout[last].sector_count * flash_layout[last].sector_size;
return flash_layout[0].base_address <= addr && addr < end_of_flash;
#endif
return base <= addr && addr < end_of_flash;
}
int32_t flash_get_sector_info(uint32_t addr, uint32_t *start_addr, uint32_t *size) {
#if FLASH_LAYOUT_IS_HOMOGENEOUS
if (addr >= FLASH_LAYOUT_START_ADDR) {
uint32_t sector_index = (addr - FLASH_LAYOUT_START_ADDR) / FLASH_LAYOUT_SECTOR_SIZE;
if (sector_index < FLASH_LAYOUT_NUM_SECTORS) {
if (start_addr != NULL) {
*start_addr = FLASH_LAYOUT_START_ADDR + sector_index * FLASH_LAYOUT_SECTOR_SIZE;
}
if (size != NULL) {
*size = FLASH_LAYOUT_SECTOR_SIZE;
}
return sector_index;
}
}
#else
if (addr >= flash_layout[0].base_address) {
uint32_t sector_index = 0;
for (int i = 0; i < MP_ARRAY_SIZE(flash_layout); ++i) {
@ -239,6 +268,7 @@ int32_t flash_get_sector_info(uint32_t addr, uint32_t *start_addr, uint32_t *siz
}
}
}
#endif
return -1;
}