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Switch supervisor/internal_flash to use new nrf_nvm_safe_flash_page_write

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adafruit/circuitpython#1610
This commit is contained in:
Nick Moore 2019-04-04 15:43:40 +11:00
parent bc92441803
commit bcb87ffd6c
2 changed files with 10 additions and 79 deletions
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88
ports/nrf/supervisor/internal_flash.c
View File

@ -35,7 +35,7 @@
#include "py/runtime.h"
#include "lib/oofatfs/ff.h"
#include "nrf_nvmc.h"
#include "peripherals/nrf/nvm.h"
#ifdef BLUETOOTH_SD
#include "ble_drv.h"
@ -47,9 +47,8 @@ extern uint32_t __fatfs_flash_start_addr[];
extern uint32_t __fatfs_flash_length[];
#define NO_CACHE 0xffffffff
#define FL_PAGE_SZ 4096
uint8_t _flash_cache[FL_PAGE_SZ] __attribute__((aligned(4)));
uint8_t _flash_cache[FLASH_PAGE_SIZE] __attribute__((aligned(4)));
uint32_t _flash_page_addr = NO_CACHE;
@ -71,78 +70,11 @@ uint32_t supervisor_flash_get_block_count(void) {
return ((uint32_t) __fatfs_flash_length) / FILESYSTEM_BLOCK_SIZE ;
}
#ifdef BLUETOOTH_SD
STATIC void sd_flash_operation_start(void) {
sd_flash_operation_status = SD_FLASH_OPERATION_IN_PROGRESS;
}
STATIC sd_flash_operation_status_t sd_flash_operation_wait_until_done(void) {
while (sd_flash_operation_status == SD_FLASH_OPERATION_IN_PROGRESS) {
sd_app_evt_wait();
}
return sd_flash_operation_status;
}
#endif
void supervisor_flash_flush(void) {
if (_flash_page_addr == NO_CACHE) return;
// Skip if data is the same
if (memcmp(_flash_cache, (void *)_flash_page_addr, FL_PAGE_SZ) != 0) {
#ifdef BLUETOOTH_SD
uint8_t sd_en = 0;
(void) sd_softdevice_is_enabled(&sd_en);
if (sd_en) {
uint32_t err_code;
sd_flash_operation_status_t status;
sd_flash_operation_start();
err_code = sd_flash_page_erase(_flash_page_addr / FL_PAGE_SZ);
if (err_code != NRF_SUCCESS) {
mp_raise_OSError_msg_varg(translate("Flash erase failed to start, err 0x%04x"), err_code);
}
status = sd_flash_operation_wait_until_done();
if (status == SD_FLASH_OPERATION_ERROR) {
mp_raise_OSError_msg(translate("Flash erase failed"));
}
// Divide a full page into parts, because writing a full page causes an assertion failure.
// See https://devzone.nordicsemi.com/f/nordic-q-a/40088/sd_flash_write-cause-nrf_fault_id_sd_assert/
const size_t BLOCK_PARTS = 2;
size_t words_to_write = FL_PAGE_SZ / sizeof(uint32_t) / BLOCK_PARTS;
for (size_t i = 0; i < BLOCK_PARTS; i++) {
sd_flash_operation_start();
err_code = sd_flash_write(((uint32_t *)_flash_page_addr) + i * words_to_write,
(uint32_t *)_flash_cache + i * words_to_write,
words_to_write);
if (err_code != NRF_SUCCESS) {
mp_raise_OSError_msg_varg(translate("Flash write failed to start, err 0x%04x"), err_code);
}
status = sd_flash_operation_wait_until_done();
if (status == SD_FLASH_OPERATION_ERROR) {
mp_raise_OSError_msg(translate("Flash write failed"));
}
}
} else {
#endif
nrf_nvmc_page_erase(_flash_page_addr);
nrf_nvmc_write_words(_flash_page_addr, (uint32_t *)_flash_cache, FL_PAGE_SZ / sizeof(uint32_t));
#ifdef BLUETOOTH_SD
}
#endif
}
_flash_page_addr = NO_CACHE;
}
void supervisor_flash_release_cache(void) {
}
mp_uint_t supervisor_flash_read_blocks(uint8_t *dest, uint32_t block, uint32_t num_blocks) {
// Must write out anything in cache before trying to read.
supervisor_flash_flush();
nrf_nvm_safe_flash_page_write(_flash_page_addr, _flash_cache);
_flash_page_addr = NO_CACHE;
uint32_t src = lba2addr(block);
memcpy(dest, (uint8_t*) src, FILESYSTEM_BLOCK_SIZE*num_blocks);
return 0; // success
@ -151,21 +83,21 @@ mp_uint_t supervisor_flash_read_blocks(uint8_t *dest, uint32_t block, uint32_t n
mp_uint_t supervisor_flash_write_blocks(const uint8_t *src, uint32_t lba, uint32_t num_blocks) {
while (num_blocks) {
uint32_t const addr = lba2addr(lba);
uint32_t const page_addr = addr & ~(FL_PAGE_SZ - 1);
uint32_t const page_addr = addr & ~(FLASH_PAGE_SIZE - 1);
uint32_t count = 8 - (lba % 8); // up to page boundary
count = MIN(num_blocks, count);
if (page_addr != _flash_page_addr) {
supervisor_flash_flush();
nrf_nvm_safe_flash_page_write(_flash_page_addr, _flash_cache);
_flash_page_addr = page_addr;
// Copy the current contents of the entire page into the cache.
memcpy(_flash_cache, (void *)page_addr, FL_PAGE_SZ);
memcpy(_flash_cache, (void *)page_addr, FLASH_PAGE_SIZE);
}
// Overwrite part or all of the page cache with the src data.
memcpy(_flash_cache + (addr & (FL_PAGE_SZ - 1)), src, count * FILESYSTEM_BLOCK_SIZE);
memcpy(_flash_cache + (addr & (FLASH_PAGE_SIZE - 1)), src, count * FILESYSTEM_BLOCK_SIZE);
// adjust for next run
lba += count;

1
ports/nrf/supervisor/internal_flash.h
View File

@ -32,7 +32,6 @@
#include "py/mpconfig.h"
#define FLASH_PAGE_SIZE 0x1000
#define CIRCUITPY_INTERNAL_NVM_SIZE 0
#define INTERNAL_FLASH_SYSTICK_MASK (0x1ff) // 512ms
#define INTERNAL_FLASH_IDLE_TICK(tick) (((tick) & INTERNAL_FLASH_SYSTICK_MASK) == 2)