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cpu/esp32: erase improvement for periph_flash

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Performance of erasing the whole flash is drastically improved by erasing blocks of 64 kbyte, if possible, instead of erasing sectors of 4 kByte.
This commit is contained in:
Gunar Schorcht 2019-08-20 01:56:38 +02:00
parent 1c60e175ca
commit c6d33cf5de
1 changed files with 12 additions and 2 deletions
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14
cpu/esp32/periph/flash.c
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@ -339,13 +339,23 @@ esp_err_t IRAM_ATTR spi_flash_erase_range(size_t addr, size_t size)
/* erase as many sectors as necessary */
uint32_t sec = addr / _flashchip->sector_size;
uint32_t cnt = size / _flashchip->sector_size;
uint32_t sec_per_block = _flashchip->block_size / _flashchip->sector_size;
while (cnt-- && result == ESP_ROM_SPIFLASH_RESULT_OK) {
while (cnt && result == ESP_ROM_SPIFLASH_RESULT_OK) {
/* disable interrupts and the cache */
critical_enter();
Cache_Read_Disable(PRO_CPU_NUM);
result = esp_rom_spiflash_erase_sector (sec++);
/* erase block-wise (64 kByte) if cnt is at least sec_per_block */
if (cnt >= sec_per_block) {
result = esp_rom_spiflash_erase_block (sec / sec_per_block);
sec += sec_per_block;
cnt -= sec_per_block;
}
else {
result = esp_rom_spiflash_erase_sector (sec++);
cnt--;
}
/* enable interrupts and the cache */
Cache_Read_Enable(PRO_CPU_NUM);