Function esp_idf_sys::spi_flash_cache2phys

pub unsafe extern "C" fn spi_flash_cache2phys(
    cached: *const c_void,
) -> usize

@brief Given a memory address where flash is mapped, return the corresponding physical flash offset.

Cache address does not have have been assigned via spi_flash_mmap(), any address in memory mapped flash space can be looked up.

@param cached Pointer to flashed cached memory.

@return

• SPI_FLASH_CACHE2PHYS_FAIL If cache address is outside flash cache region, or the address is not mapped.
• Otherwise, returns physical offset in flash