Function esp_idf_sys::spi_flash_mmap_get_free_pages

pub unsafe extern "C" fn spi_flash_mmap_get_free_pages(
    memory: spi_flash_mmap_memory_t
) -> u32

@brief get free pages number which can be mmap

This function will return number of free pages available in mmu table. This could be useful before calling actual spi_flash_mmap (maps flash range to DCache or ICache memory) to check if there is sufficient space available for mapping.

@param memory memory type of MMU table free page

@return number of free pages which can be mmaped