Function esp_idf_sys::esp_himem_reserved_area_size

pub unsafe extern "C" fn esp_himem_reserved_area_size() -> usize

@brief Get amount of SPI memory address space needed for bankswitching

@note This is also weakly defined in esp32/spiram.c and returns 0 there, so if no other function in this file is used, no memory is reserved.

@returns Amount of reserved area, in bytes