I already limited everything
```rs
const PICO_FLASH_SIZE_BYTES: u32 = 2097152;
const FLASH_SECTOR_SIZE: u32 = 4096;
const FLASH_PAGE_SIZE: u32 = 256;
const XIP_BASE: u32 = 0x10000000;
const SECTORS_TO_USE: u32 = 2;

const AVAILABLE_SIZE: u32 = SECTORS_TO_USE * FLASH_SECTOR_SIZE;
const START_ADDRESS: u32 = PICO_FLASH_SIZE_BYTES - AVAILABLE_SIZE;
const XIP_START_ADDRESS: u32 = XIP_BASE + START_ADDRESS;
```