#![no_std]
#![doc(html_logo_url = "https://avatars.githubusercontent.com/u/46717278")]
pub use esp_hal_common::*;
pub mod analog {
pub use esp_hal_common::analog::{AvailableAnalog, SarAdcExt};
}
extern "C" {
cfg_if::cfg_if! {
if #[cfg(feature = "mcu-boot")] {
fn _start();
fn cache_suspend_icache() -> u32;
fn cache_resume_icache(val: u32);
fn cache_invalidate_icache_all();
fn cache_dbus_mmu_set(
ext_ram: u32,
vaddr: u32,
paddr: u32,
psize: u32,
num: u32,
fixed: u32,
) -> i32;
fn cache_ibus_mmu_set(
ext_ram: u32,
vaddr: u32,
paddr: u32,
psize: u32,
num: u32,
fixed: u32,
) -> i32;
static mut _image_irom_vma: u32;
static mut _image_irom_lma: u32;
static mut _image_irom_size: u32;
static mut _image_drom_vma: u32;
static mut _image_drom_lma: u32;
static mut _image_drom_size: u32;
}
}
}
#[cfg(feature = "mcu-boot")]
#[link_section = ".entry_addr"]
#[no_mangle]
#[used]
static ENTRY_POINT: unsafe extern "C" fn() = _start;
#[cfg(feature = "mcu-boot")]
#[link_section = ".rwtext"]
unsafe fn configure_mmu() {
const PARTITION_OFFSET: u32 = 0x10000;
let app_irom_lma = PARTITION_OFFSET + ((&_image_irom_lma as *const u32) as u32);
let app_irom_size = (&_image_irom_size as *const u32) as u32;
let app_irom_vma = (&_image_irom_vma as *const u32) as u32;
let app_drom_lma = PARTITION_OFFSET + ((&_image_drom_lma as *const u32) as u32);
let app_drom_size = (&_image_drom_size as *const u32) as u32;
let app_drom_vma = (&_image_drom_vma as *const u32) as u32;
let autoload = cache_suspend_icache();
cache_invalidate_icache_all();
const FLASH_MMU_TABLE: *mut u32 = 0x600c_5000 as *mut u32;
const ICACHE_MMU_SIZE: usize = 0x200;
const FLASH_MMU_TABLE_SIZE: usize = ICACHE_MMU_SIZE / core::mem::size_of::<u32>();
const MMU_TABLE_INVALID_VAL: u32 = 0x100;
for i in 0..FLASH_MMU_TABLE_SIZE {
FLASH_MMU_TABLE.add(i).write_volatile(MMU_TABLE_INVALID_VAL);
}
const MMU_BLOCK_SIZE: u32 = 0x0001_0000;
const MMU_FLASH_MASK: u32 = !(MMU_BLOCK_SIZE - 1);
let calc_mmu_pages = |size, vaddr| {
(size + (vaddr - (vaddr & MMU_FLASH_MASK)) + MMU_BLOCK_SIZE - 1) / MMU_BLOCK_SIZE
};
let drom_lma_aligned = app_drom_lma & MMU_FLASH_MASK;
let drom_vma_aligned = app_drom_vma & MMU_FLASH_MASK;
let drom_page_count = calc_mmu_pages(app_drom_size, app_drom_vma);
cache_dbus_mmu_set(
0,
drom_vma_aligned,
drom_lma_aligned,
64,
drom_page_count,
0,
);
let irom_lma_aligned = app_irom_lma & MMU_FLASH_MASK;
let irom_vma_aligned = app_irom_vma & MMU_FLASH_MASK;
let irom_page_count = calc_mmu_pages(app_irom_size, app_irom_vma);
cache_ibus_mmu_set(
0,
irom_vma_aligned,
irom_lma_aligned,
64,
irom_page_count,
0,
);
let extmem = unsafe { &*peripherals::EXTMEM::ptr() };
extmem.icache_ctrl1.modify(|_, w| {
w.icache_shut_ibus()
.clear_bit()
.icache_shut_dbus()
.clear_bit()
});
cache_resume_icache(autoload);
}
#[allow(unreachable_code)]
#[export_name = "__post_init"]
#[doc(hidden)]
#[cfg_attr(feature = "mcu-boot", link_section = ".rwtext")]
pub fn post_init() {
#[cfg(feature = "mcu-boot")]
unsafe {
configure_mmu();
}
}