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#![no_std]
#![no_main]
#![allow(static_mut_refs, unsafe_code)]
use core::panic::PanicInfo;
use rsnix::uefi::*;
// ---------------------------------------------------------------------------
// Panic handler
// ---------------------------------------------------------------------------
#[panic_handler]
fn panic(info: &PanicInfo) -> ! {
use core::fmt::Write;
rsnix::serial::write_str("\r\n*** PANIC ***\r\n");
let _ = write!(&mut rsnix::serial::SerialWriter, "{}\r\n", info.message());
if let Some(loc) = info.location() {
let _ = write!(
&mut rsnix::serial::SerialWriter,
" at {}:{}\r\n",
loc.file(),
loc.line()
);
}
loop {
unsafe {
core::arch::asm!("cli; hlt");
}
}
}
// ---------------------------------------------------------------------------
// EFI entry point
// ---------------------------------------------------------------------------
#[no_mangle]
pub extern "efiapi" fn efi_main(image_handle: Handle, system_table: *mut SystemTable) -> ! {
let st = unsafe { &mut *system_table };
let bs = unsafe { &mut *st.boot_services };
let con_out = unsafe { &mut *st.con_out };
// ---- Phase 1: UEFI boot services alive ----
// Print banner via UEFI console
unsafe {
let s = concat!("rsnix v", env!("CARGO_PKG_VERSION"), " booting..\n");
let bytes = s.as_bytes();
let mut buf: [u16; 48] = [0; 48];
for (i, &b) in bytes.iter().enumerate().take(47) {
buf[i] = b as u16;
}
(con_out.output_string)(con_out, buf.as_ptr());
}
rsnix::serial::init();
rsnix::serial_println!("=== rsnix boot ===");
// Stash the memory map
let map_key = match rsnix::memory::capture_memory_map(bs) {
Ok(k) => k,
Err(e) => {
rsnix::serial_println!("mem: capture_memory_map failed 0x{:x}", e);
0
}
};
// Locate GOP (Graphics Output Protocol)
let mut gop_interface: *mut core::ffi::c_void = core::ptr::null_mut();
let gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
let gop_result = unsafe {
(bs.locate_protocol)(
&gop_guid as *const Guid,
core::ptr::null_mut(),
&mut gop_interface,
)
};
if gop_result == EFI_SUCCESS {
let gop = unsafe { &mut *(gop_interface as *mut GraphicsOutputProtocol) };
rsnix::serial_println!("gop: framebuffer found");
rsnix::gop::init(gop);
} else {
rsnix::serial_println!("gop: not found (0x{:x})", gop_result);
}
// ExitBootServices — we now own the machine
if unsafe { (bs.exit_boot_services)(image_handle, map_key) } != EFI_SUCCESS {
rsnix::serial_println!("WARN: ExitBootServices failed, retrying...");
match rsnix::memory::refresh_and_exit(bs, image_handle) {
Ok(_) => {}
Err(e) => {
rsnix::serial_println!("FATAL: cannot ExitBootServices (0x{:x})", e);
loop {
unsafe {
core::arch::asm!("cli; hlt");
}
}
}
}
}
// ---- Phase 2: Native mode ----
rsnix::serial::init();
rsnix::serial_println!("serial: COM1 115200 8N1");
rsnix::ps2::init();
rsnix::serial_println!("ps2: keyboard initialized");
rsnix::interrupts::init();
rsnix::serial_println!("intr: IDT loaded, PIC remapped, timer ~100 Hz");
dump_memory_summary();
rsnix::serial_println!("boot: entering shell");
shell::run();
}
// ---------------------------------------------------------------------------
// Print a memory summary from the stashed memory map
// ---------------------------------------------------------------------------
fn dump_memory_summary() {
let (map, key) = rsnix::memory::get_map();
let mut conventional_4k = 0u64;
let mut addr_space_4k = 0u64;
for desc in map.iter() {
let pages = desc.number_of_pages;
addr_space_4k += pages;
if desc.kind == 7 {
conventional_4k += pages;
}
}
rsnix::serial_println!(
"mem: {} entries, key=0x{:x}, usable: {} KB ({} MB)",
map.len(),
key,
conventional_4k * 4,
(conventional_4k * 4) / 1024,
);
rsnix::serial_println!(
"mem: address space: {} MB (incl. PCIe MMIO)",
(addr_space_4k * 4) / 1024,
);
}
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