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progress on porting to limine

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This commit is contained in:
TheOddGarlic 2022-08-20 09:27:37 +03:00
parent fe69e31b91
commit 23c355762c
9 changed files with 111 additions and 96 deletions
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14
Cargo.lock generated
View file

@ -30,7 +30,6 @@ dependencies = [
"acpi",
"axel",
"bitflags",
"bootloader",
"clparse",
"cpuio",
"ext2",
@ -41,6 +40,7 @@ dependencies = [
"kernel",
"lazy_static",
"libwasm",
"limine",
"linked_list_allocator",
"lliw",
"log",
@ -150,12 +150,6 @@ version = "1.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
[[package]]
name = "bootloader"
version = "0.9.22"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "de78decc37247c7cfac5dbf3495c7298c6ac97cb355161caa7e15969c6648e6c"
[[package]]
name = "cfg-if"
version = "1.0.0"
@ -348,6 +342,12 @@ name = "libwasm"
version = "0.1.0"
source = "git+https://git.ablecorp.us/able/libwasm.git#4ffcd290f8bc918ca4adf5e23ce2097968e4a8b2"
[[package]]
name = "limine"
version = "0.1.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "eac64618e505bab2387986e5b1014f5d344130d609685bbd8b71a10af3ee599d"
[[package]]
name = "linked_list_allocator"
version = "0.9.1"

2
ableos/Cargo.toml
View file

@ -108,7 +108,7 @@ git = "https://git.ablecorp.us:443/able/externc-libm.git"
riscv = "*"
[target.'cfg(target_arch = "x86_64")'.dependencies]
bootloader = { version = "0.9.8", features = ["map_physical_memory"] }
limine = "0.1"
cpuio = { git = "https://git.ablecorp.us/ondra05/cpuio.git" }
pic8259 = "0.10.1"
uart_16550 = "0.2.0"

9
ableos/json_targets/x86_64-ableos.json
View file

@ -11,5 +11,12 @@
"linker": "rust-lld",
"panic-strategy": "abort",
"disable-redzone": true,
"features": "-mmx,-sse,+soft-float"
"features": "-mmx,-sse,+soft-float",
"code-model": "kernel",
"pre-link-args": {
"ld.lld": [
"--gc-sections",
"--script=ableos/src/arch/x86_64/kernel.ld"
]
}
}

16
ableos/src/arch/x86_64/init.rs
View file

@ -17,15 +17,21 @@ pub fn init() {
Err(err) => serial_println!("{}", err),
}
let mut term = TERM.lock();
trace!("gdt");
gdt::init();
trace!("idt");
interrupts::init_idt();
unsafe { interrupts::PICS.lock().initialize() };
trace!("term");
let term = &*TERM;
trace!("term.lock()");
let mut term = term.lock();
// term.initialize();
term.set_dirty(true);
term.draw_term();
drop(term);
gdt::init();
interrupts::init_idt();
unsafe { interrupts::PICS.lock().initialize() };
x86_64::instructions::interrupts::enable();
}

48
ableos/src/arch/x86_64/kernel.ld Normal file
View file

@ -0,0 +1,48 @@
/* Tell the linker that we want an x86_64 ELF64 output file */
OUTPUT_FORMAT(elf64-x86-64)
OUTPUT_ARCH(i386:x86-64)
/* We want the symbol `x86_64_start` to be our entry point */
ENTRY(x86_64_start)
/* Define the program headers we want so the bootloader gives us the right */
/* MMU permissions */
PHDRS
{
null PT_NULL FLAGS(0) ; /* Null segment */
text PT_LOAD FLAGS((1 << 0) | (1 << 2)) ; /* Execute + Read */
rodata PT_LOAD FLAGS((1 << 2)) ; /* Read only */
data PT_LOAD FLAGS((1 << 1) | (1 << 2)) ; /* Write + Read */
}
SECTIONS
{
/* We wanna be placed in the topmost 2GiB of the address space, for optimisations */
/* and because that is what the Limine spec mandates. */
/* Any address in this region will do, but often 0xffffffff80000000 is chosen as */
/* that is the beginning of the region. */
. = 0xffffffff80000000;
.text : {
*(.text .text.*)
} :text
/* Move to the next memory page for .rodata */
. += CONSTANT(MAXPAGESIZE);
.rodata : {
*(.rodata .rodata.*)
} :rodata
/* Move to the next memory page for .data */
. += CONSTANT(MAXPAGESIZE);
.data : {
*(.data .data.*)
} :data
.bss : {
*(COMMON)
*(.bss .bss.*)
} :data
}

74
ableos/src/arch/x86_64/memory.rs
View file

@ -1,7 +1,7 @@
use bootloader::bootinfo::{MemoryMap, MemoryRegionType};
use limine::{LimineMemmapResponse, LimineMemoryMapEntryType};
use x86_64::{
structures::paging::{
FrameAllocator, FrameDeallocator, Mapper, OffsetPageTable, Page, PageTable, PhysFrame,
FrameAllocator, FrameDeallocator, OffsetPageTable, PageTable, PhysFrame,
Size4KiB,
},
PhysAddr, VirtAddr,
@ -25,69 +25,13 @@ unsafe fn active_level_4_table(physical_memory_offset: VirtAddr) -> &'static mut
&mut *page_table_ptr
}
fn translate_addr_inner(addr: VirtAddr, physical_memory_offset: VirtAddr) -> Option<PhysAddr> {
use x86_64::registers::control::Cr3;
use x86_64::structures::paging::page_table::FrameError;
let (level_4_table_frame, _) = Cr3::read();
let table_indexes = [
addr.p4_index(),
addr.p3_index(),
addr.p2_index(),
addr.p1_index(),
];
let mut frame = level_4_table_frame;
for &index in &table_indexes {
// convert the frame into a page table reference
let virt = physical_memory_offset + frame.start_address().as_u64();
let table_ptr: *const PageTable = virt.as_ptr();
let table = unsafe { &*table_ptr };
let entry = &table[index];
frame = match entry.frame() {
Ok(frame) => frame,
Err(FrameError::FrameNotPresent) => return None,
Err(FrameError::HugeFrame) => panic!["huge pages not supported"],
};
}
Some(frame.start_address() + u64::from(addr.page_offset()))
}
pub unsafe fn translate_addr(addr: VirtAddr, physical_memory_offset: VirtAddr) -> Option<PhysAddr> {
translate_addr_inner(addr, physical_memory_offset)
}
pub fn create_example_mapping(
page: Page,
mapper: &mut OffsetPageTable,
frame_allocator: &mut impl FrameAllocator<Size4KiB>,
) {
use x86_64::structures::paging::PageTableFlags as Flags;
let frame = PhysFrame::containing_address(PhysAddr::new(0xb8000));
let flags = Flags::PRESENT | Flags::WRITABLE;
let map_to_result = unsafe { mapper.map_to(page, frame, flags, frame_allocator) };
map_to_result.expect("map_to failed").flush();
}
pub struct EmptyFrameAllocator;
unsafe impl FrameAllocator<Size4KiB> for EmptyFrameAllocator {
fn allocate_frame(&mut self) -> Option<PhysFrame<Size4KiB>> {
None
}
}
pub struct BootInfoFrameAllocator {
memory_map: &'static MemoryMap,
memory_map: &'static LimineMemmapResponse,
next: usize,
}
impl BootInfoFrameAllocator {
pub unsafe fn init(memory_map: &'static MemoryMap) -> Self {
pub unsafe fn init(memory_map: &'static LimineMemmapResponse) -> Self {
Self {
memory_map,
next: 0,
@ -95,11 +39,11 @@ impl BootInfoFrameAllocator {
}
fn usable_frames(&self) -> impl Iterator<Item = PhysFrame> {
let regions = self.memory_map.iter();
let usable_regions = regions.filter(|r| r.region_type == MemoryRegionType::Usable);
let addr_range = usable_regions.map(|r| r.range.start_addr()..r.range.end_addr());
let frame_address = addr_range.flat_map(|r| r.step_by(4096));
frame_address.map(|addr| PhysFrame::containing_address(PhysAddr::new(addr)))
self.memory_map.mmap().unwrap().iter()
.filter(|r| r.typ == LimineMemoryMapEntryType::Usable)
.map(|r| r.base..r.base + r.len)
.flat_map(|r| r.step_by(4096))
.map(|addr| PhysFrame::containing_address(PhysAddr::new(addr)))
}
}

27
ableos/src/arch/x86_64/mod.rs
View file

@ -10,27 +10,24 @@ pub mod init;
pub mod interrupts;
pub mod memory;
use crate::arch::drivers::allocator;
use bootloader::{entry_point, BootInfo};
use limine::*;
use x86_64::{instructions::hlt, VirtAddr};
#[cfg(not(test))]
entry_point![start];
use crate::serial_println;
use self::drivers::allocator;
static HHDM: LimineHhdmRequest = LimineHhdmRequest::new(0);
static MMAP: LimineMmapRequest = LimineMmapRequest::new(0);
#[cfg(not(test))]
#[no_mangle]
pub fn start(boot_info: &'static BootInfo) -> ! {
let phys_mem_offset = VirtAddr::new(boot_info.physical_memory_offset);
pub fn x86_64_start() -> ! {
let hhdm = HHDM.get_response().get().unwrap();
let mmap = MMAP.get_response().get().unwrap();
let phys_mem_offset = VirtAddr::new(hhdm.offset);
let mut mapper = unsafe { memory::init(phys_mem_offset) };
let mut frame_allocator =
unsafe { memory::BootInfoFrameAllocator::init(&boot_info.memory_map) };
// let page = Page::containing_address(VirtAddr::new(0xdeadbeaf000));
// memory::create_example_mapping(page, &mut mapper, &mut frame_allocator);
//
// let page_ptr: *mut u64 = page.start_address().as_mut_ptr();
// unsafe { page_ptr.offset(400).write_volatile(0xf021_f077_f065_804e) };
let mut frame_allocator = unsafe { memory::BootInfoFrameAllocator::init(mmap) };
allocator::init_heap(&mut mapper, &mut frame_allocator).expect("heap initialization failed");

12
ableos/src/scratchpad.rs
View file

@ -43,7 +43,17 @@ impl acpi::AcpiHandler for AcpiStruct {
}
}
pub static TERM: Lazy<spin::Mutex<VTerm>> = Lazy::new(|| spin::Mutex::new(VTerm::new()));
pub static TERM: Lazy<spin::Mutex<VTerm>> = Lazy::new(|| {
trace!("mutex");
let mutex = spin::Mutex::new({
trace!("vterm");
let vterm = VTerm::new();
trace!("vterm-done");
vterm
});
trace!("mutex-done");
mutex
});
#[derive(Debug)]
pub struct Path {

5
kernel/src/allocator.rs
View file

@ -1,6 +1,7 @@
//! Memory allocator
use linked_list_allocator::LockedHeap;
use log::trace;
///
pub const HEAP_START: usize = 0x_4444_4444_0000;
@ -20,5 +21,7 @@ pub static ALLOCATOR: LockedHeap = LockedHeap::empty();
#[alloc_error_handler]
fn alloc_error_handler(layout: alloc::alloc::Layout) -> ! {
panic!("allocation error: {:?}", layout)
trace!("allocation error: {:?}", layout);
loop {}
// panic!("allocation error: {:?}", layout)
}