Jeremy Soller
98 lines
3.4 KiB
Rust
98 lines
3.4 KiB
Rust
use spin::Mutex;
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use crate::memory::Frame;
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use crate::paging::{ActivePageTable, Page, PhysicalAddress, VirtualAddress};
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use crate::paging::entry::EntryFlags;
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use crate::paging::mapper::MapperFlushAll;
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pub use self::debug::DebugDisplay;
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use self::display::Display;
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use self::mode_info::VBEModeInfo;
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use self::primitive::fast_set64;
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pub mod debug;
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pub mod display;
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pub mod mode_info;
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pub mod primitive;
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pub static FONT: &'static [u8] = include_bytes!("../../../../res/unifont.font");
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pub static DEBUG_DISPLAY: Mutex<Option<DebugDisplay>> = Mutex::new(None);
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pub fn init(active_table: &mut ActivePageTable) {
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println!("Starting graphical debug");
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let width;
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let height;
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let physbaseptr;
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{
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let mode_info_addr = 0x5200;
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{
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let page = Page::containing_address(VirtualAddress::new(mode_info_addr));
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let frame = Frame::containing_address(PhysicalAddress::new(page.start_address().get()));
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let result = active_table.map_to(page, frame, EntryFlags::PRESENT | EntryFlags::NO_EXECUTE);
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result.flush(active_table);
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}
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{
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let mode_info = unsafe { &*(mode_info_addr as *const VBEModeInfo) };
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width = mode_info.xresolution as usize;
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height = mode_info.yresolution as usize;
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physbaseptr = mode_info.physbaseptr as usize;
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}
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{
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let page = Page::containing_address(VirtualAddress::new(mode_info_addr));
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let (result, _frame) = active_table.unmap_return(page, false);
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result.flush(active_table);
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}
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}
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{
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let size = width * height;
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let onscreen = physbaseptr + crate::KERNEL_OFFSET;
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{
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let mut flush_all = MapperFlushAll::new();
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let start_page = Page::containing_address(VirtualAddress::new(onscreen));
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let end_page = Page::containing_address(VirtualAddress::new(onscreen + size * 4));
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for page in Page::range_inclusive(start_page, end_page) {
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let frame = Frame::containing_address(PhysicalAddress::new(page.start_address().get() - crate::KERNEL_OFFSET));
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let flags = EntryFlags::PRESENT | EntryFlags::NO_EXECUTE | EntryFlags::WRITABLE | EntryFlags::HUGE_PAGE;
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let result = active_table.map_to(page, frame, flags);
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flush_all.consume(result);
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}
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flush_all.flush(active_table);
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}
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unsafe { fast_set64(onscreen as *mut u64, 0, size/2) };
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let display = Display::new(width, height, onscreen);
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let debug_display = DebugDisplay::new(display);
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*DEBUG_DISPLAY.lock() = Some(debug_display);
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}
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}
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pub fn fini(active_table: &mut ActivePageTable) {
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if let Some(debug_display) = DEBUG_DISPLAY.lock().take() {
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let display = debug_display.into_display();
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let onscreen = display.onscreen.as_mut_ptr() as usize;
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let size = display.width * display.height;
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{
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let mut flush_all = MapperFlushAll::new();
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let start_page = Page::containing_address(VirtualAddress::new(onscreen));
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let end_page = Page::containing_address(VirtualAddress::new(onscreen + size * 4));
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for page in Page::range_inclusive(start_page, end_page) {
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let (result, _frame) = active_table.unmap_return(page, false);
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flush_all.consume(result);
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}
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flush_all.flush(active_table);
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}
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}
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println!("Finished graphical debug");
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}
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