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添加帧缓冲区抽象并实现vesafb的驱动 (#483)
- 添加bootparams对象 - 修正由于bus的driver、device强弱引用关系 不正确从而导致对象被释放的bug - 添加vesafb的驱动 - 实现framebuffer抽象层 - 为通用帧缓冲区抽象实现sysfs的属性 - 修改设备号DeviceNumber的定义 - 仿照linux，添加initcall，并在第一个内核线程中，调用他们。
This commit is contained in:
LoGin
GitHub
@ -1,16 +1,12 @@
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use core::{
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ffi::{c_uint, c_void},
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mem::MaybeUninit,
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sync::atomic::{AtomicBool, Ordering},
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};
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use core::sync::atomic::{AtomicBool, Ordering};
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use crate::{
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arch::MMArch,
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driver::tty::serial::serial8250::send_to_default_serial8250_port,
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include::bindings::bindings::{
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multiboot2_get_Framebuffer_info, multiboot2_iter, multiboot_tag_framebuffer_info_t,
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FRAME_BUFFER_MAPPING_OFFSET, SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE,
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},
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init::boot_params,
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kinfo,
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libs::{
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align::page_align_up,
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@ -19,8 +15,8 @@ use crate::{
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spinlock::SpinLock,
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},
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mm::{
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allocator::page_frame::PageFrameCount, kernel_mapper::KernelMapper,
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no_init::pseudo_map_phys, page::PageFlags, MemoryManagementArch, PhysAddr, VirtAddr,
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allocator::page_frame::PageFrameCount, kernel_mapper::KernelMapper, page::PageFlags,
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MemoryManagementArch, VirtAddr,
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},
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time::timer::{Timer, TimerFunction},
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};
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@ -42,7 +38,6 @@ pub fn video_refresh_manager() -> &'static VideoRefreshManager {
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///管理显示刷新变量的结构体
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pub struct VideoRefreshManager {
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device_buffer: RwLock<ScmBufferInfo>,
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fb_info: multiboot_tag_framebuffer_info_t,
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refresh_target: RwLock<Option<Arc<SpinLock<Box<[u32]>>>>>,
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running: AtomicBool,
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}
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@ -94,6 +89,7 @@ impl VideoRefreshManager {
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let buf_vaddr = VirtAddr::new(
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SPECIAL_MEMOEY_MAPPING_VIRT_ADDR_BASE as usize + FRAME_BUFFER_MAPPING_OFFSET as usize,
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);
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boot_params().write_irqsave().screen_info.lfb_virt_base = Some(buf_vaddr);
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let mut frame_buffer_info_graud = self.device_buffer.write();
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if let ScmBuffer::DeviceBuffer(vaddr) = &mut (frame_buffer_info_graud).buf {
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@ -101,7 +97,7 @@ impl VideoRefreshManager {
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}
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// 地址映射
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let mut paddr = PhysAddr::new(self.fb_info.framebuffer_addr as usize);
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let mut paddr = boot_params().read().screen_info.lfb_base;
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let count = PageFrameCount::new(
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page_align_up(frame_buffer_info_graud.buf_size()) / MMArch::PAGE_SIZE,
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);
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@ -178,68 +174,48 @@ impl VideoRefreshManager {
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}
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/// 此函数用于初始化显示驱动，为后续的图形输出做好准备。
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#[cfg(not(target_arch = "riscv64"))]
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#[cfg(target_arch = "x86_64")]
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pub unsafe fn video_init() -> Result<(), SystemError> {
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static INIT: AtomicBool = AtomicBool::new(false);
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if INIT
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.compare_exchange(false, true, Ordering::SeqCst, Ordering::SeqCst)
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.is_err()
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{
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panic!("Try to init video twice!");
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}
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let mut _reserved: u32 = 0;
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let mut fb_info: MaybeUninit<multiboot_tag_framebuffer_info_t> = MaybeUninit::uninit();
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//从multiboot2中读取帧缓冲区信息至fb_info
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multiboot2_iter(
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Some(multiboot2_get_Framebuffer_info),
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fb_info.as_mut_ptr() as usize as *mut c_void,
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&mut _reserved as *mut c_uint,
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);
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fb_info.assume_init();
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let fb_info: multiboot_tag_framebuffer_info_t = core::mem::transmute(fb_info);
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let width = fb_info.framebuffer_width;
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let height = fb_info.framebuffer_height;
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//初始化帧缓冲区信息结构体
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let (bit_depth, flags) = if fb_info.framebuffer_type == 2 {
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//当type=2时,width与height用字符数表示,故depth=8
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(8u32, ScmBufferFlag::SCM_BF_TEXT | ScmBufferFlag::SCM_BF_FB)
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} else {
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//否则为图像模式,depth应参照帧缓冲区信息里面的每个像素的位数
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(
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fb_info.framebuffer_bpp as u32,
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ScmBufferFlag::SCM_BF_PIXEL | ScmBufferFlag::SCM_BF_FB,
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)
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use crate::{
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arch::driver::video::arch_video_early_init,
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driver::video::fbdev::base::BootTimeVideoType,
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};
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let buf_vaddr = VirtAddr::new(0xffff800003200000);
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let device_buffer = ScmBufferInfo::new_device_buffer(
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width,
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height,
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width * height * ((bit_depth + 7) / 8),
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bit_depth,
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flags,
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buf_vaddr,
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)
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.unwrap();
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arch_video_early_init()?;
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let init_text = "Video driver to map.\n\0";
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send_to_default_serial8250_port(init_text.as_bytes());
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let boot_params_guard = boot_params().read();
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let screen_info = &boot_params_guard.screen_info;
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let buf_vaddr = screen_info.lfb_virt_base.unwrap();
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//地址映射
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let paddr = PhysAddr::new(fb_info.framebuffer_addr as usize);
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let count = PageFrameCount::new(
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page_align_up(device_buffer.buf_size() as usize) / MMArch::PAGE_SIZE,
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);
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pseudo_map_phys(buf_vaddr, paddr, count);
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let buf_flag: ScmBufferFlag;
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let device_buffer: ScmBufferInfo;
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if screen_info.video_type == BootTimeVideoType::Mda {
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buf_flag = ScmBufferFlag::SCM_BF_TEXT | ScmBufferFlag::SCM_BF_FB;
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device_buffer = ScmBufferInfo::new_device_buffer(
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screen_info.origin_video_cols.into(),
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screen_info.origin_video_lines.into(),
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screen_info.lfb_size as u32,
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screen_info.lfb_depth.into(),
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buf_flag,
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buf_vaddr,
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)
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.unwrap();
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} else {
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// 图形模式
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buf_flag = ScmBufferFlag::SCM_BF_PIXEL | ScmBufferFlag::SCM_BF_FB;
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device_buffer = ScmBufferInfo::new_device_buffer(
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screen_info.lfb_width,
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screen_info.lfb_height,
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screen_info.lfb_size as u32,
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screen_info.lfb_depth.into(),
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buf_flag,
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buf_vaddr,
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)
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.unwrap();
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}
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let result = Self {
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fb_info,
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device_buffer: RwLock::new(device_buffer),
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refresh_target: RwLock::new(None),
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running: AtomicBool::new(false),
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