54 lines
1.8 KiB
Rust
54 lines
1.8 KiB
Rust
pub const CLOCK_FREQ: usize = 12500000;
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pub const MMIO: &[(usize, usize)] = &[
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(0x0010_0000, 0x00_2000), // VIRT_TEST/RTC in virt machine
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(0x2000000, 0x10000), // core local interrupter (CLINT)
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(0xc000000, 0x210000), // VIRT_PLIC in virt machine
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(0x10000000, 0x9000), // VIRT_UART0 with GPU in virt machine
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];
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pub type BlockDeviceImpl = crate::drivers::block::VirtIOBlock;
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pub type CharDeviceImpl = crate::drivers::chardev::NS16550a<VIRT_UART>;
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pub const VIRT_PLIC: usize = 0xC00_0000;
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pub const VIRT_UART: usize = 0x1000_0000;
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#[allow(unused)]
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pub const VIRTGPU_XRES: u32 = 1280;
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#[allow(unused)]
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pub const VIRTGPU_YRES: u32 = 800;
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use crate::drivers::block::BLOCK_DEVICE;
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use crate::drivers::chardev::{CharDevice, UART};
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use crate::drivers::plic::{IntrTargetPriority, PLIC};
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use crate::drivers::{KEYBOARD_DEVICE, MOUSE_DEVICE};
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pub fn device_init() {
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use riscv::register::sie;
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let mut plic = unsafe { PLIC::new(VIRT_PLIC) };
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let hart_id: usize = 0;
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let supervisor = IntrTargetPriority::Supervisor;
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let machine = IntrTargetPriority::Machine;
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plic.set_threshold(hart_id, supervisor, 0);
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plic.set_threshold(hart_id, machine, 1);
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//irq nums: 5 keyboard, 6 mouse, 8 block, 10 uart
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for intr_src_id in [5usize, 6, 8, 10] {
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plic.enable(hart_id, supervisor, intr_src_id);
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plic.set_priority(intr_src_id, 1);
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}
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unsafe {
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sie::set_sext();
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}
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}
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pub fn irq_handler() {
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let mut plic = unsafe { PLIC::new(VIRT_PLIC) };
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let intr_src_id = plic.claim(0, IntrTargetPriority::Supervisor);
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match intr_src_id {
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5 => KEYBOARD_DEVICE.handle_irq(),
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6 => MOUSE_DEVICE.handle_irq(),
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8 => BLOCK_DEVICE.handle_irq(),
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10 => UART.handle_irq(),
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_ => panic!("unsupported IRQ {}", intr_src_id),
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}
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plic.complete(0, IntrTargetPriority::Supervisor, intr_src_id);
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}
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