Microkernel thing OS experiment (Zig ⚡)
pci.express
1const console = @import("console");
2const common = @import("root.zig");
3const mm = common.mm;
4const std = @import("std");
5const arch = @import("arch");
6const spinlock = @import("spinlock");
7
8// Types
9pub const HardwareDescription = union(enum) {
10 /// Physical address of ACPI RSDP
11 acpi_rsdp: usize,
12 /// Virtual pointer to DTB
13 dtb: *anyopaque,
14 none,
15};
16
17pub const InitState = struct {
18 bootmem: mm.bootmem.BootPmm = .{},
19 console: ?console.Console = null,
20 framebuffer: ?console.Framebuffer = null,
21 hardware_description: HardwareDescription = .none,
22 root_task: []align(4096) u8 = undefined,
23 hhdm_slide: usize = 0,
24};
25
26var stdout_lock: spinlock.Spinlock = .{};
27
28pub fn logFn(
29 comptime message_level: std.log.Level,
30 comptime scope: @TypeOf(.enum_literal),
31 comptime format: []const u8,
32 args: anytype,
33) void {
34 if (common.init_data.console == null) return;
35
36 // Use the same naming as the default logger
37 const level, const color = switch (message_level) {
38 .debug => .{ "D", 0x3bcf1d },
39 .err => .{ "E", 0xff0000 },
40 .info => .{ "I", 0x00bbbb },
41 .warn => .{ "W", 0xfee409 },
42 };
43 // Use same format as default once again
44 const scope_text = switch (scope) {
45 .default => "",
46 else => "<" ++ @tagName(scope) ++ ">",
47 };
48 const prefix = std.fmt.comptimePrint("{s}{s}: ", .{ level, scope_text });
49
50 {
51 stdout_lock.lock();
52 defer stdout_lock.unlock();
53
54 const cons = &common.init_data.console.?;
55
56 cons.setColor(color, 0);
57 cons.writer().print(prefix ++ format ++ "\n", args) catch return;
58 }
59}
60
61pub fn panic(msg: []const u8, first_trace_addr: ?usize) noreturn {
62 _ = first_trace_addr;
63 const log = std.log.scoped(.panic);
64 common.init_data.console.?.setColor(0xff0000, 0);
65 log.err("PANIC: {s}", .{msg});
66 var it = std.debug.StackIterator.init(@returnAddress(), @frameAddress());
67 defer it.deinit();
68 while (it.next()) |addr| {
69 if (addr == 0) break;
70 log.err("Addr: 0x{x:0>16}", .{addr});
71 }
72 arch.instructions.die();
73}