feat(loader, kernel): impl part of loader and initialize kernel structure

arch/x86_64/boot/params.zig

@@ -0,0 +1,52 @@
+const std = @import("std");
+// // const e820 = @import("e820.zig");
+// const video = @import("video.zig");
+
+// pub const SetupHeader = extern struct {
+//     _pad1: [15]u8 align(1),
+//     jump: u16 align(1),
+//     header: u32 align(1),
+//     version: u16 align(1),
+//     _pad2: [8]u8 align(1),
+//     type_of_loader: u8 align(1),
+//     loadflags: u8 align(1),
+//     _pad3: [22]u8 align(1),
+//     cmd_line_ptr: u32 align(1),
+//     _pad4: [4]u8 align(1),
+//     kernel_alignment: u32 align(1),
+//     relocatable_kernel: u8 align(1),
+//     min_alignment: u8 align(1),
+//     xloadflags: u16 align(1),
+//     cmdline_size: u32 align(1),
+//     _pad5: [36]u8 align(1),
+//     init_size: u32 align(1),
+//     _pad6: [8]u8 align(1),
+// };
+
+// const E820_MAX_ENTRIES_BP = 128;
+
+// pub const BootParams = extern struct {
+//     screen_info: video.ScreenInfo align(1), // 0x000
+//     _pad1: [0x30]u8 align(1),         // 0x040
+//     acpi_rsdp_addr: u64 align(1),     // 0x070
+//     _pad2: [0x50]u8 align(1),         // 0x078
+//     ext_cmd_line_ptr: u32 align(1),   // 0x0c8
+//     _pad3: [0x74]u8 align(1),         // 0x0cc
+//     edid_info: [0x80]u8 align(1),     // 0x140 reserve for future use
+//     _pad4: [0x28]u8 align(1),         // 0x1c0
+//     e820_entries: u8 align(1),        // 0x1e8
+//     _pad5: [0x8]u8 align(1),          // 0x1e9
+//     hdr: SetupHeader align(1),        // 0x1f1
+//     _pad6: [0x2d0 - 0x1f1 - @sizeOf(SetupHeader)]u8 align(1),
+//     // e820_table: [E820_MAX_ENTRIES_BP]e820.E820Entry align(1),     // 0x2d0
+//     _pad7: [0x330]u8 align(1),                                    // 0xcd0
+// };
+
+// comptime {
+//     const assert = std.debug.assert;
+//     // assert(@sizeOf(BootParams) == 0x1000);
+//     assert(@sizeOf(SetupHeader) == 0x07b);
+// }
+pub const BootParams = struct {
+    cmdline: []u8
+};