52 lines
2 KiB
Zig
52 lines
2 KiB
Zig
const std = @import("std");
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const builtin = @import("builtin");
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const build_options = @import("build_options");
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const arch = @import("arch.zig").internals;
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const multiboot = @import("multiboot.zig");
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const tty = @import("tty.zig");
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const vga = @import("vga.zig");
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const log = @import("log.zig");
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const serial = @import("serial.zig");
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const mem = if (builtin.is_test) @import(build_options.mock_path ++ "mem_mock.zig") else @import("mem.zig");
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comptime {
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switch (builtin.arch) {
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.i386 => _ = @import("arch/x86/boot.zig"),
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else => {},
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}
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}
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// This is for unit testing as we need to export KERNEL_ADDR_OFFSET as it is no longer available
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// from the linker script
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export var KERNEL_ADDR_OFFSET: u32 = if (builtin.is_test) 0xC0000000 else undefined;
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// Need to import this as we need the panic to be in the root source file, or zig will just use the
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// builtin panic and just loop, which is what we don't want
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const panic_root = @import("panic.zig").panic;
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// Just call the panic function, as this need to be in the root source file
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pub fn panic(msg: []const u8, error_return_trace: ?*builtin.StackTrace) noreturn {
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@setCold(true);
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arch.disableInterrupts();
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panic_root(error_return_trace, "{}", msg);
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}
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export fn kmain(mb_info: *multiboot.multiboot_info_t, mb_magic: u32) void {
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if (mb_magic == multiboot.MULTIBOOT_BOOTLOADER_MAGIC) {
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// Booted with compatible bootloader
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const mem_profile = mem.init(mb_info);
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var buffer = mem_profile.vaddr_end[0..mem_profile.fixed_alloc_size];
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var fixed_allocator = std.heap.FixedBufferAllocator.init(buffer);
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serial.init(serial.DEFAULT_BAUDRATE, serial.Port.COM1) catch unreachable;
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log.logInfo("Init arch " ++ @tagName(builtin.arch) ++ "\n");
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arch.init(&mem_profile, &fixed_allocator.allocator, build_options);
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log.logInfo("Arch init done\n");
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vga.init();
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tty.init();
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log.logInfo("Init done\n");
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tty.print("Hello Pluto from kernel :)\n");
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}
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}
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