cleanup: extract bootstrap and multiboot2 header from main.zig

1 files changed, 28 insertions, 0 deletions

diff --git a/src/bootstrap/boot.zig b/src/bootstrap/boot.zig
new file mode 100644
index 0000000..fcb60eb
--- /dev/null
+++ b/src/bootstrap/boot.zig
@@ -0,0 +1,28 @@
+comptime {
+    asm (@embedFile("boot64.s"));
+    asm (@embedFile("boot32.s"));
+}
+
+const MAGIC = 0xE85250D6;
+const ARCHITECTURE = 0;
+
+const MultibootHeader = extern struct {
+    magic: u32,
+    architecture: u32,
+    header_len: u32,
+    checksum: u32,
+
+    tag0: u16,
+    tag1: u16,
+    tag2: u32,
+};
+
+export const multiboot2 align(4) linksection(".multiboot") = MultibootHeader{
+    .magic = MAGIC,
+    .architecture = ARCHITECTURE,
+    .header_len = 24,
+    .checksum = 0x100000000 - (MAGIC + ARCHITECTURE + 24),
+    .tag0 = 0,
+    .tag1 = 0,
+    .tag2 = 8,
+};