loader: initial loader code

src/loader/info.zig

@@ -0,0 +1,45 @@
+/// Represents the system memory map.
+pub const MemMap = struct {
+    /// A memory map entry.
+    pub const Entry = struct {
+        pub const Type = enum {
+            Free,
+            Reserved,
+            LoaderReclaimable,
+            AcpiNvs,
+            AcpiReclaimable,
+        };
+
+        type: Type,
+        base: usize,
+        size: usize,
+    };
+
+    entry_count: usize,
+    entries: [128]Entry,
+};
+
+pub const Framebuffer = struct {
+    address: usize,
+    width: u32,
+    height: u32,
+    pitch: u32,
+    bpp: u8,
+};
+
+pub const KernelAddress = struct { physical_base: usize, virtual_base: usize };
+
+/// RSDP on ACPI machines
+rsdp: ?usize,
+
+/// Kernel command-line arguments
+cmdline: ?[]const u8,
+
+/// Memory map
+memory_map: MemMap,
+
+/// Framebuffer info, if available
+framebuffer: ?Framebuffer,
+
+/// Kernel address
+kernel_address: KernelAddress,