1 files changed, 76 insertions, 0 deletions
diff --git a/include/boot/boot_info.h b/include/boot/boot_info.h
new file mode 100644
index 0000000..cc02ae8
--- /dev/null
+++ b/include/boot/boot_info.h
@@ -0,0 +1,76 @@
+#pragma once
+// ============================================================================
+// boot_info.h - Boot handoff struct
+// Shared between the UEFI loader and the kernel.
+// The loader fills it, the kernel consumes it. Simple.
+// In future i will expand this struct
+// ============================================================================
+
+#include <stdint.h>
+
+// ── Boot Magic Number───────────────────────────────────────────────────────
+inline constexpr uint64_t BOOT_INFO_MAGIC = 0xDEADDEADDEADDEADULL;
+
+// ── Framebuffer (GOP) ───────────────────────────────────────────────────────
+// TODO: remove Framebuffer to driver
+enum class PixelFormat : uint32_t {
+    RGB  = 0,  // PixelRedGreenBlueReserved8BitPerColor
+    BGR  = 1,  // PixelBlueGreenRedReserved8BitPerColor
+    Mask = 2,  // PixelBitMask — need to check masks
+};
+
+struct FramebufferInfo {
+    uint64_t    base;          // Physical address of framebuffer
+    uint32_t    width;         // Horizontal resolution in pixels
+    uint32_t    height;        // Vertical resolution in pixels
+    uint32_t    pitch;         // Bytes per scanline (>= width * 4)
+    PixelFormat format;
+};
+
+// ── Memory map ─────────────────────────────────────────────────────────────
+//TODO: remove FrameBuffer
+enum class MemoryRegionType : uint32_t {
+    Usable                = 0,  // Free RAM - kernel can use
+    Reserved              = 1,  // Firmware/hardware reserved
+    AcpiReclaimable       = 2,  // ACPI tables - free after parsing
+    AcpiNvs               = 3,  // ACPI non-volatile storage
+    BootloaderReclaimable = 4,  // Loader code/data - free after kernel init
+    KernelAndModules      = 5,  // Kernel image + any loaded modules
+    Framebuffer           = 6,  // Framebuffer memory - do not use as RAM
+};
+
+struct MemoryRegion {
+    uint64_t         base;
+    uint64_t         length;
+    MemoryRegionType type;
+    uint32_t         _reserved;  // Padding to 24 bytes
+};
+
+// ── Boot info structure ────────────────────────────────────────────────────
+
+struct BootInfo {
+    uint64_t        magic;               // Must be BOOT_INFO_MAGIC
+
+    // Framebuffer
+    // Todo: remove
+    FramebufferInfo framebuffer;
+
+    // Memory map (array of MemoryRegion)
+    MemoryRegion*   memory_map;
+    uint64_t        memory_map_count;
+
+    // Platform-specific firmware tables (both always present to keep layout uniform)
+    uint64_t        rsdp_address;        // ACPI RSDP (x86_64), 0 if absent
+    uint64_t        fdt_address;         // Flattened Device Tree (aarch64), 0 if absent
+
+    // Kernel load info
+    uint64_t        kernel_phys_base;    // Where the kernel was loaded physically
+    uint64_t        kernel_virt_base;    // Kernel's virtual base (from ELF)
+    uint64_t        kernel_size;         // Total size of kernel in memory
+
+    // Kernel entry point (virtual address from ELF e_entry)
+    uint64_t        kernel_entry_point;
+
+    // Higher-half direct map base (if set up by loader)
+    uint64_t        hhdm_base;           // e.g., 0xFFFF800000000000
+};