i think it works

code/kernel/boot_info.h

@@ -0,0 +1,45 @@
+#pragma once
+// boot_info.h  - shared between bootx64.efi and kernel.exe
+// The bootloader fills this structure and passes a pointer to KernelMain.
+#include <stdint.h>
+#include "memory_map.h"
+
+#define BOOT_INFO_MAGIC    0x424F4F54494E464FULL   /* 'BOOTINFO' */
+#define MAX_BOOT_MODULES   32
+
+typedef struct BOOT_MODULE {
+    char      Name[32];        /* e.g. "hal.dll", "ide.sys"   */
+    uintptr_t VirtBase;        /* where it was mapped          */
+    size_t    ImageSize;
+} BOOT_MODULE;
+
+typedef struct BOOT_INFO {
+    uint64_t      Magic;
+
+    /* Physical memory. */
+    MEMORY_MAP    MemoryMap;
+
+    /* GOP framebuffer. */
+    uintptr_t     FramebufferBase;
+    uint32_t      FramebufferWidth;
+    uint32_t      FramebufferHeight;
+    uint32_t      FramebufferStride;   /* pixels per row */
+    uint32_t      _pad0;
+
+    /* Loaded modules. */
+    BOOT_MODULE   Modules[MAX_BOOT_MODULES];
+    uint32_t      ModuleCount;
+    uint32_t      _pad1;
+
+    char          CommandLine[64];
+
+    /* ACPI RSDP physical address (for APIC, HPET). */
+    uintptr_t     RsdpPhysical;
+
+    /* Direct physical window base - always 0xFFFF880000000000. */
+    uintptr_t     PhysicalMapBase;
+
+    /* From boot.ini */
+    uint32_t      DebugEnabled;
+    uint32_t      _pad2;
+} BOOT_INFO;