1 files changed, 83 insertions, 0 deletions
diff --git a/shim/entry.c b/shim/entry.c
new file mode 100644
index 0000000..303f582
--- /dev/null
+++ b/shim/entry.c
@@ -0,0 +1,83 @@
+#include <loader/efi/shim.h>
+#include <kernel/memory/range.h>
+
+#include <stdbool.h>
+
+#include "../lib/elf.h"
+
+struct efi_memory_map
+{
+    struct memory_range buffer;
+    UINTN size;
+    UINTN key;
+    UINTN descsize;
+    UINT32 descver;
+};
+
+struct efi_video_data
+{
+    struct memory_range buffer;
+    UINT32 width;
+    UINT32 height;
+    UINT32 pitch;
+    EFI_GRAPHICS_PIXEL_FORMAT format;
+    EFI_PIXEL_BITMASK mask;
+};
+
+struct efi_boot_data
+{
+    struct efi_memory_map memory_map;
+    struct efi_video_data video_data;
+    void *acpi_rsdp;
+    unsigned long acpi_version;
+};
+
+struct efi_loader_image kernel_image =
+{
+    .path = L"\\adasoft\\sophia\\kernel.os"
+};
+
+static struct efi_loader_image *shim_image;
+static struct efi_boot_data boot_data;
+
+EFI_STATUS efi_shim_entry(struct efi_loader_image *image,
+        struct efi_loader_interface *interface)
+{
+    /* 1. load kernel and boot modules into memory
+     * 2. generate page tables for kernel and boot modules
+     * 2. gather boot data, store as type SystemMemoryType
+     * 3. exit boot services
+     * 5. ???????????
+     */
+    
+    EFI_STATUS status;
+
+    if (!image)
+    {
+        return EFI_INVALID_PARAMETER;
+    }
+    else if (!shim_image)
+    {
+        shim_image = image;
+        kernel_image.image_handle = shim_image->image_handle;
+    }
+    else
+    {
+        return EFI_ALREADY_STARTED;
+    }
+
+    if (!EFI_ERROR((status = interface->image_open(&kernel_image))) &&
+            !EFI_ERROR((status = interface->image_alloc(&kernel_image))) &&
+            !EFI_ERROR((status = interface->image_load(&kernel_image))))
+    {
+        (void)boot_data;
+    }
+
+    __asm__ volatile (
+            "cli\n\t"
+            "hlt\n\t"
+            );
+
+    return status;
+}
+