wip

src/common/hos/page_table.d

@@ -0,0 +1,23 @@
+struct PageTableEntry
+{
+    ulong entry;
+
+    this(ulong address, ulong no_execute, ulong global,
+            ulong huge, ulong disable_cache, ulong write_through, ulong user,
+            ulong writable, ulong present)
+    {
+        entry = (present |
+                (writable << 1) |
+                (user << 2) |
+                (write_through << 3) |
+                (disable_cache << 4) |
+                (huge << 7) |
+                (global << 8) |
+                (no_execute << 63)) | address;
+    }
+
+    bool present()
+    {
+        return (entry & 0x1u) != 0u;
+    }
+}

src/hello/hello.d

@@ -2,6 +2,7 @@ import uefi;
 import output;
 import scratch;
 import hulk.bootinfo;
+import hos.page_table;
 
 __gshared EFI_SYSTEM_TABLE * st;
 __gshared BootInfo bootinfo;
@@ -129,6 +130,9 @@ extern (C) EFI_STATUS efi_main(EFI_HANDLE image_handle, EFI_SYSTEM_TABLE * st)
     writeln("HELLO, HOS EFI Lightweight LOader, v0.1.0");
     writeln("Firmware vendor: '%S', version: 0x%x", st.FirmwareVendor, st.FirmwareVendor);
 
+    PageTableEntry * pte = cast(PageTableEntry *)scratch_alloc(1u);
+    wait_key();
+
     if (!set_graphics_mode())
     {
         wait_key();