Build HELLO page tables from unused memory instead of scratch buffer

src/hulk/bootinfo.d

@@ -33,6 +33,7 @@ struct BootInfo
         enum Type
         {
             Reserved,
+            Bootloader,
             Conventional,
             Unusable,
             ACPIReclaim,
@@ -68,12 +69,6 @@ struct BootInfo
     /* Physical address of stack while jumping to HULK. */
     ulong stack_phys;
 
-    /* Physical address of page tables while jumping to HULK. */
-    ulong pt_phys;
-
-    /* Size of page tables while jumping to HULK. */
-    ulong pt_size;
-
     /* Physical address of ACPI XSDT table. */
     ulong acpi_xsdt_phys;
 }

src/hulk/hippo.d

@@ -53,12 +53,11 @@ struct hippo
     public static void initialize(HulkHeader * header)
     {
         size_t usable_memory;
-        ulong[2][5] reserved = [
+        ulong[2][4] reserved = [
             [header.bootinfo.hulk_phys, cast(ulong)header.total_size - LinkerAddresses.hulk_bss_size],
             [header.bootinfo.bss_phys, LinkerAddresses.hulk_bss_size],
             [header.bootinfo.stack_phys, header.stack_size],
             [cast(ulong)header.bootinfo.fb.buffer, header.bootinfo.fb.height * header.bootinfo.fb.stride * 4u],
-            [header.bootinfo.pt_phys, header.bootinfo.pt_size],
         ];
         for (size_t ri = 0u; ri < reserved.length; ri++)
         {
@@ -66,7 +65,8 @@ struct hippo
         }
         for (size_t bii = 0u; bii < header.bootinfo.memory_map_count; bii++)
         {
-            if (header.bootinfo.memory_map[bii].type == BootInfo.MemoryRegion.Type.Conventional)
+            if ((header.bootinfo.memory_map[bii].type == BootInfo.MemoryRegion.Type.Bootloader) ||
+                (header.bootinfo.memory_map[bii].type == BootInfo.MemoryRegion.Type.Conventional))
             {
                 ulong phys = header.bootinfo.memory_map[bii].base;
                 ulong phys_end = phys + header.bootinfo.memory_map[bii].size;