kernel/tests: implement basic simulated memory

1 files changed, 6 insertions, 2 deletions

diff --git a/kernel/kapi/memory.cpp b/kernel/kapi/memory.cpp
index 2803d76..06a3165 100644
--- a/kernel/kapi/memory.cpp
+++ b/kernel/kapi/memory.cpp
@@ -125,14 +125,18 @@ namespace kapi::memory
     }
 
     auto const flags = page_mapper::flags::writable | page_mapper::flags::supervisor_only | page_mapper::flags::global;
+    auto bitmap_ptr = static_cast<std::uint64_t *>(nullptr);
 
     std::ranges::for_each(std::views::iota(0uz, bitmap_pages), [&](auto index) {
       auto page = page::containing(pmm_metadata_base + index * page::size);
       auto frame = memory::frame(bitmap_frames->first.number() + index);
-      active_page_mapper->map(page, frame, flags);
+      auto mapped = active_page_mapper->map(page, frame, flags);
+      if (!bitmap_ptr)
+      {
+        bitmap_ptr = reinterpret_cast<std::uint64_t *>(mapped);
+      }
     });
 
-    auto bitmap_ptr = static_cast<std::uint64_t *>(pmm_metadata_base);
     auto bitmap =
         std::span{bitmap_ptr, (bitmap_bytes + kstd::type_size<std::uint64_t> - 1_B) / kstd::type_size<std::uint64_t>};