From b1a912a8a6ff472a49b2e0a09cfd433adfc2cb24 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji@benjidial.net>
Date: Sat, 18 May 2024 21:53:38 -0400
Subject: reorganization, cross compiler

---
 kernel/source/utility.cpp | 51 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 kernel/source/utility.cpp

(limited to 'kernel/source/utility.cpp')

diff --git a/kernel/source/utility.cpp b/kernel/source/utility.cpp
new file mode 100644
index 0000000..12e88fd
--- /dev/null
+++ b/kernel/source/utility.cpp
@@ -0,0 +1,51 @@
+#include <hilbert/kernel/utility.hpp>
+
+void *operator new(size_t, void *ptr) {
+  return ptr;
+}
+
+void operator delete(void *, void *) {}
+
+namespace hilbert::kernel::utility {
+
+  void mark_bitmap_region_zero(
+      uint64_t *bitmap, uint64_t start_i, uint64_t end_i) {
+
+    if (start_i % 64 != 0) {
+      uint64_t keep = (1 << (start_i % 64)) - 1;
+      bitmap[start_i / 64] &= keep;
+      start_i = (start_i / 64 + 1) * 64;
+    }
+
+    if (end_i % 64 != 0) {
+      uint64_t replace = (1 << (end_i % 64)) - 1;
+      bitmap[end_i / 64] &= ~replace;
+      end_i = (end_i / 64) * 64;
+    }
+
+    for (uint64_t i = start_i / 64; i < end_i / 64; ++i)
+      bitmap[i] = 0;
+
+  }
+
+  void mark_bitmap_region_one(
+      uint64_t *bitmap, uint64_t start_i, uint64_t end_i) {
+
+    if (start_i % 64 != 0) {
+      uint64_t keep = (1 << (start_i % 64)) - 1;
+      bitmap[start_i / 64] |= ~keep;
+      start_i = (start_i / 64 + 1) * 64;
+    }
+
+    if (end_i % 64 != 0) {
+      uint64_t replace = (1 << (end_i % 64)) - 1;
+      bitmap[end_i / 64] |= replace;
+      end_i = (end_i / 64) * 64;
+    }
+
+    for (uint64_t i = start_i / 64; i < end_i / 64; ++i)
+      bitmap[i] = 0xffffffffffffffff;
+
+  }
+
+}
-- 
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