From d934ea6875932a7139eba77bb5248fca8be7fd01 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matteo=20Gm=C3=BCr?= <matteo.gmuer1@ost.ch>
Date: Sun, 20 Oct 2024 08:37:49 +0000
Subject: =?UTF-8?q?Implement=20translate=20page=20in=20a=20big=20brain=20w?=
 =?UTF-8?q?ay=20=F0=9F=A4=AF?=
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---
 arch/x86_64/src/memory/paging/page_table.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'arch/x86_64/src/memory')

diff --git a/arch/x86_64/src/memory/paging/page_table.cpp b/arch/x86_64/src/memory/paging/page_table.cpp
index ab7331a..02ababe 100644
--- a/arch/x86_64/src/memory/paging/page_table.cpp
+++ b/arch/x86_64/src/memory/paging/page_table.cpp
@@ -54,4 +54,12 @@ namespace teachos::arch::memory::paging
     }
     return std::nullopt;
   }
+
+  auto operator--(page_table::level & level, int) -> page_table::level
+  {
+    exception_handling::assert(level != page_table::LEVEL1,
+                               "[Page table] Attemptd to decrement enum to value outside of range");
+    auto value = static_cast<std::underlying_type<page_table::level>::type>(level);
+    return static_cast<page_table::level>(--value);
+  }
 }  // namespace teachos::arch::memory::paging
-- 
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