Move interrupt count into seperate variable

1 files changed, 6 insertions, 3 deletions

diff --git a/arch/x86_64/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp b/arch/x86_64/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp
index 9b62110..80f01a8 100644
--- a/arch/x86_64/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp
+++ b/arch/x86_64/src/context_switching/interrupt_descriptor_table/interrupt_descriptor_table.cpp
@@ -8,17 +8,20 @@ namespace teachos::arch::context_switching::interrupt_descriptor_table
 {
   namespace
   {
+    /// @brief Amount of currently reserved interrupt indicies.
+    /// See https://wiki.osdev.org/Interrupt_Descriptor_Table#IDT_items for more information.
+    constexpr uint8_t RESERVED_INTERRUPT_COUNT = 32U;
+
     auto create_interrupt_descriptor_table() -> interrupt_descriptor_table
     {
-      // Only account for the reserved Vectors for now (0 - 31)
-      interrupt_descriptor_table interrupt_descriptor_table{32};
+      interrupt_descriptor_table interrupt_descriptor_table{RESERVED_INTERRUPT_COUNT};
 
       uint64_t offset = reinterpret_cast<uint64_t>(interrupt_handling::generic_interrupt_handler);
       segment_selector selector{1U, segment_selector::REQUEST_LEVEL_KERNEL};
       ist_offset ist{0U};
       idt_flags flags{idt_flags::DESCRIPTOR_LEVEL_KERNEL | idt_flags::INTERRUPT_GATE | idt_flags::PRESENT};
 
-      for (std::size_t i = 0; i < 32; i++)
+      for (std::size_t i = 0; i < interrupt_descriptor_table.size(); i++)
       {
         interrupt_descriptor_table.at(i) = {selector, ist, flags, offset};
       }