From 1b65136a11453fe7e89320dfe6170a0cd75e60dd Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Thu, 24 Jul 2025 16:33:10 +0000
Subject: x86_64: clean up hw details

---
 arch/x86_64/src/kernel/cpu/control_register.cpp | 66 -------------------------
 arch/x86_64/src/kernel/cpu/tlb.cpp              | 16 ------
 2 files changed, 82 deletions(-)
 delete mode 100644 arch/x86_64/src/kernel/cpu/control_register.cpp
 delete mode 100644 arch/x86_64/src/kernel/cpu/tlb.cpp

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

diff --git a/arch/x86_64/src/kernel/cpu/control_register.cpp b/arch/x86_64/src/kernel/cpu/control_register.cpp
deleted file mode 100644
index 41b8cd7..0000000
--- a/arch/x86_64/src/kernel/cpu/control_register.cpp
+++ /dev/null
@@ -1,66 +0,0 @@
-#include "arch/kernel/cpu/control_register.hpp"
-
-#include "arch/exception_handling/panic.hpp"
-
-#include <type_traits>
-
-namespace teachos::arch::kernel::cpu
-{
-  auto read_control_register(control_register cr) -> uint64_t
-  {
-    uint64_t current_value;
-    switch (cr)
-    {
-      case control_register::CR0:
-        asm volatile("mov %%cr0, %[output]" : [output] "=r"(current_value));
-        break;
-      case control_register::CR2:
-        asm volatile("mov %%cr2, %[output]" : [output] "=r"(current_value));
-        break;
-      case control_register::CR3:
-        asm volatile("mov %%cr3, %[output]" : [output] "=r"(current_value));
-        break;
-      case control_register::CR4:
-        asm volatile("mov %%cr4, %[output]" : [output] "=r"(current_value));
-        break;
-    }
-    return current_value;
-  }
-
-  auto write_control_register(control_register cr, uint64_t new_value) -> void
-  {
-    switch (cr)
-    {
-      case control_register::CR0:
-        asm volatile("mov %[input], %%cr0"
-                     : /* no output from call */
-                     : [input] "r"(new_value)
-                     : "memory");
-        break;
-      case control_register::CR2:
-        asm volatile("mov %[input], %%cr2"
-                     : /* no output from call */
-                     : [input] "r"(new_value)
-                     : "memory");
-        break;
-      case control_register::CR3:
-        asm volatile("mov %[input], %%cr3"
-                     : /* no output from call */
-                     : [input] "r"(new_value)
-                     : "memory");
-        break;
-      case control_register::CR4:
-        asm volatile("mov %[input], %%cr4"
-                     : /* no output from call */
-                     : [input] "r"(new_value)
-                     : "memory");
-        break;
-    }
-  }
-
-  auto set_cr0_bit(cr0_flags flag) -> void
-  {
-    auto const cr0 = read_control_register(control_register::CR0);
-    write_control_register(control_register::CR0, static_cast<std::underlying_type<cr0_flags>::type>(flag) | cr0);
-  }
-}  // namespace teachos::arch::kernel::cpu
diff --git a/arch/x86_64/src/kernel/cpu/tlb.cpp b/arch/x86_64/src/kernel/cpu/tlb.cpp
deleted file mode 100644
index a09001c..0000000
--- a/arch/x86_64/src/kernel/cpu/tlb.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-#include "arch/kernel/cpu/tlb.hpp"
-
-#include "arch/kernel/cpu/control_register.hpp"
-
-namespace teachos::arch::kernel::cpu
-{
-  auto tlb_flush(memory::paging::virtual_address address) -> void
-  {
-    asm volatile("invlpg (%[input])" : /* no output from call */ : [input] "r"(address) : "memory");
-  }
-
-  auto tlb_flush_all() -> void
-  {
-    write_control_register(cpu::control_register::CR3, read_control_register(cpu::control_register::CR3));
-  }
-}  // namespace teachos::arch::kernel::cpu
-- 
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