Kernel: Move Prekernel{CPU, Exceptions}.cpp out of Prekernel directory

This lets us delete the Prekernel.h file, and gets us closer to deleting
the Prekernel from the aarch64 Kernel.

Kernel/Arch/aarch64/CPU.h

@@ -7,3 +7,10 @@
 #pragma once
 
 #define PAGE_MASK (~(FlatPtr)0xfffu)
+
+namespace Prekernel {
+
+void drop_to_exception_level_1();
+void init_prekernel_page_tables();
+
+}

Kernel/Arch/aarch64/Exceptions.cpp

@@ -5,7 +5,7 @@
  */
 
 #include <Kernel/Arch/aarch64/ASM_wrapper.h>
-#include <Kernel/Arch/aarch64/Prekernel/Prekernel.h>
+#include <Kernel/Arch/aarch64/CPU.h>
 #include <Kernel/Arch/aarch64/Registers.h>
 #include <Kernel/Panic.h>
 

Kernel/Arch/aarch64/MMU.cpp

@@ -6,7 +6,7 @@
 
 #include <AK/Types.h>
 
-#include <Kernel/Arch/aarch64/Prekernel/Prekernel.h>
+#include <Kernel/Arch/aarch64/CPU.h>
 
 #include <Kernel/Arch/aarch64/ASM_wrapper.h>
 #include <Kernel/Arch/aarch64/RPi/MMIO.h>

Kernel/Arch/aarch64/Prekernel/Prekernel.h

@@ -1,14 +0,0 @@
-/*
- * Copyright (c) 2021, James Mintram <me@jamesrm.com>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#pragma once
-
-namespace Prekernel {
-
-void drop_to_exception_level_1();
-void init_prekernel_page_tables();
-
-}

Kernel/Arch/aarch64/Processor.cpp

@@ -8,7 +8,6 @@
 
 #include <Kernel/Arch/Processor.h>
 #include <Kernel/Arch/aarch64/ASM_wrapper.h>
-#include <Kernel/Arch/aarch64/Prekernel/Prekernel.h>
 
 extern "C" uintptr_t vector_table_el1;
 

Kernel/Arch/aarch64/init.cpp

@@ -12,7 +12,6 @@
 
 #include <Kernel/Arch/Processor.h>
 #include <Kernel/Arch/aarch64/BootPPMParser.h>
-#include <Kernel/Arch/aarch64/Prekernel/Prekernel.h>
 #include <Kernel/Arch/aarch64/RPi/Framebuffer.h>
 #include <Kernel/Arch/aarch64/RPi/Mailbox.h>
 #include <Kernel/Arch/aarch64/RPi/Timer.h>

Kernel/CMakeLists.txt

@@ -399,8 +399,6 @@ if (NOT "${SERENITY_ARCH}" STREQUAL "aarch64")
 else()
     set(PREKERNEL_SOURCES
         Arch/aarch64/Prekernel/boot.S
-        Arch/aarch64/Prekernel/PrekernelExceptions.cpp
-        Arch/aarch64/Prekernel/PrekernelMMU.cpp
 
         Prekernel/UBSanitizer.cpp
     )
@@ -420,9 +418,11 @@ else()
         Arch/aarch64/BootPPMParser.cpp
         Arch/aarch64/CrashHandler.cpp
         Arch/aarch64/Dummy.cpp
+        Arch/aarch64/Exceptions.cpp
         Arch/aarch64/init.cpp
         Arch/aarch64/kprintf.cpp
         Arch/aarch64/MainIdRegister.cpp
+        Arch/aarch64/MMU.cpp
         Arch/aarch64/PageDirectory.cpp
         Arch/aarch64/Panic.cpp
         Arch/aarch64/Processor.cpp