Starting and testing cmake as a toolchain

* Commented out the map page function call to handle page not present
* Mapped the ACPI_RECLAIMABLE_MEMORY
* Set VBE to false when VBE is not initialized by the bootloader

CMakeLists.txt

@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.16)
+project(BarinkOS LANGUAGES C CXX ASM)
+
+add_subdirectory(CoreLib)
+add_subdirectory(Kernel)

CoreLib/CMakeLists.txt

@@ -0,0 +1,14 @@
+project(CoreLib LANGUAGES CXX)
+
+set(SOURCES
+	ctype.cpp
+	Memory.cpp
+	Path.cpp
+	Stack.cpp
+	String.cpp
+	StringView.cpp
+)
+
+add_library(CoreLib STATIC ${SOURCES})
+
+target_include_directories(CoreLib PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/include)

kernel/CMakeLists.txt

@@ -0,0 +1,13 @@
+
+project(Kernel LANGUAGES C CXX ASM)
+
+set(SOURCES
+	main.cpp
+	boot.s
+)
+
+add_executable(kernel.elf ${SOURCES})
+target_link_libraries(kernel.elf PRIVATE CoreLib)
+set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/link.ld)
+target_link_options(kernel.elf PRIVATE "-T${LINKER_SCRIPT}")
+

kernel/interrupts/idt.cpp

@@ -191,7 +191,7 @@ void irs_handler (registers* regs) {
                 printf("* Page protection violation!\n");
             } else{
                 printf("* Page not-present!\n");
-                Immediate_Map(FaultingAddress, FaultingAddress - 0xC0000000);
+                //Immediate_Map(FaultingAddress, FaultingAddress);
              
             }
 

kernel/prekernel/prekernel.cpp

@@ -2,6 +2,8 @@
 #include <stddef.h>
 #include "multiboot.h"
 #include "../memory/PhysicalMemoryManager.h"
+#include "../memory/VirtualMemoryManager.h"
+#include "../acpi/acpi.h"
 
 #define CHECK_FLAG(flags, bit) ((flags) & (1 <<(bit)))
 #define VADDR_TO_PADDR(vaddr) (vaddr - 0xC0000000)
@@ -10,7 +12,6 @@ BootInfoBlock* BIB;
 
 extern "C" void prekernelSetup  ( unsigned long magic, multiboot_info_t* mbi) 
 {
-
         /*
         * Check Multiboot magic number
         */ 
@@ -21,18 +22,13 @@ extern "C" void prekernelSetup  ( unsigned long magic, multiboot_info_t* mbi)
         }
 
         mbi = PADDR_TO_VADDR(mbi);
-
-        // Setup the physical memory manager immmediatly 
-        // Doing so saves the complications of doing it later when 
-        // paging is enabled 
-
         /*
         If we got a memory map from our bootloader we 
         should be parsing it to find out the memory regions available.
         */
         if (CHECK_FLAG(mbi->flags, 6))
-        {  
-               
+        {
+
                 // Calculate total memory size 
                 uint32_t RAM_size = 0;
                 for(
@@ -56,6 +52,8 @@ extern "C" void prekernelSetup  ( unsigned long magic, multiboot_info_t* mbi)
                                 deallocate_region(mmap->addr, mmap->len);
                         if(mmap->type == MULTIBOOT_MEMORY_ACPI_RECLAIMABLE)
                                 allocate_region(mmap->addr, mmap->len);
+                                // memory map
+                                Immediate_Map(mmap->addr , mmap->addr);
                         if(mmap->type == MULTIBOOT_MEMORY_RESERVED)
                                 allocate_region(mmap->addr, mmap->len);
                         if(mmap->type == MULTIBOOT_MEMORY_NVS)
@@ -99,8 +97,6 @@ extern "C" void prekernelSetup  ( unsigned long magic, multiboot_info_t* mbi)
                 uint32_t i;
 
                 BIB->GrubModuleCount = mbi->mods_count;
-
-
                 for(i = 0, mod = (multiboot_module_t *) mbi->mods_addr; i < mbi->mods_count; i++ , mod++){
                         
                 }
@@ -135,6 +131,6 @@ extern "C" void prekernelSetup  ( unsigned long magic, multiboot_info_t* mbi)
 
                    // NOTE: Do something with it.. (Store it , process it etc...)
         } else{
-                BIB->EnabledVBE;
+                BIB->EnabledVBE  = false;
         }
 }

toolchain-i686-elf.cmake

@@ -0,0 +1,17 @@
+# toolchain-i686-elf.cmake
+set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_SYSTEM_PROCESSOR i686)
+
+# Point to your custom cross tools
+set(CMAKE_C_COMPILER /opt/cross/bin/i686-elf-gcc)
+set(CMAKE_CXX_COMPILER /opt/cross/bin/i686-elf-g++)
+set(CMAKE_ASM_COMPILER /opt/cross/bin/i686-elf-as)
+set(CMAKE_AR /opt/cross/bin/i686-elf-ar)
+set(CMAKE_RANLIB /opt/cross/bin/i686-elf-ranlib)
+set(CMAKE_C_COMPILER_WORKS TRUE)
+set(CMAKE_CXX_COMPILER_WORKS TRUE)
+
+# Flags for freestanding OS development
+set(CMAKE_C_FLAGS "-ffreestanding -Og -ggdb -Wall -Wextra")
+set(CMAKE_CXX_FLAGS "-ffreestanding -Og -ggdb -Wall -Wextra")
+