Finally Fix Paging!

src/kernel/arch/i686/util.asm

@@ -11,7 +11,6 @@ Reboot:
     in          al, 0x64
     test        al, 0x02
     jnz         Reboot
-
     mov         al, 0xFC
     out         0x64, al
 
@@ -42,11 +41,6 @@ Write_CR3:
 	mov ebp, esp
 	mov eax, [ebp+8]
 	mov cr3, eax
+	mov esp, ebp
 	pop ebp
 	retn
-
-global Enable_Paging
-Enable_Paging:
-	mov eax, cr4
-	or eax, 0x00000010
-	mov cr4, eax

src/kernel/arch/i686/util.h

@@ -8,8 +8,7 @@
 #include <stdint.h>
 
 void __attribute__((cdecl)) Reboot();
-unsigned long __attribute__((cdecl)) Read_CR0();
-void __attribute__((cdecl)) Write_CR0(unsigned long value);
-unsigned long* __attribute__((cdecl)) Read_CR3();
-void __attribute__((cdecl)) Write_CR3(unsigned long* value);
-void __attribute__((cdecl)) Enable_Paging();
+uint32_t __attribute__((cdecl)) Read_CR0();
+void __attribute__((cdecl)) Write_CR0(uint32_t value);
+uint32_t* __attribute__((cdecl)) Read_CR3();
+void __attribute__((cdecl)) Write_CR3(uint32_t* value);

src/kernel/core/memory/page.c

@@ -12,29 +12,28 @@
 
 extern uint16_t DEBUG_COM_PORT;
 
-unsigned long* Page_Directory = (unsigned long*) 0x9C000;
-unsigned long* Page_Table = (unsigned long*) 0x9D000;
+uint32_t Page_Directory[1024] __attribute__((aligned(4096)));
+uint32_t Page_Table[1024] __attribute__((aligned(4096)));
 
 void Memory_Page_Init()
 {
     unsigned long address = 0;
-    unsigned int i;
+    unsigned int PDi;
 
-    Serial_Printf(DEBUG_COM_PORT, "MEMORY:> Mapping First 4MB of Memory.\n");
-    for(i=0; i<1024; i++) {
-    Page_Table[i] = address | 3;
-    address = address + 4096; // 4096 = 4kb
+    Serial_Printf(DEBUG_COM_PORT, "MEMORY:> Inititalizing Memory Paging\n");
+    // Set entries to not Present
+    for(PDi=0; PDi<1024; PDi++) {
+        Page_Directory[PDi] = 0x00000002;
     }
-    Serial_Printf(DEBUG_COM_PORT, "MEMORY:> Inititalizing Page Directory and Table.\n");
+    // Set R/W + Supervisor Flags For Table
+    unsigned int PTi;
+    for(PTi=0; PTi<1024; PTi++) {
+        Page_Table[PTi] = (PTi * 0x1000) | 3;
+    }
+    // Add Table to Directory & Set R/W Supervisor
+    Page_Directory[0] = ((unsigned int)Page_Table) | 3;
 
-    // fill the first entry of the page directory
-    Page_Directory[0] = *Page_Table;
-    Page_Directory[0] = Page_Directory[0] | 3; // attribute set to: supervisor level, read/write
-    for(i=1; i<1024; i++) {
-    Page_Directory[i] = 0 | 2; // attribute set to: supervisor level, read/write
-    }
-    // Enable_Paging();
+    // Enable Paging
     Write_CR3(Page_Directory);
-    Write_CR0(Read_CR0() | 0x60000001); // set the paging bit in CR0 to 1 
-    /* Holy Shit i Fixed Paging */
+    Write_CR0(Read_CR0() | 0x80000000);
 }

src/kernel/version.h

@@ -6,4 +6,4 @@
 #pragma once
 
 #define LOGO "    _   _____    _   __________________\n   / | / /   |  / | / /  _/_  __/ ____/\n  /  |/ / /| | /  |/ // /  / / / __/   \n / /|  / ___ |/ /|  // /  / / / /___   \n/_/ |_/_/  |_/_/ |_/___/ /_/ /_____/   \n"
-#define VERSION "RD-00051"
+#define VERSION "RD-00052"