CTAOS v4

SysCore/memory/lib/pde.c

@@ -0,0 +1,36 @@
+#include "pde.h"
+
+void pd_entry_add_attrib (pd_entry* entry, unsigned mask) {
+      *entry |= mask;
+}
+
+void pd_entry_del_attrib (pd_entry* entry, unsigned mask) {
+      *entry &= ~mask;
+}
+
+void pd_entry_set_frame (pd_entry* entry, unsigned address) {
+      *entry = (*entry & ~_I86_PDE_FRAME) | address;
+}
+ 
+unsigned pd_entry_get_frame (pd_entry entry) {
+      return entry&_I86_PDE_FRAME;
+}
+
+unsigned char pd_entry_is_present (pd_entry entry) {
+      return (entry & _I86_PDE_PRESENT);
+}
+
+unsigned char pd_entry_is_user (pd_entry entry) {
+      return (entry & _I86_PDE_USER);
+}
+ 
+unsigned char pd_entry_is_4mb (pd_entry entry) {
+      return (entry & _I86_PDE_4MB);
+}
+ 
+unsigned char pd_entry_is_writable (pd_entry entry) {
+      return (entry & _I86_PDE_WRITABLE);
+}
+
+void pd_entry_enable_global (pd_entry entry) {
+}

SysCore/memory/lib/pde.h

@@ -0,0 +1,30 @@
+#ifndef __PAGE_DIRECTORY_ENTRY_
+#define __PAGE_DIRECTORY_ENTRY_
+
+enum __PAGE_PDE_FLAGS {
+      _I86_PDE_PRESENT        = 1,
+      _I86_PDE_WRITABLE       = 2,
+      _I86_PDE_USER           = 4,
+      _I86_PDE_PWT            = 8,
+      _I86_PDE_PCD            = 0x10,
+      _I86_PDE_ACCESSED       = 0x20,
+      _I86_PDE_DIRTY          = 0x40,
+      _I86_PDE_4MB            = 0x80,
+      _I86_PDE_CPU_GLOBAL     = 0x100,
+      _I86_PDE_LV4_GLOBAL     = 0x200,
+      _I86_PDE_FRAME          = 0x7FFFF000
+      };
+      
+typedef unsigned pd_entry;
+
+extern void pd_entry_add_attrib (pd_entry* entry, unsigned mask);
+extern void pd_entry_del_attrib (pd_entry* entry, unsigned mask);
+extern void pd_entry_set_frame (pd_entry* entry, unsigned address);
+extern unsigned pd_entry_get_frame (pd_entry entry);
+
+extern unsigned char pd_entry_is_present (pd_entry entry);
+extern unsigned char pd_entry_is_user (pd_entry entry);
+extern unsigned char pd_entry_is_4mb (pd_entry entry);
+extern unsigned char pd_entry_is_writable (pd_entry entry);
+extern void pd_entry_enable_global (pd_entry entry);
+#endif

SysCore/memory/lib/pte.c

@@ -0,0 +1,25 @@
+#include "pte.h"
+
+void pt_entry_add_attrib (pt_entry* entry, unsigned mask) {
+      *entry |= mask;
+}
+
+ void pt_entry_del_attrib (pt_entry* entry, unsigned mask) {
+      *entry &= ~mask;
+}
+
+ void pt_entry_set_frame (pt_entry* entry, unsigned address) {
+      *entry = (*entry & ~_I86_PTE_FRAME) | address;
+ }
+ 
+ unsigned pt_entry_get_frame (pt_entry entry) {
+      return (entry & _I86_PTE_FRAME);
+}
+
+ unsigned char pt_entry_is_present (pt_entry entry) {
+      return (entry & _I86_PTE_PRESENT);
+ }
+ 
+ unsigned char pt_entry_is_writable (pt_entry entry) {
+      return (entry & _I86_PTE_WRITABLE);
+}

SysCore/memory/lib/pte.h

@@ -0,0 +1,27 @@
+#ifndef __PAGE_TABLE_ENTRY_
+#define __PAGE_TABLE_ENTRY_
+
+enum __PAGE_FLAGS {
+      _I86_PTE_PRESENT        = 1,
+      _I86_PTE_WRITABLE       = 2,
+      _I86_PTE_USER           = 4,
+      _I86_PTE_WRITETHROUGH   = 8,
+      _I86_PTE_NOT_CACHEABLE  = 0x10,
+      _I86_PTE_ACCESSED       = 0x20,
+      _I86_PTE_DIRTY          = 0x40,
+      _I86_PTE_PAT            = 0x80,
+      _I86_PTE_CPU_GLOBAL     = 0x100,
+      _I86_PTE_LV4_GLOBAL     = 0x200,
+      _I86_PTE_FRAME          = 0x7FFFF000
+      };
+      
+typedef unsigned pt_entry;
+
+extern void pt_entry_add_attrib (pt_entry* entry, unsigned mask);
+extern void pt_entry_del_attrib (pt_entry* entry, unsigned mask);
+extern void pt_entry_set_frame (pt_entry* entry, unsigned address);
+extern unsigned pt_entry_get_frame (pt_entry entry);
+
+extern unsigned char pt_entry_is_present (pt_entry entry);
+extern unsigned char pt_entry_is_writable (pt_entry entry);
+#endif