virtual memory manager contiuned

1 files changed, 81 insertions, 1 deletions

diff --git a/kernel/vmem.c b/kernel/vmem.c
index 4424edf..ecdf9cd 100644
--- a/kernel/vmem.c
+++ b/kernel/vmem.c
@@ -40,6 +40,9 @@ typedef uint32_t pd_entry;
 
 //! virtual address
 typedef uint32_t virtual_addr;
+typedef uint32_t physical_addr;
+
+typedef uint8_t bool;
  
 //! i86 architecture defines 1024 entries per table--do not change
 #define PAGES_PER_TABLE 1024
@@ -70,7 +73,84 @@ struct pdirectory {
     pd_entry m_entries[PAGES_PER_DIR];
 };
 
+void 		pt_entry_add_attrib (pt_entry* e, uint32_t attrib)
+{
+}
+void 		pt_entry_del_attrib (pt_entry* e, uint32_t attrib)
+{
+}
+void 		pt_entry_set_frame (pt_entry* e , physical_addr addr)
+{
+}
+bool 		pt_entry_is_present (pt_entry e)
+{
+    return 1;
+}
+bool 		pt_entry_is_writable (pt_entry e)
+{
+    return 1;
+}
+physical_addr	pt_entry_pfn (pt_entry e)
+{
+    return 1;
+}
+
+void		pd_entry_add_attrib (pd_entry* e, uint32_t attrib)
+{
+}
+
+void		pd_entry_del_attrib (pd_entry* e, uint32_t attrib)
+{
+}
+void		pd_entry_set_frame (pd_entry* e, physical_addr add)
+{
+}
+bool		pd_entry_is_present (pd_entry e)
+{
+    return 1;
+}
+bool		pd_entry_is_user (pd_entry e)
+{
+    return 1;
+}
+
+bool		pd_entry_is_4mb (pd_entry e)
+{
+    return 1;
+}
+
+bool		pd_entry_is_writable (pd_entry e)
+{
+    return 1;
+}
+
+physical_addr	pd_entry_pfn (pd_entry e)
+{
+    return 1;
+}
+
+void		pd_entry_enable_global (pd_entry e)
+{
+}
+
+uint8_t vmmngr_alloc_page (pt_entry* e) 
+{
+ 
+	//! allocate a free physical frame
+	void* p = pmmngr_alloc_block ();
+	if (!p)
+		return 0;
+ 
+	//! map it to the page
+	pt_entry_set_frame (e, (physical_addr)p);
+	pt_entry_add_attrib (e, I86_PTE_PRESENT);
+
+	return 1;
+}
+
 void vmem_init()
 {
-    scr_put_string_nl("vmem: Init paging (TODO)");
+    scr_put_string_nl("vmem: Init paging\nxxx");
+    int x=10/0;
 }
+