A Total Overhaul on the Lunaix's Virtual Memory Model (#26)

[lunaix-os.git] / lunaix-os / includes / lunaix / mm / mm.h

diff --git a/lunaix-os/includes/lunaix/mm/mm.h b/lunaix-os/includes/lunaix/mm/mm.h
index 07d3d791df3f12fa05c6bbc52a6a7c11d5bc1243..d5b8edd40b6fa41ac0fa8f3cf650f2fdcff99e90 100644 (file)
--- a/lunaix-os/includes/lunaix/mm/mm.h
+++ b/lunaix-os/includes/lunaix/mm/mm.h
@@ -1,60 +1,74 @@
 #ifndef __LUNAIX_MM_H
 #define __LUNAIX_MM_H
 
-#include <lunaix/ds/llist.h>
-#include <lunaix/ds/mutex.h>
-#include <lunaix/fs.h>
 #include <lunaix/types.h>
+#include <lunaix/ds/llist.h>
 
-typedef struct
-{
-    void* start;
-    void* brk;
-    void* max_addr;
-    mutex_t lock;
-} heap_context_t;
+#include <sys/mm/memory.h>
+
+#include <usr/lunaix/mann_flags.h>
 
 /**
  * @brief 私有区域，该区域中的页无法进行任何形式的共享。
  *
  */
-#define REGION_PRIVATE 0x0
+#define REGION_PRIVATE MAP_EXCLUSIVE
 
 /**
  * @brief
  * 读共享区域，该区域中的页可以被两个进程之间读共享，但任何写操作须应用Copy-On-Write
+ * 等价于 POSIX 的 MAP_PRIVATE
  *
  */
-#define REGION_RSHARED 0x1
+#define REGION_RSHARED MAP_PRIVATE
 
 /**
  * @brief
  * 写共享区域，该区域中的页可以被两个进程之间读共享，任何的写操作无需执行Copy-On-Write
- *
+ * 等价于 POSIX 的 MAP_SHARED
  */
-#define REGION_WSHARED 0x2
+#define REGION_WSHARED MAP_SHARED
 
 #define REGION_PERM_MASK 0x1c
 #define REGION_MODE_MASK 0x3
 
-#define REGION_READ (1 << 2)
-#define REGION_WRITE (1 << 3)
-#define REGION_EXEC (1 << 4)
+#define REGION_READ PROT_READ
+#define REGION_WRITE PROT_WRITE
+#define REGION_EXEC PROT_EXEC
+#define REGION_ANON MAP_ANON
 #define REGION_RW REGION_READ | REGION_WRITE
+#define REGION_KERNEL (1 << 31)
 
-#define REGION_TYPE_CODE (1 << 16);
-#define REGION_TYPE_GENERAL (2 << 16);
-#define REGION_TYPE_HEAP (3 << 16);
-#define REGION_TYPE_STACK (4 << 16);
+#define REGION_TYPE_CODE (1 << 16)
+#define REGION_TYPE_GENERAL (2 << 16)
+#define REGION_TYPE_HEAP (3 << 16)
+#define REGION_TYPE_STACK (4 << 16)
+#define REGION_TYPE_VARS (5 << 16)
 
 struct mm_region
 {
-    struct llist_header head;
+    struct llist_header head; // must be first field!
+    struct proc_mm* proc_vms;
+
+    // file mapped to this region
     struct v_file* mfile;
-    u32_t offset;
+    // mapped file offset
+    off_t foff;
+    // mapped file length
+    u32_t flen; // XXX it seems that we don't need this actually..
+
     ptr_t start;
     ptr_t end;
     u32_t attr;
+
+    void** index; // fast reference, to accelerate access to this very region.
+
+    void* data;
+    // when a region is copied
+    void (*region_copied)(struct mm_region*);
+    // when a region is unmapped
+    void (*destruct_region)(struct mm_region*);
 };
 
+
 #endif /* __LUNAIX_MM_H */