X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/0067bc210e621ccda286092d081a7890d65e1c18..9eed27f6f2f002145667fb4abfc5e476b53630e5:/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 8318eaa..433ecfc 100644
--- a/lunaix-os/includes/lunaix/mm/mm.h
+++ b/lunaix-os/includes/lunaix/mm/mm.h
@@ -3,45 +3,89 @@
 
 #include <lunaix/ds/llist.h>
 #include <lunaix/ds/mutex.h>
+#include <lunaix/fs.h>
+#include <lunaix/types.h>
 
-typedef struct 
-{
-    void* start;
-    void* brk;
-    void* max_addr;
-    mutex_t lock;
-} heap_context_t;
+#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
- * 
+ * @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
- * 
+ * @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 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_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)
 
-#define REGION_PERM_MASK  0x1c
-#define REGION_READ       (1 << 2)
-#define REGION_WRITE      (1 << 3)
-#define REGION_EXEC       (1 << 4)
-#define REGION_RW         REGION_READ | REGION_WRITE
+struct proc_mm;
 
 struct mm_region
 {
-    struct llist_header head;
-    unsigned long start;
-    unsigned long end;
-    unsigned int attr;
+    struct llist_header head; // must be first field!
+    struct proc_mm* proc_vms;
+
+    // file mapped to this region
+    struct v_file* mfile;
+    // mapped file offset
+    off_t foff;
+    // mapped file length
+    u32_t flen;
+
+    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*);
+};
+
+static inline void
+mm_index(void** index, struct mm_region* target)
+{
+    *index = (void*)target;
+    target->index = index;
+}
+
+typedef struct llist_header vm_regions_t;
+
+struct proc_mm
+{
+    vm_regions_t regions;
+    struct mm_region* heap;
+    struct mm_region* stack;
+    pid_t pid;
 };
 
 #endif /* __LUNAIX_MM_H */