Changeset 7b43e11 in mainline

Timestamp:

2005-09-18T14:35:38Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

e158717

Parents:

714675b

Message:

Physical memory management work.
Define structures for frame zones and frames.

Add some comments.

Files:

• arch/ia32/include/context.h (modified) (1 diff)
• arch/ia64/include/context.h (modified) (1 diff)
• include/mm/frame.h (modified) (1 diff)
• include/typedefs.h (modified) (1 diff)

arch/ia32/include/context.h

@@ -42 +42 @@
 #define SP_DELTA        (8+STACK_ITEM_SIZE)
 
+/*
+ * Only save registers that must be preserved across
+ * function calls.
+ */
 struct context {
         __u32 sp;

arch/ia64/include/context.h

@@ -51 +51 @@
         (c)->sp = ((__address) stack) + (size) - SP_DELTA;
 
+/*
+ * Only save registers that must be preserved across
+ * function calls.
+ */
 struct context {
 

include/mm/frame.h

@@ -32 +32 @@
 #include <arch/types.h>
 #include <typedefs.h>
+#include <list.h>
+#include <synch/spinlock.h>
 
 #define FRAME_KA        1       /* skip frames conflicting with user address space */
 #define FRAME_PANIC     2       /* panic on failure */
+
+struct frame_zone {
+        link_t fz_link;         /**< link to previous and next frame_zone */
+
+        spinlock_t lock;        /**< this lock protexts everything below */
+        link_t free_head;       /**< list of free frames */
+        link_t busy_head;       /**< list of busy frames */
+        count_t free_count;     /**< frames in free list */
+        count_t busy_count;     /**< frames in busy list */
+        frame_t *frames;        /**< array of frames in this zone */
+        int flags;
+};
+
+struct frame {
+        count_t refcount;       /**< when > 0, the frame is in busy list, otherwise the frame is in free list */
+        link_t link;            /**< link either to frame_zone free or busy list */
+};
+
+extern spinlock_t frame_zone_head_lock;         /**< this lock protects frame_zone_head list */
+extern link_t frame_zone_head;                  /**< list of all frame_zone's in the system */
 
 extern count_t frames;

include/typedefs.h

@@ -64 +64 @@
 typedef struct chunk chunk_t;
 
+typedef struct frame_zone frame_zone_t;
+typedef struct frame frame_t;
+
 typedef enum vm_type vm_type_t;
 typedef struct vm_area vm_area_t;