full mmap implementation

1 files changed, 7 insertions, 6 deletions

diff --git a/vm/mmap.h b/vm/mmap.h
index bee364e..09276a7 100644
--- a/vm/mmap.h
+++ b/vm/mmap.h
@@ -10,21 +10,22 @@
 struct mmap_table
 {
   struct mmap_table_entry **ids;
-  int id_free;    /* lowest-index free */
-  int id_max;     /* highest-index used */
-  int id_cap;     /* mmap table capacity */
+  int id_free;        /* lowest-index free */
+  int id_max;         /* highest-index used */
+  int id_cap;         /* mmap table capacity */
 };
 
 /* a single entry in the mmap table */
 struct mmap_table_entry
 {
-  void *addr;
-  struct file *file;
+  uint8_t *upage;     /* virtual address of first page of mmapped file */
+  struct file *file;  /* file handle */
+  int pages;          /* number of pages the mapping needs */
 };
 
 bool mmap_table_init (struct mmap_table *table);
 void mmap_table_free (struct mmap_table *table);
-mapid_t mmap_table_insert (struct mmap_table *table, void *addr,
+mapid_t mmap_table_insert (struct mmap_table *table, uint8_t *upage,
     struct file *file, off_t len);
 bool mmap_table_remove (struct mmap_table *table, mapid_t mapping);