Applied patch set 6 by Ben, derived from Anthony's megapatch, and minor

[pintos-anon] / src / threads / palloc.c

diff --git a/src/threads/palloc.c b/src/threads/palloc.c
index eab41e4811b15d074acf74ab27592d9eb56bb678..ddbfeda1cdecaa511b775aa3f7ccd9f5ea043c99 100644 (file)
--- a/src/threads/palloc.c
+++ b/src/threads/palloc.c
@@ -7,7 +7,6 @@
 #include <stdint.h>
 #include <stdio.h>
 #include <string.h>
-#include "threads/init.h"
 #include "threads/loader.h"
 #include "threads/synch.h"
 #include "threads/vaddr.h"
@@ -43,17 +42,14 @@ size_t user_page_limit = SIZE_MAX;
 static void init_pool (struct pool *, void *base, size_t page_cnt,
                        const char *name);
 static bool page_from_pool (const struct pool *, void *page);
+static void page_set_cache(void* page, bool enable_cache);
 
 /* Initializes the page allocator. */
 void
 palloc_init (void) 
 {
-  /* End of the kernel as recorded by the linker.
-     See kernel.lds.S. */
-  extern char _end;
-
-  /* Free memory. */
-  uint8_t *free_start = pg_round_up (&_end);
+  /* Free memory starts at 1 MB and runs to the end of RAM. */
+  uint8_t *free_start = ptov (1024 * 1024);
   uint8_t *free_end = ptov (ram_pages * PGSIZE);
   size_t free_pages = (free_end - free_start) / PGSIZE;
   size_t user_pages = free_pages / 2;