src/video/fbcon/SDL_fbvideo.c
branchSDL-1.2
changeset 3917 8a3a0f1179f3
parent 1837 6987e947c77a
child 3923 0dd8bdf173e2
--- a/src/video/fbcon/SDL_fbvideo.c	Thu Feb 15 11:06:22 2007 +0000
+++ b/src/video/fbcon/SDL_fbvideo.c	Thu Feb 15 23:50:45 2007 +0000
@@ -149,6 +149,19 @@
                                   struct fb_var_screeninfo *vinfo);
 static void FB_RestorePalette(_THIS);
 
+static int SDL_getpagesize(void)
+{
+#ifdef HAVE_GETPAGESIZE
+	return getpagesize();
+#elif defined(PAGE_SIZE)
+	return PAGE_SIZE;
+#else
+#error Can not determine system page size.
+	return 4096;  /* this is what it USED to be in Linux... */
+#endif
+}
+
+
 /* Small wrapper for mmap() so we can play nicely with no-mmu hosts
  * (non-mmu hosts disallow the MAP_SHARED flag) */
 
@@ -466,6 +479,7 @@
 
 static int FB_VideoInit(_THIS, SDL_PixelFormat *vformat)
 {
+	const int pagesize = SDL_getpagesize();
 	struct fb_fix_screeninfo finfo;
 	struct fb_var_screeninfo vinfo;
 	int i, j;
@@ -547,7 +561,7 @@
 
 	/* Memory map the device, compensating for buggy PPC mmap() */
 	mapped_offset = (((long)finfo.smem_start) -
-	                (((long)finfo.smem_start)&~(PAGE_SIZE-1)));
+	                (((long)finfo.smem_start)&~(pagesize-1)));
 	mapped_memlen = finfo.smem_len+mapped_offset;
 	mapped_mem = do_mmap(NULL, mapped_memlen,
 	                  PROT_READ|PROT_WRITE, MAP_SHARED, console_fd, 0);