[Suspend2][ 5/7] [Suspend2] Serialise pageflags.

[Nigel Cunningham <nigel@suspend2.net>]

Routines for serialising pageflags in an image header.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/pageflags.c |   74 ++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 74 insertions(+), 0 deletions(-)

diff --git a/kernel/power/pageflags.c b/kernel/power/pageflags.c
index 7c00257..0b019de 100644
--- a/kernel/power/pageflags.c
+++ b/kernel/power/pageflags.c
@@ -56,3 +56,77 @@ int suspend_pageflags_space_needed(void)
 	return total;
 }
 
+/* save_dyn_pageflags
+ *
+ * Description: Save a set of pageflags.
+ * Arguments:   dyn_pageflags_t *: Pointer to the bitmap being saved.
+ */
+
+void save_dyn_pageflags(dyn_pageflags_t pagemap)
+{
+	int i, zone_num = 0;
+	struct zone *zone;
+
+	if (!*pagemap)
+		return;
+
+	for_each_zone(zone) {
+		int size = pages_for_zone(zone);
+
+		suspend_active_writer->rw_header_chunk(WRITE, NULL,
+				(char *) &zone_num, sizeof(int));
+		suspend_active_writer->rw_header_chunk(WRITE, NULL,
+				(char *) &size, sizeof(int));
+
+		for (i = 0; i < size; i++)
+			suspend_active_writer->rw_header_chunk(WRITE, NULL,
+				(char *) pagemap[zone_num][i], PAGE_SIZE);
+		zone_num++;
+	}
+	zone_num = -1;
+	suspend_active_writer->rw_header_chunk(WRITE, NULL,
+			(char *) &zone_num, sizeof(int));
+}
+
+/* load_dyn_pageflags
+ *
+ * Description: Load a set of pageflags.
+ * Arguments:   dyn_pageflags_t *: Pointer to the bitmap being loaded.
+ *              (It must be allocated before calling this routine).
+ */
+
+void load_dyn_pageflags(dyn_pageflags_t pagemap)
+{
+	int i, zone_num = 0, zone_check = 0;
+	struct zone *zone;
+
+	if (!pagemap)
+		return;
+
+	for_each_zone(zone) {
+		int size = 0;
+		suspend_active_writer->rw_header_chunk(READ, NULL,
+				(char *) &zone_check, sizeof(int));
+		if (zone_check != zone_num) {
+			printk("Zone check (%d) != zone_num (%d).\n",
+					zone_check, zone_num);
+			BUG();
+		}
+		suspend_active_writer->rw_header_chunk(READ, NULL,
+				(char *) &size, sizeof(int));
+
+		for (i = 0; i < size; i++)
+			suspend_active_writer->rw_header_chunk(READ, NULL,
+					(char *) pagemap[zone_num][i],
+					PAGE_SIZE);
+		zone_num++;
+	}
+	suspend_active_writer->rw_header_chunk(READ, NULL, (char *) &zone_check,
+			sizeof(int));
+	if (zone_check != -1) {
+		printk("Didn't read end of dyn pageflag data marker.(%x)\n",
+				zone_check);
+		BUG();
+	}
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net