New patch to review for coreboot: cdf9c9b memranges: add memranges_update_tag() functionality

[Aaron Durbin]

Aaron Durbin ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5150

-gerrit

commit cdf9c9b4c84f27207b10f6778e6df688b8deb9fe
Author: Aaron Durbin 
Date:   Wed Feb 5 15:44:30 2014 -0600

memranges: add memranges_update_tag() functionality

The memranges_update_tag() function replaces all instances
    that are tagged with old_tag and update to new_tag. This
    can be helpful in the MTRR code by adjusting the address
    space if certain memory types cause the MTRR usage to
    become too large.

Change-Id: Ie5c405204de2fdd9fd1dd5d6190b223925d6d318
    Signed-off-by: Aaron Durbin 
---
 src/include/memrange.h |  4 ++++
 src/lib/memrange.c     | 13 +++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/src/include/memrange.h b/src/include/memrange.h
index 0e69b2f..4f094f5 100644
--- a/src/include/memrange.h
+++ b/src/include/memrange.h
@@ -110,6 +110,10 @@ void memranges_create_hole(struct memranges *ranges,
 void memranges_insert(struct memranges *ranges,
                       resource_t base, resource_t size, unsigned long tag);

+/* Update all entries with old_tag to new_tag. */
+void memranges_update_tag(struct memranges *ranges, unsigned long old_tag,
+                          unsigned long new_tag);
+
 /* Returns next entry after the provided entry. NULL if r is last. */
 struct range_entry *memranges_next_entry(struct memranges *ranges,
                                          const struct range_entry *r);
diff --git a/src/lib/memrange.c b/src/lib/memrange.c
index af56e72..0ebac05 100644
--- a/src/lib/memrange.c
+++ b/src/lib/memrange.c
@@ -204,6 +204,19 @@ static void merge_add_memranges(struct memranges *ranges,
    merge_neighbor_entries(ranges);
 }

+void memranges_update_tag(struct memranges *ranges, unsigned long old_tag,
+                          unsigned long new_tag)
+{
+	struct range_entry *r;
+
+	memranges_each_entry(r, ranges) {
+		if (range_entry_tag(r) == old_tag)
+			range_entry_update_tag(r, new_tag);
+	}
+
+	merge_neighbor_entries(ranges);
+}
+
 typedef void (*range_action_t)(struct memranges *ranges,
                                resource_t begin, resource_t end,
                                unsigned long tag);