Changeset 8bdcffa in mainline

Timestamp:

2011-11-15T00:03:30Z (12 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

c6f1908e

Parents:

e6a6c02

Message:

Add zone_external_conf_alloc() to automate allocation of external
zone configuration frames.

Location:

kernel/generic

Files:

• include/mm/frame.h (modified) (1 diff)
• src/mm/frame.c (modified) (1 diff)

kernel/generic/include/mm/frame.h

@@ -163 +163 @@
 extern void frame_mark_unavailable(pfn_t, size_t);
 extern size_t zone_conf_size(size_t);
+extern pfn_t zone_external_conf_alloc(size_t);
 extern bool zone_merge(size_t, size_t);
 extern void zone_merge_all(void);

kernel/generic/src/mm/frame.c

@@ -865 +865 @@
 {
         return (count * sizeof(frame_t) + buddy_conf_size(fnzb(count)));
+}
+
+/** Allocate external configuration frames from low memory. */
+pfn_t zone_external_conf_alloc(size_t count)
+{
+        size_t size = zone_conf_size(count);
+        size_t order = ispwr2(size) ? fnzb(size) : (fnzb(size) + 1);
+
+        return ADDR2PFN((uintptr_t) frame_alloc(order, FRAME_LOWMEM));
 }