Changeset 95e882d in mainline

Timestamp:

2011-11-13T22:11:13Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

e6a6c02

Parents:

ddcc8a0

Message:

Introduce FRAME_LOWMEM and ZONE_LOWMEM flags.

File:

• kernel/generic/include/mm/frame.h (modified) (2 diffs)

kernel/generic/include/mm/frame.h

@@ -58 +58 @@
 /** Do not reserve / unreserve memory. */
 #define FRAME_NO_RESERVE  0x8
+/** Allocate a frame which can be identity-mapped. */
+#define FRAME_LOWMEM      0x10
 
 typedef uint8_t zone_flags_t;
@@ -67 +69 @@
 /** Zone is used by firmware (not available for allocation) */
 #define ZONE_FIRMWARE   0x10
+/** Zone contains memory that can be identity-mapped */
+#define ZONE_LOWMEM     0x20
 
-/** Currently there is no equivalent zone flags
-    for frame flags */
-#define FRAME_TO_ZONE_FLAGS(frame_flags)  0
+#define FRAME_TO_ZONE_FLAGS(ff) (((ff) & FRAME_LOWMEM) ? ZONE_LOWMEM : 0) 
 
 typedef struct {