Changeset 3772af6 in mainline for kernel/generic/include

Timestamp:

2013-09-09T20:25:27Z (12 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

ee7f78a

Parents:

c501bc4

Message:

remove the special-purpose DMA zone (including the ZONE_DMA and FRAME_DMA flags)
this most probably breaks Sound Blaster 16, but it is reported to be broken anyhow
a proper platform-independent DMA memory allocation is in the works

File:

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

kernel/generic/include/mm/frame.h

@@ -63 +63 @@
 /** Allocate a frame which cannot be identity-mapped. */
 #define FRAME_HIGHMEM     0x20
-/** Allocate a frame which needs to be from DMA zone. */
-#define FRAME_DMA         0x40
 
 typedef uint8_t zone_flags_t;
@@ -79 +77 @@
 /** Zone contains memory that cannot be identity-mapped */
 #define ZONE_HIGHMEM    0x10
-/** Zone contains memory suitable for old ISA DMA */
-#define ZONE_DMA        0x20
 
 /** Mask of zone bits that must be matched exactly. */
 #define ZONE_EF_MASK    0x7
 
-#define FRAME_TO_ZONE_FLAGS(ff) \
-        ((((ff) & FRAME_DMA) ? ZONE_DMA : \
-            (((ff) & FRAME_LOWMEM) ? ZONE_LOWMEM : \
+#define FRAME_TO_ZONE_FLAGS(ff) \
+        ((((ff) & FRAME_LOWMEM) ? ZONE_LOWMEM : \
             (((ff) & FRAME_HIGHMEM) ? ZONE_HIGHMEM : \
-            ZONE_LOWMEM /* | ZONE_HIGHMEM */))) | \
+            ZONE_LOWMEM /* | ZONE_HIGHMEM */)) | \
             ZONE_AVAILABLE)