A bus master might specify the 'aligned' attribute to enforce
a transaction using aligned address. If the address is not
aligned, the accessor will return MEMTX_UNALIGNED_ERROR.
Signed-off-by: Philippe Mathieu-Daudé <phi...@redhat.com>
---
include/exec/memattrs.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h
index 95f2d20d55b..6fe59194e35 100644
--- a/include/exec/memattrs.h
+++ b/include/exec/memattrs.h
@@ -39,6 +39,8 @@ typedef struct MemTxAttrs {
unsigned int requester_id:16;
/* Invert endianness for this page */
unsigned int byte_swap:1;
+ /* Memory access must be aligned */
+ unsigned int aligned:1;
/*
* The following are target-specific page-table bits. These are not
* related to actual memory transactions at all. However, this structure
@@ -66,6 +68,7 @@ typedef struct MemTxAttrs {
#define MEMTX_OK 0
#define MEMTX_ERROR (1U << 0) /* device returned an error */
#define MEMTX_DECODE_ERROR (1U << 1) /* nothing at that address */
+#define MEMTX_UNALIGNED_ERROR (1U << 2) /* address is not aligned */
typedef uint32_t MemTxResult;
#endif
--
2.26.3
