Replacing size with size+sign+endianness (MemOp) will enable us to
collapse the two byte swaps, adjust_endianness and handle_bswap, along
the I/O path.
While interfaces are converted, callers will have existing unsigned
size coerced into a MemOp, and the callee will use this MemOp as an
unsigned size.
Signed-off-by: Tony Nguyen <tony.ngu...@bt.com>
---
include/exec/memop.h | 4 ++++
include/exec/memory.h | 9 +++++----
memory.c | 7 +++++--
3 files changed, 14 insertions(+), 6 deletions(-)
diff --git a/include/exec/memop.h b/include/exec/memop.h
index ac58066..09c8d20 100644
--- a/include/exec/memop.h
+++ b/include/exec/memop.h
@@ -106,4 +106,8 @@ typedef enum MemOp {
MO_SSIZE = MO_SIZE | MO_SIGN,
} MemOp;
+/* No-op while memory_region_dispatch_[read|write] is converted to MemOp */
+#define MEMOP_SIZE(op) (op) /* MemOp to size. */
+#define SIZE_MEMOP(ul) (ul) /* Size to MemOp. */
+
#endif
diff --git a/include/exec/memory.h b/include/exec/memory.h
index bb0961d..30b1c58 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -19,6 +19,7 @@
#include "exec/cpu-common.h"
#include "exec/hwaddr.h"
#include "exec/memattrs.h"
+#include "exec/memop.h"
#include "exec/ramlist.h"
#include "qemu/queue.h"
#include "qemu/int128.h"
@@ -1731,13 +1732,13 @@ void mtree_info(bool flatview, bool dispatch_tree, bool
owner);
* @mr: #MemoryRegion to access
* @addr: address within that region
* @pval: pointer to uint64_t which the data is written to
- * @size: size of the access in bytes
+ * @op: encodes size of the access in bytes
* @attrs: memory transaction attributes to use for the access
*/
MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
hwaddr addr,
uint64_t *pval,
- unsigned size,
+ MemOp op,
MemTxAttrs attrs);
/**
* memory_region_dispatch_write: perform a write directly to the specified
@@ -1746,13 +1747,13 @@ MemTxResult memory_region_dispatch_read(MemoryRegion
*mr,
* @mr: #MemoryRegion to access
* @addr: address within that region
* @data: data to write
- * @size: size of the access in bytes
+ * @op: encodes size of the access in bytes
* @attrs: memory transaction attributes to use for the access
*/
MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
hwaddr addr,
uint64_t data,
- unsigned size,
+ MemOp op,
MemTxAttrs attrs);
/**
diff --git a/memory.c b/memory.c
index 5d8c9a9..6982e19 100644
--- a/memory.c
+++ b/memory.c
@@ -1439,10 +1439,11 @@ static MemTxResult
memory_region_dispatch_read1(MemoryRegion *mr,
MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
hwaddr addr,
uint64_t *pval,
- unsigned size,
+ MemOp op,
MemTxAttrs attrs)
{
MemTxResult r;
+ unsigned size = MEMOP_SIZE(op);
if (!memory_region_access_valid(mr, addr, size, false, attrs)) {
*pval = unassigned_mem_read(mr, addr, size);
@@ -1483,9 +1484,11 @@ static bool
memory_region_dispatch_write_eventfds(MemoryRegion *mr,
MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
hwaddr addr,
uint64_t data,
- unsigned size,
+ MemOp op,
MemTxAttrs attrs)
{
+ unsigned size = MEMOP_SIZE(op);
+
if (!memory_region_access_valid(mr, addr, size, true, attrs)) {
unassigned_mem_write(mr, addr, data, size);
return MEMTX_DECODE_ERROR;
--
1.8.3.1
