memory: Access MemoryRegion with endianness

Preparation for collapsing the two byte swaps adjust_endianness and
handle_bswap into the former.

Call memory_region_dispatch_{read|write} with endianness encoded into
the "MemOp op" operand.

This patch does not change any behaviour as
memory_region_dispatch_{read|write} is yet to handle the endianness.

Once it does handle endianness, callers with byte swaps can collapse
them into adjust_endianness.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Tony Nguyen <tony.nguyen@bt.com>
Message-Id: <8066ab3eb037c0388dfadfe53c5118429dd1de3a.1566466906.git.tony.nguyen@bt.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 8 insertions, 7 deletions

diff --git a/hw/intc/armv7m_nvic.c b/hw/intc/armv7m_nvic.c
index 7220940133..8e93e51e81 100644
--- a/hw/intc/armv7m_nvic.c
+++ b/hw/intc/armv7m_nvic.c
@@ -2349,8 +2349,8 @@ static MemTxResult nvic_sysreg_ns_write(void *opaque, hwaddr addr,
     if (attrs.secure) {
         /* S accesses to the alias act like NS accesses to the real region */
         attrs.secure = 0;
-        return memory_region_dispatch_write(mr, addr, value, size_memop(size),
-                                            attrs);
+        return memory_region_dispatch_write(mr, addr, value,
+                                            size_memop(size) | MO_TE, attrs);
     } else {
         /* NS attrs are RAZ/WI for privileged, and BusFault for user */
         if (attrs.user) {
@@ -2369,8 +2369,8 @@ static MemTxResult nvic_sysreg_ns_read(void *opaque, hwaddr addr,
     if (attrs.secure) {
         /* S accesses to the alias act like NS accesses to the real region */
         attrs.secure = 0;
-        return memory_region_dispatch_read(mr, addr, data, size_memop(size),
-                                           attrs);
+        return memory_region_dispatch_read(mr, addr, data,
+                                           size_memop(size) | MO_TE, attrs);
     } else {
         /* NS attrs are RAZ/WI for privileged, and BusFault for user */
         if (attrs.user) {
@@ -2396,8 +2396,8 @@ static MemTxResult nvic_systick_write(void *opaque, hwaddr addr,
 
     /* Direct the access to the correct systick */
     mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->systick[attrs.secure]), 0);
-    return memory_region_dispatch_write(mr, addr, value, size_memop(size),
-                                        attrs);
+    return memory_region_dispatch_write(mr, addr, value,
+                                        size_memop(size) | MO_TE, attrs);
 }
 
 static MemTxResult nvic_systick_read(void *opaque, hwaddr addr,
@@ -2409,7 +2409,8 @@ static MemTxResult nvic_systick_read(void *opaque, hwaddr addr,
 
     /* Direct the access to the correct systick */
     mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->systick[attrs.secure]), 0);
-    return memory_region_dispatch_read(mr, addr, data, size_memop(size), attrs);
+    return memory_region_dispatch_read(mr, addr, data, size_memop(size) | MO_TE,
+                                       attrs);
 }
 
 static const MemoryRegionOps nvic_systick_ops = {