diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c
index a8b3f7f978..6c18e5e578 100644
--- a/hw/block/pflash_cfi02.c
+++ b/hw/block/pflash_cfi02.c
@@ -493,102 +493,41 @@ static void pflash_write (pflash_t *pfl, hwaddr offset,
     pfl->cmd = 0;
 }
 
-
-static uint32_t pflash_readb_be(void *opaque, hwaddr addr)
+static uint64_t pflash_be_readfn(void *opaque, hwaddr addr, unsigned size)
 {
-    return pflash_read(opaque, addr, 1, 1);
+    return pflash_read(opaque, addr, size, 1);
 }
 
-static uint32_t pflash_readb_le(void *opaque, hwaddr addr)
+static void pflash_be_writefn(void *opaque, hwaddr addr,
+                              uint64_t value, unsigned size)
 {
-    return pflash_read(opaque, addr, 1, 0);
+    pflash_write(opaque, addr, value, size, 1);
 }
 
-static uint32_t pflash_readw_be(void *opaque, hwaddr addr)
+static uint64_t pflash_le_readfn(void *opaque, hwaddr addr, unsigned size)
 {
-    pflash_t *pfl = opaque;
-
-    return pflash_read(pfl, addr, 2, 1);
+    return pflash_read(opaque, addr, size, 0);
 }
 
-static uint32_t pflash_readw_le(void *opaque, hwaddr addr)
+static void pflash_le_writefn(void *opaque, hwaddr addr,
+                              uint64_t value, unsigned size)
 {
-    pflash_t *pfl = opaque;
-
-    return pflash_read(pfl, addr, 2, 0);
-}
-
-static uint32_t pflash_readl_be(void *opaque, hwaddr addr)
-{
-    pflash_t *pfl = opaque;
-
-    return pflash_read(pfl, addr, 4, 1);
-}
-
-static uint32_t pflash_readl_le(void *opaque, hwaddr addr)
-{
-    pflash_t *pfl = opaque;
-
-    return pflash_read(pfl, addr, 4, 0);
-}
-
-static void pflash_writeb_be(void *opaque, hwaddr addr,
-                             uint32_t value)
-{
-    pflash_write(opaque, addr, value, 1, 1);
-}
-
-static void pflash_writeb_le(void *opaque, hwaddr addr,
-                             uint32_t value)
-{
-    pflash_write(opaque, addr, value, 1, 0);
-}
-
-static void pflash_writew_be(void *opaque, hwaddr addr,
-                             uint32_t value)
-{
-    pflash_t *pfl = opaque;
-
-    pflash_write(pfl, addr, value, 2, 1);
-}
-
-static void pflash_writew_le(void *opaque, hwaddr addr,
-                             uint32_t value)
-{
-    pflash_t *pfl = opaque;
-
-    pflash_write(pfl, addr, value, 2, 0);
-}
-
-static void pflash_writel_be(void *opaque, hwaddr addr,
-                             uint32_t value)
-{
-    pflash_t *pfl = opaque;
-
-    pflash_write(pfl, addr, value, 4, 1);
-}
-
-static void pflash_writel_le(void *opaque, hwaddr addr,
-                             uint32_t value)
-{
-    pflash_t *pfl = opaque;
-
-    pflash_write(pfl, addr, value, 4, 0);
+    pflash_write(opaque, addr, value, size, 0);
 }
 
 static const MemoryRegionOps pflash_cfi02_ops_be = {
-    .old_mmio = {
-        .read = { pflash_readb_be, pflash_readw_be, pflash_readl_be, },
-        .write = { pflash_writeb_be, pflash_writew_be, pflash_writel_be, },
-    },
+    .read = pflash_be_readfn,
+    .write = pflash_be_writefn,
+    .valid.min_access_size = 1,
+    .valid.max_access_size = 4,
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
 static const MemoryRegionOps pflash_cfi02_ops_le = {
-    .old_mmio = {
-        .read = { pflash_readb_le, pflash_readw_le, pflash_readl_le, },
-        .write = { pflash_writeb_le, pflash_writew_le, pflash_writel_le, },
-    },
+    .read = pflash_le_readfn,
+    .write = pflash_le_writefn,
+    .valid.min_access_size = 1,
+    .valid.max_access_size = 4,
     .endianness = DEVICE_NATIVE_ENDIAN,
 };