Update documents for MMU access

Author: wtdcode

include/unicorn/unicorn.h

@@ -418,7 +418,10 @@ typedef enum uc_hook_type {
     (UC_HOOK_MEM_READ + UC_HOOK_MEM_WRITE + UC_HOOK_MEM_FETCH)
 
 /*
-  Callback function for hooking memory (READ, WRITE & FETCH)
+  Callback function for hooking memory (READ, WRITE & FETCH).
+
+  NOTE: The access might be splitted depending on the MMU implementation.
+  UC_TLB_VIRTUAL provides more fine-grained control about memory accessing.
 
   @type: this memory is being READ, or WRITE
   @address: address where memory is being written or read to
@@ -434,6 +437,9 @@ typedef void (*uc_cb_hookmem_t)(uc_engine *uc, uc_mem_type type,
   Callback function for handling invalid memory access events (UNMAPPED and
     PROT events)
 
+  NOTE: The access might be splitted depending on the MMU implementation.
+  UC_TLB_VIRTUAL provides more fine-grained control about memory accessing.
+
   @type: this memory is being READ, or WRITE
   @address: address where memory is being written or read to
   @size: size of data being read or written