trace/mem-internal.h

   1 /*
   2  * Helper functions for guest memory tracing
   3  *
   4  * Copyright (C) 2016 Lluís Vilanova <vilanova@ac.upc.edu>
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9
  10 #ifndef TRACE__MEM_INTERNAL_H
  11 #define TRACE__MEM_INTERNAL_H
  12
  13 #define TRACE_MEM_SZ_SHIFT_MASK 0xf /* size shift mask */
  14 #define TRACE_MEM_SE (1ULL << 4)    /* sign extended (y/n) */
  15 #define TRACE_MEM_BE (1ULL << 5)    /* big endian (y/n) */
  16 #define TRACE_MEM_ST (1ULL << 6)    /* store (y/n) */
  17 #define TRACE_MEM_MMU_SHIFT 8       /* mmu idx */
  18
  19 static inline uint16_t trace_mem_build_info(
  20     int size_shift, bool sign_extend, MemOp endianness,
  21     bool store, unsigned int mmu_idx)
  22 {
  23     uint16_t res;
  24
  25     res = size_shift & TRACE_MEM_SZ_SHIFT_MASK;
  26     if (sign_extend) {
  27         res |= TRACE_MEM_SE;
  28     }
  29     if (endianness == MO_BE) {
  30         res |= TRACE_MEM_BE;
  31     }
  32     if (store) {
  33         res |= TRACE_MEM_ST;
  34     }
  35 #ifdef CONFIG_SOFTMMU
  36     res |= mmu_idx << TRACE_MEM_MMU_SHIFT;
  37 #endif
  38     return res;
  39 }
  40
  41 static inline uint16_t trace_mem_get_info(MemOp op,
  42                                           unsigned int mmu_idx,
  43                                           bool store)
  44 {
  45     return trace_mem_build_info(op & MO_SIZE, !!(op & MO_SIGN),
  46                                 op & MO_BSWAP, store,
  47                                 mmu_idx);
  48 }
  49
  50 #endif /* TRACE__MEM_INTERNAL_H */