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      1 /* mem.h --- interface to memory for M32C simulator.
      2 
      3 Copyright (C) 2005-2024 Free Software Foundation, Inc.
      4 Contributed by Red Hat, Inc.
      5 
      6 This file is part of the GNU simulators.
      7 
      8 This program is free software; you can redistribute it and/or modify
      9 it under the terms of the GNU General Public License as published by
     10 the Free Software Foundation; either version 3 of the License, or
     11 (at your option) any later version.
     12 
     13 This program is distributed in the hope that it will be useful,
     14 but WITHOUT ANY WARRANTY; without even the implied warranty of
     15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16 GNU General Public License for more details.
     17 
     18 You should have received a copy of the GNU General Public License
     19 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
     20 
     21 enum mem_content_type {
     22      MC_UNINIT,
     23      MC_DATA,
     24      MC_PUSHED_PC,
     25      MC_NUM_TYPES
     26 };
     27 
     28 enum mem_ptr_action
     29 {
     30   MPA_WRITING,
     31   MPA_READING,
     32   MPA_CONTENT_TYPE,
     33   MPA_DECODE_CACHE
     34 };
     35 
     36 void init_mem (void);
     37 void mem_usage_stats (void);
     38 unsigned long mem_usage_cycles (void);
     39 
     40 #undef PAGE_SIZE	/* Cleanup system headers.  */
     41 
     42 /* rx_mem_ptr returns a pointer which is valid as long as the address
     43    requested remains within the same page.  */
     44 #define PAGE_BITS 12
     45 #define PAGE_SIZE (1 << PAGE_BITS)
     46 #define NONPAGE_MASK (~(PAGE_SIZE-1))
     47 
     48 unsigned char *rx_mem_ptr (unsigned long address, enum mem_ptr_action action);
     49 #ifdef RXC_never
     50 RX_Opcode_Decoded **rx_mem_decode_cache (unsigned long address);
     51 #endif
     52 
     53 void mem_put_qi (int address, unsigned char value);
     54 void mem_put_hi (int address, unsigned short value);
     55 void mem_put_psi (int address, unsigned long value);
     56 void mem_put_si (int address, unsigned long value);
     57 
     58 void mem_put_blk (int address, void *bufptr_void, int nbytes);
     59 
     60 unsigned char mem_get_pc (int address);
     61 
     62 unsigned char mem_get_qi (int address);
     63 unsigned short mem_get_hi (int address);
     64 unsigned long mem_get_psi (int address);
     65 unsigned long mem_get_si (int address);
     66 
     67 void mem_get_blk (int address, void *bufptr_void, int nbytes);
     68 
     69 int sign_ext (int v, int bits);
     70 
     71 void mem_set_content_type (int address, enum mem_content_type type);
     72 void mem_set_content_range (int start_address, int end_address, enum mem_content_type type);
     73 enum mem_content_type mem_get_content_type (int address);
     74