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lxdream.org :: lxdream/src/mem.h
lxdream 0.9.1
released Jun 29
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filename src/mem.h
changeset 929:fd8cb0c82f5f
prev912:c5606ea44232
next931:430048ea8b71
author nkeynes
date Sat Dec 20 03:01:40 2008 +0000 (12 years ago)
branchlxdream-mem
permissions -rw-r--r--
last change First pass experiment using cached decoding.
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     1 /**
     2  * $Id$
     3  *
     4  * mem is responsible for creating and maintaining the overall system memory
     5  * map, as visible from the SH4 processor. (Note the ARM has a different map)
     6  *
     7  * Copyright (c) 2005 Nathan Keynes.
     8  *
     9  * This program is free software; you can redistribute it and/or modify
    10  * it under the terms of the GNU General Public License as published by
    11  * the Free Software Foundation; either version 2 of the License, or
    12  * (at your option) any later version.
    13  *
    14  * This program is distributed in the hope that it will be useful,
    15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    17  * GNU General Public License for more details.
    18  */
    20 #ifndef lxdream_mem_H
    21 #define lxdream_mem_H 1
    23 #include <stdint.h>
    24 #include "lxdream.h"
    26 #ifdef __cplusplus
    27 extern "C" {
    28 #endif
    30 typedef struct mem_region_fn {
    31     FASTCALL int32_t (*read_long)(sh4addr_t addr);
    32     FASTCALL void (*write_long)(sh4addr_t addr, uint32_t val);
    33     FASTCALL int32_t (*read_word)(sh4addr_t addr);
    34     FASTCALL void (*write_word)(sh4addr_t addr, uint32_t val);
    35     FASTCALL int32_t (*read_byte)(sh4addr_t addr);
    36     FASTCALL void (*write_byte)(sh4addr_t addr, uint32_t val);
    37     FASTCALL void (*read_burst)(unsigned char *dest, sh4addr_t addr);
    38     FASTCALL void (*write_burst)(sh4addr_t addr, unsigned char *src);
    39 } *mem_region_fn_t;
    41 typedef struct mem_region {
    42     uint32_t base;
    43     uint32_t size;
    44     const char *name;
    45     sh4ptr_t mem;
    46     uint32_t flags;
    47     mem_region_fn_t fn;
    48 } *mem_region_t;
    50 #define MAX_IO_REGIONS 24
    51 #define MAX_MEM_REGIONS 8
    53 #define MEM_REGION_BIOS "Bios ROM"
    54 #define MEM_REGION_MAIN "System RAM"
    55 #define MEM_REGION_VIDEO "Video RAM"
    56 #define MEM_REGION_AUDIO "Audio RAM"
    57 #define MEM_REGION_AUDIO_SCRATCH "Audio Scratch RAM"
    58 #define MEM_REGION_FLASH "System Flash"
    60 void *mem_create_ram_region( uint32_t base, uint32_t size, const char *name, mem_region_fn_t fn );
    61 void *mem_create_repeating_ram_region( uint32_t base, uint32_t size, const char *name, mem_region_fn_t fn,
    62 				       uint32_t repeat_offset, uint32_t last_repeat );
    63 /**
    64  * Load a ROM image from the specified filename. If the memory region has not
    65  * been allocated, it is created now, otherwise the existing region is reused.
    66  * If the CRC check fails, a warning will be printed.
    67  * @return TRUE if the image was loaded successfully (irrespective of CRC failure).
    68  */
    69 gboolean mem_load_rom( const gchar *filename, uint32_t base, uint32_t size, 
    70 		       uint32_t crc, const gchar *region_name, mem_region_fn_t fn );
    71 void *mem_alloc_pages( int n );
    72 sh4ptr_t mem_get_region( uint32_t addr );
    73 sh4ptr_t mem_get_region_by_name( const char *name );
    74 int mem_has_page( uint32_t addr );
    75 sh4ptr_t mem_get_page( uint32_t addr );
    76 int mem_load_block( const gchar *filename, uint32_t base, uint32_t size );
    77 int mem_save_block( const gchar *filename, uint32_t base, uint32_t size );
    78 void mem_set_trace( const gchar *tracelist, int flag );
    79 void mem_init( void );
    80 void mem_reset( void );
    81 void mem_copy_from_sh4( sh4ptr_t dest, sh4addr_t src, size_t count );
    82 void mem_copy_to_sh4( sh4addr_t dest, sh4ptr_t src, size_t count );
    84 /**
    85  * Write a long value directly to SH4-addressable memory.
    86  * @param dest a valid, writable physical memory address, relative to the SH4
    87  * @param value the value to write.
    88  */
    89 void mem_write_long( sh4addr_t dest, uint32_t value );
    91 #define ENABLE_DEBUG_MODE 1
    93 typedef enum { BREAK_NONE=0, BREAK_ONESHOT=1, BREAK_KEEP=2 } breakpoint_type_t;
    95 struct breakpoint_struct {
    96     uint32_t address;
    97     breakpoint_type_t type;
    98 };
   100 #define MAX_BREAKPOINTS 32
   103 #define MEM_FLAG_ROM 4 /* Mem region is ROM-based */
   104 #define MEM_FLAG_RAM 6 
   106 #define WATCH_WRITE 1
   107 #define WATCH_READ  2
   108 #define WATCH_EXEC  3  /* AKA Breakpoint :) */
   110 typedef struct watch_point *watch_point_t;
   112 watch_point_t mem_new_watch( uint32_t start, uint32_t end, int flags );
   113 void mem_delete_watch( watch_point_t watch );
   114 watch_point_t mem_is_watched( uint32_t addr, int size, int op );
   116 extern sh4ptr_t *page_map;
   118 #ifdef __cplusplus
   119 }
   120 #endif
   122 #endif /* !lxdream_mem_H */
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