1 /*
2 * UAE - The Un*x Amiga Emulator
3 *
4 * memory management
5 *
6 * Copyright 1995 Bernd Schmidt
7 */
8
9 /* Enabling this adds one additional native memory reference per 68k memory
10 * access, but saves one shift (on the x86). Enabling this is probably
11 * better for the cache. My favourite benchmark (PP2) doesn't show a
12 * difference, so I leave this enabled. */
13
14 #if 1 || defined SAVE_MEMORY
15 #define SAVE_MEMORY_BANKS
16 #endif
17
18 #ifndef REGPARAM
19 #define REGPARAM
20 #endif
21
22 typedef uae_u32 (*mem_get_func)(uaecptr) REGPARAM;
23 typedef void (*mem_put_func)(uaecptr, uae_u32) REGPARAM;
24 typedef uae_u8 *(*xlate_func)(uaecptr) REGPARAM;
25 typedef int (*check_func)(uaecptr, uae_u32) REGPARAM;
26
27 extern char *address_space, *good_address_map;
28 extern uae_u8 *chipmemory;
29
30 extern uae_u32 allocated_chipmem;
31 extern uae_u32 allocated_fastmem;
32 extern uae_u32 allocated_bogomem;
33 extern uae_u32 allocated_gfxmem;
34 extern uae_u32 allocated_z3fastmem;
35 extern uae_u32 allocated_a3000mem;
36
37 #undef DIRECT_MEMFUNCS_SUCCESSFUL
38 #include "machdep/maccess.h"
39
40 #ifndef CAN_MAP_MEMORY
41 #undef USE_COMPILER
42 #endif
43
44 #if defined(USE_COMPILER) && !defined(USE_MAPPED_MEMORY)
45 #define USE_MAPPED_MEMORY
46 #endif
47
48 #define kickmem_size 0x080000
49
50 #define chipmem_start 0x00000000
51 #define bogomem_start 0x00C00000
52 #define a3000mem_start 0x07000000
53 #define kickmem_start 0x00F80000
54
55 extern int ersatzkickfile;
56
57 typedef struct {
58 /* These ones should be self-explanatory... */
59 mem_get_func lget, wget, bget;
60 mem_put_func lput, wput, bput;
61 /* Use xlateaddr to translate an Amiga address to a uae_u8 * that can
62 * be used to address memory without calling the wget/wput functions.
63 * This doesn't work for all memory banks, so this function may call
64 * abort(). */
65 xlate_func xlateaddr;
66 /* To prevent calls to abort(), use check before calling xlateaddr.
67 * It checks not only that the memory bank can do xlateaddr, but also
68 * that the pointer points to an area of at least the specified size.
69 * This is used for example to translate bitplane pointers in custom.c */
70 check_func check;
71 } addrbank;
72
73 extern uae_u8 filesysory[65536];
74
75 extern addrbank chipmem_bank;
76 extern addrbank kickmem_bank;
77 extern addrbank custom_bank;
78 extern addrbank clock_bank;
79 extern addrbank cia_bank;
80 extern addrbank rtarea_bank;
81 extern addrbank expamem_bank;
82 extern addrbank fastmem_bank;
83 extern addrbank gfxmem_bank;
84
85 extern void rtarea_init (void);
86 extern void rtarea_setup (void);
87 extern void expamem_init (void);
88 extern void expamem_reset (void);
89
90 extern uae_u32 gfxmem_start;
91 extern uae_u8 *gfxmemory;
92 extern uae_u32 gfxmem_mask;
93 extern int address_space_24;
94
95 /* Default memory access functions */
96
97 extern int default_check(uaecptr addr, uae_u32 size) REGPARAM;
98 extern uae_u8 *default_xlate(uaecptr addr) REGPARAM;
99
100 #define bankindex(addr) (((uaecptr)(addr)) >> 16)
101
102 #ifdef SAVE_MEMORY_BANKS
103 extern addrbank *mem_banks[65536];
104 #define get_mem_bank(addr) (*mem_banks[bankindex(addr)])
105 #define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = (b))
106 #else
107 extern addrbank mem_banks[65536];
108 #define get_mem_bank(addr) (mem_banks[bankindex(addr)])
109 #define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = *(b))
110 #endif
111
112 extern void memory_init(void);
113 extern void map_banks(addrbank *bank, int first, int count);
114
115 #ifndef NO_INLINE_MEMORY_ACCESS
116
117 #define longget(addr) (call_mem_get_func(get_mem_bank(addr).lget, addr))
118 #define wordget(addr) (call_mem_get_func(get_mem_bank(addr).wget, addr))
119 #define byteget(addr) (call_mem_get_func(get_mem_bank(addr).bget, addr))
120 #define longput(addr,l) (call_mem_put_func(get_mem_bank(addr).lput, addr, l))
121 #define wordput(addr,w) (call_mem_put_func(get_mem_bank(addr).wput, addr, w))
122 #define byteput(addr,b) (call_mem_put_func(get_mem_bank(addr).bput, addr, b))
123
124 #else
125
126 extern uae_u32 alongget(uaecptr addr);
127 extern uae_u32 awordget(uaecptr addr);
128 extern uae_u32 longget(uaecptr addr);
129 extern uae_u32 wordget(uaecptr addr);
130 extern uae_u32 byteget(uaecptr addr);
131 extern void longput(uaecptr addr, uae_u32 l);
132 extern void wordput(uaecptr addr, uae_u32 w);
133 extern void byteput(uaecptr addr, uae_u32 b);
134
135 #endif
136
137 #ifndef MD_HAVE_MEM_1_FUNCS
138
139 #define longget_1 longget
140 #define wordget_1 wordget
141 #define byteget_1 byteget
142 #define longput_1 longput
143 #define wordput_1 wordput
144 #define byteput_1 byteput
145
146 #endif
147
get_long(uaecptr addr)148 static inline uae_u32 get_long(uaecptr addr)
149 {
150 return longget_1(addr);
151 }
get_word(uaecptr addr)152 static inline uae_u32 get_word(uaecptr addr)
153 {
154 return wordget_1(addr);
155 }
get_byte(uaecptr addr)156 static inline uae_u32 get_byte(uaecptr addr)
157 {
158 return byteget_1(addr);
159 }
put_long(uaecptr addr,uae_u32 l)160 static inline void put_long(uaecptr addr, uae_u32 l)
161 {
162 longput_1(addr, l);
163 }
put_word(uaecptr addr,uae_u32 w)164 static inline void put_word(uaecptr addr, uae_u32 w)
165 {
166 wordput_1(addr, w);
167 }
put_byte(uaecptr addr,uae_u32 b)168 static inline void put_byte(uaecptr addr, uae_u32 b)
169 {
170 byteput_1(addr, b);
171 }
172
get_real_address(uaecptr addr)173 static inline uae_u8 *get_real_address(uaecptr addr)
174 {
175 return get_mem_bank(addr).xlateaddr(addr);
176 }
177
valid_address(uaecptr addr,uae_u32 size)178 static inline int valid_address(uaecptr addr, uae_u32 size)
179 {
180 return get_mem_bank(addr).check(addr, size);
181 }
182