src/uae_cpu/memory.h

 /*
  * UAE - The Un*x Amiga Emulator
  *
  * memory management
  *
  * Copyright 1995 Bernd Schmidt
  */

#ifndef UAE_MEMORY_H
#define UAE_MEMORY_H

#if !DIRECT_ADDRESSING && !REAL_ADDRESSING

/* Enabling this adds one additional native memory reference per 68k memory
 * access, but saves one shift (on the x86). Enabling this is probably
 * better for the cache. My favourite benchmark (PP2) doesn't show a
 * difference, so I leave this enabled. */

#if 1 || defined SAVE_MEMORY
#define SAVE_MEMORY_BANKS
#endif

typedef uae_u32 (REGPARAM2 *mem_get_func)(uaecptr) REGPARAM;
typedef void (REGPARAM2 *mem_put_func)(uaecptr, uae_u32) REGPARAM;
typedef uae_u8 *(REGPARAM2 *xlate_func)(uaecptr) REGPARAM;
typedef int (REGPARAM2 *check_func)(uaecptr, uae_u32) REGPARAM;

#undef DIRECT_MEMFUNCS_SUCCESSFUL

#ifndef CAN_MAP_MEMORY
#undef USE_COMPILER
#endif

#if defined(USE_COMPILER) && !defined(USE_MAPPED_MEMORY)
#define USE_MAPPED_MEMORY
#endif

typedef struct {
    /* These ones should be self-explanatory... */
    mem_get_func lget, wget, bget;
    mem_put_func lput, wput, bput;
    /* Use xlateaddr to translate an Amiga address to a uae_u8 * that can
     * be used to address memory without calling the wget/wput functions.
     * This doesn't work for all memory banks, so this function may call
     * abort(). */
    xlate_func xlateaddr;
    /* To prevent calls to abort(), use check before calling xlateaddr.
     * It checks not only that the memory bank can do xlateaddr, but also
     * that the pointer points to an area of at least the specified size.
     * This is used for example to translate bitplane pointers in custom.c */
    check_func check;
} addrbank;

extern uae_u8 filesysory[65536];

extern addrbank ram_bank;       // Mac RAM
extern addrbank rom_bank;       // Mac ROM
extern addrbank frame_bank;     // Frame buffer

/* Default memory access functions */

extern int REGPARAM2 default_check(uaecptr addr, uae_u32 size) REGPARAM;
extern uae_u8 *REGPARAM2 default_xlate(uaecptr addr) REGPARAM;

#define bankindex(addr) (((uaecptr)(addr)) >> 16)

#ifdef SAVE_MEMORY_BANKS
extern addrbank *mem_banks[65536];
#define get_mem_bank(addr) (*mem_banks[bankindex(addr)])
#define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = (b))
#else
extern addrbank mem_banks[65536];
#define get_mem_bank(addr) (mem_banks[bankindex(addr)])
#define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = *(b))
#endif

extern void memory_init(void);
extern void map_banks(addrbank *bank, int first, int count);

#ifndef NO_INLINE_MEMORY_ACCESS

#define longget(addr) (call_mem_get_func(get_mem_bank(addr).lget, addr))
#define wordget(addr) (call_mem_get_func(get_mem_bank(addr).wget, addr))
#define byteget(addr) (call_mem_get_func(get_mem_bank(addr).bget, addr))
#define longput(addr,l) (call_mem_put_func(get_mem_bank(addr).lput, addr, l))
#define wordput(addr,w) (call_mem_put_func(get_mem_bank(addr).wput, addr, w))
#define byteput(addr,b) (call_mem_put_func(get_mem_bank(addr).bput, addr, b))

#else

extern uae_u32 alongget(uaecptr addr);
extern uae_u32 awordget(uaecptr addr);
extern uae_u32 longget(uaecptr addr);
extern uae_u32 wordget(uaecptr addr);
extern uae_u32 byteget(uaecptr addr);
extern void longput(uaecptr addr, uae_u32 l);
extern void wordput(uaecptr addr, uae_u32 w);
extern void byteput(uaecptr addr, uae_u32 b);

#endif

#ifndef MD_HAVE_MEM_1_FUNCS

#define longget_1 longget
#define wordget_1 wordget
#define byteget_1 byteget
#define longput_1 longput
#define wordput_1 wordput
#define byteput_1 byteput

#endif

#endif /* !DIRECT_ADDRESSING && !REAL_ADDRESSING */

#if REAL_ADDRESSING
const uintptr MEMBaseDiff = 0;
#define do_get_real_address(a)          ((uae_u8 *)(a))
#define do_get_virtual_address(a)       ((uae_u32)(a))
#endif /* REAL_ADDRESSING */

#if DIRECT_ADDRESSING
extern uintptr MEMBaseDiff;
#define do_get_real_address(a)          ((uae_u8 *)(a) + MEMBaseDiff)
#define do_get_virtual_address(a)       ((uae_u32)(a) - MEMBaseDiff)
#endif /* DIRECT_ADDRESSING */

#if REAL_ADDRESSING || DIRECT_ADDRESSING
static __inline__ uae_u32 get_long(uaecptr addr)
{
    uae_u32 * const m = (uae_u32 *)do_get_real_address(addr);
    return do_get_mem_long(m);
}
static __inline__ uae_u32 get_word(uaecptr addr)
{
    uae_u16 * const m = (uae_u16 *)do_get_real_address(addr);
    return do_get_mem_word(m);
}
static __inline__ uae_u32 get_byte(uaecptr addr)
{
    uae_u8 * const m = (uae_u8 *)do_get_real_address(addr);
    return do_get_mem_byte(m);
}
static __inline__ void put_long(uaecptr addr, uae_u32 l)
{
    uae_u32 * const m = (uae_u32 *)do_get_real_address(addr);
    do_put_mem_long(m, l);
}
static __inline__ void put_word(uaecptr addr, uae_u32 w)
{
    uae_u16 * const m = (uae_u16 *)do_get_real_address(addr);
    do_put_mem_word(m, w);
}
static __inline__ void put_byte(uaecptr addr, uae_u32 b)
{
    uae_u8 * const m = (uae_u8 *)do_get_real_address(addr);
    do_put_mem_byte(m, b);
}
static __inline__ uae_u8 *get_real_address(uaecptr addr)
{
        return do_get_real_address(addr);
}
static __inline__ uae_u32 get_virtual_address(uae_u8 *addr)
{
        return do_get_virtual_address(addr);
}
static __inline__ int valid_address(uaecptr addr, uae_u32 size)
{
    return 1;
}
#else
static __inline__ uae_u32 get_long(uaecptr addr)
{
    return longget_1(addr);
}
static __inline__ uae_u32 get_word(uaecptr addr)
{
    return wordget_1(addr);
}
static __inline__ uae_u32 get_byte(uaecptr addr)
{
    return byteget_1(addr);
}
static __inline__ void put_long(uaecptr addr, uae_u32 l)
{
    longput_1(addr, l);
}
static __inline__ void put_word(uaecptr addr, uae_u32 w)
{
    wordput_1(addr, w);
}
static __inline__ void put_byte(uaecptr addr, uae_u32 b)
{
    byteput_1(addr, b);
}
static __inline__ uae_u8 *get_real_address(uaecptr addr)
{
    return get_mem_bank(addr).xlateaddr(addr);
}
/* gb-- deliberately not implemented since it shall not be used... */
extern uae_u32 get_virtual_address(uae_u8 *addr);
static __inline__ int valid_address(uaecptr addr, uae_u32 size)
{
    return get_mem_bank(addr).check(addr, size);
}
#endif /* DIRECT_ADDRESSING || REAL_ADDRESSING */

#endif /* MEMORY_H */

Revision:	1.3
Committed:	2001-06-26T22:35:42Z (23 years, 4 months ago) by gbeauche
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+1 -2 lines
Log Message:	- added SIGSEGV support for Linux/Alpha (to be checked), Darwin/PPC - added uniform virtual memory allocation (supports mmap(), vm_allocate(), or fallbacks to malloc()/free()) - cleaned up memory allocation in main_unix.cpp
#	User	Rev	Content
1	cebix	1.1	/*
2			* UAE - The Un*x Amiga Emulator
3			*
4			* memory management
5			*
6			* Copyright 1995 Bernd Schmidt
7			*/
8
9			#ifndef UAE_MEMORY_H
10			#define UAE_MEMORY_H
11
12	gbeauche	1.2	#if !DIRECT_ADDRESSING && !REAL_ADDRESSING
13
14	cebix	1.1	/* Enabling this adds one additional native memory reference per 68k memory
15			* access, but saves one shift (on the x86). Enabling this is probably
16			* better for the cache. My favourite benchmark (PP2) doesn't show a
17			* difference, so I leave this enabled. */
18
19			#if 1 \|\| defined SAVE_MEMORY
20			#define SAVE_MEMORY_BANKS
21			#endif
22
23			typedef uae_u32 (REGPARAM2 *mem_get_func)(uaecptr) REGPARAM;
24			typedef void (REGPARAM2 *mem_put_func)(uaecptr, uae_u32) REGPARAM;
25			typedef uae_u8 (REGPARAM2 xlate_func)(uaecptr) REGPARAM;
26			typedef int (REGPARAM2 *check_func)(uaecptr, uae_u32) REGPARAM;
27
28			#undef DIRECT_MEMFUNCS_SUCCESSFUL
29
30			#ifndef CAN_MAP_MEMORY
31			#undef USE_COMPILER
32			#endif
33
34			#if defined(USE_COMPILER) && !defined(USE_MAPPED_MEMORY)
35			#define USE_MAPPED_MEMORY
36			#endif
37
38			typedef struct {
39			/* These ones should be self-explanatory... */
40			mem_get_func lget, wget, bget;
41			mem_put_func lput, wput, bput;
42			/* Use xlateaddr to translate an Amiga address to a uae_u8 * that can
43			* be used to address memory without calling the wget/wput functions.
44			* This doesn't work for all memory banks, so this function may call
45			* abort(). */
46			xlate_func xlateaddr;
47			/* To prevent calls to abort(), use check before calling xlateaddr.
48			* It checks not only that the memory bank can do xlateaddr, but also
49			* that the pointer points to an area of at least the specified size.
50			* This is used for example to translate bitplane pointers in custom.c */
51			check_func check;
52			} addrbank;
53
54			extern uae_u8 filesysory[65536];
55
56			extern addrbank ram_bank; // Mac RAM
57			extern addrbank rom_bank; // Mac ROM
58			extern addrbank frame_bank; // Frame buffer
59
60			/* Default memory access functions */
61
62			extern int REGPARAM2 default_check(uaecptr addr, uae_u32 size) REGPARAM;
63			extern uae_u8 *REGPARAM2 default_xlate(uaecptr addr) REGPARAM;
64
65			#define bankindex(addr) (((uaecptr)(addr)) >> 16)
66
67			#ifdef SAVE_MEMORY_BANKS
68			extern addrbank *mem_banks[65536];
69			#define get_mem_bank(addr) (*mem_banks[bankindex(addr)])
70			#define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = (b))
71			#else
72			extern addrbank mem_banks[65536];
73			#define get_mem_bank(addr) (mem_banks[bankindex(addr)])
74			#define put_mem_bank(addr, b) (mem_banks[bankindex(addr)] = *(b))
75			#endif
76
77			extern void memory_init(void);
78			extern void map_banks(addrbank *bank, int first, int count);
79
80			#ifndef NO_INLINE_MEMORY_ACCESS
81
82			#define longget(addr) (call_mem_get_func(get_mem_bank(addr).lget, addr))
83			#define wordget(addr) (call_mem_get_func(get_mem_bank(addr).wget, addr))
84			#define byteget(addr) (call_mem_get_func(get_mem_bank(addr).bget, addr))
85			#define longput(addr,l) (call_mem_put_func(get_mem_bank(addr).lput, addr, l))
86			#define wordput(addr,w) (call_mem_put_func(get_mem_bank(addr).wput, addr, w))
87			#define byteput(addr,b) (call_mem_put_func(get_mem_bank(addr).bput, addr, b))
88
89			#else
90
91			extern uae_u32 alongget(uaecptr addr);
92			extern uae_u32 awordget(uaecptr addr);
93			extern uae_u32 longget(uaecptr addr);
94			extern uae_u32 wordget(uaecptr addr);
95			extern uae_u32 byteget(uaecptr addr);
96			extern void longput(uaecptr addr, uae_u32 l);
97			extern void wordput(uaecptr addr, uae_u32 w);
98			extern void byteput(uaecptr addr, uae_u32 b);
99
100			#endif
101
102			#ifndef MD_HAVE_MEM_1_FUNCS
103
104			#define longget_1 longget
105			#define wordget_1 wordget
106			#define byteget_1 byteget
107			#define longput_1 longput
108			#define wordput_1 wordput
109			#define byteput_1 byteput
110
111			#endif
112
113	gbeauche	1.2	#endif /* !DIRECT_ADDRESSING && !REAL_ADDRESSING */
114
115	cebix	1.1	#if REAL_ADDRESSING
116	gbeauche	1.3	const uintptr MEMBaseDiff = 0;
117	gbeauche	1.2	#define do_get_real_address(a) ((uae_u8 *)(a))
118			#define do_get_virtual_address(a) ((uae_u32)(a))
119			#endif /* REAL_ADDRESSING */
120
121			#if DIRECT_ADDRESSING
122			extern uintptr MEMBaseDiff;
123			#define do_get_real_address(a) ((uae_u8 *)(a) + MEMBaseDiff)
124			#define do_get_virtual_address(a) ((uae_u32)(a) - MEMBaseDiff)
125			#endif /* DIRECT_ADDRESSING */
126
127			#if REAL_ADDRESSING \|\| DIRECT_ADDRESSING
128	cebix	1.1	static __inline__ uae_u32 get_long(uaecptr addr)
129			{
130	gbeauche	1.2	uae_u32 * const m = (uae_u32 *)do_get_real_address(addr);
131			return do_get_mem_long(m);
132	cebix	1.1	}
133			static __inline__ uae_u32 get_word(uaecptr addr)
134			{
135	gbeauche	1.2	uae_u16 * const m = (uae_u16 *)do_get_real_address(addr);
136			return do_get_mem_word(m);
137	cebix	1.1	}
138			static __inline__ uae_u32 get_byte(uaecptr addr)
139			{
140	gbeauche	1.2	uae_u8 * const m = (uae_u8 *)do_get_real_address(addr);
141			return do_get_mem_byte(m);
142	cebix	1.1	}
143			static __inline__ void put_long(uaecptr addr, uae_u32 l)
144			{
145	gbeauche	1.2	uae_u32 * const m = (uae_u32 *)do_get_real_address(addr);
146			do_put_mem_long(m, l);
147	cebix	1.1	}
148			static __inline__ void put_word(uaecptr addr, uae_u32 w)
149			{
150	gbeauche	1.2	uae_u16 * const m = (uae_u16 *)do_get_real_address(addr);
151			do_put_mem_word(m, w);
152	cebix	1.1	}
153			static __inline__ void put_byte(uaecptr addr, uae_u32 b)
154			{
155	gbeauche	1.2	uae_u8 * const m = (uae_u8 *)do_get_real_address(addr);
156			do_put_mem_byte(m, b);
157	cebix	1.1	}
158			static __inline__ uae_u8 *get_real_address(uaecptr addr)
159			{
160	gbeauche	1.2	return do_get_real_address(addr);
161			}
162			static __inline__ uae_u32 get_virtual_address(uae_u8 *addr)
163			{
164			return do_get_virtual_address(addr);
165	cebix	1.1	}
166			static __inline__ int valid_address(uaecptr addr, uae_u32 size)
167			{
168			return 1;
169			}
170			#else
171			static __inline__ uae_u32 get_long(uaecptr addr)
172			{
173			return longget_1(addr);
174			}
175			static __inline__ uae_u32 get_word(uaecptr addr)
176			{
177			return wordget_1(addr);
178			}
179			static __inline__ uae_u32 get_byte(uaecptr addr)
180			{
181			return byteget_1(addr);
182			}
183			static __inline__ void put_long(uaecptr addr, uae_u32 l)
184			{
185			longput_1(addr, l);
186			}
187			static __inline__ void put_word(uaecptr addr, uae_u32 w)
188			{
189			wordput_1(addr, w);
190			}
191			static __inline__ void put_byte(uaecptr addr, uae_u32 b)
192			{
193			byteput_1(addr, b);
194			}
195			static __inline__ uae_u8 *get_real_address(uaecptr addr)
196			{
197			return get_mem_bank(addr).xlateaddr(addr);
198			}
199	gbeauche	1.2	/* gb-- deliberately not implemented since it shall not be used... */
200			extern uae_u32 get_virtual_address(uae_u8 *addr);
201	cebix	1.1	static __inline__ int valid_address(uaecptr addr, uae_u32 size)
202			{
203			return get_mem_bank(addr).check(addr, size);
204			}
205	gbeauche	1.2	#endif /* DIRECT_ADDRESSING \|\| REAL_ADDRESSING */
206
207			#endif /* MEMORY_H */
208	cebix	1.1