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root/cebix/BasiliskII/src/Unix/sysdeps.h
Revision: 1.4
Committed: 1999-10-18T11:44:20Z (25 years ago) by cebix
Content type: text/plain
Branch: MAIN
Changes since 1.3: +1 -1 lines
Log Message:
- 680x0 added to list of CPU that can handle unaligned accesses

File Contents

# User Rev Content
1 cebix 1.1 /*
2     * sysdeps.h - System dependent definitions for Unix
3     *
4     * Basilisk II (C) 1997-1999 Christian Bauer
5     *
6     * This program is free software; you can redistribute it and/or modify
7     * it under the terms of the GNU General Public License as published by
8     * the Free Software Foundation; either version 2 of the License, or
9     * (at your option) any later version.
10     *
11     * This program is distributed in the hope that it will be useful,
12     * but WITHOUT ANY WARRANTY; without even the implied warranty of
13     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14     * GNU General Public License for more details.
15     *
16     * You should have received a copy of the GNU General Public License
17     * along with this program; if not, write to the Free Software
18     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19     */
20    
21     #ifndef SYSDEPS_H
22     #define SYSDEPS_H
23    
24     #ifndef __STDC__
25     #error "Your compiler is not ANSI. Get a real one."
26     #endif
27    
28     #include "config.h"
29 cebix 1.3 #include "user_strings_unix.h"
30 cebix 1.1
31     #ifndef STDC_HEADERS
32     #error "You don't have ANSI C header files."
33     #endif
34    
35 cebix 1.2 #ifdef HAVE_UNISTD_H
36     # include <sys/types.h>
37     # include <unistd.h>
38     #endif
39    
40 cebix 1.1 #include <netinet/in.h>
41     #include <assert.h>
42     #include <stdio.h>
43     #include <stdlib.h>
44     #include <string.h>
45     #include <pthread.h>
46    
47     #ifdef HAVE_FCNTL_H
48     # include <fcntl.h>
49     #endif
50    
51     #ifdef TIME_WITH_SYS_TIME
52     # include <sys/time.h>
53     # include <time.h>
54     #else
55     # ifdef HAVE_SYS_TIME_H
56     # include <sys/time.h>
57     # else
58     # include <time.h>
59     # endif
60     #endif
61    
62    
63     /* Are the Mac and the host address space the same? */
64     #define REAL_ADDRESSING 0
65    
66     /* Are we using a 68k emulator or the real thing? */
67     #define EMULATED_68K 1
68    
69     /* Is the Mac ROM write protected? */
70     #define ROM_IS_WRITE_PROTECTED 1
71    
72     /* Data types */
73     typedef unsigned char uint8;
74     typedef signed char int8;
75     #if SIZEOF_SHORT == 2
76     typedef unsigned short uint16;
77     typedef short int16;
78     #elif SIZEOF_INT == 2
79     typedef unsigned int uint16;
80     typedef int int16;
81     #else
82     #error "No 2 byte type, you lose."
83     #endif
84     #if SIZEOF_INT == 4
85     typedef unsigned int uint32;
86     typedef int int32;
87     #elif SIZEOF_LONG == 4
88     typedef unsigned long uint32;
89     typedef long int32;
90     #else
91     #error "No 4 byte type, you lose."
92     #endif
93     #if SIZEOF_LONG == 8
94     typedef unsigned long uint64;
95     typedef long int64;
96     #elif SIZEOF_LONG_LONG == 8
97     typedef unsigned long long uint64;
98     typedef long long int64;
99     #else
100     #error "No 8 byte type, you lose."
101     #endif
102    
103     /* Time data type for Time Manager emulation */
104     #ifdef HAVE_CLOCK_GETTIME
105     typedef struct timespec tm_time_t;
106     #else
107     typedef struct timeval tm_time_t;
108     #endif
109    
110     /* UAE CPU data types */
111     #define uae_s8 int8
112     #define uae_u8 uint8
113     #define uae_s16 int16
114     #define uae_u16 uint16
115     #define uae_s32 int32
116     #define uae_u32 uint32
117     typedef uae_u32 uaecptr;
118    
119     /* Alignment restrictions */
120 cebix 1.4 #if defined(__i386__) || defined(__powerpc__) || defined(__m68k__)
121 cebix 1.1 # define CPU_CAN_ACCESS_UNALIGNED
122     #endif
123    
124     /* UAE CPU defines */
125     #ifdef WORDS_BIGENDIAN
126    
127     #ifdef CPU_CAN_ACCESS_UNALIGNED
128    
129     /* Big-endian CPUs which can do unaligned accesses */
130     static inline uae_u32 do_get_mem_long(uae_u32 *a) {return *a;}
131     static inline uae_u32 do_get_mem_word(uae_u16 *a) {return *a;}
132     static inline void do_put_mem_long(uae_u32 *a, uae_u32 v) {*a = v;}
133     static inline void do_put_mem_word(uae_u16 *a, uae_u32 v) {*a = v;}
134    
135     #else /* CPU_CAN_ACCESS_UNALIGNED */
136    
137     #ifdef sgi
138     /* The SGI MIPSPro compilers can do unaligned accesses given enough hints.
139     * They will automatically inline these routines. */
140     #ifdef __cplusplus
141     extern "C" { /* only the C compiler does unaligned accesses */
142     #endif
143     extern uae_u32 do_get_mem_long(uae_u32 *a);
144     extern uae_u32 do_get_mem_word(uae_u16 *a);
145     extern void do_put_mem_long(uae_u32 *a, uae_u32 v);
146     extern void do_put_mem_word(uae_u16 *a, uae_u32 v);
147     #ifdef __cplusplus
148     }
149     #endif
150    
151     #else /* sgi */
152    
153     /* Big-endian CPUs which can not do unaligned accesses (this is not the most efficient way to do this...) */
154     static inline uae_u32 do_get_mem_long(uae_u32 *a) {uint8 *b = (uint8 *)a; return (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3];}
155     static inline uae_u32 do_get_mem_word(uae_u16 *a) {uint8 *b = (uint8 *)a; return (b[0] << 8) | b[1];}
156     static inline void do_put_mem_long(uae_u32 *a, uae_u32 v) {uint8 *b = (uint8 *)a; b[0] = v >> 24; b[1] = v >> 16; b[2] = v >> 8; b[3] = v;}
157     static inline void do_put_mem_word(uae_u16 *a, uae_u32 v) {uint8 *b = (uint8 *)a; b[0] = v >> 8; b[1] = v;}
158     #endif /* sgi */
159    
160     #endif /* CPU_CAN_ACCESS_UNALIGNED */
161    
162     #else /* WORDS_BIGENDIAN */
163    
164     #ifdef __i386__
165    
166     /* Intel x86 */
167     #define X86_PPRO_OPT
168     static inline uae_u32 do_get_mem_long(uae_u32 *a) {uint32 retval; __asm__ ("bswap %0" : "=r" (retval) : "0" (*a) : "cc"); return retval;}
169     #ifdef X86_PPRO_OPT
170     static inline uae_u32 do_get_mem_word(uae_u16 *a) {uint32 retval; __asm__ ("movzwl %w1,%k0\n\tshll $16,%k0\n\tbswapl %k0\n" : "=&r" (retval) : "m" (*a) : "cc"); return retval;}
171     #else
172     static inline uae_u32 do_get_mem_word(uae_u16 *a) {uint32 retval; __asm__ ("xorl %k0,%k0\n\tmovw %w1,%w0\n\trolw $8,%w0" : "=&r" (retval) : "m" (*a) : "cc"); return retval;}
173     #endif
174     #define HAVE_GET_WORD_UNSWAPPED
175     #define do_get_mem_word_unswapped(a) ((uae_u32)*((uae_u16 *)(a)))
176     static inline void do_put_mem_long(uae_u32 *a, uae_u32 v) {__asm__ ("bswap %0" : "=r" (v) : "0" (v) : "cc"); *a = v;}
177     #ifdef X86_PPRO_OPT
178     static inline void do_put_mem_word(uae_u16 *a, uae_u32 v) {__asm__ ("bswapl %0" : "=&r" (v) : "0" (v << 16) : "cc"); *a = v;}
179     #else
180     static inline void do_put_mem_word(uae_u16 *a, uae_u32 v) {__asm__ ("rolw $8,%0" : "=r" (v) : "0" (v) : "cc"); *a = v;}
181     #endif
182    
183     #elif defined(CPU_CAN_ACCESS_UNALIGNED)
184    
185     /* Other little-endian CPUs which can do unaligned accesses */
186     static inline uae_u32 do_get_mem_long(uae_u32 *a) {uint32 x = *a; return (x >> 24) | (x >> 8) & 0xff00 | (x << 8) & 0xff0000 | (x << 24);}
187     static inline uae_u32 do_get_mem_word(uae_u16 *a) {uint16 x = *a; return (x >> 8) | (x << 8);}
188     static inline void do_put_mem_long(uae_u32 *a, uae_u32 v) {*a = (v >> 24) | (v >> 8) & 0xff00 | (v << 8) & 0xff0000 | (v << 24);}
189     static inline void do_put_mem_word(uae_u16 *a, uae_u32 v) {*a = (v >> 8) | (v << 8);}
190    
191     #else /* CPU_CAN_ACCESS_UNALIGNED */
192    
193     /* Other little-endian CPUs which can not do unaligned accesses (this needs optimization) */
194     static inline uae_u32 do_get_mem_long(uae_u32 *a) {uint8 *b = (uint8 *)a; return (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3];}
195     static inline uae_u32 do_get_mem_word(uae_u16 *a) {uint8 *b = (uint8 *)a; return (b[0] << 8) | b[1];}
196     static inline void do_put_mem_long(uae_u32 *a, uae_u32 v) {uint8 *b = (uint8 *)a; b[0] = v >> 24; b[1] = v >> 16; b[2] = v >> 8; b[3] = v;}
197     static inline void do_put_mem_word(uae_u16 *a, uae_u32 v) {uint8 *b = (uint8 *)a; b[0] = v >> 8; b[1] = v;}
198    
199     #endif /* CPU_CAN_ACCESS_UNALIGNED */
200    
201     #endif /* WORDS_BIGENDIAN */
202    
203     #define do_get_mem_byte(a) ((uae_u32)*((uae_u8 *)(a)))
204     #define do_put_mem_byte(a, v) (*(uae_u8 *)(a) = (v))
205    
206     #define call_mem_get_func(func, addr) ((*func)(addr))
207     #define call_mem_put_func(func, addr, v) ((*func)(addr, v))
208     #define __inline__ inline
209     #define CPU_EMU_SIZE 0
210     #undef USE_MAPPED_MEMORY
211     #undef CAN_MAP_MEMORY
212     #undef NO_INLINE_MEMORY_ACCESS
213     #undef MD_HAVE_MEM_1_FUNCS
214     #undef USE_COMPILER
215     #define ENUMDECL typedef enum
216     #define ENUMNAME(name) name
217     #define write_log printf
218    
219     #ifdef X86_ASSEMBLY
220     #define ASM_SYM_FOR_FUNC(a) __asm__(a)
221     #else
222     #define ASM_SYM_FOR_FUNC(a)
223     #endif
224    
225     #ifndef REGPARAM
226     # define REGPARAM
227     #endif
228     #define REGPARAM2
229    
230     #endif