1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/* memory access abstraction layer for forth kernel
*
* Copyright (C) 2005 Stefan Reinauer
*
* See the file "COPYING" for further information about
* the copyright and warranty status of this work.
*/
#ifndef __CROSS_H
#define __CROSS_H 1
/* The forthstrap compiler has to abstract the underlying dictionary
* type: big/little endian, 32/64bit. All other binaries shall use
* unchanged memory access for performance.
*/
/* byte swapping */
#ifndef SWAP_ENDIANNESS
/* trivial case - we don't have to change anything */
#define read_ucell(addr) (*(ucell *)(addr))
#define read_cell(addr) (*(cell *)(addr))
#define read_long(addr) (*(u32 *)(addr))
#define read_word(addr) (*(u16 *)(addr))
#define read_byte(addr) (*(u8 *)(addr))
#define write_ucell(addr, value) {*(ucell *)(addr)=(value);}
#define write_cell(addr, value) {*(cell *)(addr)=(value);}
#define write_long(addr, value) {*(u32 *)(addr)=(value);}
#define write_word(addr, value) {*(u16 *)(addr)=(value);}
#define write_byte(addr, value) {*(u8 *)(addr)=(value);}
#define target_ucell(x) (x)
#define target_cell(x) (x)
#define target_long(x) (x)
#define target_ulong(x) (x)
#else /* SWAP_ENDIANNESS */
#define target_word(value) ( (((value)>>8)&0xff) | (((value)&0xff)<<8) )
#define target_long(value) ( (((value)&0xff000000)>>24)|(((value)&0x00ff0000)>>8)|(((value)&0xff00)<<8)|(((value)&0xff)<<24) )
#define target_ulong(value) (target_long(value))
#if BITS==32
#define target_ucell(value) ((ucell)target_long(value))
#define target_cell(value) ((cell)target_long(value))
#elif BITS==64
#define target_ucell(value) \
((((ucell)target_long((value) & 0xffffffff)) << 32) | \
((ucell)target_long((value) >> 32)))
#define target_cell(value) \
((((cell)target_long((value) & 0xffffffff)) << 32) | \
((cell)target_long((value) >> 32)))
#else
#error "Endianness not supported. Please report."
#endif
#define read_ucell(addr) target_ucell(*(ucell *)(addr))
#define read_cell(addr) target_cell(*(cell *)(addr))
#define read_long(addr) target_long(*(u32 *)(addr))
#define read_word(addr) target_word(*(u16 *)(addr))
#define read_byte(addr) (*(u8 *)(addr))
#define write_ucell(addr, value) {*(ucell *)(addr)=target_ucell(value);}
#define write_cell(addr, value) {*(cell *)(addr)=target_cell(value);}
#define write_long(addr, value) {*(u32 *)(addr)=target_long(value);}
#define write_word(addr, value) {*(u16 *)(addr)=target_word(value);}
#define write_byte(addr, value) {*(u8 *)(addr)=(value);}
#endif
#ifdef CONFIG_LITTLE_ENDIAN
#define unaligned_read_word(addr) \
(read_byte(addr)|(read_byte((u8 *)addr+1)<<8))
#define unaligned_read_long(addr) \
(unaligned_read_word(addr)|(unaligned_read_word((u8 *)addr+2)<<16))
#define unaligned_write_word(addr, value) \
write_byte(addr, (value & 0xff)); write_byte((u8 *)(addr+1), (value>>8))
#define unaligned_write_long(addr, value) \
unaligned_write_word(addr, (value & 0xffff)); \
unaligned_write_word((addr + 2), (value >> 16))
#endif
#ifdef CONFIG_BIG_ENDIAN
#define unaligned_read_word(addr) \
((read_byte(addr)<<8)|read_byte((u8 *)addr+1))
#define unaligned_read_long(addr) \
((unaligned_read_word(addr)<<16)|unaligned_read_word((u8 *)addr+2))
#define unaligned_write_word(addr, value) \
write_byte(addr, (value >> 8)); write_byte((u8 *)(addr+1), (value & 0xff))
#define unaligned_write_long(addr, value) \
unaligned_write_word(addr, (value >> 16)); \
unaligned_write_word((addr + 2), (value & 0xffff))
#endif
/* bit width handling */
#if BITS==32
#define FMT_CELL_x PRIx32
#define FMT_CELL_d PRId32
#else
#define FMT_CELL_x PRIx64
#define FMT_CELL_d PRId64
#endif
#ifdef NATIVE_BITWIDTH_SMALLER_THAN_HOST_BITWIDTH
extern unsigned long base_address;
#define pointer2cell(x) ((ucell)(((unsigned long)(x))-base_address))
#define cell2pointer(x) ((u8 *)(((unsigned long)(x))+base_address))
#endif
#ifdef NATIVE_BITWIDTH_LARGER_THAN_HOST_BITWIDTH
#define pointer2cell(x) ((ucell)(unsigned long)(x))
#define cell2pointer(x) ((u8 *)((unsigned long)(x)&0xFFFFFFFFUL))
#endif
#endif
|
