sh4/r2d: update pci, usb and kernel management
[qemu/sh4.git] / thunk.h
blobeffc5e24462fa76a432bf9e5eeadfa110ce77ace
1 /*
2 * Generic thunking code to convert data between host and target CPU
4 * Copyright (c) 2003 Fabrice Bellard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #ifndef THUNK_H
21 #define THUNK_H
23 #include <inttypes.h>
24 #include "cpu.h"
26 /* types enums definitions */
28 typedef enum argtype {
29 TYPE_NULL,
30 TYPE_CHAR,
31 TYPE_SHORT,
32 TYPE_INT,
33 TYPE_LONG,
34 TYPE_ULONG,
35 TYPE_PTRVOID, /* pointer on unknown data */
36 TYPE_LONGLONG,
37 TYPE_ULONGLONG,
38 TYPE_PTR,
39 TYPE_ARRAY,
40 TYPE_STRUCT,
41 } argtype;
43 #define MK_PTR(type) TYPE_PTR, type
44 #define MK_ARRAY(type, size) TYPE_ARRAY, size, type
45 #define MK_STRUCT(id) TYPE_STRUCT, id
47 #define THUNK_TARGET 0
48 #define THUNK_HOST 1
50 typedef struct {
51 /* standard struct handling */
52 const argtype *field_types;
53 int nb_fields;
54 int *field_offsets[2];
55 /* special handling */
56 void (*convert[2])(void *dst, const void *src);
57 int size[2];
58 int align[2];
59 const char *name;
60 } StructEntry;
62 /* Translation table for bitmasks... */
63 typedef struct bitmask_transtbl {
64 unsigned int x86_mask;
65 unsigned int x86_bits;
66 unsigned int alpha_mask;
67 unsigned int alpha_bits;
68 } bitmask_transtbl;
70 void thunk_register_struct(int id, const char *name, const argtype *types);
71 void thunk_register_struct_direct(int id, const char *name,
72 const StructEntry *se1);
73 const argtype *thunk_convert(void *dst, const void *src,
74 const argtype *type_ptr, int to_host);
75 #ifndef NO_THUNK_TYPE_SIZE
77 extern StructEntry struct_entries[];
79 int thunk_type_size_array(const argtype *type_ptr, int is_host);
80 int thunk_type_align_array(const argtype *type_ptr, int is_host);
82 static inline int thunk_type_size(const argtype *type_ptr, int is_host)
84 int type, size;
85 const StructEntry *se;
87 type = *type_ptr;
88 switch(type) {
89 case TYPE_CHAR:
90 return 1;
91 case TYPE_SHORT:
92 return 2;
93 case TYPE_INT:
94 return 4;
95 case TYPE_LONGLONG:
96 case TYPE_ULONGLONG:
97 return 8;
98 case TYPE_LONG:
99 case TYPE_ULONG:
100 case TYPE_PTRVOID:
101 case TYPE_PTR:
102 if (is_host) {
103 return HOST_LONG_SIZE;
104 } else {
105 return TARGET_ABI_BITS / 8;
107 break;
108 case TYPE_ARRAY:
109 size = type_ptr[1];
110 return size * thunk_type_size_array(type_ptr + 2, is_host);
111 case TYPE_STRUCT:
112 se = struct_entries + type_ptr[1];
113 return se->size[is_host];
114 default:
115 return -1;
119 static inline int thunk_type_align(const argtype *type_ptr, int is_host)
121 int type;
122 const StructEntry *se;
124 type = *type_ptr;
125 switch(type) {
126 case TYPE_CHAR:
127 return 1;
128 case TYPE_SHORT:
129 return 2;
130 case TYPE_INT:
131 return 4;
132 case TYPE_LONGLONG:
133 case TYPE_ULONGLONG:
134 return 8;
135 case TYPE_LONG:
136 case TYPE_ULONG:
137 case TYPE_PTRVOID:
138 case TYPE_PTR:
139 if (is_host) {
140 return HOST_LONG_SIZE;
141 } else {
142 return TARGET_ABI_BITS / 8;
144 break;
145 case TYPE_ARRAY:
146 return thunk_type_align_array(type_ptr + 2, is_host);
147 case TYPE_STRUCT:
148 se = struct_entries + type_ptr[1];
149 return se->align[is_host];
150 default:
151 return -1;
155 #endif /* NO_THUNK_TYPE_SIZE */
157 unsigned int target_to_host_bitmask(unsigned int x86_mask,
158 const bitmask_transtbl * trans_tbl);
159 unsigned int host_to_target_bitmask(unsigned int alpha_mask,
160 const bitmask_transtbl * trans_tbl);
162 #endif