1/* -----------------------------------------------------------------*-C-*-
2   ffitarget.h - Copyright (c) 2012  Anthony Green
3                 Copyright (c) 1996-2003  Red Hat, Inc.
4   Target configuration macros for MIPS.
5
6   Permission is hereby granted, free of charge, to any person obtaining
7   a copy of this software and associated documentation files (the
8   ``Software''), to deal in the Software without restriction, including
9   without limitation the rights to use, copy, modify, merge, publish,
10   distribute, sublicense, and/or sell copies of the Software, and to
11   permit persons to whom the Software is furnished to do so, subject to
12   the following conditions:
13
14   The above copyright notice and this permission notice shall be included
15   in all copies or substantial portions of the Software.
16
17   THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
18   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20   NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
24   DEALINGS IN THE SOFTWARE.
25
26   ----------------------------------------------------------------------- */
27
28#ifndef LIBFFI_TARGET_H
29#define LIBFFI_TARGET_H
30
31#ifndef LIBFFI_H
32#error "Please do not include ffitarget.h directly into your source.  Use ffi.h instead."
33#endif
34
35#ifdef linux
36# include <asm/sgidefs.h>
37#elif defined(__rtems__)
38/*
39 * Subprogram calling convention - copied from sgidefs.h
40 */
41#define _MIPS_SIM_ABI32		1
42#define _MIPS_SIM_NABI32	2
43#define _MIPS_SIM_ABI64		3
44#elif !defined(__OpenBSD__)
45# include <sgidefs.h>
46#endif
47
48#  ifndef _ABIN32
49#    define _ABIN32 _MIPS_SIM_NABI32
50#  endif
51#  ifndef _ABI64
52#    define _ABI64 _MIPS_SIM_ABI64
53#  endif
54#  ifndef _ABIO32
55#    define _ABIO32 _MIPS_SIM_ABI32
56#  endif
57
58#if !defined(_MIPS_SIM)
59# error -- something is very wrong --
60#else
61#  if (_MIPS_SIM==_ABIN32 && defined(_ABIN32)) || (_MIPS_SIM==_ABI64 && defined(_ABI64))
62#    define FFI_MIPS_N32
63#  else
64#    if (_MIPS_SIM==_ABIO32 && defined(_ABIO32))
65#      define FFI_MIPS_O32
66#    else
67#     error -- this is an unsupported platform --
68#    endif
69#  endif
70#endif
71
72#ifdef FFI_MIPS_O32
73/* O32 stack frames have 32bit integer args */
74#  define FFI_SIZEOF_ARG    4
75#else
76/* N32 and N64 frames have 64bit integer args */
77#  define FFI_SIZEOF_ARG    8
78#  if _MIPS_SIM == _ABIN32
79#    define FFI_SIZEOF_JAVA_RAW  4
80#  endif
81#endif
82
83#define FFI_FLAG_BITS 2
84
85/* SGI's strange assembler requires that we multiply by 4 rather
86   than shift left by FFI_FLAG_BITS */
87
88#define FFI_ARGS_D   FFI_TYPE_DOUBLE
89#define FFI_ARGS_F   FFI_TYPE_FLOAT
90#define FFI_ARGS_DD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_DOUBLE
91#define FFI_ARGS_FF  FFI_TYPE_FLOAT * 4 +  FFI_TYPE_FLOAT
92#define FFI_ARGS_FD  FFI_TYPE_DOUBLE * 4 + FFI_TYPE_FLOAT
93#define FFI_ARGS_DF  FFI_TYPE_FLOAT * 4 + FFI_TYPE_DOUBLE
94
95/* Needed for N32 structure returns */
96#define FFI_TYPE_SMALLSTRUCT  FFI_TYPE_UINT8
97#define FFI_TYPE_SMALLSTRUCT2 FFI_TYPE_SINT8
98
99#if 0
100/* The SGI assembler can't handle this.. */
101#define FFI_TYPE_STRUCT_DD (( FFI_ARGS_DD ) << 4) + FFI_TYPE_STRUCT
102/* (and so on) */
103#else
104/* ...so we calculate these by hand! */
105#define FFI_TYPE_STRUCT_D      61
106#define FFI_TYPE_STRUCT_F      45
107#define FFI_TYPE_STRUCT_DD     253
108#define FFI_TYPE_STRUCT_FF     173
109#define FFI_TYPE_STRUCT_FD     237
110#define FFI_TYPE_STRUCT_DF     189
111#define FFI_TYPE_STRUCT_SMALL  93
112#define FFI_TYPE_STRUCT_SMALL2 109
113
114/* and for n32 soft float, add 16 * 2^4 */
115#define FFI_TYPE_STRUCT_D_SOFT      317
116#define FFI_TYPE_STRUCT_F_SOFT      301
117#define FFI_TYPE_STRUCT_DD_SOFT     509
118#define FFI_TYPE_STRUCT_FF_SOFT     429
119#define FFI_TYPE_STRUCT_FD_SOFT     493
120#define FFI_TYPE_STRUCT_DF_SOFT     445
121#define FFI_TYPE_STRUCT_SOFT        16
122#endif
123
124#ifdef LIBFFI_ASM
125#define v0 $2
126#define v1 $3
127#define a0 $4
128#define a1 $5
129#define a2 $6
130#define a3 $7
131#define a4 $8
132#define a5 $9
133#define a6 $10
134#define a7 $11
135#define t0 $8
136#define t1 $9
137#define t2 $10
138#define t3 $11
139#define t4 $12
140#define t5 $13
141#define t6 $14
142#define t7 $15
143#define t8 $24
144#define t9 $25
145#define ra $31
146
147#ifdef FFI_MIPS_O32
148# define REG_L	lw
149# define REG_S	sw
150# define SUBU	subu
151# define ADDU	addu
152# define SRL	srl
153# define LI	li
154#else /* !FFI_MIPS_O32 */
155# define REG_L	ld
156# define REG_S	sd
157# define SUBU	dsubu
158# define ADDU	daddu
159# define SRL	dsrl
160# define LI 	dli
161# if (_MIPS_SIM==_ABI64)
162#  define LA dla
163#  define EH_FRAME_ALIGN 3
164#  define FDE_ADDR_BYTES .8byte
165# else
166#  define LA la
167#  define EH_FRAME_ALIGN 2
168#  define FDE_ADDR_BYTES .4byte
169# endif /* _MIPS_SIM==_ABI64 */
170#endif /* !FFI_MIPS_O32 */
171#else /* !LIBFFI_ASM */
172# ifdef __GNUC__
173#  ifdef FFI_MIPS_O32
174/* O32 stack frames have 32bit integer args */
175typedef unsigned int     ffi_arg __attribute__((__mode__(__SI__)));
176typedef signed   int     ffi_sarg __attribute__((__mode__(__SI__)));
177#else
178/* N32 and N64 frames have 64bit integer args */
179typedef unsigned int     ffi_arg __attribute__((__mode__(__DI__)));
180typedef signed   int     ffi_sarg __attribute__((__mode__(__DI__)));
181#  endif
182# else
183#  ifdef FFI_MIPS_O32
184/* O32 stack frames have 32bit integer args */
185typedef __uint32_t ffi_arg;
186typedef __int32_t ffi_sarg;
187#  else
188/* N32 and N64 frames have 64bit integer args */
189typedef __uint64_t ffi_arg;
190typedef __int64_t ffi_sarg;
191#  endif
192# endif /* __GNUC__ */
193
194typedef enum ffi_abi {
195  FFI_FIRST_ABI = 0,
196  FFI_O32,
197  FFI_N32,
198  FFI_N64,
199  FFI_O32_SOFT_FLOAT,
200  FFI_N32_SOFT_FLOAT,
201  FFI_N64_SOFT_FLOAT,
202  FFI_LAST_ABI,
203
204#ifdef FFI_MIPS_O32
205#ifdef __mips_soft_float
206  FFI_DEFAULT_ABI = FFI_O32_SOFT_FLOAT
207#else
208  FFI_DEFAULT_ABI = FFI_O32
209#endif
210#else
211# if _MIPS_SIM==_ABI64
212#  ifdef __mips_soft_float
213  FFI_DEFAULT_ABI = FFI_N64_SOFT_FLOAT
214#  else
215  FFI_DEFAULT_ABI = FFI_N64
216#  endif
217# else
218#  ifdef __mips_soft_float
219  FFI_DEFAULT_ABI = FFI_N32_SOFT_FLOAT
220#  else
221  FFI_DEFAULT_ABI = FFI_N32
222#  endif
223# endif
224#endif
225} ffi_abi;
226
227#define FFI_EXTRA_CIF_FIELDS unsigned rstruct_flag
228#endif /* !LIBFFI_ASM */
229
230/* ---- Definitions for closures ----------------------------------------- */
231
232#if defined(FFI_MIPS_O32)
233#define FFI_CLOSURES 1
234#define FFI_TRAMPOLINE_SIZE 20
235#else
236/* N32/N64. */
237# define FFI_CLOSURES 1
238#if _MIPS_SIM==_ABI64
239#define FFI_TRAMPOLINE_SIZE 52
240#else
241#define FFI_TRAMPOLINE_SIZE 20
242#endif
243#endif /* FFI_MIPS_O32 */
244#define FFI_NATIVE_RAW_API 0
245
246#endif
247
248