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c906108c SS |
1 | /* This file is part of the program psim. |
2 | ||
3 | Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au> | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the Free Software | |
17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
18 | ||
19 | */ | |
20 | ||
21 | ||
22 | #ifndef _OS_EMUL_C_ | |
23 | #define _OS_EMUL_C_ | |
24 | ||
25 | #include "cpu.h" | |
26 | #include "idecode.h" | |
27 | #include "os_emul.h" | |
28 | ||
29 | #include "emul_generic.h" | |
30 | #include "emul_netbsd.h" | |
31 | #include "emul_unix.h" | |
32 | #include "emul_chirp.h" | |
33 | #include "emul_bugapi.h" | |
34 | ||
35 | static const os_emul *(os_emulations[]) = { | |
36 | &emul_chirp, | |
37 | &emul_bugapi, | |
38 | &emul_netbsd, | |
39 | &emul_solaris, | |
40 | &emul_linux, | |
41 | 0 | |
42 | }; | |
43 | ||
44 | ||
45 | INLINE_OS_EMUL\ | |
46 | (os_emul *) | |
47 | os_emul_create(const char *file_name, | |
48 | device *root) | |
49 | { | |
50 | const char *emulation_name = NULL; | |
51 | bfd *image; | |
52 | os_emul *chosen_emulation = NULL; | |
53 | ||
54 | bfd_init(); /* would never hurt */ | |
55 | ||
56 | /* open the file */ | |
57 | image = bfd_openr(file_name, NULL); | |
58 | if (image == NULL) { | |
59 | bfd_perror(file_name); | |
60 | error("nothing loaded\n"); | |
61 | } | |
62 | ||
63 | /* check it is an executable */ | |
64 | if (!bfd_check_format(image, bfd_object)) { | |
65 | TRACE(trace_tbd, | |
66 | ("FIXME - should check more than just bfd_check_format\n")); | |
67 | TRACE(trace_os_emul, | |
68 | ("%s not an executable, assumeing a device file\n", file_name)); | |
69 | bfd_close(image); | |
70 | image = NULL; | |
71 | } | |
72 | ||
73 | /* if a device file, load that before trying the emulations on */ | |
74 | if (image == NULL) { | |
75 | psim_merge_device_file(root, file_name); | |
76 | } | |
77 | ||
78 | /* see if the device tree already specifies the required emulation */ | |
79 | if (tree_find_property(root, "/openprom/options/os-emul") != NULL) | |
80 | emulation_name = | |
81 | tree_find_string_property(root, "/openprom/options/os-emul"); | |
82 | else | |
83 | emulation_name = NULL; | |
84 | ||
85 | /* go through each emulation to see if they reconize it. FIXME - | |
86 | should have some sort of imported table from a separate file */ | |
87 | { | |
88 | os_emul_data *emul_data; | |
89 | const os_emul **possible_emulation; | |
90 | chosen_emulation = NULL; | |
91 | for (possible_emulation = os_emulations, emul_data = NULL; | |
92 | *possible_emulation != NULL && emul_data == NULL; | |
93 | possible_emulation++) { | |
94 | emul_data = (*possible_emulation)->create(root, | |
95 | image, | |
96 | emulation_name); | |
97 | if (emul_data != NULL) { | |
98 | chosen_emulation = ZALLOC(os_emul); | |
99 | *chosen_emulation = **possible_emulation; | |
100 | chosen_emulation->data = emul_data; | |
101 | } | |
102 | } | |
103 | } | |
104 | ||
105 | /* clean up */ | |
106 | if (image != NULL) | |
107 | bfd_close(image); | |
108 | return chosen_emulation; | |
109 | } | |
110 | ||
111 | INLINE_OS_EMUL\ | |
112 | (void) | |
113 | os_emul_init(os_emul *emulation, | |
114 | int nr_cpus) | |
115 | { | |
116 | if (emulation != (os_emul*)0) | |
117 | emulation->init(emulation->data, nr_cpus); | |
118 | } | |
119 | ||
120 | INLINE_OS_EMUL\ | |
121 | (void) | |
122 | os_emul_system_call(cpu *processor, | |
123 | unsigned_word cia) | |
124 | { | |
125 | os_emul *emulation = cpu_os_emulation(processor); | |
126 | if (emulation != (os_emul*)0 && emulation->system_call != 0) | |
127 | emulation->system_call(processor, cia, emulation->data); | |
128 | else | |
129 | error("System call emulation not available\n"); | |
130 | } | |
131 | ||
132 | INLINE_OS_EMUL\ | |
133 | (int) | |
134 | os_emul_instruction_call(cpu *processor, | |
135 | unsigned_word cia, | |
136 | unsigned_word ra) | |
137 | { | |
138 | os_emul *emulation = cpu_os_emulation(processor); | |
139 | if (emulation != (os_emul*)0 && emulation->instruction_call != 0) | |
140 | return emulation->instruction_call(processor, cia, ra, emulation->data); | |
141 | else | |
142 | return 0; | |
143 | } | |
144 | ||
145 | ||
146 | #endif /* _OS_EMUL_C_ */ |