| 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 3 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, see <http://www.gnu.org/licenses/>. |
| 17 | |
| 18 | */ |
| 19 | |
| 20 | |
| 21 | #ifndef _OS_EMUL_C_ |
| 22 | #define _OS_EMUL_C_ |
| 23 | |
| 24 | #include "cpu.h" |
| 25 | #include "idecode.h" |
| 26 | #include "os_emul.h" |
| 27 | |
| 28 | #include "emul_generic.h" |
| 29 | #include "emul_netbsd.h" |
| 30 | #include "emul_unix.h" |
| 31 | #include "emul_chirp.h" |
| 32 | #include "emul_bugapi.h" |
| 33 | |
| 34 | static const os_emul *(os_emulations[]) = { |
| 35 | &emul_chirp, |
| 36 | &emul_bugapi, |
| 37 | &emul_netbsd, |
| 38 | &emul_solaris, |
| 39 | &emul_linux, |
| 40 | 0 |
| 41 | }; |
| 42 | |
| 43 | |
| 44 | INLINE_OS_EMUL\ |
| 45 | (os_emul *) |
| 46 | os_emul_create(const char *file_name, |
| 47 | device *root) |
| 48 | { |
| 49 | const char *emulation_name = NULL; |
| 50 | bfd *image; |
| 51 | os_emul *chosen_emulation = NULL; |
| 52 | |
| 53 | bfd_init(); /* would never hurt */ |
| 54 | |
| 55 | /* open the file */ |
| 56 | image = bfd_openr(file_name, NULL); |
| 57 | if (image == NULL) { |
| 58 | bfd_perror(file_name); |
| 59 | error("nothing loaded\n"); |
| 60 | } |
| 61 | |
| 62 | /* check it is an executable */ |
| 63 | if (!bfd_check_format(image, bfd_object)) { |
| 64 | TRACE(trace_tbd, |
| 65 | ("FIXME - should check more than just bfd_check_format\n")); |
| 66 | TRACE(trace_os_emul, |
| 67 | ("%s not an executable, assumeing a device file\n", file_name)); |
| 68 | bfd_close(image); |
| 69 | image = NULL; |
| 70 | } |
| 71 | |
| 72 | /* if a device file, load that before trying the emulations on */ |
| 73 | if (image == NULL) { |
| 74 | psim_merge_device_file(root, file_name); |
| 75 | } |
| 76 | |
| 77 | /* see if the device tree already specifies the required emulation */ |
| 78 | if (tree_find_property(root, "/openprom/options/os-emul") != NULL) |
| 79 | emulation_name = |
| 80 | tree_find_string_property(root, "/openprom/options/os-emul"); |
| 81 | else |
| 82 | emulation_name = NULL; |
| 83 | |
| 84 | /* go through each emulation to see if they reconize it. FIXME - |
| 85 | should have some sort of imported table from a separate file */ |
| 86 | { |
| 87 | os_emul_data *emul_data; |
| 88 | const os_emul **possible_emulation; |
| 89 | chosen_emulation = NULL; |
| 90 | for (possible_emulation = os_emulations, emul_data = NULL; |
| 91 | *possible_emulation != NULL && emul_data == NULL; |
| 92 | possible_emulation++) { |
| 93 | emul_data = (*possible_emulation)->create(root, |
| 94 | image, |
| 95 | emulation_name); |
| 96 | if (emul_data != NULL) { |
| 97 | chosen_emulation = ZALLOC(os_emul); |
| 98 | *chosen_emulation = **possible_emulation; |
| 99 | chosen_emulation->data = emul_data; |
| 100 | } |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | /* clean up */ |
| 105 | if (image != NULL) |
| 106 | bfd_close(image); |
| 107 | return chosen_emulation; |
| 108 | } |
| 109 | |
| 110 | INLINE_OS_EMUL\ |
| 111 | (void) |
| 112 | os_emul_init(os_emul *emulation, |
| 113 | int nr_cpus) |
| 114 | { |
| 115 | if (emulation != (os_emul*)0) |
| 116 | emulation->init(emulation->data, nr_cpus); |
| 117 | } |
| 118 | |
| 119 | INLINE_OS_EMUL\ |
| 120 | (void) |
| 121 | os_emul_system_call(cpu *processor, |
| 122 | unsigned_word cia) |
| 123 | { |
| 124 | os_emul *emulation = cpu_os_emulation(processor); |
| 125 | if (emulation != (os_emul*)0 && emulation->system_call != 0) |
| 126 | emulation->system_call(processor, cia, emulation->data); |
| 127 | else |
| 128 | error("System call emulation not available\n"); |
| 129 | } |
| 130 | |
| 131 | INLINE_OS_EMUL\ |
| 132 | (int) |
| 133 | os_emul_instruction_call(cpu *processor, |
| 134 | unsigned_word cia, |
| 135 | unsigned_word ra) |
| 136 | { |
| 137 | os_emul *emulation = cpu_os_emulation(processor); |
| 138 | if (emulation != (os_emul*)0 && emulation->instruction_call != 0) |
| 139 | return emulation->instruction_call(processor, cia, ra, emulation->data); |
| 140 | else |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | |
| 145 | #endif /* _OS_EMUL_C_ */ |