1 /* OpenACC Runtime Library: acc_device_host. 2 3 Copyright (C) 2013-2018 Free Software Foundation, Inc. 4 5 Contributed by Mentor Embedded. 6 7 This file is part of the GNU Offloading and Multi Processing Library 8 (libgomp). 9 10 Libgomp is free software; you can redistribute it and/or modify it 11 under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 3, or (at your option) 13 any later version. 14 15 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY 16 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 17 FOR A PARTICULAR PURPOSE. See the GNU General Public License for 18 more details. 19 20 Under Section 7 of GPL version 3, you are granted additional 21 permissions described in the GCC Runtime Library Exception, version 22 3.1, as published by the Free Software Foundation. 23 24 You should have received a copy of the GNU General Public License and 25 a copy of the GCC Runtime Library Exception along with this program; 26 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 27 <http://www.gnu.org/licenses/>. */ 28 29 #include "libgomp.h" 30 #include "oacc-int.h" 31 #include "gomp-constants.h" 32 33 #include <stdbool.h> 34 #include <stddef.h> 35 #include <stdint.h> 36 37 static struct gomp_device_descr host_dispatch; 38 39 static const char * 40 host_get_name (void) 41 { 42 return host_dispatch.name; 43 } 44 45 static unsigned int 46 host_get_caps (void) 47 { 48 return host_dispatch.capabilities; 49 } 50 51 static int 52 host_get_type (void) 53 { 54 return host_dispatch.type; 55 } 56 57 static int 58 host_get_num_devices (void) 59 { 60 return 1; 61 } 62 63 static bool 64 host_init_device (int n __attribute__ ((unused))) 65 { 66 return true; 67 } 68 69 static bool 70 host_fini_device (int n __attribute__ ((unused))) 71 { 72 return true; 73 } 74 75 static unsigned 76 host_version (void) 77 { 78 return GOMP_VERSION; 79 } 80 81 static int 82 host_load_image (int n __attribute__ ((unused)), 83 unsigned v __attribute__ ((unused)), 84 const void *t __attribute__ ((unused)), 85 struct addr_pair **r __attribute__ ((unused))) 86 { 87 return 0; 88 } 89 90 static bool 91 host_unload_image (int n __attribute__ ((unused)), 92 unsigned v __attribute__ ((unused)), 93 const void *t __attribute__ ((unused))) 94 { 95 return true; 96 } 97 98 static void * 99 host_alloc (int n __attribute__ ((unused)), size_t s) 100 { 101 return gomp_malloc (s); 102 } 103 104 static bool 105 host_free (int n __attribute__ ((unused)), void *p) 106 { 107 free (p); 108 return true; 109 } 110 111 static bool 112 host_dev2host (int n __attribute__ ((unused)), 113 void *h __attribute__ ((unused)), 114 const void *d __attribute__ ((unused)), 115 size_t s __attribute__ ((unused))) 116 { 117 return true; 118 } 119 120 static bool 121 host_host2dev (int n __attribute__ ((unused)), 122 void *d __attribute__ ((unused)), 123 const void *h __attribute__ ((unused)), 124 size_t s __attribute__ ((unused))) 125 { 126 return true; 127 } 128 129 static void 130 host_run (int n __attribute__ ((unused)), void *fn_ptr, void *vars, 131 void **args __attribute__((unused))) 132 { 133 void (*fn)(void *) = (void (*)(void *)) fn_ptr; 134 135 fn (vars); 136 } 137 138 static void 139 host_openacc_exec (void (*fn) (void *), 140 size_t mapnum __attribute__ ((unused)), 141 void **hostaddrs, 142 void **devaddrs __attribute__ ((unused)), 143 int async __attribute__ ((unused)), 144 unsigned *dims __attribute ((unused)), 145 void *targ_mem_desc __attribute__ ((unused))) 146 { 147 fn (hostaddrs); 148 } 149 150 static void 151 host_openacc_register_async_cleanup (void *targ_mem_desc __attribute__ ((unused)), 152 int async __attribute__ ((unused))) 153 { 154 } 155 156 static int 157 host_openacc_async_test (int async __attribute__ ((unused))) 158 { 159 return 1; 160 } 161 162 static int 163 host_openacc_async_test_all (void) 164 { 165 return 1; 166 } 167 168 static void 169 host_openacc_async_wait (int async __attribute__ ((unused))) 170 { 171 } 172 173 static void 174 host_openacc_async_wait_async (int async1 __attribute__ ((unused)), 175 int async2 __attribute__ ((unused))) 176 { 177 } 178 179 static void 180 host_openacc_async_wait_all (void) 181 { 182 } 183 184 static void 185 host_openacc_async_wait_all_async (int async __attribute__ ((unused))) 186 { 187 } 188 189 static void 190 host_openacc_async_set_async (int async __attribute__ ((unused))) 191 { 192 } 193 194 static void * 195 host_openacc_create_thread_data (int ord __attribute__ ((unused))) 196 { 197 return NULL; 198 } 199 200 static void 201 host_openacc_destroy_thread_data (void *tls_data __attribute__ ((unused))) 202 { 203 } 204 205 static struct gomp_device_descr host_dispatch = 206 { 207 .name = "host", 208 .capabilities = (GOMP_OFFLOAD_CAP_SHARED_MEM 209 | GOMP_OFFLOAD_CAP_NATIVE_EXEC 210 | GOMP_OFFLOAD_CAP_OPENACC_200), 211 .target_id = 0, 212 .type = OFFLOAD_TARGET_TYPE_HOST, 213 214 .get_name_func = host_get_name, 215 .get_caps_func = host_get_caps, 216 .get_type_func = host_get_type, 217 .get_num_devices_func = host_get_num_devices, 218 .init_device_func = host_init_device, 219 .fini_device_func = host_fini_device, 220 .version_func = host_version, 221 .load_image_func = host_load_image, 222 .unload_image_func = host_unload_image, 223 .alloc_func = host_alloc, 224 .free_func = host_free, 225 .dev2host_func = host_dev2host, 226 .host2dev_func = host_host2dev, 227 .run_func = host_run, 228 229 .mem_map = { NULL }, 230 /* .lock initilized in goacc_host_init. */ 231 .state = GOMP_DEVICE_UNINITIALIZED, 232 233 .openacc = { 234 .data_environ = NULL, 235 236 .exec_func = host_openacc_exec, 237 238 .register_async_cleanup_func = host_openacc_register_async_cleanup, 239 240 .async_test_func = host_openacc_async_test, 241 .async_test_all_func = host_openacc_async_test_all, 242 .async_wait_func = host_openacc_async_wait, 243 .async_wait_async_func = host_openacc_async_wait_async, 244 .async_wait_all_func = host_openacc_async_wait_all, 245 .async_wait_all_async_func = host_openacc_async_wait_all_async, 246 .async_set_async_func = host_openacc_async_set_async, 247 248 .create_thread_data_func = host_openacc_create_thread_data, 249 .destroy_thread_data_func = host_openacc_destroy_thread_data, 250 251 .cuda = { 252 .get_current_device_func = NULL, 253 .get_current_context_func = NULL, 254 .get_stream_func = NULL, 255 .set_stream_func = NULL, 256 } 257 } 258 }; 259 260 /* Initialize and register this device type. */ 261 void 262 goacc_host_init (void) 263 { 264 gomp_mutex_init (&host_dispatch.lock); 265 goacc_register (&host_dispatch); 266 } 267