Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 1 | /* |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 2 | * (C) Copyright 2007-2008 Semihalf, Rafal Jaworowski <raj@semihalf.com> |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 3 | * |
Wolfgang Denk | 1a45966 | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 4 | * SPDX-License-Identifier: GPL-2.0+ |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <common.h> |
| 8 | #include <linux/types.h> |
| 9 | #include <api_public.h> |
| 10 | |
| 11 | #include "glue.h" |
| 12 | |
| 13 | static int valid_sig(struct api_signature *sig) |
| 14 | { |
| 15 | uint32_t checksum; |
| 16 | struct api_signature s; |
| 17 | |
| 18 | if (sig == NULL) |
| 19 | return 0; |
| 20 | /* |
| 21 | * Clear the checksum field (in the local copy) so as to calculate the |
| 22 | * CRC with the same initial contents as at the time when the sig was |
| 23 | * produced |
| 24 | */ |
| 25 | s = *sig; |
| 26 | s.checksum = 0; |
| 27 | |
| 28 | checksum = crc32(0, (unsigned char *)&s, sizeof(struct api_signature)); |
| 29 | |
| 30 | if (checksum != sig->checksum) |
| 31 | return 0; |
| 32 | |
| 33 | return 1; |
| 34 | } |
| 35 | |
| 36 | /* |
| 37 | * Searches for the U-Boot API signature |
| 38 | * |
| 39 | * returns 1/0 depending on found/not found result |
| 40 | */ |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 41 | int api_search_sig(struct api_signature **sig) |
| 42 | { |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 43 | unsigned char *sp; |
Rafal Jaworowski | b84d7d8 | 2009-01-23 13:27:15 +0100 | [diff] [blame] | 44 | uint32_t search_start = 0; |
| 45 | uint32_t search_end = 0; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 46 | |
| 47 | if (sig == NULL) |
| 48 | return 0; |
| 49 | |
Rafal Jaworowski | b84d7d8 | 2009-01-23 13:27:15 +0100 | [diff] [blame] | 50 | if (search_hint == 0) |
| 51 | search_hint = 255 * 1024 * 1024; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 52 | |
Rafal Jaworowski | b84d7d8 | 2009-01-23 13:27:15 +0100 | [diff] [blame] | 53 | search_start = search_hint & ~0x000fffff; |
| 54 | search_end = search_start + API_SEARCH_LEN - API_SIG_MAGLEN; |
| 55 | |
| 56 | sp = (unsigned char *)search_start; |
| 57 | while ((sp + API_SIG_MAGLEN) < (unsigned char *)search_end) { |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 58 | if (!memcmp(sp, API_SIG_MAGIC, API_SIG_MAGLEN)) { |
| 59 | *sig = (struct api_signature *)sp; |
| 60 | if (valid_sig(*sig)) |
| 61 | return 1; |
| 62 | } |
| 63 | sp += API_SIG_MAGLEN; |
| 64 | } |
| 65 | |
| 66 | *sig = NULL; |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | /**************************************** |
| 71 | * |
| 72 | * console |
| 73 | * |
| 74 | ****************************************/ |
| 75 | |
| 76 | int ub_getc(void) |
| 77 | { |
| 78 | int c; |
| 79 | |
Stanislav Galabov | 78757d5 | 2016-02-17 15:23:31 +0200 | [diff] [blame] | 80 | if (!syscall(API_GETC, NULL, &c)) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 81 | return -1; |
| 82 | |
| 83 | return c; |
| 84 | } |
| 85 | |
| 86 | int ub_tstc(void) |
| 87 | { |
| 88 | int t; |
| 89 | |
Stanislav Galabov | 78757d5 | 2016-02-17 15:23:31 +0200 | [diff] [blame] | 90 | if (!syscall(API_TSTC, NULL, &t)) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 91 | return -1; |
| 92 | |
| 93 | return t; |
| 94 | } |
| 95 | |
| 96 | void ub_putc(char c) |
| 97 | { |
Stanislav Galabov | 78757d5 | 2016-02-17 15:23:31 +0200 | [diff] [blame] | 98 | syscall(API_PUTC, NULL, &c); |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | void ub_puts(const char *s) |
| 102 | { |
Stanislav Galabov | 78757d5 | 2016-02-17 15:23:31 +0200 | [diff] [blame] | 103 | syscall(API_PUTS, NULL, s); |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 104 | } |
| 105 | |
| 106 | /**************************************** |
| 107 | * |
| 108 | * system |
| 109 | * |
| 110 | ****************************************/ |
| 111 | |
| 112 | void ub_reset(void) |
| 113 | { |
| 114 | syscall(API_RESET, NULL); |
| 115 | } |
| 116 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 117 | static struct mem_region mr[UB_MAX_MR]; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 118 | static struct sys_info si; |
| 119 | |
| 120 | struct sys_info * ub_get_sys_info(void) |
| 121 | { |
| 122 | int err = 0; |
| 123 | |
| 124 | memset(&si, 0, sizeof(struct sys_info)); |
| 125 | si.mr = mr; |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 126 | si.mr_no = UB_MAX_MR; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 127 | memset(&mr, 0, sizeof(mr)); |
| 128 | |
Stanislav Galabov | 78757d5 | 2016-02-17 15:23:31 +0200 | [diff] [blame] | 129 | if (!syscall(API_GET_SYS_INFO, &err, &si)) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 130 | return NULL; |
| 131 | |
| 132 | return ((err) ? NULL : &si); |
| 133 | } |
| 134 | |
| 135 | /**************************************** |
| 136 | * |
| 137 | * timing |
| 138 | * |
| 139 | ****************************************/ |
Wolfgang Denk | d3a6532 | 2008-01-10 00:55:14 +0100 | [diff] [blame] | 140 | |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 141 | void ub_udelay(unsigned long usec) |
| 142 | { |
| 143 | syscall(API_UDELAY, NULL, &usec); |
| 144 | } |
| 145 | |
| 146 | unsigned long ub_get_timer(unsigned long base) |
| 147 | { |
| 148 | unsigned long cur; |
| 149 | |
| 150 | if (!syscall(API_GET_TIMER, NULL, &cur, &base)) |
| 151 | return 0; |
| 152 | |
| 153 | return cur; |
| 154 | } |
| 155 | |
| 156 | |
| 157 | /**************************************************************************** |
| 158 | * |
| 159 | * devices |
| 160 | * |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 161 | * Devices are identified by handles: numbers 0, 1, 2, ..., UB_MAX_DEV-1 |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 162 | * |
| 163 | ***************************************************************************/ |
| 164 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 165 | static struct device_info devices[UB_MAX_DEV]; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 166 | |
| 167 | struct device_info * ub_dev_get(int i) |
| 168 | { |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 169 | return ((i < 0 || i >= UB_MAX_DEV) ? NULL : &devices[i]); |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 170 | } |
| 171 | |
| 172 | /* |
| 173 | * Enumerates the devices: fills out device_info elements in the devices[] |
| 174 | * array. |
| 175 | * |
| 176 | * returns: number of devices found |
| 177 | */ |
| 178 | int ub_dev_enum(void) |
| 179 | { |
| 180 | struct device_info *di; |
| 181 | int n = 0; |
| 182 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 183 | memset(&devices, 0, sizeof(struct device_info) * UB_MAX_DEV); |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 184 | di = &devices[0]; |
| 185 | |
| 186 | if (!syscall(API_DEV_ENUM, NULL, di)) |
| 187 | return 0; |
| 188 | |
| 189 | while (di->cookie != NULL) { |
| 190 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 191 | if (++n >= UB_MAX_DEV) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 192 | break; |
| 193 | |
| 194 | /* take another device_info */ |
| 195 | di++; |
| 196 | |
| 197 | /* pass on the previous cookie */ |
| 198 | di->cookie = devices[n - 1].cookie; |
| 199 | |
| 200 | if (!syscall(API_DEV_ENUM, NULL, di)) |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | return n; |
| 205 | } |
| 206 | |
| 207 | /* |
| 208 | * handle: 0-based id of the device |
| 209 | * |
| 210 | * returns: 0 when OK, err otherwise |
| 211 | */ |
| 212 | int ub_dev_open(int handle) |
| 213 | { |
| 214 | struct device_info *di; |
| 215 | int err = 0; |
| 216 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 217 | if (handle < 0 || handle >= UB_MAX_DEV) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 218 | return API_EINVAL; |
| 219 | |
| 220 | di = &devices[handle]; |
| 221 | |
| 222 | if (!syscall(API_DEV_OPEN, &err, di)) |
| 223 | return -1; |
| 224 | |
| 225 | return err; |
| 226 | } |
| 227 | |
| 228 | int ub_dev_close(int handle) |
| 229 | { |
| 230 | struct device_info *di; |
| 231 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 232 | if (handle < 0 || handle >= UB_MAX_DEV) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 233 | return API_EINVAL; |
| 234 | |
| 235 | di = &devices[handle]; |
| 236 | if (!syscall(API_DEV_CLOSE, NULL, di)) |
| 237 | return -1; |
| 238 | |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | /* |
| 243 | * |
| 244 | * Validates device for read/write, it has to: |
| 245 | * |
| 246 | * - have sane handle |
| 247 | * - be opened |
| 248 | * |
| 249 | * returns: 0/1 accordingly |
| 250 | */ |
| 251 | static int dev_valid(int handle) |
| 252 | { |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 253 | if (handle < 0 || handle >= UB_MAX_DEV) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 254 | return 0; |
| 255 | |
| 256 | if (devices[handle].state != DEV_STA_OPEN) |
| 257 | return 0; |
| 258 | |
| 259 | return 1; |
| 260 | } |
| 261 | |
| 262 | static int dev_stor_valid(int handle) |
| 263 | { |
| 264 | if (!dev_valid(handle)) |
| 265 | return 0; |
| 266 | |
| 267 | if (!(devices[handle].type & DEV_TYP_STOR)) |
| 268 | return 0; |
| 269 | |
| 270 | return 1; |
| 271 | } |
| 272 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 273 | int ub_dev_read(int handle, void *buf, lbasize_t len, lbastart_t start, |
| 274 | lbasize_t *rlen) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 275 | { |
| 276 | struct device_info *di; |
| 277 | lbasize_t act_len; |
| 278 | int err = 0; |
| 279 | |
| 280 | if (!dev_stor_valid(handle)) |
| 281 | return API_ENODEV; |
| 282 | |
| 283 | di = &devices[handle]; |
| 284 | if (!syscall(API_DEV_READ, &err, di, buf, &len, &start, &act_len)) |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 285 | return API_ESYSC; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 286 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 287 | if (!err && rlen) |
| 288 | *rlen = act_len; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 289 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 290 | return err; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | static int dev_net_valid(int handle) |
| 294 | { |
| 295 | if (!dev_valid(handle)) |
| 296 | return 0; |
| 297 | |
| 298 | if (devices[handle].type != DEV_TYP_NET) |
| 299 | return 0; |
| 300 | |
| 301 | return 1; |
| 302 | } |
| 303 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 304 | int ub_dev_recv(int handle, void *buf, int len, int *rlen) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 305 | { |
| 306 | struct device_info *di; |
| 307 | int err = 0, act_len; |
| 308 | |
| 309 | if (!dev_net_valid(handle)) |
| 310 | return API_ENODEV; |
| 311 | |
| 312 | di = &devices[handle]; |
| 313 | if (!syscall(API_DEV_READ, &err, di, buf, &len, &act_len)) |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 314 | return API_ESYSC; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 315 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 316 | if (!err && rlen) |
| 317 | *rlen = act_len; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 318 | |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 319 | return (err); |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | int ub_dev_send(int handle, void *buf, int len) |
| 323 | { |
| 324 | struct device_info *di; |
| 325 | int err = 0; |
| 326 | |
| 327 | if (!dev_net_valid(handle)) |
| 328 | return API_ENODEV; |
| 329 | |
| 330 | di = &devices[handle]; |
| 331 | if (!syscall(API_DEV_WRITE, &err, di, buf, &len)) |
Rafal Jaworowski | 923aa48 | 2009-01-23 13:27:18 +0100 | [diff] [blame] | 332 | return API_ESYSC; |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 333 | |
| 334 | return err; |
| 335 | } |
| 336 | |
| 337 | /**************************************** |
| 338 | * |
| 339 | * env vars |
| 340 | * |
| 341 | ****************************************/ |
| 342 | |
| 343 | char * ub_env_get(const char *name) |
| 344 | { |
| 345 | char *value; |
| 346 | |
Stanislav Galabov | 78757d5 | 2016-02-17 15:23:31 +0200 | [diff] [blame] | 347 | if (!syscall(API_ENV_GET, NULL, name, &value)) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 348 | return NULL; |
| 349 | |
| 350 | return value; |
| 351 | } |
| 352 | |
| 353 | void ub_env_set(const char *name, char *value) |
| 354 | { |
Stanislav Galabov | 78757d5 | 2016-02-17 15:23:31 +0200 | [diff] [blame] | 355 | syscall(API_ENV_SET, NULL, name, value); |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 356 | } |
| 357 | |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 358 | static char env_name[256]; |
| 359 | |
| 360 | const char * ub_env_enum(const char *last) |
| 361 | { |
| 362 | const char *env, *str; |
| 363 | int i; |
| 364 | |
| 365 | env = NULL; |
| 366 | |
| 367 | /* |
| 368 | * It's OK to pass only the name piece as last (and not the whole |
| 369 | * 'name=val' string), since the API_ENUM_ENV call uses envmatch() |
| 370 | * internally, which handles such case |
| 371 | */ |
Stanislav Galabov | 78757d5 | 2016-02-17 15:23:31 +0200 | [diff] [blame] | 372 | if (!syscall(API_ENV_ENUM, NULL, last, &env)) |
Rafal Jaworowski | 500856e | 2008-01-09 19:39:36 +0100 | [diff] [blame] | 373 | return NULL; |
| 374 | |
| 375 | if (!env) |
| 376 | /* no more env. variables to enumerate */ |
| 377 | return NULL; |
| 378 | |
| 379 | /* next enumerated env var */ |
| 380 | memset(env_name, 0, 256); |
| 381 | for (i = 0, str = env; *str != '=' && *str != '\0';) |
| 382 | env_name[i++] = *str++; |
| 383 | |
| 384 | env_name[i] = '\0'; |
| 385 | |
| 386 | return env_name; |
| 387 | } |
Che-Liang Chiou | a2a5729 | 2011-10-20 23:04:22 +0000 | [diff] [blame] | 388 | |
| 389 | /**************************************** |
| 390 | * |
| 391 | * display |
| 392 | * |
| 393 | ****************************************/ |
| 394 | |
| 395 | int ub_display_get_info(int type, struct display_info *di) |
| 396 | { |
| 397 | int err = 0; |
| 398 | |
Stanislav Galabov | 78757d5 | 2016-02-17 15:23:31 +0200 | [diff] [blame] | 399 | if (!syscall(API_DISPLAY_GET_INFO, &err, type, di)) |
Che-Liang Chiou | a2a5729 | 2011-10-20 23:04:22 +0000 | [diff] [blame] | 400 | return API_ESYSC; |
| 401 | |
| 402 | return err; |
| 403 | } |
| 404 | |
| 405 | int ub_display_draw_bitmap(ulong bitmap, int x, int y) |
| 406 | { |
| 407 | int err = 0; |
| 408 | |
| 409 | if (!syscall(API_DISPLAY_DRAW_BITMAP, &err, bitmap, x, y)) |
| 410 | return API_ESYSC; |
| 411 | |
| 412 | return err; |
| 413 | } |
| 414 | |
| 415 | void ub_display_clear(void) |
| 416 | { |
| 417 | syscall(API_DISPLAY_CLEAR, NULL); |
| 418 | } |
Rob Clark | 7e3e205 | 2017-09-09 06:47:43 -0400 | [diff] [blame^] | 419 | |
| 420 | __weak void *memcpy(void *dest, const void *src, size_t size) |
| 421 | { |
| 422 | unsigned char *dptr = dest; |
| 423 | const unsigned char *ptr = src; |
| 424 | const unsigned char *end = src + size; |
| 425 | |
| 426 | while (ptr < end) |
| 427 | *dptr++ = *ptr++; |
| 428 | |
| 429 | return dest; |
| 430 | } |