~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/powerpc/platforms/ps3/os-area.c

Version: ~ [ linux-4.18-rc5 ] ~ [ linux-4.17.6 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.55 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.112 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.140 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.115 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.57 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.27.62 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  *  PS3 flash memory os area.
  3  *
  4  *  Copyright (C) 2006 Sony Computer Entertainment Inc.
  5  *  Copyright 2006 Sony Corp.
  6  *
  7  *  This program is free software; you can redistribute it and/or modify
  8  *  it under the terms of the GNU General Public License as published by
  9  *  the Free Software Foundation; version 2 of the License.
 10  *
 11  *  This program is distributed in the hope that it will be useful,
 12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  *  GNU General Public License for more details.
 15  *
 16  *  You should have received a copy of the GNU General Public License
 17  *  along with this program; if not, write to the Free Software
 18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 19  */
 20 
 21 #include <linux/kernel.h>
 22 #include <linux/io.h>
 23 #include <linux/workqueue.h>
 24 #include <linux/fs.h>
 25 #include <linux/syscalls.h>
 26 #include <linux/export.h>
 27 #include <linux/ctype.h>
 28 #include <linux/memblock.h>
 29 #include <linux/of.h>
 30 #include <linux/slab.h>
 31 
 32 #include <asm/prom.h>
 33 
 34 #include "platform.h"
 35 
 36 enum {
 37         OS_AREA_SEGMENT_SIZE = 0X200,
 38 };
 39 
 40 enum os_area_ldr_format {
 41         HEADER_LDR_FORMAT_RAW = 0,
 42         HEADER_LDR_FORMAT_GZIP = 1,
 43 };
 44 
 45 #define OS_AREA_HEADER_MAGIC_NUM "cell_ext_os_area"
 46 
 47 /**
 48  * struct os_area_header - os area header segment.
 49  * @magic_num: Always 'cell_ext_os_area'.
 50  * @hdr_version: Header format version number.
 51  * @db_area_offset: Starting segment number of other os database area.
 52  * @ldr_area_offset: Starting segment number of bootloader image area.
 53  * @ldr_format: HEADER_LDR_FORMAT flag.
 54  * @ldr_size: Size of bootloader image in bytes.
 55  *
 56  * Note that the docs refer to area offsets.  These are offsets in units of
 57  * segments from the start of the os area (top of the header).  These are
 58  * better thought of as segment numbers.  The os area of the os area is
 59  * reserved for the os image.
 60  */
 61 
 62 struct os_area_header {
 63         u8 magic_num[16];
 64         u32 hdr_version;
 65         u32 db_area_offset;
 66         u32 ldr_area_offset;
 67         u32 _reserved_1;
 68         u32 ldr_format;
 69         u32 ldr_size;
 70         u32 _reserved_2[6];
 71 };
 72 
 73 enum os_area_boot_flag {
 74         PARAM_BOOT_FLAG_GAME_OS = 0,
 75         PARAM_BOOT_FLAG_OTHER_OS = 1,
 76 };
 77 
 78 enum os_area_ctrl_button {
 79         PARAM_CTRL_BUTTON_O_IS_YES = 0,
 80         PARAM_CTRL_BUTTON_X_IS_YES = 1,
 81 };
 82 
 83 /**
 84  * struct os_area_params - os area params segment.
 85  * @boot_flag: User preference of operating system, PARAM_BOOT_FLAG flag.
 86  * @num_params: Number of params in this (params) segment.
 87  * @rtc_diff: Difference in seconds between 1970 and the ps3 rtc value.
 88  * @av_multi_out: User preference of AV output, PARAM_AV_MULTI_OUT flag.
 89  * @ctrl_button: User preference of controller button config, PARAM_CTRL_BUTTON
 90  *      flag.
 91  * @static_ip_addr: User preference of static IP address.
 92  * @network_mask: User preference of static network mask.
 93  * @default_gateway: User preference of static default gateway.
 94  * @dns_primary: User preference of static primary dns server.
 95  * @dns_secondary: User preference of static secondary dns server.
 96  *
 97  * The ps3 rtc maintains a read-only value that approximates seconds since
 98  * 2000-01-01 00:00:00 UTC.
 99  *
100  * User preference of zero for static_ip_addr means use dhcp.
101  */
102 
103 struct os_area_params {
104         u32 boot_flag;
105         u32 _reserved_1[3];
106         u32 num_params;
107         u32 _reserved_2[3];
108         /* param 0 */
109         s64 rtc_diff;
110         u8 av_multi_out;
111         u8 ctrl_button;
112         u8 _reserved_3[6];
113         /* param 1 */
114         u8 static_ip_addr[4];
115         u8 network_mask[4];
116         u8 default_gateway[4];
117         u8 _reserved_4[4];
118         /* param 2 */
119         u8 dns_primary[4];
120         u8 dns_secondary[4];
121         u8 _reserved_5[8];
122 };
123 
124 #define OS_AREA_DB_MAGIC_NUM "-db-"
125 
126 /**
127  * struct os_area_db - Shared flash memory database.
128  * @magic_num: Always '-db-'.
129  * @version: os_area_db format version number.
130  * @index_64: byte offset of the database id index for 64 bit variables.
131  * @count_64: number of usable 64 bit index entries
132  * @index_32: byte offset of the database id index for 32 bit variables.
133  * @count_32: number of usable 32 bit index entries
134  * @index_16: byte offset of the database id index for 16 bit variables.
135  * @count_16: number of usable 16 bit index entries
136  *
137  * Flash rom storage for exclusive use by guests running in the other os lpar.
138  * The current system configuration allocates 1K (two segments) for other os
139  * use.
140  */
141 
142 struct os_area_db {
143         u8 magic_num[4];
144         u16 version;
145         u16 _reserved_1;
146         u16 index_64;
147         u16 count_64;
148         u16 index_32;
149         u16 count_32;
150         u16 index_16;
151         u16 count_16;
152         u32 _reserved_2;
153         u8 _db_data[1000];
154 };
155 
156 /**
157  * enum os_area_db_owner - Data owners.
158  */
159 
160 enum os_area_db_owner {
161         OS_AREA_DB_OWNER_ANY = -1,
162         OS_AREA_DB_OWNER_NONE = 0,
163         OS_AREA_DB_OWNER_PROTOTYPE = 1,
164         OS_AREA_DB_OWNER_LINUX = 2,
165         OS_AREA_DB_OWNER_PETITBOOT = 3,
166         OS_AREA_DB_OWNER_MAX = 32,
167 };
168 
169 enum os_area_db_key {
170         OS_AREA_DB_KEY_ANY = -1,
171         OS_AREA_DB_KEY_NONE = 0,
172         OS_AREA_DB_KEY_RTC_DIFF = 1,
173         OS_AREA_DB_KEY_VIDEO_MODE = 2,
174         OS_AREA_DB_KEY_MAX = 8,
175 };
176 
177 struct os_area_db_id {
178         int owner;
179         int key;
180 };
181 
182 static const struct os_area_db_id os_area_db_id_empty = {
183         .owner = OS_AREA_DB_OWNER_NONE,
184         .key = OS_AREA_DB_KEY_NONE
185 };
186 
187 static const struct os_area_db_id os_area_db_id_any = {
188         .owner = OS_AREA_DB_OWNER_ANY,
189         .key = OS_AREA_DB_KEY_ANY
190 };
191 
192 static const struct os_area_db_id os_area_db_id_rtc_diff = {
193         .owner = OS_AREA_DB_OWNER_LINUX,
194         .key = OS_AREA_DB_KEY_RTC_DIFF
195 };
196 
197 #define SECONDS_FROM_1970_TO_2000 946684800LL
198 
199 /**
200  * struct saved_params - Static working copies of data from the PS3 'os area'.
201  *
202  * The order of preference we use for the rtc_diff source:
203  *  1) The database value.
204  *  2) The game os value.
205  *  3) The number of seconds from 1970 to 2000.
206  */
207 
208 struct saved_params {
209         unsigned int valid;
210         s64 rtc_diff;
211         unsigned int av_multi_out;
212 } static saved_params;
213 
214 static struct property property_rtc_diff = {
215         .name = "linux,rtc_diff",
216         .length = sizeof(saved_params.rtc_diff),
217         .value = &saved_params.rtc_diff,
218 };
219 
220 static struct property property_av_multi_out = {
221         .name = "linux,av_multi_out",
222         .length = sizeof(saved_params.av_multi_out),
223         .value = &saved_params.av_multi_out,
224 };
225 
226 
227 static DEFINE_MUTEX(os_area_flash_mutex);
228 
229 static const struct ps3_os_area_flash_ops *os_area_flash_ops;
230 
231 void ps3_os_area_flash_register(const struct ps3_os_area_flash_ops *ops)
232 {
233         mutex_lock(&os_area_flash_mutex);
234         os_area_flash_ops = ops;
235         mutex_unlock(&os_area_flash_mutex);
236 }
237 EXPORT_SYMBOL_GPL(ps3_os_area_flash_register);
238 
239 static ssize_t os_area_flash_read(void *buf, size_t count, loff_t pos)
240 {
241         ssize_t res = -ENODEV;
242 
243         mutex_lock(&os_area_flash_mutex);
244         if (os_area_flash_ops)
245                 res = os_area_flash_ops->read(buf, count, pos);
246         mutex_unlock(&os_area_flash_mutex);
247 
248         return res;
249 }
250 
251 static ssize_t os_area_flash_write(const void *buf, size_t count, loff_t pos)
252 {
253         ssize_t res = -ENODEV;
254 
255         mutex_lock(&os_area_flash_mutex);
256         if (os_area_flash_ops)
257                 res = os_area_flash_ops->write(buf, count, pos);
258         mutex_unlock(&os_area_flash_mutex);
259 
260         return res;
261 }
262 
263 
264 /**
265  * os_area_set_property - Add or overwrite a saved_params value to the device tree.
266  *
267  * Overwrites an existing property.
268  */
269 
270 static void os_area_set_property(struct device_node *node,
271         struct property *prop)
272 {
273         int result;
274         struct property *tmp = of_find_property(node, prop->name, NULL);
275 
276         if (tmp) {
277                 pr_debug("%s:%d found %s\n", __func__, __LINE__, prop->name);
278                 of_remove_property(node, tmp);
279         }
280 
281         result = of_add_property(node, prop);
282 
283         if (result)
284                 pr_debug("%s:%d of_set_property failed\n", __func__,
285                         __LINE__);
286 }
287 
288 /**
289  * os_area_get_property - Get a saved_params value from the device tree.
290  *
291  */
292 
293 static void __init os_area_get_property(struct device_node *node,
294         struct property *prop)
295 {
296         const struct property *tmp = of_find_property(node, prop->name, NULL);
297 
298         if (tmp) {
299                 BUG_ON(prop->length != tmp->length);
300                 memcpy(prop->value, tmp->value, prop->length);
301         } else
302                 pr_debug("%s:%d not found %s\n", __func__, __LINE__,
303                         prop->name);
304 }
305 
306 static void dump_field(char *s, const u8 *field, int size_of_field)
307 {
308 #if defined(DEBUG)
309         int i;
310 
311         for (i = 0; i < size_of_field; i++)
312                 s[i] = isprint(field[i]) ? field[i] : '.';
313         s[i] = 0;
314 #endif
315 }
316 
317 #define dump_header(_a) _dump_header(_a, __func__, __LINE__)
318 static void _dump_header(const struct os_area_header *h, const char *func,
319         int line)
320 {
321         char str[sizeof(h->magic_num) + 1];
322 
323         dump_field(str, h->magic_num, sizeof(h->magic_num));
324         pr_debug("%s:%d: h.magic_num:       '%s'\n", func, line,
325                 str);
326         pr_debug("%s:%d: h.hdr_version:     %u\n", func, line,
327                 h->hdr_version);
328         pr_debug("%s:%d: h.db_area_offset:  %u\n", func, line,
329                 h->db_area_offset);
330         pr_debug("%s:%d: h.ldr_area_offset: %u\n", func, line,
331                 h->ldr_area_offset);
332         pr_debug("%s:%d: h.ldr_format:      %u\n", func, line,
333                 h->ldr_format);
334         pr_debug("%s:%d: h.ldr_size:        %xh\n", func, line,
335                 h->ldr_size);
336 }
337 
338 #define dump_params(_a) _dump_params(_a, __func__, __LINE__)
339 static void _dump_params(const struct os_area_params *p, const char *func,
340         int line)
341 {
342         pr_debug("%s:%d: p.boot_flag:       %u\n", func, line, p->boot_flag);
343         pr_debug("%s:%d: p.num_params:      %u\n", func, line, p->num_params);
344         pr_debug("%s:%d: p.rtc_diff         %lld\n", func, line, p->rtc_diff);
345         pr_debug("%s:%d: p.av_multi_out     %u\n", func, line, p->av_multi_out);
346         pr_debug("%s:%d: p.ctrl_button:     %u\n", func, line, p->ctrl_button);
347         pr_debug("%s:%d: p.static_ip_addr:  %u.%u.%u.%u\n", func, line,
348                 p->static_ip_addr[0], p->static_ip_addr[1],
349                 p->static_ip_addr[2], p->static_ip_addr[3]);
350         pr_debug("%s:%d: p.network_mask:    %u.%u.%u.%u\n", func, line,
351                 p->network_mask[0], p->network_mask[1],
352                 p->network_mask[2], p->network_mask[3]);
353         pr_debug("%s:%d: p.default_gateway: %u.%u.%u.%u\n", func, line,
354                 p->default_gateway[0], p->default_gateway[1],
355                 p->default_gateway[2], p->default_gateway[3]);
356         pr_debug("%s:%d: p.dns_primary:     %u.%u.%u.%u\n", func, line,
357                 p->dns_primary[0], p->dns_primary[1],
358                 p->dns_primary[2], p->dns_primary[3]);
359         pr_debug("%s:%d: p.dns_secondary:   %u.%u.%u.%u\n", func, line,
360                 p->dns_secondary[0], p->dns_secondary[1],
361                 p->dns_secondary[2], p->dns_secondary[3]);
362 }
363 
364 static int verify_header(const struct os_area_header *header)
365 {
366         if (memcmp(header->magic_num, OS_AREA_HEADER_MAGIC_NUM,
367                 sizeof(header->magic_num))) {
368                 pr_debug("%s:%d magic_num failed\n", __func__, __LINE__);
369                 return -1;
370         }
371 
372         if (header->hdr_version < 1) {
373                 pr_debug("%s:%d hdr_version failed\n", __func__, __LINE__);
374                 return -1;
375         }
376 
377         if (header->db_area_offset > header->ldr_area_offset) {
378                 pr_debug("%s:%d offsets failed\n", __func__, __LINE__);
379                 return -1;
380         }
381 
382         return 0;
383 }
384 
385 static int db_verify(const struct os_area_db *db)
386 {
387         if (memcmp(db->magic_num, OS_AREA_DB_MAGIC_NUM,
388                 sizeof(db->magic_num))) {
389                 pr_debug("%s:%d magic_num failed\n", __func__, __LINE__);
390                 return -EINVAL;
391         }
392 
393         if (db->version != 1) {
394                 pr_debug("%s:%d version failed\n", __func__, __LINE__);
395                 return -EINVAL;
396         }
397 
398         return 0;
399 }
400 
401 struct db_index {
402        uint8_t owner:5;
403        uint8_t key:3;
404 };
405 
406 struct db_iterator {
407         const struct os_area_db *db;
408         struct os_area_db_id match_id;
409         struct db_index *idx;
410         struct db_index *last_idx;
411         union {
412                 uint64_t *value_64;
413                 uint32_t *value_32;
414                 uint16_t *value_16;
415         };
416 };
417 
418 static unsigned int db_align_up(unsigned int val, unsigned int size)
419 {
420         return (val + (size - 1)) & (~(size - 1));
421 }
422 
423 /**
424  * db_for_each_64 - Iterator for 64 bit entries.
425  *
426  * A NULL value for id can be used to match all entries.
427  * OS_AREA_DB_OWNER_ANY and OS_AREA_DB_KEY_ANY can be used to match all.
428  */
429 
430 static int db_for_each_64(const struct os_area_db *db,
431         const struct os_area_db_id *match_id, struct db_iterator *i)
432 {
433 next:
434         if (!i->db) {
435                 i->db = db;
436                 i->match_id = match_id ? *match_id : os_area_db_id_any;
437                 i->idx = (void *)db + db->index_64;
438                 i->last_idx = i->idx + db->count_64;
439                 i->value_64 = (void *)db + db->index_64
440                         + db_align_up(db->count_64, 8);
441         } else {
442                 i->idx++;
443                 i->value_64++;
444         }
445 
446         if (i->idx >= i->last_idx) {
447                 pr_debug("%s:%d: reached end\n", __func__, __LINE__);
448                 return 0;
449         }
450 
451         if (i->match_id.owner != OS_AREA_DB_OWNER_ANY
452                 && i->match_id.owner != (int)i->idx->owner)
453                 goto next;
454         if (i->match_id.key != OS_AREA_DB_KEY_ANY
455                 && i->match_id.key != (int)i->idx->key)
456                 goto next;
457 
458         return 1;
459 }
460 
461 static int db_delete_64(struct os_area_db *db, const struct os_area_db_id *id)
462 {
463         struct db_iterator i;
464 
465         for (i.db = NULL; db_for_each_64(db, id, &i); ) {
466 
467                 pr_debug("%s:%d: got (%d:%d) %llxh\n", __func__, __LINE__,
468                         i.idx->owner, i.idx->key,
469                         (unsigned long long)*i.value_64);
470 
471                 i.idx->owner = 0;
472                 i.idx->key = 0;
473                 *i.value_64 = 0;
474         }
475         return 0;
476 }
477 
478 static int db_set_64(struct os_area_db *db, const struct os_area_db_id *id,
479         uint64_t value)
480 {
481         struct db_iterator i;
482 
483         pr_debug("%s:%d: (%d:%d) <= %llxh\n", __func__, __LINE__,
484                 id->owner, id->key, (unsigned long long)value);
485 
486         if (!id->owner || id->owner == OS_AREA_DB_OWNER_ANY
487                 || id->key == OS_AREA_DB_KEY_ANY) {
488                 pr_debug("%s:%d: bad id: (%d:%d)\n", __func__,
489                         __LINE__, id->owner, id->key);
490                 return -1;
491         }
492 
493         db_delete_64(db, id);
494 
495         i.db = NULL;
496         if (db_for_each_64(db, &os_area_db_id_empty, &i)) {
497 
498                 pr_debug("%s:%d: got (%d:%d) %llxh\n", __func__, __LINE__,
499                         i.idx->owner, i.idx->key,
500                         (unsigned long long)*i.value_64);
501 
502                 i.idx->owner = id->owner;
503                 i.idx->key = id->key;
504                 *i.value_64 = value;
505 
506                 pr_debug("%s:%d: set (%d:%d) <= %llxh\n", __func__, __LINE__,
507                         i.idx->owner, i.idx->key,
508                         (unsigned long long)*i.value_64);
509                 return 0;
510         }
511         pr_debug("%s:%d: database full.\n",
512                 __func__, __LINE__);
513         return -1;
514 }
515 
516 static int db_get_64(const struct os_area_db *db,
517         const struct os_area_db_id *id, uint64_t *value)
518 {
519         struct db_iterator i;
520 
521         i.db = NULL;
522         if (db_for_each_64(db, id, &i)) {
523                 *value = *i.value_64;
524                 pr_debug("%s:%d: found %lld\n", __func__, __LINE__,
525                                 (long long int)*i.value_64);
526                 return 0;
527         }
528         pr_debug("%s:%d: not found\n", __func__, __LINE__);
529         return -1;
530 }
531 
532 static int db_get_rtc_diff(const struct os_area_db *db, int64_t *rtc_diff)
533 {
534         return db_get_64(db, &os_area_db_id_rtc_diff, (uint64_t*)rtc_diff);
535 }
536 
537 #define dump_db(a) _dump_db(a, __func__, __LINE__)
538 static void _dump_db(const struct os_area_db *db, const char *func,
539         int line)
540 {
541         char str[sizeof(db->magic_num) + 1];
542 
543         dump_field(str, db->magic_num, sizeof(db->magic_num));
544         pr_debug("%s:%d: db.magic_num:      '%s'\n", func, line,
545                 str);
546         pr_debug("%s:%d: db.version:         %u\n", func, line,
547                 db->version);
548         pr_debug("%s:%d: db.index_64:        %u\n", func, line,
549                 db->index_64);
550         pr_debug("%s:%d: db.count_64:        %u\n", func, line,
551                 db->count_64);
552         pr_debug("%s:%d: db.index_32:        %u\n", func, line,
553                 db->index_32);
554         pr_debug("%s:%d: db.count_32:        %u\n", func, line,
555                 db->count_32);
556         pr_debug("%s:%d: db.index_16:        %u\n", func, line,
557                 db->index_16);
558         pr_debug("%s:%d: db.count_16:        %u\n", func, line,
559                 db->count_16);
560 }
561 
562 static void os_area_db_init(struct os_area_db *db)
563 {
564         enum {
565                 HEADER_SIZE = offsetof(struct os_area_db, _db_data),
566                 INDEX_64_COUNT = 64,
567                 VALUES_64_COUNT = 57,
568                 INDEX_32_COUNT = 64,
569                 VALUES_32_COUNT = 57,
570                 INDEX_16_COUNT = 64,
571                 VALUES_16_COUNT = 57,
572         };
573 
574         memset(db, 0, sizeof(struct os_area_db));
575 
576         memcpy(db->magic_num, OS_AREA_DB_MAGIC_NUM, sizeof(db->magic_num));
577         db->version = 1;
578         db->index_64 = HEADER_SIZE;
579         db->count_64 = VALUES_64_COUNT;
580         db->index_32 = HEADER_SIZE
581                         + INDEX_64_COUNT * sizeof(struct db_index)
582                         + VALUES_64_COUNT * sizeof(u64);
583         db->count_32 = VALUES_32_COUNT;
584         db->index_16 = HEADER_SIZE
585                         + INDEX_64_COUNT * sizeof(struct db_index)
586                         + VALUES_64_COUNT * sizeof(u64)
587                         + INDEX_32_COUNT * sizeof(struct db_index)
588                         + VALUES_32_COUNT * sizeof(u32);
589         db->count_16 = VALUES_16_COUNT;
590 
591         /* Rules to check db layout. */
592 
593         BUILD_BUG_ON(sizeof(struct db_index) != 1);
594         BUILD_BUG_ON(sizeof(struct os_area_db) != 2 * OS_AREA_SEGMENT_SIZE);
595         BUILD_BUG_ON(INDEX_64_COUNT & 0x7);
596         BUILD_BUG_ON(VALUES_64_COUNT > INDEX_64_COUNT);
597         BUILD_BUG_ON(INDEX_32_COUNT & 0x7);
598         BUILD_BUG_ON(VALUES_32_COUNT > INDEX_32_COUNT);
599         BUILD_BUG_ON(INDEX_16_COUNT & 0x7);
600         BUILD_BUG_ON(VALUES_16_COUNT > INDEX_16_COUNT);
601         BUILD_BUG_ON(HEADER_SIZE
602                         + INDEX_64_COUNT * sizeof(struct db_index)
603                         + VALUES_64_COUNT * sizeof(u64)
604                         + INDEX_32_COUNT * sizeof(struct db_index)
605                         + VALUES_32_COUNT * sizeof(u32)
606                         + INDEX_16_COUNT * sizeof(struct db_index)
607                         + VALUES_16_COUNT * sizeof(u16)
608                         > sizeof(struct os_area_db));
609 }
610 
611 /**
612  * update_flash_db - Helper for os_area_queue_work_handler.
613  *
614  */
615 
616 static int update_flash_db(void)
617 {
618         const unsigned int buf_len = 8 * OS_AREA_SEGMENT_SIZE;
619         struct os_area_header *header;
620         ssize_t count;
621         int error;
622         loff_t pos;
623         struct os_area_db* db;
624 
625         /* Read in header and db from flash. */
626 
627         header = kmalloc(buf_len, GFP_KERNEL);
628         if (!header) {
629                 pr_debug("%s: kmalloc failed\n", __func__);
630                 return -ENOMEM;
631         }
632 
633         count = os_area_flash_read(header, buf_len, 0);
634         if (count < 0) {
635                 pr_debug("%s: os_area_flash_read failed %zd\n", __func__,
636                          count);
637                 error = count;
638                 goto fail;
639         }
640 
641         pos = header->db_area_offset * OS_AREA_SEGMENT_SIZE;
642         if (count < OS_AREA_SEGMENT_SIZE || verify_header(header) ||
643             count < pos) {
644                 pr_debug("%s: verify_header failed\n", __func__);
645                 dump_header(header);
646                 error = -EINVAL;
647                 goto fail;
648         }
649 
650         /* Now got a good db offset and some maybe good db data. */
651 
652         db = (void *)header + pos;
653 
654         error = db_verify(db);
655         if (error) {
656                 pr_notice("%s: Verify of flash database failed, formatting.\n",
657                           __func__);
658                 dump_db(db);
659                 os_area_db_init(db);
660         }
661 
662         /* Now got good db data. */
663 
664         db_set_64(db, &os_area_db_id_rtc_diff, saved_params.rtc_diff);
665 
666         count = os_area_flash_write(db, sizeof(struct os_area_db), pos);
667         if (count < sizeof(struct os_area_db)) {
668                 pr_debug("%s: os_area_flash_write failed %zd\n", __func__,
669                          count);
670                 error = count < 0 ? count : -EIO;
671         }
672 
673 fail:
674         kfree(header);
675         return error;
676 }
677 
678 /**
679  * os_area_queue_work_handler - Asynchronous write handler.
680  *
681  * An asynchronous write for flash memory and the device tree.  Do not
682  * call directly, use os_area_queue_work().
683  */
684 
685 static void os_area_queue_work_handler(struct work_struct *work)
686 {
687         struct device_node *node;
688         int error;
689 
690         pr_debug(" -> %s:%d\n", __func__, __LINE__);
691 
692         node = of_find_node_by_path("/");
693         if (node) {
694                 os_area_set_property(node, &property_rtc_diff);
695                 of_node_put(node);
696         } else
697                 pr_debug("%s:%d of_find_node_by_path failed\n",
698                         __func__, __LINE__);
699 
700         error = update_flash_db();
701         if (error)
702                 pr_warn("%s: Could not update FLASH ROM\n", __func__);
703 
704         pr_debug(" <- %s:%d\n", __func__, __LINE__);
705 }
706 
707 static void os_area_queue_work(void)
708 {
709         static DECLARE_WORK(q, os_area_queue_work_handler);
710 
711         wmb();
712         schedule_work(&q);
713 }
714 
715 /**
716  * ps3_os_area_save_params - Copy data from os area mirror to @saved_params.
717  *
718  * For the convenience of the guest the HV makes a copy of the os area in
719  * flash to a high address in the boot memory region and then puts that RAM
720  * address and the byte count into the repository for retrieval by the guest.
721  * We copy the data we want into a static variable and allow the memory setup
722  * by the HV to be claimed by the memblock manager.
723  *
724  * The os area mirror will not be available to a second stage kernel, and
725  * the header verify will fail.  In this case, the saved_params values will
726  * be set from flash memory or the passed in device tree in ps3_os_area_init().
727  */
728 
729 void __init ps3_os_area_save_params(void)
730 {
731         int result;
732         u64 lpar_addr;
733         unsigned int size;
734         struct os_area_header *header;
735         struct os_area_params *params;
736         struct os_area_db *db;
737 
738         pr_debug(" -> %s:%d\n", __func__, __LINE__);
739 
740         result = ps3_repository_read_boot_dat_info(&lpar_addr, &size);
741 
742         if (result) {
743                 pr_debug("%s:%d ps3_repository_read_boot_dat_info failed\n",
744                         __func__, __LINE__);
745                 return;
746         }
747 
748         header = (struct os_area_header *)__va(lpar_addr);
749         params = (struct os_area_params *)__va(lpar_addr
750                 + OS_AREA_SEGMENT_SIZE);
751 
752         result = verify_header(header);
753 
754         if (result) {
755                 /* Second stage kernels exit here. */
756                 pr_debug("%s:%d verify_header failed\n", __func__, __LINE__);
757                 dump_header(header);
758                 return;
759         }
760 
761         db = (struct os_area_db *)__va(lpar_addr
762                 + header->db_area_offset * OS_AREA_SEGMENT_SIZE);
763 
764         dump_header(header);
765         dump_params(params);
766         dump_db(db);
767 
768         result = db_verify(db) || db_get_rtc_diff(db, &saved_params.rtc_diff);
769         if (result)
770                 saved_params.rtc_diff = params->rtc_diff ? params->rtc_diff
771                         : SECONDS_FROM_1970_TO_2000;
772         saved_params.av_multi_out = params->av_multi_out;
773         saved_params.valid = 1;
774 
775         memset(header, 0, sizeof(*header));
776 
777         pr_debug(" <- %s:%d\n", __func__, __LINE__);
778 }
779 
780 /**
781  * ps3_os_area_init - Setup os area device tree properties as needed.
782  */
783 
784 void __init ps3_os_area_init(void)
785 {
786         struct device_node *node;
787 
788         pr_debug(" -> %s:%d\n", __func__, __LINE__);
789 
790         node = of_find_node_by_path("/");
791 
792         if (!saved_params.valid && node) {
793                 /* Second stage kernels should have a dt entry. */
794                 os_area_get_property(node, &property_rtc_diff);
795                 os_area_get_property(node, &property_av_multi_out);
796         }
797 
798         if(!saved_params.rtc_diff)
799                 saved_params.rtc_diff = SECONDS_FROM_1970_TO_2000;
800 
801         if (node) {
802                 os_area_set_property(node, &property_rtc_diff);
803                 os_area_set_property(node, &property_av_multi_out);
804                 of_node_put(node);
805         } else
806                 pr_debug("%s:%d of_find_node_by_path failed\n",
807                         __func__, __LINE__);
808 
809         pr_debug(" <- %s:%d\n", __func__, __LINE__);
810 }
811 
812 /**
813  * ps3_os_area_get_rtc_diff - Returns the rtc diff value.
814  */
815 
816 u64 ps3_os_area_get_rtc_diff(void)
817 {
818         return saved_params.rtc_diff;
819 }
820 EXPORT_SYMBOL_GPL(ps3_os_area_get_rtc_diff);
821 
822 /**
823  * ps3_os_area_set_rtc_diff - Set the rtc diff value.
824  *
825  * An asynchronous write is needed to support writing updates from
826  * the timer interrupt context.
827  */
828 
829 void ps3_os_area_set_rtc_diff(u64 rtc_diff)
830 {
831         if (saved_params.rtc_diff != rtc_diff) {
832                 saved_params.rtc_diff = rtc_diff;
833                 os_area_queue_work();
834         }
835 }
836 EXPORT_SYMBOL_GPL(ps3_os_area_set_rtc_diff);
837 
838 /**
839  * ps3_os_area_get_av_multi_out - Returns the default video mode.
840  */
841 
842 enum ps3_param_av_multi_out ps3_os_area_get_av_multi_out(void)
843 {
844     return saved_params.av_multi_out;
845 }
846 EXPORT_SYMBOL_GPL(ps3_os_area_get_av_multi_out);
847 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp