| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * PS3 flash memory os area. |
| * |
| * Copyright (C) 2006 Sony Computer Entertainment Inc. |
| * Copyright 2006 Sony Corp. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/io.h> |
| #include <linux/workqueue.h> |
| #include <linux/fs.h> |
| #include <linux/syscalls.h> |
| #include <linux/export.h> |
| #include <linux/ctype.h> |
| #include <linux/memblock.h> |
| #include <linux/of.h> |
| #include <linux/slab.h> |
| |
| #include <asm/prom.h> |
| |
| #include "platform.h" |
| |
| enum { |
| OS_AREA_SEGMENT_SIZE = 0X200, |
| }; |
| |
| enum os_area_ldr_format { |
| HEADER_LDR_FORMAT_RAW = 0, |
| HEADER_LDR_FORMAT_GZIP = 1, |
| }; |
| |
| #define OS_AREA_HEADER_MAGIC_NUM "cell_ext_os_area" |
| |
| /** |
| * struct os_area_header - os area header segment. |
| * @magic_num: Always 'cell_ext_os_area'. |
| * @hdr_version: Header format version number. |
| * @db_area_offset: Starting segment number of other os database area. |
| * @ldr_area_offset: Starting segment number of bootloader image area. |
| * @ldr_format: HEADER_LDR_FORMAT flag. |
| * @ldr_size: Size of bootloader image in bytes. |
| * |
| * Note that the docs refer to area offsets. These are offsets in units of |
| * segments from the start of the os area (top of the header). These are |
| * better thought of as segment numbers. The os area of the os area is |
| * reserved for the os image. |
| */ |
| |
| struct os_area_header { |
| u8 magic_num[16]; |
| u32 hdr_version; |
| u32 db_area_offset; |
| u32 ldr_area_offset; |
| u32 _reserved_1; |
| u32 ldr_format; |
| u32 ldr_size; |
| u32 _reserved_2[6]; |
| }; |
| |
| enum os_area_boot_flag { |
| PARAM_BOOT_FLAG_GAME_OS = 0, |
| PARAM_BOOT_FLAG_OTHER_OS = 1, |
| }; |
| |
| enum os_area_ctrl_button { |
| PARAM_CTRL_BUTTON_O_IS_YES = 0, |
| PARAM_CTRL_BUTTON_X_IS_YES = 1, |
| }; |
| |
| /** |
| * struct os_area_params - os area params segment. |
| * @boot_flag: User preference of operating system, PARAM_BOOT_FLAG flag. |
| * @num_params: Number of params in this (params) segment. |
| * @rtc_diff: Difference in seconds between 1970 and the ps3 rtc value. |
| * @av_multi_out: User preference of AV output, PARAM_AV_MULTI_OUT flag. |
| * @ctrl_button: User preference of controller button config, PARAM_CTRL_BUTTON |
| * flag. |
| * @static_ip_addr: User preference of static IP address. |
| * @network_mask: User preference of static network mask. |
| * @default_gateway: User preference of static default gateway. |
| * @dns_primary: User preference of static primary dns server. |
| * @dns_secondary: User preference of static secondary dns server. |
| * |
| * The ps3 rtc maintains a read-only value that approximates seconds since |
| * 2000-01-01 00:00:00 UTC. |
| * |
| * User preference of zero for static_ip_addr means use dhcp. |
| */ |
| |
| struct os_area_params { |
| u32 boot_flag; |
| u32 _reserved_1[3]; |
| u32 num_params; |
| u32 _reserved_2[3]; |
| /* param 0 */ |
| s64 rtc_diff; |
| u8 av_multi_out; |
| u8 ctrl_button; |
| u8 _reserved_3[6]; |
| /* param 1 */ |
| u8 static_ip_addr[4]; |
| u8 network_mask[4]; |
| u8 default_gateway[4]; |
| u8 _reserved_4[4]; |
| /* param 2 */ |
| u8 dns_primary[4]; |
| u8 dns_secondary[4]; |
| u8 _reserved_5[8]; |
| }; |
| |
| #define OS_AREA_DB_MAGIC_NUM "-db-" |
| |
| /** |
| * struct os_area_db - Shared flash memory database. |
| * @magic_num: Always '-db-'. |
| * @version: os_area_db format version number. |
| * @index_64: byte offset of the database id index for 64 bit variables. |
| * @count_64: number of usable 64 bit index entries |
| * @index_32: byte offset of the database id index for 32 bit variables. |
| * @count_32: number of usable 32 bit index entries |
| * @index_16: byte offset of the database id index for 16 bit variables. |
| * @count_16: number of usable 16 bit index entries |
| * |
| * Flash rom storage for exclusive use by guests running in the other os lpar. |
| * The current system configuration allocates 1K (two segments) for other os |
| * use. |
| */ |
| |
| struct os_area_db { |
| u8 magic_num[4]; |
| u16 version; |
| u16 _reserved_1; |
| u16 index_64; |
| u16 count_64; |
| u16 index_32; |
| u16 count_32; |
| u16 index_16; |
| u16 count_16; |
| u32 _reserved_2; |
| u8 _db_data[1000]; |
| }; |
| |
| /** |
| * enum os_area_db_owner - Data owners. |
| */ |
| |
| enum os_area_db_owner { |
| OS_AREA_DB_OWNER_ANY = -1, |
| OS_AREA_DB_OWNER_NONE = 0, |
| OS_AREA_DB_OWNER_PROTOTYPE = 1, |
| OS_AREA_DB_OWNER_LINUX = 2, |
| OS_AREA_DB_OWNER_PETITBOOT = 3, |
| OS_AREA_DB_OWNER_MAX = 32, |
| }; |
| |
| enum os_area_db_key { |
| OS_AREA_DB_KEY_ANY = -1, |
| OS_AREA_DB_KEY_NONE = 0, |
| OS_AREA_DB_KEY_RTC_DIFF = 1, |
| OS_AREA_DB_KEY_VIDEO_MODE = 2, |
| OS_AREA_DB_KEY_MAX = 8, |
| }; |
| |
| struct os_area_db_id { |
| int owner; |
| int key; |
| }; |
| |
| static const struct os_area_db_id os_area_db_id_empty = { |
| .owner = OS_AREA_DB_OWNER_NONE, |
| .key = OS_AREA_DB_KEY_NONE |
| }; |
| |
| static const struct os_area_db_id os_area_db_id_any = { |
| .owner = OS_AREA_DB_OWNER_ANY, |
| .key = OS_AREA_DB_KEY_ANY |
| }; |
| |
| static const struct os_area_db_id os_area_db_id_rtc_diff = { |
| .owner = OS_AREA_DB_OWNER_LINUX, |
| .key = OS_AREA_DB_KEY_RTC_DIFF |
| }; |
| |
| #define SECONDS_FROM_1970_TO_2000 946684800LL |
| |
| /** |
| * struct saved_params - Static working copies of data from the PS3 'os area'. |
| * |
| * The order of preference we use for the rtc_diff source: |
| * 1) The database value. |
| * 2) The game os value. |
| * 3) The number of seconds from 1970 to 2000. |
| */ |
| |
| static struct saved_params { |
| unsigned int valid; |
| s64 rtc_diff; |
| unsigned int av_multi_out; |
| } saved_params; |
| |
| static struct property property_rtc_diff = { |
| .name = "linux,rtc_diff", |
| .length = sizeof(saved_params.rtc_diff), |
| .value = &saved_params.rtc_diff, |
| }; |
| |
| static struct property property_av_multi_out = { |
| .name = "linux,av_multi_out", |
| .length = sizeof(saved_params.av_multi_out), |
| .value = &saved_params.av_multi_out, |
| }; |
| |
| |
| static DEFINE_MUTEX(os_area_flash_mutex); |
| |
| static const struct ps3_os_area_flash_ops *os_area_flash_ops; |
| |
| void ps3_os_area_flash_register(const struct ps3_os_area_flash_ops *ops) |
| { |
| mutex_lock(&os_area_flash_mutex); |
| os_area_flash_ops = ops; |
| mutex_unlock(&os_area_flash_mutex); |
| } |
| EXPORT_SYMBOL_GPL(ps3_os_area_flash_register); |
| |
| static ssize_t os_area_flash_read(void *buf, size_t count, loff_t pos) |
| { |
| ssize_t res = -ENODEV; |
| |
| mutex_lock(&os_area_flash_mutex); |
| if (os_area_flash_ops) |
| res = os_area_flash_ops->read(buf, count, pos); |
| mutex_unlock(&os_area_flash_mutex); |
| |
| return res; |
| } |
| |
| static ssize_t os_area_flash_write(const void *buf, size_t count, loff_t pos) |
| { |
| ssize_t res = -ENODEV; |
| |
| mutex_lock(&os_area_flash_mutex); |
| if (os_area_flash_ops) |
| res = os_area_flash_ops->write(buf, count, pos); |
| mutex_unlock(&os_area_flash_mutex); |
| |
| return res; |
| } |
| |
| |
| /** |
| * os_area_set_property - Add or overwrite a saved_params value to the device tree. |
| * |
| * Overwrites an existing property. |
| */ |
| |
| static void os_area_set_property(struct device_node *node, |
| struct property *prop) |
| { |
| int result; |
| struct property *tmp = of_find_property(node, prop->name, NULL); |
| |
| if (tmp) { |
| pr_debug("%s:%d found %s\n", __func__, __LINE__, prop->name); |
| of_remove_property(node, tmp); |
| } |
| |
| result = of_add_property(node, prop); |
| |
| if (result) |
| pr_debug("%s:%d of_set_property failed\n", __func__, |
| __LINE__); |
| } |
| |
| /** |
| * os_area_get_property - Get a saved_params value from the device tree. |
| * |
| */ |
| |
| static void __init os_area_get_property(struct device_node *node, |
| struct property *prop) |
| { |
| const struct property *tmp = of_find_property(node, prop->name, NULL); |
| |
| if (tmp) { |
| BUG_ON(prop->length != tmp->length); |
| memcpy(prop->value, tmp->value, prop->length); |
| } else |
| pr_debug("%s:%d not found %s\n", __func__, __LINE__, |
| prop->name); |
| } |
| |
| static void dump_field(char *s, const u8 *field, int size_of_field) |
| { |
| #if defined(DEBUG) |
| int i; |
| |
| for (i = 0; i < size_of_field; i++) |
| s[i] = isprint(field[i]) ? field[i] : '.'; |
| s[i] = 0; |
| #endif |
| } |
| |
| #define dump_header(_a) _dump_header(_a, __func__, __LINE__) |
| static void _dump_header(const struct os_area_header *h, const char *func, |
| int line) |
| { |
| char str[sizeof(h->magic_num) + 1]; |
| |
| dump_field(str, h->magic_num, sizeof(h->magic_num)); |
| pr_debug("%s:%d: h.magic_num: '%s'\n", func, line, |
| str); |
| pr_debug("%s:%d: h.hdr_version: %u\n", func, line, |
| h->hdr_version); |
| pr_debug("%s:%d: h.db_area_offset: %u\n", func, line, |
| h->db_area_offset); |
| pr_debug("%s:%d: h.ldr_area_offset: %u\n", func, line, |
| h->ldr_area_offset); |
| pr_debug("%s:%d: h.ldr_format: %u\n", func, line, |
| h->ldr_format); |
| pr_debug("%s:%d: h.ldr_size: %xh\n", func, line, |
| h->ldr_size); |
| } |
| |
| #define dump_params(_a) _dump_params(_a, __func__, __LINE__) |
| static void _dump_params(const struct os_area_params *p, const char *func, |
| int line) |
| { |
| pr_debug("%s:%d: p.boot_flag: %u\n", func, line, p->boot_flag); |
| pr_debug("%s:%d: p.num_params: %u\n", func, line, p->num_params); |
| pr_debug("%s:%d: p.rtc_diff %lld\n", func, line, p->rtc_diff); |
| pr_debug("%s:%d: p.av_multi_out %u\n", func, line, p->av_multi_out); |
| pr_debug("%s:%d: p.ctrl_button: %u\n", func, line, p->ctrl_button); |
| pr_debug("%s:%d: p.static_ip_addr: %u.%u.%u.%u\n", func, line, |
| p->static_ip_addr[0], p->static_ip_addr[1], |
| p->static_ip_addr[2], p->static_ip_addr[3]); |
| pr_debug("%s:%d: p.network_mask: %u.%u.%u.%u\n", func, line, |
| p->network_mask[0], p->network_mask[1], |
| p->network_mask[2], p->network_mask[3]); |
| pr_debug("%s:%d: p.default_gateway: %u.%u.%u.%u\n", func, line, |
| p->default_gateway[0], p->default_gateway[1], |
| p->default_gateway[2], p->default_gateway[3]); |
| pr_debug("%s:%d: p.dns_primary: %u.%u.%u.%u\n", func, line, |
| p->dns_primary[0], p->dns_primary[1], |
| p->dns_primary[2], p->dns_primary[3]); |
| pr_debug("%s:%d: p.dns_secondary: %u.%u.%u.%u\n", func, line, |
| p->dns_secondary[0], p->dns_secondary[1], |
| p->dns_secondary[2], p->dns_secondary[3]); |
| } |
| |
| static int verify_header(const struct os_area_header *header) |
| { |
| if (memcmp(header->magic_num, OS_AREA_HEADER_MAGIC_NUM, |
| sizeof(header->magic_num))) { |
| pr_debug("%s:%d magic_num failed\n", __func__, __LINE__); |
| return -1; |
| } |
| |
| if (header->hdr_version < 1) { |
| pr_debug("%s:%d hdr_version failed\n", __func__, __LINE__); |
| return -1; |
| } |
| |
| if (header->db_area_offset > header->ldr_area_offset) { |
| pr_debug("%s:%d offsets failed\n", __func__, __LINE__); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static int db_verify(const struct os_area_db *db) |
| { |
| if (memcmp(db->magic_num, OS_AREA_DB_MAGIC_NUM, |
| sizeof(db->magic_num))) { |
| pr_debug("%s:%d magic_num failed\n", __func__, __LINE__); |
| return -EINVAL; |
| } |
| |
| if (db->version != 1) { |
| pr_debug("%s:%d version failed\n", __func__, __LINE__); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| struct db_index { |
| uint8_t owner:5; |
| uint8_t key:3; |
| }; |
| |
| struct db_iterator { |
| const struct os_area_db *db; |
| struct os_area_db_id match_id; |
| struct db_index *idx; |
| struct db_index *last_idx; |
| union { |
| uint64_t *value_64; |
| uint32_t *value_32; |
| uint16_t *value_16; |
| }; |
| }; |
| |
| static unsigned int db_align_up(unsigned int val, unsigned int size) |
| { |
| return (val + (size - 1)) & (~(size - 1)); |
| } |
| |
| /** |
| * db_for_each_64 - Iterator for 64 bit entries. |
| * |
| * A NULL value for id can be used to match all entries. |
| * OS_AREA_DB_OWNER_ANY and OS_AREA_DB_KEY_ANY can be used to match all. |
| */ |
| |
| static int db_for_each_64(const struct os_area_db *db, |
| const struct os_area_db_id *match_id, struct db_iterator *i) |
| { |
| next: |
| if (!i->db) { |
| i->db = db; |
| i->match_id = match_id ? *match_id : os_area_db_id_any; |
| i->idx = (void *)db + db->index_64; |
| i->last_idx = i->idx + db->count_64; |
| i->value_64 = (void *)db + db->index_64 |
| + db_align_up(db->count_64, 8); |
| } else { |
| i->idx++; |
| i->value_64++; |
| } |
| |
| if (i->idx >= i->last_idx) { |
| pr_debug("%s:%d: reached end\n", __func__, __LINE__); |
| return 0; |
| } |
| |
| if (i->match_id.owner != OS_AREA_DB_OWNER_ANY |
| && i->match_id.owner != (int)i->idx->owner) |
| goto next; |
| if (i->match_id.key != OS_AREA_DB_KEY_ANY |
| && i->match_id.key != (int)i->idx->key) |
| goto next; |
| |
| return 1; |
| } |
| |
| static int db_delete_64(struct os_area_db *db, const struct os_area_db_id *id) |
| { |
| struct db_iterator i; |
| |
| for (i.db = NULL; db_for_each_64(db, id, &i); ) { |
| |
| pr_debug("%s:%d: got (%d:%d) %llxh\n", __func__, __LINE__, |
| i.idx->owner, i.idx->key, |
| (unsigned long long)*i.value_64); |
| |
| i.idx->owner = 0; |
| i.idx->key = 0; |
| *i.value_64 = 0; |
| } |
| return 0; |
| } |
| |
| static int db_set_64(struct os_area_db *db, const struct os_area_db_id *id, |
| uint64_t value) |
| { |
| struct db_iterator i; |
| |
| pr_debug("%s:%d: (%d:%d) <= %llxh\n", __func__, __LINE__, |
| id->owner, id->key, (unsigned long long)value); |
| |
| if (!id->owner || id->owner == OS_AREA_DB_OWNER_ANY |
| || id->key == OS_AREA_DB_KEY_ANY) { |
| pr_debug("%s:%d: bad id: (%d:%d)\n", __func__, |
| __LINE__, id->owner, id->key); |
| return -1; |
| } |
| |
| db_delete_64(db, id); |
| |
| i.db = NULL; |
| if (db_for_each_64(db, &os_area_db_id_empty, &i)) { |
| |
| pr_debug("%s:%d: got (%d:%d) %llxh\n", __func__, __LINE__, |
| i.idx->owner, i.idx->key, |
| (unsigned long long)*i.value_64); |
| |
| i.idx->owner = id->owner; |
| i.idx->key = id->key; |
| *i.value_64 = value; |
| |
| pr_debug("%s:%d: set (%d:%d) <= %llxh\n", __func__, __LINE__, |
| i.idx->owner, i.idx->key, |
| (unsigned long long)*i.value_64); |
| return 0; |
| } |
| pr_debug("%s:%d: database full.\n", |
| __func__, __LINE__); |
| return -1; |
| } |
| |
| static int db_get_64(const struct os_area_db *db, |
| const struct os_area_db_id *id, uint64_t *value) |
| { |
| struct db_iterator i; |
| |
| i.db = NULL; |
| if (db_for_each_64(db, id, &i)) { |
| *value = *i.value_64; |
| pr_debug("%s:%d: found %lld\n", __func__, __LINE__, |
| (long long int)*i.value_64); |
| return 0; |
| } |
| pr_debug("%s:%d: not found\n", __func__, __LINE__); |
| return -1; |
| } |
| |
| static int db_get_rtc_diff(const struct os_area_db *db, int64_t *rtc_diff) |
| { |
| return db_get_64(db, &os_area_db_id_rtc_diff, (uint64_t*)rtc_diff); |
| } |
| |
| #define dump_db(a) _dump_db(a, __func__, __LINE__) |
| static void _dump_db(const struct os_area_db *db, const char *func, |
| int line) |
| { |
| char str[sizeof(db->magic_num) + 1]; |
| |
| dump_field(str, db->magic_num, sizeof(db->magic_num)); |
| pr_debug("%s:%d: db.magic_num: '%s'\n", func, line, |
| str); |
| pr_debug("%s:%d: db.version: %u\n", func, line, |
| db->version); |
| pr_debug("%s:%d: db.index_64: %u\n", func, line, |
| db->index_64); |
| pr_debug("%s:%d: db.count_64: %u\n", func, line, |
| db->count_64); |
| pr_debug("%s:%d: db.index_32: %u\n", func, line, |
| db->index_32); |
| pr_debug("%s:%d: db.count_32: %u\n", func, line, |
| db->count_32); |
| pr_debug("%s:%d: db.index_16: %u\n", func, line, |
| db->index_16); |
| pr_debug("%s:%d: db.count_16: %u\n", func, line, |
| db->count_16); |
| } |
| |
| static void os_area_db_init(struct os_area_db *db) |
| { |
| enum { |
| HEADER_SIZE = offsetof(struct os_area_db, _db_data), |
| INDEX_64_COUNT = 64, |
| VALUES_64_COUNT = 57, |
| INDEX_32_COUNT = 64, |
| VALUES_32_COUNT = 57, |
| INDEX_16_COUNT = 64, |
| VALUES_16_COUNT = 57, |
| }; |
| |
| memset(db, 0, sizeof(struct os_area_db)); |
| |
| memcpy(db->magic_num, OS_AREA_DB_MAGIC_NUM, sizeof(db->magic_num)); |
| db->version = 1; |
| db->index_64 = HEADER_SIZE; |
| db->count_64 = VALUES_64_COUNT; |
| db->index_32 = HEADER_SIZE |
| + INDEX_64_COUNT * sizeof(struct db_index) |
| + VALUES_64_COUNT * sizeof(u64); |
| db->count_32 = VALUES_32_COUNT; |
| db->index_16 = HEADER_SIZE |
| + INDEX_64_COUNT * sizeof(struct db_index) |
| + VALUES_64_COUNT * sizeof(u64) |
| + INDEX_32_COUNT * sizeof(struct db_index) |
| + VALUES_32_COUNT * sizeof(u32); |
| db->count_16 = VALUES_16_COUNT; |
| |
| /* Rules to check db layout. */ |
| |
| BUILD_BUG_ON(sizeof(struct db_index) != 1); |
| BUILD_BUG_ON(sizeof(struct os_area_db) != 2 * OS_AREA_SEGMENT_SIZE); |
| BUILD_BUG_ON(INDEX_64_COUNT & 0x7); |
| BUILD_BUG_ON(VALUES_64_COUNT > INDEX_64_COUNT); |
| BUILD_BUG_ON(INDEX_32_COUNT & 0x7); |
| BUILD_BUG_ON(VALUES_32_COUNT > INDEX_32_COUNT); |
| BUILD_BUG_ON(INDEX_16_COUNT & 0x7); |
| BUILD_BUG_ON(VALUES_16_COUNT > INDEX_16_COUNT); |
| BUILD_BUG_ON(HEADER_SIZE |
| + INDEX_64_COUNT * sizeof(struct db_index) |
| + VALUES_64_COUNT * sizeof(u64) |
| + INDEX_32_COUNT * sizeof(struct db_index) |
| + VALUES_32_COUNT * sizeof(u32) |
| + INDEX_16_COUNT * sizeof(struct db_index) |
| + VALUES_16_COUNT * sizeof(u16) |
| > sizeof(struct os_area_db)); |
| } |
| |
| /** |
| * update_flash_db - Helper for os_area_queue_work_handler. |
| * |
| */ |
| |
| static int update_flash_db(void) |
| { |
| const unsigned int buf_len = 8 * OS_AREA_SEGMENT_SIZE; |
| struct os_area_header *header; |
| ssize_t count; |
| int error; |
| loff_t pos; |
| struct os_area_db* db; |
| |
| /* Read in header and db from flash. */ |
| |
| header = kmalloc(buf_len, GFP_KERNEL); |
| if (!header) { |
| pr_debug("%s: kmalloc failed\n", __func__); |
| return -ENOMEM; |
| } |
| |
| count = os_area_flash_read(header, buf_len, 0); |
| if (count < 0) { |
| pr_debug("%s: os_area_flash_read failed %zd\n", __func__, |
| count); |
| error = count; |
| goto fail; |
| } |
| |
| pos = header->db_area_offset * OS_AREA_SEGMENT_SIZE; |
| if (count < OS_AREA_SEGMENT_SIZE || verify_header(header) || |
| count < pos) { |
| pr_debug("%s: verify_header failed\n", __func__); |
| dump_header(header); |
| error = -EINVAL; |
| goto fail; |
| } |
| |
| /* Now got a good db offset and some maybe good db data. */ |
| |
| db = (void *)header + pos; |
| |
| error = db_verify(db); |
| if (error) { |
| pr_notice("%s: Verify of flash database failed, formatting.\n", |
| __func__); |
| dump_db(db); |
| os_area_db_init(db); |
| } |
| |
| /* Now got good db data. */ |
| |
| db_set_64(db, &os_area_db_id_rtc_diff, saved_params.rtc_diff); |
| |
| count = os_area_flash_write(db, sizeof(struct os_area_db), pos); |
| if (count < 0 || count < sizeof(struct os_area_db)) { |
| pr_debug("%s: os_area_flash_write failed %zd\n", __func__, |
| count); |
| error = count < 0 ? count : -EIO; |
| } |
| |
| fail: |
| kfree(header); |
| return error; |
| } |
| |
| /** |
| * os_area_queue_work_handler - Asynchronous write handler. |
| * |
| * An asynchronous write for flash memory and the device tree. Do not |
| * call directly, use os_area_queue_work(). |
| */ |
| |
| static void os_area_queue_work_handler(struct work_struct *work) |
| { |
| struct device_node *node; |
| int error; |
| |
| pr_debug(" -> %s:%d\n", __func__, __LINE__); |
| |
| node = of_find_node_by_path("/"); |
| if (node) { |
| os_area_set_property(node, &property_rtc_diff); |
| of_node_put(node); |
| } else |
| pr_debug("%s:%d of_find_node_by_path failed\n", |
| __func__, __LINE__); |
| |
| error = update_flash_db(); |
| if (error) |
| pr_warn("%s: Could not update FLASH ROM\n", __func__); |
| |
| pr_debug(" <- %s:%d\n", __func__, __LINE__); |
| } |
| |
| static void os_area_queue_work(void) |
| { |
| static DECLARE_WORK(q, os_area_queue_work_handler); |
| |
| wmb(); |
| schedule_work(&q); |
| } |
| |
| /** |
| * ps3_os_area_save_params - Copy data from os area mirror to @saved_params. |
| * |
| * For the convenience of the guest the HV makes a copy of the os area in |
| * flash to a high address in the boot memory region and then puts that RAM |
| * address and the byte count into the repository for retrieval by the guest. |
| * We copy the data we want into a static variable and allow the memory setup |
| * by the HV to be claimed by the memblock manager. |
| * |
| * The os area mirror will not be available to a second stage kernel, and |
| * the header verify will fail. In this case, the saved_params values will |
| * be set from flash memory or the passed in device tree in ps3_os_area_init(). |
| */ |
| |
| void __init ps3_os_area_save_params(void) |
| { |
| int result; |
| u64 lpar_addr; |
| unsigned int size; |
| struct os_area_header *header; |
| struct os_area_params *params; |
| struct os_area_db *db; |
| |
| pr_debug(" -> %s:%d\n", __func__, __LINE__); |
| |
| result = ps3_repository_read_boot_dat_info(&lpar_addr, &size); |
| |
| if (result) { |
| pr_debug("%s:%d ps3_repository_read_boot_dat_info failed\n", |
| __func__, __LINE__); |
| return; |
| } |
| |
| header = (struct os_area_header *)__va(lpar_addr); |
| params = (struct os_area_params *)__va(lpar_addr |
| + OS_AREA_SEGMENT_SIZE); |
| |
| result = verify_header(header); |
| |
| if (result) { |
| /* Second stage kernels exit here. */ |
| pr_debug("%s:%d verify_header failed\n", __func__, __LINE__); |
| dump_header(header); |
| return; |
| } |
| |
| db = (struct os_area_db *)__va(lpar_addr |
| + header->db_area_offset * OS_AREA_SEGMENT_SIZE); |
| |
| dump_header(header); |
| dump_params(params); |
| dump_db(db); |
| |
| result = db_verify(db) || db_get_rtc_diff(db, &saved_params.rtc_diff); |
| if (result) |
| saved_params.rtc_diff = params->rtc_diff ? params->rtc_diff |
| : SECONDS_FROM_1970_TO_2000; |
| saved_params.av_multi_out = params->av_multi_out; |
| saved_params.valid = 1; |
| |
| memset(header, 0, sizeof(*header)); |
| |
| pr_debug(" <- %s:%d\n", __func__, __LINE__); |
| } |
| |
| /** |
| * ps3_os_area_init - Setup os area device tree properties as needed. |
| */ |
| |
| void __init ps3_os_area_init(void) |
| { |
| struct device_node *node; |
| |
| pr_debug(" -> %s:%d\n", __func__, __LINE__); |
| |
| node = of_find_node_by_path("/"); |
| |
| if (!saved_params.valid && node) { |
| /* Second stage kernels should have a dt entry. */ |
| os_area_get_property(node, &property_rtc_diff); |
| os_area_get_property(node, &property_av_multi_out); |
| } |
| |
| if(!saved_params.rtc_diff) |
| saved_params.rtc_diff = SECONDS_FROM_1970_TO_2000; |
| |
| if (node) { |
| os_area_set_property(node, &property_rtc_diff); |
| os_area_set_property(node, &property_av_multi_out); |
| of_node_put(node); |
| } else |
| pr_debug("%s:%d of_find_node_by_path failed\n", |
| __func__, __LINE__); |
| |
| pr_debug(" <- %s:%d\n", __func__, __LINE__); |
| } |
| |
| /** |
| * ps3_os_area_get_rtc_diff - Returns the rtc diff value. |
| */ |
| |
| u64 ps3_os_area_get_rtc_diff(void) |
| { |
| return saved_params.rtc_diff; |
| } |
| EXPORT_SYMBOL_GPL(ps3_os_area_get_rtc_diff); |
| |
| /** |
| * ps3_os_area_set_rtc_diff - Set the rtc diff value. |
| * |
| * An asynchronous write is needed to support writing updates from |
| * the timer interrupt context. |
| */ |
| |
| void ps3_os_area_set_rtc_diff(u64 rtc_diff) |
| { |
| if (saved_params.rtc_diff != rtc_diff) { |
| saved_params.rtc_diff = rtc_diff; |
| os_area_queue_work(); |
| } |
| } |
| EXPORT_SYMBOL_GPL(ps3_os_area_set_rtc_diff); |
| |
| /** |
| * ps3_os_area_get_av_multi_out - Returns the default video mode. |
| */ |
| |
| enum ps3_param_av_multi_out ps3_os_area_get_av_multi_out(void) |
| { |
| return saved_params.av_multi_out; |
| } |
| EXPORT_SYMBOL_GPL(ps3_os_area_get_av_multi_out); |