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-rw-r--r--arch/powerpc/platforms/ps3/os-area.c832
1 files changed, 832 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/ps3/os-area.c b/arch/powerpc/platforms/ps3/os-area.c
new file mode 100644
index 000000000..e8530371a
--- /dev/null
+++ b/arch/powerpc/platforms/ps3/os-area.c
@@ -0,0 +1,832 @@
+// 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)
+ 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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 20:29:18 +0000