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832 lines
21 KiB
832 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* PS3 flash memory os area. |
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* |
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* Copyright (C) 2006 Sony Computer Entertainment Inc. |
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* Copyright 2006 Sony Corp. |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/io.h> |
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#include <linux/workqueue.h> |
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#include <linux/fs.h> |
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#include <linux/syscalls.h> |
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#include <linux/export.h> |
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#include <linux/ctype.h> |
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#include <linux/memblock.h> |
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#include <linux/of.h> |
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#include <linux/slab.h> |
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#include <asm/prom.h> |
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#include "platform.h" |
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enum { |
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OS_AREA_SEGMENT_SIZE = 0X200, |
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}; |
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enum os_area_ldr_format { |
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HEADER_LDR_FORMAT_RAW = 0, |
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HEADER_LDR_FORMAT_GZIP = 1, |
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}; |
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#define OS_AREA_HEADER_MAGIC_NUM "cell_ext_os_area" |
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|
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/** |
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* struct os_area_header - os area header segment. |
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* @magic_num: Always 'cell_ext_os_area'. |
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* @hdr_version: Header format version number. |
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* @db_area_offset: Starting segment number of other os database area. |
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* @ldr_area_offset: Starting segment number of bootloader image area. |
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* @ldr_format: HEADER_LDR_FORMAT flag. |
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* @ldr_size: Size of bootloader image in bytes. |
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* |
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* Note that the docs refer to area offsets. These are offsets in units of |
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* segments from the start of the os area (top of the header). These are |
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* better thought of as segment numbers. The os area of the os area is |
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* reserved for the os image. |
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*/ |
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struct os_area_header { |
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u8 magic_num[16]; |
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u32 hdr_version; |
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u32 db_area_offset; |
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u32 ldr_area_offset; |
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u32 _reserved_1; |
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u32 ldr_format; |
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u32 ldr_size; |
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u32 _reserved_2[6]; |
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}; |
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enum os_area_boot_flag { |
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PARAM_BOOT_FLAG_GAME_OS = 0, |
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PARAM_BOOT_FLAG_OTHER_OS = 1, |
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}; |
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enum os_area_ctrl_button { |
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PARAM_CTRL_BUTTON_O_IS_YES = 0, |
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PARAM_CTRL_BUTTON_X_IS_YES = 1, |
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}; |
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/** |
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* struct os_area_params - os area params segment. |
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* @boot_flag: User preference of operating system, PARAM_BOOT_FLAG flag. |
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* @num_params: Number of params in this (params) segment. |
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* @rtc_diff: Difference in seconds between 1970 and the ps3 rtc value. |
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* @av_multi_out: User preference of AV output, PARAM_AV_MULTI_OUT flag. |
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* @ctrl_button: User preference of controller button config, PARAM_CTRL_BUTTON |
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* flag. |
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* @static_ip_addr: User preference of static IP address. |
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* @network_mask: User preference of static network mask. |
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* @default_gateway: User preference of static default gateway. |
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* @dns_primary: User preference of static primary dns server. |
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* @dns_secondary: User preference of static secondary dns server. |
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* |
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* The ps3 rtc maintains a read-only value that approximates seconds since |
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* 2000-01-01 00:00:00 UTC. |
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* |
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* User preference of zero for static_ip_addr means use dhcp. |
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*/ |
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struct os_area_params { |
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u32 boot_flag; |
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u32 _reserved_1[3]; |
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u32 num_params; |
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u32 _reserved_2[3]; |
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/* param 0 */ |
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s64 rtc_diff; |
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u8 av_multi_out; |
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u8 ctrl_button; |
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u8 _reserved_3[6]; |
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/* param 1 */ |
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u8 static_ip_addr[4]; |
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u8 network_mask[4]; |
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u8 default_gateway[4]; |
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u8 _reserved_4[4]; |
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/* param 2 */ |
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u8 dns_primary[4]; |
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u8 dns_secondary[4]; |
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u8 _reserved_5[8]; |
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}; |
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#define OS_AREA_DB_MAGIC_NUM "-db-" |
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/** |
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* struct os_area_db - Shared flash memory database. |
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* @magic_num: Always '-db-'. |
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* @version: os_area_db format version number. |
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* @index_64: byte offset of the database id index for 64 bit variables. |
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* @count_64: number of usable 64 bit index entries |
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* @index_32: byte offset of the database id index for 32 bit variables. |
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* @count_32: number of usable 32 bit index entries |
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* @index_16: byte offset of the database id index for 16 bit variables. |
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* @count_16: number of usable 16 bit index entries |
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* |
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* Flash rom storage for exclusive use by guests running in the other os lpar. |
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* The current system configuration allocates 1K (two segments) for other os |
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* use. |
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*/ |
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struct os_area_db { |
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u8 magic_num[4]; |
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u16 version; |
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u16 _reserved_1; |
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u16 index_64; |
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u16 count_64; |
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u16 index_32; |
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u16 count_32; |
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u16 index_16; |
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u16 count_16; |
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u32 _reserved_2; |
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u8 _db_data[1000]; |
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}; |
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/** |
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* enum os_area_db_owner - Data owners. |
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*/ |
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enum os_area_db_owner { |
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OS_AREA_DB_OWNER_ANY = -1, |
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OS_AREA_DB_OWNER_NONE = 0, |
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OS_AREA_DB_OWNER_PROTOTYPE = 1, |
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OS_AREA_DB_OWNER_LINUX = 2, |
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OS_AREA_DB_OWNER_PETITBOOT = 3, |
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OS_AREA_DB_OWNER_MAX = 32, |
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}; |
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enum os_area_db_key { |
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OS_AREA_DB_KEY_ANY = -1, |
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OS_AREA_DB_KEY_NONE = 0, |
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OS_AREA_DB_KEY_RTC_DIFF = 1, |
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OS_AREA_DB_KEY_VIDEO_MODE = 2, |
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OS_AREA_DB_KEY_MAX = 8, |
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}; |
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struct os_area_db_id { |
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int owner; |
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int key; |
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}; |
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static const struct os_area_db_id os_area_db_id_empty = { |
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.owner = OS_AREA_DB_OWNER_NONE, |
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.key = OS_AREA_DB_KEY_NONE |
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}; |
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static const struct os_area_db_id os_area_db_id_any = { |
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.owner = OS_AREA_DB_OWNER_ANY, |
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.key = OS_AREA_DB_KEY_ANY |
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}; |
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static const struct os_area_db_id os_area_db_id_rtc_diff = { |
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.owner = OS_AREA_DB_OWNER_LINUX, |
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.key = OS_AREA_DB_KEY_RTC_DIFF |
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}; |
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#define SECONDS_FROM_1970_TO_2000 946684800LL |
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/** |
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* struct saved_params - Static working copies of data from the PS3 'os area'. |
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* |
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* The order of preference we use for the rtc_diff source: |
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* 1) The database value. |
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* 2) The game os value. |
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* 3) The number of seconds from 1970 to 2000. |
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*/ |
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static struct saved_params { |
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unsigned int valid; |
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s64 rtc_diff; |
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unsigned int av_multi_out; |
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} saved_params; |
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static struct property property_rtc_diff = { |
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.name = "linux,rtc_diff", |
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.length = sizeof(saved_params.rtc_diff), |
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.value = &saved_params.rtc_diff, |
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}; |
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static struct property property_av_multi_out = { |
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.name = "linux,av_multi_out", |
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.length = sizeof(saved_params.av_multi_out), |
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.value = &saved_params.av_multi_out, |
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}; |
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static DEFINE_MUTEX(os_area_flash_mutex); |
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static const struct ps3_os_area_flash_ops *os_area_flash_ops; |
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void ps3_os_area_flash_register(const struct ps3_os_area_flash_ops *ops) |
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{ |
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mutex_lock(&os_area_flash_mutex); |
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os_area_flash_ops = ops; |
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mutex_unlock(&os_area_flash_mutex); |
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} |
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EXPORT_SYMBOL_GPL(ps3_os_area_flash_register); |
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static ssize_t os_area_flash_read(void *buf, size_t count, loff_t pos) |
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{ |
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ssize_t res = -ENODEV; |
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mutex_lock(&os_area_flash_mutex); |
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if (os_area_flash_ops) |
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res = os_area_flash_ops->read(buf, count, pos); |
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mutex_unlock(&os_area_flash_mutex); |
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return res; |
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} |
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static ssize_t os_area_flash_write(const void *buf, size_t count, loff_t pos) |
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{ |
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ssize_t res = -ENODEV; |
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mutex_lock(&os_area_flash_mutex); |
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if (os_area_flash_ops) |
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res = os_area_flash_ops->write(buf, count, pos); |
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mutex_unlock(&os_area_flash_mutex); |
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return res; |
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} |
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/** |
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* os_area_set_property - Add or overwrite a saved_params value to the device tree. |
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* |
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* Overwrites an existing property. |
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*/ |
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static void os_area_set_property(struct device_node *node, |
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struct property *prop) |
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{ |
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int result; |
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struct property *tmp = of_find_property(node, prop->name, NULL); |
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if (tmp) { |
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pr_debug("%s:%d found %s\n", __func__, __LINE__, prop->name); |
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of_remove_property(node, tmp); |
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} |
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result = of_add_property(node, prop); |
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if (result) |
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pr_debug("%s:%d of_set_property failed\n", __func__, |
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__LINE__); |
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} |
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/** |
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* os_area_get_property - Get a saved_params value from the device tree. |
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* |
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*/ |
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static void __init os_area_get_property(struct device_node *node, |
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struct property *prop) |
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{ |
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const struct property *tmp = of_find_property(node, prop->name, NULL); |
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if (tmp) { |
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BUG_ON(prop->length != tmp->length); |
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memcpy(prop->value, tmp->value, prop->length); |
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} else |
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pr_debug("%s:%d not found %s\n", __func__, __LINE__, |
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prop->name); |
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} |
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static void dump_field(char *s, const u8 *field, int size_of_field) |
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{ |
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#if defined(DEBUG) |
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int i; |
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for (i = 0; i < size_of_field; i++) |
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s[i] = isprint(field[i]) ? field[i] : '.'; |
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s[i] = 0; |
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#endif |
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} |
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#define dump_header(_a) _dump_header(_a, __func__, __LINE__) |
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static void _dump_header(const struct os_area_header *h, const char *func, |
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int line) |
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{ |
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char str[sizeof(h->magic_num) + 1]; |
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dump_field(str, h->magic_num, sizeof(h->magic_num)); |
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pr_debug("%s:%d: h.magic_num: '%s'\n", func, line, |
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str); |
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pr_debug("%s:%d: h.hdr_version: %u\n", func, line, |
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h->hdr_version); |
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pr_debug("%s:%d: h.db_area_offset: %u\n", func, line, |
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h->db_area_offset); |
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pr_debug("%s:%d: h.ldr_area_offset: %u\n", func, line, |
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h->ldr_area_offset); |
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pr_debug("%s:%d: h.ldr_format: %u\n", func, line, |
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h->ldr_format); |
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pr_debug("%s:%d: h.ldr_size: %xh\n", func, line, |
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h->ldr_size); |
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} |
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#define dump_params(_a) _dump_params(_a, __func__, __LINE__) |
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static void _dump_params(const struct os_area_params *p, const char *func, |
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int line) |
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{ |
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pr_debug("%s:%d: p.boot_flag: %u\n", func, line, p->boot_flag); |
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pr_debug("%s:%d: p.num_params: %u\n", func, line, p->num_params); |
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pr_debug("%s:%d: p.rtc_diff %lld\n", func, line, p->rtc_diff); |
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pr_debug("%s:%d: p.av_multi_out %u\n", func, line, p->av_multi_out); |
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pr_debug("%s:%d: p.ctrl_button: %u\n", func, line, p->ctrl_button); |
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pr_debug("%s:%d: p.static_ip_addr: %u.%u.%u.%u\n", func, line, |
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p->static_ip_addr[0], p->static_ip_addr[1], |
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p->static_ip_addr[2], p->static_ip_addr[3]); |
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pr_debug("%s:%d: p.network_mask: %u.%u.%u.%u\n", func, line, |
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p->network_mask[0], p->network_mask[1], |
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p->network_mask[2], p->network_mask[3]); |
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pr_debug("%s:%d: p.default_gateway: %u.%u.%u.%u\n", func, line, |
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p->default_gateway[0], p->default_gateway[1], |
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p->default_gateway[2], p->default_gateway[3]); |
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pr_debug("%s:%d: p.dns_primary: %u.%u.%u.%u\n", func, line, |
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p->dns_primary[0], p->dns_primary[1], |
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p->dns_primary[2], p->dns_primary[3]); |
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pr_debug("%s:%d: p.dns_secondary: %u.%u.%u.%u\n", func, line, |
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p->dns_secondary[0], p->dns_secondary[1], |
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p->dns_secondary[2], p->dns_secondary[3]); |
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} |
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static int verify_header(const struct os_area_header *header) |
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{ |
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if (memcmp(header->magic_num, OS_AREA_HEADER_MAGIC_NUM, |
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sizeof(header->magic_num))) { |
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pr_debug("%s:%d magic_num failed\n", __func__, __LINE__); |
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return -1; |
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} |
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if (header->hdr_version < 1) { |
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pr_debug("%s:%d hdr_version failed\n", __func__, __LINE__); |
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return -1; |
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} |
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if (header->db_area_offset > header->ldr_area_offset) { |
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pr_debug("%s:%d offsets failed\n", __func__, __LINE__); |
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return -1; |
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} |
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return 0; |
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} |
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static int db_verify(const struct os_area_db *db) |
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{ |
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if (memcmp(db->magic_num, OS_AREA_DB_MAGIC_NUM, |
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sizeof(db->magic_num))) { |
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pr_debug("%s:%d magic_num failed\n", __func__, __LINE__); |
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return -EINVAL; |
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} |
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if (db->version != 1) { |
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pr_debug("%s:%d version failed\n", __func__, __LINE__); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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struct db_index { |
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uint8_t owner:5; |
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uint8_t key:3; |
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}; |
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struct db_iterator { |
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const struct os_area_db *db; |
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struct os_area_db_id match_id; |
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struct db_index *idx; |
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struct db_index *last_idx; |
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union { |
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uint64_t *value_64; |
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uint32_t *value_32; |
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uint16_t *value_16; |
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}; |
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}; |
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static unsigned int db_align_up(unsigned int val, unsigned int size) |
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{ |
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return (val + (size - 1)) & (~(size - 1)); |
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} |
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/** |
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* db_for_each_64 - Iterator for 64 bit entries. |
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* |
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* A NULL value for id can be used to match all entries. |
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* OS_AREA_DB_OWNER_ANY and OS_AREA_DB_KEY_ANY can be used to match all. |
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*/ |
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static int db_for_each_64(const struct os_area_db *db, |
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const struct os_area_db_id *match_id, struct db_iterator *i) |
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{ |
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next: |
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if (!i->db) { |
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i->db = db; |
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i->match_id = match_id ? *match_id : os_area_db_id_any; |
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i->idx = (void *)db + db->index_64; |
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i->last_idx = i->idx + db->count_64; |
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i->value_64 = (void *)db + db->index_64 |
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+ db_align_up(db->count_64, 8); |
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} else { |
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i->idx++; |
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i->value_64++; |
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} |
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if (i->idx >= i->last_idx) { |
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pr_debug("%s:%d: reached end\n", __func__, __LINE__); |
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return 0; |
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} |
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if (i->match_id.owner != OS_AREA_DB_OWNER_ANY |
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&& i->match_id.owner != (int)i->idx->owner) |
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goto next; |
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if (i->match_id.key != OS_AREA_DB_KEY_ANY |
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&& i->match_id.key != (int)i->idx->key) |
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goto next; |
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return 1; |
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} |
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static int db_delete_64(struct os_area_db *db, const struct os_area_db_id *id) |
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{ |
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struct db_iterator i; |
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for (i.db = NULL; db_for_each_64(db, id, &i); ) { |
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pr_debug("%s:%d: got (%d:%d) %llxh\n", __func__, __LINE__, |
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i.idx->owner, i.idx->key, |
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(unsigned long long)*i.value_64); |
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i.idx->owner = 0; |
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i.idx->key = 0; |
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*i.value_64 = 0; |
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} |
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return 0; |
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} |
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static int db_set_64(struct os_area_db *db, const struct os_area_db_id *id, |
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uint64_t value) |
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{ |
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struct db_iterator i; |
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pr_debug("%s:%d: (%d:%d) <= %llxh\n", __func__, __LINE__, |
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id->owner, id->key, (unsigned long long)value); |
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|
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if (!id->owner || id->owner == OS_AREA_DB_OWNER_ANY |
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|| id->key == OS_AREA_DB_KEY_ANY) { |
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pr_debug("%s:%d: bad id: (%d:%d)\n", __func__, |
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__LINE__, id->owner, id->key); |
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return -1; |
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} |
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db_delete_64(db, id); |
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i.db = NULL; |
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if (db_for_each_64(db, &os_area_db_id_empty, &i)) { |
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|
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pr_debug("%s:%d: got (%d:%d) %llxh\n", __func__, __LINE__, |
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i.idx->owner, i.idx->key, |
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(unsigned long long)*i.value_64); |
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i.idx->owner = id->owner; |
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i.idx->key = id->key; |
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*i.value_64 = value; |
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pr_debug("%s:%d: set (%d:%d) <= %llxh\n", __func__, __LINE__, |
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i.idx->owner, i.idx->key, |
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(unsigned long long)*i.value_64); |
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return 0; |
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} |
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pr_debug("%s:%d: database full.\n", |
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__func__, __LINE__); |
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return -1; |
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} |
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static int db_get_64(const struct os_area_db *db, |
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const struct os_area_db_id *id, uint64_t *value) |
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{ |
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struct db_iterator i; |
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|
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i.db = NULL; |
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if (db_for_each_64(db, id, &i)) { |
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*value = *i.value_64; |
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pr_debug("%s:%d: found %lld\n", __func__, __LINE__, |
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(long long int)*i.value_64); |
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return 0; |
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} |
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pr_debug("%s:%d: not found\n", __func__, __LINE__); |
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return -1; |
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} |
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|
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static int db_get_rtc_diff(const struct os_area_db *db, int64_t *rtc_diff) |
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{ |
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return db_get_64(db, &os_area_db_id_rtc_diff, (uint64_t*)rtc_diff); |
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} |
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|
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#define dump_db(a) _dump_db(a, __func__, __LINE__) |
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static void _dump_db(const struct os_area_db *db, const char *func, |
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int line) |
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{ |
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char str[sizeof(db->magic_num) + 1]; |
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|
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dump_field(str, db->magic_num, sizeof(db->magic_num)); |
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pr_debug("%s:%d: db.magic_num: '%s'\n", func, line, |
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str); |
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pr_debug("%s:%d: db.version: %u\n", func, line, |
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db->version); |
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pr_debug("%s:%d: db.index_64: %u\n", func, line, |
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db->index_64); |
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pr_debug("%s:%d: db.count_64: %u\n", func, line, |
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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);
|
|
|