831 lines
21 KiB
C
831 lines
21 KiB
C
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// 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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#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 "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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* 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)
|
||
|
{
|
||
|
return (val + (size - 1)) & (~(size - 1));
|
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|
}
|
||
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|
||
|
/**
|
||
|
* 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 __init 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 __init 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);
|