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/*
* PS3 flash memory os area.
*
* Copyright (C) 2006 Sony Computer Entertainment Inc.
* Copyright 2006 Sony Corp.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/io.h>
#include <asm/lmb.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,
};
/**
* struct os_area_header - os area header segment.
* @magic_num: Always 'cell_ext_os_area'.
* @hdr_version: Header format version number.
* @os_area_offset: Starting segment number of os image 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 os_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 SECONDS_FROM_1970_TO_2000 946684800LL
/**
* struct saved_params - Static working copies of data from the PS3 'os area'.
*/
struct saved_params {
s64 rtc_diff;
unsigned int av_multi_out;
} static saved_params;
#define dump_header(_a) _dump_header(_a, __func__, __LINE__)
static void _dump_header(const struct os_area_header *h, const char *func,
int line)
{
pr_debug("%s:%d: h.magic_num: '%s'\n", func, line,
h->magic_num);
pr_debug("%s:%d: h.hdr_version: %u\n", func, line,
h->hdr_version);
pr_debug("%s:%d: h.os_area_offset: %u\n", func, line,
h->os_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 %ld\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 __init verify_header(const struct os_area_header *header)
{
if (memcmp(header->magic_num, "cell_ext_os_area", 16)) {
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->os_area_offset > header->ldr_area_offset) {
pr_debug("%s:%d offsets failed\n", __func__, __LINE__);
return -1;
}
return 0;
}
/**
* 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 retreval 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 lmb manager.
*/
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;
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) {
pr_debug("%s:%d verify_header failed\n", __func__, __LINE__);
dump_header(header);
return;
}
dump_header(header);
dump_params(params);
saved_params.rtc_diff = params->rtc_diff;
saved_params.av_multi_out = params->av_multi_out;
memset(header, 0, sizeof(*header));
pr_debug(" <- %s:%d\n", __func__, __LINE__);
}
/**
* ps3_os_area_rtc_diff - Returns the rtc diff value.
*/
u64 ps3_os_area_rtc_diff(void)
{
return saved_params.rtc_diff ? saved_params.rtc_diff
: SECONDS_FROM_1970_TO_2000;
}
/**
* 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);
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