[POWERPC] ps3: add OS params support

obj-y += setup.o mm.o smp.o time.o hvcall.o htab.o repository.o

obj-y += interrupt.o exports.o

obj-y += interrupt.o exports.o os-area.o

/*

 *  PS3 'Other OS' area data.

 *

 *  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 <asm/ps3.h>

#include "platform.h"

enum {

	OS_AREA_SEGMENT_SIZE = 0X200,

};

enum {

	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 {

	s8 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];

} __attribute__ ((packed));

enum {

	PARAM_BOOT_FLAG_GAME_OS = 0,

	PARAM_BOOT_FLAG_OTHER_OS = 1,

};

enum {

	PARAM_AV_MULTI_OUT_NTSC = 0,

	PARAM_AV_MULTI_OUT_PAL_RGB = 1,

	PARAM_AV_MULTI_OUT_PAL_YCBCR = 2,

	PARAM_AV_MULTI_OUT_SECAM = 3,

};

enum {

	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.

 *

 * 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];

} __attribute__ ((packed));

/**

 * struct saved_params - Static working copies of data from the 'Other OS' area.

 *

 * For the convinience of the guest, the HV makes a copy of the 'Other 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.

 */

struct saved_params {

	/* param 0 */

	s64 rtc_diff;

	unsigned int av_multi_out;

	unsigned int ctrl_button;

	/* param 1 */

	u8 static_ip_addr[4];

	u8 network_mask[4];

	u8 default_gateway[4];

	/* param 2 */

	u8 dns_primary[4];

	u8 dns_secondary[4];

} static saved_params;

#define dump_header(_a) _dump_header(_a, __func__, __LINE__)

static void _dump_header(const struct os_area_header __iomem *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 __iomem *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;

}

int __init ps3_os_area_init(void)

{

	int result;

	u64 lpar_addr;

	unsigned int size;

	struct os_area_header *header;

	struct os_area_params *params;

	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 result;

	}

	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 -EIO;

	}

	dump_header(header);

	dump_params(params);

	saved_params.rtc_diff = params->rtc_diff;

	saved_params.av_multi_out = params->av_multi_out;

	saved_params.ctrl_button = params->ctrl_button;

	memcpy(saved_params.static_ip_addr, params->static_ip_addr, 4);

	memcpy(saved_params.network_mask, params->network_mask, 4);

	memcpy(saved_params.default_gateway, params->default_gateway, 4);

	memcpy(saved_params.dns_secondary, params->dns_secondary, 4);

	return result;

}

/**

 * ps3_os_area_rtc_diff - Returns the ps3 rtc diff value.

 *

 * The ps3 rtc maintains a value that approximates seconds since

 * 2000-01-01 00:00:00 UTC.  Returns the exact number of seconds from 1970 to

 * 2000 when saved_params.rtc_diff has not been properly set up.

 */

u64 ps3_os_area_rtc_diff(void)

{

	return saved_params.rtc_diff ? saved_params.rtc_diff : 946684800UL;

}