summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/platforms/ps3/os-area.c
blob: 58358305dc10061bebe54a4b0b6281c6b82bd9f2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
/*
 *  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;
}
OpenPOWER on IntegriCloud