summaryrefslogtreecommitdiff
path: root/src/northbridge/intel/sandybridge/raminit_mrc.c
blob: 162caf6107e832caa2291a3d7a29e082eceb196f (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
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2011 Google Inc.
 *
 * 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.
 */

#include <console/console.h>
#include <console/usb.h>
#include <bootmode.h>
#include <string.h>
#include <arch/io.h>
#include <cbmem.h>
#include <arch/cbfs.h>
#include <cbfs.h>
#include <ip_checksum.h>
#include <pc80/mc146818rtc.h>
#include <device/pci_def.h>
#include <halt.h>
#include <timestamp.h>
#include "raminit.h"
#include "pei_data.h"
#include "sandybridge.h"

/* Management Engine is in the southbridge */
#include "southbridge/intel/bd82x6x/me.h"

/*
 * MRC scrambler seed offsets should be reserved in
 * mainboard cmos.layout and not covered by checksum.
 */
#if CONFIG_USE_OPTION_TABLE
#include "option_table.h"
#define CMOS_OFFSET_MRC_SEED     (CMOS_VSTART_mrc_scrambler_seed >> 3)
#define CMOS_OFFSET_MRC_SEED_S3  (CMOS_VSTART_mrc_scrambler_seed_s3 >> 3)
#define CMOS_OFFSET_MRC_SEED_CHK (CMOS_VSTART_mrc_scrambler_seed_chk >> 3)
#else
#define CMOS_OFFSET_MRC_SEED     152
#define CMOS_OFFSET_MRC_SEED_S3  156
#define CMOS_OFFSET_MRC_SEED_CHK 160
#endif

void save_mrc_data(struct pei_data *pei_data)
{
	u16 c1, c2, checksum;
	struct mrc_data_container *mrcdata;
	int output_len = ALIGN(pei_data->mrc_output_len, 16);

	/* Save the MRC S3 restore data to cbmem */
	mrcdata = cbmem_add
		(CBMEM_ID_MRCDATA,
		 output_len + sizeof(struct mrc_data_container));

	if (mrcdata != NULL) {
		printk(BIOS_DEBUG, "Relocate MRC DATA from %p to %p (%u bytes)\n",
			pei_data->mrc_output, mrcdata, output_len);

		mrcdata->mrc_signature = MRC_DATA_SIGNATURE;
		mrcdata->mrc_data_size = output_len;
		mrcdata->reserved = 0;
		memcpy(mrcdata->mrc_data, pei_data->mrc_output,
			pei_data->mrc_output_len);

		/* Zero the unused space in aligned buffer. */
		if (output_len > pei_data->mrc_output_len)
			memset(mrcdata->mrc_data+pei_data->mrc_output_len, 0,
			output_len - pei_data->mrc_output_len);

		mrcdata->mrc_checksum = compute_ip_checksum(mrcdata->mrc_data,
						mrcdata->mrc_data_size);
	}

	/* Save the MRC seed values to CMOS */
	cmos_write32(CMOS_OFFSET_MRC_SEED, pei_data->scrambler_seed);
	printk(BIOS_DEBUG, "Save scrambler seed    0x%08x to CMOS 0x%02x\n",
	       pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED);

	cmos_write32(CMOS_OFFSET_MRC_SEED_S3, pei_data->scrambler_seed_s3);
	printk(BIOS_DEBUG, "Save s3 scrambler seed 0x%08x to CMOS 0x%02x\n",
	       pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3);

	/* Save a simple checksum of the seed values */
	c1 = compute_ip_checksum((u8*)&pei_data->scrambler_seed,
				 sizeof(u32));
	c2 = compute_ip_checksum((u8*)&pei_data->scrambler_seed_s3,
				 sizeof(u32));
	checksum = add_ip_checksums(sizeof(u32), c1, c2);

	cmos_write(checksum & 0xff, CMOS_OFFSET_MRC_SEED_CHK);
	cmos_write((checksum >> 8) & 0xff, CMOS_OFFSET_MRC_SEED_CHK+1);
}

static void prepare_mrc_cache(struct pei_data *pei_data)
{
	struct mrc_data_container *mrc_cache;
	u16 c1, c2, checksum, seed_checksum;

	// preset just in case there is an error
	pei_data->mrc_input = NULL;
	pei_data->mrc_input_len = 0;

	/* Read scrambler seeds from CMOS */
	pei_data->scrambler_seed = cmos_read32(CMOS_OFFSET_MRC_SEED);
	printk(BIOS_DEBUG, "Read scrambler seed    0x%08x from CMOS 0x%02x\n",
	       pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED);

	pei_data->scrambler_seed_s3 = cmos_read32(CMOS_OFFSET_MRC_SEED_S3);
	printk(BIOS_DEBUG, "Read S3 scrambler seed 0x%08x from CMOS 0x%02x\n",
	       pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3);

	/* Compute seed checksum and compare */
	c1 = compute_ip_checksum((u8*)&pei_data->scrambler_seed,
				 sizeof(u32));
	c2 = compute_ip_checksum((u8*)&pei_data->scrambler_seed_s3,
				 sizeof(u32));
	checksum = add_ip_checksums(sizeof(u32), c1, c2);

	seed_checksum = cmos_read(CMOS_OFFSET_MRC_SEED_CHK);
	seed_checksum |= cmos_read(CMOS_OFFSET_MRC_SEED_CHK+1) << 8;

	if (checksum != seed_checksum) {
		printk(BIOS_ERR, "%s: invalid seed checksum\n", __func__);
		pei_data->scrambler_seed = 0;
		pei_data->scrambler_seed_s3 = 0;
		return;
	}

	if ((mrc_cache = find_current_mrc_cache()) == NULL) {
		/* error message printed in find_current_mrc_cache */
		return;
	}

	pei_data->mrc_input = mrc_cache->mrc_data;
	pei_data->mrc_input_len = mrc_cache->mrc_data_size;

	printk(BIOS_DEBUG, "%s: at %p, size %x checksum %04x\n",
	       __func__, pei_data->mrc_input,
	       pei_data->mrc_input_len, mrc_cache->mrc_checksum);
}

static const char* ecc_decoder[] = {
	"inactive",
	"active on IO",
	"disabled on IO",
	"active"
};

/*
 * Dump in the log memory controller configuration as read from the memory
 * controller registers.
 */
static void report_memory_config(void)
{
	u32 addr_decoder_common, addr_decode_ch[2];
	int i;

	addr_decoder_common = MCHBAR32(0x5000);
	addr_decode_ch[0] = MCHBAR32(0x5004);
	addr_decode_ch[1] = MCHBAR32(0x5008);

	printk(BIOS_DEBUG, "memcfg DDR3 clock %d MHz\n",
	       (MCHBAR32(0x5e04) * 13333 * 2 + 50)/100);
	printk(BIOS_DEBUG, "memcfg channel assignment: A: %d, B % d, C % d\n",
	       addr_decoder_common & 3,
	       (addr_decoder_common >> 2) & 3,
	       (addr_decoder_common >> 4) & 3);

	for (i = 0; i < ARRAY_SIZE(addr_decode_ch); i++) {
		u32 ch_conf = addr_decode_ch[i];
		printk(BIOS_DEBUG, "memcfg channel[%d] config (%8.8x):\n",
		       i, ch_conf);
		printk(BIOS_DEBUG, "   ECC %s\n",
		       ecc_decoder[(ch_conf >> 24) & 3]);
		printk(BIOS_DEBUG, "   enhanced interleave mode %s\n",
		       ((ch_conf >> 22) & 1) ? "on" : "off");
		printk(BIOS_DEBUG, "   rank interleave %s\n",
		       ((ch_conf >> 21) & 1) ? "on" : "off");
		printk(BIOS_DEBUG, "   DIMMA %d MB width x%d %s rank%s\n",
		       ((ch_conf >> 0) & 0xff) * 256,
		       ((ch_conf >> 19) & 1) ? 16 : 8,
		       ((ch_conf >> 17) & 1) ? "dual" : "single",
		       ((ch_conf >> 16) & 1) ? "" : ", selected");
		printk(BIOS_DEBUG, "   DIMMB %d MB width x%d %s rank%s\n",
		       ((ch_conf >> 8) & 0xff) * 256,
		       ((ch_conf >> 20) & 1) ? 16 : 8,
		       ((ch_conf >> 18) & 1) ? "dual" : "single",
		       ((ch_conf >> 16) & 1) ? ", selected" : "");
	}
}

/**
 * Find PEI executable in coreboot filesystem and execute it.
 *
 * @param pei_data: configuration data for UEFI PEI reference code
 */
void sdram_initialize(struct pei_data *pei_data)
{
	struct sys_info sysinfo;
	int (*entry) (struct pei_data *pei_data) __attribute__ ((regparm(1)));

	report_platform_info();

	/* Wait for ME to be ready */
	intel_early_me_init();
	intel_early_me_uma_size();

	printk(BIOS_DEBUG, "Starting UEFI PEI System Agent\n");

	memset(&sysinfo, 0, sizeof(sysinfo));

	sysinfo.boot_path = pei_data->boot_mode;

	/*
	 * Do not pass MRC data in for recovery mode boot,
	 * Always pass it in for S3 resume.
	 */
	if (!recovery_mode_enabled() || pei_data->boot_mode == 2)
		prepare_mrc_cache(pei_data);

	/* If MRC data is not found we cannot continue S3 resume. */
	if (pei_data->boot_mode == 2 && !pei_data->mrc_input) {
		printk(BIOS_DEBUG, "Giving up in sdram_initialize: No MRC data\n");
		outb(0x6, 0xcf9);
		halt();
	}

	/* Pass console handler in pei_data */
	pei_data->tx_byte = do_putchar;

	/* Locate and call UEFI System Agent binary. */
	entry = cbfs_boot_map_with_leak("mrc.bin", CBFS_TYPE_MRC, NULL);
	if (entry) {
		int rv;
		rv = entry (pei_data);
		if (rv) {
			switch (rv) {
			case -1:
				printk(BIOS_ERR, "PEI version mismatch.\n");
				break;
			case -2:
				printk(BIOS_ERR, "Invalid memory frequency.\n");
				break;
			default:
				printk(BIOS_ERR, "MRC returned %x.\n", rv);
			}
			die("Nonzero MRC return value.\n");
		}
	} else {
		die("UEFI PEI System Agent not found.\n");
	}

#if CONFIG_USBDEBUG_IN_ROMSTAGE
	/* mrc.bin reconfigures USB, so reinit it to have debug */
	usbdebug_init();
#endif

	/* For reference print the System Agent version
	 * after executing the UEFI PEI stage.
	 */
	u32 version = MCHBAR32(0x5034);
	printk(BIOS_DEBUG, "System Agent Version %d.%d.%d Build %d\n",
		version >> 24 , (version >> 16) & 0xff,
		(version >> 8) & 0xff, version & 0xff);

	/* Send ME init done for SandyBridge here.  This is done
	 * inside the SystemAgent binary on IvyBridge. */
	if (BASE_REV_SNB ==
	    (pci_read_config16(PCI_CPU_DEVICE, PCI_DEVICE_ID) & BASE_REV_MASK))
		intel_early_me_init_done(ME_INIT_STATUS_SUCCESS);
	else
		intel_early_me_status();

	report_memory_config();
}

void perform_raminit(int s3resume)
{
	int cbmem_was_initted;
	struct pei_data pei_data;

	/* Prepare USB controller early in S3 resume */
	if (!mainboard_should_reset_usb(s3resume))
		enable_usb_bar();

	mainboard_fill_pei_data(&pei_data);

	post_code(0x3a);
	pei_data.boot_mode = s3resume ? 2 : 0;
	timestamp_add_now(TS_BEFORE_INITRAM);
	sdram_initialize(&pei_data);
	cbmem_was_initted = !cbmem_recovery(s3resume);
	if (!s3resume)
		save_mrc_data(&pei_data);

	if (s3resume && !cbmem_was_initted) {
		/* Failed S3 resume, reset to come up cleanly */
		outb(0x6, 0xcf9);
		halt();
	}
}