1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2011 The Chromium OS Authors.
4 * (C) Copyright 2010,2011
5 * Graeme Russ, <graeme.russ@gmail.com>
7 * Portions from Coreboot mainboard/google/link/romstage.c
8 * Copyright (C) 2007-2010 coresystems GmbH
9 * Copyright (C) 2011 Google Inc.
19 #include <spi_flash.h>
22 #include <asm/processor.h>
24 #include <asm/global_data.h>
25 #include <asm/intel_regs.h>
26 #include <asm/mrccache.h>
27 #include <asm/mrc_common.h>
30 #include <asm/report_platform.h>
31 #include <asm/arch/me.h>
32 #include <asm/arch/pei_data.h>
33 #include <asm/arch/pch.h>
35 #include <asm/arch/sandybridge.h>
37 DECLARE_GLOBAL_DATA_PTR;
39 #define CMOS_OFFSET_MRC_SEED 152
40 #define CMOS_OFFSET_MRC_SEED_S3 156
41 #define CMOS_OFFSET_MRC_SEED_CHK 160
43 ulong board_get_usable_ram_top(ulong total_size)
45 return mrc_common_board_get_usable_ram_top(total_size);
48 int dram_init_banksize(void)
50 mrc_common_dram_init_banksize();
55 static int read_seed_from_cmos(struct pei_data *pei_data)
57 u16 c1, c2, checksum, seed_checksum;
61 ret = uclass_get_device(UCLASS_RTC, 0, &dev);
63 debug("Cannot find RTC: err=%d\n", ret);
68 * Read scrambler seeds from CMOS RAM. We don't want to store them in
69 * SPI flash since they change on every boot and that would wear down
70 * the flash too much. So we store these in CMOS and the large MRC
73 ret = rtc_read32(dev, CMOS_OFFSET_MRC_SEED, &pei_data->scrambler_seed);
75 ret = rtc_read32(dev, CMOS_OFFSET_MRC_SEED_S3,
76 &pei_data->scrambler_seed_s3);
79 debug("Failed to read from RTC %s\n", dev->name);
83 debug("Read scrambler seed 0x%08x from CMOS 0x%02x\n",
84 pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED);
85 debug("Read S3 scrambler seed 0x%08x from CMOS 0x%02x\n",
86 pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3);
88 /* Compute seed checksum and compare */
89 c1 = compute_ip_checksum((u8 *)&pei_data->scrambler_seed,
91 c2 = compute_ip_checksum((u8 *)&pei_data->scrambler_seed_s3,
93 checksum = add_ip_checksums(sizeof(u32), c1, c2);
95 seed_checksum = rtc_read8(dev, CMOS_OFFSET_MRC_SEED_CHK);
96 seed_checksum |= rtc_read8(dev, CMOS_OFFSET_MRC_SEED_CHK + 1) << 8;
98 if (checksum != seed_checksum) {
99 debug("%s: invalid seed checksum\n", __func__);
100 pei_data->scrambler_seed = 0;
101 pei_data->scrambler_seed_s3 = 0;
108 static int prepare_mrc_cache(struct pei_data *pei_data)
110 struct mrc_data_container *mrc_cache;
111 struct mrc_region entry;
114 ret = read_seed_from_cmos(pei_data);
117 ret = mrccache_get_region(NULL, &entry);
120 mrc_cache = mrccache_find_current(&entry);
124 pei_data->mrc_input = mrc_cache->data;
125 pei_data->mrc_input_len = mrc_cache->data_size;
126 debug("%s: at %p, size %x checksum %04x\n", __func__,
127 pei_data->mrc_input, pei_data->mrc_input_len,
128 mrc_cache->checksum);
133 static int write_seeds_to_cmos(struct pei_data *pei_data)
135 u16 c1, c2, checksum;
139 ret = uclass_get_device(UCLASS_RTC, 0, &dev);
141 debug("Cannot find RTC: err=%d\n", ret);
145 /* Save the MRC seed values to CMOS */
146 rtc_write32(dev, CMOS_OFFSET_MRC_SEED, pei_data->scrambler_seed);
147 debug("Save scrambler seed 0x%08x to CMOS 0x%02x\n",
148 pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED);
150 rtc_write32(dev, CMOS_OFFSET_MRC_SEED_S3, pei_data->scrambler_seed_s3);
151 debug("Save s3 scrambler seed 0x%08x to CMOS 0x%02x\n",
152 pei_data->scrambler_seed_s3, CMOS_OFFSET_MRC_SEED_S3);
154 /* Save a simple checksum of the seed values */
155 c1 = compute_ip_checksum((u8 *)&pei_data->scrambler_seed,
157 c2 = compute_ip_checksum((u8 *)&pei_data->scrambler_seed_s3,
159 checksum = add_ip_checksums(sizeof(u32), c1, c2);
161 rtc_write8(dev, CMOS_OFFSET_MRC_SEED_CHK, checksum & 0xff);
162 rtc_write8(dev, CMOS_OFFSET_MRC_SEED_CHK + 1, (checksum >> 8) & 0xff);
167 /* Use this hook to save our SDRAM parameters */
168 int misc_init_r(void)
172 ret = mrccache_save();
174 printf("Unable to save MRC data: %d\n", ret);
179 static void post_system_agent_init(struct udevice *dev, struct udevice *me_dev,
180 struct pei_data *pei_data)
185 * Send ME init done for SandyBridge here. This is done inside the
186 * SystemAgent binary on IvyBridge
188 dm_pci_read_config16(dev, PCI_DEVICE_ID, &done);
189 done &= BASE_REV_MASK;
190 if (BASE_REV_SNB == done)
191 intel_early_me_init_done(dev, me_dev, ME_INIT_STATUS_SUCCESS);
193 intel_me_status(me_dev);
195 /* If PCIe init is skipped, set the PEG clock gating */
196 if (!pei_data->pcie_init)
197 setbits_le32(MCHBAR_REG(0x7010), 1);
200 static int recovery_mode_enabled(void)
205 static int copy_spd(struct udevice *dev, struct pei_data *peid)
210 ret = mrc_locate_spd(dev, sizeof(peid->spd_data[0]), &data);
212 debug("%s: Could not locate SPD (ret=%d)\n", __func__, ret);
216 memcpy(peid->spd_data[0], data, sizeof(peid->spd_data[0]));
222 * sdram_find() - Find available memory
224 * This is a bit complicated since on x86 there are system memory holes all
225 * over the place. We create a list of available memory blocks
227 * @dev: Northbridge device
229 static int sdram_find(struct udevice *dev)
231 struct memory_info *info = &gd->arch.meminfo;
232 uint32_t tseg_base, uma_size, tolud;
233 uint64_t tom, me_base, touud;
234 uint64_t uma_memory_base = 0;
235 unsigned long long tomk;
239 /* Total Memory 2GB example:
241 * 00000000 0000MB-1992MB 1992MB RAM (writeback)
242 * 7c800000 1992MB-2000MB 8MB TSEG (SMRR)
243 * 7d000000 2000MB-2002MB 2MB GFX GTT (uncached)
244 * 7d200000 2002MB-2034MB 32MB GFX UMA (uncached)
245 * 7f200000 2034MB TOLUD
246 * 7f800000 2040MB MEBASE
247 * 7f800000 2040MB-2048MB 8MB ME UMA (uncached)
248 * 80000000 2048MB TOM
249 * 100000000 4096MB-4102MB 6MB RAM (writeback)
251 * Total Memory 4GB example:
253 * 00000000 0000MB-2768MB 2768MB RAM (writeback)
254 * ad000000 2768MB-2776MB 8MB TSEG (SMRR)
255 * ad800000 2776MB-2778MB 2MB GFX GTT (uncached)
256 * ada00000 2778MB-2810MB 32MB GFX UMA (uncached)
257 * afa00000 2810MB TOLUD
258 * ff800000 4088MB MEBASE
259 * ff800000 4088MB-4096MB 8MB ME UMA (uncached)
260 * 100000000 4096MB TOM
261 * 100000000 4096MB-5374MB 1278MB RAM (writeback)
262 * 14fe00000 5368MB TOUUD
265 /* Top of Upper Usable DRAM, including remap */
266 dm_pci_read_config32(dev, TOUUD + 4, &val);
267 touud = (uint64_t)val << 32;
268 dm_pci_read_config32(dev, TOUUD, &val);
271 /* Top of Lower Usable DRAM */
272 dm_pci_read_config32(dev, TOLUD, &tolud);
274 /* Top of Memory - does not account for any UMA */
275 dm_pci_read_config32(dev, 0xa4, &val);
276 tom = (uint64_t)val << 32;
277 dm_pci_read_config32(dev, 0xa0, &val);
280 debug("TOUUD %llx TOLUD %08x TOM %llx\n", touud, tolud, tom);
282 /* ME UMA needs excluding if total memory <4GB */
283 dm_pci_read_config32(dev, 0x74, &val);
284 me_base = (uint64_t)val << 32;
285 dm_pci_read_config32(dev, 0x70, &val);
288 debug("MEBASE %llx\n", me_base);
290 /* TODO: Get rid of all this shifting by 10 bits */
292 if (me_base == tolud) {
293 /* ME is from MEBASE-TOM */
294 uma_size = (tom - me_base) >> 10;
295 /* Increment TOLUD to account for ME as RAM */
296 tolud += uma_size << 10;
297 /* UMA starts at old TOLUD */
298 uma_memory_base = tomk * 1024ULL;
299 debug("ME UMA base %llx size %uM\n", me_base, uma_size >> 10);
302 /* Graphics memory comes next */
303 dm_pci_read_config16(dev, GGC, &ggc);
305 debug("IGD decoded, subtracting ");
307 /* Graphics memory */
308 uma_size = ((ggc >> 3) & 0x1f) * 32 * 1024ULL;
309 debug("%uM UMA", uma_size >> 10);
311 uma_memory_base = tomk * 1024ULL;
313 /* GTT Graphics Stolen Memory Size (GGMS) */
314 uma_size = ((ggc >> 8) & 0x3) * 1024ULL;
316 uma_memory_base = tomk * 1024ULL;
317 debug(" and %uM GTT\n", uma_size >> 10);
320 /* Calculate TSEG size from its base which must be below GTT */
321 dm_pci_read_config32(dev, 0xb8, &tseg_base);
322 uma_size = (uma_memory_base - tseg_base) >> 10;
324 uma_memory_base = tomk * 1024ULL;
325 debug("TSEG base 0x%08x size %uM\n", tseg_base, uma_size >> 10);
327 debug("Available memory below 4GB: %lluM\n", tomk >> 10);
329 /* Report the memory regions */
330 mrc_add_memory_area(info, 1 << 20, 2 << 28);
331 mrc_add_memory_area(info, (2 << 28) + (2 << 20), 4 << 28);
332 mrc_add_memory_area(info, (4 << 28) + (2 << 20), tseg_base);
333 mrc_add_memory_area(info, 1ULL << 32, touud);
335 /* Add MTRRs for memory */
336 mtrr_add_request(MTRR_TYPE_WRBACK, 0, 2ULL << 30);
337 mtrr_add_request(MTRR_TYPE_WRBACK, 2ULL << 30, 512 << 20);
338 mtrr_add_request(MTRR_TYPE_WRBACK, 0xaULL << 28, 256 << 20);
339 mtrr_add_request(MTRR_TYPE_UNCACHEABLE, tseg_base, 16 << 20);
340 mtrr_add_request(MTRR_TYPE_UNCACHEABLE, tseg_base + (16 << 20),
344 * If >= 4GB installed then memory from TOLUD to 4GB
345 * is remapped above TOM, TOUUD will account for both
347 if (touud > (1ULL << 32ULL)) {
348 debug("Available memory above 4GB: %lluM\n",
349 (touud >> 20) - 4096);
355 static void rcba_config(void)
358 * GFX INTA -> PIRQA (MSI)
359 * D28IP_P3IP WLAN INTA -> PIRQB
360 * D29IP_E1P EHCI1 INTA -> PIRQD
361 * D26IP_E2P EHCI2 INTA -> PIRQF
362 * D31IP_SIP SATA INTA -> PIRQF (MSI)
363 * D31IP_SMIP SMBUS INTB -> PIRQH
364 * D31IP_TTIP THRT INTC -> PIRQA
365 * D27IP_ZIP HDA INTA -> PIRQA (MSI)
367 * TRACKPAD -> PIRQE (Edge Triggered)
368 * TOUCHSCREEN -> PIRQG (Edge Triggered)
371 /* Device interrupt pin register (board specific) */
372 writel((INTC << D31IP_TTIP) | (NOINT << D31IP_SIP2) |
373 (INTB << D31IP_SMIP) | (INTA << D31IP_SIP), RCB_REG(D31IP));
374 writel(NOINT << D30IP_PIP, RCB_REG(D30IP));
375 writel(INTA << D29IP_E1P, RCB_REG(D29IP));
376 writel(INTA << D28IP_P3IP, RCB_REG(D28IP));
377 writel(INTA << D27IP_ZIP, RCB_REG(D27IP));
378 writel(INTA << D26IP_E2P, RCB_REG(D26IP));
379 writel(NOINT << D25IP_LIP, RCB_REG(D25IP));
380 writel(NOINT << D22IP_MEI1IP, RCB_REG(D22IP));
382 /* Device interrupt route registers */
383 writel(DIR_ROUTE(PIRQB, PIRQH, PIRQA, PIRQC), RCB_REG(D31IR));
384 writel(DIR_ROUTE(PIRQD, PIRQE, PIRQF, PIRQG), RCB_REG(D29IR));
385 writel(DIR_ROUTE(PIRQB, PIRQC, PIRQD, PIRQE), RCB_REG(D28IR));
386 writel(DIR_ROUTE(PIRQA, PIRQH, PIRQA, PIRQB), RCB_REG(D27IR));
387 writel(DIR_ROUTE(PIRQF, PIRQE, PIRQG, PIRQH), RCB_REG(D26IR));
388 writel(DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD), RCB_REG(D25IR));
389 writel(DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD), RCB_REG(D22IR));
391 /* Enable IOAPIC (generic) */
392 writew(0x0100, RCB_REG(OIC));
393 /* PCH BWG says to read back the IOAPIC enable register */
394 (void)readw(RCB_REG(OIC));
396 /* Disable unused devices (board specific) */
397 setbits_le32(RCB_REG(FD), PCH_DISABLE_ALWAYS);
402 struct pei_data _pei_data __aligned(8) = {
403 .pei_version = PEI_VERSION,
404 .mchbar = MCH_BASE_ADDRESS,
405 .dmibar = DEFAULT_DMIBAR,
406 .epbar = DEFAULT_EPBAR,
407 .pciexbar = CONFIG_PCIE_ECAM_BASE,
408 .smbusbar = SMBUS_IO_BASE,
411 .hpet_address = CONFIG_HPET_ADDRESS,
412 .rcba = DEFAULT_RCBABASE,
413 .pmbase = DEFAULT_PMBASE,
414 .gpiobase = DEFAULT_GPIOBASE,
415 .thermalbase = 0xfed08000,
416 .system_type = 0, /* 0 Mobile, 1 Desktop/Server */
417 .tseg_size = CONFIG_SMM_TSEG_SIZE,
418 .ts_addresses = { 0x00, 0x00, 0x00, 0x00 },
422 * 0 = leave channel enabled
423 * 1 = disable dimm 0 on channel
424 * 2 = disable dimm 1 on channel
425 * 3 = disable dimm 0+1 on channel
427 .dimm_channel0_disabled = 2,
428 .dimm_channel1_disabled = 2,
429 .max_ddr3_freq = 1600,
432 * Empty and onboard Ports 0-7, set to un-used pin
435 { 0, 3, 0x0000 }, /* P0= Empty */
436 { 1, 0, 0x0040 }, /* P1= Left USB 1 (OC0) */
437 { 1, 1, 0x0040 }, /* P2= Left USB 2 (OC1) */
438 { 1, 3, 0x0040 }, /* P3= SDCARD (no OC) */
439 { 0, 3, 0x0000 }, /* P4= Empty */
440 { 1, 3, 0x0040 }, /* P5= WWAN (no OC) */
441 { 0, 3, 0x0000 }, /* P6= Empty */
442 { 0, 3, 0x0000 }, /* P7= Empty */
444 * Empty and onboard Ports 8-13, set to un-used pin
447 { 1, 4, 0x0040 }, /* P8= Camera (no OC) */
448 { 1, 4, 0x0040 }, /* P9= Bluetooth (no OC) */
449 { 0, 4, 0x0000 }, /* P10= Empty */
450 { 0, 4, 0x0000 }, /* P11= Empty */
451 { 0, 4, 0x0000 }, /* P12= Empty */
452 { 0, 4, 0x0000 }, /* P13= Empty */
455 struct pei_data *pei_data = &_pei_data;
456 struct udevice *dev, *me_dev;
459 /* We need the pinctrl set up early */
460 ret = syscon_get_by_driver_data(X86_SYSCON_PINCONF, &dev);
462 debug("%s: Could not get pinconf (ret=%d)\n", __func__, ret);
466 ret = uclass_first_device_err(UCLASS_NORTHBRIDGE, &dev);
468 debug("%s: Could not get northbridge (ret=%d)\n", __func__,
472 ret = syscon_get_by_driver_data(X86_SYSCON_ME, &me_dev);
474 debug("%s: Could not get ME (ret=%d)\n", __func__, ret);
477 ret = copy_spd(dev, pei_data);
479 debug("%s: Could not get SPD (ret=%d)\n", __func__, ret);
482 pei_data->boot_mode = gd->arch.pei_boot_mode;
483 debug("Boot mode %d\n", gd->arch.pei_boot_mode);
484 debug("mrc_input %p\n", pei_data->mrc_input);
487 * Do not pass MRC data in for recovery mode boot,
488 * Always pass it in for S3 resume.
490 if (!recovery_mode_enabled() ||
491 pei_data->boot_mode == PEI_BOOT_RESUME) {
492 ret = prepare_mrc_cache(pei_data);
494 debug("prepare_mrc_cache failed: %d\n", ret);
497 /* If MRC data is not found we cannot continue S3 resume. */
498 if (pei_data->boot_mode == PEI_BOOT_RESUME && !pei_data->mrc_input) {
499 debug("Giving up in sdram_initialize: No MRC data\n");
503 /* Pass console handler in pei_data */
504 pei_data->tx_byte = sdram_console_tx_byte;
506 /* Wait for ME to be ready */
507 ret = intel_early_me_init(me_dev);
509 debug("%s: Could not init ME (ret=%d)\n", __func__, ret);
512 ret = intel_early_me_uma_size(me_dev);
514 debug("%s: Could not get UMA size (ret=%d)\n", __func__, ret);
518 ret = mrc_common_init(dev, pei_data, false);
520 debug("%s: mrc_common_init() failed (ret=%d)\n", __func__, ret);
524 ret = sdram_find(dev);
526 debug("%s: sdram_find() failed (ret=%d)\n", __func__, ret);
529 gd->ram_size = gd->arch.meminfo.total_32bit_memory;
531 debug("MRC output data length %#x at %p\n", pei_data->mrc_output_len,
532 pei_data->mrc_output);
534 post_system_agent_init(dev, me_dev, pei_data);
535 report_memory_config();
537 /* S3 resume: don't save scrambler seed or MRC data */
538 if (pei_data->boot_mode != PEI_BOOT_RESUME) {
540 * This will be copied to SDRAM in reserve_arch(), then written
541 * to SPI flash in mrccache_save()
543 gd->arch.mrc_output = (char *)pei_data->mrc_output;
544 gd->arch.mrc_output_len = pei_data->mrc_output_len;
545 ret = write_seeds_to_cmos(pei_data);
547 debug("Failed to write seeds to CMOS: %d\n", ret);
550 writew(0xCAFE, MCHBAR_REG(SSKPD));