// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2011 The Chromium OS Authors. * (C) Copyright 2010,2011 * Graeme Russ, * * Portions from Coreboot mainboard/google/link/romstage.c * Copyright (C) 2007-2010 coresystems GmbH * Copyright (C) 2011 Google Inc. */ #define LOG_CATEGORY UCLASS_RAM #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; #define CMOS_OFFSET_MRC_SEED 152 #define CMOS_OFFSET_MRC_SEED_S3 156 #define CMOS_OFFSET_MRC_SEED_CHK 160 phys_size_t board_get_usable_ram_top(phys_size_t total_size) { return mrc_common_board_get_usable_ram_top(total_size); } int dram_init_banksize(void) { mrc_common_dram_init_banksize(); return 0; } static int read_seed_from_cmos(struct pei_data *pei_data) { u16 c1, c2, checksum, seed_checksum; struct udevice *dev; int ret = 0; ret = uclass_get_device(UCLASS_RTC, 0, &dev); if (ret) { debug("Cannot find RTC: err=%d\n", ret); return -ENODEV; } /* * Read scrambler seeds from CMOS RAM. We don't want to store them in * SPI flash since they change on every boot and that would wear down * the flash too much. So we store these in CMOS and the large MRC * data in SPI flash. */ ret = rtc_read32(dev, CMOS_OFFSET_MRC_SEED, &pei_data->scrambler_seed); if (!ret) { ret = rtc_read32(dev, CMOS_OFFSET_MRC_SEED_S3, &pei_data->scrambler_seed_s3); } if (ret) { debug("Failed to read from RTC %s\n", dev->name); return ret; } debug("Read scrambler seed 0x%08x from CMOS 0x%02x\n", pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED); 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 = rtc_read8(dev, CMOS_OFFSET_MRC_SEED_CHK); seed_checksum |= rtc_read8(dev, CMOS_OFFSET_MRC_SEED_CHK + 1) << 8; if (checksum != seed_checksum) { debug("%s: invalid seed checksum\n", __func__); pei_data->scrambler_seed = 0; pei_data->scrambler_seed_s3 = 0; return -EINVAL; } return 0; } static int prepare_mrc_cache(struct pei_data *pei_data) { struct mrc_data_container *mrc_cache; struct mrc_region entry; int ret; ret = read_seed_from_cmos(pei_data); if (ret) return ret; ret = mrccache_get_region(MRC_TYPE_NORMAL, NULL, &entry); if (ret) return ret; mrc_cache = mrccache_find_current(&entry); if (!mrc_cache) return -ENOENT; pei_data->mrc_input = mrc_cache->data; pei_data->mrc_input_len = mrc_cache->data_size; debug("%s: at %p, size %x checksum %04x\n", __func__, pei_data->mrc_input, pei_data->mrc_input_len, mrc_cache->checksum); return 0; } static int write_seeds_to_cmos(struct pei_data *pei_data) { u16 c1, c2, checksum; struct udevice *dev; int ret = 0; ret = uclass_get_device(UCLASS_RTC, 0, &dev); if (ret) { debug("Cannot find RTC: err=%d\n", ret); return -ENODEV; } /* Save the MRC seed values to CMOS */ rtc_write32(dev, CMOS_OFFSET_MRC_SEED, pei_data->scrambler_seed); debug("Save scrambler seed 0x%08x to CMOS 0x%02x\n", pei_data->scrambler_seed, CMOS_OFFSET_MRC_SEED); rtc_write32(dev, CMOS_OFFSET_MRC_SEED_S3, pei_data->scrambler_seed_s3); 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); rtc_write8(dev, CMOS_OFFSET_MRC_SEED_CHK, checksum & 0xff); rtc_write8(dev, CMOS_OFFSET_MRC_SEED_CHK + 1, (checksum >> 8) & 0xff); return 0; } /* Use this hook to save our SDRAM parameters */ int misc_init_r(void) { int ret; ret = mrccache_save(); if (ret) printf("Unable to save MRC data: %d\n", ret); return 0; } static void post_system_agent_init(struct udevice *dev, struct udevice *me_dev, struct pei_data *pei_data) { uint16_t done; /* * Send ME init done for SandyBridge here. This is done inside the * SystemAgent binary on IvyBridge */ dm_pci_read_config16(dev, PCI_DEVICE_ID, &done); done &= BASE_REV_MASK; if (BASE_REV_SNB == done) intel_early_me_init_done(dev, me_dev, ME_INIT_STATUS_SUCCESS); else intel_me_status(me_dev); /* If PCIe init is skipped, set the PEG clock gating */ if (!pei_data->pcie_init) setbits_le32(MCHBAR_REG(0x7010), 1); } static int recovery_mode_enabled(void) { return false; } static int copy_spd(struct udevice *dev, struct pei_data *peid) { const void *data; int ret; ret = mrc_locate_spd(dev, sizeof(peid->spd_data[0]), &data); if (ret) { log_debug("Could not locate SPD (err=%d)\n", ret); return ret; } memcpy(peid->spd_data[0], data, sizeof(peid->spd_data[0])); return 0; } /** * sdram_find() - Find available memory * * This is a bit complicated since on x86 there are system memory holes all * over the place. We create a list of available memory blocks * * @dev: Northbridge device */ static int sdram_find(struct udevice *dev) { struct memory_info *info = &gd->arch.meminfo; uint32_t tseg_base, uma_size, tolud; uint64_t tom, me_base, touud; uint64_t uma_memory_base = 0; unsigned long long tomk; uint16_t ggc; u32 val; /* Total Memory 2GB example: * * 00000000 0000MB-1992MB 1992MB RAM (writeback) * 7c800000 1992MB-2000MB 8MB TSEG (SMRR) * 7d000000 2000MB-2002MB 2MB GFX GTT (uncached) * 7d200000 2002MB-2034MB 32MB GFX UMA (uncached) * 7f200000 2034MB TOLUD * 7f800000 2040MB MEBASE * 7f800000 2040MB-2048MB 8MB ME UMA (uncached) * 80000000 2048MB TOM * 100000000 4096MB-4102MB 6MB RAM (writeback) * * Total Memory 4GB example: * * 00000000 0000MB-2768MB 2768MB RAM (writeback) * ad000000 2768MB-2776MB 8MB TSEG (SMRR) * ad800000 2776MB-2778MB 2MB GFX GTT (uncached) * ada00000 2778MB-2810MB 32MB GFX UMA (uncached) * afa00000 2810MB TOLUD * ff800000 4088MB MEBASE * ff800000 4088MB-4096MB 8MB ME UMA (uncached) * 100000000 4096MB TOM * 100000000 4096MB-5374MB 1278MB RAM (writeback) * 14fe00000 5368MB TOUUD */ /* Top of Upper Usable DRAM, including remap */ dm_pci_read_config32(dev, TOUUD + 4, &val); touud = (uint64_t)val << 32; dm_pci_read_config32(dev, TOUUD, &val); touud |= val; /* Top of Lower Usable DRAM */ dm_pci_read_config32(dev, TOLUD, &tolud); /* Top of Memory - does not account for any UMA */ dm_pci_read_config32(dev, 0xa4, &val); tom = (uint64_t)val << 32; dm_pci_read_config32(dev, 0xa0, &val); tom |= val; debug("TOUUD %llx TOLUD %08x TOM %llx\n", touud, tolud, tom); /* ME UMA needs excluding if total memory <4GB */ dm_pci_read_config32(dev, 0x74, &val); me_base = (uint64_t)val << 32; dm_pci_read_config32(dev, 0x70, &val); me_base |= val; debug("MEBASE %llx\n", me_base); /* TODO: Get rid of all this shifting by 10 bits */ tomk = tolud >> 10; if (me_base == tolud) { /* ME is from MEBASE-TOM */ uma_size = (tom - me_base) >> 10; /* Increment TOLUD to account for ME as RAM */ tolud += uma_size << 10; /* UMA starts at old TOLUD */ uma_memory_base = tomk * 1024ULL; debug("ME UMA base %llx size %uM\n", me_base, uma_size >> 10); } /* Graphics memory comes next */ dm_pci_read_config16(dev, GGC, &ggc); if (!(ggc & 2)) { debug("IGD decoded, subtracting "); /* Graphics memory */ uma_size = ((ggc >> 3) & 0x1f) * 32 * 1024ULL; debug("%uM UMA", uma_size >> 10); tomk -= uma_size; uma_memory_base = tomk * 1024ULL; /* GTT Graphics Stolen Memory Size (GGMS) */ uma_size = ((ggc >> 8) & 0x3) * 1024ULL; tomk -= uma_size; uma_memory_base = tomk * 1024ULL; debug(" and %uM GTT\n", uma_size >> 10); } /* Calculate TSEG size from its base which must be below GTT */ dm_pci_read_config32(dev, 0xb8, &tseg_base); uma_size = (uma_memory_base - tseg_base) >> 10; tomk -= uma_size; uma_memory_base = tomk * 1024ULL; debug("TSEG base 0x%08x size %uM\n", tseg_base, uma_size >> 10); debug("Available memory below 4GB: %lluM\n", tomk >> 10); /* Report the memory regions */ mrc_add_memory_area(info, 1 << 20, 2 << 28); mrc_add_memory_area(info, (2 << 28) + (2 << 20), 4 << 28); mrc_add_memory_area(info, (4 << 28) + (2 << 20), tseg_base); mrc_add_memory_area(info, 1ULL << 32, touud); /* Add MTRRs for memory */ mtrr_add_request(MTRR_TYPE_WRBACK, 0, 2ULL << 30); mtrr_add_request(MTRR_TYPE_WRBACK, 2ULL << 30, 512 << 20); mtrr_add_request(MTRR_TYPE_WRBACK, 0xaULL << 28, 256 << 20); mtrr_add_request(MTRR_TYPE_UNCACHEABLE, tseg_base, 16 << 20); mtrr_add_request(MTRR_TYPE_UNCACHEABLE, tseg_base + (16 << 20), 32 << 20); /* * If >= 4GB installed then memory from TOLUD to 4GB * is remapped above TOM, TOUUD will account for both */ if (touud > (1ULL << 32ULL)) { debug("Available memory above 4GB: %lluM\n", (touud >> 20) - 4096); } return 0; } static void rcba_config(void) { /* * GFX INTA -> PIRQA (MSI) * D28IP_P3IP WLAN INTA -> PIRQB * D29IP_E1P EHCI1 INTA -> PIRQD * D26IP_E2P EHCI2 INTA -> PIRQF * D31IP_SIP SATA INTA -> PIRQF (MSI) * D31IP_SMIP SMBUS INTB -> PIRQH * D31IP_TTIP THRT INTC -> PIRQA * D27IP_ZIP HDA INTA -> PIRQA (MSI) * * TRACKPAD -> PIRQE (Edge Triggered) * TOUCHSCREEN -> PIRQG (Edge Triggered) */ /* Device interrupt pin register (board specific) */ writel((INTC << D31IP_TTIP) | (NOINT << D31IP_SIP2) | (INTB << D31IP_SMIP) | (INTA << D31IP_SIP), RCB_REG(D31IP)); writel(NOINT << D30IP_PIP, RCB_REG(D30IP)); writel(INTA << D29IP_E1P, RCB_REG(D29IP)); writel(INTA << D28IP_P3IP, RCB_REG(D28IP)); writel(INTA << D27IP_ZIP, RCB_REG(D27IP)); writel(INTA << D26IP_E2P, RCB_REG(D26IP)); writel(NOINT << D25IP_LIP, RCB_REG(D25IP)); writel(NOINT << D22IP_MEI1IP, RCB_REG(D22IP)); /* Device interrupt route registers */ writel(DIR_ROUTE(PIRQB, PIRQH, PIRQA, PIRQC), RCB_REG(D31IR)); writel(DIR_ROUTE(PIRQD, PIRQE, PIRQF, PIRQG), RCB_REG(D29IR)); writel(DIR_ROUTE(PIRQB, PIRQC, PIRQD, PIRQE), RCB_REG(D28IR)); writel(DIR_ROUTE(PIRQA, PIRQH, PIRQA, PIRQB), RCB_REG(D27IR)); writel(DIR_ROUTE(PIRQF, PIRQE, PIRQG, PIRQH), RCB_REG(D26IR)); writel(DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD), RCB_REG(D25IR)); writel(DIR_ROUTE(PIRQA, PIRQB, PIRQC, PIRQD), RCB_REG(D22IR)); /* Enable IOAPIC (generic) */ writew(0x0100, RCB_REG(OIC)); /* PCH BWG says to read back the IOAPIC enable register */ (void)readw(RCB_REG(OIC)); /* Disable unused devices (board specific) */ setbits_le32(RCB_REG(FD), PCH_DISABLE_ALWAYS); } int dram_init(void) { struct pei_data _pei_data __aligned(8) = { .pei_version = PEI_VERSION, .mchbar = MCH_BASE_ADDRESS, .dmibar = DEFAULT_DMIBAR, .epbar = DEFAULT_EPBAR, .pciexbar = CONFIG_PCIE_ECAM_BASE, .smbusbar = SMBUS_IO_BASE, .wdbbar = 0x4000000, .wdbsize = 0x1000, .hpet_address = CONFIG_HPET_ADDRESS, .rcba = DEFAULT_RCBABASE, .pmbase = DEFAULT_PMBASE, .gpiobase = DEFAULT_GPIOBASE, .thermalbase = 0xfed08000, .system_type = 0, /* 0 Mobile, 1 Desktop/Server */ .tseg_size = CONFIG_SMM_TSEG_SIZE, .ts_addresses = { 0x00, 0x00, 0x00, 0x00 }, .ec_present = 1, .ddr3lv_support = 1, /* * 0 = leave channel enabled * 1 = disable dimm 0 on channel * 2 = disable dimm 1 on channel * 3 = disable dimm 0+1 on channel */ .dimm_channel0_disabled = 2, .dimm_channel1_disabled = 2, .max_ddr3_freq = 1600, .usb_port_config = { /* * Empty and onboard Ports 0-7, set to un-used pin * OC3 */ { 0, 3, 0x0000 }, /* P0= Empty */ { 1, 0, 0x0040 }, /* P1= Left USB 1 (OC0) */ { 1, 1, 0x0040 }, /* P2= Left USB 2 (OC1) */ { 1, 3, 0x0040 }, /* P3= SDCARD (no OC) */ { 0, 3, 0x0000 }, /* P4= Empty */ { 1, 3, 0x0040 }, /* P5= WWAN (no OC) */ { 0, 3, 0x0000 }, /* P6= Empty */ { 0, 3, 0x0000 }, /* P7= Empty */ /* * Empty and onboard Ports 8-13, set to un-used pin * OC4 */ { 1, 4, 0x0040 }, /* P8= Camera (no OC) */ { 1, 4, 0x0040 }, /* P9= Bluetooth (no OC) */ { 0, 4, 0x0000 }, /* P10= Empty */ { 0, 4, 0x0000 }, /* P11= Empty */ { 0, 4, 0x0000 }, /* P12= Empty */ { 0, 4, 0x0000 }, /* P13= Empty */ }, }; struct pei_data *pei_data = &_pei_data; struct udevice *dev, *me_dev; int ret; /* We need the pinctrl set up early */ ret = syscon_get_by_driver_data(X86_SYSCON_PINCONF, &dev); if (ret) { debug("%s: Could not get pinconf (ret=%d)\n", __func__, ret); return ret; } ret = uclass_first_device_err(UCLASS_NORTHBRIDGE, &dev); if (ret) { debug("%s: Could not get northbridge (ret=%d)\n", __func__, ret); return ret; } ret = syscon_get_by_driver_data(X86_SYSCON_ME, &me_dev); if (ret) { debug("%s: Could not get ME (ret=%d)\n", __func__, ret); return ret; } ret = copy_spd(dev, pei_data); if (ret) { debug("%s: Could not get SPD (ret=%d)\n", __func__, ret); return ret; } pei_data->boot_mode = gd->arch.pei_boot_mode; debug("Boot mode %d\n", gd->arch.pei_boot_mode); debug("mrc_input %p\n", pei_data->mrc_input); /* * 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 == PEI_BOOT_RESUME) { ret = prepare_mrc_cache(pei_data); if (ret) debug("prepare_mrc_cache failed: %d\n", ret); } /* If MRC data is not found we cannot continue S3 resume. */ if (pei_data->boot_mode == PEI_BOOT_RESUME && !pei_data->mrc_input) { debug("Giving up in sdram_initialize: No MRC data\n"); sysreset_walk_halt(SYSRESET_COLD); } /* Pass console handler in pei_data */ pei_data->tx_byte = sdram_console_tx_byte; /* Wait for ME to be ready */ ret = intel_early_me_init(me_dev); if (ret) { debug("%s: Could not init ME (ret=%d)\n", __func__, ret); return ret; } ret = intel_early_me_uma_size(me_dev); if (ret < 0) { debug("%s: Could not get UMA size (ret=%d)\n", __func__, ret); return ret; } ret = mrc_common_init(dev, pei_data, false); if (ret) { debug("%s: mrc_common_init() failed (ret=%d)\n", __func__, ret); return ret; } ret = sdram_find(dev); if (ret) { debug("%s: sdram_find() failed (ret=%d)\n", __func__, ret); return ret; } gd->ram_size = gd->arch.meminfo.total_32bit_memory; debug("MRC output data length %#x at %p\n", pei_data->mrc_output_len, pei_data->mrc_output); post_system_agent_init(dev, me_dev, pei_data); report_memory_config(); /* S3 resume: don't save scrambler seed or MRC data */ if (pei_data->boot_mode != PEI_BOOT_RESUME) { struct mrc_output *mrc = &gd->arch.mrc[MRC_TYPE_NORMAL]; /* * This will be copied to SDRAM in reserve_arch(), then written * to SPI flash in mrccache_save() */ mrc->buf = (char *)pei_data->mrc_output; mrc->len = pei_data->mrc_output_len; ret = write_seeds_to_cmos(pei_data); if (ret) debug("Failed to write seeds to CMOS: %d\n", ret); } writew(0xCAFE, MCHBAR_REG(SSKPD)); if (ret) return ret; rcba_config(); return 0; }