| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <commonlib/helpers.h> |
| #include <console/console.h> |
| #include <acpi/acpi.h> |
| #include <stdint.h> |
| #include <delay.h> |
| #include <cpu/intel/haswell/haswell.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_def.h> |
| #include <device/pci_ids.h> |
| #include <device/pci_ops.h> |
| #include <cpu/x86/smm.h> |
| #include <boot/tables.h> |
| |
| #include "chip.h" |
| #include "haswell.h" |
| |
| static int get_pcie_bar(struct device *dev, unsigned int index, u32 *base, u32 *len) |
| { |
| u32 pciexbar_reg, mask; |
| |
| *base = 0; |
| *len = 0; |
| |
| pciexbar_reg = pci_read_config32(dev, index); |
| |
| if (!(pciexbar_reg & (1 << 0))) |
| return 0; |
| |
| switch ((pciexbar_reg >> 1) & 3) { |
| case 0: /* 256MB */ |
| mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28); |
| *base = pciexbar_reg & mask; |
| *len = 256 * 1024 * 1024; |
| return 1; |
| case 1: /* 128M */ |
| mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28); |
| mask |= (1 << 27); |
| *base = pciexbar_reg & mask; |
| *len = 128 * 1024 * 1024; |
| return 1; |
| case 2: /* 64M */ |
| mask = (1UL << 31) | (1 << 30) | (1 << 29) | (1 << 28); |
| mask |= (1 << 27) | (1 << 26); |
| *base = pciexbar_reg & mask; |
| *len = 64 * 1024 * 1024; |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| static const char *northbridge_acpi_name(const struct device *dev) |
| { |
| if (dev->path.type == DEVICE_PATH_DOMAIN) |
| return "PCI0"; |
| |
| if (dev->path.type != DEVICE_PATH_PCI || dev->bus->secondary != 0) |
| return NULL; |
| |
| switch (dev->path.pci.devfn) { |
| case PCI_DEVFN(0, 0): |
| return "MCHC"; |
| } |
| |
| return NULL; |
| } |
| |
| /* |
| * TODO: We could determine how many PCIe busses we need in the bar. |
| * For now, that number is hardcoded to a max of 64. |
| */ |
| static struct device_operations pci_domain_ops = { |
| .read_resources = pci_domain_read_resources, |
| .set_resources = pci_domain_set_resources, |
| .scan_bus = pci_domain_scan_bus, |
| .acpi_name = northbridge_acpi_name, |
| .write_acpi_tables = northbridge_write_acpi_tables, |
| }; |
| |
| static int get_bar(struct device *dev, unsigned int index, u32 *base, u32 *len) |
| { |
| u32 bar = pci_read_config32(dev, index); |
| |
| /* If not enabled don't report it */ |
| if (!(bar & 0x1)) |
| return 0; |
| |
| /* Knock down the enable bit */ |
| *base = bar & ~1; |
| |
| return 1; |
| } |
| |
| /* |
| * There are special BARs that actually are programmed in the MCHBAR. These Intel special |
| * features, but they do consume resources that need to be accounted for. |
| */ |
| static int get_bar_in_mchbar(struct device *dev, unsigned int index, u32 *base, u32 *len) |
| { |
| u32 bar = MCHBAR32(index); |
| |
| /* If not enabled don't report it */ |
| if (!(bar & 0x1)) |
| return 0; |
| |
| /* Knock down the enable bit */ |
| *base = bar & ~1; |
| |
| return 1; |
| } |
| |
| struct fixed_mmio_descriptor { |
| unsigned int index; |
| u32 size; |
| int (*get_resource)(struct device *dev, unsigned int index, u32 *base, u32 *size); |
| const char *description; |
| }; |
| |
| #define SIZE_KB(x) ((x) * 1024) |
| struct fixed_mmio_descriptor mc_fixed_resources[] = { |
| { PCIEXBAR, SIZE_KB(0), get_pcie_bar, "PCIEXBAR" }, |
| { MCHBAR, SIZE_KB(32), get_bar, "MCHBAR" }, |
| { DMIBAR, SIZE_KB(4), get_bar, "DMIBAR" }, |
| { EPBAR, SIZE_KB(4), get_bar, "EPBAR" }, |
| { GDXCBAR, SIZE_KB(4), get_bar_in_mchbar, "GDXCBAR" }, |
| { EDRAMBAR, SIZE_KB(16), get_bar_in_mchbar, "EDRAMBAR" }, |
| }; |
| #undef SIZE_KB |
| |
| /* Add all known fixed MMIO ranges that hang off the host bridge/memory controller device. */ |
| static void mc_add_fixed_mmio_resources(struct device *dev) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(mc_fixed_resources); i++) { |
| u32 base; |
| u32 size; |
| struct resource *resource; |
| unsigned int index; |
| |
| size = mc_fixed_resources[i].size; |
| index = mc_fixed_resources[i].index; |
| if (!mc_fixed_resources[i].get_resource(dev, index, &base, &size)) |
| continue; |
| |
| resource = new_resource(dev, mc_fixed_resources[i].index); |
| resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED | |
| IORESOURCE_RESERVE | IORESOURCE_ASSIGNED; |
| |
| resource->base = base; |
| resource->size = size; |
| printk(BIOS_DEBUG, "%s: Adding %s @ %x 0x%08lx-0x%08lx.\n", |
| __func__, mc_fixed_resources[i].description, index, |
| (unsigned long)base, (unsigned long)(base + size - 1)); |
| } |
| } |
| |
| /* Host Memory Map: |
| * |
| * +--------------------------+ TOUUD |
| * | | |
| * +--------------------------+ 4GiB |
| * | PCI Address Space | |
| * +--------------------------+ TOLUD (also maps into MC address space) |
| * | iGD | |
| * +--------------------------+ BDSM |
| * | GTT | |
| * +--------------------------+ BGSM |
| * | TSEG | |
| * +--------------------------+ TSEGMB |
| * | Usage DRAM | |
| * +--------------------------+ 0 |
| * |
| * Some of the base registers above can be equal, making the size of the regions within 0. |
| * This is because the memory controller internally subtracts the base registers from each |
| * other to determine sizes of the regions. In other words, the memory map regions are always |
| * in a fixed order, no matter what sizes they have. |
| */ |
| |
| struct map_entry { |
| int reg; |
| int is_64_bit; |
| int is_limit; |
| const char *description; |
| }; |
| |
| static void read_map_entry(struct device *dev, struct map_entry *entry, uint64_t *result) |
| { |
| uint64_t value; |
| uint64_t mask; |
| |
| /* All registers have a 1MiB granularity */ |
| mask = ((1ULL << 20) - 1); |
| mask = ~mask; |
| |
| value = 0; |
| |
| if (entry->is_64_bit) { |
| value = pci_read_config32(dev, entry->reg + 4); |
| value <<= 32; |
| } |
| |
| value |= pci_read_config32(dev, entry->reg); |
| value &= mask; |
| |
| if (entry->is_limit) |
| value |= ~mask; |
| |
| *result = value; |
| } |
| |
| #define MAP_ENTRY(reg_, is_64_, is_limit_, desc_) \ |
| { \ |
| .reg = reg_, \ |
| .is_64_bit = is_64_, \ |
| .is_limit = is_limit_, \ |
| .description = desc_, \ |
| } |
| |
| #define MAP_ENTRY_BASE_32(reg_, desc_) MAP_ENTRY(reg_, 0, 0, desc_) |
| #define MAP_ENTRY_BASE_64(reg_, desc_) MAP_ENTRY(reg_, 1, 0, desc_) |
| #define MAP_ENTRY_LIMIT_64(reg_, desc_) MAP_ENTRY(reg_, 1, 1, desc_) |
| |
| enum { |
| TOM_REG, |
| TOUUD_REG, |
| MESEG_BASE_REG, |
| MESEG_LIMIT_REG, |
| REMAP_BASE_REG, |
| REMAP_LIMIT_REG, |
| TOLUD_REG, |
| BGSM_REG, |
| BDSM_REG, |
| TSEG_REG, |
| /* Must be last */ |
| NUM_MAP_ENTRIES, |
| }; |
| |
| static struct map_entry memory_map[NUM_MAP_ENTRIES] = { |
| [TOM_REG] = MAP_ENTRY_BASE_64(TOM, "TOM"), |
| [TOUUD_REG] = MAP_ENTRY_BASE_64(TOUUD, "TOUUD"), |
| [MESEG_BASE_REG] = MAP_ENTRY_BASE_64(MESEG_BASE, "MESEG_BASE"), |
| [MESEG_LIMIT_REG] = MAP_ENTRY_LIMIT_64(MESEG_LIMIT, "MESEG_LIMIT"), |
| [REMAP_BASE_REG] = MAP_ENTRY_BASE_64(REMAPBASE, "REMAP_BASE"), |
| [REMAP_LIMIT_REG] = MAP_ENTRY_LIMIT_64(REMAPLIMIT, "REMAP_LIMIT"), |
| [TOLUD_REG] = MAP_ENTRY_BASE_32(TOLUD, "TOLUD"), |
| [BDSM_REG] = MAP_ENTRY_BASE_32(BDSM, "BDSM"), |
| [BGSM_REG] = MAP_ENTRY_BASE_32(BGSM, "BGSM"), |
| [TSEG_REG] = MAP_ENTRY_BASE_32(TSEG, "TSEGMB"), |
| }; |
| |
| static void mc_read_map_entries(struct device *dev, uint64_t *values) |
| { |
| int i; |
| for (i = 0; i < NUM_MAP_ENTRIES; i++) { |
| read_map_entry(dev, &memory_map[i], &values[i]); |
| } |
| } |
| |
| static void mc_report_map_entries(struct device *dev, uint64_t *values) |
| { |
| int i; |
| for (i = 0; i < NUM_MAP_ENTRIES; i++) { |
| printk(BIOS_DEBUG, "MC MAP: %s: 0x%llx\n", |
| memory_map[i].description, values[i]); |
| } |
| /* One can validate the BDSM and BGSM against the GGC */ |
| printk(BIOS_DEBUG, "MC MAP: GGC: 0x%x\n", pci_read_config16(dev, GGC)); |
| } |
| |
| static void mc_add_dram_resources(struct device *dev, int *resource_cnt) |
| { |
| unsigned long base_k, size_k, touud_k, index; |
| struct resource *resource; |
| uint64_t mc_values[NUM_MAP_ENTRIES]; |
| |
| /* Read in the MAP registers and report their values */ |
| mc_read_map_entries(dev, &mc_values[0]); |
| mc_report_map_entries(dev, &mc_values[0]); |
| |
| /* |
| * These are the host memory ranges that should be added: |
| * - 0 -> 0xa0000: cacheable |
| * - 0xc0000 -> TSEG: cacheable |
| * - TSEG -> BGSM: cacheable with standard MTRRs and reserved |
| * - BGSM -> TOLUD: not cacheable with standard MTRRs and reserved |
| * - 4GiB -> TOUUD: cacheable |
| * |
| * The default SMRAM space is reserved so that the range doesn't have to be saved |
| * during S3 Resume. Once marked reserved the OS cannot use the memory. This is a |
| * bit of an odd place to reserve the region, but the CPU devices don't have |
| * dev_ops->read_resources() called on them. |
| * |
| * The range 0xa0000 -> 0xc0000 does not have any resources associated with it to |
| * handle legacy VGA memory. If this range is not omitted the mtrr code will setup |
| * the area as cacheable, causing VGA access to not work. |
| * |
| * The TSEG region is mapped as cacheable so that one can perform SMRAM relocation |
| * faster. Once the SMRR is enabled, the SMRR takes precedence over the existing |
| * MTRRs covering this region. |
| * |
| * It should be noted that cacheable entry types need to be added in order. The reason |
| * is that the current MTRR code assumes this and falls over itself if it isn't. |
| * |
| * The resource index starts low and should not meet or exceed PCI_BASE_ADDRESS_0. |
| */ |
| index = *resource_cnt; |
| |
| /* 0 - > 0xa0000 */ |
| base_k = 0; |
| size_k = (0xa0000 >> 10) - base_k; |
| ram_resource(dev, index++, base_k, size_k); |
| |
| /* 0xc0000 -> TSEG */ |
| base_k = 0xc0000 >> 10; |
| size_k = (unsigned long)(mc_values[TSEG_REG] >> 10) - base_k; |
| ram_resource(dev, index++, base_k, size_k); |
| |
| /* TSEG -> BGSM */ |
| resource = new_resource(dev, index++); |
| resource->base = mc_values[TSEG_REG]; |
| resource->size = mc_values[BGSM_REG] - resource->base; |
| resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED | |
| IORESOURCE_RESERVE | IORESOURCE_ASSIGNED | IORESOURCE_CACHEABLE; |
| |
| /* BGSM -> TOLUD. If the IGD is disabled, BGSM can equal TOLUD. */ |
| if (mc_values[BGSM_REG] != mc_values[TOLUD_REG]) { |
| resource = new_resource(dev, index++); |
| resource->base = mc_values[BGSM_REG]; |
| resource->size = mc_values[TOLUD_REG] - resource->base; |
| resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED | |
| IORESOURCE_RESERVE | IORESOURCE_ASSIGNED; |
| } |
| |
| /* 4GiB -> TOUUD */ |
| base_k = 4096 * 1024; /* 4GiB */ |
| touud_k = mc_values[TOUUD_REG] >> 10; |
| size_k = touud_k - base_k; |
| if (touud_k > base_k) |
| ram_resource(dev, index++, base_k, size_k); |
| |
| /* Reserve everything between A segment and 1MB: |
| * |
| * 0xa0000 - 0xbffff: Legacy VGA |
| * 0xc0000 - 0xfffff: RAM |
| */ |
| mmio_resource(dev, index++, (0xa0000 >> 10), (0xc0000 - 0xa0000) >> 10); |
| reserved_ram_resource(dev, index++, (0xc0000 >> 10), (0x100000 - 0xc0000) >> 10); |
| |
| #if CONFIG(CHROMEOS_RAMOOPS) |
| reserved_ram_resource(dev, index++, |
| CONFIG_CHROMEOS_RAMOOPS_RAM_START >> 10, |
| CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE >> 10); |
| #endif |
| *resource_cnt = index; |
| } |
| |
| static void mc_read_resources(struct device *dev) |
| { |
| int index = 0; |
| const bool vtd_capable = !(pci_read_config32(dev, CAPID0_A) & VTD_DISABLE); |
| |
| /* Read standard PCI resources */ |
| pci_dev_read_resources(dev); |
| |
| /* Add all fixed MMIO resources */ |
| mc_add_fixed_mmio_resources(dev); |
| |
| /* Add VT-d MMIO resources, if capable */ |
| if (vtd_capable) { |
| mmio_resource(dev, index++, GFXVT_BASE_ADDRESS / KiB, GFXVT_BASE_SIZE / KiB); |
| mmio_resource(dev, index++, VTVC0_BASE_ADDRESS / KiB, VTVC0_BASE_SIZE / KiB); |
| } |
| |
| /* Calculate and add DRAM resources */ |
| mc_add_dram_resources(dev, &index); |
| } |
| |
| /* |
| * The Mini-HD audio device is disabled whenever the IGD is. This is because it provides |
| * audio over the integrated graphics port(s), which requires the IGD to be functional. |
| */ |
| static void disable_devices(void) |
| { |
| static const struct { |
| const unsigned int devfn; |
| const u32 mask; |
| const char *const name; |
| } nb_devs[] = { |
| { PCI_DEVFN(1, 2), DEVEN_D1F2EN, "PEG12" }, |
| { PCI_DEVFN(1, 1), DEVEN_D1F1EN, "PEG11" }, |
| { PCI_DEVFN(1, 0), DEVEN_D1F0EN, "PEG10" }, |
| { PCI_DEVFN(2, 0), DEVEN_D2EN | DEVEN_D3EN, "IGD" }, |
| { PCI_DEVFN(3, 0), DEVEN_D3EN, "Mini-HD audio" }, |
| { PCI_DEVFN(4, 0), DEVEN_D4EN, "\"device 4\"" }, |
| { PCI_DEVFN(7, 0), DEVEN_D7EN, "\"device 7\"" }, |
| }; |
| |
| struct device *host_dev = pcidev_on_root(0, 0); |
| u32 deven; |
| size_t i; |
| |
| if (!host_dev) |
| return; |
| |
| deven = pci_read_config32(host_dev, DEVEN); |
| |
| for (i = 0; i < ARRAY_SIZE(nb_devs); i++) { |
| struct device *dev = pcidev_path_on_root(nb_devs[i].devfn); |
| if (!dev || !dev->enabled) { |
| printk(BIOS_DEBUG, "Disabling %s.\n", nb_devs[i].name); |
| deven &= ~nb_devs[i].mask; |
| } |
| } |
| |
| pci_write_config32(host_dev, DEVEN, deven); |
| } |
| |
| static void northbridge_init(struct device *dev) |
| { |
| u8 bios_reset_cpl, pair; |
| |
| /* Enable Power Aware Interrupt Routing. */ |
| pair = MCHBAR8(INTRDIRCTL); |
| pair &= ~0x7; /* Clear 2:0 */ |
| pair |= 0x4; /* Fixed Priority */ |
| MCHBAR8(INTRDIRCTL) = pair; |
| |
| disable_devices(); |
| |
| /* |
| * Set bits 0 + 1 of BIOS_RESET_CPL to indicate to the CPU |
| * that BIOS has initialized memory and power management. |
| */ |
| bios_reset_cpl = MCHBAR8(BIOS_RESET_CPL); |
| bios_reset_cpl |= 3; |
| MCHBAR8(BIOS_RESET_CPL) = bios_reset_cpl; |
| printk(BIOS_DEBUG, "Set BIOS_RESET_CPL\n"); |
| |
| /* Configure turbo power limits 1ms after reset complete bit. */ |
| mdelay(1); |
| set_power_limits(28); |
| |
| /* Set here before graphics PM init. */ |
| MCHBAR32(MMIO_PAVP_MSG) = 0x00100001; |
| } |
| |
| static struct pci_operations intel_pci_ops = { |
| .set_subsystem = pci_dev_set_subsystem, |
| }; |
| |
| static struct device_operations mc_ops = { |
| .read_resources = mc_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = northbridge_init, |
| .acpi_fill_ssdt = generate_cpu_entries, |
| .ops_pci = &intel_pci_ops, |
| }; |
| |
| static const unsigned short mc_pci_device_ids[] = { |
| 0x0c00, /* Desktop */ |
| 0x0c04, /* Mobile */ |
| 0x0a04, /* ULT */ |
| 0x0c08, /* Server */ |
| 0 |
| }; |
| |
| static const struct pci_driver mc_driver_hsw __pci_driver = { |
| .ops = &mc_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = mc_pci_device_ids, |
| }; |
| |
| static struct device_operations cpu_bus_ops = { |
| .read_resources = noop_read_resources, |
| .set_resources = noop_set_resources, |
| .init = mp_cpu_bus_init, |
| }; |
| |
| static void enable_dev(struct device *dev) |
| { |
| /* Set the operations if it is a special bus type. */ |
| if (dev->path.type == DEVICE_PATH_DOMAIN) { |
| dev->ops = &pci_domain_ops; |
| } else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER) { |
| dev->ops = &cpu_bus_ops; |
| } |
| } |
| |
| struct chip_operations northbridge_intel_haswell_ops = { |
| CHIP_NAME("Intel i7 (Haswell) integrated Northbridge") |
| .enable_dev = enable_dev, |
| }; |