X-Git-Url: http://wien.tomnetworks.com/gitweb/?p=coreboot.git;a=blobdiff_plain;f=src%2Fnorthbridge%2Fintel%2Fsandybridge%2Fnorthbridge.c;fp=src%2Fnorthbridge%2Fintel%2Fsandybridge%2Fnorthbridge.c;h=e3334c45a646b5ecdf3afe7ded1905aacdbbe74d;hp=0000000000000000000000000000000000000000;hb=00636b0daefc3c499990744226a0e1a316d71731;hpb=4dd3853437a3506880e2879e6640d455778f6413 diff --git a/src/northbridge/intel/sandybridge/northbridge.c b/src/northbridge/intel/sandybridge/northbridge.c new file mode 100644 index 000000000..e3334c45a --- /dev/null +++ b/src/northbridge/intel/sandybridge/northbridge.c @@ -0,0 +1,483 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007-2009 coresystems GmbH + * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "chip.h" +#include "sandybridge.h" + +static int bridge_revision_id = -1; + +int bridge_silicon_revision(void) +{ + if (bridge_revision_id < 0) { + uint8_t stepping = cpuid_eax(1) & 0xf; + uint8_t bridge_id = pci_read_config16( + dev_find_slot(0, PCI_DEVFN(0, 0)), + PCI_DEVICE_ID) & 0xf0; + bridge_revision_id = bridge_id | stepping; + } + return bridge_revision_id; +} + +/* Reserve everything between A segment and 1MB: + * + * 0xa0000 - 0xbffff: legacy VGA + * 0xc0000 - 0xcffff: VGA OPROM (needed by kernel) + * 0xe0000 - 0xfffff: SeaBIOS, if used, otherwise DMI + */ +static const int legacy_hole_base_k = 0xa0000 / 1024; +static const int legacy_hole_size_k = 384; + +int add_northbridge_resources(struct lb_memory *mem) +{ + lb_add_memory_range(mem, LB_MEM_RESERVED, + legacy_hole_base_k * 1024, legacy_hole_size_k * 1024); + +#if CONFIG_CHROMEOS_RAMOOPS + lb_add_memory_range(mem, LB_MEM_RESERVED, + CONFIG_CHROMEOS_RAMOOPS_RAM_START, + CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE); +#endif + + /* Required for SandyBridge sighting 3715511 */ + lb_add_memory_range(mem, LB_MEM_RESERVED, 0x20000000, 0x00200000); + lb_add_memory_range(mem, LB_MEM_RESERVED, 0x40000000, 0x00200000); + + return 0; +} + +static int get_pcie_bar(u32 *base, u32 *len) +{ + device_t dev; + u32 pciexbar_reg; + + *base = 0; + *len = 0; + + dev = dev_find_slot(0, PCI_DEVFN(0, 0)); + if (!dev) + return 0; + + pciexbar_reg = pci_read_config32(dev, PCIEXBAR); + + if (!(pciexbar_reg & (1 << 0))) + return 0; + + switch ((pciexbar_reg >> 1) & 3) { + case 0: // 256MB + *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)); + *len = 256 * 1024 * 1024; + return 1; + case 1: // 128M + *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)); + *len = 128 * 1024 * 1024; + return 1; + case 2: // 64M + *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)|(1 << 26)); + *len = 64 * 1024 * 1024; + return 1; + } + + return 0; +} + +/* IDG memory */ +uint64_t uma_memory_base=0, uma_memory_size=0; + +static void add_fixed_resources(struct device *dev, int index) +{ + struct resource *resource; + u32 pcie_config_base, pcie_config_size; + + printk(BIOS_DEBUG, "Adding UMA memory area base=0x%llx " + "size=0x%llx\n", uma_memory_base, uma_memory_size); + resource = new_resource(dev, index); + resource->base = (resource_t) uma_memory_base; + resource->size = (resource_t) uma_memory_size; + resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; + + /* Clear these values here so they don't get used by MTRR code */ + uma_memory_base = 0; + uma_memory_size = 0; + + if (get_pcie_bar(&pcie_config_base, &pcie_config_size)) { + printk(BIOS_DEBUG, "Adding PCIe config bar base=0x%08x " + "size=0x%x\n", pcie_config_base, pcie_config_size); + resource = new_resource(dev, index+1); + resource->base = (resource_t) pcie_config_base; + resource->size = (resource_t) pcie_config_size; + resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; + } +} + +#if CONFIG_WRITE_HIGH_TABLES==1 +#include +#endif + +static void pci_domain_set_resources(device_t dev) +{ + uint64_t tom, me_base, touud; + uint32_t tseg_base, uma_size, tolud; + uint16_t ggc; + unsigned long long tomk; + + /* 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 */ + touud = pci_read_config32(dev, TOUUD+4); + touud <<= 32; + touud |= pci_read_config32(dev, TOUUD); + + /* Top of Lower Usable DRAM */ + tolud = pci_read_config32(dev, TOLUD); + + /* Top of Memory - does not account for any UMA */ + tom = pci_read_config32(dev, 0xa4); + tom <<= 32; + tom |= pci_read_config32(dev, 0xa0); + + printk(BIOS_DEBUG, "TOUUD 0x%llx TOLUD 0x%08x TOM 0x%llx\n", + touud, tolud, tom); + + /* ME UMA needs excluding if total memory <4GB */ + me_base = pci_read_config32(dev, 0x74); + me_base <<= 32; + me_base |= pci_read_config32(dev, 0x70); + + printk(BIOS_DEBUG, "MEBASE 0x%llx\n", me_base); + + 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; + uma_memory_size = uma_size * 1024ULL; + printk(BIOS_DEBUG, "ME UMA base 0x%llx size %uM\n", + me_base, uma_size >> 10); + } + + /* Graphics memory comes next */ + ggc = pci_read_config16(dev, GGC); + if (!(ggc & 2)) { + printk(BIOS_DEBUG, "IGD decoded, subtracting "); + + /* Graphics memory */ + uma_size = ((ggc >> 3) & 0x1f) * 32 * 1024ULL; + printk(BIOS_DEBUG, "%uM UMA", uma_size >> 10); + tomk -= uma_size; + uma_memory_base = tomk * 1024ULL; + uma_memory_size += uma_size * 1024ULL; + + /* GTT Graphics Stolen Memory Size (GGMS) */ + uma_size = ((ggc >> 8) & 0x3) * 1024ULL; + tomk -= uma_size; + uma_memory_base = tomk * 1024ULL; + uma_memory_size += uma_size * 1024ULL; + printk(BIOS_DEBUG, " and %uM GTT\n", uma_size >> 10); + } + + /* Calculate TSEG size from its base which must be below GTT */ + tseg_base = pci_read_config32(dev, 0xb8); + uma_size = (uma_memory_base - tseg_base) >> 10; + tomk -= uma_size; + uma_memory_base = tomk * 1024ULL; + uma_memory_size += uma_size * 1024ULL; + printk(BIOS_DEBUG, "TSEG base 0x%08x size %uM\n", + tseg_base, uma_size >> 10); + + printk(BIOS_INFO, "Available memory below 4GB: %lluM\n", tomk >> 10); + + /* Report the memory regions */ + ram_resource(dev, 3, 0, legacy_hole_base_k); + ram_resource(dev, 4, legacy_hole_base_k + legacy_hole_size_k, + (tomk - (legacy_hole_base_k + legacy_hole_size_k))); + + /* + * If >= 4GB installed then memory from TOLUD to 4GB + * is remapped above TOM, TOUUD will account for both + */ + touud >>= 10; /* Convert to KB */ + if (touud > 4096 * 1024) { + ram_resource(dev, 5, 4096 * 1024, touud - (4096 * 1024)); + printk(BIOS_INFO, "Available memory above 4GB: %lluM\n", + (touud >> 10) - 4096); + } + + add_fixed_resources(dev, 6); + + assign_resources(dev->link_list); + +#if CONFIG_WRITE_HIGH_TABLES==1 + /* Leave some space for ACPI, PIRQ and MP tables */ + high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE; + high_tables_size = HIGH_MEMORY_SIZE; +#endif +} + + /* TODO We could determine how many PCIe busses we need in + * the bar. For now that number is hardcoded to a max of 64. + * See e7525/northbridge.c for an example. + */ +static struct device_operations pci_domain_ops = { + .read_resources = pci_domain_read_resources, + .set_resources = pci_domain_set_resources, + .enable_resources = NULL, + .init = NULL, + .scan_bus = pci_domain_scan_bus, +#if CONFIG_MMCONF_SUPPORT_DEFAULT + .ops_pci_bus = &pci_ops_mmconf, +#else + .ops_pci_bus = &pci_cf8_conf1, +#endif +}; + +static void mc_read_resources(device_t dev) +{ + struct resource *resource; + + pci_dev_read_resources(dev); + + /* So, this is one of the big mysteries in the coreboot resource + * allocator. This resource should make sure that the address space + * of the PCIe memory mapped config space bar. But it does not. + */ + + /* We use 0xcf as an unused index for our PCIe bar so that we find it again */ + resource = new_resource(dev, 0xcf); + resource->base = DEFAULT_PCIEXBAR; + resource->size = 64 * 1024 * 1024; /* 64MB hard coded PCIe config space */ + resource->flags = + IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED | + IORESOURCE_ASSIGNED; + printk(BIOS_DEBUG, "Adding PCIe enhanced config space BAR 0x%08lx-0x%08lx.\n", + (unsigned long)(resource->base), (unsigned long)(resource->base + resource->size)); +} + +static void mc_set_resources(device_t dev) +{ + struct resource *resource; + + /* Report the PCIe BAR */ + resource = find_resource(dev, 0xcf); + if (resource) { + report_resource_stored(dev, resource, ""); + } + + /* And call the normal set_resources */ + pci_dev_set_resources(dev); +} + +static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device) +{ + if (!vendor || !device) { + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + pci_read_config32(dev, PCI_VENDOR_ID)); + } else { + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + ((device & 0xffff) << 16) | (vendor & 0xffff)); + } +} + +static void northbridge_dmi_init(struct device *dev) +{ + u32 reg32; + + /* Clear error status bits */ + DMIBAR32(0x1c4) = 0xffffffff; + DMIBAR32(0x1d0) = 0xffffffff; + + /* Steps prior to DMI ASPM */ + reg32 = DMIBAR32(0x250); + reg32 &= ~((1 << 22)|(1 << 20)); + reg32 |= (1 << 21); + DMIBAR32(0x250) = reg32; + + reg32 = DMIBAR32(0x238); + reg32 |= (1 << 29); + DMIBAR32(0x238) = reg32; + + if (bridge_silicon_revision() >= SNB_STEP_D0) { + reg32 = DMIBAR32(0x1f8); + reg32 |= (1 << 16); + DMIBAR32(0x1f8) = reg32; + } else if (bridge_silicon_revision() >= SNB_STEP_D1) { + reg32 = DMIBAR32(0x1f8); + reg32 &= ~(1 << 26); + reg32 |= (1 << 16); + DMIBAR32(0x1f8) = reg32; + + reg32 = DMIBAR32(0x1fc); + reg32 |= (1 << 12) | (1 << 23); + DMIBAR32(0x1fc) = reg32; + } + + /* Enable ASPM on SNB link, should happen before PCH link */ + reg32 = DMIBAR32(0xd04); + reg32 |= (1 << 4); + DMIBAR32(0xd04) = reg32; + + reg32 = DMIBAR32(0x88); + reg32 |= (1 << 1) | (1 << 0); + DMIBAR32(0x88) = reg32; +} + +static void northbridge_init(struct device *dev) +{ + u8 bios_reset_cpl; + + northbridge_dmi_init(dev); + + /* + * Set bit 0 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 |= 1; + 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(0x5500) = 0x00100001; +} + +static void northbridge_enable(device_t dev) +{ +#if CONFIG_HAVE_ACPI_RESUME + switch (pci_read_config32(dev, SKPAD)) { + case 0xcafebabe: + printk(BIOS_DEBUG, "Normal boot.\n"); + acpi_slp_type=0; + break; + case 0xcafed00d: + printk(BIOS_DEBUG, "S3 Resume.\n"); + acpi_slp_type=3; + break; + default: + printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n"); + acpi_slp_type=0; + break; + } +#endif +} + +static struct pci_operations intel_pci_ops = { + .set_subsystem = intel_set_subsystem, +}; + +static struct device_operations mc_ops = { + .read_resources = mc_read_resources, + .set_resources = mc_set_resources, + .enable_resources = pci_dev_enable_resources, + .init = northbridge_init, + .enable = northbridge_enable, + .scan_bus = 0, + .ops_pci = &intel_pci_ops, +}; + +static const struct pci_driver mc_driver __pci_driver = { + .ops = &mc_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x0104, /* Sandy bridge */ +}; + +static const struct pci_driver mc_driver_1 __pci_driver = { + .ops = &mc_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x0154, /* Ivy bridge */ +}; + +static void cpu_bus_init(device_t dev) +{ + initialize_cpus(dev->link_list); +} + +static void cpu_bus_noop(device_t dev) +{ +} + +static struct device_operations cpu_bus_ops = { + .read_resources = cpu_bus_noop, + .set_resources = cpu_bus_noop, + .enable_resources = cpu_bus_noop, + .init = cpu_bus_init, + .scan_bus = 0, +}; + +static void enable_dev(device_t dev) +{ + /* Set the operations if it is a special bus type */ + if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) { + dev->ops = &pci_domain_ops; + } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) { + dev->ops = &cpu_bus_ops; + } +} + +struct chip_operations northbridge_intel_sandybridge_ops = { + CHIP_NAME("Intel i7 (Sandybridge) integrated Northbridge") + .enable_dev = enable_dev, +};