| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2007-2009 coresystems GmbH |
| * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. |
| * Copyright (C) 2013-2014 Sage Electronic Engineering, LLC. |
| * |
| * 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 <arch/acpi.h> |
| #include <device/pci_ops.h> |
| #include <stdint.h> |
| #include <delay.h> |
| #include <cpu/intel/fsp_model_406dx/model_406dx.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <stdlib.h> |
| #include <cpu/cpu.h> |
| #include <drivers/intel/fsp1_0/fsp_util.h> |
| #include <cpu/x86/lapic.h> |
| |
| #include "chip.h" |
| #include "northbridge.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( |
| pcidev_on_root(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; |
| |
| static int get_pcie_bar(u32 *base) |
| { |
| struct device *dev; |
| u32 pciexbar_reg; |
| |
| *base = 0; |
| |
| dev = pcidev_on_root(0, 0); |
| if (!dev) |
| return 0; |
| |
| pciexbar_reg = sideband_read(B_UNIT, BECREG); |
| |
| if (!(pciexbar_reg & (1 << 0))) |
| return 0; |
| |
| *base = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) | |
| (1 << 28)); |
| return 256; |
| |
| } |
| |
| static int add_fixed_resources(struct device *dev, int index) |
| { |
| struct resource *resource; |
| |
| resource = new_resource(dev, index++); /* Local APIC */ |
| resource->base = LAPIC_DEFAULT_BASE; |
| resource->size = 0x00001000; |
| resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | |
| IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; |
| |
| mmio_resource(dev, index++, legacy_hole_base_k, legacy_hole_size_k); |
| |
| return index; |
| } |
| |
| static void mc_add_dram_resources(struct device *dev) |
| { |
| u32 tomlow, bmbound, bsmmrrl, bsmmrrh; |
| u64 bmbound_hi; |
| int index = 0; |
| |
| /* |
| * These are the host memory ranges : |
| * - 0 -> SMM (SMMRRL) : cacheable |
| * - SMM -> LOW TOM (BMBOUND) : cacheable WP |
| * - 4GB -> HIGH TOM (BMBOUND_HI): cacheable |
| * |
| */ |
| |
| tomlow = bmbound = sideband_read(B_UNIT, BMBOUND); |
| printk(BIOS_SPEW, "Top of Low Used DRAM (BMBOUND): 0x%08x\n", bmbound); |
| |
| bmbound_hi = (u64)(sideband_read(B_UNIT, BMBOUND_HI)) << 4; |
| printk(BIOS_SPEW, "Top of Upper Used DRAM (BMBOUND_HI): 0x%llx\n", bmbound_hi); |
| |
| bsmmrrl = sideband_read(B_UNIT, BSMMRRL) << 20; |
| bsmmrrh = ((sideband_read(B_UNIT, BSMMRRH) + 1) << 20) - 1; |
| if (bsmmrrl) { |
| tomlow = bsmmrrl; |
| printk(BIOS_DEBUG, "SMM memory location: 0x%x SMM memory size: 0x%x\n", bsmmrrl, (bsmmrrh - bsmmrrl + 1)); |
| printk(BIOS_DEBUG, "Subtracting %dM for SMM\n", (bmbound - bsmmrrl) >> 20); |
| } |
| tomlow -= FSP_RESERVE_MEMORY_SIZE; |
| printk(BIOS_SPEW, "Available memory below 4GB: 0x%08x (%dM)\n", tomlow, tomlow >> 20); |
| |
| /* Report the memory regions. */ |
| ram_resource(dev, index++, 0, legacy_hole_base_k); |
| ram_resource(dev, index++, legacy_hole_base_k + legacy_hole_size_k, |
| ((tomlow >> 10) - (legacy_hole_base_k + legacy_hole_size_k))); |
| |
| mmio_resource(dev, index++, tomlow >> 10, (bmbound - bsmmrrl) >> 10); |
| |
| if (bmbound_hi > 0x100000000) { |
| ram_resource(dev, index++, 0x100000000 >> 10, (bmbound_hi - 0x100000000) >> 10); |
| printk(BIOS_INFO, "Available memory above 4GB: %lluM\n", (bmbound_hi - 0x100000000) >> 20); |
| } |
| |
| index = add_fixed_resources(dev, index); |
| } |
| |
| static void mc_read_resources(struct device *dev) |
| { |
| u32 pcie_config_base; |
| int buses; |
| |
| /* Call the normal read_resources */ |
| pci_dev_read_resources(dev); |
| |
| /* We use 0xcf as an unused index for our PCIe bar so that we find it again */ |
| buses = get_pcie_bar(&pcie_config_base); |
| if (buses) { |
| struct resource *resource = new_resource(dev, 0xcf); |
| mmconf_resource_init(resource, pcie_config_base, buses); |
| } |
| |
| /* Calculate and add DRAM resources. */ |
| mc_add_dram_resources(dev); |
| } |
| |
| static void pci_domain_set_resources(struct device *dev) |
| { |
| /* |
| * Assign memory resources for PCI devices |
| */ |
| mc_add_dram_resources(dev); |
| |
| assign_resources(dev->link_list); |
| } |
| |
| static void mc_set_resources(struct device *dev) |
| { |
| /* Call the normal set_resources */ |
| pci_dev_set_resources(dev); |
| } |
| |
| static void northbridge_init(struct device *dev) |
| { |
| } |
| |
| static void northbridge_enable(struct device *dev) |
| { |
| } |
| |
| static struct pci_operations intel_pci_ops = { |
| .set_subsystem = pci_dev_set_subsystem, |
| }; |
| |
| 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, |
| }; |
| |
| 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, |
| .acpi_fill_ssdt_generator = northbridge_acpi_fill_ssdt_generator, |
| .enable = northbridge_enable, |
| .scan_bus = 0, |
| .ops_pci = &intel_pci_ops, |
| }; |
| |
| /* |
| * The following entries are taken from Intel document number 510524, rev 1.6: |
| * Rangeley SoC External Design Specification (EDS) |
| * Section 10.3 PCI Configuration Space |
| * Table 10-6. PCI Devices and Functions |
| * |
| * These are the Device ID values for the item at bus 0, device 0, function 0. |
| */ |
| static const unsigned short pci_device_ids[] = { |
| 0x1f00, 0x1f01, 0x1f02, 0x1f03, |
| 0x1f04, 0x1f05, 0x1f06, 0x1f07, |
| 0x1f08, 0x1f09, 0x1f0a, 0x1f0b, |
| 0x1f0c, 0x1f0d, 0x1f0e, 0x1f0f, |
| 0, /* -- END OF LIST -- */ |
| }; |
| |
| static const struct pci_driver mc_driver __pci_driver = { |
| .ops = &mc_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = pci_device_ids, |
| }; |
| |
| static void cpu_bus_init(struct device *dev) |
| { |
| initialize_cpus(dev->link_list); |
| } |
| |
| static struct device_operations cpu_bus_ops = { |
| .read_resources = DEVICE_NOOP, |
| .set_resources = DEVICE_NOOP, |
| .enable_resources = DEVICE_NOOP, |
| .init = cpu_bus_init, |
| .scan_bus = 0, |
| }; |
| |
| 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_fsp_rangeley_ops = { |
| CHIP_NAME("Intel Rangeley Northbridge") |
| .enable_dev = enable_dev, |
| }; |