| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2007 Corey Osgood <corey@slightlyhackish.com> |
| * |
| * 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; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * 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 <console/console.h> |
| #include <arch/io.h> |
| #include <stdint.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <bitops.h> |
| #include <cpu/cpu.h> |
| #include "chip.h" |
| #include "northbridge.h" |
| #include "i82810.h" |
| |
| static void northbridge_init(device_t dev) |
| { |
| printk_spew("Northbridge init\n"); |
| } |
| |
| static struct device_operations northbridge_operations = { |
| .read_resources = pci_dev_read_resources, |
| .set_resources = pci_dev_set_resources, |
| .enable_resources = pci_dev_enable_resources, |
| .init = northbridge_init, |
| .enable = 0, |
| .ops_pci = 0, |
| }; |
| |
| /* Intel 82810/82810-DC100 */ |
| static const struct pci_driver i810_northbridge_driver __pci_driver = { |
| .ops = &northbridge_operations, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .device = 0x7120, |
| }; |
| |
| /* Intel 82810E */ |
| static const struct pci_driver i810e_northbridge_driver __pci_driver = { |
| .ops = &northbridge_operations, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .device = 0x7124, |
| }; |
| |
| static void ram_resource(device_t dev, unsigned long index, |
| unsigned long basek, unsigned long sizek) |
| { |
| struct resource *resource; |
| |
| if (!sizek) { |
| return; |
| } |
| resource = new_resource(dev, index); |
| resource->base = ((resource_t) basek) << 10; |
| resource->size = ((resource_t) sizek) << 10; |
| resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE | |
| IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; |
| } |
| |
| static void tolm_test(void *gp, struct device *dev, struct resource *new) |
| { |
| struct resource **best_p = gp; |
| struct resource *best; |
| best = *best_p; |
| if (!best || (best->base > new->base)) { |
| best = new; |
| } |
| *best_p = best; |
| } |
| |
| static uint32_t find_pci_tolm(struct bus *bus) |
| { |
| struct resource *min; |
| uint32_t tolm; |
| min = 0; |
| search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test, |
| &min); |
| tolm = 0xffffffffUL; |
| if (min && tolm > min->base) { |
| tolm = min->base; |
| } |
| return tolm; |
| } |
| |
| /* Table which returns the RAM size in MB when fed the DRP[7:4] or [3:0] value. |
| * Note that 2 is a value which the DRP should never be programmed to. |
| * Some size values appear twice, due to single-sided vs dual-sided banks. |
| */ |
| static int translate_i82810_to_mb[] = { |
| /* DRP 0 1 (2) 3 4 5 6 7 8 9 A B C D E F */ |
| /* MB */0, 8, 0, 16, 16, 24, 32, 32, 48, 64, 64, 96, 128, 128, 192, 256, |
| }; |
| |
| #if CONFIG_WRITE_HIGH_TABLES==1 |
| #define HIGH_TABLES_SIZE 64 // maximum size of high tables in KB |
| extern uint64_t high_tables_base, high_tables_size; |
| #endif |
| |
| static void pci_domain_set_resources(device_t dev) |
| { |
| device_t mc_dev; |
| uint32_t pci_tolm; |
| |
| pci_tolm = find_pci_tolm(&dev->link[0]); |
| mc_dev = dev->link[0].children; |
| |
| if (mc_dev) { |
| /* Figure out which areas are/should be occupied by RAM. |
| * This is all computed in kilobytes and converted to/from |
| * the memory controller right at the edges. |
| * Having different variables in different units is |
| * too confusing to get right. Kilobytes are good up to |
| * 4 Terabytes of RAM... |
| */ |
| unsigned long tomk, tolmk; |
| int idx; |
| int drp_value; |
| |
| /* First get the value for DIMM 0. */ |
| drp_value = pci_read_config8(mc_dev, DRP); |
| /* Translate it to MB and add to tomk. */ |
| tomk = (unsigned long)(translate_i82810_to_mb[drp_value & 0xf]); |
| /* Now do the same for DIMM 1. */ |
| drp_value = drp_value >> 4; // >>= 4; //? mess with later |
| tomk += (unsigned long)(translate_i82810_to_mb[drp_value]); |
| |
| printk_debug("Setting RAM size to %d MB\n", tomk); |
| |
| /* Convert tomk from MB to KB. */ |
| tomk = tomk << 10; |
| |
| #ifdef CONFIG_VIDEO_MB |
| /* Check for VGA reserved memory. */ |
| if (CONFIG_VIDEO_MB == 512) { |
| tomk -= 512; |
| printk_debug("Allocating %s RAM for VGA\n", "512KB"); |
| } else if (CONFIG_VIDEO_MB == 1) { |
| tomk -= 1024 ; |
| printk_debug("Allocating %s RAM for VGA\n", "1MB"); |
| } else { |
| printk_debug("Allocating %s RAM for VGA\n", "0MB"); |
| } |
| #endif |
| |
| /* Compute the top of Low memory. */ |
| tolmk = pci_tolm >> 10; |
| if (tolmk >= tomk) { |
| /* The PCI hole does does not overlap the memory. */ |
| tolmk = tomk; |
| } |
| |
| /* Report the memory regions. */ |
| idx = 10; |
| ram_resource(dev, idx++, 0, 640); |
| ram_resource(dev, idx++, 768, tolmk - 768); |
| |
| #if CONFIG_WRITE_HIGH_TABLES==1 |
| /* Leave some space for ACPI, PIRQ and MP tables */ |
| high_tables_base = (tomk - HIGH_TABLES_SIZE) * 1024; |
| high_tables_size = HIGH_TABLES_SIZE * 1024; |
| #endif |
| } |
| assign_resources(&dev->link[0]); |
| } |
| |
| static struct device_operations pci_domain_ops = { |
| .read_resources = pci_domain_read_resources, |
| .set_resources = pci_domain_set_resources, |
| .enable_resources = enable_childrens_resources, |
| .init = 0, |
| .scan_bus = pci_domain_scan_bus, |
| }; |
| |
| static void cpu_bus_init(device_t dev) |
| { |
| initialize_cpus(&dev->link[0]); |
| } |
| |
| 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(struct device *dev) |
| { |
| struct device_path path; |
| |
| /* Set the operations if it is a special bus type */ |
| if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) { |
| dev->ops = &pci_domain_ops; |
| pci_set_method(dev); |
| } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) { |
| dev->ops = &cpu_bus_ops; |
| } |
| } |
| |
| struct chip_operations northbridge_intel_i82810_ops = { |
| CHIP_NAME("Intel 82810 Northbridge") |
| .enable_dev = enable_dev, |
| }; |