| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2007-2008 coresystems GmbH |
| * |
| * 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 <console/console.h> |
| #include <arch/io.h> |
| #include <stdint.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <device/hypertransport.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <bitops.h> |
| #include <cpu/cpu.h> |
| #include "chip.h" |
| #include "i945.h" |
| |
| static void ram_resource(device_t dev, unsigned long index, unsigned long basek, |
| unsigned long sizek) |
| { |
| struct resource *resource; |
| |
| 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 pci_domain_read_resources(device_t dev) |
| { |
| struct resource *resource; |
| |
| /* Initialize the system wide io space constraints */ |
| resource = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0)); |
| resource->base = 0; |
| resource->size = 0; |
| resource->align = 0; |
| resource->gran = 0; |
| resource->limit = 0xffffUL; |
| resource->flags = |
| IORESOURCE_IO | IORESOURCE_SUBTRACTIVE | IORESOURCE_ASSIGNED; |
| |
| /* Initialize the system wide memory resources constraints */ |
| resource = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0)); |
| resource->base = 0; |
| resource->size = 0; |
| resource->align = 0; |
| resource->gran = 0; |
| resource->limit = 0xffffffffUL; |
| resource->flags = |
| IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE | 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; |
| } |
| |
| static void pci_domain_set_resources(device_t dev) |
| { |
| uint32_t pci_tolm; |
| uint8_t tolud, reg8; |
| uint16_t reg16; |
| unsigned long long tomk, tolmk; |
| |
| pci_tolm = find_pci_tolm(&dev->link[0]); |
| |
| printk_spew("Base of stolen memory: 0x%08x\n", |
| pci_read_config32(dev_find_slot(0, PCI_DEVFN(2, 0)), 0x5c)); |
| |
| tolud = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9c); |
| printk_spew("Top of Low Used DRAM: 0x%08x\n", tolud << 24); |
| |
| tomk = tolud << 14; |
| |
| /* Note: subtract IGD device and TSEG */ |
| reg8 = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9e); |
| if (reg8 & 1) { |
| int tseg_size = 0; |
| printk_debug("TSEG decoded, subtracting "); |
| reg8 >>= 1; |
| reg8 &= 3; |
| switch (reg8) { |
| case 0: |
| tseg_size = 1024; |
| break; |
| case 1: |
| tseg_size = 2048; |
| break; |
| case 2: |
| tseg_size = 8192; |
| break; |
| } |
| |
| printk_debug("%dM\n", tseg_size >> 10); |
| tomk -= tseg_size; |
| } |
| |
| reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), GGC); |
| if (!(reg16 & 2)) { |
| int uma_size = 0; |
| printk_debug("IGD decoded, subtracting "); |
| reg16 >>= 4; |
| reg16 &= 7; |
| switch (reg16) { |
| case 1: |
| uma_size = 1024; |
| break; |
| case 3: |
| uma_size = 8192; |
| break; |
| } |
| |
| printk_debug("%dM UMA\n", uma_size >> 10); |
| tomk -= uma_size; |
| } |
| |
| /* The following needs to be 2 lines, otherwise the second |
| * number is always 0 |
| */ |
| printk_info("Available memory: %dK", tomk); |
| printk_info(" (%dM)\n", (tomk >> 10)); |
| |
| tolmk = tomk; |
| |
| /* Report the memory regions */ |
| ram_resource(dev, 3, 0, 640); |
| ram_resource(dev, 4, 768, (tolmk - 768)); |
| if (tomk > 4 * 1024 * 1024) { |
| ram_resource(dev, 5, 4096 * 1024, tomk - 4 * 1024 * 1024); |
| } |
| |
| assign_resources(&dev->link[0]); |
| } |
| |
| static unsigned int pci_domain_scan_bus(device_t dev, unsigned int max) |
| { |
| max = pci_scan_bus(&dev->link[0], 0, 0xff, max); |
| /* TODO We could determine how many PCIe busses we need in |
| * the bar. For now that number is hardcoded to a max of 64. |
| */ |
| return max; |
| } |
| |
| 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, |
| .ops_pci_bus = &pci_cf8_conf1, /* Do we want to use the memory mapped space here? */ |
| }; |
| |
| 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_debug("Adding PCIe enhanced config space BAR 0x%08x-0x%08x.\n", |
| resource->base, (resource->base + resource->size)); |
| } |
| |
| static void mc_set_resources(device_t dev) |
| { |
| struct resource *resource, *last; |
| |
| /* Report the PCIe BAR */ |
| last = &dev->resource[dev->resources]; |
| resource = find_resource(dev, 0xcf); |
| if (resource) { |
| report_resource_stored(dev, resource, "<mmconfig>"); |
| } |
| |
| /* And call the normal set_resources */ |
| pci_dev_set_resources(dev); |
| } |
| |
| static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device) |
| { |
| pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, |
| ((device & 0xffff) << 16) | (vendor & 0xffff)); |
| } |
| |
| 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 = 0, |
| .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 = 0x27a0, |
| }; |
| |
| 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(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_i945_ops = { |
| CHIP_NAME("Intel i945 Northbridge") |
| .enable_dev = enable_dev, |
| }; |