2 * This file is part of the coreboot project.
4 * Copyright (C) 2007-2009 coresystems GmbH
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 #include <console/console.h>
23 #include <device/device.h>
24 #include <device/pci.h>
25 #include <device/pci_ids.h>
26 #include <device/hypertransport.h>
34 static void ram_resource(device_t dev, unsigned long index, unsigned long basek,
37 struct resource *resource;
39 resource = new_resource(dev, index);
40 resource->base = ((resource_t) basek) << 10;
41 resource->size = ((resource_t) sizek) << 10;
42 resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE |
43 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
46 static void tolm_test(void *gp, struct device *dev, struct resource *new)
48 struct resource **best_p = gp;
49 struct resource *best;
51 if (!best || (best->base > new->base)) {
57 static uint32_t find_pci_tolm(struct bus *bus)
62 search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test,
65 if (min && tolm > min->base) {
71 #if CONFIG_HAVE_HIGH_TABLES==1
72 #define HIGH_TABLES_SIZE 64 // maximum size of high tables in KB
73 extern uint64_t high_tables_base, high_tables_size;
75 uint64_t uma_memory_base=0, uma_memory_size=0;
77 static void pci_domain_set_resources(device_t dev)
82 unsigned long long tomk;
84 pci_tolm = find_pci_tolm(&dev->link[0]);
86 printk_spew("Base of stolen memory: 0x%08x\n",
87 pci_read_config32(dev_find_slot(0, PCI_DEVFN(2, 0)), 0x5c));
89 tolud = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9c);
90 printk_spew("Top of Low Used DRAM: 0x%08x\n", tolud << 24);
94 /* Note: subtract IGD device and TSEG */
95 reg8 = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9e);
98 printk_debug("TSEG decoded, subtracting ");
104 break; /* TSEG = 1M */
107 break; /* TSEG = 2M */
110 break; /* TSEG = 8M */
113 printk_debug("%dM\n", tseg_size >> 10);
117 reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), GGC);
120 printk_debug("IGD decoded, subtracting ");
132 printk_debug("%dM UMA\n", uma_size >> 10);
135 /* For reserving UMA memory in the memory map */
136 uma_memory_base = tomk * 1024ULL;
137 uma_memory_size = uma_size * 1024ULL;
140 /* The following needs to be 2 lines, otherwise the second
143 printk_info("Available memory: %dK", (uint32_t)tomk);
144 printk_info(" (%dM)\n", (uint32_t)(tomk >> 10));
146 /* Report the memory regions */
147 ram_resource(dev, 3, 0, 640);
148 ram_resource(dev, 4, 768, (tomk - 768));
149 if (tomk > 4 * 1024 * 1024) {
150 ram_resource(dev, 5, 4096 * 1024, tomk - 4 * 1024 * 1024);
153 assign_resources(&dev->link[0]);
155 #if CONFIG_HAVE_HIGH_TABLES==1
156 /* Leave some space for ACPI, PIRQ and MP tables */
157 high_tables_base = (tomk - HIGH_TABLES_SIZE) * 1024;
158 high_tables_size = HIGH_TABLES_SIZE * 1024;
162 /* TODO We could determine how many PCIe busses we need in
163 * the bar. For now that number is hardcoded to a max of 64.
164 * See e7525/northbridge.c for an example.
166 static struct device_operations pci_domain_ops = {
167 .read_resources = pci_domain_read_resources,
168 .set_resources = pci_domain_set_resources,
169 .enable_resources = enable_childrens_resources,
171 .scan_bus = pci_domain_scan_bus,
172 #if CONFIG_MMCONF_SUPPORT_DEFAULT
173 .ops_pci_bus = &pci_ops_mmconf,
175 .ops_pci_bus = &pci_cf8_conf1,
179 static void mc_read_resources(device_t dev)
181 struct resource *resource;
183 pci_dev_read_resources(dev);
185 /* So, this is one of the big mysteries in the coreboot resource
186 * allocator. This resource should make sure that the address space
187 * of the PCIe memory mapped config space bar. But it does not.
190 /* We use 0xcf as an unused index for our PCIe bar so that we find it again */
191 resource = new_resource(dev, 0xcf);
192 resource->base = DEFAULT_PCIEXBAR;
193 resource->size = 64 * 1024 * 1024; /* 64MB hard coded PCIe config space */
195 IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED |
197 printk_debug("Adding PCIe enhanced config space BAR 0x%08lx-0x%08lx.\n",
198 (unsigned long)(resource->base), (unsigned long)(resource->base + resource->size));
201 static void mc_set_resources(device_t dev)
203 struct resource *resource, *last;
205 /* Report the PCIe BAR */
206 last = &dev->resource[dev->resources];
207 resource = find_resource(dev, 0xcf);
209 report_resource_stored(dev, resource, "<mmconfig>");
212 /* And call the normal set_resources */
213 pci_dev_set_resources(dev);
216 static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device)
218 if (!vendor || !device) {
219 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
220 pci_read_config32(dev, PCI_VENDOR_ID));
222 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
223 ((device & 0xffff) << 16) | (vendor & 0xffff));
227 static struct pci_operations intel_pci_ops = {
228 .set_subsystem = intel_set_subsystem,
231 static struct device_operations mc_ops = {
232 .read_resources = mc_read_resources,
233 .set_resources = mc_set_resources,
234 .enable_resources = pci_dev_enable_resources,
237 .ops_pci = &intel_pci_ops,
240 static const struct pci_driver mc_driver __pci_driver = {
242 .vendor = PCI_VENDOR_ID_INTEL,
246 static void cpu_bus_init(device_t dev)
248 initialize_cpus(&dev->link[0]);
251 static void cpu_bus_noop(device_t dev)
255 static struct device_operations cpu_bus_ops = {
256 .read_resources = cpu_bus_noop,
257 .set_resources = cpu_bus_noop,
258 .enable_resources = cpu_bus_noop,
259 .init = cpu_bus_init,
263 static void enable_dev(device_t dev)
265 /* Set the operations if it is a special bus type */
266 if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
267 dev->ops = &pci_domain_ops;
268 } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
269 dev->ops = &cpu_bus_ops;
273 struct chip_operations northbridge_intel_i945_ops = {
274 CHIP_NAME("Intel i945 Northbridge")
275 .enable_dev = enable_dev,