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>
31 #include <boot/tables.h>
34 #include <arch/coreboot_tables.h>
36 static int get_pcie_bar(u32 *base, u32 *len)
44 dev = dev_find_slot(0, PCI_DEVFN(0, 0));
48 pciexbar_reg = pci_read_config32(dev, PCIEXBAR);
50 if (!(pciexbar_reg & (1 << 0)))
53 switch ((pciexbar_reg >> 1) & 3) {
55 *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28));
56 *len = 256 * 1024 * 1024;
59 *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27));
60 *len = 128 * 1024 * 1024;
63 *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)|(1 << 26));
64 *len = 64 * 1024 * 1024;
72 uint64_t uma_memory_base=0, uma_memory_size=0;
74 int add_northbridge_resources(struct lb_memory *mem)
76 u32 pcie_config_base, pcie_config_size;
78 printk(BIOS_DEBUG, "Adding UMA memory area\n");
79 lb_add_memory_range(mem, LB_MEM_RESERVED,
80 uma_memory_base, uma_memory_size);
82 printk(BIOS_DEBUG, "Adding PCIe config bar\n");
83 get_pcie_bar(&pcie_config_base, &pcie_config_size);
84 lb_add_memory_range(mem, LB_MEM_RESERVED,
85 pcie_config_base, pcie_config_size);
90 static void ram_resource(device_t dev, unsigned long index, unsigned long basek,
93 struct resource *resource;
95 resource = new_resource(dev, index);
96 resource->base = ((resource_t) basek) << 10;
97 resource->size = ((resource_t) sizek) << 10;
98 resource->flags = IORESOURCE_MEM | IORESOURCE_CACHEABLE |
99 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
102 static void tolm_test(void *gp, struct device *dev, struct resource *new)
104 struct resource **best_p = gp;
105 struct resource *best;
107 if (!best || (best->base > new->base)) {
113 static uint32_t find_pci_tolm(struct bus *bus)
115 struct resource *min;
118 search_bus_resources(bus, IORESOURCE_MEM, IORESOURCE_MEM, tolm_test,
121 if (min && tolm > min->base) {
127 #if CONFIG_WRITE_HIGH_TABLES==1
128 #define HIGH_TABLES_SIZE 1024 // maximum size of high tables in KB
129 extern uint64_t high_tables_base, high_tables_size;
132 static void pci_domain_set_resources(device_t dev)
137 unsigned long long tomk;
139 /* Can we find out how much memory we can use at most
142 pci_tolm = find_pci_tolm(&dev->link[0]);
143 printk(BIOS_DEBUG, "pci_tolm: 0x%x\n", pci_tolm);
145 printk(BIOS_SPEW, "Base of stolen memory: 0x%08x\n",
146 pci_read_config32(dev_find_slot(0, PCI_DEVFN(2, 0)), 0x5c));
148 tolud = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9c);
149 printk(BIOS_SPEW, "Top of Low Used DRAM: 0x%08x\n", tolud << 24);
153 /* Note: subtract IGD device and TSEG */
154 reg8 = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9e);
157 printk(BIOS_DEBUG, "TSEG decoded, subtracting ");
163 break; /* TSEG = 1M */
166 break; /* TSEG = 2M */
169 break; /* TSEG = 8M */
172 printk(BIOS_DEBUG, "%dM\n", tseg_size >> 10);
176 reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), GGC);
179 printk(BIOS_DEBUG, "IGD decoded, subtracting ");
191 printk(BIOS_DEBUG, "%dM UMA\n", uma_size >> 10);
194 /* For reserving UMA memory in the memory map */
195 uma_memory_base = tomk * 1024ULL;
196 uma_memory_size = uma_size * 1024ULL;
199 /* The following needs to be 2 lines, otherwise the second
202 printk(BIOS_INFO, "Available memory: %dK", (uint32_t)tomk);
203 printk(BIOS_INFO, " (%dM)\n", (uint32_t)(tomk >> 10));
205 /* Report the memory regions */
206 ram_resource(dev, 3, 0, 640);
207 ram_resource(dev, 4, 768, (tomk - 768));
208 if (tomk > 4 * 1024 * 1024) {
209 ram_resource(dev, 5, 4096 * 1024, tomk - 4 * 1024 * 1024);
212 assign_resources(&dev->link[0]);
214 #if CONFIG_WRITE_HIGH_TABLES==1
215 /* Leave some space for ACPI, PIRQ and MP tables */
216 high_tables_base = (tomk - HIGH_TABLES_SIZE) * 1024;
217 high_tables_size = HIGH_TABLES_SIZE * 1024;
221 /* TODO We could determine how many PCIe busses we need in
222 * the bar. For now that number is hardcoded to a max of 64.
223 * See e7525/northbridge.c for an example.
225 static struct device_operations pci_domain_ops = {
226 .read_resources = pci_domain_read_resources,
227 .set_resources = pci_domain_set_resources,
228 .enable_resources = enable_childrens_resources,
230 .scan_bus = pci_domain_scan_bus,
231 #if CONFIG_MMCONF_SUPPORT_DEFAULT
232 .ops_pci_bus = &pci_ops_mmconf,
234 .ops_pci_bus = &pci_cf8_conf1,
238 static void mc_read_resources(device_t dev)
240 struct resource *resource;
242 pci_dev_read_resources(dev);
244 /* So, this is one of the big mysteries in the coreboot resource
245 * allocator. This resource should make sure that the address space
246 * of the PCIe memory mapped config space bar. But it does not.
249 /* We use 0xcf as an unused index for our PCIe bar so that we find it again */
250 resource = new_resource(dev, 0xcf);
251 resource->base = DEFAULT_PCIEXBAR;
252 resource->size = 64 * 1024 * 1024; /* 64MB hard coded PCIe config space */
254 IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED |
256 printk(BIOS_DEBUG, "Adding PCIe enhanced config space BAR 0x%08lx-0x%08lx.\n",
257 (unsigned long)(resource->base), (unsigned long)(resource->base + resource->size));
260 static void mc_set_resources(device_t dev)
262 struct resource *resource;
264 /* Report the PCIe BAR */
265 resource = find_resource(dev, 0xcf);
267 report_resource_stored(dev, resource, "<mmconfig>");
270 /* And call the normal set_resources */
271 pci_dev_set_resources(dev);
274 static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device)
276 if (!vendor || !device) {
277 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
278 pci_read_config32(dev, PCI_VENDOR_ID));
280 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
281 ((device & 0xffff) << 16) | (vendor & 0xffff));
285 #if CONFIG_HAVE_ACPI_RESUME
286 extern u8 acpi_slp_type;
288 static void northbridge_init(struct device *dev)
290 switch (pci_read_config32(dev, SKPAD)) {
292 printk(BIOS_DEBUG, "Normal boot.\n");
296 printk(BIOS_DEBUG, "S3 Resume.\n");
300 printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n");
307 static struct pci_operations intel_pci_ops = {
308 .set_subsystem = intel_set_subsystem,
311 static struct device_operations mc_ops = {
312 .read_resources = mc_read_resources,
313 .set_resources = mc_set_resources,
314 .enable_resources = pci_dev_enable_resources,
315 #if CONFIG_HAVE_ACPI_RESUME
316 .init = northbridge_init,
319 .ops_pci = &intel_pci_ops,
322 static const struct pci_driver mc_driver __pci_driver = {
324 .vendor = PCI_VENDOR_ID_INTEL,
328 static void cpu_bus_init(device_t dev)
330 initialize_cpus(&dev->link[0]);
333 static void cpu_bus_noop(device_t dev)
337 static struct device_operations cpu_bus_ops = {
338 .read_resources = cpu_bus_noop,
339 .set_resources = cpu_bus_noop,
340 .enable_resources = cpu_bus_noop,
341 .init = cpu_bus_init,
345 static void enable_dev(device_t dev)
347 /* Set the operations if it is a special bus type */
348 if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
349 dev->ops = &pci_domain_ops;
350 } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
351 dev->ops = &cpu_bus_ops;
355 struct chip_operations northbridge_intel_i945_ops = {
356 CHIP_NAME("Intel i945 Northbridge")
357 .enable_dev = enable_dev,