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>
35 static int get_pcie_bar(u32 *base, u32 *len)
40 dev = dev_find_slot(0, PCI_DEVFN(0, 0));
44 // FIXME: determine at runtime
46 pciexbar_reg = sch_port_access_read(0,0,4);
48 pciexbar_reg = sch_port_access_read(2,9,4);
51 if (!(pciexbar_reg & (1 << 0)))
54 switch ((pciexbar_reg >> 1) & 3) {
56 *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28));
57 *len = 256 * 1024 * 1024;
60 *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27));
61 *len = 128 * 1024 * 1024;
64 *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)|(1 << 26));
65 *len = 64 * 1024 * 1024;
73 uint64_t uma_memory_base=0, uma_memory_size=0;
75 static void add_fixed_resources(struct device *dev, int index)
77 struct resource *resource;
78 u32 pcie_config_base, pcie_config_size;
80 printk(BIOS_DEBUG, "Adding UMA memory area\n");
81 resource = new_resource(dev, index);
82 resource->base = (resource_t) uma_memory_base;
83 resource->size = (resource_t) uma_memory_size;
84 resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
85 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
87 if (get_pcie_bar(&pcie_config_base, &pcie_config_size)) {
88 printk(BIOS_DEBUG, "Adding PCIe config bar\n");
89 resource = new_resource(dev, index+1);
90 resource->base = (resource_t) pcie_config_base;
91 resource->size = (resource_t) pcie_config_size;
92 resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
93 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
96 printk(BIOS_DEBUG, "Adding CMC shadow area\n");
97 resource = new_resource(dev, index+1);
98 resource->base = (resource_t) CMC_SHADOW;
99 resource->size = (resource_t) (64 * 1024);
100 resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
101 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
105 #if CONFIG_WRITE_HIGH_TABLES==1
109 static void pci_domain_set_resources(device_t dev)
114 unsigned long long tomk, tolud;
115 /* Can we find out how much memory we can use at most
118 pci_tolm = find_pci_tolm(dev->link_list);
119 printk(BIOS_DEBUG, "pci_tolm: 0x%x\n", pci_tolm);
120 printk(BIOS_SPEW, "Base of stolen memory: 0x%08x\n",
121 pci_read_config32(dev_find_slot(0, PCI_DEVFN(2, 0)), 0x5c));
123 tolud = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9c);
124 printk(BIOS_SPEW, "Top of Low Used DRAM: 0x%08llx\n", tolud << 24);
128 /* Note: subtract IGD device and TSEG */
129 reg8 = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9e);
133 printk(BIOS_DEBUG, "TSEG decoded, subtracting ");
139 break; /* TSEG = 1M */
142 break; /* TSEG = 2M */
145 break; /* TSEG = 8M */
148 printk(BIOS_DEBUG, "%dM\n", tseg_size >> 10);
152 reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), GGC);
156 printk(BIOS_DEBUG, "IGD decoded, subtracting ");
171 printk(BIOS_DEBUG, "%dM UMA\n", uma_size >> 10);
174 /* For reserving UMA memory in the memory map */
175 uma_memory_base = tomk * 1024ULL;
176 uma_memory_size = uma_size * 1024ULL;
179 /* The following needs to be 2 lines, otherwise the second
182 printk(BIOS_INFO, "Available memory: %dK", (uint32_t)tomk);
183 printk(BIOS_INFO, " (%dM)\n", (uint32_t)(tomk >> 10));
185 /* Report the memory regions */
186 ram_resource(dev, 3, 0, 640);
187 ram_resource(dev, 4, 768, (tomk - 768));
188 if (tomk > 4 * 1024 * 1024) {
189 ram_resource(dev, 5, 4096 * 1024, tomk - 4 * 1024 * 1024);
192 add_fixed_resources(dev, 6);
194 assign_resources(dev->link_list);
196 #if CONFIG_WRITE_HIGH_TABLES==1
197 /* Leave some space for ACPI, PIRQ and MP tables */
198 high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
199 high_tables_size = HIGH_MEMORY_SIZE;
203 /* TODO We could determine how many PCIe busses we need in
204 * the bar. For now that number is hardcoded to a max of 64.
205 * See e7525/northbridge.c for an example.
207 static struct device_operations pci_domain_ops = {
208 .read_resources = pci_domain_read_resources,
209 .set_resources = pci_domain_set_resources,
210 .enable_resources = NULL,
212 .scan_bus = pci_domain_scan_bus,
213 #if CONFIG_MMCONF_SUPPORT_DEFAULT
214 .ops_pci_bus = &pci_ops_mmconf,
216 .ops_pci_bus = &pci_cf8_conf1,
220 static void mc_read_resources(device_t dev)
222 struct resource *resource;
224 pci_dev_read_resources(dev);
226 /* So, this is one of the big mysteries in the coreboot resource
227 * allocator. This resource should make sure that the address space
228 * of the PCIe memory mapped config space bar. But it does not.
231 /* We use 0xcf as an unused index for our PCIe bar so that we find it again */
232 resource = new_resource(dev, 0xcf);
234 IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED |
236 get_pcie_bar((u32*)&resource->base, (u32*)&resource->size);
237 printk(BIOS_DEBUG, "Adding PCIe enhanced config space BAR 0x%08lx-0x%08lx.\n",
238 (unsigned long)(resource->base), (unsigned long)(resource->base + resource->size));
241 static void mc_set_resources(device_t dev)
243 struct resource *resource;
245 /* Report the PCIe BAR */
246 resource = find_resource(dev, 0xcf);
248 report_resource_stored(dev, resource, "<mmconfig>");
251 /* And call the normal set_resources */
252 pci_dev_set_resources(dev);
255 static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device)
257 if (!vendor || !device) {
258 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
259 pci_read_config32(dev, PCI_VENDOR_ID));
261 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
262 ((device & 0xffff) << 16) | (vendor & 0xffff));
266 #if CONFIG_HAVE_ACPI_RESUME
267 extern u8 acpi_slp_type;
269 static void northbridge_init(struct device *dev)
271 switch (pci_read_config32(dev, SKPAD)) {
273 printk(BIOS_DEBUG, "Normal boot.\n");
277 printk(BIOS_DEBUG, "S3 Resume.\n");
281 printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n");
288 static struct pci_operations intel_pci_ops = {
289 .set_subsystem = intel_set_subsystem,
292 static struct device_operations mc_ops = {
293 .read_resources = mc_read_resources,
294 .set_resources = mc_set_resources,
295 .enable_resources = pci_dev_enable_resources,
296 #if CONFIG_HAVE_ACPI_RESUME
297 .init = northbridge_init,
300 .ops_pci = &intel_pci_ops,
303 static const struct pci_driver mc_driver __pci_driver = {
305 .vendor = PCI_VENDOR_ID_INTEL,
309 static void cpu_bus_init(device_t dev)
311 initialize_cpus(dev->link_list);
314 static void cpu_bus_noop(device_t dev)
318 static struct device_operations cpu_bus_ops = {
319 .read_resources = cpu_bus_noop,
320 .set_resources = cpu_bus_noop,
321 .enable_resources = cpu_bus_noop,
322 .init = cpu_bus_init,
326 static void enable_dev(device_t dev)
328 /* Set the operations if it is a special bus type */
329 if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
330 dev->ops = &pci_domain_ops;
331 } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
332 dev->ops = &cpu_bus_ops;
336 struct chip_operations northbridge_intel_sch_ops = {
337 CHIP_NAME("Intel SCH Northbridge")
338 .enable_dev = enable_dev,