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>
32 #include <arch/acpi.h>
36 static int get_pcie_bar(u32 *base, u32 *len)
41 dev = dev_find_slot(0, PCI_DEVFN(0, 0));
45 /* FIXME: Determine at runtime. */
47 pciexbar_reg = sch_port_access_read(0, 0, 4);
49 pciexbar_reg = sch_port_access_read(2, 9, 4);
52 if (!(pciexbar_reg & (1 << 0)))
55 switch ((pciexbar_reg >> 1) & 3) {
57 *base = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
59 *len = 256 * 1024 * 1024;
62 *base = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
63 (1 << 28) | (1 << 27));
64 *len = 128 * 1024 * 1024;
67 *base = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
68 (1 << 28) | (1 << 27) | (1 << 26));
69 *len = 64 * 1024 * 1024;
77 u64 uma_memory_base = 0, uma_memory_size = 0;
79 static void add_fixed_resources(struct device *dev, int index)
81 struct resource *resource;
82 u32 pcie_config_base, pcie_config_size;
84 printk(BIOS_DEBUG, "Adding UMA memory area\n");
85 resource = new_resource(dev, index);
86 resource->base = (resource_t) uma_memory_base;
87 resource->size = (resource_t) uma_memory_size;
88 resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
89 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
91 if (get_pcie_bar(&pcie_config_base, &pcie_config_size)) {
92 printk(BIOS_DEBUG, "Adding PCIe config bar\n");
93 resource = new_resource(dev, index + 1);
94 resource->base = (resource_t) pcie_config_base;
95 resource->size = (resource_t) pcie_config_size;
96 resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
97 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
100 printk(BIOS_DEBUG, "Adding CMC shadow area\n");
101 resource = new_resource(dev, index + 1);
102 resource->base = (resource_t) CMC_SHADOW;
103 resource->size = (resource_t) (64 * 1024);
104 resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
105 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
108 #if CONFIG_WRITE_HIGH_TABLES==1
112 static void pci_domain_set_resources(device_t dev)
117 unsigned long long tomk, tolud;
119 /* Can we find out how much memory we can use at most this way? */
120 pci_tolm = find_pci_tolm(dev->link_list);
121 printk(BIOS_DEBUG, "pci_tolm: 0x%x\n", pci_tolm);
122 printk(BIOS_SPEW, "Base of stolen memory: 0x%08x\n",
123 pci_read_config32(dev_find_slot(0, PCI_DEVFN(2, 0)), 0x5c));
125 tolud = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9c);
126 printk(BIOS_SPEW, "Top of Low Used DRAM: 0x%08llx\n", tolud << 24);
130 /* Note: subtract IGD device and TSEG. */
131 reg8 = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9e);
134 printk(BIOS_DEBUG, "TSEG decoded, subtracting ");
139 tseg_size = 1024; /* TSEG = 1M */
142 tseg_size = 2048; /* TSEG = 2M */
145 tseg_size = 8192; /* TSEG = 8M */
149 printk(BIOS_DEBUG, "%dM\n", tseg_size >> 10);
153 reg16 = pci_read_config16(dev_find_slot(0, PCI_DEVFN(0, 0)), GGC);
156 printk(BIOS_DEBUG, "IGD decoded, subtracting ");
170 printk(BIOS_DEBUG, "%dM UMA\n", uma_size >> 10);
173 /* For reserving UMA memory in the memory map. */
174 uma_memory_base = tomk * 1024ULL;
175 uma_memory_size = uma_size * 1024ULL;
179 * The following needs to be 2 lines, otherwise the second
180 * number is always 0.
182 printk(BIOS_INFO, "Available memory: %dK", (u32) tomk);
183 printk(BIOS_INFO, " (%dM)\n", (u32) (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);
191 add_fixed_resources(dev, 6);
193 assign_resources(dev->link_list);
195 #if CONFIG_WRITE_HIGH_TABLES==1
196 /* Leave some space for ACPI, PIRQ and MP tables. */
197 high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
198 high_tables_size = HIGH_MEMORY_SIZE;
203 * TODO: We could determine how many PCIe busses we need in the bar. For now
204 * 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);
227 * So, this is one of the big mysteries in the coreboot resource
228 * allocator. This resource should make sure that the address space
229 * of the PCIe memory mapped config space bar. But it does not.
233 * We use 0xcf as an unused index for our PCIe bar so that we find
236 resource = new_resource(dev, 0xcf);
237 resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
238 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
239 get_pcie_bar((u32 *)&resource->base, (u32 *)&resource->size);
241 "Adding PCIe enhanced config space BAR 0x%08lx-0x%08lx.\n",
242 (unsigned long)(resource->base),
243 (unsigned long)(resource->base + resource->size));
246 static void mc_set_resources(device_t dev)
248 struct resource *resource;
250 /* Report the PCIe BAR. */
251 resource = find_resource(dev, 0xcf);
253 report_resource_stored(dev, resource, "<mmconfig>");
255 /* And call the normal set_resources. */
256 pci_dev_set_resources(dev);
259 static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device)
261 if (!vendor || !device) {
262 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
263 pci_read_config32(dev, PCI_VENDOR_ID));
265 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
266 ((device & 0xffff) << 16) | (vendor & 0xffff));
270 #if CONFIG_HAVE_ACPI_RESUME
271 static void northbridge_init(struct device *dev)
273 switch (pci_read_config32(dev, SKPAD)) {
275 printk(BIOS_DEBUG, "Normal boot.\n");
279 printk(BIOS_DEBUG, "S3 Resume.\n");
283 printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n");
290 static struct pci_operations intel_pci_ops = {
291 .set_subsystem = intel_set_subsystem,
294 static struct device_operations mc_ops = {
295 .read_resources = mc_read_resources,
296 .set_resources = mc_set_resources,
297 .enable_resources = pci_dev_enable_resources,
298 #if CONFIG_HAVE_ACPI_RESUME
299 .init = northbridge_init,
302 .ops_pci = &intel_pci_ops,
305 static const struct pci_driver mc_driver __pci_driver = {
307 .vendor = PCI_VENDOR_ID_INTEL,
311 static void cpu_bus_init(device_t dev)
313 initialize_cpus(dev->link_list);
316 static void cpu_bus_noop(device_t dev)
320 static struct device_operations cpu_bus_ops = {
321 .read_resources = cpu_bus_noop,
322 .set_resources = cpu_bus_noop,
323 .enable_resources = cpu_bus_noop,
324 .init = cpu_bus_init,
328 static void enable_dev(device_t dev)
330 /* Set the operations if it is a special bus type. */
331 if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
332 dev->ops = &pci_domain_ops;
333 } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
334 dev->ops = &cpu_bus_ops;
338 struct chip_operations northbridge_intel_sch_ops = {
339 CHIP_NAME("Intel SCH Northbridge")
340 .enable_dev = enable_dev,