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) |
58 *len = 256 * 1024 * 1024;
61 *base = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
62 (1 << 28) | (1 << 27));
63 *len = 128 * 1024 * 1024;
66 *base = pciexbar_reg & ((1 << 31) | (1 << 30) | (1 << 29) |
67 (1 << 28) | (1 << 27) | (1 << 26));
68 *len = 64 * 1024 * 1024;
76 u64 uma_memory_base = 0, uma_memory_size = 0;
78 static void add_fixed_resources(struct device *dev, int index)
80 struct resource *resource;
81 u32 pcie_config_base, pcie_config_size;
83 printk(BIOS_DEBUG, "Adding UMA memory area\n");
84 resource = new_resource(dev, index);
85 resource->base = (resource_t) uma_memory_base;
86 resource->size = (resource_t) uma_memory_size;
87 resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
88 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
90 if (get_pcie_bar(&pcie_config_base, &pcie_config_size)) {
91 printk(BIOS_DEBUG, "Adding PCIe config bar\n");
92 resource = new_resource(dev, index + 1);
93 resource->base = (resource_t) pcie_config_base;
94 resource->size = (resource_t) pcie_config_size;
95 resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
96 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
99 printk(BIOS_DEBUG, "Adding CMC shadow area\n");
100 resource = new_resource(dev, index + 1);
101 resource->base = (resource_t) CMC_SHADOW;
102 resource->size = (resource_t) (64 * 1024);
103 resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
104 IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
107 #if CONFIG_WRITE_HIGH_TABLES==1
111 static void pci_domain_set_resources(device_t dev)
116 unsigned long long tomk, tolud;
118 /* Can we find out how much memory we can use at most this way? */
119 pci_tolm = find_pci_tolm(dev->link_list);
120 printk(BIOS_DEBUG, "pci_tolm: 0x%x\n", pci_tolm);
121 printk(BIOS_SPEW, "Base of stolen memory: 0x%08x\n",
122 pci_read_config32(dev_find_slot(0, PCI_DEVFN(2, 0)), 0x5c));
124 tolud = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9c);
125 printk(BIOS_SPEW, "Top of Low Used DRAM: 0x%08llx\n", tolud << 24);
129 /* Note: subtract IGD device and TSEG. */
130 reg8 = pci_read_config8(dev_find_slot(0, PCI_DEVFN(0, 0)), 0x9e);
133 printk(BIOS_DEBUG, "TSEG decoded, subtracting ");
138 tseg_size = 1024; /* TSEG = 1M */
141 tseg_size = 2048; /* TSEG = 2M */
144 tseg_size = 8192; /* 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);
155 printk(BIOS_DEBUG, "IGD decoded, subtracting ");
169 printk(BIOS_DEBUG, "%dM UMA\n", uma_size >> 10);
172 /* For reserving UMA memory in the memory map. */
173 uma_memory_base = tomk * 1024ULL;
174 uma_memory_size = uma_size * 1024ULL;
178 * The following needs to be 2 lines, otherwise the second
179 * number is always 0.
181 printk(BIOS_INFO, "Available memory: %dK", (u32) tomk);
182 printk(BIOS_INFO, " (%dM)\n", (u32) (tomk >> 10));
184 /* Report the memory regions. */
185 ram_resource(dev, 3, 0, 640);
186 ram_resource(dev, 4, 768, (tomk - 768));
187 if (tomk > 4 * 1024 * 1024)
188 ram_resource(dev, 5, 4096 * 1024, tomk - 4 * 1024 * 1024);
190 add_fixed_resources(dev, 6);
192 assign_resources(dev->link_list);
194 #if CONFIG_WRITE_HIGH_TABLES==1
195 /* Leave some space for ACPI, PIRQ and MP tables. */
196 high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
197 high_tables_size = HIGH_MEMORY_SIZE;
202 * TODO: We could determine how many PCIe busses we need in the bar. For now
203 * that number is hardcoded to a max of 64.
204 * See e7525/northbridge.c for an example.
206 static struct device_operations pci_domain_ops = {
207 .read_resources = pci_domain_read_resources,
208 .set_resources = pci_domain_set_resources,
209 .enable_resources = NULL,
211 .scan_bus = pci_domain_scan_bus,
212 #if CONFIG_MMCONF_SUPPORT_DEFAULT
213 .ops_pci_bus = &pci_ops_mmconf,
215 .ops_pci_bus = &pci_cf8_conf1,
219 static void mc_read_resources(device_t dev)
221 struct resource *resource;
223 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.
232 * We use 0xcf as an unused index for our PCIe bar so that we find
235 resource = new_resource(dev, 0xcf);
236 resource->flags = IORESOURCE_MEM | IORESOURCE_FIXED |
237 IORESOURCE_STORED | IORESOURCE_ASSIGNED;
238 get_pcie_bar((u32 *)&resource->base, (u32 *)&resource->size);
240 "Adding PCIe enhanced config space BAR 0x%08lx-0x%08lx.\n",
241 (unsigned long)(resource->base),
242 (unsigned long)(resource->base + resource->size));
245 static void mc_set_resources(device_t dev)
247 struct resource *resource;
249 /* Report the PCIe BAR. */
250 resource = find_resource(dev, 0xcf);
252 report_resource_stored(dev, resource, "<mmconfig>");
254 /* And call the normal set_resources. */
255 pci_dev_set_resources(dev);
258 static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device)
260 if (!vendor || !device) {
261 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
262 pci_read_config32(dev, PCI_VENDOR_ID));
264 pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
265 ((device & 0xffff) << 16) | (vendor & 0xffff));
269 #if CONFIG_HAVE_ACPI_RESUME
270 extern u8 acpi_slp_type;
272 static void northbridge_init(struct device *dev)
274 switch (pci_read_config32(dev, SKPAD)) {
276 printk(BIOS_DEBUG, "Normal boot.\n");
280 printk(BIOS_DEBUG, "S3 Resume.\n");
284 printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n");
291 static struct pci_operations intel_pci_ops = {
292 .set_subsystem = intel_set_subsystem,
295 static struct device_operations mc_ops = {
296 .read_resources = mc_read_resources,
297 .set_resources = mc_set_resources,
298 .enable_resources = pci_dev_enable_resources,
299 #if CONFIG_HAVE_ACPI_RESUME
300 .init = northbridge_init,
303 .ops_pci = &intel_pci_ops,
306 static const struct pci_driver mc_driver __pci_driver = {
308 .vendor = PCI_VENDOR_ID_INTEL,
312 static void cpu_bus_init(device_t dev)
314 initialize_cpus(dev->link_list);
317 static void cpu_bus_noop(device_t dev)
321 static struct device_operations cpu_bus_ops = {
322 .read_resources = cpu_bus_noop,
323 .set_resources = cpu_bus_noop,
324 .enable_resources = cpu_bus_noop,
325 .init = cpu_bus_init,
329 static void enable_dev(device_t dev)
331 /* Set the operations if it is a special bus type. */
332 if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
333 dev->ops = &pci_domain_ops;
334 } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
335 dev->ops = &cpu_bus_ops;
339 struct chip_operations northbridge_intel_sch_ops = {
340 CHIP_NAME("Intel SCH Northbridge")
341 .enable_dev = enable_dev,