Add support for Intel Sandybridge CPU (northbridge part)
Change-Id: I06228ecf9cac931ad34e32871d5a4f2a4857b2ac
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/854
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/northbridge/intel/sandybridge/northbridge.c b/src/northbridge/intel/sandybridge/northbridge.c
new file mode 100644
index 0000000..e3334c4
--- /dev/null
+++ b/src/northbridge/intel/sandybridge/northbridge.c
@@ -0,0 +1,483 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007-2009 coresystems GmbH
+ * Copyright (C) 2011 The ChromiumOS Authors. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <console/console.h>
+#include <arch/acpi.h>
+#include <arch/io.h>
+#include <stdint.h>
+#include <delay.h>
+#include <cpu/intel/model_206ax/model_206ax.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/hypertransport.h>
+#include <stdlib.h>
+#include <string.h>
+#include <bitops.h>
+#include <cpu/cpu.h>
+#include <boot/tables.h>
+#include "chip.h"
+#include "sandybridge.h"
+
+static int bridge_revision_id = -1;
+
+int bridge_silicon_revision(void)
+{
+ if (bridge_revision_id < 0) {
+ uint8_t stepping = cpuid_eax(1) & 0xf;
+ uint8_t bridge_id = pci_read_config16(
+ dev_find_slot(0, PCI_DEVFN(0, 0)),
+ PCI_DEVICE_ID) & 0xf0;
+ bridge_revision_id = bridge_id | stepping;
+ }
+ return bridge_revision_id;
+}
+
+/* Reserve everything between A segment and 1MB:
+ *
+ * 0xa0000 - 0xbffff: legacy VGA
+ * 0xc0000 - 0xcffff: VGA OPROM (needed by kernel)
+ * 0xe0000 - 0xfffff: SeaBIOS, if used, otherwise DMI
+ */
+static const int legacy_hole_base_k = 0xa0000 / 1024;
+static const int legacy_hole_size_k = 384;
+
+int add_northbridge_resources(struct lb_memory *mem)
+{
+ lb_add_memory_range(mem, LB_MEM_RESERVED,
+ legacy_hole_base_k * 1024, legacy_hole_size_k * 1024);
+
+#if CONFIG_CHROMEOS_RAMOOPS
+ lb_add_memory_range(mem, LB_MEM_RESERVED,
+ CONFIG_CHROMEOS_RAMOOPS_RAM_START,
+ CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE);
+#endif
+
+ /* Required for SandyBridge sighting 3715511 */
+ lb_add_memory_range(mem, LB_MEM_RESERVED, 0x20000000, 0x00200000);
+ lb_add_memory_range(mem, LB_MEM_RESERVED, 0x40000000, 0x00200000);
+
+ return 0;
+}
+
+static int get_pcie_bar(u32 *base, u32 *len)
+{
+ device_t dev;
+ u32 pciexbar_reg;
+
+ *base = 0;
+ *len = 0;
+
+ dev = dev_find_slot(0, PCI_DEVFN(0, 0));
+ if (!dev)
+ return 0;
+
+ pciexbar_reg = pci_read_config32(dev, PCIEXBAR);
+
+ if (!(pciexbar_reg & (1 << 0)))
+ return 0;
+
+ switch ((pciexbar_reg >> 1) & 3) {
+ case 0: // 256MB
+ *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28));
+ *len = 256 * 1024 * 1024;
+ return 1;
+ case 1: // 128M
+ *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27));
+ *len = 128 * 1024 * 1024;
+ return 1;
+ case 2: // 64M
+ *base = pciexbar_reg & ((1 << 31)|(1 << 30)|(1 << 29)|(1 << 28)|(1 << 27)|(1 << 26));
+ *len = 64 * 1024 * 1024;
+ return 1;
+ }
+
+ return 0;
+}
+
+/* IDG memory */
+uint64_t uma_memory_base=0, uma_memory_size=0;
+
+static void add_fixed_resources(struct device *dev, int index)
+{
+ struct resource *resource;
+ u32 pcie_config_base, pcie_config_size;
+
+ printk(BIOS_DEBUG, "Adding UMA memory area base=0x%llx "
+ "size=0x%llx\n", uma_memory_base, uma_memory_size);
+ resource = new_resource(dev, index);
+ resource->base = (resource_t) uma_memory_base;
+ resource->size = (resource_t) uma_memory_size;
+ resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
+ IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
+
+ /* Clear these values here so they don't get used by MTRR code */
+ uma_memory_base = 0;
+ uma_memory_size = 0;
+
+ if (get_pcie_bar(&pcie_config_base, &pcie_config_size)) {
+ printk(BIOS_DEBUG, "Adding PCIe config bar base=0x%08x "
+ "size=0x%x\n", pcie_config_base, pcie_config_size);
+ resource = new_resource(dev, index+1);
+ resource->base = (resource_t) pcie_config_base;
+ resource->size = (resource_t) pcie_config_size;
+ resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE |
+ IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED;
+ }
+}
+
+#if CONFIG_WRITE_HIGH_TABLES==1
+#include <cbmem.h>
+#endif
+
+static void pci_domain_set_resources(device_t dev)
+{
+ uint64_t tom, me_base, touud;
+ uint32_t tseg_base, uma_size, tolud;
+ uint16_t ggc;
+ unsigned long long tomk;
+
+ /* Total Memory 2GB example:
+ *
+ * 00000000 0000MB-1992MB 1992MB RAM (writeback)
+ * 7c800000 1992MB-2000MB 8MB TSEG (SMRR)
+ * 7d000000 2000MB-2002MB 2MB GFX GTT (uncached)
+ * 7d200000 2002MB-2034MB 32MB GFX UMA (uncached)
+ * 7f200000 2034MB TOLUD
+ * 7f800000 2040MB MEBASE
+ * 7f800000 2040MB-2048MB 8MB ME UMA (uncached)
+ * 80000000 2048MB TOM
+ * 100000000 4096MB-4102MB 6MB RAM (writeback)
+ *
+ * Total Memory 4GB example:
+ *
+ * 00000000 0000MB-2768MB 2768MB RAM (writeback)
+ * ad000000 2768MB-2776MB 8MB TSEG (SMRR)
+ * ad800000 2776MB-2778MB 2MB GFX GTT (uncached)
+ * ada00000 2778MB-2810MB 32MB GFX UMA (uncached)
+ * afa00000 2810MB TOLUD
+ * ff800000 4088MB MEBASE
+ * ff800000 4088MB-4096MB 8MB ME UMA (uncached)
+ * 100000000 4096MB TOM
+ * 100000000 4096MB-5374MB 1278MB RAM (writeback)
+ * 14fe00000 5368MB TOUUD
+ */
+
+ /* Top of Upper Usable DRAM, including remap */
+ touud = pci_read_config32(dev, TOUUD+4);
+ touud <<= 32;
+ touud |= pci_read_config32(dev, TOUUD);
+
+ /* Top of Lower Usable DRAM */
+ tolud = pci_read_config32(dev, TOLUD);
+
+ /* Top of Memory - does not account for any UMA */
+ tom = pci_read_config32(dev, 0xa4);
+ tom <<= 32;
+ tom |= pci_read_config32(dev, 0xa0);
+
+ printk(BIOS_DEBUG, "TOUUD 0x%llx TOLUD 0x%08x TOM 0x%llx\n",
+ touud, tolud, tom);
+
+ /* ME UMA needs excluding if total memory <4GB */
+ me_base = pci_read_config32(dev, 0x74);
+ me_base <<= 32;
+ me_base |= pci_read_config32(dev, 0x70);
+
+ printk(BIOS_DEBUG, "MEBASE 0x%llx\n", me_base);
+
+ tomk = tolud >> 10;
+ if (me_base == tolud) {
+ /* ME is from MEBASE-TOM */
+ uma_size = (tom - me_base) >> 10;
+ /* Increment TOLUD to account for ME as RAM */
+ tolud += uma_size << 10;
+ /* UMA starts at old TOLUD */
+ uma_memory_base = tomk * 1024ULL;
+ uma_memory_size = uma_size * 1024ULL;
+ printk(BIOS_DEBUG, "ME UMA base 0x%llx size %uM\n",
+ me_base, uma_size >> 10);
+ }
+
+ /* Graphics memory comes next */
+ ggc = pci_read_config16(dev, GGC);
+ if (!(ggc & 2)) {
+ printk(BIOS_DEBUG, "IGD decoded, subtracting ");
+
+ /* Graphics memory */
+ uma_size = ((ggc >> 3) & 0x1f) * 32 * 1024ULL;
+ printk(BIOS_DEBUG, "%uM UMA", uma_size >> 10);
+ tomk -= uma_size;
+ uma_memory_base = tomk * 1024ULL;
+ uma_memory_size += uma_size * 1024ULL;
+
+ /* GTT Graphics Stolen Memory Size (GGMS) */
+ uma_size = ((ggc >> 8) & 0x3) * 1024ULL;
+ tomk -= uma_size;
+ uma_memory_base = tomk * 1024ULL;
+ uma_memory_size += uma_size * 1024ULL;
+ printk(BIOS_DEBUG, " and %uM GTT\n", uma_size >> 10);
+ }
+
+ /* Calculate TSEG size from its base which must be below GTT */
+ tseg_base = pci_read_config32(dev, 0xb8);
+ uma_size = (uma_memory_base - tseg_base) >> 10;
+ tomk -= uma_size;
+ uma_memory_base = tomk * 1024ULL;
+ uma_memory_size += uma_size * 1024ULL;
+ printk(BIOS_DEBUG, "TSEG base 0x%08x size %uM\n",
+ tseg_base, uma_size >> 10);
+
+ printk(BIOS_INFO, "Available memory below 4GB: %lluM\n", tomk >> 10);
+
+ /* Report the memory regions */
+ ram_resource(dev, 3, 0, legacy_hole_base_k);
+ ram_resource(dev, 4, legacy_hole_base_k + legacy_hole_size_k,
+ (tomk - (legacy_hole_base_k + legacy_hole_size_k)));
+
+ /*
+ * If >= 4GB installed then memory from TOLUD to 4GB
+ * is remapped above TOM, TOUUD will account for both
+ */
+ touud >>= 10; /* Convert to KB */
+ if (touud > 4096 * 1024) {
+ ram_resource(dev, 5, 4096 * 1024, touud - (4096 * 1024));
+ printk(BIOS_INFO, "Available memory above 4GB: %lluM\n",
+ (touud >> 10) - 4096);
+ }
+
+ add_fixed_resources(dev, 6);
+
+ assign_resources(dev->link_list);
+
+#if CONFIG_WRITE_HIGH_TABLES==1
+ /* Leave some space for ACPI, PIRQ and MP tables */
+ high_tables_base = (tomk * 1024) - HIGH_MEMORY_SIZE;
+ high_tables_size = HIGH_MEMORY_SIZE;
+#endif
+}
+
+ /* TODO We could determine how many PCIe busses we need in
+ * the bar. For now that number is hardcoded to a max of 64.
+ * See e7525/northbridge.c for an example.
+ */
+static struct device_operations pci_domain_ops = {
+ .read_resources = pci_domain_read_resources,
+ .set_resources = pci_domain_set_resources,
+ .enable_resources = NULL,
+ .init = NULL,
+ .scan_bus = pci_domain_scan_bus,
+#if CONFIG_MMCONF_SUPPORT_DEFAULT
+ .ops_pci_bus = &pci_ops_mmconf,
+#else
+ .ops_pci_bus = &pci_cf8_conf1,
+#endif
+};
+
+static void mc_read_resources(device_t dev)
+{
+ struct resource *resource;
+
+ pci_dev_read_resources(dev);
+
+ /* So, this is one of the big mysteries in the coreboot resource
+ * allocator. This resource should make sure that the address space
+ * of the PCIe memory mapped config space bar. But it does not.
+ */
+
+ /* We use 0xcf as an unused index for our PCIe bar so that we find it again */
+ resource = new_resource(dev, 0xcf);
+ resource->base = DEFAULT_PCIEXBAR;
+ resource->size = 64 * 1024 * 1024; /* 64MB hard coded PCIe config space */
+ resource->flags =
+ IORESOURCE_MEM | IORESOURCE_FIXED | IORESOURCE_STORED |
+ IORESOURCE_ASSIGNED;
+ printk(BIOS_DEBUG, "Adding PCIe enhanced config space BAR 0x%08lx-0x%08lx.\n",
+ (unsigned long)(resource->base), (unsigned long)(resource->base + resource->size));
+}
+
+static void mc_set_resources(device_t dev)
+{
+ struct resource *resource;
+
+ /* Report the PCIe BAR */
+ resource = find_resource(dev, 0xcf);
+ if (resource) {
+ report_resource_stored(dev, resource, "<mmconfig>");
+ }
+
+ /* And call the normal set_resources */
+ pci_dev_set_resources(dev);
+}
+
+static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device)
+{
+ if (!vendor || !device) {
+ pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
+ pci_read_config32(dev, PCI_VENDOR_ID));
+ } else {
+ pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
+ ((device & 0xffff) << 16) | (vendor & 0xffff));
+ }
+}
+
+static void northbridge_dmi_init(struct device *dev)
+{
+ u32 reg32;
+
+ /* Clear error status bits */
+ DMIBAR32(0x1c4) = 0xffffffff;
+ DMIBAR32(0x1d0) = 0xffffffff;
+
+ /* Steps prior to DMI ASPM */
+ reg32 = DMIBAR32(0x250);
+ reg32 &= ~((1 << 22)|(1 << 20));
+ reg32 |= (1 << 21);
+ DMIBAR32(0x250) = reg32;
+
+ reg32 = DMIBAR32(0x238);
+ reg32 |= (1 << 29);
+ DMIBAR32(0x238) = reg32;
+
+ if (bridge_silicon_revision() >= SNB_STEP_D0) {
+ reg32 = DMIBAR32(0x1f8);
+ reg32 |= (1 << 16);
+ DMIBAR32(0x1f8) = reg32;
+ } else if (bridge_silicon_revision() >= SNB_STEP_D1) {
+ reg32 = DMIBAR32(0x1f8);
+ reg32 &= ~(1 << 26);
+ reg32 |= (1 << 16);
+ DMIBAR32(0x1f8) = reg32;
+
+ reg32 = DMIBAR32(0x1fc);
+ reg32 |= (1 << 12) | (1 << 23);
+ DMIBAR32(0x1fc) = reg32;
+ }
+
+ /* Enable ASPM on SNB link, should happen before PCH link */
+ reg32 = DMIBAR32(0xd04);
+ reg32 |= (1 << 4);
+ DMIBAR32(0xd04) = reg32;
+
+ reg32 = DMIBAR32(0x88);
+ reg32 |= (1 << 1) | (1 << 0);
+ DMIBAR32(0x88) = reg32;
+}
+
+static void northbridge_init(struct device *dev)
+{
+ u8 bios_reset_cpl;
+
+ northbridge_dmi_init(dev);
+
+ /*
+ * Set bit 0 of BIOS_RESET_CPL to indicate to the CPU
+ * that BIOS has initialized memory and power management
+ */
+ bios_reset_cpl = MCHBAR8(BIOS_RESET_CPL);
+ bios_reset_cpl |= 1;
+ MCHBAR8(BIOS_RESET_CPL) = bios_reset_cpl;
+ printk(BIOS_DEBUG, "Set BIOS_RESET_CPL\n");
+
+ /* Configure turbo power limits 1ms after reset complete bit */
+ mdelay(1);
+ set_power_limits(28);
+
+ /* Set here before graphics PM init */
+ MCHBAR32(0x5500) = 0x00100001;
+}
+
+static void northbridge_enable(device_t dev)
+{
+#if CONFIG_HAVE_ACPI_RESUME
+ switch (pci_read_config32(dev, SKPAD)) {
+ case 0xcafebabe:
+ printk(BIOS_DEBUG, "Normal boot.\n");
+ acpi_slp_type=0;
+ break;
+ case 0xcafed00d:
+ printk(BIOS_DEBUG, "S3 Resume.\n");
+ acpi_slp_type=3;
+ break;
+ default:
+ printk(BIOS_DEBUG, "Unknown boot method, assuming normal.\n");
+ acpi_slp_type=0;
+ break;
+ }
+#endif
+}
+
+static struct pci_operations intel_pci_ops = {
+ .set_subsystem = intel_set_subsystem,
+};
+
+static struct device_operations mc_ops = {
+ .read_resources = mc_read_resources,
+ .set_resources = mc_set_resources,
+ .enable_resources = pci_dev_enable_resources,
+ .init = northbridge_init,
+ .enable = northbridge_enable,
+ .scan_bus = 0,
+ .ops_pci = &intel_pci_ops,
+};
+
+static const struct pci_driver mc_driver __pci_driver = {
+ .ops = &mc_ops,
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .device = 0x0104, /* Sandy bridge */
+};
+
+static const struct pci_driver mc_driver_1 __pci_driver = {
+ .ops = &mc_ops,
+ .vendor = PCI_VENDOR_ID_INTEL,
+ .device = 0x0154, /* Ivy bridge */
+};
+
+static void cpu_bus_init(device_t dev)
+{
+ initialize_cpus(dev->link_list);
+}
+
+static void cpu_bus_noop(device_t dev)
+{
+}
+
+static struct device_operations cpu_bus_ops = {
+ .read_resources = cpu_bus_noop,
+ .set_resources = cpu_bus_noop,
+ .enable_resources = cpu_bus_noop,
+ .init = cpu_bus_init,
+ .scan_bus = 0,
+};
+
+static void enable_dev(device_t dev)
+{
+ /* Set the operations if it is a special bus type */
+ if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) {
+ dev->ops = &pci_domain_ops;
+ } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) {
+ dev->ops = &cpu_bus_ops;
+ }
+}
+
+struct chip_operations northbridge_intel_sandybridge_ops = {
+ CHIP_NAME("Intel i7 (Sandybridge) integrated Northbridge")
+ .enable_dev = enable_dev,
+};