copy e7501 component to e7505

Change-Id: Ie69a6b6a040a8b0e7693083b3a2d13c327a165b3
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/310
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

1 files changed, 141 insertions, 0 deletions

diff --git a/src/northbridge/intel/e7505/northbridge.c b/src/northbridge/intel/e7505/northbridge.c
new file mode 100644
index 0000000000..e6e955fb4f
--- /dev/null
+++ b/src/northbridge/intel/e7505/northbridge.c
@@ -0,0 +1,141 @@
+#include <console/console.h>
+#include <arch/io.h>
+#include <stdint.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <cpu/cpu.h>
+#include <stdlib.h>
+#include <string.h>
+#include <bitops.h>
+#include "chip.h"
+
+#if CONFIG_WRITE_HIGH_TABLES==1
+#include <cbmem.h>
+#endif
+
+static void pci_domain_set_resources(device_t dev)
+{
+	device_t mc_dev;
+        uint32_t pci_tolm;
+
+        pci_tolm = find_pci_tolm(dev->link_list);
+	mc_dev = dev->link_list->children;
+	if (mc_dev) {
+		/* Figure out which areas are/should be occupied by RAM.
+		 * This is all computed in kilobytes and converted to/from
+		 * the memory controller right at the edges.
+		 * Having different variables in different units is
+		 * too confusing to get right.  Kilobytes are good up to
+		 * 4 Terabytes of RAM...
+		 */
+		uint16_t tolm_r, remapbase_r, remaplimit_r;
+		unsigned long tomk, tolmk;
+		unsigned long remapbasek, remaplimitk;
+		int idx;
+
+		/* Get the value of the highest DRB. This tells the end of
+		 * the physical memory.  The units are ticks of 64MB
+		 * i.e. 1 means 64MB.
+		 */
+		tomk = ((unsigned long)pci_read_config8(mc_dev, 0x67)) << 16;
+		/* Compute the top of Low memory */
+		tolmk = pci_tolm >> 10;
+		if (tolmk >= tomk) {
+			/* The PCI hole does not overlap memory
+			 * we won't use the remap window.
+			 */
+			tolmk = tomk;
+			remapbasek   = 0x3ff << 16;
+			remaplimitk  = 0 << 16;
+		}
+		else {
+			/* The PCI memory hole overlaps memory
+			 * setup the remap window.
+			 */
+			/* Find the bottom of the remap window
+			 * is it above 4G?
+			 */
+			remapbasek = 4*1024*1024;
+			if (tomk > remapbasek) {
+				remapbasek = tomk;
+			}
+			/* Find the limit of the remap window */
+			remaplimitk = (remapbasek + (4*1024*1024 - tolmk) - (1 << 16));
+		}
+		/* Write the ram configuration registers,
+		 * preserving the reserved bits.
+		 */
+		tolm_r = pci_read_config16(mc_dev, 0xc4);
+		tolm_r = ((tolmk >> 17) << 11) | (tolm_r & 0x7ff);
+		pci_write_config16(mc_dev, 0xc4, tolm_r);
+
+		remapbase_r = pci_read_config16(mc_dev, 0xc6);
+		remapbase_r = (remapbasek >> 16) | (remapbase_r & 0xfc00);
+		pci_write_config16(mc_dev, 0xc6, remapbase_r);
+
+		remaplimit_r = pci_read_config16(mc_dev, 0xc8);
+		remaplimit_r = (remaplimitk >> 16) | (remaplimit_r & 0xfc00);
+		pci_write_config16(mc_dev, 0xc8, remaplimit_r);
+
+		/* Report the memory regions */
+		idx = 10;
+		ram_resource(dev, idx++, 0, 640);
+		ram_resource(dev, idx++, 768, tolmk - 768);
+		if (tomk > 4*1024*1024) {
+			ram_resource(dev, idx++, 4096*1024, tomk - 4*1024*1024);
+		}
+		if (remaplimitk >= remapbasek) {
+			ram_resource(dev, idx++, remapbasek,
+				(remaplimitk + 64*1024) - remapbasek);
+		}
+
+#if CONFIG_WRITE_HIGH_TABLES==1
+		/* Leave some space for ACPI, PIRQ and MP tables */
+		high_tables_base = (tolmk * 1024) - HIGH_MEMORY_SIZE;
+		high_tables_size = HIGH_MEMORY_SIZE;
+#endif
+	}
+	assign_resources(dev->link_list);
+}
+
+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,
+	.ops_pci_bus      = &pci_cf8_conf1,
+};
+
+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(struct device *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_e7501_ops = {
+	CHIP_NAME("Intel E7501 Northbridge")
+	.enable_dev = enable_dev,
+};