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/*
* This file is part of the coreboot project.
*
* 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.
*/
#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 "e7505.h"
#include <cbmem.h>
#include <arch/acpi.h>
unsigned long acpi_fill_mcfg(unsigned long current)
{
/* Just a dummy */
return current;
}
static void mch_domain_read_resources(struct device *dev)
{
struct device *mc_dev;
uint32_t pci_tolm;
pci_domain_read_resources(dev);
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, DRB_ROW_7)) << 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, TOLM);
tolm_r = ((tolmk >> 17) << 11) | (tolm_r & 0x7ff);
pci_write_config16(mc_dev, TOLM, tolm_r);
remapbase_r = pci_read_config16(mc_dev, REMAPBASE);
remapbase_r = (remapbasek >> 16) | (remapbase_r & 0xfc00);
pci_write_config16(mc_dev, REMAPBASE, remapbase_r);
remaplimit_r = pci_read_config16(mc_dev, REMAPLIMIT);
remaplimit_r = (remaplimitk >> 16) | (remaplimit_r & 0xfc00);
pci_write_config16(mc_dev, REMAPLIMIT, 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);
}
set_late_cbmem_top(tolmk * 1024);
}
}
static void mch_domain_set_resources(struct device *dev)
{
assign_resources(dev->link_list);
}
static void intel_set_subsystem(struct device *dev,
unsigned vendor, unsigned device)
{
pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID,
((device & 0xffff) << 16) | (vendor & 0xffff));
}
static struct pci_operations intel_pci_ops = {
.set_subsystem = intel_set_subsystem,
};
static struct device_operations pci_domain_ops = {
.read_resources = mch_domain_read_resources,
.set_resources = mch_domain_set_resources,
.enable_resources = NULL,
.init = NULL,
.scan_bus = pci_domain_scan_bus,
.ops_pci = &intel_pci_ops,
};
static void cpu_bus_init(struct device *dev)
{
initialize_cpus(dev->link_list);
}
static struct device_operations cpu_bus_ops = {
.read_resources = DEVICE_NOOP,
.set_resources = DEVICE_NOOP,
.enable_resources = DEVICE_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_DOMAIN) {
dev->ops = &pci_domain_ops;
}
else if (dev->path.type == DEVICE_PATH_CPU_CLUSTER) {
dev->ops = &cpu_bus_ops;
}
}
struct chip_operations northbridge_intel_e7505_ops = {
CHIP_NAME("Intel E7505 Northbridge")
.enable_dev = enable_dev,
};
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