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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2009 Maciej Pijanka <maciej.pijanka@gmail.com>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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/io.h>
#include <stdint.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <stdlib.h>
#include <string.h>
#include <cbmem.h>
#include <cpu/cpu.h>
#include <pc80/keyboard.h>
#include "northbridge.h"
#include "i440lx.h"
/* This code is mostly same as 440BX created by Uwe Hermann,
* i done only very minor changes like renamed functions to 440lx etc
* Maciej
*/
static void northbridge_init(device_t dev)
{
printk(BIOS_SPEW, "Northbridge Init\n");
}
static struct device_operations northbridge_operations = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = northbridge_init,
.enable = 0,
.ops_pci = 0,
};
static const struct pci_driver northbridge_driver __pci_driver = {
.ops = &northbridge_operations,
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x7180,
};
static void i440lx_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) {
unsigned long tomk, tolmk;
int idx;
/* Figure out which areas are/should be occupied by RAM. The
* value of the highest DRB denotes the end of the physical
* memory (in units of 8MB).
*/
tomk = ((unsigned long)pci_read_config8(mc_dev, DRB7));
/* Convert to KB. */
tomk *= (8 * 1024);
printk(BIOS_DEBUG, "Setting RAM size to %lu MB\n", tomk / 1024);
/* Compute the top of low memory. */
tolmk = pci_tolm / 1024;
if (tolmk >= tomk) {
/* The PCI hole does not overlap the memory. */
tolmk = tomk;
}
/* Report the memory regions. */
idx = 10;
ram_resource(dev, idx++, 0, 640);
ram_resource(dev, idx++, 768, tolmk - 768);
set_top_of_ram(tomk * 1024);
}
assign_resources(dev->link_list);
}
static struct device_operations pci_domain_ops = {
.read_resources = pci_domain_read_resources,
.set_resources = i440lx_domain_set_resources,
.enable_resources = NULL,
.init = NULL,
.scan_bus = pci_domain_scan_bus,
.ops_pci_bus = pci_bus_default_ops,
};
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_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_i440lx_ops = {
CHIP_NAME("Intel 82443LX (440LX) Northbridge")
.enable_dev = enable_dev,
};
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