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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Corey Osgood <corey.osgood@gmail.com>
* Copyright (C) 2010 Joseph Smith <joe@settoplinux.org>
*
* 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.
*/
#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 "northbridge.h"
#include "i82810.h"
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,
};
/* Intel 82810/82810-DC100 */
static const struct pci_driver i810_northbridge_driver __pci_driver = {
.ops = &northbridge_operations,
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x7120,
};
/* Intel 82810E */
static const struct pci_driver i810e_northbridge_driver __pci_driver = {
.ops = &northbridge_operations,
.vendor = PCI_VENDOR_ID_INTEL,
.device = 0x7124,
};
/* Table which returns the RAM size in MB when fed the DRP[7:4] or [3:0] value.
* Note that 2 is a value which the DRP should never be programmed to.
* Some size values appear twice, due to single-sided vs dual-sided banks.
*/
static int translate_i82810_to_mb[] = {
/* DRP 0 1 (2) 3 4 5 6 7 8 9 A B C D E F */
/* MB */0, 8, 0, 16, 16, 24, 32, 32, 48, 64, 64, 96, 128, 128, 192, 256,
};
static void pci_domain_set_resources(device_t dev)
{
device_t mc_dev;
int igd_memory = 0;
uint64_t uma_memory_base = 0, uma_memory_size = 0;
mc_dev = dev->link_list->children;
if (!mc_dev)
return;
unsigned long tomk, tomk_stolen;
int idx, drp_value;
u8 reg8;
reg8 = pci_read_config8(mc_dev, SMRAM);
reg8 &= 0xc0;
switch (reg8) {
case 0xc0:
igd_memory = 1024;
printk(BIOS_DEBUG, "%dKB IGD UMA\n", igd_memory);
break;
case 0x80:
igd_memory = 512;
printk(BIOS_DEBUG, "%dKB IGD UMA\n", igd_memory);
break;
default:
igd_memory = 0;
printk(BIOS_DEBUG, "No IGD UMA Memory\n");
break;
}
/* Get the value for DIMM 0 and translate it to MB. */
drp_value = pci_read_config8(mc_dev, DRP);
tomk = (unsigned long)(translate_i82810_to_mb[drp_value & 0x0f]);
/* Get the value for DIMM 1 and translate it to MB. */
drp_value = drp_value >> 4;
tomk += (unsigned long)(translate_i82810_to_mb[drp_value]);
/* Convert tomk from MB to KB. */
tomk = tomk << 10;
tomk_stolen = tomk - igd_memory;
/* For reserving UMA memory in the memory map */
uma_memory_base = tomk_stolen * 1024ULL;
uma_memory_size = igd_memory * 1024ULL;
printk(BIOS_DEBUG, "Available memory: %ldKB\n", tomk_stolen);
/* Report the memory regions. */
idx = 10;
ram_resource(dev, idx++, 0, 640);
ram_resource(dev, idx++, 768, tomk - 768);
uma_resource(dev, idx++, uma_memory_base >> 10, uma_memory_size >> 10);
set_top_of_ram(tomk_stolen * 1024);
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_bus_default_ops,
};
static void cpu_bus_init(device_t 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_i82810_ops = {
CHIP_NAME("Intel 82810 Northbridge")
.enable_dev = enable_dev,
};
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